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2024-09-09 08:52:07 +00:00
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system/core/init/Android.mk
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# Copyright 2005 The Android Open Source Project
# Copyright (c) 2009, The Linux Foundation. All rights reserved.
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= \
builtins.c \
init.c \
devices.c \
property_service.c \
util.c \
parser.c \
logo.c \
keychords.c \
signal_handler.c \
init_parser.c \
ueventd.c \
ueventd_parser.c
ifeq ($(strip $(INIT_BOOTCHART)),true)
LOCAL_SRC_FILES += bootchart.c
LOCAL_CFLAGS += -DBOOTCHART=1
endif
ifneq (, $(filter qsd8250_surf qsd8250_ffa, $(TARGET_PRODUCT)))
LOCAL_CFLAGS += -DSURF8K
endif
LOCAL_MODULE:= init
LOCAL_FORCE_STATIC_EXECUTABLE := true
LOCAL_MODULE_PATH := $(TARGET_ROOT_OUT)
LOCAL_UNSTRIPPED_PATH := $(TARGET_ROOT_OUT_UNSTRIPPED)
LOCAL_STATIC_LIBRARIES := libcutils libc
include $(BUILD_EXECUTABLE)
# Make a symlink from /sbin/ueventd to /init
SYMLINKS := $(TARGET_ROOT_OUT)/sbin/ueventd
$(SYMLINKS): INIT_BINARY := $(LOCAL_MODULE)
$(SYMLINKS): $(LOCAL_INSTALLED_MODULE) $(LOCAL_PATH)/Android.mk
@echo "Symlink: $@ -> ../$(INIT_BINARY)"
@mkdir -p $(dir $@)
@rm -rf $@
$(hide) ln -sf ../$(INIT_BINARY) $@
ALL_DEFAULT_INSTALLED_MODULES += $(SYMLINKS)
# We need this so that the installed files could be picked up based on the
# local module name
ALL_MODULES.$(LOCAL_MODULE).INSTALLED := \
$(ALL_MODULES.$(LOCAL_MODULE).INSTALLED) $(SYMLINKS)
system/core/init/MODULE_LICENSE_APACHE2
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system/core/init/NOTICE
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Copyright (c) 2005-2008, The Android Open Source Project
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
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excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
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of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
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within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
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that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
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the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
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Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
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on Your own behalf and on Your sole responsibility, not on behalf
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END OF TERMS AND CONDITIONS
system/core/init/README.BOOTCHART
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This version of init contains code to perform "bootcharting", i.e. generating log
files that can be later processed by the tools provided by www.bootchart.org.
To activate it, you need to define build 'init' with the INIT_BOOTCHART environment
variable defined to 'true', for example:
touch system/init/init.c
m INIT_BOOTCHART=true
On the emulator, use the new -bootchart <timeout> option to boot with bootcharting
activated for <timeout> seconds.
Otherwise, flash your device, and start it. Then create a file on the /data partition
with a command like the following:
adb shell 'echo $TIMEOUT > /data/bootchart-start'
Where the value of $TIMEOUT corresponds to the wanted bootcharted period in seconds;
for example, to bootchart for 2 minutes, do:
adb shell 'echo 120 > /data/bootchart-start'
Reboot your device, bootcharting will begin and stop after the period you gave.
You can also stop the bootcharting at any moment by doing the following:
adb shell 'echo 1 > /data/bootchart-stop'
Note that /data/bootchart-stop is deleted automatically by init at the end of the
bootcharting. This is not the case of /data/bootchart-start, so don't forget to delete it
when you're done collecting data:
adb shell rm /data/bootchart-start
The log files are placed in /data/bootchart/. you must run the script tools/grab-bootchart.sh
which will use ADB to retrieve them and create a bootchart.tgz file that can be used with
the bootchart parser/renderer, or even uploaded directly to the form located at:
http://www.bootchart.org/download.html
NOTE: the bootchart.org webform doesn't seem to work at the moment, you can generate an
image on your machine by doing the following:
1/ download the sources from www.bootchart.org
2/ unpack them
3/ in the source directory, type 'ant' to build the bootchart program
4/ type 'java -jar bootchart.jar /path/to/bootchart.tgz
technical note:
this implementation of bootcharting does use the 'bootchartd' script provided by
www.bootchart.org, but a C re-implementation that is directly compiled into our init
program.
system/core/init/bootchart.c
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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/* this code is used to generate a boot sequence profile that can be used
* with the 'bootchart' graphics generation tool. see www.bootchart.org
* note that unlike the original bootchartd, this is not a Bash script but
* some C code that is run right from the init script.
*/
#include <stdio.h>
#include <time.h>
#include <dirent.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <fcntl.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/stat.h>
#include "bootchart.h"
#define VERSION "0.8"
#define SAMPLE_PERIOD 0.2
#define LOG_ROOT "/data/bootchart"
#define LOG_STAT LOG_ROOT"/proc_stat.log"
#define LOG_PROCS LOG_ROOT"/proc_ps.log"
#define LOG_DISK LOG_ROOT"/proc_diskstats.log"
#define LOG_HEADER LOG_ROOT"/header"
#define LOG_ACCT LOG_ROOT"/kernel_pacct"
#define LOG_STARTFILE "/data/bootchart-start"
#define LOG_STOPFILE "/data/bootchart-stop"
static int
unix_read(int fd, void* buff, int len)
{
int ret;
do { ret = read(fd, buff, len); } while (ret < 0 && errno == EINTR);
return ret;
}
static int
unix_write(int fd, const void* buff, int len)
{
int ret;
do { ret = write(fd, buff, len); } while (ret < 0 && errno == EINTR);
return ret;
}
static int
proc_read(const char* filename, char* buff, size_t buffsize)
{
int len = 0;
int fd = open(filename, O_RDONLY);
if (fd >= 0) {
len = unix_read(fd, buff, buffsize-1);
close(fd);
}
buff[len > 0 ? len : 0] = 0;
return len;
}
#define FILE_BUFF_SIZE 65536
typedef struct {
int count;
int fd;
char data[FILE_BUFF_SIZE];
} FileBuffRec, *FileBuff;
static void
file_buff_open( FileBuff buff, const char* path )
{
buff->count = 0;
buff->fd = open(path, O_WRONLY|O_CREAT|O_TRUNC, 0755);
}
static void
file_buff_write( FileBuff buff, const void* src, int len )
{
while (len > 0) {
int avail = sizeof(buff->data) - buff->count;
if (avail > len)
avail = len;
memcpy( buff->data + buff->count, src, avail );
len -= avail;
src = (char*)src + avail;
buff->count += avail;
if (buff->count == FILE_BUFF_SIZE) {
unix_write( buff->fd, buff->data, buff->count );
buff->count = 0;
}
}
}
static void
file_buff_done( FileBuff buff )
{
if (buff->count > 0) {
unix_write( buff->fd, buff->data, buff->count );
buff->count = 0;
}
}
static void
log_header(void)
{
FILE* out;
char cmdline[1024];
char uname[128];
char cpuinfo[128];
char* cpu;
char date[32];
time_t now_t = time(NULL);
struct tm now = *localtime(&now_t);
strftime(date, sizeof(date), "%x %X", &now);
out = fopen( LOG_HEADER, "w" );
if (out == NULL)
return;
proc_read("/proc/cmdline", cmdline, sizeof(cmdline));
proc_read("/proc/version", uname, sizeof(uname));
proc_read("/proc/cpuinfo", cpuinfo, sizeof(cpuinfo));
cpu = strchr( cpuinfo, ':' );
if (cpu) {
char* p = strchr(cpu, '\n');
cpu += 2;
if (p)
*p = 0;
}
fprintf(out, "version = %s\n", VERSION);
fprintf(out, "title = Boot chart for Android ( %s )\n", date);
fprintf(out, "system.uname = %s\n", uname);
fprintf(out, "system.release = 0.0\n");
fprintf(out, "system.cpu = %s\n", cpu);
fprintf(out, "system.kernel.options = %s\n", cmdline);
fclose(out);
}
static void
close_on_exec(int fd)
{
fcntl(fd, F_SETFD, FD_CLOEXEC);
}
static void
open_log_file(int* plogfd, const char* logfile)
{
int logfd = *plogfd;
/* create log file if needed */
if (logfd < 0)
{
logfd = open(logfile,O_WRONLY|O_CREAT|O_TRUNC,0755);
if (logfd < 0) {
*plogfd = -2;
return;
}
close_on_exec(logfd);
*plogfd = logfd;
}
}
static void
do_log_uptime(FileBuff log)
{
char buff[65];
int fd, ret, len;
fd = open("/proc/uptime",O_RDONLY);
if (fd >= 0) {
int ret;
ret = unix_read(fd, buff, 64);
close(fd);
buff[64] = 0;
if (ret >= 0) {
long long jiffies = 100LL*strtod(buff,NULL);
int len;
snprintf(buff,sizeof(buff),"%lld\n",jiffies);
len = strlen(buff);
file_buff_write(log, buff, len);
}
}
}
static void
do_log_ln(FileBuff log)
{
file_buff_write(log, "\n", 1);
}
static void
do_log_file(FileBuff log, const char* procfile)
{
char buff[1024];
int fd;
do_log_uptime(log);
/* append file content */
fd = open(procfile,O_RDONLY);
if (fd >= 0) {
close_on_exec(fd);
for (;;) {
int ret;
ret = unix_read(fd, buff, sizeof(buff));
if (ret <= 0)
break;
file_buff_write(log, buff, ret);
if (ret < (int)sizeof(buff))
break;
}
close(fd);
}
do_log_ln(log);
}
static void
do_log_procs(FileBuff log)
{
DIR* dir = opendir("/proc");
struct dirent* entry;
do_log_uptime(log);
while ((entry = readdir(dir)) != NULL) {
/* only match numeric values */
char* end;
int pid = strtol( entry->d_name, &end, 10);
if (end != NULL && end > entry->d_name && *end == 0) {
char filename[32];
char buff[1024];
char cmdline[1024];
int len;
int fd;
/* read command line and extract program name */
snprintf(filename,sizeof(filename),"/proc/%d/cmdline",pid);
proc_read(filename, cmdline, sizeof(cmdline));
/* read process stat line */
snprintf(filename,sizeof(filename),"/proc/%d/stat",pid);
fd = open(filename,O_RDONLY);
if (fd >= 0) {
len = unix_read(fd, buff, sizeof(buff)-1);
close(fd);
if (len > 0) {
int len2 = strlen(cmdline);
if (len2 > 0) {
/* we want to substitute the process name with its real name */
const char* p1;
const char* p2;
buff[len] = 0;
p1 = strchr(buff, '(');
p2 = strchr(p1, ')');
file_buff_write(log, buff, p1+1-buff);
file_buff_write(log, cmdline, strlen(cmdline));
file_buff_write(log, p2, strlen(p2));
} else {
/* no substitution */
file_buff_write(log,buff,len);
}
}
}
}
}
closedir(dir);
do_log_ln(log);
}
static FileBuffRec log_stat[1];
static FileBuffRec log_procs[1];
static FileBuffRec log_disks[1];
/* called to setup bootcharting */
int bootchart_init( void )
{
int ret;
char buff[4];
int timeout = 0, count = 0;
buff[0] = 0;
proc_read( LOG_STARTFILE, buff, sizeof(buff) );
if (buff[0] != 0) {
timeout = atoi(buff);
}
else {
/* when running with emulator, androidboot.bootchart=<timeout>
* might be passed by as kernel parameters to specify the bootchart
* timeout. this is useful when using -wipe-data since the /data
* partition is fresh
*/
char cmdline[1024];
char* s;
#define KERNEL_OPTION "androidboot.bootchart="
proc_read( "/proc/cmdline", cmdline, sizeof(cmdline) );
s = strstr(cmdline, KERNEL_OPTION);
if (s) {
s += sizeof(KERNEL_OPTION)-1;
timeout = atoi(s);
}
}
if (timeout == 0)
return 0;
if (timeout > BOOTCHART_MAX_TIME_SEC)
timeout = BOOTCHART_MAX_TIME_SEC;
count = (timeout*1000 + BOOTCHART_POLLING_MS-1)/BOOTCHART_POLLING_MS;
do {ret=mkdir(LOG_ROOT,0755);}while (ret < 0 && errno == EINTR);
file_buff_open(log_stat, LOG_STAT);
file_buff_open(log_procs, LOG_PROCS);
file_buff_open(log_disks, LOG_DISK);
/* create kernel process accounting file */
{
int fd = open( LOG_ACCT, O_WRONLY|O_CREAT|O_TRUNC,0644);
if (fd >= 0) {
close(fd);
acct( LOG_ACCT );
}
}
log_header();
return count;
}
/* called each time you want to perform a bootchart sampling op */
int bootchart_step( void )
{
do_log_file(log_stat, "/proc/stat");
do_log_file(log_disks, "/proc/diskstats");
do_log_procs(log_procs);
/* we stop when /data/bootchart-stop contains 1 */
{
char buff[2];
if (proc_read(LOG_STOPFILE,buff,sizeof(buff)) > 0 && buff[0] == '1') {
return -1;
}
}
return 0;
}
void bootchart_finish( void )
{
unlink( LOG_STOPFILE );
file_buff_done(log_stat);
file_buff_done(log_disks);
file_buff_done(log_procs);
acct(NULL);
}
system/core/init/bootchart.h
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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _BOOTCHART_H
#define _BOOTCHART_H
#ifndef BOOTCHART
# define BOOTCHART 0
#endif
#if BOOTCHART
extern int bootchart_init(void);
extern int bootchart_step(void);
extern void bootchart_finish(void);
# define BOOTCHART_POLLING_MS 200 /* polling period in ms */
# define BOOTCHART_DEFAULT_TIME_SEC (2*60) /* default polling time in seconds */
# define BOOTCHART_MAX_TIME_SEC (10*60) /* max polling time in seconds */
#endif /* BOOTCHART */
#endif /* _BOOTCHART_H */
system/core/init/builtins.c
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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <linux/kd.h>
#include <errno.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/if.h>
#include <arpa/inet.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <linux/loop.h>
#include "init.h"
#include "keywords.h"
#include "property_service.h"
#include "devices.h"
#include "init_parser.h"
#include "util.h"
#include "log.h"
#include <private/android_filesystem_config.h>
void add_environment(const char *name, const char *value);
extern int init_module(void *, unsigned long, const char *);
static int write_file(const char *path, const char *value)
{
int fd, ret, len;
fd = open(path, O_WRONLY|O_CREAT, 0622);
if (fd < 0)
return -errno;
len = strlen(value);
do {
ret = write(fd, value, len);
} while (ret < 0 && errno == EINTR);
close(fd);
if (ret < 0) {
return -errno;
} else {
return 0;
}
}
static int insmod(const char *filename, char *options)
{
void *module;
unsigned size;
int ret;
module = read_file(filename, &size);
if (!module)
return -1;
ret = init_module(module, size, options);
free(module);
return ret;
}
static int setkey(struct kbentry *kbe)
{
int fd, ret;
fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (fd < 0)
return -1;
ret = ioctl(fd, KDSKBENT, kbe);
close(fd);
return ret;
}
static int __ifupdown(const char *interface, int up)
{
struct ifreq ifr;
int s, ret;
strlcpy(ifr.ifr_name, interface, IFNAMSIZ);
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
return -1;
ret = ioctl(s, SIOCGIFFLAGS, &ifr);
if (ret < 0) {
goto done;
}
if (up)
ifr.ifr_flags |= IFF_UP;
else
ifr.ifr_flags &= ~IFF_UP;
ret = ioctl(s, SIOCSIFFLAGS, &ifr);
done:
close(s);
return ret;
}
static void service_start_if_not_disabled(struct service *svc)
{
if (!(svc->flags & SVC_DISABLED)) {
service_start(svc, NULL);
}
}
int do_chdir(int nargs, char **args)
{
chdir(args[1]);
return 0;
}
int do_chroot(int nargs, char **args)
{
chroot(args[1]);
return 0;
}
int do_class_start(int nargs, char **args)
{
/* Starting a class does not start services
* which are explicitly disabled. They must
* be started individually.
