/*
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* Copyright (C) 2007 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/mount.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <ctype.h>
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#include "mtdutils/mtdutils.h"
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#include "mtdutils/mounts.h"
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#include "roots.h"
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#include "common.h"
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#include "rktools.h"
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#include "mtdutils/rk29.h"
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//#include "make_ext4fs.h"
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static int num_volumes = 0;
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static Volume* device_volumes = NULL;
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static char mount_point[256] = {0};
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char * get_link_path(const char* linkpath, char * buf, int count)
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{
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int i;
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int rslt;
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char path[256];
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memset(path, 0, sizeof(path));
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strcpy(path, linkpath);
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for (i = strlen(linkpath); i > 0; i--) {
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if (path[i] == '/') {
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path[i] = '\0';
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break;
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}
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}
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rslt = readlink(path, buf, count - 1);
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if (rslt < 0 || (rslt >= count - 1)) {
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// printf("No link to path [%s]!!! \n", path);
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return NULL;
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}
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if (buf[0] != '/') {
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char tmp[256];
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memset(tmp, 0, sizeof(tmp));
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memcpy(tmp, buf, strlen(buf));
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memset(buf, 0, sizeof(buf));
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memcpy(buf + 1, tmp,strlen(tmp));
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buf[0] = '/';
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}
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// printf("buf = %s \n", buf);
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return buf;
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}
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const char* get_mounted_device_from_path(const char* path)
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{
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const MountedVolume *volume;
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int result= scan_mounted_volumes();
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if (result < 0) {
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LOGE("failed to scan mounted volumes\n");
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return NULL;
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}
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volume = find_mounted_volume_by_mount_point(path);
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if (!volume) {
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LOGE("failed to get volume from %s\n", path);
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return NULL;
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}
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return volume->device;
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}
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void load_volume_table() {
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int alloc = 2;
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device_volumes = malloc(alloc * sizeof(Volume));
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// Insert an entry for /tmp, which is the ramdisk and is always mounted.
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device_volumes[0].mount_point = "/tmp";
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device_volumes[0].fs_type = "ramdisk";
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device_volumes[0].device = NULL;
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device_volumes[0].device2 = NULL;
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device_volumes[0].option = NULL;
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device_volumes[0].dump = NULL;
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device_volumes[0].pass = NULL;
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num_volumes = 1;
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FILE* fstab = fopen("/etc/fstab", "r");
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if (fstab == NULL) {
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LOGE("failed to open /etc/fstab (%d)\n", errno);
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return;
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}
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char buffer[1024];
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char file_system[1024];
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char mount_point[1024];
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char fs_type[1024];
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char option[1024];
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char dump[1024];
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char pass[1024];
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char device[1024];
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int i;
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while (fgets(buffer, sizeof(buffer)-1, fstab)) {
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i = sscanf(buffer, "%s %s %s %s %s %s", file_system,
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mount_point, fs_type, option, dump, pass);
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if (file_system[0] == '#') continue;
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//printf("load_volume_table file_system:%s, mount_point:%s, fs_type:%s, option:%s, dump:%s, pass:%s\n", file_system, mount_point, fs_type, option, dump, pass);
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/* HACK: Convert PARTLABEL to "by-name" symlink */
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if (file_system == strstr(file_system, "PARTLABEL="))
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snprintf(device, sizeof(device), "/dev/block/by-name/%s",
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file_system + strlen("PARTLABEL="));
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else
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strcpy(device, file_system);
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if (i == 6) {
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while (num_volumes >= alloc) {
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alloc *= 2;
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device_volumes = realloc(device_volumes, alloc*sizeof(Volume));
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}
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device_volumes[num_volumes].mount_point = strdup(mount_point);
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device_volumes[num_volumes].fs_type = strdup(fs_type);
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device_volumes[num_volumes].option = strdup(option);
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device_volumes[num_volumes].dump = strdup(dump);
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device_volumes[num_volumes].pass = strdup(pass);
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device_volumes[num_volumes].device = strdup(device);;
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device_volumes[num_volumes].device2 = NULL;
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++num_volumes;
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} else {
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LOGE("skipping malformed recovery.fstab line: %s\n", buffer);
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}
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}
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fclose(fstab);
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printf("recovery filesystem table\n");
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printf("=========================\n");
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for (i = 0; i < num_volumes; ++i) {
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Volume* v = &device_volumes[i];
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printf(" %d %s %s %s %s %s %s\n", i, v->device, v->mount_point, v->fs_type, v->option, v->dump, v->pass);
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}
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printf("\n");
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}
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Volume* volume_for_path(const char* path) {
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int i;
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memset(mount_point, 0, sizeof(mount_point));
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char* tmp = get_link_path(path, mount_point, 1024);
