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-rw-r--r--backup/backup.cpp700
1 files changed, 0 insertions, 700 deletions
diff --git a/backup/backup.cpp b/backup/backup.cpp
deleted file mode 100644
index 22c016d7..00000000
--- a/backup/backup.cpp
+++ /dev/null
@@ -1,700 +0,0 @@
-// Copyright 2009 The Android Open Source Project
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <stdarg.h>
-#include <string.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <time.h>
-#include <dirent.h>
-#include <errno.h>
-#include <assert.h>
-#include <ctype.h>
-#include <utime.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include <cutils/properties.h>
-
-#include <private/android_filesystem_config.h>
-
-#ifndef PATH_MAX
-#define PATH_MAX 4096
-#endif
-
-#define FILE_VERSION 0xffff0001
-
-namespace android {
-
-static char nameBuffer[PATH_MAX];
-static struct stat statBuffer;
-
-static char copyBuffer[8192];
-
-#define SPECIAL_NO_TOUCH 0
-#define SPECIAL_NO_BACKUP 1
-
-struct special_dir {
- const char* path;
- int type;
-};
-
-/* Directory paths that we will not backup/restore */
-static const struct special_dir SKIP_PATHS[] = {
- { "/data/misc", SPECIAL_NO_TOUCH },
- { "/data/system/batterystats.bin", SPECIAL_NO_TOUCH },
- { "/data/system/location", SPECIAL_NO_TOUCH },
- { "/data/dalvik-cache", SPECIAL_NO_BACKUP },
- { NULL, 0 },
-};
-
-/* This is just copied from the shell's built-in wipe command. */
-static int wipe (const char *path)
-{
- DIR *dir;
- struct dirent *de;
- int ret;
- int i;
-
- dir = opendir(path);
-
- if (dir == NULL) {
- fprintf (stderr, "Error opendir'ing %s: %s\n",
- path, strerror(errno));
- return 0;
- }
-
- char *filenameOffset;
-
- strcpy(nameBuffer, path);
- strcat(nameBuffer, "/");
-
- filenameOffset = nameBuffer + strlen(nameBuffer);
-
- for (;;) {
- de = readdir(dir);
-
- if (de == NULL) {
- break;
- }
-
- if (0 == strcmp(de->d_name, ".")
- || 0 == strcmp(de->d_name, "..")
- || 0 == strcmp(de->d_name, "lost+found")
- ) {
- continue;
- }
-
- strcpy(filenameOffset, de->d_name);
- bool noBackup = false;
-
- /* See if this is a path we should skip. */
- for (i = 0; SKIP_PATHS[i].path; i++) {
- if (strcmp(SKIP_PATHS[i].path, nameBuffer) == 0) {
- if (SKIP_PATHS[i].type == SPECIAL_NO_BACKUP) {
- // In this case we aren't backing up the directory --
- // we do want to wipe its contents, but not the
- // directory itself, since the restore file won't
- // contain the directory.