*/
service_for_each_class(args[1], service_start_if_not_disabled);
return 0;
}
int do_class_stop(int nargs, char **args)
{
service_for_each_class(args[1], service_stop);
return 0;
}
int do_domainname(int nargs, char **args)
{
return write_file("/proc/sys/kernel/domainname", args[1]);
}
/*exec <path> <arg1> <arg2> ... */
#define MAX_PARAMETERS 64
int do_exec(int nargs, char **args)
{
pid_t pid;
int status, i, j;
char *par[MAX_PARAMETERS];
if (nargs > MAX_PARAMETERS)
{
return -1;
}
for(i=0, j=1; i<(nargs-1) ;i++,j++)
{
par[i] = args[j];
}
par[i] = (char*)0;
pid = fork();
if (!pid)
{
execv(par[0],par);
}
else
{
while(wait(&status)!=pid);
}
return 0;
}
int do_export(int nargs, char **args)
{
add_environment(args[1], args[2]);
return 0;
}
int do_hostname(int nargs, char **args)
{
return write_file("/proc/sys/kernel/hostname", args[1]);
}
int do_ifup(int nargs, char **args)
{
return __ifupdown(args[1], 1);
}
static int do_insmod_inner(int nargs, char **args, int opt_len)
{
char options[opt_len + 1];
int i;
options[0] = '\0';
if (nargs > 2) {
strcpy(options, args[2]);
for (i = 3; i < nargs; ++i) {
strcat(options, " ");
strcat(options, args[i]);
}
}
return insmod(args[1], options);
}
int do_insmod(int nargs, char **args)
{
int i;
int size = 0;
if (nargs > 2) {
for (i = 2; i < nargs; ++i)
size += strlen(args[i]) + 1;
}
return do_insmod_inner(nargs, args, size);
}
int do_import(int nargs, char **args)
{
return init_parse_config_file(args[1]);
}
int do_mkdir(int nargs, char **args)
{
mode_t mode = 0755;
/* mkdir <path> [mode] [owner] [group] */
if (nargs >= 3) {
mode = strtoul(args[2], 0, 8);
}
if (mkdir(args[1], mode)) {
return -errno;
}
if (nargs >= 4) {
uid_t uid = decode_uid(args[3]);
gid_t gid = -1;
if (nargs == 5) {
gid = decode_uid(args[4]);
}
if (chown(args[1], uid, gid)) {
return -errno;
}
}
return 0;
}
static struct {
const char *name;
unsigned flag;
} mount_flags[] = {
{ "move", MS_MOVE },
{ "noatime", MS_NOATIME },
{ "nosuid", MS_NOSUID },
{ "nodev", MS_NODEV },
{ "nodiratime", MS_NODIRATIME },
{ "ro", MS_RDONLY },
{ "rw", 0 },
{ "remount", MS_REMOUNT },
{ "defaults", 0 },
{ 0, 0 },
};
/* mount <type> <device> <path> <flags ...> <options> */
int do_mount(int nargs, char **args)
{
char tmp[64];
char *source, *target, *system;
char *options = NULL;
unsigned flags = 0;
int n, i;
int wait = 0;
for (n = 4; n < nargs; n++) {
for (i = 0; mount_flags[i].name; i++) {
if (!strcmp(args[n], mount_flags[i].name)) {
flags |= mount_flags[i].flag;
break;
}
}
if (!mount_flags[i].name) {
if (!strcmp(args[n], "wait"))
wait = 1;
/* if our last argument isn't a flag, wolf it up as an option string */
else if (n + 1 == nargs)
options = args[n];
}
}
system = args[1];
source = args[2];
target = args[3];
if (!strncmp(source, "mtd@", 4)) {
n = mtd_name_to_number(source + 4);
if (n < 0) {
return -1;
}
sprintf(tmp, "/dev/block/mtdblock%d", n);
if (wait)
wait_for_file(tmp, COMMAND_RETRY_TIMEOUT);
if (mount(tmp, target, system, flags, options) < 0) {
return -1;
}
return 0;
} else if (!strncmp(source, "loop@", 5)) {
int mode, loop, fd;
struct loop_info info;
mode = (flags & MS_RDONLY) ? O_RDONLY : O_RDWR;
fd = open(source + 5, mode);
if (fd < 0) {
return -1;
}
for (n = 0; ; n++) {
sprintf(tmp, "/dev/block/loop%d", n);
loop = open(tmp, mode);
if (loop < 0) {
return -1;
}
/* if it is a blank loop device */
if (ioctl(loop, LOOP_GET_STATUS, &info) < 0 && errno == ENXIO) {
/* if it becomes our loop device */
if (ioctl(loop, LOOP_SET_FD, fd) >= 0) {
close(fd);
if (mount(tmp, target, system, flags, options) < 0) {
ioctl(loop, LOOP_CLR_FD, 0);
close(loop);
return -1;
}
close(loop);
return 0;
}
}
close(loop);
}
close(fd);
ERROR("out of loopback devices");
return -1;
} else {
if (wait)
wait_for_file(source, COMMAND_RETRY_TIMEOUT);
if (mount(source, target, system, flags, options) < 0) {
return -1;
}
return 0;
}
}
int do_setkey(int nargs, char **args)
{
struct kbentry kbe;
kbe.kb_table = strtoul(args[1], 0, 0);
kbe.kb_index = strtoul(args[2], 0, 0);
kbe.kb_value = strtoul(args[3], 0, 0);
return setkey(&kbe);
}
int do_setprop(int nargs, char **args)
{
property_set(args[1], args[2]);
return 0;
}
int do_setrlimit(int nargs, char **args)
{
struct rlimit limit;
int resource;
resource = atoi(args[1]);
limit.rlim_cur = atoi(args[2]);
limit.rlim_max = atoi(args[3]);
return setrlimit(resource, &limit);
}
int do_start(int nargs, char **args)
{
struct service *svc;
svc = service_find_by_name(args[1]);
if (svc) {
service_start(svc, NULL);
}
return 0;
}
int do_stop(int nargs, char **args)
{
struct service *svc;
svc = service_find_by_name(args[1]);
if (svc) {
service_stop(svc);
}
return 0;
}
int do_restart(int nargs, char **args)
{
struct service *svc;
svc = service_find_by_name(args[1]);
if (svc) {
service_stop(svc);
service_start(svc, NULL);
}
return 0;
}
int do_trigger(int nargs, char **args)
{
action_for_each_trigger(args[1], action_add_queue_tail);
return 0;
}
int do_symlink(int nargs, char **args)
{
return symlink(args[1], args[2]);
}
int do_sysclktz(int nargs, char **args)
{
struct timezone tz;
if (nargs != 2)
return -1;
memset(&tz, 0, sizeof(tz));
tz.tz_minuteswest = atoi(args[1]);
if (settimeofday(NULL, &tz))
return -1;
return 0;
}
int do_write(int nargs, char **args)
{
return write_file(args[1], args[2]);
}
int do_copy(int nargs, char **args)
{
char *buffer = NULL;
int rc = 0;
int fd1 = -1, fd2 = -1;
struct stat info;
int brtw, brtr;
char *p;
if (nargs != 3)
return -1;
if (stat(args[1], &info) < 0)
return -1;
if ((fd1 = open(args[1], O_RDONLY)) < 0)
goto out_err;
if ((fd2 = open(args[2], O_WRONLY|O_CREAT|O_TRUNC, 0660)) < 0)
goto out_err;
if (!(buffer = malloc(info.st_size)))
goto out_err;
p = buffer;
brtr = info.st_size;
while(brtr) {
rc = read(fd1, p, brtr);
if (rc < 0)
goto out_err;
if (rc == 0)
break;
p += rc;
brtr -= rc;
}
p = buffer;
brtw = info.st_size;
while(brtw) {
rc = write(fd2, p, brtw);
if (rc < 0)
goto out_err;
if (rc == 0)
break;
p += rc;
brtw -= rc;
}
rc = 0;
goto out;
out_err:
rc = -1;
out:
if (buffer)
free(buffer);
if (fd1 >= 0)
close(fd1);
if (fd2 >= 0)
close(fd2);
return rc;
}
int do_chown(int nargs, char **args) {
/* GID is optional. */
if (nargs == 3) {
if (chown(args[2], decode_uid(args[1]), -1) < 0)
return -errno;
} else if (nargs == 4) {
if (chown(args[3], decode_uid(args[1]), decode_uid(args[2])))
return -errno;
} else {
return -1;
}
return 0;
}
static mode_t get_mode(const char *s) {
mode_t mode = 0;
while (*s) {
if (*s >= '0' && *s <= '7') {
mode = (mode<<3) | (*s-'0');
} else {
return -1;
}
s++;
}
return mode;
}
int do_chmod(int nargs, char **args) {
mode_t mode = get_mode(args[1]);
if (chmod(args[2], mode) < 0) {
return -errno;
}
return 0;
}
int do_loglevel(int nargs, char **args) {
if (nargs == 2) {
log_set_level(atoi(args[1]));
return 0;
}
return -1;
}
int do_wait(int nargs, char **args)
{
if (nargs == 2) {
return wait_for_file(args[1], COMMAND_RETRY_TIMEOUT);
}
return -1;
}
system/core/init/devices.c
+721
View File
@@ -0,0 +1,721 @@
/*
* ncr
* Copyright (C) 2007 The Android Open Source Project
* Copyright (c) 2009, The Linux Foundation. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <linux/netlink.h>
#include <private/android_filesystem_config.h>
#include <sys/time.h>
#include <asm/page.h>
#include <sys/wait.h>
#include "devices.h"
#include "util.h"
#include "log.h"
#include "list.h"
#define SYSFS_PREFIX "/sys"
#define FIRMWARE_DIR1 "/etc/firmware"
#define FIRMWARE_DIR2 "/vendor/firmware"
static int device_fd = -1;
struct uevent {
const char *action;
const char *path;
const char *subsystem;
const char *firmware;
const char *partition_name;
int partition_num;
int major;
int minor;
};
static int open_uevent_socket(void)
{
struct sockaddr_nl addr;
int sz = 64*1024; // XXX larger? udev uses 16MB!
int on = 1;
int s;
memset(&addr, 0, sizeof(addr));
addr.nl_family = AF_NETLINK;
addr.nl_pid = getpid();
addr.nl_groups = 0xffffffff;
s = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_KOBJECT_UEVENT);
if(s < 0)
return -1;
setsockopt(s, SOL_SOCKET, SO_RCVBUFFORCE, &sz, sizeof(sz));
setsockopt(s, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
if(bind(s, (struct sockaddr *) &addr, sizeof(addr)) < 0) {
close(s);
return -1;
}
return s;
}
struct perms_ {
char *name;
char *attr;
mode_t perm;
unsigned int uid;
unsigned int gid;
unsigned short prefix;
};
struct perm_node {
struct perms_ dp;
struct listnode plist;
};
static list_declare(sys_perms);
static list_declare(dev_perms);
int add_dev_perms(const char *name, const char *attr,
mode_t perm, unsigned int uid, unsigned int gid,
unsigned short prefix) {
struct perm_node *node = calloc(1, sizeof(*node));
if (!node)
return -ENOMEM;
node->dp.name = strdup(name);
if (!node->dp.name)
return -ENOMEM;
if (attr) {
node->dp.attr = strdup(attr);
if (!node->dp.attr)
return -ENOMEM;
}
node->dp.perm = perm;
node->dp.uid = uid;
node->dp.gid = gid;
node->dp.prefix = prefix;
if (attr)
list_add_tail(&sys_perms, &node->plist);
else
list_add_tail(&dev_perms, &node->plist);
return 0;
}
void fixup_sys_perms(const char *upath)
{
char buf[512];
struct listnode *node;
struct perms_ *dp;
/* upaths omit the "/sys" that paths in this list
* contain, so we add 4 when comparing...
*/
list_for_each(node, &sys_perms) {
dp = &(node_to_item(node, struct perm_node, plist))->dp;
if (dp->prefix) {
if (strncmp(upath, dp->name + 4, strlen(dp->name + 4)))
continue;
} else {
if (strcmp(upath, dp->name + 4))
continue;
}
if ((strlen(upath) + strlen(dp->attr) + 6) > sizeof(buf))
return;
sprintf(buf,"/sys%s/%s", upath, dp->attr);
INFO("fixup %s %d %d 0%o\n", buf, dp->uid, dp->gid, dp->perm);
chown(buf, dp->uid, dp->gid);
chmod(buf, dp->perm);
}
}
static mode_t get_device_perm(const char *path, unsigned *uid, unsigned *gid)
{
mode_t perm;
struct listnode *node;
struct perm_node *perm_node;
struct perms_ *dp;
/* search the perms list in reverse so that ueventd.$hardware can
* override ueventd.rc
*/
list_for_each_reverse(node, &dev_perms) {
perm_node = node_to_item(node, struct perm_node, plist);
dp = &perm_node->dp;
if (dp->prefix) {
if (strncmp(path, dp->name, strlen(dp->name)))
continue;
} else {
if (strcmp(path, dp->name))
continue;
}
*uid = dp->uid;
*gid = dp->gid;
return dp->perm;
}
/* Default if nothing found. */
*uid = 0;
*gid = 0;
return 0600;
}
static void make_device(const char *path,
const char *upath,
int block, int major, int minor)
{
unsigned uid;
unsigned gid;
mode_t mode;
dev_t dev;
mode = get_device_perm(path, &uid, &gid) | (block ? S_IFBLK : S_IFCHR);
dev = makedev(major, minor);
/* Temporarily change egid to avoid race condition setting the gid of the
* device node. Unforunately changing the euid would prevent creation of
* some device nodes, so the uid has to be set with chown() and is still
* racy. Fixing the gid race at least fixed the issue with system_server
* opening dynamic input devices under the AID_INPUT gid. */
setegid(gid);
mknod(path, mode, dev);
chown(path, uid, -1);
setegid(AID_ROOT);
}
#if LOG_UEVENTS
static inline suseconds_t get_usecs(void)
{
struct timeval tv;
gettimeofday(&tv, 0);
return tv.tv_sec * (suseconds_t) 1000000 + tv.tv_usec;
}
#define log_event_print(x...) INFO(x)
#else
#define log_event_print(fmt, args...) do { } while (0)
#define get_usecs() 0
#endif
static void parse_event(const char *msg, struct uevent *uevent)
{
uevent->action = "";
uevent->path = "";
uevent->subsystem = "";
uevent->firmware = "";
uevent->major = -1;
uevent->minor = -1;
uevent->partition_name = NULL;
uevent->partition_num = -1;
/* currently ignoring SEQNUM */
while(*msg) {
if(!strncmp(msg, "ACTION=", 7)) {
msg += 7;
uevent->action = msg;
} else if(!strncmp(msg, "DEVPATH=", 8)) {
msg += 8;
uevent->path = msg;
} else if(!strncmp(msg, "SUBSYSTEM=", 10)) {
msg += 10;
uevent->subsystem = msg;
} else if(!strncmp(msg, "FIRMWARE=", 9)) {
msg += 9;
uevent->firmware = msg;
} else if(!strncmp(msg, "MAJOR=", 6)) {
msg += 6;
uevent->major = atoi(msg);
} else if(!strncmp(msg, "MINOR=", 6)) {
msg += 6;
uevent->minor = atoi(msg);
} else if(!strncmp(msg, "PARTN=", 6)) {
msg += 6;
uevent->partition_num = atoi(msg);
} else if(!strncmp(msg, "PARTNAME=", 9)) {
msg += 9;
uevent->partition_name = msg;
}
/* advance to after the next \0 */
while(*msg++)
;
}
log_event_print("event { '%s', '%s', '%s', '%s', %d, %d }\n",
uevent->action, uevent->path, uevent->subsystem,
uevent->firmware, uevent->major, uevent->minor);
}
static char **parse_platform_block_device(struct uevent *uevent)
{
const char *driver;
const char *path;
char *slash;
int width;
char buf[256];
char link_path[256];
int fd;
int link_num = 0;
int ret;
char *p;
unsigned int size;
struct stat info;
char **links = malloc(sizeof(char *) * 4);
if (!links)
return NULL;
memset(links, 0, sizeof(char *) * 4);
/* Drop "/devices/platform/" */
path = uevent->path;
driver = path + 18;
slash = strchr(driver, '/');
if (!slash)
goto err;
width = slash - driver;
if (width <= 0)
goto err;
snprintf(link_path, sizeof(link_path), "/dev/block/platform/%.*s",
width, driver);
if (uevent->partition_name) {
p = strdup(uevent->partition_name);
sanitize(p);
if (asprintf(&links[link_num], "%s/by-name/%s", link_path, p) > 0)
link_num++;
else
links[link_num] = NULL;
free(p);
}
if (uevent->partition_num >= 0) {
if (asprintf(&links[link_num], "%s/by-num/p%d", link_path, uevent->partition_num) > 0)
link_num++;
else
links[link_num] = NULL;
}
slash = strrchr(path, '/');
if (asprintf(&links[link_num], "%s/%s", link_path, slash + 1) > 0)
link_num++;
else
links[link_num] = NULL;
return links;
err:
free(links);
return NULL;
}
static void handle_device_event(struct uevent *uevent)
{
char devpath[96];
int devpath_ready = 0;
char *base, *name;
char **links = NULL;
int block;
int i;
if (!strcmp(uevent->action,"add"))
fixup_sys_perms(uevent->path);
/* if it's not a /dev device, nothing else to do */
if((uevent->major < 0) || (uevent->minor < 0))
return;
/* do we have a name? */
name = strrchr(uevent->path, '/');
if(!name)
return;
name++;
/* too-long names would overrun our buffer */
if(strlen(name) > 64)
return;
/* are we block or char? where should we live? */
if(!strncmp(uevent->subsystem, "block", 5)) {
block = 1;
base = "/dev/block/";
mkdir(base, 0755);
if (!strncmp(uevent->path, "/devices/platform/", 18))
links = parse_platform_block_device(uevent);
} else {
block = 0;
/* this should probably be configurable somehow */
if (!strncmp(uevent->subsystem, "usb", 3)) {
if (!strcmp(uevent->subsystem, "usb")) {
/* This imitates the file system that would be created
* if we were using devfs instead.
