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This commit is contained in:
Koushik K. Dutta 2010-02-19 16:50:36 -08:00
parent bf055bb1be
commit 3ab130fa9e
5 changed files with 1099 additions and 0 deletions
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15
dump_image/Android.mk Normal file
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ifneq ($(TARGET_SIMULATOR),true)
ifeq ($(TARGET_ARCH),arm)
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_SRC_FILES := dump_image.c mtdutils.c ../mtdutils/mounts.c
LOCAL_MODULE := recovery_dump_image
LOCAL_MODULE_TAGS := eng
LOCAL_STATIC_LIBRARIES := libcutils libc
LOCAL_MODULE_STEM := dump_image
LOCAL_FORCE_STATIC_EXECUTABLE := true
include $(BUILD_EXECUTABLE)
endif # TARGET_ARCH == arm
endif # !TARGET_SIMULATOR

136
dump_image/dump_image.c Normal file
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/*
* 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 <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include "cutils/log.h"
#include "mtdutils.h"
#ifdef LOG_TAG
#undef LOG_TAG
#endif
#define LOG_TAG "dump_image"
#define BLOCK_SIZE 2048
#define SPARE_SIZE (BLOCK_SIZE >> 5)
void die(const char *msg, ...) {
int err = errno;
va_list args;
va_start(args, msg);
char buf[1024];
vsnprintf(buf, sizeof(buf), msg, args);
va_end(args);
if (err != 0) {
strlcat(buf, ": ", sizeof(buf));
strlcat(buf, strerror(err), sizeof(buf));
}
fprintf(stderr, "%s\n", buf);
exit(1);
}
/* Read a flash partition and write it to an image file. */
int main(int argc, char **argv)
{
ssize_t (*read_func) (MtdReadContext *, char *, size_t);
MtdReadContext *in;
const MtdPartition *partition;
char buf[BLOCK_SIZE + SPARE_SIZE];
size_t partition_size;
size_t read_size;
size_t total;
int fd;
int wrote;
int len;
if (argc != 3) {
fprintf(stderr, "usage: %s partition file.img\n", argv[0]);
return 2;
}
if (mtd_scan_partitions() <= 0)
die("error scanning partitions");
partition = mtd_find_partition_by_name(argv[1]);
if (partition == NULL)
die("can't find %s partition", argv[1]);
if (mtd_partition_info(partition, &partition_size, NULL, NULL)) {
die("can't get info of partition %s", argv[1]);
}
if (!strcmp(argv[2], "-")) {
fd = fileno(stdout);
} else {
fd = open(argv[2], O_WRONLY|O_CREAT|O_TRUNC, 0666);
}
if (fd < 0)
die("error opening %s", argv[2]);
in = mtd_read_partition(partition);
if (in == NULL) {
close(fd);
unlink(argv[2]);
die("error opening %s: %s\n", argv[1], strerror(errno));
}
if (!strcmp(argv[1], "system") ||
!strcmp(argv[1], "cache") ||
!strcmp(argv[1], "userdata")) {
read_size = BLOCK_SIZE + SPARE_SIZE;
read_func = mtd_read_raw;
} else {
read_size = BLOCK_SIZE;
read_func = mtd_read_data;
}
total = 0;
while ((len = read_func(in, buf, read_size)) > 0) {
wrote = write(fd, buf, len);
if (wrote != len) {
close(fd);
unlink(argv[2]);
die("error writing %s", argv[2]);
}
total += BLOCK_SIZE;
}
if (total != partition_size) {
close(fd);
unlink(argv[2]);
die("error reading %s", argv[1]);
}
mtd_read_close(in);
if (close(fd)) {
unlink(argv[2]);
die("error closing %s", argv[2]);
}
return 0;
}

600
dump_image/mtdutils.c Normal file
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/*
* Copyright (C) 2007 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/mount.h> // for _IOW, _IOR, mount()
#include <sys/stat.h>
#include <mtd/mtd-user.h>
#undef NDEBUG
#include <assert.h>
#include "mtdutils.h"
struct MtdPartition {
int device_index;
unsigned int size;
unsigned int erase_size;
char *name;
};
struct MtdReadContext {
const MtdPartition *partition;
char *buffer;
size_t read_size;
size_t consumed;
int fd;
};
struct MtdWriteContext {
const MtdPartition *partition;
char *buffer;
size_t stored;
int fd;
};
typedef struct {
MtdPartition *partitions;
int partitions_allocd;
int partition_count;
} MtdState;
static MtdState g_mtd_state = {
NULL, // partitions
0, // partitions_allocd
-1 // partition_count
};
#define MTD_PROC_FILENAME "/proc/mtd"
int
mtd_scan_partitions()
{
char buf[2048];
const char *bufp;
int fd;
int i;
ssize_t nbytes;
if (g_mtd_state.partitions == NULL) {
const int nump = 32;
MtdPartition *partitions = malloc(nump * sizeof(*partitions));
if (partitions == NULL) {
errno = ENOMEM;
return -1;
}
g_mtd_state.partitions = partitions;
g_mtd_state.partitions_allocd = nump;
memset(partitions, 0, nump * sizeof(*partitions));
}
g_mtd_state.partition_count = 0;
/* Initialize all of the entries to make things easier later.