- noBackup = true;
- }
- break;
- }
- }
- if (!noBackup && SKIP_PATHS[i].path != NULL) {
- continue;
- }
-
- ret = lstat (nameBuffer, &statBuffer);
-
- if (ret != 0) {
- fprintf(stderr, "warning -- stat() error on '%s': %s\n",
- nameBuffer, strerror(errno));
- continue;
- }
-
- if(S_ISDIR(statBuffer.st_mode)) {
- int i;
- char *newpath;
-
- newpath = strdup(nameBuffer);
- if (wipe(newpath) == 0) {
- free(newpath);
- closedir(dir);
- return 0;
- }
-
- if (!noBackup) {
- ret = rmdir(newpath);
- if (ret != 0) {
- fprintf(stderr, "warning -- rmdir() error on '%s': %s\n",
- newpath, strerror(errno));
- }
- }
-
- free(newpath);
-
- strcpy(nameBuffer, path);
- strcat(nameBuffer, "/");
-
- } else {
- ret = unlink(nameBuffer);
-
- if (ret != 0) {
- fprintf(stderr, "warning -- unlink() error on '%s': %s\n",
- nameBuffer, strerror(errno));
- }
- }
- }
-
- closedir(dir);
-
- return 1;
-}
-
-static int write_int32(FILE* fh, int32_t val)
-{
- int res = fwrite(&val, 1, sizeof(val), fh);
- if (res != sizeof(val)) {
- fprintf(stderr, "unable to write int32 (%d bytes): %s\n", res, strerror(errno));
- return 0;
- }
-
- return 1;
-}
-
-static int write_int64(FILE* fh, int64_t val)
-{
- int res = fwrite(&val, 1, sizeof(val), fh);
- if (res != sizeof(val)) {
- fprintf(stderr, "unable to write int64 (%d bytes): %s\n", res, strerror(errno));
- return 0;
- }
-
- return 1;
-}
-
-static int copy_file(FILE* dest, FILE* src, off_t size, const char* destName,
- const char* srcName)
-{
- errno = 0;
-
- off_t origSize = size;
-
- while (size > 0) {
- int amt = size > (off_t)sizeof(copyBuffer) ? sizeof(copyBuffer) : (int)size;
- int readLen = fread(copyBuffer, 1, amt, src);
- if (readLen <= 0) {
- if (srcName != NULL) {
- fprintf(stderr, "unable to read source (%d of %ld bytes) file '%s': %s\n",
- amt, origSize, srcName, errno != 0 ? strerror(errno) : "unexpected EOF");
- } else {
- fprintf(stderr, "unable to read buffer (%d of %ld bytes): %s\n",
- amt, origSize, errno != 0 ? strerror(errno) : "unexpected EOF");
- }
- return 0;
- }
- int writeLen = fwrite(copyBuffer, 1, readLen, dest);
- if (writeLen != readLen) {
- if (destName != NULL) {
- fprintf(stderr, "unable to write file (%d of %d bytes) '%s': '%s'\n",
- writeLen, readLen, destName, strerror(errno));
- } else {
- fprintf(stderr, "unable to write buffer (%d of %d bytes): '%s'\n",
- writeLen, readLen, strerror(errno));
- }
- return 0;
- }
- size -= readLen;
- }
- return 1;
-}
-
-#define TYPE_END 0
-#define TYPE_DIR 1
-#define TYPE_FILE 2
-
-static int write_header(FILE* fh, int type, const char* path, const struct stat* st)
-{
- int pathLen = strlen(path);
- if (!write_int32(fh, type)) return 0;
- if (!write_int32(fh, pathLen)) return 0;
- if (fwrite(path, 1, pathLen, fh) != (size_t)pathLen) {
- fprintf(stderr, "unable to write: %s\n", strerror(errno));
- return 0;
- }
-
- if (!write_int32(fh, st->st_uid)) return 0;
- if (!write_int32(fh, st->st_gid)) return 0;
- if (!write_int32(fh, st->st_mode)) return 0;
- if (!write_int64(fh, ((int64_t)st->st_atime)*1000*1000*1000)) return 0;
- if (!write_int64(fh, ((int64_t)st->st_mtime)*1000*1000*1000)) return 0;
- if (!write_int64(fh, ((int64_t)st->st_ctime)*1000*1000*1000)) return 0;
-
- return 1;
-}
-
-static int backup_dir(FILE* fh, const char* srcPath)
-{
- DIR *dir;
- struct dirent *de;
- char* fullPath = NULL;
- int srcLen = strlen(srcPath);
- int result = 1;
- int i;
-
- dir = opendir(srcPath);
-
- if (dir == NULL) {
- fprintf (stderr, "error opendir'ing '%s': %s\n",
- srcPath, strerror(errno));
- return 0;
- }
-
- for (;;) {
- de = readdir(dir);
-
- if (de == NULL) {
- break;
- }
-
- if (0 == strcmp(de->d_name, ".")
- || 0 == strcmp(de->d_name, "..")