* Minors are broken up into groups of 128, starting at "001"
*/
int bus_id = uevent->minor / 128 + 1;
int device_id = uevent->minor % 128 + 1;
/* build directories */
mkdir("/dev/bus", 0755);
mkdir("/dev/bus/usb", 0755);
snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d", bus_id);
mkdir(devpath, 0755);
snprintf(devpath, sizeof(devpath), "/dev/bus/usb/%03d/%03d", bus_id, device_id);
devpath_ready = 1;
} else {
/* ignore other USB events */
return;
}
} else if (!strncmp(uevent->subsystem, "graphics", 8)) {
base = "/dev/graphics/";
mkdir(base, 0755);
} else if (!strncmp(uevent->subsystem, "oncrpc", 6)) {
base = "/dev/oncrpc/";
mkdir(base, 0755);
} else if (!strncmp(uevent->subsystem, "adsp", 4)) {
base = "/dev/adsp/";
mkdir(base, 0755);
} else if (!strncmp(uevent->subsystem, "msm_camera", 10)) {
base = "/dev/msm_camera/";
mkdir(base, 0755);
} else if(!strncmp(uevent->subsystem, "input", 5)) {
base = "/dev/input/";
mkdir(base, 0755);
} else if(!strncmp(uevent->subsystem, "mtd", 3)) {
base = "/dev/mtd/";
mkdir(base, 0755);
} else if(!strncmp(uevent->subsystem, "sound", 5)) {
base = "/dev/snd/";
mkdir(base, 0755);
} else if(!strncmp(uevent->subsystem, "misc", 4) &&
!strncmp(name, "log_", 4)) {
base = "/dev/log/";
mkdir(base, 0755);
name += 4;
} else
base = "/dev/";
}
if (!devpath_ready)
snprintf(devpath, sizeof(devpath), "%s%s", base, name);
if(!strcmp(uevent->action, "add")) {
make_device(devpath, uevent->path, block, uevent->major, uevent->minor);
if (links) {
for (i = 0; links[i]; i++)
make_link(devpath, links[i]);
}
}
if(!strcmp(uevent->action, "remove")) {
if (links) {
for (i = 0; links[i]; i++)
remove_link(devpath, links[i]);
}
unlink(devpath);
}
if (links) {
for (i = 0; links[i]; i++)
free(links[i]);
free(links);
}
}
static int load_firmware(int fw_fd, int loading_fd, int data_fd)
{
struct stat st;
long len_to_copy;
int ret = 0;
if(fstat(fw_fd, &st) < 0)
return -1;
len_to_copy = st.st_size;
while (len_to_copy > 0) {
char buf[PAGE_SIZE];
ssize_t nr;
nr = read(fw_fd, buf, sizeof(buf));
if(!nr)
break;
if(nr < 0) {
ret = -1;
break;
}
len_to_copy -= nr;
while (nr > 0) {
ssize_t nw = 0;
nw = write(data_fd, buf + nw, nr);
if(nw <= 0) {
ret = -1;
goto out;
}
nr -= nw;
}
}
out:
return ret;
}
static void process_firmware_event(struct uevent *uevent)
{
char *root, *loading, *data, *file1 = NULL, *file2 = NULL;
int l, loading_fd, data_fd, fw_fd;
log_event_print("firmware event { '%s', '%s' }\n",
uevent->path, uevent->firmware);
l = asprintf(&root, SYSFS_PREFIX"%s/", uevent->path);
if (l == -1)
return;
l = asprintf(&loading, "%sloading", root);
if (l == -1)
goto root_free_out;
l = asprintf(&data, "%sdata", root);
if (l == -1)
goto loading_free_out;
l = asprintf(&file1, FIRMWARE_DIR1"/%s", uevent->firmware);
if (l == -1)
goto data_free_out;
l = asprintf(&file2, FIRMWARE_DIR2"/%s", uevent->firmware);
if (l == -1)
goto data_free_out;
loading_fd = open(loading, O_WRONLY);
if(loading_fd < 0)
goto file_free_out;
write(loading_fd, "1", 1); /* start transfer */
data_fd = open(data, O_WRONLY);
if(data_fd < 0) {
write(loading_fd, "-1", 2); /* abort transfer */
goto loading_close_out;
}
fw_fd = open(file1, O_RDONLY);
if(fw_fd < 0) {
fw_fd = open(file2, O_RDONLY);
if(fw_fd < 0) {
write(loading_fd, "-1", 2); /* abort transfer */
goto data_close_out;
}
}
if(!load_firmware(fw_fd, loading_fd, data_fd)) {
write(loading_fd, "0", 1); /* successful end of transfer */
log_event_print("firmware copy success { '%s', '%s' }\n", root, uevent->firmware);
} else {
write(loading_fd, "-1", 2); /* abort transfer */
log_event_print("firmware copy failure { '%s', '%s' }\n", root, uevent->firmware);
}
close(fw_fd);
data_close_out:
close(data_fd);
loading_close_out:
close(loading_fd);
file_free_out:
free(file1);
free(file2);
data_free_out:
free(data);
loading_free_out:
free(loading);
root_free_out:
free(root);
}
static void handle_firmware_event(struct uevent *uevent)
{
pid_t pid;
int status;
int ret;
if(strcmp(uevent->subsystem, "firmware"))
return;
if(strcmp(uevent->action, "add"))
return;
/* we fork, to avoid making large memory allocations in init proper */
pid = fork();
if (!pid) {
process_firmware_event(uevent);
exit(EXIT_SUCCESS);
} else {
do {
ret = waitpid(pid, &status, 0);
} while (ret == -1 && errno == EINTR);
}
}
#define UEVENT_MSG_LEN 1024
void handle_device_fd()
{
for(;;) {
char msg[UEVENT_MSG_LEN+2];
char cred_msg[CMSG_SPACE(sizeof(struct ucred))];
struct iovec iov = {msg, sizeof(msg)};
struct sockaddr_nl snl;
struct msghdr hdr = {&snl, sizeof(snl), &iov, 1, cred_msg, sizeof(cred_msg), 0};
ssize_t n = recvmsg(device_fd, &hdr, 0);
if (n <= 0) {
break;
}
if ((snl.nl_groups != 1) || (snl.nl_pid != 0)) {
/* ignoring non-kernel netlink multicast message */
continue;
}
struct cmsghdr * cmsg = CMSG_FIRSTHDR(&hdr);
if (cmsg == NULL || cmsg->cmsg_type != SCM_CREDENTIALS) {
/* no sender credentials received, ignore message */
continue;
}
struct ucred * cred = (struct ucred *)CMSG_DATA(cmsg);
if (cred->uid != 0) {
/* message from non-root user, ignore */
continue;
}
if(n >= UEVENT_MSG_LEN) /* overflow -- discard */
continue;
msg[n] = '\0';
msg[n+1] = '\0';
struct uevent uevent;
parse_event(msg, &uevent);
handle_device_event(&uevent);
handle_firmware_event(&uevent);
}
}
/* Coldboot walks parts of the /sys tree and pokes the uevent files
** to cause the kernel to regenerate device add events that happened
** before init's device manager was started
**
** We drain any pending events from the netlink socket every time
** we poke another uevent file to make sure we don't overrun the
** socket's buffer.
*/
static void do_coldboot(DIR *d)
{
struct dirent *de;
int dfd, fd;
dfd = dirfd(d);
fd = openat(dfd, "uevent", O_WRONLY);
if(fd >= 0) {
write(fd, "add\n", 4);
close(fd);
handle_device_fd();
}
while((de = readdir(d))) {
DIR *d2;
if(de->d_type != DT_DIR || de->d_name[0] == '.')
continue;
fd = openat(dfd, de->d_name, O_RDONLY | O_DIRECTORY);
if(fd < 0)
continue;
d2 = fdopendir(fd);
if(d2 == 0)
close(fd);
else {
do_coldboot(d2);
closedir(d2);
}
}
}
static void coldboot(const char *path)
{
DIR *d = opendir(path);
if(d) {
do_coldboot(d);
closedir(d);
}
}
void device_init(void)
{
suseconds_t t0, t1;
struct stat info;
int fd;
device_fd = open_uevent_socket();
if(device_fd < 0)
return;
fcntl(device_fd, F_SETFD, FD_CLOEXEC);
fcntl(device_fd, F_SETFL, O_NONBLOCK);
if (stat(coldboot_done, &info) < 0) {
t0 = get_usecs();
coldboot("/sys/class");
coldboot("/sys/block");
coldboot("/sys/devices");
t1 = get_usecs();
fd = open(coldboot_done, O_WRONLY|O_CREAT, 0000);
close(fd);
log_event_print("coldboot %ld uS\n", ((long) (t1 - t0)));
} else {
log_event_print("skipping coldboot, already done\n");
}
}
int get_device_fd()
{
return device_fd;
}
system/core/init/devices.h
+28
View File
@@ -0,0 +1,28 @@
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_DEVICES_H
#define _INIT_DEVICES_H
#include <sys/stat.h>
extern void handle_device_fd();
extern void device_init(void);
extern int add_dev_perms(const char *name, const char *attr,
mode_t perm, unsigned int uid,
unsigned int gid, unsigned short prefix);
int get_device_fd();
#endif /* _INIT_DEVICES_H */
system/core/init/grab-bootchart.sh
Executable
+22
View File
@@ -0,0 +1,22 @@
#!/bin/sh
#
# this script is used to retrieve the bootchart log generated
# by init when compiled with INIT_BOOTCHART=true.
#
# for all details, see //device/system/init/README.BOOTCHART
#
TMPDIR=/tmp/android-bootchart
rm -rf $TMPDIR
mkdir -p $TMPDIR
LOGROOT=/data/bootchart
TARBALL=bootchart.tgz
FILES="header proc_stat.log proc_ps.log proc_diskstats.log kernel_pacct"
for f in $FILES; do
adb pull $LOGROOT/$f $TMPDIR/$f 2>&1 > /dev/null
done
(cd $TMPDIR && tar -czf $TARBALL $FILES)
cp -f $TMPDIR/$TARBALL ./$TARBALL
echo "look at $TARBALL"
system/core/init/init.c
Executable
+816
View File
@@ -0,0 +1,816 @@
/*
* Copyright (C) 2008 The Android Open Source Project
* Copyright (c) 2009, The Linux Foundation. All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <signal.h>
#include <sys/wait.h>
#include <sys/mount.h>
#include <sys/stat.h>
#include <sys/poll.h>
#include <errno.h>
#include <stdarg.h>
#include <mtd/mtd-user.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <libgen.h>
#include <cutils/sockets.h>
#include <cutils/iosched_policy.h>
#include <private/android_filesystem_config.h>
#include <termios.h>
#include <sys/system_properties.h>
#include "devices.h"
#include "init.h"
#include "list.h"
#include "log.h"
#include "property_service.h"
#include "bootchart.h"
#include "signal_handler.h"
#include "keychords.h"
#include "init_parser.h"
#include "util.h"
#include "ueventd.h"
static int property_triggers_enabled = 0;
#if BOOTCHART
static int bootchart_count;
#endif
static char console[32];
static char serialno[32];
static char bootmode[32];
static char baseband[32];
static char carrier[32];
static char bootloader[32];
static char hardware[32];
static unsigned revision = 0;
static char qemu[32];
static struct action *cur_action = NULL;
static struct command *cur_command = NULL;
static struct listnode *command_queue = NULL;
void notify_service_state(const char *name, const char *state)
{
char pname[PROP_NAME_MAX];
int len = strlen(name);
if ((len + 10) > PROP_NAME_MAX)
return;
snprintf(pname, sizeof(pname), "init.svc.%s", name);
property_set(pname, state);
}
static int have_console;
static char *console_name = "/dev/console";
static time_t process_needs_restart;
static const char *ENV[32];
static unsigned emmc_boot = 0;
/* add_environment - add "key=value" to the current environment */
int add_environment(const char *key, const char *val)
{
int n;
for (n = 0; n < 31; n++) {
if (!ENV[n]) {
size_t len = strlen(key) + strlen(val) + 2;
char *entry = malloc(len);
snprintf(entry, len, "%s=%s", key, val);
ENV[n] = entry;
return 0;
}
}
return 1;
}
static void zap_stdio(void)
{
int fd;
fd = open("/dev/null", O_RDWR);
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
}
static void open_console()
{
int fd;
if ((fd = open(console_name, O_RDWR)) < 0) {
fd = open("/dev/null", O_RDWR);
}
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
close(fd);
}
static void publish_socket(const char *name, int fd)
{
char key[64] = ANDROID_SOCKET_ENV_PREFIX;
char val[64];
strlcpy(key + sizeof(ANDROID_SOCKET_ENV_PREFIX) - 1,
name,
sizeof(key) - sizeof(ANDROID_SOCKET_ENV_PREFIX));
snprintf(val, sizeof(val), "%d", fd);
add_environment(key, val);
/* make sure we don't close-on-exec */
fcntl(fd, F_SETFD, 0);
}
void service_start(struct service *svc, const char *dynamic_args)
{
struct stat s;
pid_t pid;
int needs_console;
int n;
/* starting a service removes it from the disabled
* state and immediately takes it out of the restarting
* state if it was in there
*/
svc->flags &= (~(SVC_DISABLED|SVC_RESTARTING));
svc->time_started = 0;
/* running processes require no additional work -- if
* they're in the process of exiting, we've ensured
* that they will immediately restart on exit, unless
* they are ONESHOT
*/
if (svc->flags & SVC_RUNNING) {
return;
}
needs_console = (svc->flags & SVC_CONSOLE) ? 1 : 0;
if (needs_console && (!have_console)) {
ERROR("service '%s' requires console\n", svc->name);
svc->flags |= SVC_DISABLED;
return;
}
if (stat(svc->args[0], &s) != 0) {
ERROR("cannot find '%s', disabling '%s'\n", svc->args[0], svc->name);
svc->flags |= SVC_DISABLED;
return;
}
if ((!(svc->flags & SVC_ONESHOT)) && dynamic_args) {
ERROR("service '%s' must be one-shot to use dynamic args, disabling\n",
svc->args[0]);
svc->flags |= SVC_DISABLED;
return;
}
NOTICE("starting '%s'\n", svc->name);
pid = fork();
if (pid == 0) {
struct socketinfo *si;
struct svcenvinfo *ei;
char tmp[32];
int fd, sz;
if (properties_inited()) {
get_property_workspace(&fd, &sz);
sprintf(tmp, "%d,%d", dup(fd), sz);
add_environment("ANDROID_PROPERTY_WORKSPACE", tmp);
}
for (ei = svc->envvars; ei; ei = ei->next)
add_environment(ei->name, ei->value);
for (si = svc->sockets; si; si = si->next) {
int socket_type = (
!strcmp(si->type, "stream") ? SOCK_STREAM :
(!strcmp(si->type, "dgram") ? SOCK_DGRAM : SOCK_SEQPACKET));
int s = create_socket(si->name, socket_type,
si->perm, si->uid, si->gid);
if (s >= 0) {
publish_socket(si->name, s);
}
}
if (svc->ioprio_class != IoSchedClass_NONE) {
if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
}
}
if (needs_console) {
setsid();
open_console();
} else {
zap_stdio();
}
#if 0
for (n = 0; svc->args[n]; n++) {
INFO("args[%d] = '%s'\n", n, svc->args[n]);
}
for (n = 0; ENV[n]; n++) {
INFO("env[%d] = '%s'\n", n, ENV[n]);
}
#endif
setpgid(0, getpid());
/* as requested, set our gid, supplemental gids, and uid */
if (svc->gid) {
setgid(svc->gid);
}
if (svc->nr_supp_gids) {
setgroups(svc->nr_supp_gids, svc->supp_gids);
}
if (svc->uid) {
setuid(svc->uid);
}
if (!dynamic_args) {
if (execve(svc->args[0], (char**) svc->args, (char**) ENV) < 0) {
ERROR("cannot execve('%s'): %s\n", svc->args[0], strerror(errno));
}
} else {
char *arg_ptrs[INIT_PARSER_MAXARGS+1];
int arg_idx = svc->nargs;
char *tmp = strdup(dynamic_args);
char *next = tmp;
char *bword;
/* Copy the static arguments */
memcpy(arg_ptrs, svc->args, (svc->nargs * sizeof(char *)));
while((bword = strsep(&next, " "))) {
arg_ptrs[arg_idx++] = bword;
if (arg_idx == INIT_PARSER_MAXARGS)
break;
}
arg_ptrs[arg_idx] = '\0';
execve(svc->args[0], (char**) arg_ptrs, (char**) ENV);
}
_exit(127);
}
if (pid < 0) {
ERROR("failed to start '%s'\n", svc->name);
svc->pid = 0;
return;
}
svc->time_started = gettime();
svc->pid = pid;
svc->flags |= SVC_RUNNING;
if (properties_inited())
notify_service_state(svc->name, "running");
}
void service_stop(struct service *svc)
{
/* we are no longer running, nor should we
* attempt to restart
*/
svc->flags &= (~(SVC_RUNNING|SVC_RESTARTING));
/* if the service has not yet started, prevent
* it from auto-starting with its class
*/
svc->flags |= SVC_DISABLED;
if (svc->pid) {
NOTICE("service '%s' is being killed\n", svc->name);
kill(-svc->pid, SIGTERM);
notify_service_state(svc->name, "stopping");
} else {
notify_service_state(svc->name, "stopped");
}
}
void property_changed(const char *name, const char *value)
{
if (property_triggers_enabled)
queue_property_triggers(name, value);
}
static void restart_service_if_needed(struct service *svc)
{
time_t next_start_time = svc->time_started + 5;
if (next_start_time <= gettime()) {
svc->flags &= (~SVC_RESTARTING);
service_start(svc, NULL);
return;
}
if ((next_start_time < process_needs_restart) ||
(process_needs_restart == 0)) {
process_needs_restart = next_start_time;
}
}
static void restart_processes()
{
process_needs_restart = 0;
service_for_each_flags(SVC_RESTARTING,
restart_service_if_needed);
}
static void msg_start(const char *name)
{
struct service *svc;
char *tmp = NULL;
char *args = NULL;
if (!strchr(name, ':'))
svc = service_find_by_name(name);
else {
tmp = strdup(name);
args = strchr(tmp, ':');
*args = '\0';
args++;
svc = service_find_by_name(tmp);
}
if (svc) {
service_start(svc, args);
} else {
ERROR("no such service '%s'\n", name);
}
if (tmp)
free(tmp);
}
static void msg_stop(const char *name)