* (Lets us handle sparsely-numbered partitions, which
* may not even be possible.)
*/
for (i = 0; i < g_mtd_state.partitions_allocd; i++) {
MtdPartition *p = &g_mtd_state.partitions[i];
if (p->name != NULL) {
free(p->name);
p->name = NULL;
}
p->device_index = -1;
}
/* Open and read the file contents.
*/
fd = open(MTD_PROC_FILENAME, O_RDONLY);
if (fd < 0) {
goto bail;
}
nbytes = read(fd, buf, sizeof(buf) - 1);
close(fd);
if (nbytes < 0) {
goto bail;
}
buf[nbytes] = '\0';
/* Parse the contents of the file, which looks like:
*
* # cat /proc/mtd
* dev: size erasesize name
* mtd0: 00080000 00020000 "bootloader"
* mtd1: 00400000 00020000 "mfg_and_gsm"
* mtd2: 00400000 00020000 "0000000c"
* mtd3: 00200000 00020000 "0000000d"
* mtd4: 04000000 00020000 "system"
* mtd5: 03280000 00020000 "userdata"
*/
bufp = buf;
while (nbytes > 0) {
int mtdnum, mtdsize, mtderasesize;
int matches;
char mtdname[64];
mtdname[0] = '\0';
mtdnum = -1;
matches = sscanf(bufp, "mtd%d: %x %x \"%63[^\"]",
&mtdnum, &mtdsize, &mtderasesize, mtdname);
/* This will fail on the first line, which just contains
* column headers.
*/
if (matches == 4) {
MtdPartition *p = &g_mtd_state.partitions[mtdnum];
p->device_index = mtdnum;
p->size = mtdsize;
p->erase_size = mtderasesize;
p->name = strdup(mtdname);
if (p->name == NULL) {
errno = ENOMEM;
goto bail;
}
g_mtd_state.partition_count++;
}
/* Eat the line.
*/
while (nbytes > 0 && *bufp != '\n') {
bufp++;
nbytes--;
}
if (nbytes > 0) {
bufp++;
nbytes--;
}
}
return g_mtd_state.partition_count;
bail:
// keep "partitions" around so we can free the names on a rescan.
g_mtd_state.partition_count = -1;
return -1;
}
const MtdPartition *
mtd_find_partition_by_name(const char *name)
{
if (g_mtd_state.partitions != NULL) {
int i;
for (i = 0; i < g_mtd_state.partitions_allocd; i++) {
MtdPartition *p = &g_mtd_state.partitions[i];
if (p->device_index >= 0 && p->name != NULL) {
if (strcmp(p->name, name) == 0) {
return p;
}
}
}
}
return NULL;
}
int
mtd_mount_partition(const MtdPartition *partition, const char *mount_point,
const char *filesystem, int read_only)
{
const unsigned long flags = MS_NOATIME | MS_NODEV | MS_NODIRATIME;
char devname[64];
int rv = -1;
sprintf(devname, "/dev/block/mtdblock%d", partition->device_index);
if (!read_only) {
rv = mount(devname, mount_point, filesystem, flags, NULL);
}
if (read_only || rv < 0) {
rv = mount(devname, mount_point, filesystem, flags | MS_RDONLY, 0);
if (rv < 0) {
printf("Failed to mount %s on %s: %s\n",
devname, mount_point, strerror(errno));
} else {
printf("Mount %s on %s read-only\n", devname, mount_point);
}
}
#if 1 //TODO: figure out why this is happening; remove include of stat.h
if (rv >= 0) {
/* For some reason, the x bits sometimes aren't set on the root
* of mounted volumes.
