int main(int argc, char **argv)
{
if (argc != 2) {
fprintf(stderr, "usage: %s partition\n", argv[0]);
return 2;
}
return erase_raw_partition(NULL, argv[1]);
}
int format_unknown_device(const char *device, const char* path, const char *fs_type)
{
LOGI("Formatting unknown device.\n");
// device may simply be a name, like "system"
if (device[0] != '/')
return erase_raw_partition(device);
// if this is SDEXT:, don't worry about it if it does not exist.
if (0 == strcmp(path, "/sd-ext"))
{
struct stat st;
Volume *vol = volume_for_path("/sd-ext");
if (vol == NULL || 0 != stat(vol->device, &st))
{
ui_print("No app2sd partition found. Skipping format of /sd-ext.\n");
return 0;
}
}
if (NULL != fs_type) {
if (strcmp("ext3", fs_type) == 0) {
LOGI("Formatting ext3 device.\n");
if (0 != ensure_path_unmounted(path)) {
LOGE("Error while unmounting %s.\n", path);
return -12;
}
return format_ext3_device(device);
}
if (strcmp("ext2", fs_type) == 0) {
LOGI("Formatting ext2 device.\n");
if (0 != ensure_path_unmounted(path)) {
LOGE("Error while unmounting %s.\n", path);
return -12;
}
return format_ext2_device(device);
}
}
if (0 != ensure_path_mounted(path))
{
ui_print("Error mounting %s!\n", path);
ui_print("Skipping format...\n");
return 0;
}
static char tmp[PATH_MAX];
sprintf(tmp, "rm -rf %s/*", path);
__system(tmp);
sprintf(tmp, "rm -rf %s/.*", path);
__system(tmp);
ensure_path_unmounted(path);
return 0;
}
int format_unknown_device(const char *device, const char* path, const char *fs_type)
{
LOGI("Formatting unknown device.\n");
if (fs_type != NULL && get_flash_type(fs_type) != UNSUPPORTED)
return erase_raw_partition(fs_type, device);
// if this is SDEXT:, don't worry about it if it does not exist.
if (0 == strcmp(path, "/sd-ext"))
{
struct stat st;
Volume *vol = volume_for_path("/sd-ext");
if (vol == NULL || 0 != stat(vol->device, &st))
{
ui_print("No app2sd partition found. Skipping format of /sd-ext.\n");
return 0;
}
}
if (NULL != fs_type) {
if (strcmp("ext3", fs_type) == 0) {
LOGI("Formatting ext3 device.\n");
if (0 != ensure_path_unmounted(path)) {
LOGE("Error while unmounting %s.\n", path);
return -12;
}
return format_ext3_device(device);
}
if (strcmp("ext2", fs_type) == 0) {
LOGI("Formatting ext2 device.\n");
if (0 != ensure_path_unmounted(path)) {
LOGE("Error while unmounting %s.\n", path);
return -12;
}
return format_ext2_device(device);
}
}
if (0 != ensure_path_mounted(path))
{
ui_print("Error mounting %s!\n", path);
ui_print("Skipping format...\n");
return 0;
}
static char tmp[PATH_MAX];
if (strcmp(path, "/data") == 0) {
sprintf(tmp, "cd /data ; for f in $(ls -a | grep -v ^media$); do rm -rf $f; done");
__system(tmp);
// if the /data/media sdcard has already been migrated for android 4.2,
// prevent the migration from happening again by writing the .layout_version
struct stat st;
if (0 == lstat("/data/media/0", &st)) {
char* layout_version = "2";
FILE* f = fopen("/data/.layout_version", "wb");
if (NULL != f) {
fwrite(layout_version, 1, 2, f);
fclose(f);
}
else {
LOGI("error opening /data/.layout_version for write.\n");
}
}
else {
LOGI("/data/media/0 not found. migration may occur.\n");
}
}
else {
sprintf(tmp, "rm -rf %s/*", path);
__system(tmp);
sprintf(tmp, "rm -rf %s/.*", path);
__system(tmp);
}
ensure_path_unmounted(path);
return 0;
}
int format_unknown_device(const char *device, const char* path, const char *fs_type)
{
LOGI("Formatting unknown device.\n");
if (fs_type != NULL && get_flash_type(fs_type) != UNSUPPORTED)
return erase_raw_partition(fs_type, device);
// if this is SDEXT:, don't worry about it if it does not exist.