{
struct service *svc = service_find_by_name(name);
if (svc) {
service_stop(svc);
} else {
ERROR("no such service '%s'\n", name);
}
}
void handle_control_message(const char *msg, const char *arg)
{
if (!strcmp(msg,"start")) {
msg_start(arg);
} else if (!strcmp(msg,"stop")) {
msg_stop(arg);
} else {
ERROR("unknown control msg '%s'\n", msg);
}
}
static void import_kernel_nv(char *name, int in_qemu)
{
char *value = strchr(name, '=');
if (value == 0) return;
*value++ = 0;
if (*name == 0) return;
if (!in_qemu)
{
/* on a real device, white-list the kernel options */
if (!strcmp(name,"qemu")) {
strlcpy(qemu, value, sizeof(qemu));
} else if (!strcmp(name,"androidboot.console")) {
strlcpy(console, value, sizeof(console));
} else if (!strcmp(name,"androidboot.mode")) {
strlcpy(bootmode, value, sizeof(bootmode));
} else if (!strcmp(name,"androidboot.serialno")) {
strlcpy(serialno, value, sizeof(serialno));
} else if (!strcmp(name,"androidboot.baseband")) {
strlcpy(baseband, value, sizeof(baseband));
} else if (!strcmp(name,"androidboot.carrier")) {
strlcpy(carrier, value, sizeof(carrier));
} else if (!strcmp(name,"androidboot.bootloader")) {
strlcpy(bootloader, value, sizeof(bootloader));
} else if (!strcmp(name,"androidboot.hardware")) {
strlcpy(hardware, value, sizeof(hardware));
} else if (!strcmp(name,"androidboot.emmc")) {
if (!strcmp(value,"true")) {
emmc_boot = 1;
}
}
} else {
/* in the emulator, export any kernel option with the
* ro.kernel. prefix */
char buff[32];
int len = snprintf( buff, sizeof(buff), "ro.kernel.%s", name );
if (len < (int)sizeof(buff)) {
property_set( buff, value );
}
}
}
static void import_kernel_cmdline(int in_qemu)
{
char cmdline[1024];
char *ptr;
int fd;
fd = open("/proc/cmdline", O_RDONLY);
if (fd >= 0) {
int n = read(fd, cmdline, 1023);
if (n < 0) n = 0;
/* get rid of trailing newline, it happens */
if (n > 0 && cmdline[n-1] == '\n') n--;
cmdline[n] = 0;
close(fd);
} else {
cmdline[0] = 0;
}
ptr = cmdline;
while (ptr && *ptr) {
char *x = strchr(ptr, ' ');
if (x != 0) *x++ = 0;
import_kernel_nv(ptr, in_qemu);
ptr = x;
}
chmod("/proc/cmdline", 0444);
}
static struct command *get_first_command(struct action *act)
{
struct listnode *node;
node = list_head(&act->commands);
if (!node)
return NULL;
return node_to_item(node, struct command, clist);
}
static struct command *get_next_command(struct action *act, struct command *cmd)
{
struct listnode *node;
node = cmd->clist.next;
if (!node)
return NULL;
if (node == &act->commands)
return NULL;
return node_to_item(node, struct command, clist);
}
static int is_last_command(struct action *act, struct command *cmd)
{
return (list_tail(&act->commands) == &cmd->clist);
}
void execute_one_command(void)
{
int ret;
if (!cur_action || !cur_command || is_last_command(cur_action, cur_command)) {
cur_action = action_remove_queue_head();
cur_command = NULL;
if (!cur_action)
return;
INFO("processing action %p (%s)\n", cur_action, cur_action->name);
cur_command = get_first_command(cur_action);
} else {
cur_command = get_next_command(cur_action, cur_command);
}
if (!cur_command)
return;
ret = cur_command->func(cur_command->nargs, cur_command->args);
INFO("command '%s' r=%d\n", cur_command->args[0], ret);
}
static int wait_for_coldboot_done_action(int nargs, char **args)
{
int ret;
INFO("wait for %s\n", coldboot_done);
ret = wait_for_file(coldboot_done, COMMAND_RETRY_TIMEOUT);
if (ret)
ERROR("Timed out waiting for %s\n", coldboot_done);
return ret;
}
static int property_init_action(int nargs, char **args)
{
INFO("property init\n");
property_init();
return 0;
}
static int keychord_init_action(int nargs, char **args)
{
keychord_init();
return 0;
}
static int console_init_action(int nargs, char **args)
{
int fd;
char tmp[PROP_VALUE_MAX];
if (console[0]) {
snprintf(tmp, sizeof(tmp), "/dev/%s", console);
console_name = strdup(tmp);
}
fd = open(console_name, O_RDWR);
if (fd >= 0)
have_console = 1;
close(fd);
if( load_565rle_image(INIT_IMAGE_FILE) ) {
fd = open("/dev/tty0", O_WRONLY);
if (fd >= 0) {
const char *msg;
msg = "\n"
"\n"
"\n"
"\n"
"\n"
"\n"
"\n" // console is 40 cols x 30 lines
"\n"
"\n"
"\n"
"\n"
"\n"
"\n"
"\n"
" A N D R O I D ";
write(fd, msg, strlen(msg));
close(fd);
}
}
return 0;
}
static int set_init_properties_action(int nargs, char **args)
{
char tmp[PROP_VALUE_MAX];
if (qemu[0])
import_kernel_cmdline(1);
if (!strcmp(bootmode,"factory"))
property_set("ro.factorytest", "1");
else if (!strcmp(bootmode,"factory2"))
property_set("ro.factorytest", "2");
else
property_set("ro.factorytest", "0");
property_set("ro.serialno", serialno[0] ? serialno : "");
property_set("ro.bootmode", bootmode[0] ? bootmode : "unknown");
property_set("ro.baseband", baseband[0] ? baseband : "unknown");
property_set("ro.carrier", carrier[0] ? carrier : "unknown");
property_set("ro.bootloader", bootloader[0] ? bootloader : "unknown");
property_set("ro.hardware", hardware);
snprintf(tmp, PROP_VALUE_MAX, "%d", revision);
property_set("ro.revision", tmp);
property_set("ro.emmc",emmc_boot ? "1" : "0");
return 0;
}
static int property_service_init_action(int nargs, char **args)
{
/* read any property files on system or data and
* fire up the property service. This must happen
* after the ro.foo properties are set above so
* that /data/local.prop cannot interfere with them.
*/
start_property_service();
return 0;
}
static int signal_init_action(int nargs, char **args)
{
signal_init();
return 0;
}
static int check_startup_action(int nargs, char **args)
{
/* make sure we actually have all the pieces we need */
if ((get_property_set_fd() < 0) ||
(get_signal_fd() < 0)) {
ERROR("init startup failure\n");
exit(1);
}
return 0;
}
static int queue_property_triggers_action(int nargs, char **args)
{
queue_all_property_triggers();
/* enable property triggers */
property_triggers_enabled = 1;
return 0;
}
#if BOOTCHART
static int bootchart_init_action(int nargs, char **args)
{
bootchart_count = bootchart_init();
if (bootchart_count < 0) {
ERROR("bootcharting init failure\n");
} else if (bootchart_count > 0) {
NOTICE("bootcharting started (period=%d ms)\n", bootchart_count*BOOTCHART_POLLING_MS);
} else {
NOTICE("bootcharting ignored\n");
}
}
#endif
int main(int argc, char **argv)
{
int fd_count = 0;
struct pollfd ufds[4];
char *tmpdev;
char* debuggable;
char tmp[32];
int property_set_fd_init = 0;
int signal_fd_init = 0;
int keychord_fd_init = 0;
if (!strcmp(basename(argv[0]), "ueventd"))
return ueventd_main(argc, argv);
/* clear the umask */
umask(0);
/* Get the basic filesystem setup we need put
* together in the initramdisk on / and then we'll
* let the rc file figure out the rest.
*/
mkdir("/dev", 0755);
mkdir("/proc", 0755);
mkdir("/sys", 0755);
mount("tmpfs", "/dev", "tmpfs", 0, "mode=0755");
mkdir("/dev/pts", 0755);
mkdir("/dev/socket", 0755);
mount("devpts", "/dev/pts", "devpts", 0, NULL);
mount("proc", "/proc", "proc", 0, NULL);
mount("sysfs", "/sys", "sysfs", 0, NULL);
/* We must have some place other than / to create the
* device nodes for kmsg and null, otherwise we won't
* be able to remount / read-only later on.
* Now that tmpfs is mounted on /dev, we can actually
* talk to the outside world.
*/
open_devnull_stdio();
log_init();
INFO("reading config file\n");
init_parse_config_file("/init.rc");
/* pull the kernel commandline and ramdisk properties file in */
import_kernel_cmdline(0);
get_hardware_name(hardware, &revision);
snprintf(tmp, sizeof(tmp), "/init.%s.rc", hardware);
init_parse_config_file(tmp);
/* Check for a target specific initialisation file and read if present */
if (access("/init.target.rc", R_OK) == 0) {
INFO("Reading target specific config file");
init_parse_config_file("/init.target.rc");
}
action_for_each_trigger("early-init", action_add_queue_tail);
queue_builtin_action(wait_for_coldboot_done_action, "wait_for_coldboot_done");
queue_builtin_action(property_init_action, "property_init");
queue_builtin_action(keychord_init_action, "keychord_init");
queue_builtin_action(console_init_action, "console_init");
queue_builtin_action(set_init_properties_action, "set_init_properties");
/* execute all the boot actions to get us started */
action_for_each_trigger("init", action_add_queue_tail);
action_for_each_trigger("early-fs", action_add_queue_tail);
if(emmc_boot) {
action_for_each_trigger("emmc-fs", action_add_queue_tail);
} else {
action_for_each_trigger("fs", action_add_queue_tail);
}
action_for_each_trigger("post-fs", action_add_queue_tail);
queue_builtin_action(property_service_init_action, "property_service_init");
queue_builtin_action(signal_init_action, "signal_init");
queue_builtin_action(check_startup_action, "check_startup");
/* execute all the boot actions to get us started */
action_for_each_trigger("early-boot", action_add_queue_tail);
action_for_each_trigger("boot", action_add_queue_tail);
/* run all property triggers based on current state of the properties */
queue_builtin_action(queue_property_triggers_action, "queue_propety_triggers");
#if BOOTCHART
queue_builtin_action(bootchart_init_action, "bootchart_init");
#endif
for(;;) {
int nr, i, timeout = -1;
execute_one_command();
restart_processes();
if (!property_set_fd_init && get_property_set_fd() > 0) {
ufds[fd_count].fd = get_property_set_fd();
ufds[fd_count].events = POLLIN;
ufds[fd_count].revents = 0;
fd_count++;
property_set_fd_init = 1;
}
if (!signal_fd_init && get_signal_fd() > 0) {
ufds[fd_count].fd = get_signal_fd();
ufds[fd_count].events = POLLIN;
ufds[fd_count].revents = 0;
fd_count++;
signal_fd_init = 1;
}
if (!keychord_fd_init && get_keychord_fd() > 0) {
ufds[fd_count].fd = get_keychord_fd();
ufds[fd_count].events = POLLIN;
ufds[fd_count].revents = 0;
fd_count++;
keychord_fd_init = 1;
}
if (process_needs_restart) {
timeout = (process_needs_restart - gettime()) * 1000;
if (timeout < 0)
timeout = 0;
}
if (!action_queue_empty() || cur_action)
timeout = 0;
#if BOOTCHART
if (bootchart_count > 0) {
if (timeout < 0 || timeout > BOOTCHART_POLLING_MS)
timeout = BOOTCHART_POLLING_MS;
if (bootchart_step() < 0 || --bootchart_count == 0) {
bootchart_finish();
bootchart_count = 0;
}
}
#endif
nr = poll(ufds, fd_count, timeout);
if (nr <= 0)
continue;
for (i = 0; i < fd_count; i++) {
if (ufds[i].revents == POLLIN) {
if (ufds[i].fd == get_property_set_fd())
handle_property_set_fd();
else if (ufds[i].fd == get_keychord_fd())
handle_keychord();
else if (ufds[i].fd == get_signal_fd())
handle_signal();
}
}
}
return 0;
}
system/core/init/init.h
+131
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@@ -0,0 +1,131 @@
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_INIT_H
#define _INIT_INIT_H
#include "list.h"
#include <sys/stat.h>
void handle_control_message(const char *msg, const char *arg);
struct command
{
/* list of commands in an action */
struct listnode clist;
int (*func)(int nargs, char **args);
int nargs;
char *args[1];
};
struct action {
/* node in list of all actions */
struct listnode alist;
/* node in the queue of pending actions */
struct listnode qlist;
/* node in list of actions for a trigger */
struct listnode tlist;
unsigned hash;
const char *name;
struct listnode commands;
struct command *current;
};
struct socketinfo {
struct socketinfo *next;
const char *name;
const char *type;
uid_t uid;
gid_t gid;
int perm;
};
struct svcenvinfo {
struct svcenvinfo *next;
const char *name;
const char *value;
};
#define SVC_DISABLED 0x01 /* do not autostart with class */
#define SVC_ONESHOT 0x02 /* do not restart on exit */
#define SVC_RUNNING 0x04 /* currently active */
#define SVC_RESTARTING 0x08 /* waiting to restart */
#define SVC_CONSOLE 0x10 /* requires console */
#define SVC_CRITICAL 0x20 /* will reboot into recovery if keeps crashing */
#define NR_SVC_SUPP_GIDS 12 /* twelve supplementary groups */
#define COMMAND_RETRY_TIMEOUT 5
struct service {
/* list of all services */
struct listnode slist;
const char *name;
const char *classname;
unsigned flags;
pid_t pid;
time_t time_started; /* time of last start */
time_t time_crashed; /* first crash within inspection window */
int nr_crashed; /* number of times crashed within window */
uid_t uid;
gid_t gid;
gid_t supp_gids[NR_SVC_SUPP_GIDS];
size_t nr_supp_gids;
struct socketinfo *sockets;
struct svcenvinfo *envvars;
struct action onrestart; /* Actions to execute on restart. */
/* keycodes for triggering this service via /dev/keychord */
int *keycodes;
int nkeycodes;
int keychord_id;
int ioprio_class;
int ioprio_pri;
int nargs;
/* "MUST BE AT THE END OF THE STRUCT" */
char *args[1];
}; /* ^-------'args' MUST be at the end of this struct! */
void notify_service_state(const char *name, const char *state);
struct service *service_find_by_name(const char *name);
struct service *service_find_by_pid(pid_t pid);
struct service *service_find_by_keychord(int keychord_id);
void service_for_each(void (*func)(struct service *svc));
void service_for_each_class(const char *classname,
void (*func)(struct service *svc));
void service_for_each_flags(unsigned matchflags,
void (*func)(struct service *svc));
void service_stop(struct service *svc);
void service_start(struct service *svc, const char *dynamic_args);
void property_changed(const char *name, const char *value);
#define INIT_IMAGE_FILE "/initlogo.rle"
int load_565rle_image( char *file_name );
#endif /* _INIT_INIT_H */
system/core/init/init_parser.c
+670
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@@ -0,0 +1,670 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdarg.h>
#include <string.h>
#include <stddef.h>
#include <ctype.h>
#include "init.h"
#include "parser.h"
#include "init_parser.h"
#include "log.h"
#include "list.h"
#include "property_service.h"
#include "util.h"
#include <cutils/iosched_policy.h>
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
static list_declare(service_list);
static list_declare(action_list);
static list_declare(action_queue);
static void *parse_service(struct parse_state *state, int nargs, char **args);
static void parse_line_service(struct parse_state *state, int nargs, char **args);
static void *parse_action(struct parse_state *state, int nargs, char **args);
static void parse_line_action(struct parse_state *state, int nargs, char **args);
#define SECTION 0x01
#define COMMAND 0x02
#define OPTION 0x04
#include "keywords.h"
#define KEYWORD(symbol, flags, nargs, func) \
[ K_##symbol ] = { #symbol, func, nargs + 1, flags, },
struct {
const char *name;
int (*func)(int nargs, char **args);
unsigned char nargs;
unsigned char flags;
} keyword_info[KEYWORD_COUNT] = {
[ K_UNKNOWN ] = { "unknown", 0, 0, 0 },
#include "keywords.h"
};
#undef KEYWORD
#define kw_is(kw, type) (keyword_info[kw].flags & (type))
#define kw_name(kw) (keyword_info[kw].name)
#define kw_func(kw) (keyword_info[kw].func)
#define kw_nargs(kw) (keyword_info[kw].nargs)
int lookup_keyword(const char *s)
{
switch (*s++) {
case 'c':
if (!strcmp(s, "opy")) return K_copy;
if (!strcmp(s, "apability")) return K_capability;
if (!strcmp(s, "hdir")) return K_chdir;
if (!strcmp(s, "hroot")) return K_chroot;
if (!strcmp(s, "lass")) return K_class;