*/
struct stat st;
rv = stat(mount_point, &st);
if (rv < 0) {
return rv;
}
mode_t new_mode = st.st_mode | S_IXUSR | S_IXGRP | S_IXOTH;
if (new_mode != st.st_mode) {
printf("Fixing execute permissions for %s\n", mount_point);
rv = chmod(mount_point, new_mode);
if (rv < 0) {
printf("Couldn't fix permissions for %s: %s\n",
mount_point, strerror(errno));
}
}
}
#endif
return rv;
}
int
mtd_partition_info(const MtdPartition *partition,
size_t *total_size, size_t *erase_size, size_t *write_size)
{
char mtddevname[32];
sprintf(mtddevname, "/dev/mtd/mtd%d", partition->device_index);
int fd = open(mtddevname, O_RDONLY);
if (fd < 0) return -1;
struct mtd_info_user mtd_info;
int ret = ioctl(fd, MEMGETINFO, &mtd_info);
close(fd);
if (ret < 0) return -1;
if (total_size != NULL) *total_size = mtd_info.size;
if (erase_size != NULL) *erase_size = mtd_info.erasesize;
if (write_size != NULL) *write_size = mtd_info.writesize;
return 0;
}
MtdReadContext *mtd_read_partition(const MtdPartition *partition)
{
MtdReadContext *ctx = (MtdReadContext*) malloc(sizeof(MtdReadContext));
if (ctx == NULL) return NULL;
ctx->buffer = malloc(partition->erase_size);
if (ctx->buffer == NULL) {
free(ctx);
return NULL;
}
char mtddevname[32];
sprintf(mtddevname, "/dev/mtd/mtd%d", partition->device_index);
ctx->fd = open(mtddevname, O_RDONLY);
if (ctx->fd < 0) {
free(ctx);
free(ctx->buffer);
return NULL;
}
ctx->partition = partition;
ctx->read_size = partition->erase_size;
ctx->consumed = ctx->read_size;
return ctx;
}
static int read_block(const MtdReadContext *ctx, char *data)
{
struct mtd_ecc_stats before, after;
off_t pos;
ssize_t size;
if (ioctl(ctx->fd, ECCGETSTATS, &before)) {
fprintf(stderr, "mtd: ECCGETSTATS error (%s)\n", strerror(errno));
return -1;
}
pos = lseek(ctx->fd, 0, SEEK_CUR);
size = ctx->read_size;
while (pos + size <= (int) ctx->partition->size) {
if (lseek(ctx->fd, pos, SEEK_SET) != pos || read(ctx->fd, data, size) != size) {
fprintf(stderr, "mtd: read error at 0x%08lx (%s)\n",
pos, strerror(errno));
} else if (ioctl(ctx->fd, ECCGETSTATS, &after)) {
fprintf(stderr, "mtd: ECCGETSTATS error (%s)\n", strerror(errno));
return -1;
} else if (after.failed != before.failed) {
fprintf(stderr, "mtd: ECC errors (%d soft, %d hard) at 0x%08lx\n",
after.corrected - before.corrected,
after.failed - before.failed, pos);
/*
* Reset error counts, so next read may succeed.
*/
before = after;
} else {
return 0; // Success!
