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Commit 43896f61 authored by Debajit Ghosh's avatar Debajit Ghosh
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Remove (experimental) backup tool.

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backup/Android.mk deleted 100644 → 0
View file @ 894b139a
# Copyright 2009 The Android Open Source Project
LOCAL_PATH:= $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES:= backup.cpp
LOCAL_SHARED_LIBRARIES := libcutils libc
LOCAL_MODULE:= rawbu
LOCAL_MODULE_PATH := $(TARGET_OUT_OPTIONAL_EXECUTABLES)
LOCAL_MODULE_TAGS := debug
include $(BUILD_EXECUTABLE)
backup/NOTICE deleted 100644 → 0
View file @ 894b139a
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
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http://www.apache.org/licenses/
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"Work" shall mean the work of authorship, whether in Source or
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"Contribution" shall mean any work of authorship, including
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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
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4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
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meet the following conditions:
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Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
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backup/backup.cpp deleted 100644 → 0
View file @ 894b139a
// 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");
}
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