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author | The Android Open Source Project <initial-contribution@android.com> | 2008-12-18 03:03:49 +0100 |
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committer | The Android Open Source Project <initial-contribution@android.com> | 2008-12-18 03:03:49 +0100 |
commit | ff3d93821e22588ce607c17252334ca2d9ca54a4 (patch) | |
tree | e806acbb6f71dbdafc09df3bc0d8a0a4ae1b7905 /tools/ota/check-lost+found.c | |
parent | Initial Contribution (diff) | |
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Diffstat (limited to 'tools/ota/check-lost+found.c')
-rw-r--r-- | tools/ota/check-lost+found.c | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/tools/ota/check-lost+found.c b/tools/ota/check-lost+found.c new file mode 100644 index 000000000..f85627544 --- /dev/null +++ b/tools/ota/check-lost+found.c @@ -0,0 +1,144 @@ +/* + * 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 <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <limits.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/klog.h> +#include <sys/reboot.h> +#include <sys/stat.h> +#include <sys/types.h> +#include <time.h> + +#include "private/android_filesystem_config.h" + +// Sentinel file used to track whether we've forced a reboot +static const char *kMarkerFile = "/data/misc/check-lost+found-rebooted-2"; + +// Output file in tombstones directory (first 8K will be uploaded) +static const char *kOutputDir = "/data/tombstones"; +static const char *kOutputFile = "/data/tombstones/check-lost+found-log"; + +// Partitions to check +static const char *kPartitions[] = { "/system", "/data", "/cache", NULL }; + +/* + * 1. If /data/misc/forced-reboot is missing, touch it & force "unclean" boot. + * 2. Write a log entry with the number of files in lost+found directories. + */ + +int main(int argc, char **argv) { + mkdir(kOutputDir, 0755); + chown(kOutputDir, AID_SYSTEM, AID_SYSTEM); + FILE *out = fopen(kOutputFile, "a"); + if (out == NULL) { + fprintf(stderr, "Can't write %s: %s\n", kOutputFile, strerror(errno)); + return 1; + } + + // Note: only the first 8K of log will be uploaded, so be terse. + time_t start = time(NULL); + fprintf(out, "*** check-lost+found ***\nStarted: %s", ctime(&start)); + + struct stat st; + if (stat(kMarkerFile, &st)) { + // No reboot marker -- need to force an unclean reboot. + // But first, try to create the marker file. If that fails, + // skip the reboot, so we don't get caught in an infinite loop. + + int fd = open(kMarkerFile, O_WRONLY|O_CREAT, 0444); + if (fd >= 0 && close(fd) == 0) { + fprintf(out, "Wrote %s, rebooting\n", kMarkerFile); + fflush(out); + sync(); // Make sure the marker file is committed to disk + + // If possible, dirty each of these partitions before rebooting, + // to make sure the filesystem has to do a scan on mount. + int i; + for (i = 0; kPartitions[i] != NULL; ++i) { + char fn[PATH_MAX]; + snprintf(fn, sizeof(fn), "%s/%s", kPartitions[i], "dirty"); + fd = open(fn, O_WRONLY|O_CREAT, 0444); + if (fd >= 0) { // Don't sweat it if we can't write the file. + write(fd, fn, sizeof(fn)); // write, you know, some data + close(fd); + unlink(fn); + } + } + + reboot(RB_AUTOBOOT); // reboot immediately, with dirty filesystems + fprintf(out, "Reboot failed?!\n"); + exit(1); + } else { + fprintf(out, "Can't write %s: %s\n", kMarkerFile, strerror(errno)); + } + } else { + fprintf(out, "Found %s\n", kMarkerFile); + } + + int i; + for (i = 0; kPartitions[i] != NULL; ++i) { + char fn[PATH_MAX]; + snprintf(fn, sizeof(fn), "%s/%s", kPartitions[i], "lost+found"); + DIR *dir = opendir(fn); + if (dir == NULL) { + fprintf(out, "Can't open %s: %s\n", fn, strerror(errno)); + } else { + int count = 0; + struct dirent *ent; + while ((ent = readdir(dir))) { + if (strcmp(ent->d_name, ".") && strcmp(ent->d_name, "..")) + ++count; + } + closedir(dir); + if (count > 0) { + fprintf(out, "OMGZ FOUND %d FILES IN %s\n", count, fn); + } else { + fprintf(out, "%s is clean\n", fn); + } + } + } + + char dmesg[131073]; + int len = klogctl(KLOG_READ_ALL, dmesg, sizeof(dmesg) - 1); + if (len < 0) { + fprintf(out, "Can't read kernel log: %s\n", strerror(errno)); + } else { // To conserve space, only write lines with certain keywords + fprintf(out, "--- Kernel log ---\n"); + dmesg[len] = '\0'; + char *saveptr, *line; + int in_yaffs = 0; + for (line = strtok_r(dmesg, "\n", &saveptr); line != NULL; + line = strtok_r(NULL, "\n", &saveptr)) { + if (strstr(line, "yaffs: dev is")) in_yaffs = 1; + + if (in_yaffs || + strstr(line, "yaffs") || + strstr(line, "mtd") || + strstr(line, "msm_nand")) { + fprintf(out, "%s\n", line); + } + + if (strstr(line, "yaffs_read_super: isCheckpointed")) in_yaffs = 0; + } + } + + return 0; +} |