}
pos += ctx->read_size;
}
errno = ENOSPC;
return -1;
}
ssize_t mtd_read_data(MtdReadContext *ctx, char *data, size_t len)
{
ssize_t read = 0;
while (read < (int) len) {
if (ctx->consumed < ctx->read_size) {
size_t avail = ctx->read_size - ctx->consumed;
size_t copy = len - read < avail ? len - read : avail;
memcpy(data + read, ctx->buffer + ctx->consumed, copy);
ctx->consumed += copy;
read += copy;
}
// Read complete blocks directly into the user's buffer
while (ctx->consumed == ctx->read_size &&
len - read >= ctx->read_size) {
if (read_block(ctx, data + read)) return -1;
read += ctx->read_size;
}
// Read the next block into the buffer
if (ctx->consumed == ctx->read_size && read < (int) len) {
if (read_block(ctx, ctx->buffer)) return -1;
ctx->consumed = 0;
}
}
return read;
}
ssize_t mtd_read_raw(MtdReadContext *ctx, char *data, size_t len)
{
static const int SPARE_SIZE = (2048 >> 5);
struct mtd_info_user mtd_info;
struct mtd_oob_buf oob_buf;
struct nand_ecclayout ecc_layout;
struct nand_oobfree *fp;
unsigned char ecc[SPARE_SIZE];
char *src, *dst;
int i, n, ret;
/*
* FIXME: These two ioctls should be cached in MtdReadContext.
*/
ret = ioctl(ctx->fd, MEMGETINFO, &mtd_info);
if (ret < 0)
return -1;
ret = ioctl(ctx->fd, ECCGETLAYOUT, &ecc_layout);
if (ret < 0)
return -1;
ctx->read_size = mtd_info.writesize;
ctx->consumed = ctx->read_size;
/*
* Read next good data block.
*/
ret = read_block(ctx, data);
if (ret < 0)
return -1;
dst = src = data + ctx->read_size;
/*
* Read OOB data for last block read in read_block().
*/
oob_buf.start = lseek(ctx->fd, 0, SEEK_CUR) - ctx->read_size;
oob_buf.length = mtd_info.oobsize;
oob_buf.ptr = (unsigned char *) src;
ret = ioctl(ctx->fd, MEMREADOOB, &oob_buf);
if (ret < 0)
return -1;
/*
* As yaffs and yaffs2 use mode MEM_OOB_AUTO, but mtdchar uses
* MEM_OOB_PLACE, copy the spare data down the hard way.
*
* Safe away ECC data:
*/
for (i = 0; i < ecc_layout.eccbytes; i++) {
ecc[i] = src[ecc_layout.eccpos[i]];
}
for ( ; i < SPARE_SIZE; i++) {
ecc[i] = 0;
}
/*
* Copy yaffs2 spare data down.
*/
n = ecc_layout.oobavail;
fp = &ecc_layout.oobfree[0];
while (n) {
if (fp->offset) {
memmove(dst, src + fp->offset, fp->length);
}
dst += fp->length;
n -= fp->length;
++fp;
}
/*
* Restore ECC data behind spare data.
*/
memcpy(dst, ecc, (ctx->read_size >> 5) - ecc_layout.oobavail);
return ctx->read_size + (ctx->read_size >> 5);
}
void mtd_read_close(MtdReadContext *ctx)
{
close(ctx->fd);
free(ctx->buffer);
free(ctx);
}
MtdWriteContext *mtd_write_partition(const MtdPartition *partition)
{
MtdWriteContext *ctx = (MtdWriteContext*) malloc(sizeof(MtdWriteContext));
if (ctx == NULL) return NULL;
ctx->buffer = malloc(partition->erase_size);
if (ctx->buffer == NULL) {
free(ctx);
return NULL;
}
char mtddevname[32];
sprintf(mtddevname, "/dev/mtd/mtd%d", partition->device_index);
ctx->fd = open(mtddevname, O_RDWR);
if (ctx->fd < 0) {
free(ctx->buffer);
free(ctx);
return NULL;
}
ctx->partition = partition;
ctx->stored = 0;
return ctx;
}
static int write_block(const MtdPartition *partition, int fd, const char *data)
{
off_t pos = lseek(fd, 0, SEEK_CUR);
if (pos == (off_t) -1) return 1;
ssize_t size = partition->erase_size;
while (pos + size <= (int) partition->size) {
loff_t bpos = pos;
if (ioctl(fd, MEMGETBADBLOCK, &bpos) > 0) {
fprintf(stderr, "mtd: not writing bad block at 0x%08lx\n", pos);
pos += partition->erase_size;
continue; // Don't try to erase known factory-bad blocks.
