145 lines
5.0 KiB
C
145 lines
5.0 KiB
C
/*
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* Copyright (C) 2008 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 <dirent.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/klog.h>
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#include <sys/reboot.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <time.h>
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#include "private/android_filesystem_config.h"
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// Sentinel file used to track whether we've forced a reboot
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static const char *kMarkerFile = "/data/misc/check-lost+found-rebooted-2";
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// Output file in tombstones directory (first 8K will be uploaded)
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static const char *kOutputDir = "/data/tombstones";
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static const char *kOutputFile = "/data/tombstones/check-lost+found-log";
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// Partitions to check
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static const char *kPartitions[] = { "/system", "/data", "/cache", NULL };
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/*
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* 1. If /data/misc/forced-reboot is missing, touch it & force "unclean" boot.
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* 2. Write a log entry with the number of files in lost+found directories.
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*/
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int main(int argc, char **argv) {
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mkdir(kOutputDir, 0755);
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chown(kOutputDir, AID_SYSTEM, AID_SYSTEM);
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FILE *out = fopen(kOutputFile, "a");
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if (out == NULL) {
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fprintf(stderr, "Can't write %s: %s\n", kOutputFile, strerror(errno));
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return 1;
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}
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// Note: only the first 8K of log will be uploaded, so be terse.
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time_t start = time(NULL);
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fprintf(out, "*** check-lost+found ***\nStarted: %s", ctime(&start));
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struct stat st;
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if (stat(kMarkerFile, &st)) {
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// No reboot marker -- need to force an unclean reboot.
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// But first, try to create the marker file. If that fails,
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// skip the reboot, so we don't get caught in an infinite loop.
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int fd = open(kMarkerFile, O_WRONLY|O_CREAT, 0444);
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if (fd >= 0 && close(fd) == 0) {
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fprintf(out, "Wrote %s, rebooting\n", kMarkerFile);
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fflush(out);
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sync(); // Make sure the marker file is committed to disk
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// If possible, dirty each of these partitions before rebooting,
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// to make sure the filesystem has to do a scan on mount.
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int i;
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for (i = 0; kPartitions[i] != NULL; ++i) {
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char fn[PATH_MAX];
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snprintf(fn, sizeof(fn), "%s/%s", kPartitions[i], "dirty");
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fd = open(fn, O_WRONLY|O_CREAT, 0444);
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if (fd >= 0) { // Don't sweat it if we can't write the file.
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write(fd, fn, sizeof(fn)); // write, you know, some data
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close(fd);
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unlink(fn);
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}
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}
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reboot(RB_AUTOBOOT); // reboot immediately, with dirty filesystems
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fprintf(out, "Reboot failed?!\n");
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exit(1);
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} else {
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fprintf(out, "Can't write %s: %s\n", kMarkerFile, strerror(errno));
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}
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} else {
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fprintf(out, "Found %s\n", kMarkerFile);
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}
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int i;
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for (i = 0; kPartitions[i] != NULL; ++i) {
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char fn[PATH_MAX];
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snprintf(fn, sizeof(fn), "%s/%s", kPartitions[i], "lost+found");
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DIR *dir = opendir(fn);
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if (dir == NULL) {
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fprintf(out, "Can't open %s: %s\n", fn, strerror(errno));
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} else {
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int count = 0;
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struct dirent *ent;
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while ((ent = readdir(dir))) {
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if (strcmp(ent->d_name, ".") && strcmp(ent->d_name, ".."))
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++count;
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}
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closedir(dir);
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if (count > 0) {
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fprintf(out, "OMGZ FOUND %d FILES IN %s\n", count, fn);
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} else {
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fprintf(out, "%s is clean\n", fn);
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}
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}
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}
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char dmesg[131073];
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int len = klogctl(KLOG_READ_ALL, dmesg, sizeof(dmesg) - 1);
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if (len < 0) {
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fprintf(out, "Can't read kernel log: %s\n", strerror(errno));
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} else { // To conserve space, only write lines with certain keywords
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fprintf(out, "--- Kernel log ---\n");
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dmesg[len] = '\0';
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char *saveptr, *line;
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int in_yaffs = 0;
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for (line = strtok_r(dmesg, "\n", &saveptr); line != NULL;
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line = strtok_r(NULL, "\n", &saveptr)) {
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if (strstr(line, "yaffs: dev is")) in_yaffs = 1;
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if (in_yaffs ||
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strstr(line, "yaffs") ||
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strstr(line, "mtd") ||
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strstr(line, "msm_nand")) {
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fprintf(out, "%s\n", line);
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}
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if (strstr(line, "yaffs_read_super: isCheckpointed")) in_yaffs = 0;
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}
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}
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return 0;
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}
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