ext4_utils/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 #include <private/canned_fs_config.h>
  31 #endif
  32
  33 #ifndef USE_MINGW
  34 #include <selinux/selinux.h>
  35 #include <selinux/label.h>
  36 #if !defined(HOST)
  37 #include <selinux/android.h>
  38 #endif
  39 #else
  40 struct selabel_handle;
  41 #endif
  42
  43 #include "make_ext4fs.h"
  44 #include "ext4_utils.h"
  45
  46 #ifndef USE_MINGW /* O_BINARY is windows-specific flag */
  47 #define O_BINARY 0
  48 #endif
  49
  50 extern struct fs_info info;
  51
  52
  53 static void usage(char *path)
  54 {
  55         fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path));
  56         fprintf(stderr, "    [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n");
  57         fprintf(stderr, "    [ -L <label> ] [ -f ] [ -a <android mountpoint> ] [ -u ]\n");
  58         fprintf(stderr, "    [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n");
  59         fprintf(stderr, "    [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n");
  60         fprintf(stderr, "    [ -d <base_alloc_file_in> ] [ -D <base_alloc_file_out> ]\n");
  61         fprintf(stderr, "    <filename> [[<directory>] <target_out_directory>]\n");
  62 }
  63
  64 int main(int argc, char **argv)
  65 {
  66         int opt;
  67         const char *filename = NULL;
  68         const char *directory = NULL;
  69         const char *target_out_directory = NULL;
  70         char *mountpoint = NULL;
  71         fs_config_func_t fs_config_func = NULL;
  72         const char *fs_config_file = NULL;
  73         int gzip = 0;
  74         int sparse = 0;
  75         int crc = 0;
  76         int wipe = 0;
  77         int real_uuid = 0;
  78         int fd;
  79         int exitcode;
  80         int verbose = 0;
  81         time_t fixed_time = -1;
  82         struct selabel_handle *sehnd = NULL;
  83         FILE* block_list_file = NULL;
  84         FILE* base_alloc_file_in = NULL;
  85         FILE* base_alloc_file_out = NULL;
  86 #ifndef USE_MINGW
  87         struct selinux_opt seopts[] = { { SELABEL_OPT_PATH, "" } };
  88 #endif
  89
  90         while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:a:S:T:C:B:d:D:fwzJsctvu")) != -1) {
  91                 switch (opt) {
  92                 case 'l':
  93                         info.len = parse_num(optarg);
  94                         break;
  95                 case 'j':
  96                         info.journal_blocks = parse_num(optarg);
  97                         break;
  98                 case 'b':
  99                         info.block_size = parse_num(optarg);
 100                         break;
 101                 case 'g':
 102                         info.blocks_per_group = parse_num(optarg);
 103                         break;
 104                 case 'i':
 105                         info.inodes = parse_num(optarg);
 106                         break;
 107                 case 'I':
 108                         info.inode_size = parse_num(optarg);
 109                         break;
 110                 case 'L':
 111                         info.label = optarg;
 112                         break;
 113                 case 'f':
 114                         force = 1;
 115                         break;
 116                 case 'a':
 117 #ifdef ANDROID
 118                         mountpoint = optarg;
 119 #else
 120                         fprintf(stderr, "can't set android permissions - built without android support\n");
 121                         usage(argv[0]);
 122                         exit(EXIT_FAILURE);
 123 #endif
 124                         break;
 125                 case 'w':
 126                         wipe = 1;
 127                         break;
 128                 case 'u':
 129                         real_uuid = 1;
 130                         break;
 131                 case 'z':
 132                         gzip = 1;
 133                         break;
 134                 case 'J':
 135                         info.no_journal = 1;
 136                         break;
 137                 case 'c':
 138                         crc = 1;
 139                         break;
 140                 case 's':
 141                         sparse = 1;
 142                         break;
 143                 case 't':
 144                         fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
 145                         break;
 146                 case 'S':
 147 #ifndef USE_MINGW
 148                         seopts[0].value = optarg;
 149                         sehnd = selabel_open(SELABEL_CTX_FILE, seopts, 1);
 150                         if (!sehnd) {
 151                                 perror(optarg);