- || 0 == strcmp(de->d_name, "lost+found")
- ) {
- continue;
- }
-
- if (fullPath == NULL) {
- free(fullPath);
- }
- fullPath = (char*)malloc(srcLen + strlen(de->d_name) + 2);
- strcpy(fullPath, srcPath);
- fullPath[srcLen] = '/';
- strcpy(fullPath+srcLen+1, de->d_name);
-
- /* See if this is a path we should skip. */
- for (i = 0; SKIP_PATHS[i].path; i++) {
- if (strcmp(SKIP_PATHS[i].path, fullPath) == 0) {
- break;
- }
- }
- if (SKIP_PATHS[i].path != NULL) {
- continue;
- }
-
- int ret = lstat(fullPath, &statBuffer);
-
- if (ret != 0) {
- fprintf(stderr, "stat() error on '%s': %s\n",
- fullPath, strerror(errno));
- result = 0;
- goto done;
- }
-
- if(S_ISDIR(statBuffer.st_mode)) {
- printf("Processing dir %s...\n", fullPath);
-
- if (write_header(fh, TYPE_DIR, fullPath, &statBuffer) == 0) {
- result = 0;
- goto done;
- }
- if (backup_dir(fh, fullPath) == 0) {
- result = 0;
- goto done;
- }
- } else {
- printf("Processing file %s...\n", fullPath);
-
- if (write_header(fh, TYPE_FILE, fullPath, &statBuffer) == 0) {
- result = 0;
- goto done;
- }
-
- off_t size = statBuffer.st_size;
- if (!write_int64(fh, size)) {
- result = 0;
- goto done;
- }
-
- FILE* src = fopen(fullPath, "r");
- if (src == NULL) {
- fprintf(stderr, "unable to open source file '%s': %s\n",
- fullPath, strerror(errno));
- result = 0;
- goto done;
- }
-
- int copyres = copy_file(fh, src, size, NULL, fullPath);
- fclose(src);
- if (!copyres) {
- result = 0;
- goto done;
- }
- }
- }
-
-done:
- if (fullPath != NULL) {
- free(fullPath);
- }
-
- closedir(dir);
-
- return result;
-}
-
-static int backup_data(const char* destPath)
-{
- int res = -1;
-
- FILE* fh = fopen(destPath, "w");
- if (fh == NULL) {
- fprintf(stderr, "unable to open destination '%s': %s\n",
- destPath, strerror(errno));
- return -1;
- }
-
- printf("Backing up /data to %s...\n", destPath);
-
- if (!write_int32(fh, FILE_VERSION)) goto done;
- if (!backup_dir(fh, "/data")) goto done;
- if (!write_int32(fh, 0)) goto done;
-
- res = 0;
-
-done:
- if (fflush(fh) != 0) {
- fprintf(stderr, "error flushing destination '%s': %s\n",
- destPath, strerror(errno));
- res = -1;
- goto donedone;
- }
- if (fsync(fileno(fh)) != 0) {
- fprintf(stderr, "error syncing destination '%s': %s\n",
- destPath, strerror(errno));
- res = -1;
- goto donedone;
- }
- fclose(fh);
- sync();
-
-donedone:
- return res;
-}
-
-static int32_t read_int32(FILE* fh, int32_t defVal)
-{
- int32_t val;
- if (fread(&val, 1, sizeof(val), fh) != sizeof(val)) {
- fprintf(stderr, "unable to read: %s\n", strerror(errno));
- return defVal;
- }
-
- return val;
-}
-
-static int64_t read_int64(FILE* fh, int64_t defVal)
-{
- int64_t val;
- if (fread(&val, 1, sizeof(val), fh) != sizeof(val)) {
- fprintf(stderr, "unable to read: %s\n", strerror(errno));
- return defVal;
- }
-
- return val;
-}
-
-static int read_header(FILE* fh, int* type, char** path, struct stat* st)
-{
- *type = read_int32(fh, -1);
- if (*type == TYPE_END) {
- return 1;
- }
-
- if (*type < 0) {
- fprintf(stderr, "bad token %d in restore file\n", *type);
- return 0;
- }
-
- int32_t pathLen = read_int32(fh, -1);
- if (pathLen <= 0) {