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// if ( tmp != NULL)
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// printf(" ### get mount_ponit = %s ### \n", mount_point);
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for (i = 0; i < num_volumes; ++i) {
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Volume* v = device_volumes+i;
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int len = strlen(v->mount_point);
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if (strncmp(path, v->mount_point, len) == 0 &&
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(path[len] == '\0' || path[len] == '/')) {
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//printf(" ===path = %s, v-mount_point = %s ===\n",path, v->mount_point);
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return v;
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} else {
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//add by chad.ma for symbol link file. eg. sdcard/ --->mnt/sdcard
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if (!tmp)
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continue;
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//printf(" # v->mount_point = %s\n", v->mount_point);
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if (strncmp(mount_point, v->mount_point, len) == 0 &&
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(path[len] == '\0' || path[len] == '/')) {
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return v;
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}
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}
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}
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return NULL;
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}
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int ensure_path_mounted(const char* path) {
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if (access(path, F_OK) == 0)
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return 0;
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Volume* v = volume_for_path(path);
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if (v == NULL) {
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if (mount_point[0] != 0) {
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int result= scan_mounted_volumes();
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if (result < 0) {
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LOGE("failed to scan mounted volumes\n");
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return -1;
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}
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const MountedVolume* mv =
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find_mounted_volume_by_mount_point(mount_point);
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if (mv) {
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// volume is already mounted
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LOGI("%s already mounted \n", path);
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return 0;
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}
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}
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LOGE("unknown volume for path [%s]\n", path);
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return -1;
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}
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if (strcmp(v->fs_type, "ramdisk") == 0) {
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// the ramdisk is always mounted.
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return 0;
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}
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int result;
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result = scan_mounted_volumes();
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if (result < 0) {
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LOGE("failed to scan mounted volumes\n");
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return -1;
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}
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const MountedVolume* mv =
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find_mounted_volume_by_mount_point(v->mount_point);
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if (mv) {
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// volume is already mounted
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return 0;
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}
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mkdir(v->mount_point, 0755); // in case it doesn't already exist
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if (strcmp(v->fs_type, "yaffs2") == 0) {
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// mount an MTD partition as a YAFFS2 filesystem.
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mtd_scan_partitions();
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const MtdPartition* partition;
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partition = mtd_find_partition_by_name(v->device);
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if (partition == NULL) {
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LOGE("failed to find \"%s\" partition to mount at \"%s\"\n",
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v->device, v->mount_point);
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return -1;
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}
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return mtd_mount_partition(partition, v->mount_point, v->fs_type, 0);
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} else if (strcmp(v->fs_type, "ext4") == 0 ||
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strcmp(v->fs_type, "vfat") == 0 ||
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strcmp(v->fs_type, "ext2") == 0) {
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char *blk_device;
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blk_device = (char*)v->device;
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if(strcmp("/mnt/sdcard", v->mount_point) == 0){
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blk_device = getenv(SD_POINT_NAME);
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if(blk_device == NULL){
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setFlashPoint();
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blk_device = getenv(SD_POINT_NAME);
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}
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result = mount(blk_device, v->mount_point, v->fs_type,
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MS_NOATIME | MS_NODEV | MS_NODIRATIME, "");
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if (result == 0) return 0;
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}
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result = mount(v->device, v->mount_point, v->fs_type,
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MS_NOATIME | MS_NODEV | MS_NODIRATIME, "");
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if (result == 0) return 0;
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if (v->device2) {
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LOGW("failed to mount %s (%s); trying %s\n",
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v->device, strerror(errno), v->device2);
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result = mount(v->device2, v->mount_point, v->fs_type,
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MS_NOATIME | MS_NODEV | MS_NODIRATIME, "");
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if (result == 0) return 0;
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}
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LOGE("failed to mount %s (%s)\n", v->mount_point, strerror(errno));
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return -1;
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}
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LOGE("unknown fs_type \"%s\" for %s\n", v->fs_type, v->mount_point);
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return -1;
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}
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int ensure_ex_path_unmounted(const char* path) {
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int result;
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result = scan_mounted_volumes();
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if (result < 0) {
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LOGE("unknown volume for path [%s]\n", path);
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return -1;
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}
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const MountedVolume* mv =
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find_mounted_volume_by_mount_point(path);
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if (mv == NULL) {
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LOGE("path: %s is already unmounted or not existed\n");
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return 0;
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}
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return unmount_mounted_volume(mv);
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}
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int ensure_path_unmounted(const char* path) {
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Volume* v = volume_for_path(path);
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if (v == NULL) {
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LOGE("unknown volume for path [%s]\n", path);
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return -1;
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}
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if (strcmp(v->fs_type, "ramdisk") == 0) {
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// the ramdisk is always mounted; you can't unmount it.