}
struct erase_info_user erase_info;
erase_info.start = pos;
erase_info.length = size;
int retry;
for (retry = 0; retry < 2; ++retry) {
if (ioctl(fd, MEMERASE, &erase_info) < 0) {
fprintf(stderr, "mtd: erase failure at 0x%08lx (%s)\n",
pos, strerror(errno));
continue;
}
if (lseek(fd, pos, SEEK_SET) != pos ||
write(fd, data, size) != size) {
fprintf(stderr, "mtd: write error at 0x%08lx (%s)\n",
pos, strerror(errno));
}
char verify[size];
if (lseek(fd, pos, SEEK_SET) != pos ||
read(fd, verify, size) != size) {
fprintf(stderr, "mtd: re-read error at 0x%08lx (%s)\n",
pos, strerror(errno));
continue;
}
if (memcmp(data, verify, size) != 0) {
fprintf(stderr, "mtd: verification error at 0x%08lx (%s)\n",
pos, strerror(errno));
continue;
}
if (retry > 0) {
fprintf(stderr, "mtd: wrote block after %d retries\n", retry);
}
return 0; // Success!
}
// Try to erase it once more as we give up on this block
fprintf(stderr, "mtd: skipping write block at 0x%08lx\n", pos);
ioctl(fd, MEMERASE, &erase_info);
pos += partition->erase_size;
}
// Ran out of space on the device
errno = ENOSPC;
return -1;
}
ssize_t mtd_write_data(MtdWriteContext *ctx, const char *data, size_t len)
{
size_t wrote = 0;
while (wrote < len) {
// Coalesce partial writes into complete blocks
if (ctx->stored > 0 || len - wrote < ctx->partition->erase_size) {
size_t avail = ctx->partition->erase_size - ctx->stored;
size_t copy = len - wrote < avail ? len - wrote : avail;
memcpy(ctx->buffer + ctx->stored, data + wrote, copy);
ctx->stored += copy;
wrote += copy;
}
// If a complete block was accumulated, write it
if (ctx->stored == ctx->partition->erase_size) {
if (write_block(ctx->partition, ctx->fd, ctx->buffer)) return -1;
ctx->stored = 0;
}
// Write complete blocks directly from the user's buffer
while (ctx->stored == 0 && len - wrote >= ctx->partition->erase_size) {
if (write_block(ctx->partition, ctx->fd, data + wrote)) return -1;
wrote += ctx->partition->erase_size;
}
}
return wrote;
}
off_t mtd_erase_blocks(MtdWriteContext *ctx, int blocks)
{
// Zero-pad and write any pending data to get us to a block boundary
if (ctx->stored > 0) {
size_t zero = ctx->partition->erase_size - ctx->stored;
memset(ctx->buffer + ctx->stored, 0, zero);
if (write_block(ctx->partition, ctx->fd, ctx->buffer)) return -1;
ctx->stored = 0;
}
off_t pos = lseek(ctx->fd, 0, SEEK_CUR);
if ((off_t) pos == (off_t) -1) return pos;
const int total = (ctx->partition->size - pos) / ctx->partition->erase_size;
if (blocks < 0) blocks = total;
if (blocks > total) {
errno = ENOSPC;
return -1;
}
// Erase the specified number of blocks
while (blocks-- > 0) {
loff_t bpos = pos;
if (ioctl(ctx->fd, MEMGETBADBLOCK, &bpos) > 0) {
fprintf(stderr, "mtd: not erasing bad block at 0x%08lx\n", pos);
pos += ctx->partition->erase_size;
continue; // Don't try to erase known factory-bad blocks.