if (!strcmp(s, "lass_start")) return K_class_start;
if (!strcmp(s, "lass_stop")) return K_class_stop;
if (!strcmp(s, "onsole")) return K_console;
if (!strcmp(s, "hown")) return K_chown;
if (!strcmp(s, "hmod")) return K_chmod;
if (!strcmp(s, "ritical")) return K_critical;
break;
case 'd':
if (!strcmp(s, "isabled")) return K_disabled;
if (!strcmp(s, "omainname")) return K_domainname;
break;
case 'e':
if (!strcmp(s, "xec")) return K_exec;
if (!strcmp(s, "xport")) return K_export;
break;
case 'g':
if (!strcmp(s, "roup")) return K_group;
break;
case 'h':
if (!strcmp(s, "ostname")) return K_hostname;
break;
case 'i':
if (!strcmp(s, "oprio")) return K_ioprio;
if (!strcmp(s, "fup")) return K_ifup;
if (!strcmp(s, "nsmod")) return K_insmod;
if (!strcmp(s, "mport")) return K_import;
break;
case 'k':
if (!strcmp(s, "eycodes")) return K_keycodes;
break;
case 'l':
if (!strcmp(s, "oglevel")) return K_loglevel;
break;
case 'm':
if (!strcmp(s, "kdir")) return K_mkdir;
if (!strcmp(s, "ount")) return K_mount;
break;
case 'o':
if (!strcmp(s, "n")) return K_on;
if (!strcmp(s, "neshot")) return K_oneshot;
if (!strcmp(s, "nrestart")) return K_onrestart;
break;
case 'r':
if (!strcmp(s, "estart")) return K_restart;
break;
case 's':
if (!strcmp(s, "ervice")) return K_service;
if (!strcmp(s, "etenv")) return K_setenv;
if (!strcmp(s, "etkey")) return K_setkey;
if (!strcmp(s, "etprop")) return K_setprop;
if (!strcmp(s, "etrlimit")) return K_setrlimit;
if (!strcmp(s, "ocket")) return K_socket;
if (!strcmp(s, "tart")) return K_start;
if (!strcmp(s, "top")) return K_stop;
if (!strcmp(s, "ymlink")) return K_symlink;
if (!strcmp(s, "ysclktz")) return K_sysclktz;
break;
case 't':
if (!strcmp(s, "rigger")) return K_trigger;
break;
case 'u':
if (!strcmp(s, "ser")) return K_user;
break;
case 'w':
if (!strcmp(s, "rite")) return K_write;
if (!strcmp(s, "ait")) return K_wait;
break;
}
return K_UNKNOWN;
}
void parse_line_no_op(struct parse_state *state, int nargs, char **args)
{
}
void parse_new_section(struct parse_state *state, int kw,
int nargs, char **args)
{
printf("[ %s %s ]\n", args[0],
nargs > 1 ? args[1] : "");
switch(kw) {
case K_service:
state->context = parse_service(state, nargs, args);
if (state->context) {
state->parse_line = parse_line_service;
return;
}
break;
case K_on:
state->context = parse_action(state, nargs, args);
if (state->context) {
state->parse_line = parse_line_action;
return;
}
break;
}
state->parse_line = parse_line_no_op;
}
static void parse_config(const char *fn, char *s)
{
struct parse_state state;
char *args[INIT_PARSER_MAXARGS];
int nargs;
nargs = 0;
state.filename = fn;
state.line = 1;
state.ptr = s;
state.nexttoken = 0;
state.parse_line = parse_line_no_op;
for (;;) {
switch (next_token(&state)) {
case T_EOF:
state.parse_line(&state, 0, 0);
return;
case T_NEWLINE:
if (nargs) {
int kw = lookup_keyword(args[0]);
if (kw_is(kw, SECTION)) {
state.parse_line(&state, 0, 0);
parse_new_section(&state, kw, nargs, args);
} else {
state.parse_line(&state, nargs, args);
}
nargs = 0;
}
break;
case T_TEXT:
if (nargs < INIT_PARSER_MAXARGS) {
args[nargs++] = state.text;
}
break;
}
}
}
int init_parse_config_file(const char *fn)
{
char *data;
data = read_file(fn, 0);
if (!data) return -1;
parse_config(fn, data);
DUMP();
return 0;
}
static int valid_name(const char *name)
{
if (strlen(name) > 16) {
return 0;
}
while (*name) {
if (!isalnum(*name) && (*name != '_') && (*name != '-')) {
return 0;
}
name++;
}
return 1;
}
struct service *service_find_by_name(const char *name)
{
struct listnode *node;
struct service *svc;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
if (!strcmp(svc->name, name)) {
return svc;
}
}
return 0;
}
struct service *service_find_by_pid(pid_t pid)
{
struct listnode *node;
struct service *svc;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
if (svc->pid == pid) {
return svc;
}
}
return 0;
}
struct service *service_find_by_keychord(int keychord_id)
{
struct listnode *node;
struct service *svc;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
if (svc->keychord_id == keychord_id) {
return svc;
}
}
return 0;
}
void service_for_each(void (*func)(struct service *svc))
{
struct listnode *node;
struct service *svc;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
func(svc);
}
}
void service_for_each_class(const char *classname,
void (*func)(struct service *svc))
{
struct listnode *node;
struct service *svc;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
if (!strcmp(svc->classname, classname)) {
func(svc);
}
}
}
void service_for_each_flags(unsigned matchflags,
void (*func)(struct service *svc))
{
struct listnode *node;
struct service *svc;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
if (svc->flags & matchflags) {
func(svc);
}
}
}
void action_for_each_trigger(const char *trigger,
void (*func)(struct action *act))
{
struct listnode *node;
struct action *act;
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
if (!strcmp(act->name, trigger)) {
func(act);
}
}
}
void queue_property_triggers(const char *name, const char *value)
{
struct listnode *node;
struct action *act;
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
if (!strncmp(act->name, "property:", strlen("property:"))) {
const char *test = act->name + strlen("property:");
int name_length = strlen(name);
if (!strncmp(name, test, name_length) &&
test[name_length] == '=' &&
!strcmp(test + name_length + 1, value)) {
action_add_queue_tail(act);
}
}
}
}
void queue_all_property_triggers()
{
struct listnode *node;
struct action *act;
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
if (!strncmp(act->name, "property:", strlen("property:"))) {
/* parse property name and value
syntax is property:<name>=<value> */
const char* name = act->name + strlen("property:");
const char* equals = strchr(name, '=');
if (equals) {
char prop_name[PROP_NAME_MAX + 1];
const char* value;
int length = equals - name;
if (length > PROP_NAME_MAX) {
ERROR("property name too long in trigger %s", act->name);
} else {
memcpy(prop_name, name, length);
prop_name[length] = 0;
/* does the property exist, and match the trigger value? */
value = property_get(prop_name);
if (value && !strcmp(equals + 1, value)) {
action_add_queue_tail(act);
}
}
}
}
}
}
void queue_builtin_action(int (*func)(int nargs, char **args), char *name)
{
struct action *act;
struct command *cmd;
act = calloc(1, sizeof(*act));
act->name = name;
list_init(&act->commands);
cmd = calloc(1, sizeof(*cmd));
cmd->func = func;
cmd->args[0] = name;
list_add_tail(&act->commands, &cmd->clist);
list_add_tail(&action_list, &act->alist);
action_add_queue_tail(act);
}
void action_add_queue_tail(struct action *act)
{
list_add_tail(&action_queue, &act->qlist);
}
struct action *action_remove_queue_head(void)
{
if (list_empty(&action_queue)) {
return 0;
} else {
struct listnode *node = list_head(&action_queue);
struct action *act = node_to_item(node, struct action, qlist);
list_remove(node);
return act;
}
}
int action_queue_empty()
{
return list_empty(&action_queue);
}
static void *parse_service(struct parse_state *state, int nargs, char **args)
{
struct service *svc;
if (nargs < 3) {
parse_error(state, "services must have a name and a program\n");
return 0;
}
if (!valid_name(args[1])) {
parse_error(state, "invalid service name '%s'\n", args[1]);
return 0;
}
svc = service_find_by_name(args[1]);
if (svc) {
parse_error(state, "ignored duplicate definition of service '%s'\n", args[1]);
return 0;
}
nargs -= 2;
svc = calloc(1, sizeof(*svc) + sizeof(char*) * nargs);
if (!svc) {
parse_error(state, "out of memory\n");
return 0;
}
svc->name = args[1];
svc->classname = "default";
memcpy(svc->args, args + 2, sizeof(char*) * nargs);
svc->args[nargs] = 0;
svc->nargs = nargs;
svc->onrestart.name = "onrestart";
list_init(&svc->onrestart.commands);
list_add_tail(&service_list, &svc->slist);
return svc;
}
static void parse_line_service(struct parse_state *state, int nargs, char **args)
{
struct service *svc = state->context;
struct command *cmd;
int i, kw, kw_nargs;
if (nargs == 0) {
return;
}
svc->ioprio_class = IoSchedClass_NONE;
kw = lookup_keyword(args[0]);
switch (kw) {
case K_capability:
break;
case K_class:
if (nargs != 2) {
parse_error(state, "class option requires a classname\n");
} else {
svc->classname = args[1];
}
break;
case K_console:
svc->flags |= SVC_CONSOLE;
break;
case K_disabled:
svc->flags |= SVC_DISABLED;
break;
case K_ioprio:
if (nargs != 3) {
parse_error(state, "ioprio optin usage: ioprio <rt|be|idle> <ioprio 0-7>\n");
} else {
svc->ioprio_pri = strtoul(args[2], 0, 8);
if (svc->ioprio_pri < 0 || svc->ioprio_pri > 7) {
parse_error(state, "priority value must be range 0 - 7\n");
break;
}
if (!strcmp(args[1], "rt")) {
svc->ioprio_class = IoSchedClass_RT;
} else if (!strcmp(args[1], "be")) {
svc->ioprio_class = IoSchedClass_BE;
} else if (!strcmp(args[1], "idle")) {
svc->ioprio_class = IoSchedClass_IDLE;
} else {
parse_error(state, "ioprio option usage: ioprio <rt|be|idle> <0-7>\n");
}
}
break;
case K_group:
if (nargs < 2) {
parse_error(state, "group option requires a group id\n");
} else if (nargs > NR_SVC_SUPP_GIDS + 2) {
parse_error(state, "group option accepts at most %d supp. groups\n",
NR_SVC_SUPP_GIDS);
} else {
int n;
svc->gid = decode_uid(args[1]);
for (n = 2; n < nargs; n++) {
svc->supp_gids[n-2] = decode_uid(args[n]);
}
svc->nr_supp_gids = n - 2;
}
break;
case K_keycodes:
if (nargs < 2) {
parse_error(state, "keycodes option requires atleast one keycode\n");
} else {
svc->keycodes = malloc((nargs - 1) * sizeof(svc->keycodes[0]));
if (!svc->keycodes) {
parse_error(state, "could not allocate keycodes\n");
} else {
svc->nkeycodes = nargs - 1;
for (i = 1; i < nargs; i++) {
svc->keycodes[i - 1] = atoi(args[i]);
}
}
}
break;
case K_oneshot:
svc->flags |= SVC_ONESHOT;
break;
case K_onrestart:
nargs--;
args++;
kw = lookup_keyword(args[0]);
if (!kw_is(kw, COMMAND)) {
parse_error(state, "invalid command '%s'\n", args[0]);
break;
}
kw_nargs = kw_nargs(kw);
if (nargs < kw_nargs) {
parse_error(state, "%s requires %d %s\n", args[0], kw_nargs - 1,
kw_nargs > 2 ? "arguments" : "argument");
break;
}
cmd = malloc(sizeof(*cmd) + sizeof(char*) * nargs);
cmd->func = kw_func(kw);
cmd->nargs = nargs;
memcpy(cmd->args, args, sizeof(char*) * nargs);
list_add_tail(&svc->onrestart.commands, &cmd->clist);
break;
case K_critical:
svc->flags |= SVC_CRITICAL;
break;
case K_setenv: { /* name value */
struct svcenvinfo *ei;
if (nargs < 2) {
parse_error(state, "setenv option requires name and value arguments\n");
break;
}
ei = calloc(1, sizeof(*ei));
if (!ei) {
parse_error(state, "out of memory\n");
break;
}
ei->name = args[1];
ei->value = args[2];
ei->next = svc->envvars;
svc->envvars = ei;
break;
}
case K_socket: {/* name type perm [ uid gid ] */
struct socketinfo *si;
if (nargs < 4) {
parse_error(state, "socket option requires name, type, perm arguments\n");
break;
}
if (strcmp(args[2],"dgram") && strcmp(args[2],"stream")
&& strcmp(args[2],"seqpacket")) {
parse_error(state, "socket type must be 'dgram', 'stream' or 'seqpacket'\n");
break;
}
si = calloc(1, sizeof(*si));
if (!si) {
parse_error(state, "out of memory\n");
break;
}
si->name = args[1];
si->type = args[2];
si->perm = strtoul(args[3], 0, 8);
if (nargs > 4)
si->uid = decode_uid(args[4]);
if (nargs > 5)
si->gid = decode_uid(args[5]);
si->next = svc->sockets;
svc->sockets = si;
break;
}
case K_user:
if (nargs != 2) {
parse_error(state, "user option requires a user id\n");
} else {
svc->uid = decode_uid(args[1]);
}
break;
default:
parse_error(state, "invalid option '%s'\n", args[0]);
}
}
static void *parse_action(struct parse_state *state, int nargs, char **args)
{
struct action *act;
if (nargs < 2) {
parse_error(state, "actions must have a trigger\n");
return 0;
}
if (nargs > 2) {
parse_error(state, "actions may not have extra parameters\n");
return 0;
}
act = calloc(1, sizeof(*act));
act->name = args[1];
list_init(&act->commands);
list_add_tail(&action_list, &act->alist);
/* XXX add to hash */
return act;
}
static void parse_line_action(struct parse_state* state, int nargs, char **args)
{
struct command *cmd;
struct action *act = state->context;
int (*func)(int nargs, char **args);
int kw, n;
if (nargs == 0) {
return;
}
kw = lookup_keyword(args[0]);
if (!kw_is(kw, COMMAND)) {
parse_error(state, "invalid command '%s'\n", args[0]);
return;
}
n = kw_nargs(kw);
if (nargs < n) {
parse_error(state, "%s requires %d %s\n", args[0], n - 1,
n > 2 ? "arguments" : "argument");
return;
}
cmd = malloc(sizeof(*cmd) + sizeof(char*) * nargs);
cmd->func = kw_func(kw);
cmd->nargs = nargs;
memcpy(cmd->args, args, sizeof(char*) * nargs);
list_add_tail(&act->commands, &cmd->clist);
}
system/core/init/init_parser.h
+35
View File
@@ -0,0 +1,35 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_INIT_PARSER_H_
#define _INIT_INIT_PARSER_H_
#define INIT_PARSER_MAXARGS 64
struct action;
struct action *action_remove_queue_head(void);
void action_add_queue_tail(struct action *act);
void action_for_each_trigger(const char *trigger,
void (*func)(struct action *act));
int action_queue_empty(void);
void queue_property_triggers(const char *name, const char *value);
void queue_all_property_triggers();
void queue_builtin_action(int (*func)(int nargs, char **args), char *name);
int init_parse_config_file(const char *fn);
#endif
system/core/init/keychords.c
+127
View File
@@ -0,0 +1,127 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/keychord.h>
#include "init.h"
#include "log.h"
#include "property_service.h"
static struct input_keychord *keychords = 0;
static int keychords_count = 0;
static int keychords_length = 0;
static int keychord_fd = -1;
void add_service_keycodes(struct service *svc)
{
struct input_keychord *keychord;
int i, size;
if (svc->keycodes) {
/* add a new keychord to the list */
size = sizeof(*keychord) + svc->nkeycodes * sizeof(keychord->keycodes[0]);
keychords = realloc(keychords, keychords_length + size);
if (!keychords) {
ERROR("could not allocate keychords\n");
keychords_length = 0;
keychords_count = 0;
return;
}
keychord = (struct input_keychord *)((char *)keychords + keychords_length);
keychord->version = KEYCHORD_VERSION;
keychord->id = keychords_count + 1;
keychord->count = svc->nkeycodes;
svc->keychord_id = keychord->id;
for (i = 0; i < svc->nkeycodes; i++) {
keychord->keycodes[i] = svc->keycodes[i];
}
keychords_count++;
keychords_length += size;
}
}
void keychord_init()
{
int fd, ret;
service_for_each(add_service_keycodes);
/* nothing to do if no services require keychords */
if (!keychords)
return;
fd = open("/dev/keychord", O_RDWR);
if (fd < 0) {
ERROR("could not open /dev/keychord\n");
return;
}
fcntl(fd, F_SETFD, FD_CLOEXEC);
ret = write(fd, keychords, keychords_length);
if (ret != keychords_length) {
ERROR("could not configure /dev/keychord %d (%d)\n", ret, errno);
close(fd);
fd = -1;
}
free(keychords);
keychords = 0;
keychord_fd = fd;
}
void handle_keychord()
{
struct service *svc;
const char* debuggable;
const char* adb_enabled;
int ret;
__u16 id;
// only handle keychords if ro.debuggable is set or adb is enabled.
