PawletOS/android_bootable_recovery
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aed1bdfe59fddd8ee59ff6bbfbcdabf89df808ff
android_bootable_recovery/mmcutils/mmcutils.c
T
bigbiff ad58e1bfae repack: move sbin to /system ramdisk and update repacking 
for android-10

This will support updating the ramdisk to a different
compression format and co-exist with magisk.

We are also cleaning up and removing non android-10
api makefile actions.

We are also moving twrp repacking to its own class. We
check the new ramdisk format and if it's different
we have magisk compress using the new ramdisk format.

Change-Id: I770030aae7797e75817178b2f0fccd9f39dc23af
2020-09-08 10:08:33 -04:00

635 lines
17 KiB
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/*
* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
* * Neither the name of Code Aurora Forum, Inc. nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <string.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/reboot.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/mount.h> // for _IOW, _IOR, mount()
#include "mmcutils.h"
unsigned ext3_count = 0;
char *ext3_partitions[] = {"system", "userdata", "cache", "NONE"};
unsigned vfat_count = 0;
char *vfat_partitions[] = {"modem", "NONE"};
struct MmcPartition {
char *device_index;
char *filesystem;
char *name;
unsigned dstatus;
unsigned dtype ;
unsigned dfirstsec;
unsigned dsize;
};
typedef struct {
MmcPartition *partitions;
int partitions_allocd;
int partition_count;
} MmcState;
static MmcState g_mmc_state = {
NULL, // partitions
0, // partitions_allocd
-1 // partition_count
};
#define MMC_DEVICENAME "/dev/block/mmcblk0"
static void
mmc_partition_name (MmcPartition *mbr, unsigned int type) {
switch(type)
{
char name[64];
case MMC_BOOT_TYPE:
sprintf(name,"boot");
mbr->name = strdup(name);
break;
case MMC_RECOVERY_TYPE:
sprintf(name,"recovery");
mbr->name = strdup(name);
break;
case MMC_EXT3_TYPE:
if (strcmp("NONE", ext3_partitions[ext3_count])) {
strcpy((char *)name,(const char *)ext3_partitions[ext3_count]);
mbr->name = strdup(name);
ext3_count++;
}
mbr->filesystem = strdup("ext3");
break;
case MMC_VFAT_TYPE:
if (strcmp("NONE", vfat_partitions[vfat_count])) {
strcpy((char *)name,(const char *)vfat_partitions[vfat_count]);
mbr->name = strdup(name);
vfat_count++;
}
mbr->filesystem = strdup("vfat");
break;
};
}
static int
mmc_read_mbr (const char *device, MmcPartition *mbr) {
FILE *fd;
unsigned char buffer[512];
int idx, i;
unsigned mmc_partition_count = 0;
unsigned int dtype;
unsigned int dfirstsec;
unsigned int EBR_first_sec;
unsigned int EBR_current_sec;
int ret = -1;
fd = fopen(device, "r");
if(fd == NULL)
{
printf("Can't open device: \"%s\"\n", device);
goto ERROR2;
}
if ((fread(buffer, 512, 1, fd)) != 1)
{
printf("Can't read device: \"%s\"\n", device);
goto ERROR1;
}
/* Check to see if signature exists */
if ((buffer[TABLE_SIGNATURE] != 0x55) || \
(buffer[TABLE_SIGNATURE + 1] != 0xAA))
{
printf("Incorrect mbr signatures!\n");
goto ERROR1;
}
idx = TABLE_ENTRY_0;
for (i = 0; i < 4; i++)
{
char device_index[128];
mbr[mmc_partition_count].dstatus = \
buffer[idx + i * TABLE_ENTRY_SIZE + OFFSET_STATUS];
mbr[mmc_partition_count].dtype = \