- fprintf(stderr, "bad path length %d in restore file\n", pathLen);
- return 0;
- }
- char* readPath = (char*)malloc(pathLen+1);
- if (fread(readPath, 1, pathLen, fh) != (size_t)pathLen) {
- fprintf(stderr, "truncated path in restore file\n");
- free(readPath);
- return 0;
- }
- readPath[pathLen] = 0;
- *path = readPath;
-
- st->st_uid = read_int32(fh, -1);
- if (st->st_uid == (uid_t)-1) {
- fprintf(stderr, "bad uid in restore file at '%s'\n", readPath);
- return 0;
- }
- st->st_gid = read_int32(fh, -1);
- if (st->st_gid == (gid_t)-1) {
- fprintf(stderr, "bad gid in restore file at '%s'\n", readPath);
- return 0;
- }
- st->st_mode = read_int32(fh, -1);
- if (st->st_mode == (mode_t)-1) {
- fprintf(stderr, "bad mode in restore file at '%s'\n", readPath);
- return 0;
- }
- int64_t ltime = read_int64(fh, -1);
- if (ltime < 0) {
- fprintf(stderr, "bad atime in restore file at '%s'\n", readPath);
- return 0;
- }
- st->st_atime = (time_t)(ltime/1000/1000/1000);
- ltime = read_int64(fh, -1);
- if (ltime < 0) {
- fprintf(stderr, "bad mtime in restore file at '%s'\n", readPath);
- return 0;
- }
- st->st_mtime = (time_t)(ltime/1000/1000/1000);
- ltime = read_int64(fh, -1);
- if (ltime < 0) {
- fprintf(stderr, "bad ctime in restore file at '%s'\n", readPath);
- return 0;
- }
- st->st_ctime = (time_t)(ltime/1000/1000/1000);
-
- st->st_mode &= (S_IRWXU|S_IRWXG|S_IRWXO);
-
- return 1;
-}
-
-static int restore_data(const char* srcPath)
-{
- int res = -1;
-
- FILE* fh = fopen(srcPath, "r");
- if (fh == NULL) {
- fprintf(stderr, "Unable to open source '%s': %s\n",
- srcPath, strerror(errno));
- return -1;
- }
-
- if (read_int32(fh, 0) != (int32_t)FILE_VERSION) {
- fprintf(stderr, "Restore file has bad version\n");
- goto done;
- }
-
- printf("Wiping contents of /data...\n");
- if (!wipe("/data")) {
- goto done;
- }
-
- printf("Restoring from %s to /data...\n", srcPath);
-
- while (1) {
- int type;
- char* path = NULL;
- if (read_header(fh, &type, &path, &statBuffer) == 0) {
- goto done;
- }
- if (type == 0) {
- break;
- }
-
- const char* typeName = "?";
-
- if (type == TYPE_DIR) {
- typeName = "dir";
-
- printf("Processing dir %s...\n", path);
-
- if (mkdir(path, statBuffer.st_mode) != 0) {
- if (errno != EEXIST) {
- fprintf(stderr, "unable to create directory '%s': %s\n",
- path, strerror(errno));
- free(path);
- goto done;
- }
- }
-
- } else if (type == TYPE_FILE) {
- typeName = "file";
- off_t size = read_int64(fh, -1);
- if (size < 0) {
- fprintf(stderr, "bad file size %ld in restore file\n", size);
- free(path);
- goto done;
- }
-
- printf("Processing file %s...\n", path);
-
- FILE* dest = fopen(path, "w");
- if (dest == NULL) {
- fprintf(stderr, "unable to open destination file '%s': %s\n",
- path, strerror(errno));
- free(path);
- goto done;
- }
-
- int copyres = copy_file(dest, fh, size, path, NULL);
- fclose(dest);
- if (!copyres) {
- free(path);
- goto done;
- }
-
- } else {
- fprintf(stderr, "unknown node type %d\n", type);
- goto done;
- }
-
- // Do this even for directories, since the dir may have already existed
- // so we need to make sure it gets the correct mode.