 152                                 exit(EXIT_FAILURE);
 153                         }
 154 #endif
 155                         break;
 156                 case 'v':
 157                         verbose = 1;
 158                         break;
 159                 case 'T':
 160                         fixed_time = strtoll(optarg, NULL, 0);
 161                         break;
 162                 case 'C':
 163                         fs_config_file = optarg;
 164                         break;
 165                 case 'B':
 166                         block_list_file = fopen(optarg, "w");
 167                         if (block_list_file == NULL) {
 168                                 fprintf(stderr, "failed to open block_list_file: %s\n", strerror(errno));
 169                                 exit(EXIT_FAILURE);
 170                         }
 171                         break;
 172                 case 'd':
 173                         base_alloc_file_in = fopen(optarg, "r");
 174                         if (base_alloc_file_in == NULL) {
 175                                 fprintf(stderr, "failed to open base_alloc_file_in: %s\n", strerror(errno));
 176                                 exit(EXIT_FAILURE);
 177                         }
 178                         break;
 179                 case 'D':
 180                         base_alloc_file_out = fopen(optarg, "w");
 181                         if (base_alloc_file_out == NULL) {
 182                                 fprintf(stderr, "failed to open base_alloc_file_out: %s\n", strerror(errno));
 183                                 exit(EXIT_FAILURE);
 184                         }
 185                         break;
 186                 default: /* '?' */
 187                         usage(argv[0]);
 188                         exit(EXIT_FAILURE);
 189                 }
 190         }
 191
 192 #if !defined(HOST)
 193         // Use only if -S option not requested
 194         if (!sehnd && mountpoint) {
 195                 sehnd = selinux_android_file_context_handle();
 196
 197                 if (!sehnd) {
 198                         perror(optarg);
 199                         exit(EXIT_FAILURE);
 200                 }
 201         }
 202 #endif
 203
 204         if (fs_config_file) {
 205                 if (load_canned_fs_config(fs_config_file) < 0) {
 206                         fprintf(stderr, "failed to load %s\n", fs_config_file);
 207                         exit(EXIT_FAILURE);
 208                 }
 209                 fs_config_func = canned_fs_config;
 210         } else if (mountpoint) {
 211                 fs_config_func = fs_config;
 212         }
 213
 214         if (wipe && sparse) {
 215                 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
 216                 usage(argv[0]);
 217                 exit(EXIT_FAILURE);
 218         }
 219
 220         if (wipe && gzip) {
 221                 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
 222                 usage(argv[0]);
 223                 exit(EXIT_FAILURE);
 224         }
 225
 226         if (optind >= argc) {
 227                 fprintf(stderr, "Expected filename after options\n");
 228                 usage(argv[0]);
 229                 exit(EXIT_FAILURE);
 230         }
 231
 232         filename = argv[optind++];
 233
 234         if (optind < argc)
 235                 directory = argv[optind++];
 236
 237         if (optind < argc)
 238                 target_out_directory = argv[optind++];
 239
 240         if (optind < argc) {
 241                 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
 242                 usage(argv[0]);
 243                 exit(EXIT_FAILURE);
 244         }
 245
 246         if (strcmp(filename, "-")) {
 247                 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
 248                 if (fd < 0) {
 249                         perror("open");
 250                         return EXIT_FAILURE;
 251                 }
 252         } else {
 253                 fd = STDOUT_FILENO;
 254         }
 255
 256         exitcode = make_ext4fs_internal(fd, directory, target_out_directory, mountpoint, fs_config_func, gzip,
 257                 sparse, crc, wipe, real_uuid, sehnd, verbose, fixed_time,
 258                 block_list_file, base_alloc_file_in, base_alloc_file_out);
 259         close(fd);
 260         if (block_list_file)
 261                 fclose(block_list_file);
 262         if (base_alloc_file_out)
 263                 fclose(base_alloc_file_out);
 264         if (base_alloc_file_in)
 265                 fclose(base_alloc_file_in);
 266         if (exitcode && strcmp(filename, "-"))
 267                 unlink(filename);
 268         return exitcode;
 269 }