buffer[idx + i * TABLE_ENTRY_SIZE + OFFSET_TYPE];
mbr[mmc_partition_count].dfirstsec = \
GET_LWORD_FROM_BYTE(&buffer[idx + \
i * TABLE_ENTRY_SIZE + \
OFFSET_FIRST_SEC]);
mbr[mmc_partition_count].dsize = \
GET_LWORD_FROM_BYTE(&buffer[idx + \
i * TABLE_ENTRY_SIZE + \
OFFSET_SIZE]);
dtype = mbr[mmc_partition_count].dtype;
dfirstsec = mbr[mmc_partition_count].dfirstsec;
mmc_partition_name(&mbr[mmc_partition_count], \
mbr[mmc_partition_count].dtype);
sprintf(device_index, "%sp%d", device, (mmc_partition_count+1));
mbr[mmc_partition_count].device_index = strdup(device_index);
mmc_partition_count++;
if (mmc_partition_count == MAX_PARTITIONS)
goto SUCCESS;
}
/* See if the last partition is EBR, if not, parsing is done */
if (dtype != 0x05)
{
goto SUCCESS;
}
EBR_first_sec = dfirstsec;
EBR_current_sec = dfirstsec;
fseek (fd, (EBR_first_sec * 512), SEEK_SET);
if ((fread(buffer, 512, 1, fd)) != 1)
goto ERROR1;
/* Loop to parse the EBR */
for (i = 0;; i++)
{
char device_index[128];
if ((buffer[TABLE_SIGNATURE] != 0x55) || (buffer[TABLE_SIGNATURE + 1] != 0xAA))
{
break;
}
mbr[mmc_partition_count].dstatus = \
buffer[TABLE_ENTRY_0 + OFFSET_STATUS];
mbr[mmc_partition_count].dtype = \
buffer[TABLE_ENTRY_0 + OFFSET_TYPE];
mbr[mmc_partition_count].dfirstsec = \
GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_0 + \
OFFSET_FIRST_SEC]) + \
EBR_current_sec;
mbr[mmc_partition_count].dsize = \
GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_0 + \
OFFSET_SIZE]);
mmc_partition_name(&mbr[mmc_partition_count], \
mbr[mmc_partition_count].dtype);
sprintf(device_index, "%sp%d", device, (mmc_partition_count+1));
mbr[mmc_partition_count].device_index = strdup(device_index);
mmc_partition_count++;
if (mmc_partition_count == MAX_PARTITIONS)
goto SUCCESS;
dfirstsec = GET_LWORD_FROM_BYTE(&buffer[TABLE_ENTRY_1 + OFFSET_FIRST_SEC]);
if(dfirstsec == 0)
{
/* Getting to the end of the EBR tables */
break;
}
/* More EBR to follow - read in the next EBR sector */
fseek (fd, ((EBR_first_sec + dfirstsec) * 512), SEEK_SET);
if ((fread(buffer, 512, 1, fd)) != 1)
goto ERROR1;
EBR_current_sec = EBR_first_sec + dfirstsec;
}
SUCCESS:
ret = mmc_partition_count;
ERROR1:
fclose(fd);
ERROR2:
return ret;
}
int
mmc_scan_partitions() {
int i;
if (g_mmc_state.partitions == NULL) {
const int nump = MAX_PARTITIONS;
MmcPartition *partitions = malloc(nump * sizeof(*partitions));
if (partitions == NULL) {
errno = ENOMEM;
return -1;
}
g_mmc_state.partitions = partitions;
g_mmc_state.partitions_allocd = nump;
memset(partitions, 0, nump * sizeof(*partitions));
}
g_mmc_state.partition_count = 0;
ext3_count = 0;
vfat_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_mmc_state.partitions_allocd; i++) {
MmcPartition *p = &g_mmc_state.partitions[i];
if (p->device_index != NULL) {
free(p->device_index);
p->device_index = NULL;
}
if (p->name != NULL) {
free(p->name);
p->name = NULL;
}
if (p->filesystem != NULL) {
free(p->filesystem);
p->filesystem = NULL;
}
}
g_mmc_state.partition_count = mmc_read_mbr(MMC_DEVICENAME, g_mmc_state.partitions);
if(g_mmc_state.partition_count == -1)
{
printf("Error in reading mbr!\n");
// keep "partitions" around so we can free the names on a rescan.