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return -1;
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}
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int result;
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result = scan_mounted_volumes();
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if (result < 0) {
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LOGE("failed to scan mounted volumes\n");
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return -1;
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}
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const MountedVolume* mv =
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find_mounted_volume_by_mount_point(v->mount_point);
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if (mv == NULL) {
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// volume is already unmounted
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return 0;
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}
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return unmount_mounted_volume(mv);
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}
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int format_volume(const char* volume) {
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Volume* v = volume_for_path(volume);
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if (v == NULL) {
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LOGE("unknown volume \"%s\"\n", volume);
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return -1;
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}
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if (strcmp(v->fs_type, "ramdisk") == 0) {
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// you can't format the ramdisk.
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LOGE("can't format_volume \"%s\"", volume);
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return -1;
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}
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if (strcmp(v->mount_point, volume) != 0) {
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LOGE("can't give path \"%s\" to format_volume\n", volume);
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return -1;
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}
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if (ensure_path_unmounted(volume) != 0) {
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LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
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return -1;
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}
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if (strcmp(v->fs_type, "yaffs2") == 0 || strcmp(v->fs_type, "mtd") == 0 || strcmp(v->fs_type, "ubifs") == 0 ) {
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mtd_scan_partitions();
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char filepath[20];
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if(strstr(v->device, "userdata") != NULL){
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strcpy(filepath, "userdata");
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LOGW("change v->device from %s to %s.\n", v->device, filepath);
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}else{
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strcpy(filepath, v->device);
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}
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const MtdPartition* partition = mtd_find_partition_by_name(filepath);
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if (partition == NULL) {
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LOGE("format_volume: no MTD partition \"%s\"\n", v->device);
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return -1;
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}
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MtdWriteContext *write = mtd_write_partition(partition);
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if (write == NULL) {
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LOGW("format_volume: can't open MTD \"%s\"\n", v->device);
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return -1;
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} else if (mtd_erase_blocks(write, -1) == (off_t) -1) {
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LOGW("format_volume: can't erase MTD \"%s\"\n", v->device);
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mtd_write_close(write);
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return -1;
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} else if (mtd_write_close(write)) {
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LOGW("format_volume: can't close MTD \"%s\"\n", v->device);
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return -1;
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}
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return 0;
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}
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if (strcmp(v->fs_type, "ext4") == 0) {
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//reset_ext4fs_info();
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int result = rk_make_ext4fs(v->device, 0, v->mount_point);//make_ext4fs(v->device, NULL, NULL, 0, 0, 0);
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if (result != 0) {
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LOGE("format_volume: make_extf4fs failed on %s\n", v->device);
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return -1;
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}
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return 0;
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}
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if (strcmp(v->fs_type, "ext2") == 0) {
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int result = rk_make_ext2fs(v->device);//make_ext2fs(v->device, NULL, NULL, 0, 0, 0);
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if (result != 0) {
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LOGE("format_volume: make_extf2fs failed on %s\n", v->device);
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return -1;
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}
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return 0;
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}
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if (strcmp(v->fs_type, "vfat") == 0) {
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int result = make_vfat(v->device, v->mount_point);
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if (result != 0) {
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LOGE("format_volume: make_vfat failed on %s\n", v->device);
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return -1;
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}
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return 0;
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}
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if (strcmp(v->fs_type, "ntfs") == 0) {
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int result = make_ntfs(v->device, v->mount_point);
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if (result != 0) {
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LOGE("format_volume: make_ntfs failed on %s\n", v->device);
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return -1;
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}
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return 0;
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}
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LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
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return -1;
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}
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int resize_volume(const char* volume) {
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Volume* v = volume_for_path(volume);
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if (v == NULL) {
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LOGE("unknown volume \"%s\"\n", volume);
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return -1;
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}
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if (strcmp(v->fs_type, "ramdisk") == 0) {
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// you can't format the ramdisk.
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LOGE("can't format_volume \"%s\"", volume);
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return -1;
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}
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if (strcmp(v->mount_point, volume) != 0) {
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LOGE("can't give path \"%s\" to format_volume\n", volume);
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return -1;
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}
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if (ensure_path_unmounted(volume) != 0) {
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LOGE("format_volume failed to unmount \"%s\"\n", v->mount_point);
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return -1;
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}
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if ((strcmp(v->fs_type, "ext4") == 0) || (strcmp(v->fs_type, "ext2") == 0)){
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int result = rk_check_and_resizefs(v->device);
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if (result != 0) {
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LOGE("resize_volume: resizefs failed on %s\n", v->device);
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return -1;
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}
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return 0;
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}
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LOGE("format_volume: fs_type \"%s\" unsupported\n", v->fs_type);
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return -1;
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}
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