148 lines
3.2 KiB
C
148 lines
3.2 KiB
C
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <poll.h>
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#include <fcntl.h>
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <ctype.h>
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#include <private/android_filesystem_config.h>
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#include "ueventd.h"
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#include "log.h"
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#include "util.h"
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#include "devices.h"
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#include "ueventd_parser.h"
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static char hardware[32];
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static unsigned revision = 0;
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int ueventd_main(int argc, char **argv)
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{
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struct pollfd ufd;
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int nr;
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char tmp[32];
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open_devnull_stdio();
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log_init();
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INFO("starting ueventd\n");
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get_hardware_name(hardware, &revision);
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ueventd_parse_config_file("/ueventd.rc");
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snprintf(tmp, sizeof(tmp), "/ueventd.%s.rc", hardware);
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ueventd_parse_config_file(tmp);
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device_init();
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ufd.events = POLLIN;
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ufd.fd = get_device_fd();
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while(1) {
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ufd.revents = 0;
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nr = poll(&ufd, 1, -1);
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if (nr <= 0)
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continue;
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if (ufd.revents == POLLIN)
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handle_device_fd();
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}
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}
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static int get_android_id(const char *id)
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{
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(android_ids); i++)
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if (!strcmp(id, android_ids[i].name))
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return android_ids[i].aid;
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return 0;
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}
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void set_device_permission(int nargs, char **args)
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{
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char *name;
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char *attr = 0;
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mode_t perm;
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uid_t uid;
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gid_t gid;
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int prefix = 0;
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char *endptr;
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int ret;
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char *tmp = 0;
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if (nargs == 0)
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return;
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if (args[0][0] == '#')
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return;
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name = args[0];
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if (!strncmp(name,"/sys/", 5) && (nargs == 5)) {
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INFO("/sys/ rule %s %s\n",args[0],args[1]);
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attr = args[1];
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args++;
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nargs--;
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}
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if (nargs != 4) {
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ERROR("invalid line ueventd.rc line for '%s'\n", args[0]);
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return;
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}
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/* If path starts with mtd@ lookup the mount number. */
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if (!strncmp(name, "mtd@", 4)) {
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int n = mtd_name_to_number(name + 4);
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if (n >= 0)
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asprintf(&tmp, "/dev/mtd/mtd%d", n);
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name = tmp;
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} else {
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int len = strlen(name);
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if (name[len - 1] == '*') {
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prefix = 1;
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name[len - 1] = '\0';
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}
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}
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perm = strtol(args[1], &endptr, 8);
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if (!endptr || *endptr != '\0') {
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ERROR("invalid mode '%s'\n", args[1]);
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free(tmp);
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return;
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}
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ret = get_android_id(args[2]);
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if (ret < 0) {
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ERROR("invalid uid '%s'\n", args[2]);
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free(tmp);
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return;
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}
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uid = ret;
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ret = get_android_id(args[3]);
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if (ret < 0) {
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ERROR("invalid gid '%s'\n", args[3]);
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free(tmp);
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return;
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}
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gid = ret;
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add_dev_perms(name, attr, perm, uid, gid, prefix);
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free(tmp);
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}
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