make_ext4fs_main.c

   1 /*
   2  * Copyright (C) 2010 The Android Open Source Project
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <fcntl.h>
  18 #include <libgen.h>
  19 #include <stdio.h>
  20 #include <unistd.h>
  21
  22 #if defined(__linux__)
  23 #include <linux/fs.h>
  24 #elif defined(__APPLE__) && defined(__MACH__)
  25 #include <sys/disk.h>
  26 #endif
  27
  28 #ifdef ANDROID
  29 #include <private/android_filesystem_config.h>
  30 #endif
  31
  32 #include "make_ext4fs.h"
  33 #include "ext4_utils.h"
  34 #include "canned_fs_config.h"
  35
  36 extern struct fs_info info;
  37
  38
  39 static void usage(char *path)
  40 {
  41         fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path));
  42         fprintf(stderr, "    [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n");
  43         fprintf(stderr, "    [ -L <label> ] [ -f ] [ -a <android mountpoint> ]\n");
  44         fprintf(stderr, "    [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n");
  45         fprintf(stderr, "    [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n");
  46         fprintf(stderr, "    <filename> [<directory>]\n");
  47 }
  48
  49 int main(int argc, char **argv)
  50 {
  51         int opt;
  52         const char *filename = NULL;
  53         const char *directory = NULL;
  54         char *mountpoint = NULL;
  55         fs_config_func_t fs_config_func = NULL;
  56         const char *fs_config_file = NULL;
  57         int gzip = 0;
  58         int sparse = 0;
  59         int crc = 0;
  60         int wipe = 0;
  61         int fd;
  62         int exitcode;
  63         int verbose = 0;
  64         time_t fixed_time = -1;
  65         FILE* block_list_file = NULL;
  66
  67         while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:a:T:C:B:fwzJsctv")) != -1) {
  68                 switch (opt) {
  69                 case 'l':
  70                         info.len = parse_num(optarg);
  71                         break;
  72                 case 'j':
  73                         info.journal_blocks = parse_num(optarg);
  74                         break;
  75                 case 'b':
  76                         info.block_size = parse_num(optarg);
  77                         break;
  78                 case 'g':
  79                         info.blocks_per_group = parse_num(optarg);
  80                         break;
  81                 case 'i':
  82                         info.inodes = parse_num(optarg);
  83                         break;
  84                 case 'I':
  85                         info.inode_size = parse_num(optarg);
  86                         break;
  87                 case 'L':
  88                         info.label = optarg;
  89                         break;
  90                 case 'f':
  91                         force = 1;
  92                         break;
  93                 case 'a':
  94 #ifdef ANDROID
  95                         mountpoint = optarg;
  96 #else
  97                         fprintf(stderr, "can't set android permissions - built without android support\n");
  98                         usage(argv[0]);
  99                         exit(EXIT_FAILURE);
 100 #endif
 101                         break;
 102                 case 'w':
 103                         wipe = 1;
 104                         break;
 105                 case 'z':
 106                         gzip = 1;
 107                         break;
 108                 case 'J':
 109                         info.no_journal = 1;
 110                         break;
 111                 case 'c':
 112                         crc = 1;
 113                         break;
 114                 case 's':
 115                         sparse = 1;
 116                         break;
 117                 case 't':
 118                         fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
 119                         break;
 120                 case 'v':
 121                         verbose = 1;
 122                         break;
 123                 case 'T':
 124                         fixed_time = strtoll(optarg, NULL, 0);
 125                         break;
 126                 case 'C':
 127                         fs_config_file = optarg;
 128                         break;
 129                 case 'B':
 130                         block_list_file = fopen(optarg, "w");
 131                         if (block_list_file == NULL) {
 132                                 fprintf(stderr, "failed to open block_list_file: %s\n", strerror(errno));
 133                                 exit(EXIT_FAILURE);
 134                         }
 135                         break;
 136                 default: /* '?' */
 137                         usage(argv[0]);
 138                         exit(EXIT_FAILURE);
 139                 }
 140         }
 141
 142         if (fs_config_file) {
 143                 if (load_canned_fs_config(fs_config_file) < 0) {
 144                         fprintf(stderr, "failed to load %s\n", fs_config_file);
 145                         exit(EXIT_FAILURE);
 146                 }
 147                 fs_config_func = canned_fs_config;
 148         }
 149
 150         if (wipe && sparse) {
 151                 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
 152                 usage(argv[0]);
 153                 exit(EXIT_FAILURE);
 154         }
 155
 156         if (wipe && gzip) {
 157                 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
 158                 usage(argv[0]);
 159                 exit(EXIT_FAILURE);
 160         }
 161
 162         if (optind >= argc) {
 163                 fprintf(stderr, "Expected filename after options\n");
 164                 usage(argv[0]);
 165                 exit(EXIT_FAILURE);
 166         }
 167
 168         filename = argv[optind++];
 169
 170         if (optind < argc)
 171                 directory = argv[optind++];
 172
 173         if (optind < argc) {
 174                 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
 175                 usage(argv[0]);
 176                 exit(EXIT_FAILURE);
 177         }
 178
 179         if (strcmp(filename, "-")) {
 180                 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 181                 if (fd < 0) {
 182                         perror("open");
 183                         return EXIT_FAILURE;
 184                 }
 185         } else {
 186                 fd = STDOUT_FILENO;
 187         }
 188
 189         exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip,
 190                 sparse, crc, wipe, verbose, fixed_time, block_list_file);
 191         close(fd);
 192         if (block_list_file)
 193                 fclose(block_list_file);
 194         if (exitcode && strcmp(filename, "-"))
 195                 unlink(filename);
 196         return exitcode;
 197 }