if (0 == strcmp(path, "/sd-ext"))
{
struct stat st;
Volume *vol = volume_for_path("/sd-ext");
if (vol == NULL || 0 != stat(vol->device, &st))
{
ui_print("No app2sd partition found. Skipping format of /sd-ext.\n");
return 0;
}
}
if (NULL != fs_type) {
if (strcmp("ext3", fs_type) == 0) {
LOGI("Formatting ext3 device.\n");
if (0 != ensure_path_unmounted(path)) {
LOGE("Error while unmounting %s.\n", path);
return -12;
}
return format_ext3_device(device);
}
if (strcmp("ext2", fs_type) == 0) {
LOGI("Formatting ext2 device.\n");
if (0 != ensure_path_unmounted(path)) {
LOGE("Error while unmounting %s.\n", path);
return -12;
}
return format_ext2_device(device);
}
}
if (0 != ensure_path_mounted(path))
{
ui_print("Error mounting %s!\n", path);
ui_print("Skipping format...\n");
return 0;
}
static char tmp[PATH_MAX];
if (strcmp(path, "/data") == 0) {
sprintf(tmp, "cd /data ; for f in $(ls -a | grep -v ^media$); do rm -rf $f; done");
__system(tmp);
}
else {
sprintf(tmp, "rm -rf %s/*", path);
__system(tmp);
sprintf(tmp, "rm -rf %s/.*", path);
__system(tmp);
}
ensure_path_unmounted(path);
return 0;
}
int format_volume(const char* volume) {
Volume* v = volume_for_path(volume);
if (v == NULL) {
// silent failure for sd-ext
if (strcmp(volume, "/sd-ext") == 0)
return -1;
LOGE("unknown volume \"%s\"\n", volume);
return -1;
}
if (strcmp(v->fs_type, "ramdisk") == 0) {
// you can't format the ramdisk.
LOGE("can't format_volume \"%s\"", volume);
return -1;
}
if (strcmp(v->mount_point, volume) != 0) {
#if 0
LOGE("can't give path \"%s\" to format_volume\n", volume);
return -1;
#endif
return format_unknown_device(v->device, volume, NULL);
}
if (ensure_path_unmounted(volume) != 0) {
LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
return -1;
}
if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0) {
mtd_scan_partitions();
const MtdPartition* partition = mtd_find_partition_by_name(v->device);
if (partition == NULL) {
LOGE("format_volume: no MTD partition \"%s\"\n", v->device);
return -1;
}
MtdWriteContext *write = mtd_write_partition(partition);
if (write == NULL) {
LOGW("format_volume: can't open MTD \"%s\"\n", v->device);
return -1;
} else if (mtd_erase_blocks(write, -1) == (off_t) -1) {
LOGW("format_volume: can't erase MTD \"%s\"\n", v->device);
mtd_write_close(write);
return -1;
} else if (mtd_write_close(write)) {
LOGW("format_volume: can't close MTD \"%s\"\n", v->device);
return -1;
}
return 0;
}
if (strcmp(v->fs_type, "emmc") == 0) {
return erase_raw_partition(v->device);
}
if (strcmp(v->fs_type, "ext4") == 0) {
reset_ext4fs_info();
int result = make_ext4fs(v->device, NULL, NULL, 0, 0, 0);
if (result != 0) {
LOGE("format_volume: make_extf4fs failed on %s\n", v->device);
return -1;
}
return 0;
}
#if 0
LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
return -1;
#endif
return format_unknown_device(v->device, volume, v->fs_type);
}