}
struct erase_info_user erase_info;
erase_info.start = pos;
erase_info.length = ctx->partition->erase_size;
if (ioctl(ctx->fd, MEMERASE, &erase_info) < 0) {
fprintf(stderr, "mtd: erase failure at 0x%08lx\n", pos);
}
pos += ctx->partition->erase_size;
}
return pos;
}
int mtd_write_close(MtdWriteContext *ctx)
{
int r = 0;
// Make sure any pending data gets written
if (mtd_erase_blocks(ctx, 0) == (off_t) -1) r = -1;
if (close(ctx->fd)) r = -1;
free(ctx->buffer);
free(ctx);
return r;
}

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dump_image/mtdutils.h Normal file
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/*
* Copyright (C) 2007 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.
*/
#ifndef MTDUTILS_H_
#define MTDUTILS_H_
#include <sys/types.h> // for size_t, etc.
typedef struct MtdPartition MtdPartition;
int mtd_scan_partitions(void);
const MtdPartition *mtd_find_partition_by_name(const char *name);
/* mount_point is like "/system"
* filesystem is like "yaffs2"
*/
int mtd_mount_partition(const MtdPartition *partition, const char *mount_point,
const char *filesystem, int read_only);
/* get the partition and the minimum erase/write block size. NULL is ok.
*/
int mtd_partition_info(const MtdPartition *partition,
size_t *total_size, size_t *erase_size, size_t *write_size);
/* read or write raw data from a partition, starting at the beginning.
* skips bad blocks as best we can.
*/
typedef struct MtdReadContext MtdReadContext;
typedef struct MtdWriteContext MtdWriteContext;
MtdReadContext *mtd_read_partition(const MtdPartition *);
ssize_t mtd_read_data(MtdReadContext *, char *data, size_t data_len);
ssize_t mtd_read_raw(MtdReadContext *, char *data, size_t data_len);
void mtd_read_close(MtdReadContext *);
MtdWriteContext *mtd_write_partition(const MtdPartition *);
ssize_t mtd_write_data(MtdWriteContext *, const char *data, size_t data_len);
off_t mtd_erase_blocks(MtdWriteContext *, int blocks); /* 0 ok, -1 for all */
int mtd_write_close(MtdWriteContext *);
#endif // MTDUTILS_H_

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#!/sbin/sh
# nandroid v2.1 - an Android backup tool for the G1 by infernix and brainaid
# Requirements:
# - a modded android in recovery mode (JF 1.3 will work by default)
# - adb shell as root in recovery mode if not using a pre-made recovery image
# - busybox in recovery mode
# - dump_image-arm-uclibc compiled and in path on phone
# - mkyaffs2image-arm-uclibc compiled and installed in path on phone
# Reference data:
# dev: size erasesize name
#mtd0: 00040000 00020000 "misc"
#mtd1: 00500000 00020000 "recovery"
#mtd2: 00280000 00020000 "boot"
#mtd3: 04380000 00020000 "system"
#mtd4: 04380000 00020000 "cache"
#mtd5: 04ac0000 00020000 "userdata"
#mtd6 is everything, dump splash1 with: dd if=/dev/mtd/mtd6ro of=/sdcard/splash1.img skip=19072 bs=2048 count=150