g_mmc_state.partition_count = -1;
}
return g_mmc_state.partition_count;
}
static const MmcPartition *
mmc_find_partition_by_device_index(const char *device_index)
{
if (g_mmc_state.partitions != NULL) {
int i;
for (i = 0; i < g_mmc_state.partitions_allocd; i++) {
MmcPartition *p = &g_mmc_state.partitions[i];
if (p->device_index !=NULL && p->name != NULL) {
if (strcmp(p->device_index, device_index) == 0) {
return p;
}
}
}
}
return NULL;
}
const MmcPartition *
mmc_find_partition_by_name(const char *name)
{
if (name[0] == '/') {
return mmc_find_partition_by_device_index(name);
}
if (g_mmc_state.partitions != NULL) {
int i;
for (i = 0; i < g_mmc_state.partitions_allocd; i++) {
MmcPartition *p = &g_mmc_state.partitions[i];
if (p->device_index !=NULL && p->name != NULL) {
if (strcmp(p->name, name) == 0) {
return p;
}
}
}
}
return NULL;
}
#define MKE2FS_BIN "/system/bin/mke2fs"
#define TUNE2FS_BIN "/system/bin/tune2fs"
#define E2FSCK_BIN "/system/bin/e2fsck"
int
run_exec_process ( char *const *argv) {
pid_t pid;
int status;
pid = fork();
if (pid == 0) {
execv(argv[0], argv);
fprintf(stderr, "E:Can't run (%s)\n",strerror(errno));
_exit(-1);
}
waitpid(pid, &status, 0);
if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
return 1;
}
return 0;
}
int
format_ext3_device (char *device) {
char *const mke2fs[] = {MKE2FS_BIN, "-j", "-q", device, NULL};
char *const tune2fs[] = {TUNE2FS_BIN, "-C", "1", device, NULL};
// Run mke2fs
if(run_exec_process(mke2fs)) {
printf("failure while running mke2fs\n");
return -1;
}
// Run tune2fs
if(run_exec_process(tune2fs)) {
printf("failure while running mke2fs\n");
return -1;
}
// Run e2fsck
char *const e2fsck[] = {E2FSCK_BIN, "-fy", device, NULL};
if(run_exec_process(e2fsck)) {
printf("failure while running e2fsck\n");
return -1;
}
return 0;
}
int
format_ext2_device (char *device) {
// Run mke2fs
char *const mke2fs[] = {MKE2FS_BIN, device, NULL};
if(run_exec_process(mke2fs))
return -1;
// Run tune2fs
char *const tune2fs[] = {TUNE2FS_BIN, "-C", "1", device, NULL};
if(run_exec_process(tune2fs))
return -1;
// Run e2fsck
char *const e2fsck[] = {E2FSCK_BIN, "-fy", device, NULL};
if(run_exec_process(e2fsck))
return -1;
return 0;
}
int
mmc_format_ext3 (const MmcPartition *partition) {
char device[128];
strcpy(device, partition->device_index);
return format_ext3_device(device);
}
int
mmc_mount_partition(const MmcPartition *partition, const char *mount_point,
int read_only)
{
const unsigned long flags = MS_NOATIME | MS_NODEV | MS_NODIRATIME;
char devname[128];
int rv = -1;
strcpy(devname, partition->device_index);
if (partition->filesystem == NULL) {
printf("Null filesystem!\n");
return rv;
}
if (!read_only) {
rv = mount(devname, mount_point, partition->filesystem, flags, NULL);
}
if (read_only || rv < 0) {
rv = mount(devname, mount_point, partition->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);
}
}
return rv;
}
int
mmc_raw_copy (const MmcPartition *partition, const char *in_file) {
int ch;
FILE *in;
FILE *out;
char buf[512];
unsigned sz = 0;
unsigned i;
int ret = -1;
char *out_file = partition->device_index;
in = fopen ( in_file, "r" );
if (in == NULL)
goto ERROR3;
out = fopen ( out_file, "w" );
if (out == NULL)
goto ERROR2;
fseek(in, 0L, SEEK_END);
sz = ftell(in);
fseek(in, 0L, SEEK_SET);
if (sz % 512)
{
while ( ( ch = fgetc ( in ) ) != EOF )