// the logic here is that bugreports should be enabled in userdebug or eng builds
// and on user builds for users that are developers.
debuggable = property_get("ro.debuggable");
adb_enabled = property_get("init.svc.adbd");
ret = read(keychord_fd, &id, sizeof(id));
if (ret != sizeof(id)) {
ERROR("could not read keychord id\n");
return;
}
if ((debuggable && !strcmp(debuggable, "1")) ||
(adb_enabled && !strcmp(adb_enabled, "running"))) {
svc = service_find_by_keychord(id);
if (svc) {
INFO("starting service %s from keychord\n", svc->name);
service_start(svc, NULL);
} else {
ERROR("service for keychord %d not found\n", id);
}
}
}
int get_keychord_fd()
{
return keychord_fd;
}
system/core/init/keychords.h
+27
View File
@@ -0,0 +1,27 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_KEYCHORDS_H_
#define _INIT_KEYCHORDS_H_
struct service;
void add_service_keycodes(struct service *svc);
void keychord_init(void);
void handle_keychord(void);
int get_keychord_fd(void);
#endif
system/core/init/keywords.h
+85
View File
@@ -0,0 +1,85 @@
#ifndef KEYWORD
int do_chroot(int nargs, char **args);
int do_chdir(int nargs, char **args);
int do_class_start(int nargs, char **args);
int do_class_stop(int nargs, char **args);
int do_domainname(int nargs, char **args);
int do_exec(int nargs, char **args);
int do_export(int nargs, char **args);
int do_hostname(int nargs, char **args);
int do_ifup(int nargs, char **args);
int do_insmod(int nargs, char **args);
int do_import(int nargs, char **args);
int do_mkdir(int nargs, char **args);
int do_mount(int nargs, char **args);
int do_restart(int nargs, char **args);
int do_setkey(int nargs, char **args);
int do_setprop(int nargs, char **args);
int do_setrlimit(int nargs, char **args);
int do_start(int nargs, char **args);
int do_stop(int nargs, char **args);
int do_trigger(int nargs, char **args);
int do_symlink(int nargs, char **args);
int do_sysclktz(int nargs, char **args);
int do_write(int nargs, char **args);
int do_copy(int nargs, char **args);
int do_chown(int nargs, char **args);
int do_chmod(int nargs, char **args);
int do_loglevel(int nargs, char **args);
int do_wait(int nargs, char **args);
#define __MAKE_KEYWORD_ENUM__
#define KEYWORD(symbol, flags, nargs, func) K_##symbol,
enum {
K_UNKNOWN,
#endif
KEYWORD(capability, OPTION, 0, 0)
KEYWORD(chdir, COMMAND, 1, do_chdir)
KEYWORD(chroot, COMMAND, 1, do_chroot)
KEYWORD(class, OPTION, 0, 0)
KEYWORD(class_start, COMMAND, 1, do_class_start)
KEYWORD(class_stop, COMMAND, 1, do_class_stop)
KEYWORD(console, OPTION, 0, 0)
KEYWORD(critical, OPTION, 0, 0)
KEYWORD(disabled, OPTION, 0, 0)
KEYWORD(domainname, COMMAND, 1, do_domainname)
KEYWORD(exec, COMMAND, 1, do_exec)
KEYWORD(export, COMMAND, 2, do_export)
KEYWORD(group, OPTION, 0, 0)
KEYWORD(hostname, COMMAND, 1, do_hostname)
KEYWORD(ifup, COMMAND, 1, do_ifup)
KEYWORD(insmod, COMMAND, 1, do_insmod)
KEYWORD(import, COMMAND, 1, do_import)
KEYWORD(keycodes, OPTION, 0, 0)
KEYWORD(mkdir, COMMAND, 1, do_mkdir)
KEYWORD(mount, COMMAND, 3, do_mount)
KEYWORD(on, SECTION, 0, 0)
KEYWORD(oneshot, OPTION, 0, 0)
KEYWORD(onrestart, OPTION, 0, 0)
KEYWORD(restart, COMMAND, 1, do_restart)
KEYWORD(service, SECTION, 0, 0)
KEYWORD(setenv, OPTION, 2, 0)
KEYWORD(setkey, COMMAND, 0, do_setkey)
KEYWORD(setprop, COMMAND, 2, do_setprop)
KEYWORD(setrlimit, COMMAND, 3, do_setrlimit)
KEYWORD(socket, OPTION, 0, 0)
KEYWORD(start, COMMAND, 1, do_start)
KEYWORD(stop, COMMAND, 1, do_stop)
KEYWORD(trigger, COMMAND, 1, do_trigger)
KEYWORD(symlink, COMMAND, 1, do_symlink)
KEYWORD(sysclktz, COMMAND, 1, do_sysclktz)
KEYWORD(user, OPTION, 0, 0)
KEYWORD(wait, COMMAND, 1, do_wait)
KEYWORD(write, COMMAND, 2, do_write)
KEYWORD(copy, COMMAND, 2, do_copy)
KEYWORD(chown, COMMAND, 2, do_chown)
KEYWORD(chmod, COMMAND, 2, do_chmod)
KEYWORD(loglevel, COMMAND, 1, do_loglevel)
KEYWORD(ioprio, OPTION, 0, 0)
#ifdef __MAKE_KEYWORD_ENUM__
KEYWORD_COUNT,
};
#undef __MAKE_KEYWORD_ENUM__
#undef KEYWORD
#endif
system/core/init/list.h
+49
View File
@@ -0,0 +1,49 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_LIST_H_
#define _INIT_LIST_H_
struct listnode
{
struct listnode *next;
struct listnode *prev;
};
#define node_to_item(node, container, member) \
(container *) (((char*) (node)) - offsetof(container, member))
#define list_declare(name) \
struct listnode name = { \
.next = &name, \
.prev = &name, \
}
#define list_for_each(node, list) \
for (node = (list)->next; node != (list); node = node->next)
#define list_for_each_reverse(node, list) \
for (node = (list)->prev; node != (list); node = node->prev)
void list_init(struct listnode *list);
void list_add_tail(struct listnode *list, struct listnode *item);
void list_remove(struct listnode *item);
#define list_empty(list) ((list) == (list)->next)
#define list_head(list) ((list)->next)
#define list_tail(list) ((list)->prev)
#endif
system/core/init/log.h
+33
View File
@@ -0,0 +1,33 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_LOG_H_
#define _INIT_LOG_H_
void log_init(void);
void log_set_level(int level);
void log_close(void);
void log_write(int level, const char *fmt, ...)
__attribute__ ((format(printf, 2, 3)));
#define ERROR(x...) log_write(3, "<3>init: " x)
#define NOTICE(x...) log_write(5, "<5>init: " x)
#define INFO(x...) log_write(6, "<6>init: " x)
#define LOG_DEFAULT_LEVEL 3 /* messages <= this level are logged */
#define LOG_UEVENTS 0 /* log uevent messages if 1. verbose */
#endif
system/core/init/logo.c
+163
View File
@@ -0,0 +1,163 @@
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/fb.h>
#include <linux/kd.h>
#include "log.h"
#ifdef ANDROID
#include <cutils/memory.h>
#else
void android_memset16(void *_ptr, unsigned short val, unsigned count)
{
unsigned short *ptr = _ptr;
count >>= 1;
while(count--)
*ptr++ = val;
}
#endif
struct FB {
unsigned short *bits;
unsigned size;
int fd;
struct fb_fix_screeninfo fi;
struct fb_var_screeninfo vi;
};
#define fb_width(fb) ((fb)->vi.xres)
#define fb_height(fb) ((fb)->vi.yres)
#define fb_size(fb) ((fb)->vi.xres * (fb)->vi.yres * 2)
static int fb_open(struct FB *fb)
{
fb->fd = open("/dev/graphics/fb0", O_RDWR);
if (fb->fd < 0)
return -1;
if (ioctl(fb->fd, FBIOGET_FSCREENINFO, &fb->fi) < 0)
goto fail;
if (ioctl(fb->fd, FBIOGET_VSCREENINFO, &fb->vi) < 0)
goto fail;
fb->bits = mmap(0, fb_size(fb), PROT_READ | PROT_WRITE,
MAP_SHARED, fb->fd, 0);
if (fb->bits == MAP_FAILED)
goto fail;
return 0;
fail:
close(fb->fd);
return -1;
}
static void fb_close(struct FB *fb)
{
munmap(fb->bits, fb_size(fb));
close(fb->fd);
}
/* there's got to be a more portable way to do this ... */
static void fb_update(struct FB *fb)
{
fb->vi.yoffset = 1;
ioctl(fb->fd, FBIOPUT_VSCREENINFO, &fb->vi);
fb->vi.yoffset = 0;
ioctl(fb->fd, FBIOPUT_VSCREENINFO, &fb->vi);
}
static int vt_set_mode(int graphics)
{
int fd, r;
fd = open("/dev/tty0", O_RDWR | O_SYNC);
if (fd < 0)
return -1;
r = ioctl(fd, KDSETMODE, (void*) (graphics ? KD_GRAPHICS : KD_TEXT));
close(fd);
return r;
}
/* 565RLE image format: [count(2 bytes), rle(2 bytes)] */
int load_565rle_image(char *fn)
{
struct FB fb;
struct stat s;
unsigned short *data, *bits, *ptr;
unsigned count, max;
int fd;
if (vt_set_mode(1))
return -1;
fd = open(fn, O_RDONLY);
if (fd < 0) {
ERROR("cannot open '%s'\n", fn);
goto fail_restore_text;
}
if (fstat(fd, &s) < 0) {
goto fail_close_file;
}
data = mmap(0, s.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (data == MAP_FAILED)
goto fail_close_file;
if (fb_open(&fb))
goto fail_unmap_data;
max = fb_width(&fb) * fb_height(&fb);
ptr = data;
count = s.st_size;
bits = fb.bits;
while (count > 3) {
unsigned n = ptr[0];
if (n > max)
break;
android_memset16(bits, ptr[1], n << 1);
bits += n;
max -= n;
ptr += 2;
count -= 4;
}
munmap(data, s.st_size);
fb_update(&fb);
fb_close(&fb);
close(fd);
unlink(fn);
return 0;
fail_unmap_data:
munmap(data, s.st_size);
fail_close_file:
close(fd);
fail_restore_text:
vt_set_mode(0);
return -1;
}
system/core/init/parser.c
+181
View File
@@ -0,0 +1,181 @@
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "parser.h"
#include "list.h"
#include "log.h"
#define RAW(x...) log_write(6, x)
void DUMP(void)
{
#if 0
struct service *svc;
struct action *act;
struct command *cmd;
struct listnode *node;
struct listnode *node2;
struct socketinfo *si;
int n;
list_for_each(node, &service_list) {
svc = node_to_item(node, struct service, slist);
RAW("service %s\n", svc->name);
RAW(" class '%s'\n", svc->classname);
RAW(" exec");
for (n = 0; n < svc->nargs; n++) {
RAW(" '%s'", svc->args[n]);
}
RAW("\n");
for (si = svc->sockets; si; si = si->next) {
RAW(" socket %s %s 0%o\n", si->name, si->type, si->perm);
}
}
list_for_each(node, &action_list) {
act = node_to_item(node, struct action, alist);
RAW("on %s\n", act->name);
list_for_each(node2, &act->commands) {
cmd = node_to_item(node2, struct command, clist);
RAW(" %p", cmd->func);
for (n = 0; n < cmd->nargs; n++) {
RAW(" %s", cmd->args[n]);
}
RAW("\n");
}
RAW("\n");
}
#endif
}
void parse_error(struct parse_state *state, const char *fmt, ...)
{
va_list ap;
char buf[128];
int off;
snprintf(buf, 128, "%s: %d: ", state->filename, state->line);
buf[127] = 0;
off = strlen(buf);
va_start(ap, fmt);
vsnprintf(buf + off, 128 - off, fmt, ap);
va_end(ap);
buf[127] = 0;
ERROR("%s", buf);
}
int next_token(struct parse_state *state)
{
char *x = state->ptr;
char *s;
if (state->nexttoken) {
int t = state->nexttoken;
state->nexttoken = 0;
return t;
}
for (;;) {
switch (*x) {
case 0:
state->ptr = x;
return T_EOF;
case '\n':
state->line++;
x++;
state->ptr = x;
return T_NEWLINE;
case ' ':
case '\t':
case '\r':
x++;
continue;
case '#':
while (*x && (*x != '\n')) x++;
state->line++;
state->ptr = x;
return T_NEWLINE;
default:
goto text;
}
}
textdone:
state->ptr = x;
*s = 0;
return T_TEXT;
text:
state->text = s = x;
textresume:
for (;;) {
switch (*x) {
case 0:
goto textdone;
case ' ':
case '\t':
case '\r':
x++;
goto textdone;
case '\n':
state->nexttoken = T_NEWLINE;
x++;
goto textdone;
case '"':
x++;
for (;;) {
switch (*x) {
case 0:
/* unterminated quoted thing */
state->ptr = x;
return T_EOF;
case '"':
x++;
goto textresume;
default:
*s++ = *x++;
}
}
break;
case '\\':
x++;
switch (*x) {
case 0:
goto textdone;
case 'n':
*s++ = '\n';
break;
case 'r':
*s++ = '\r';
break;
case 't':
*s++ = '\t';
break;
case '\\':
*s++ = '\\';
break;
case '\r':
/* \ <cr> <lf> -> line continuation */
if (x[1] != '\n') {
x++;
continue;
}
case '\n':
/* \ <lf> -> line continuation */
state->line++;
x++;
/* eat any extra whitespace */
while((*x == ' ') || (*x == '\t')) x++;
continue;
default:
/* unknown escape -- just copy */
*s++ = *x++;
}
continue;
default:
*s++ = *x++;
}
}
return T_EOF;
}
system/core/init/parser.h
+40
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@@ -0,0 +1,40 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef PARSER_H_
#define PARSER_H_
#define T_EOF 0
#define T_TEXT 1
#define T_NEWLINE 2
struct parse_state
{
char *ptr;
char *text;
int line;
int nexttoken;
void *context;
void (*parse_line)(struct parse_state *state, int nargs, char **args);
const char *filename;
};
int lookup_keyword(const char *s);
void DUMP(void);
int next_token(struct parse_state *state);
void parse_error(struct parse_state *state, const char *fmt, ...);
#endif /* PARSER_H_ */
system/core/init/property_service.c
+544
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@@ -0,0 +1,544 @@
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <fcntl.h>
#include <stdarg.h>
#include <dirent.h>
#include <limits.h>
#include <errno.h>
#include <cutils/misc.h>
#include <cutils/sockets.h>
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
#include <sys/socket.h>
#include <sys/un.h>
#include <sys/select.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <sys/mman.h>
#include <sys/atomics.h>
#include <private/android_filesystem_config.h>
#include "property_service.h"
#include "init.h"
#include "util.h"
#include "log.h"
#define PERSISTENT_PROPERTY_DIR "/data/property"
static int persistent_properties_loaded = 0;
static int property_area_inited = 0;
static int property_set_fd = -1;
/* White list of permissions for setting property services. */
struct {
const char *prefix;
unsigned int uid;
unsigned int gid;
} property_perms[] = {
{ "net.rmnet", AID_RADIO, 0 },
{ "net.gprs.", AID_RADIO, 0 },
{ "net.ppp", AID_RADIO, 0 },
{ "ril.", AID_RADIO, 0 },
{ "gsm.", AID_RADIO, 0 },
{ "persist.radio", AID_RADIO, 0 },
{ "net.dns", AID_RADIO, 0 },
{ "net.", AID_SYSTEM, 0 },
{ "dev.", AID_SYSTEM, 0 },
{ "runtime.", AID_SYSTEM, 0 },
{ "hw.", AID_SYSTEM, 0 },
{ "sys.", AID_SYSTEM, 0 },
{ "service.", AID_SYSTEM, 0 },
{ "wlan.", AID_SYSTEM, 0 },
{ "bt.", AID_BLUETOOTH, 0 },
{ "dhcp.", AID_SYSTEM, 0 },
{ "dhcp.", AID_DHCP, 0 },
{ "vpn.", AID_SYSTEM, 0 },
{ "vpn.", AID_VPN, 0 },
{ "debug.", AID_SHELL, 0 },
{ "log.", AID_SHELL, 0 },
{ "service.adb.root", AID_SHELL, 0 },
{ "persist.sys.", AID_SYSTEM, 0 },
{ "persist.service.", AID_SYSTEM, 0 },
{ "persist.security.", AID_SYSTEM, 0 },
{ "hw.fm.", AID_FM_RADIO, 0 },
{ "crypto.", AID_MEDIA, 0 },
{ "bluetooth.", AID_SYSTEM, 0 },
{ "wifi.", AID_WIFI, 0 },
{ NULL, 0, 0 }
};
/*
* White list of UID that are allowed to start/stop services.
* Currently there are no user apps that require.
*/
struct {
const char *service;
unsigned int uid;
unsigned int gid;
} control_perms[] = {
{ "dumpstate",AID_SHELL, AID_LOG },
{ "fm_dl", AID_FM_RADIO, AID_FM_RADIO},
{NULL, 0, 0 }
};
typedef struct {
void *data;
size_t size;
int fd;
} workspace;
static int init_workspace(workspace *w, size_t size)
{
void *data;
int fd;
/* dev is a tmpfs that we can use to carve a shared workspace
* out of, so let's do that...
*/
fd = open("/dev/__properties__", O_RDWR | O_CREAT, 0600);
if (fd < 0)
return -1;
if (ftruncate(fd, size) < 0)
goto out;
data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
if(data == MAP_FAILED)
goto out;
close(fd);
fd = open("/dev/__properties__", O_RDONLY);
if (fd < 0)
return -1;
unlink("/dev/__properties__");
w->data = data;
w->size = size;
w->fd = fd;
return 0;
out:
close(fd);
return -1;
}
/* (8 header words + 247 toc words) = 1020 bytes */
/* 1024 bytes header and toc + 247 prop_infos @ 128 bytes = 32640 bytes */
#define PA_COUNT_MAX 247
#define PA_INFO_START 1024
#define PA_SIZE 32768
static workspace pa_workspace;
static prop_info *pa_info_array;
extern prop_area *__system_property_area__;
static int init_property_area(void)
{
prop_area *pa;
if(pa_info_array)
return -1;
if(init_workspace(&pa_workspace, PA_SIZE))
return -1;
fcntl(pa_workspace.fd, F_SETFD, FD_CLOEXEC);
pa_info_array = (void*) (((char*) pa_workspace.data) + PA_INFO_START);
pa = pa_workspace.data;
memset(pa, 0, PA_SIZE);
pa->magic = PROP_AREA_MAGIC;
pa->version = PROP_AREA_VERSION;
/* plug into the lib property services */
__system_property_area__ = pa;
property_area_inited = 1;
return 0;
}
static void update_prop_info(prop_info *pi, const char *value, unsigned len)
{
pi->serial = pi->serial | 1;
memcpy(pi->value, value, len + 1);
pi->serial = (len << 24) | ((pi->serial + 1) & 0xffffff);
__futex_wake(&pi->serial, INT32_MAX);
}
static int property_write(prop_info *pi, const char *value)
{
int valuelen = strlen(value);
if(valuelen >= PROP_VALUE_MAX) return -1;
update_prop_info(pi, value, valuelen);
return 0;
}
/*
* Checks permissions for starting/stoping system services.
* AID_SYSTEM and AID_ROOT are always allowed.
*
* Returns 1 if uid allowed, 0 otherwise.