# We don't dump misc or cache because they do not contain any useful data that we are aware of at this time.
# Logical steps (v2.1):
#
# 0. test for a target dir and the various tools needed, if not found then exit with error.
# 1. check "adb devices" for a device in recovery mode. set DEVICEID variable to the device ID. abort when not found.
# 2. mount system and data partitions read-only, set up adb portforward and create destdir
# 3. check free space on /cache, exit if less blocks than 20MB free
# 4. push required tools to device in /cache
# 5 for partitions boot recovery misc:
# 5a get md5sum for content of current partition *on the device* (no data transfered)
# 5b while MD5sum comparison is incorrect (always is the first time):
# 5b1 dump current partition to a netcat session
# 5b2 start local netcat to dump image to current dir
# 5b3 compare md5sums of dumped data with dump in current dir. if correct, contine, else restart the loop (6b1)
# 6 for partitions system data:
# 6a get md5sum for tar of content of current partition *on the device* (no data transfered)
# 6b while MD5sum comparison is incorrect (always is the first time):
# 6b1 tar current partition to a netcat session
# 6b2 start local netcat to dump tar to current dir
# 6b3 compare md5sums of dumped data with dump in current dir. if correct, contine, else restart the loop (6b1)
# 6c if i'm running as root:
# 6c1 create a temp dir using either tempdir command or the deviceid in /tmp
# 6c2 extract tar to tempdir
# 6c3 invoke mkyaffs2image to create the img
# 6c4 clean up
# 7. remove tools from device /cache
# 8. umount system and data on device
# 9. print success.
DEVICEID=foo
RECOVERY=foo
echo "nandroid-mobile v2.1"
if [ "$1" == "" ]; then
echo "Usage: $0 {backup|restore} [/path/to/nandroid/backup/]"
echo "- backup will store a full system backup on /sdcard/nandroid/$DEVICEID"
echo "- restore path will restore the last made backup for boot, system, recovery and data"
exit 0
fi
case $1 in
backup)
mkyaffs2image=`which mkyaffs2image`
if [ "$mkyaffs2image" == "" ]; then
mkyaffs2image=`which mkyaffs2image-arm-uclibc`
if [ "$mkyaffs2image" == "" ]; then
echo "error: mkyaffs2image or mkyaffs2image-arm-uclibc not found in path"
exit 1
fi
fi
dump_image=`which dump_image`
if [ "$dump_image" == "" ]; then
dump_image=`which dump_image-arm-uclibc`
if [ "$dump_image" == "" ]; then
echo "error: dump_image or dump_image-arm-uclibc not found in path"
exit 1
fi
fi
break
;;
restore)
flash_image=`which flash_image`
if [ "$flash_image" == "" ]; then
flash_image=`which flash_image-arm-uclibc`
if [ "$flash_image" == "" ]; then
echo "error: flash_image or flash_image-arm-uclibc not found in path"
exit 1
fi
fi
break
;;
esac
# 1
DEVICEID=`cat /proc/cmdline | sed "s/.*serialno=//" | cut -d" " -f1`
RECOVERY=`cat /proc/cmdline | grep "androidboot.mode=recovery"`
if [ "$RECOVERY" == "foo" ]; then
echo "error: not running in recovery mode, aborting"
exit 1
fi
if [ "$DEVICEID" == "foo" ]; then
echo "error: device id not found in /proc/cmdline, aborting"
exit 1
fi
if [ ! "`id -u 2>/dev/null`" == "0" ]; then
if [ "`whoami 2>&1 | grep 'uid 0'`" == "" ]; then
echo "error: must run as root, aborting"
exit 1
fi
fi
case $1 in
restore)
ENERGY=`cat /sys/class/power_supply/battery/capacity`
if [ "`cat /sys/class/power_supply/battery/status`" == "Charging" ]; then
ENERGY=100
fi
if [ ! $ENERGY -ge 30 ]; then
echo "Error: not enough battery power"
echo "Connect charger or USB power and try again"
exit 1
fi
RESTOREPATH=$2
if [ ! -f $RESTOREPATH/nandroid.md5 ]; then
echo "error: $RESTOREPATH/nandroid.md5 not found, cannot verify backup data"
exit 1
fi
umount /system 2>/dev/null
umount /data 2>/dev/null
if [ ! "`mount | grep data`" == "" ]; then
echo "error: unable to umount /data, aborting"
exit 1
fi
if [ ! "`mount | grep system`" == "" ]; then
echo "error: unable to umount /system, aborting"
exit 1
fi
echo "Verifying backup images..."
CWD=$PWD
cd $RESTOREPATH
md5sum -c nandroid.md5
if [ $? -eq 1 ]; then
echo "error: md5sum mismatch, aborting"
exit 1
fi
for image in boot recovery; do
echo "Flashing $image..."