fputc ( ch, out );
}
else
{
for (i=0; i< (sz/512); i++)
{
if ((fread(buf, 512, 1, in)) != 1)
goto ERROR1;
if ((fwrite(buf, 512, 1, out)) != 1)
goto ERROR1;
}
}
fsync(fileno(out));
ret = 0;
ERROR1:
fclose ( out );
ERROR2:
fclose ( in );
ERROR3:
return ret;
}
int
mmc_raw_dump_internal (const char* in_file, const char *out_file) {
int ch;
FILE *in;
FILE *out;
char buf[512];
unsigned sz = 0;
unsigned i;
int ret = -1;
in = fopen ( in_file, "r" );
if (in == NULL)
goto ERROR3;
out = fopen ( out_file, "w" );
if (out == NULL)
goto ERROR2;
fseek(in, 0L, SEEK_END);
sz = ftell(in);
fseek(in, 0L, SEEK_SET);
if (sz % 512)
{
while ( ( ch = fgetc ( in ) ) != EOF )
fputc ( ch, out );
}
else
{
for (i=0; i< (sz/512); i++)
{
if ((fread(buf, 512, 1, in)) != 1)
goto ERROR1;
if ((fwrite(buf, 512, 1, out)) != 1)
goto ERROR1;
}
}
fsync(fileno(out));
ret = 0;
ERROR1:
fclose ( out );
ERROR2:
fclose ( in );
ERROR3:
return ret;
}
// TODO: refactor this to not be a giant copy paste mess
int
mmc_raw_dump (const MmcPartition *partition, const char *out_file) {
return mmc_raw_dump_internal(partition->device_index, out_file);
}
int
mmc_raw_read (const MmcPartition *partition, char *data, int data_size) {
FILE *in;
unsigned sz = 0;
int ret = -1;
char *in_file = partition->device_index;
in = fopen ( in_file, "r" );
if (in == NULL)
goto ERROR3;
fseek(in, 0L, SEEK_END);
sz = ftell(in);
fseek(in, 0L, SEEK_SET);
fread(data, data_size, 1, in);
ret = 0;
fclose ( in );
ERROR3:
return ret;
}
int
mmc_raw_write (const MmcPartition *partition, char *data, int data_size) {
FILE *out;
int ret = -1;
char *out_file = partition->device_index;
out = fopen ( out_file, "w" );
if (out == NULL)
goto ERROR3;
fwrite(data, data_size, 1, out);
ret = 0;
fclose ( out );
ERROR3:
return ret;
}
int cmd_mmc_restore_raw_partition(const char *partition, const char *filename)
{
if (partition[0] != '/') {
mmc_scan_partitions();
const MmcPartition *p;
p = mmc_find_partition_by_name(partition);
if (p == NULL)
return -1;
return mmc_raw_copy(p, filename);
}
else {
return mmc_raw_dump_internal(filename, partition);
}
}
int cmd_mmc_backup_raw_partition(const char *partition, const char *filename)
{
if (partition[0] != '/') {
mmc_scan_partitions();
const MmcPartition *p;
p = mmc_find_partition_by_name(partition);
if (p == NULL)
return -1;
return mmc_raw_dump(p, filename);
}
else {
return mmc_raw_dump_internal(partition, filename);
}
}
int cmd_mmc_erase_raw_partition(const char *partition __unused)
{
return 0;
}
int cmd_mmc_erase_partition(const char *partition, const char *filesystem __unused)
{
mmc_scan_partitions();
const MmcPartition *p;
p = mmc_find_partition_by_name(partition);
if (p == NULL)
return -1;
return mmc_format_ext3 (p);
}
int cmd_mmc_mount_partition(const char *partition, const char *mount_point, const char *filesystem __unused, int read_only)
{
mmc_scan_partitions();
const MmcPartition *p;
p = mmc_find_partition_by_name(partition);
if (p == NULL)
return -1;
return mmc_mount_partition(p, mount_point, read_only);
}
int cmd_mmc_get_partition_device(const char *partition, char *device)
{
mmc_scan_partitions();
const MmcPartition *p;
p = mmc_find_partition_by_name(partition);
if (p == NULL)
return -1;
strcpy(device, p->device_index);
return 0;
}
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