*/
static int check_control_perms(const char *name, unsigned int uid, unsigned int gid) {
int i;
if (uid == AID_SYSTEM || uid == AID_ROOT)
return 1;
/* Search the ACL */
for (i = 0; control_perms[i].service; i++) {
if (strcmp(control_perms[i].service, name) == 0) {
if ((uid && control_perms[i].uid == uid) ||
(gid && control_perms[i].gid == gid)) {
return 1;
}
}
}
return 0;
}
/*
* Checks permissions for setting system properties.
* Returns 1 if uid allowed, 0 otherwise.
*/
static int check_perms(const char *name, unsigned int uid, unsigned int gid)
{
int i;
if (uid == 0)
return 1;
if(!strncmp(name, "ro.", 3))
name +=3;
for (i = 0; property_perms[i].prefix; i++) {
int tmp;
if (strncmp(property_perms[i].prefix, name,
strlen(property_perms[i].prefix)) == 0) {
if ((uid && property_perms[i].uid == uid) ||
(gid && property_perms[i].gid == gid)) {
return 1;
}
}
}
return 0;
}
const char* property_get(const char *name)
{
prop_info *pi;
if(strlen(name) >= PROP_NAME_MAX) return 0;
pi = (prop_info*) __system_property_find(name);
if(pi != 0) {
return pi->value;
} else {
return 0;
}
}
static void write_persistent_property(const char *name, const char *value)
{
const char *tempPath = PERSISTENT_PROPERTY_DIR "/.temp";
char path[PATH_MAX];
int fd, length;
snprintf(path, sizeof(path), "%s/%s", PERSISTENT_PROPERTY_DIR, name);
fd = open(tempPath, O_WRONLY|O_CREAT|O_TRUNC, 0600);
if (fd < 0) {
ERROR("Unable to write persistent property to temp file %s errno: %d\n", tempPath, errno);
return;
}
write(fd, value, strlen(value));
fsync(fd);
close(fd);
if (rename(tempPath, path)) {
unlink(tempPath);
ERROR("Unable to rename persistent property file %s to %s\n", tempPath, path);
}
}
int property_set(const char *name, const char *value)
{
prop_area *pa;
prop_info *pi;
int namelen = strlen(name);
int valuelen = strlen(value);
if(namelen >= PROP_NAME_MAX) return -1;
if(valuelen >= PROP_VALUE_MAX) return -1;
if(namelen < 1) return -1;
pi = (prop_info*) __system_property_find(name);
if(pi != 0) {
/* ro.* properties may NEVER be modified once set */
if(!strncmp(name, "ro.", 3)) return -1;
pa = __system_property_area__;
update_prop_info(pi, value, valuelen);
pa->serial++;
__futex_wake(&pa->serial, INT32_MAX);
} else {
pa = __system_property_area__;
if(pa->count == PA_COUNT_MAX) return -1;
pi = pa_info_array + pa->count;
pi->serial = (valuelen << 24);
memcpy(pi->name, name, namelen + 1);
memcpy(pi->value, value, valuelen + 1);
pa->toc[pa->count] =
(namelen << 24) | (((unsigned) pi) - ((unsigned) pa));
pa->count++;
pa->serial++;
__futex_wake(&pa->serial, INT32_MAX);
}
/* If name starts with "net." treat as a DNS property. */
if (strncmp("net.", name, strlen("net.")) == 0) {
if (strcmp("net.change", name) == 0) {
return 0;
}
/*
* The 'net.change' property is a special property used track when any
* 'net.*' property name is updated. It is _ONLY_ updated here. Its value
* contains the last updated 'net.*' property.
*/
property_set("net.change", name);
} else if (persistent_properties_loaded &&
strncmp("persist.", name, strlen("persist.")) == 0) {
/*
* Don't write properties to disk until after we have read all default properties
* to prevent them from being overwritten by default values.
*/
write_persistent_property(name, value);
}
property_changed(name, value);
return 0;
}
static int property_list(void (*propfn)(const char *key, const char *value, void *cookie),
void *cookie)
{
char name[PROP_NAME_MAX];
char value[PROP_VALUE_MAX];
const prop_info *pi;
unsigned n;
for(n = 0; (pi = __system_property_find_nth(n)); n++) {
__system_property_read(pi, name, value);
propfn(name, value, cookie);
}
return 0;
}
void handle_property_set_fd()
{
prop_msg msg;
int s;
int r;
int res;
struct ucred cr;
struct sockaddr_un addr;
socklen_t addr_size = sizeof(addr);
socklen_t cr_size = sizeof(cr);
if ((s = accept(property_set_fd, (struct sockaddr *) &addr, &addr_size)) < 0) {
return;
}
/* Check socket options here */
if (getsockopt(s, SOL_SOCKET, SO_PEERCRED, &cr, &cr_size) < 0) {
close(s);
ERROR("Unable to recieve socket options\n");
return;
}
r = recv(s, &msg, sizeof(msg), 0);
close(s);
if(r != sizeof(prop_msg)) {
ERROR("sys_prop: mis-match msg size recieved: %d expected: %d\n",
r, sizeof(prop_msg));
return;
}
switch(msg.cmd) {
case PROP_MSG_SETPROP:
msg.name[PROP_NAME_MAX-1] = 0;
msg.value[PROP_VALUE_MAX-1] = 0;
if(memcmp(msg.name,"ctl.",4) == 0) {
if (check_control_perms(msg.value, cr.uid, cr.gid)) {
handle_control_message((char*) msg.name + 4, (char*) msg.value);
} else {
ERROR("sys_prop: Unable to %s service ctl [%s] uid: %d pid:%d\n",
msg.name + 4, msg.value, cr.uid, cr.pid);
}
} else {
if (check_perms(msg.name, cr.uid, cr.gid)) {
property_set((char*) msg.name, (char*) msg.value);
} else {
ERROR("sys_prop: permission denied uid:%d name:%s\n",
cr.uid, msg.name);
}
}
break;
default:
break;
}
}
void get_property_workspace(int *fd, int *sz)
{
*fd = pa_workspace.fd;
*sz = pa_workspace.size;
}
static void load_properties(char *data)
{
char *key, *value, *eol, *sol, *tmp;
sol = data;
while((eol = strchr(sol, '\n'))) {
key = sol;
*eol++ = 0;
sol = eol;
value = strchr(key, '=');
if(value == 0) continue;
*value++ = 0;
while(isspace(*key)) key++;
if(*key == '#') continue;
tmp = value - 2;
while((tmp > key) && isspace(*tmp)) *tmp-- = 0;
while(isspace(*value)) value++;
tmp = eol - 2;
while((tmp > value) && isspace(*tmp)) *tmp-- = 0;
property_set(key, value);
}
}
static void load_properties_from_file(const char *fn)
{
char *data;
unsigned sz;
data = read_file(fn, &sz);
if(data != 0) {
load_properties(data);
free(data);
}
}
static void load_persistent_properties()
{
DIR* dir = opendir(PERSISTENT_PROPERTY_DIR);
struct dirent* entry;
char path[PATH_MAX];
char value[PROP_VALUE_MAX];
int fd, length;
if (dir) {
while ((entry = readdir(dir)) != NULL) {
if (strncmp("persist.", entry->d_name, strlen("persist.")))
continue;
#if HAVE_DIRENT_D_TYPE
if (entry->d_type != DT_REG)
continue;
#endif
/* open the file and read the property value */
snprintf(path, sizeof(path), "%s/%s", PERSISTENT_PROPERTY_DIR, entry->d_name);
fd = open(path, O_RDONLY);
if (fd >= 0) {
length = read(fd, value, sizeof(value) - 1);
if (length >= 0) {
value[length] = 0;
property_set(entry->d_name, value);
} else {
ERROR("Unable to read persistent property file %s errno: %d\n", path, errno);
}
close(fd);
} else {
ERROR("Unable to open persistent property file %s errno: %d\n", path, errno);
}
}
closedir(dir);
} else {
ERROR("Unable to open persistent property directory %s errno: %d\n", PERSISTENT_PROPERTY_DIR, errno);
}
persistent_properties_loaded = 1;
}
void property_init(void)
{
init_property_area();
load_properties_from_file(PROP_PATH_RAMDISK_DEFAULT);
}
int properties_inited(void)
{
return property_area_inited;
}
void start_property_service(void)
{
int fd;
load_properties_from_file(PROP_PATH_SYSTEM_BUILD);
load_properties_from_file(PROP_PATH_SYSTEM_DEFAULT);
load_properties_from_file(PROP_PATH_LOCAL_OVERRIDE);
/* Read persistent properties after all default values have been loaded. */
load_persistent_properties();
fd = create_socket(PROP_SERVICE_NAME, SOCK_STREAM, 0666, 0, 0);
if(fd < 0) return;
fcntl(fd, F_SETFD, FD_CLOEXEC);
fcntl(fd, F_SETFL, O_NONBLOCK);
listen(fd, 8);
property_set_fd = fd;
}
int get_property_set_fd()
{
return property_set_fd;
}
system/core/init/property_service.h
+29
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@@ -0,0 +1,29 @@
/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_PROPERTY_H
#define _INIT_PROPERTY_H
extern void handle_property_set_fd(void);
extern void property_init(void);
extern void start_property_service(void);
void get_property_workspace(int *fd, int *sz);
extern const char* property_get(const char *name);
extern int property_set(const char *name, const char *value);
extern int properties_inited();
int get_property_set_fd(void);
#endif /* _INIT_PROPERTY_H */
system/core/init/readme.txt
+299
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Android Init Language
---------------------
The Android Init Language consists of four broad classes of statements,
which are Actions, Commands, Services, and Options.
All of these are line-oriented, consisting of tokens separated by
whitespace. The c-style backslash escapes may be used to insert
whitespace into a token. Double quotes may also be used to prevent
whitespace from breaking text into multiple tokens. The backslash,
when it is the last character on a line, may be used for line-folding.
Lines which start with a # (leading whitespace allowed) are comments.
Actions and Services implicitly declare a new section. All commands
or options belong to the section most recently declared. Commands
or options before the first section are ignored.
Actions and Services have unique names. If a second Action or Service
is declared with the same name as an existing one, it is ignored as
an error. (??? should we override instead)
Actions
-------
Actions are named sequences of commands. Actions have a trigger which
is used to determine when the action should occur. When an event
occurs which matches an action's trigger, that action is added to
the tail of a to-be-executed queue (unless it is already on the
queue).
Each action in the queue is dequeued in sequence and each command in
that action is executed in sequence. Init handles other activities
(device creation/destruction, property setting, process restarting)
"between" the execution of the commands in activities.
Actions take the form of:
on <trigger>
<command>
<command>
<command>
Services
--------
Services are programs which init launches and (optionally) restarts
when they exit. Services take the form of:
service <name> <pathname> [ <argument> ]*
<option>
<option>
...
Options
-------
Options are modifiers to services. They affect how and when init
runs the service.
critical
This is a device-critical service. If it exits more than four times in
four minutes, the device will reboot into recovery mode.
disabled
This service will not automatically start with its class.
It must be explicitly started by name.
setenv <name> <value>
Set the environment variable <name> to <value> in the launched process.
socket <name> <type> <perm> [ <user> [ <group> ] ]
Create a unix domain socket named /dev/socket/<name> and pass
its fd to the launched process. <type> must be "dgram", "stream" or "seqpacket".
User and group default to 0.
user <username>
Change to username before exec'ing this service.
Currently defaults to root. (??? probably should default to nobody)
Currently, if your process requires linux capabilities then you cannot use
this command. You must instead request the capabilities in-process while
still root, and then drop to your desired uid.
group <groupname> [ <groupname> ]*
Change to groupname before exec'ing this service. Additional
groupnames beyond the (required) first one are used to set the
supplemental groups of the process (via setgroups()).
Currently defaults to root. (??? probably should default to nobody)
oneshot
Do not restart the service when it exits.
class <name>
Specify a class name for the service. All services in a
named class may be started or stopped together. A service
is in the class "default" if one is not specified via the
class option.
onrestart
Execute a Command (see below) when service restarts.
Triggers
--------
Triggers are strings which can be used to match certain kinds
of events and used to cause an action to occur.
boot
This is the first trigger that will occur when init starts
(after /init.conf is loaded)
<name>=<value>
Triggers of this form occur when the property <name> is set
to the specific value <value>.
device-added-<path>
device-removed-<path>
Triggers of these forms occur when a device node is added
or removed.
service-exited-<name>
Triggers of this form occur when the specified service exits.
Commands
--------
exec <path> [ <argument> ]*
Fork and execute a program (<path>). This will block until
the program completes execution. It is best to avoid exec
as unlike the builtin commands, it runs the risk of getting
init "stuck". (??? maybe there should be a timeout?)
export <name> <value>
Set the environment variable <name> equal to <value> in the
global environment (which will be inherited by all processes
started after this command is executed)
ifup <interface>
Bring the network interface <interface> online.
import <filename>
Parse an init config file, extending the current configuration.
hostname <name>
Set the host name.
chdir <directory>
Change working directory.
chmod <octal-mode> <path>
Change file access permissions.
chown <owner> <group> <path>
Change file owner and group.
chroot <directory>
Change process root directory.
class_start <serviceclass>
Start all services of the specified class if they are
not already running.
class_stop <serviceclass>
Stop all services of the specified class if they are
currently running.
domainname <name>
Set the domain name.
insmod <path>
Install the module at <path>
mkdir <path> [mode] [owner] [group]
Create a directory at <path>, optionally with the given mode, owner, and
group. If not provided, the directory is created with permissions 755 and
owned by the root user and root group.
mount <type> <device> <dir> [ <mountoption> ]*
Attempt to mount the named device at the directory <dir>
<device> may be of the form mtd@name to specify a mtd block
device by name.
<mountoption>s include "ro", "rw", "remount", "noatime", ...
setkey
TBD
setprop <name> <value>
Set system property <name> to <value>.
setrlimit <resource> <cur> <max>
Set the rlimit for a resource.
start <service>
Start a service running if it is not already running.
stop <service>
Stop a service from running if it is currently running.
symlink <target> <path>
Create a symbolic link at <path> with the value <target>
sysclktz <mins_west_of_gmt>
Set the system clock base (0 if system clock ticks in GMT)
trigger <event>
Trigger an event. Used to queue an action from another
action.
write <path> <string> [ <string> ]*
Open the file at <path> and write one or more strings
to it with write(2)
Properties
----------
Init updates some system properties to provide some insight into
what it's doing:
init.action
Equal to the name of the action currently being executed or "" if none
init.command
Equal to the command being executed or "" if none.
init.svc.<name>
State of a named service ("stopped", "running", "restarting")
Example init.conf
-----------------
# not complete -- just providing some examples of usage
#
on boot
export PATH /sbin:/system/sbin:/system/bin
export LD_LIBRARY_PATH /system/lib
mkdir /dev
mkdir /proc
mkdir /sys
mount tmpfs tmpfs /dev
mkdir /dev/pts
mkdir /dev/socket
mount devpts devpts /dev/pts
mount proc proc /proc
mount sysfs sysfs /sys
write /proc/cpu/alignment 4
ifup lo
hostname localhost
domainname localhost
mount yaffs2 mtd@system /system
mount yaffs2 mtd@userdata /data
import /system/etc/init.conf
class_start default
service adbd /sbin/adbd
user adb
group adb
service usbd /system/bin/usbd -r
user usbd
group usbd
socket usbd 666
service zygote /system/bin/app_process -Xzygote /system/bin --zygote
socket zygote 666
service runtime /system/bin/runtime
user system
group system
on device-added-/dev/compass
start akmd
on device-removed-/dev/compass
stop akmd
service akmd /sbin/akmd
disabled
user akmd
group akmd
Debugging notes
---------------
By default, programs executed by init will drop stdout and stderr into
/dev/null. To help with debugging, you can execute your program via the
Andoird program logwrapper. This will redirect stdout/stderr into the
Android logging system (accessed via logcat).