$flash_image $image $image.img
done
echo "Flashing system and data not currently supported"
echo "Restore done"
exit 0
;;
backup)
break
;;
*)
echo "Usage: $0 {backup|restore} [/path/to/nandroid/backup/]"
echo "- backup will store a full system backup on /sdcard/nandroid/$DEVICEID"
echo "- restore path will restore the last made backup for boot, system, recovery and data"
exit 1
;;
esac
# 2.
echo "mounting system and data read-only, sdcard read-write"
umount /system 2>/dev/null
umount /data 2>/dev/null
umount /sdcard 2>/dev/null
mount -o ro /system || FAIL=1
mount -o ro /data || FAIL=2
mount /sdcard || mount /dev/block/mmcblk0 /sdcard || FAIL=3
case $FAIL in
1) echo "Error mounting system read-only"; umount /system /data /sdcard; exit 1;;
2) echo "Error mounting data read-only"; umount /system /data /sdcard; exit 1;;
3) echo "Error mounting sdcard read-write"; umount /system /data /sdcard; exit 1;;
esac
TIMESTAMP="`date +%Y%m%d-%H%M`"
DESTDIR="/sdcard/nandroid/$DEVICEID/$TIMESTAMP"
if [ ! -d $DESTDIR ]; then
mkdir -p $DESTDIR
if [ ! -d $DESTDIR ]; then
echo "error: cannot create $DESTDIR"
umount /system 2>/dev/null
umount /data 2>/dev/null
umount /sdcard 2>/dev/null
exit 1
fi
else
touch $DESTDIR/.nandroidwritable
if [ ! -e $DESTDIR/.nandroidwritable ]; then
echo "error: cannot write to $DESTDIR"
umount /system 2>/dev/null
umount /data 2>/dev/null
umount /sdcard 2>/dev/null
exit 1
fi
rm $DESTDIR/.nandroidwritable
fi
# 3.
echo "checking free space on sdcard"
FREEBLOCKS="`df -k /sdcard| grep sdcard | awk '{ print $4 }'`"
# we need about 130MB for the dump
if [ $FREEBLOCKS -le 130000 ]; then
echo "error: not enough free space available on sdcard (need 130mb), aborting."
umount /system 2>/dev/null
umount /data 2>/dev/null
umount /sdcard 2>/dev/null
exit 1
fi
if [ -e /dev/mtd/mtd6ro ]; then
echo -n "Dumping splash1 from device over tcp to $DESTDIR/splash1.img..."
dd if=/dev/mtd/mtd6ro of=$DESTDIR/splash1.img skip=19072 bs=2048 count=150 2>/dev/null
echo "done"
sleep 1s
echo -n "Dumping splash2 from device over tcp to $DESTDIR/splash2.img..."
dd if=/dev/mtd/mtd6ro of=$DESTDIR/splash2.img skip=19456 bs=2048 count=150 2>/dev/null
echo "done"
fi
# 5.
for image in boot recovery misc; do
# 5a
DEVICEMD5=`$dump_image $image - | md5sum | awk '{ print $1 }'`
sleep 1s
MD5RESULT=1
# 5b
echo -n "Dumping $image to $DESTDIR/$image.img..."
ATTEMPT=0
while [ $MD5RESULT -eq 1 ]; do
let ATTEMPT=$ATTEMPT+1
# 5b1
$dump_image $image $DESTDIR/$image.img
sync
# 5b3
echo "${DEVICEMD5} $DESTDIR/$image.img" | md5sum -c -s -
if [ $? -eq 1 ]; then
true
else
MD5RESULT=0
fi
if [ "$ATTEMPT" == "5" ]; then
echo "fatal error while trying to dump $image, aborting"
umount /system
umount /data
umount /sdcard
exit 1
fi
done
echo "done"
done
# 6
for image in system data cache; do
# 6a
echo -n "Dumping $image to $DESTDIR/$image.img..."
$mkyaffs2image /$image $DESTDIR/$image.img
sync
echo "done"
done
# 7.
echo -n "generating md5sum file..."
CWD=$PWD
cd $DESTDIR
md5sum *img > nandroid.md5
cd $CWD
echo "done"
# 8.
echo "unmounting system, data and sdcard"
umount /system
umount /data
umount /sdcard
# 9.
echo "Backup successful."