- if (chmod(path, statBuffer.st_mode&(S_IRWXU|S_IRWXG|S_IRWXO)) != 0) {
- fprintf(stderr, "unable to chmod destination %s '%s' to 0x%x: %s\n",
- typeName, path, statBuffer.st_mode, strerror(errno));
- free(path);
- goto done;
- }
-
- if (chown(path, statBuffer.st_uid, statBuffer.st_gid) != 0) {
- fprintf(stderr, "unable to chown destination %s '%s' to uid %d / gid %d: %s\n",
- typeName, path, (int)statBuffer.st_uid, (int)statBuffer.st_gid, strerror(errno));
- free(path);
- goto done;
- }
-
- struct utimbuf timbuf;
- timbuf.actime = statBuffer.st_atime;
- timbuf.modtime = statBuffer.st_mtime;
- if (utime(path, &timbuf) != 0) {
- fprintf(stderr, "unable to utime destination %s '%s': %s\n",
- typeName, path, strerror(errno));
- free(path);
- goto done;
- }
-
-
- free(path);
- }
-
- res = 0;
-
-done:
- fclose(fh);
-
- return res;
-}
-
-static void show_help(const char *cmd)
-{
- fprintf(stderr,"Usage: %s COMMAND [options] [backup-file-path]\n", cmd);
-
- fprintf(stderr, "commands are:\n"
- " help Show this help text.\n"
- " backup Perform a backup of /data.\n"
- " restore Perform a restore of /data.\n");
- fprintf(stderr, "options include:\n"
- " -h Show this help text.\n");
- fprintf(stderr, "\nThe %s command allows you to perform low-level\n"
- "backup and restore of the /data partition. This is\n"
- "where all user data is kept, allowing for a fairly\n"
- "complete restore of a device's state. Note that\n"
- "because this is low-level, it will only work across\n"
- "builds of the same (or very similar) device software.\n",
- cmd);
-}
-
-} /* namespace android */
-
-int main (int argc, char **argv)
-{
- int restore = 0;
-
- if (getuid() != AID_ROOT) {
- fprintf(stderr, "error -- %s must run as root\n", argv[0]);
- exit(-1);
- }
-
- if (argc < 2) {
- fprintf(stderr, "No command specified.\n");
- android::show_help(argv[0]);
- exit(-1);
- }
-
- if (0 == strcmp(argv[1], "restore")) {
- restore = 1;
- } else if (0 == strcmp(argv[1], "help")) {
- android::show_help(argv[0]);
- exit(0);
- } else if (0 != strcmp(argv[1], "backup")) {
- fprintf(stderr, "Unknown command: %s\n", argv[1]);
- android::show_help(argv[0]);
- exit(-1);
- }
-
- optind = 2;
-
- for (;;) {
- int ret;
-
- ret = getopt(argc, argv, "h");
-
- if (ret < 0) {
- break;
- }
-
- switch(ret) {
- case 'h':
- android::show_help(argv[0]);
- exit(0);
- break;
-
- default:
- fprintf(stderr,"Unrecognized Option\n");
- android::show_help(argv[0]);
- exit(-1);
- break;
- }
- }
-
- const char* backupFile = "/sdcard/backup.dat";
-
- if (argc > optind) {
- backupFile = argv[optind];
- optind++;
- if (argc != optind) {
- fprintf(stderr, "Too many arguments\n");
- android::show_help(argv[0]);
- exit(-1);
- }
- }
-
- printf("Stopping system...\n");
- property_set("ctl.stop", "runtime");
- property_set("ctl.stop", "zygote");
- sleep(1);
-
- int res;
- if (restore) {
- res = android::restore_data(backupFile);
- if (res != 0) {
- // Don't restart system, since the data partition is hosed.
- return res;
- }
- printf("Restore complete! Restarting system, cross your fingers...\n");
- } else {
- res = android::backup_data(backupFile);
- if (res == 0) {
- printf("Backup complete! Restarting system...\n");
- } else {
- printf("Restarting system...\n");
- }
- }
-
- property_set("ctl.start", "zygote");
- property_set("ctl.start", "runtime");
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-23 18:25:40 +0000