For example
service akmd /system/bin/logwrapper /sbin/akmd
system/core/init/signal_handler.c
+159
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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
#include <cutils/sockets.h>
#include <sys/reboot.h>
#include "init.h"
#include "list.h"
#include "util.h"
#include "log.h"
static int signal_fd = -1;
static int signal_recv_fd = -1;
static void sigchld_handler(int s)
{
write(signal_fd, &s, 1);
}
#define CRITICAL_CRASH_THRESHOLD 4 /* if we crash >4 times ... */
#define CRITICAL_CRASH_WINDOW (4*60) /* ... in 4 minutes, goto recovery*/
static int wait_for_one_process(int block)
{
pid_t pid;
int status;
struct service *svc;
struct socketinfo *si;
time_t now;
struct listnode *node;
struct command *cmd;
while ( (pid = waitpid(-1, &status, block ? 0 : WNOHANG)) == -1 && errno == EINTR );
if (pid <= 0) return -1;
INFO("waitpid returned pid %d, status = %08x\n", pid, status);
svc = service_find_by_pid(pid);
if (!svc) {
ERROR("untracked pid %d exited\n", pid);
return 0;
}
NOTICE("process '%s', pid %d exited\n", svc->name, pid);
if (!(svc->flags & SVC_ONESHOT)) {
kill(-pid, SIGKILL);
NOTICE("process '%s' killing any children in process group\n", svc->name);
}
/* remove any sockets we may have created */
for (si = svc->sockets; si; si = si->next) {
char tmp[128];
snprintf(tmp, sizeof(tmp), ANDROID_SOCKET_DIR"/%s", si->name);
unlink(tmp);
}
svc->pid = 0;
svc->flags &= (~SVC_RUNNING);
/* oneshot processes go into the disabled state on exit */
if (svc->flags & SVC_ONESHOT) {
svc->flags |= SVC_DISABLED;
}
/* disabled processes do not get restarted automatically */
if (svc->flags & SVC_DISABLED) {
notify_service_state(svc->name, "stopped");
return 0;
}
now = gettime();
if (svc->flags & SVC_CRITICAL) {
if (svc->time_crashed + CRITICAL_CRASH_WINDOW >= now) {
if (++svc->nr_crashed > CRITICAL_CRASH_THRESHOLD) {
ERROR("critical process '%s' exited %d times in %d minutes; "
"rebooting into recovery mode\n", svc->name,
CRITICAL_CRASH_THRESHOLD, CRITICAL_CRASH_WINDOW / 60);
sync();
__reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_RESTART2, "recovery");
return 0;
}
} else {
svc->time_crashed = now;
svc->nr_crashed = 1;
}
}
svc->flags |= SVC_RESTARTING;
/* Execute all onrestart commands for this service. */
list_for_each(node, &svc->onrestart.commands) {
cmd = node_to_item(node, struct command, clist);
cmd->func(cmd->nargs, cmd->args);
}
notify_service_state(svc->name, "restarting");
return 0;
}
void handle_signal(void)
{
char tmp[32];
/* we got a SIGCHLD - reap and restart as needed */
read(signal_recv_fd, tmp, sizeof(tmp));
while (!wait_for_one_process(0))
;
}
void signal_init(void)
{
int s[2];
struct sigaction act;
act.sa_handler = sigchld_handler;
act.sa_flags = SA_NOCLDSTOP;
act.sa_mask = 0;
act.sa_restorer = NULL;
sigaction(SIGCHLD, &act, 0);
/* create a signalling mechanism for the sigchld handler */
if (socketpair(AF_UNIX, SOCK_STREAM, 0, s) == 0) {
signal_fd = s[0];
signal_recv_fd = s[1];
fcntl(s[0], F_SETFD, FD_CLOEXEC);
fcntl(s[0], F_SETFL, O_NONBLOCK);
fcntl(s[1], F_SETFD, FD_CLOEXEC);
fcntl(s[1], F_SETFL, O_NONBLOCK);
}
handle_signal();
}
int get_signal_fd()
{
return signal_recv_fd;
}
system/core/init/signal_handler.h
+24
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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_SIGNAL_HANDLER_H_
#define _INIT_SIGNAL_HANDLER_H_
void signal_init(void);
void handle_signal(void);
int get_signal_fd(void);
#endif
system/core/init/ueventd.c
+147
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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <poll.h>
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <private/android_filesystem_config.h>
#include "ueventd.h"
#include "log.h"
#include "util.h"
#include "devices.h"
#include "ueventd_parser.h"
static char hardware[32];
static unsigned revision = 0;
int ueventd_main(int argc, char **argv)
{
struct pollfd ufd;
int nr;
char tmp[32];
open_devnull_stdio();
log_init();
INFO("starting ueventd\n");
get_hardware_name(hardware, &revision);
ueventd_parse_config_file("/ueventd.rc");
snprintf(tmp, sizeof(tmp), "/ueventd.%s.rc", hardware);
ueventd_parse_config_file(tmp);
device_init();
ufd.events = POLLIN;
ufd.fd = get_device_fd();
while(1) {
ufd.revents = 0;
nr = poll(&ufd, 1, -1);
if (nr <= 0)
continue;
if (ufd.revents == POLLIN)
handle_device_fd();
}
}
static int get_android_id(const char *id)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(android_ids); i++)
if (!strcmp(id, android_ids[i].name))
return android_ids[i].aid;
return 0;
}
void set_device_permission(int nargs, char **args)
{
char *name;
char *attr = 0;
mode_t perm;
uid_t uid;
gid_t gid;
int prefix = 0;
char *endptr;
int ret;
char *tmp = 0;
if (nargs == 0)
return;
if (args[0][0] == '#')
return;
name = args[0];
if (!strncmp(name,"/sys/", 5) && (nargs == 5)) {
INFO("/sys/ rule %s %s\n",args[0],args[1]);
attr = args[1];
args++;
nargs--;
}
if (nargs != 4) {
ERROR("invalid line ueventd.rc line for '%s'\n", args[0]);
return;
}
/* If path starts with mtd@ lookup the mount number. */
if (!strncmp(name, "mtd@", 4)) {
int n = mtd_name_to_number(name + 4);
if (n >= 0)
asprintf(&tmp, "/dev/mtd/mtd%d", n);
name = tmp;
} else {
int len = strlen(name);
if (name[len - 1] == '*') {
prefix = 1;
name[len - 1] = '\0';
}
}
perm = strtol(args[1], &endptr, 8);
if (!endptr || *endptr != '\0') {
ERROR("invalid mode '%s'\n", args[1]);
free(tmp);
return;
}
ret = get_android_id(args[2]);
if (ret < 0) {
ERROR("invalid uid '%s'\n", args[2]);
free(tmp);
return;
}
uid = ret;
ret = get_android_id(args[3]);
if (ret < 0) {
ERROR("invalid gid '%s'\n", args[3]);
free(tmp);
return;
}
gid = ret;
add_dev_perms(name, attr, perm, uid, gid, prefix);
free(tmp);
}
system/core/init/ueventd.h
+22
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@@ -0,0 +1,22 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_UEVENTD_H_
#define _INIT_UEVENTD_H_
int ueventd_main(int argc, char **argv);
#endif
system/core/init/ueventd_parser.c
+76
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@@ -0,0 +1,76 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdio.h>
#include <unistd.h>
#include <stdarg.h>
#include <string.h>
#include "ueventd_parser.h"
#include "parser.h"
#include "log.h"
#include "list.h"
#include "util.h"
static void parse_line_device(struct parse_state *state, int nargs, char **args);
static void parse_config(const char *fn, char *s)
{
struct parse_state state;
char *args[UEVENTD_PARSER_MAXARGS];
int nargs;
nargs = 0;
state.filename = fn;
state.line = 1;
state.ptr = s;
state.nexttoken = 0;
state.parse_line = parse_line_device;
for (;;) {
int token = next_token(&state);
switch (token) {
case T_EOF:
state.parse_line(&state, 0, 0);
return;
case T_NEWLINE:
if (nargs) {
state.parse_line(&state, nargs, args);
nargs = 0;
}
break;
case T_TEXT:
if (nargs < UEVENTD_PARSER_MAXARGS) {
args[nargs++] = state.text;
}
break;
}
}
}
int ueventd_parse_config_file(const char *fn)
{
char *data;
data = read_file(fn, 0);
if (!data) return -1;
parse_config(fn, data);
DUMP();
return 0;
}
static void parse_line_device(struct parse_state* state, int nargs, char **args)
{
set_device_permission(nargs, args);
}
system/core/init/ueventd_parser.h
+25
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@@ -0,0 +1,25 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_UEVENTD_PARSER_H_
#define _INIT_UEVENTD_PARSER_H_
#define UEVENTD_PARSER_MAXARGS 5
int ueventd_parse_config_file(const char *fn);
void set_device_permission(int nargs, char **args);
#endif
system/core/init/util.c
+457
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@@ -0,0 +1,457 @@
/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <time.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>
/* for ANDROID_SOCKET_* */
#include <cutils/sockets.h>
#include <private/android_filesystem_config.h>
#include "log.h"
#include "list.h"
#include "util.h"
static int log_fd = -1;
/* Inital log level before init.rc is parsed and this this is reset. */
static int log_level = LOG_DEFAULT_LEVEL;
void log_set_level(int level) {
log_level = level;
}
void log_init(void)
{
static const char *name = "/dev/__kmsg__";
if (mknod(name, S_IFCHR | 0600, (1 << 8) | 11) == 0) {
log_fd = open(name, O_WRONLY);
fcntl(log_fd, F_SETFD, FD_CLOEXEC);
unlink(name);
}
}
#define LOG_BUF_MAX 512
void log_write(int level, const char *fmt, ...)
{
char buf[LOG_BUF_MAX];
va_list ap;
if (level > log_level) return;
if (log_fd < 0) return;
va_start(ap, fmt);
vsnprintf(buf, LOG_BUF_MAX, fmt, ap);
buf[LOG_BUF_MAX - 1] = 0;
va_end(ap);
write(log_fd, buf, strlen(buf));
}
/*
* android_name_to_id - returns the integer uid/gid associated with the given
* name, or -1U on error.
*/
static unsigned int android_name_to_id(const char *name)
{
struct android_id_info *info = android_ids;
unsigned int n;
for (n = 0; n < android_id_count; n++) {
if (!strcmp(info[n].name, name))
return info[n].aid;
}
return -1U;
}
/*
* decode_uid - decodes and returns the given string, which can be either the
* numeric or name representation, into the integer uid or gid. Returns -1U on
* error.
*/
unsigned int decode_uid(const char *s)
{
unsigned int v;
if (!s || *s == '\0')
return -1U;
if (isalpha(s[0]))
return android_name_to_id(s);
errno = 0;
v = (unsigned int) strtoul(s, 0, 0);
if (errno)
return -1U;
return v;
}
/*
* create_socket - creates a Unix domain socket in ANDROID_SOCKET_DIR
* ("/dev/socket") as dictated in init.rc. This socket is inherited by the
* daemon. We communicate the file descriptor's value via the environment
* variable ANDROID_SOCKET_ENV_PREFIX<name> ("ANDROID_SOCKET_foo").
*/
int create_socket(const char *name, int type, mode_t perm, uid_t uid, gid_t gid)
{
struct sockaddr_un addr;
int fd, ret;
fd = socket(PF_UNIX, type, 0);
if (fd < 0) {
ERROR("Failed to open socket '%s': %s\n", name, strerror(errno));
return -1;
}
memset(&addr, 0 , sizeof(addr));
addr.sun_family = AF_UNIX;
snprintf(addr.sun_path, sizeof(addr.sun_path), ANDROID_SOCKET_DIR"/%s",
name);
ret = unlink(addr.sun_path);
if (ret != 0 && errno != ENOENT) {
ERROR("Failed to unlink old socket '%s': %s\n", name, strerror(errno));
goto out_close;
}
ret = bind(fd, (struct sockaddr *) &addr, sizeof (addr));
if (ret) {
ERROR("Failed to bind socket '%s': %s\n", name, strerror(errno));
goto out_unlink;
}
chown(addr.sun_path, uid, gid);
chmod(addr.sun_path, perm);
INFO("Created socket '%s' with mode '%o', user '%d', group '%d'\n",
addr.sun_path, perm, uid, gid);
return fd;
out_unlink:
unlink(addr.sun_path);
out_close:
close(fd);
return -1;
}
/* reads a file, making sure it is terminated with \n \0 */
void *read_file(const char *fn, unsigned *_sz)
{
char *data;
int sz;
int fd;
data = 0;
fd = open(fn, O_RDONLY);
if(fd < 0) return 0;
sz = lseek(fd, 0, SEEK_END);
if(sz < 0) goto oops;
if(lseek(fd, 0, SEEK_SET) != 0) goto oops;
data = (char*) malloc(sz + 2);
if(data == 0) goto oops;
if(read(fd, data, sz) != sz) goto oops;
close(fd);
data[sz] = '\n';
data[sz+1] = 0;
if(_sz) *_sz = sz;
return data;
oops:
close(fd);
if(data != 0) free(data);
return 0;
}
void list_init(struct listnode *node)
{
node->next = node;
node->prev = node;
}
void list_add_tail(struct listnode *head, struct listnode *item)
{
item->next = head;
item->prev = head->prev;
head->prev->next = item;
head->prev = item;
}
void list_remove(struct listnode *item)
{
item->next->prev = item->prev;
item->prev->next = item->next;
}
#define MAX_MTD_PARTITIONS 16
static struct {
char name[16];
int number;
} mtd_part_map[MAX_MTD_PARTITIONS];
static int mtd_part_count = -1;
static void find_mtd_partitions(void)
{
int fd;
char buf[1024];
char *pmtdbufp;
ssize_t pmtdsize;
int r;
fd = open("/proc/mtd", O_RDONLY);
if (fd < 0)
return;
buf[sizeof(buf) - 1] = '\0';
pmtdsize = read(fd, buf, sizeof(buf) - 1);
pmtdbufp = buf;
while (pmtdsize > 0) {
int mtdnum, mtdsize, mtderasesize;
char mtdname[16];
mtdname[0] = '\0';
mtdnum = -1;
r = sscanf(pmtdbufp, "mtd%d: %x %x %15s",
&mtdnum, &mtdsize, &mtderasesize, mtdname);
if ((r == 4) && (mtdname[0] == '"')) {
char *x = strchr(mtdname + 1, '"');
if (x) {
*x = 0;
}
INFO("mtd partition %d, %s\n", mtdnum, mtdname + 1);
if (mtd_part_count < MAX_MTD_PARTITIONS) {
strcpy(mtd_part_map[mtd_part_count].name, mtdname + 1);
mtd_part_map[mtd_part_count].number = mtdnum;
mtd_part_count++;
} else {
ERROR("too many mtd partitions\n");
}
}
while (pmtdsize > 0 && *pmtdbufp != '\n') {
pmtdbufp++;
pmtdsize--;
}
if (pmtdsize > 0) {
pmtdbufp++;
pmtdsize--;
}
}
close(fd);
}
int mtd_name_to_number(const char *name)
{
int n;
if (mtd_part_count < 0) {
mtd_part_count = 0;
find_mtd_partitions();
}
for (n = 0; n < mtd_part_count; n++) {
if (!strcmp(name, mtd_part_map[n].name)) {
return mtd_part_map[n].number;
}
}
return -1;
}
/*
* gettime() - returns the time in seconds of the system's monotonic clock or
* zero on error.
*/
time_t gettime(void)
{
struct timespec ts;
int ret;
ret = clock_gettime(CLOCK_MONOTONIC, &ts);
if (ret < 0) {
ERROR("clock_gettime(CLOCK_MONOTONIC) failed: %s\n", strerror(errno));
return 0;
}
return ts.tv_sec;
}
int mkdir_recursive(const char *pathname, mode_t mode)
{
char buf[128];
const char *slash;
const char *p = pathname;
int width;
int ret;
struct stat info;
while ((slash = strchr(p, '/')) != NULL) {
width = slash - pathname;
p = slash + 1;
if (width < 0)
break;
if (width == 0)
continue;
if ((unsigned int)width > sizeof(buf) - 1) {
ERROR("path too long for mkdir_recursive\n");
return -1;
}
memcpy(buf, pathname, width);
buf[width] = 0;
if (stat(buf, &info) != 0) {
ret = mkdir(buf, mode);
if (ret && errno != EEXIST)
return ret;
}
}
ret = mkdir(pathname, mode);
if (ret && errno != EEXIST)
return ret;
return 0;
}
void sanitize(char *s)
{
if (!s)
return;
while (isalnum(*s))
s++;
*s = 0;
}
void make_link(const char *oldpath, const char *newpath)
{
int ret;
char buf[256];
char *slash;
int width;
slash = strrchr(newpath, '/');
if (!slash)
return;
width = slash - newpath;
if (width <= 0 || width > (int)sizeof(buf) - 1)
return;
memcpy(buf, newpath, width);
buf[width] = 0;
ret = mkdir_recursive(buf, 0755);
if (ret)
ERROR("Failed to create directory %s: %s (%d)\n", buf, strerror(errno), errno);
ret = symlink(oldpath, newpath);
if (ret && errno != EEXIST)
ERROR("Failed to symlink %s to %s: %s (%d)\n", oldpath, newpath, strerror(errno), errno);
}
void remove_link(const char *oldpath, const char *newpath)
{
char path[256];
ssize_t ret;
ret = readlink(newpath, path, sizeof(path) - 1);
if (ret <= 0)
return;
path[ret] = 0;
if (!strcmp(path, oldpath))
unlink(newpath);
}
int wait_for_file(const char *filename, int timeout)
{
struct stat info;
time_t timeout_time = gettime() + timeout;
int ret = -1;
while (gettime() < timeout_time && ((ret = stat(filename, &info)) < 0))
usleep(10000);
return ret;
}
void open_devnull_stdio(void)
{
int fd;
static const char *name = "/dev/__null__";
if (mknod(name, S_IFCHR | 0600, (1 << 8) | 3) == 0) {
fd = open(name, O_RDWR);
unlink(name);
if (fd >= 0) {
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (fd > 2) {
close(fd);
}
return;
}
}
exit(1);
}
void get_hardware_name(char *hardware, unsigned int *revision)
{
char data[1024];
int fd, n;
char *x, *hw, *rev;
/* Hardware string was provided on kernel command line */
if (hardware[0])
return;
fd = open("/proc/cpuinfo", O_RDONLY);
if (fd < 0) return;
n = read(fd, data, 1023);
close(fd);
if (n < 0) return;
data[n] = 0;
hw = strstr(data, "\nHardware");
rev = strstr(data, "\nRevision");
if (hw) {
x = strstr(hw, ": ");
if (x) {
x += 2;
n = 0;
while (*x && !isspace(*x)) {
hardware[n++] = tolower(*x);
x++;
if (n == 31) break;
}
hardware[n] = 0;
}
}
if (rev) {
x = strstr(rev, ": ");
if (x) {
*revision = strtoul(x + 2, 0, 16);
}
}
}
system/core/init/util.h
+41
View File
@@ -0,0 +1,41 @@
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _INIT_UTIL_H_
#define _INIT_UTIL_H_
#include <sys/stat.h>
#include <sys/types.h>
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
static const char *coldboot_done = "/dev/.coldboot_done";
int mtd_name_to_number(const char *name);
int create_socket(const char *name, int type, mode_t perm,
uid_t uid, gid_t gid);
void *read_file(const char *fn, unsigned *_sz);
time_t gettime(void);
unsigned int decode_uid(const char *s);
int mkdir_recursive(const char *pathname, mode_t mode);
void sanitize(char *p);
void make_link(const char *oldpath, const char *newpath);
void remove_link(const char *oldpath, const char *newpath);
int wait_for_file(const char *filename, int timeout);
void open_devnull_stdio(void);
void get_hardware_name(char *hardware, unsigned int *revision);
#endif