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 #ifndef USE_MINGW /* O_BINARY is windows-specific flag */
  37 #define O_BINARY 0
  38 #endif
  39
  40 extern struct fs_info info;
  41
  42
  43 static void usage(char *path)
  44 {
  45         fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path));
  46         fprintf(stderr, "    [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n");
  47         fprintf(stderr, "    [ -L <label> ] [ -f ] [ -a <android mountpoint> ]\n");
  48         fprintf(stderr, "    [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n");
  49         fprintf(stderr, "    [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n");
  50         fprintf(stderr, "    <filename> [<directory>]\n");
  51 }
  52
  53 int main(int argc, char **argv)
  54 {
  55         int opt;
  56         const char *filename = NULL;
  57         const char *directory = NULL;
  58         char *mountpoint = NULL;
  59         fs_config_func_t fs_config_func = NULL;
  60         const char *fs_config_file = NULL;
  61         int gzip = 0;
  62         int sparse = 0;
  63         int crc = 0;
  64         int wipe = 0;
  65         int fd;
  66         int exitcode;
  67         int verbose = 0;
  68         time_t fixed_time = -1;
  69         FILE* block_list_file = NULL;
  70
  71         while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:a:T:C:B:fwzJsctv")) != -1) {
  72                 switch (opt) {
  73                 case 'l':
  74                         info.len = parse_num(optarg);
  75                         break;
  76                 case 'j':
  77                         info.journal_blocks = parse_num(optarg);
  78                         break;
  79                 case 'b':
  80                         info.block_size = parse_num(optarg);
  81                         break;
  82                 case 'g':
  83                         info.blocks_per_group = parse_num(optarg);
  84                         break;
  85                 case 'i':
  86                         info.inodes = parse_num(optarg);
  87                         break;
  88                 case 'I':
  89                         info.inode_size = parse_num(optarg);
  90                         break;
  91                 case 'L':
  92                         info.label = optarg;
  93                         break;
  94                 case 'f':
  95                         force = 1;
  96                         break;
  97                 case 'a':
  98 #ifdef ANDROID
  99                         mountpoint = optarg;
 100 #else
 101                         fprintf(stderr, "can't set android permissions - built without android support\n");
 102                         usage(argv[0]);
 103                         exit(EXIT_FAILURE);
 104 #endif
 105                         break;
 106                 case 'w':
 107                         wipe = 1;
 108                         break;
 109                 case 'z':
 110                         gzip = 1;
 111                         break;
 112                 case 'J':
 113                         info.no_journal = 1;
 114                         break;
 115                 case 'c':
 116                         crc = 1;
 117                         break;
 118                 case 's':
 119                         sparse = 1;
 120                         break;
 121                 case 't':
 122                         fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
 123                         break;
 124                 case 'v':
 125                         verbose = 1;
 126                         break;
 127                 case 'T':
 128                         fixed_time = strtoll(optarg, NULL, 0);
 129                         break;
 130                 case 'C':
 131                         fs_config_file = optarg;
 132                         break;
 133                 case 'B':
 134                         block_list_file = fopen(optarg, "w");
 135                         if (block_list_file == NULL) {
 136                                 fprintf(stderr, "failed to open block_list_file: %s\n", strerror(errno));
 137                                 exit(EXIT_FAILURE);
 138                         }
 139                         break;
 140                 default: /* '?' */
 141                         usage(argv[0]);
 142                         exit(EXIT_FAILURE);
 143                 }
 144         }
 145
 146         if (fs_config_file) {
 147                 if (load_canned_fs_config(fs_config_file) < 0) {
 148                         fprintf(stderr, "failed to load %s\n", fs_config_file);
 149                         exit(EXIT_FAILURE);
 150                 }
 151                 fs_config_func = canned_fs_config;
 152         }
 153
 154         if (wipe && sparse) {
 155                 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
 156                 usage(argv[0]);
 157                 exit(EXIT_FAILURE);
 158         }
 159
 160         if (wipe && gzip) {
 161                 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
 162                 usage(argv[0]);
 163                 exit(EXIT_FAILURE);
 164         }
 165
 166         if (optind >= argc) {
 167                 fprintf(stderr, "Expected filename after options\n");
 168                 usage(argv[0]);
 169                 exit(EXIT_FAILURE);
 170         }
 171
 172         filename = argv[optind++];
 173
 174         if (optind < argc)
 175                 directory = argv[optind++];
 176
 177         if (optind < argc) {
 178                 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
 179                 usage(argv[0]);
 180                 exit(EXIT_FAILURE);
 181         }
 182
 183         if (strcmp(filename, "-")) {
 184                 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
 185                 if (fd < 0) {
 186                         perror("open");
 187                         return EXIT_FAILURE;
 188                 }
 189         } else {
 190                 fd = STDOUT_FILENO;
 191         }
 192
 193         exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip,
 194                 sparse, crc, wipe, verbose, fixed_time, block_list_file);
 195         close(fd);
 196         if (block_list_file)
 197                 fclose(block_list_file);
 198         if (exitcode && strcmp(filename, "-"))
 199                 unlink(filename);
 200         return exitcode;
 201 }