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 #include "ext4_utils.h"
  29 #include "canned_fs_config.h"
  30
  31 extern struct fs_info info;
  32
  33
  34 static void usage(char *path)
  35 {
  36         fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path));
  37         fprintf(stderr, "    [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n");
  38         fprintf(stderr, "    [ -L <label> ] [ -f ] [ -a <android mountpoint> ]\n");
  39         fprintf(stderr, "    [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n");
  40         fprintf(stderr, "    [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n");
  41         fprintf(stderr, "    <filename> [<directory>]\n");
  42 }
  43
  44 int main(int argc, char **argv)
  45 {
  46         int opt;
  47         const char *filename = NULL;
  48         const char *directory = NULL;
  49         char *mountpoint = NULL;
  50         fs_config_func_t fs_config_func = NULL;
  51         const char *fs_config_file = NULL;
  52         int gzip = 0;
  53         int sparse = 0;
  54         int crc = 0;
  55         int wipe = 0;
  56         int fd;
  57         int exitcode;
  58         int verbose = 0;
  59         time_t fixed_time = -1;
  60         FILE* block_list_file = NULL;
  61
  62         while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:T:C:B:fwzJsctv")) != -1) {
  63                 switch (opt) {
  64                 case 'l':
  65                         info.len = parse_num(optarg);
  66                         break;
  67                 case 'j':
  68                         info.journal_blocks = parse_num(optarg);
  69                         break;
  70                 case 'b':
  71                         info.block_size = parse_num(optarg);
  72                         break;
  73                 case 'g':
  74                         info.blocks_per_group = parse_num(optarg);
  75                         break;
  76                 case 'i':
  77                         info.inodes = parse_num(optarg);
  78                         break;
  79                 case 'I':
  80                         info.inode_size = parse_num(optarg);
  81                         break;
  82                 case 'L':
  83                         info.label = optarg;
  84                         break;
  85                 case 'f':
  86                         force = 1;
  87                         break;
  88                 case 'w':
  89                         wipe = 1;
  90                         break;
  91                 case 'z':
  92                         gzip = 1;
  93                         break;
  94                 case 'J':
  95                         info.no_journal = 1;
  96                         break;
  97                 case 'c':
  98                         crc = 1;
  99                         break;
 100                 case 's':
 101                         sparse = 1;
 102                         break;
 103                 case 't':
 104                         fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
 105                         break;
 106                 case 'v':
 107                         verbose = 1;
 108                         break;
 109                 case 'T':
 110                         fixed_time = strtoll(optarg, NULL, 0);
 111                         break;
 112                 case 'C':
 113                         fs_config_file = optarg;
 114                         break;
 115                 case 'B':
 116                         block_list_file = fopen(optarg, "w");
 117                         if (block_list_file == NULL) {
 118                                 fprintf(stderr, "failed to open block_list_file: %s\n", strerror(errno));
 119                                 exit(EXIT_FAILURE);
 120                         }
 121                         break;
 122                 default: /* '?' */
 123                         usage(argv[0]);
 124                         exit(EXIT_FAILURE);
 125                 }
 126         }
 127
 128         if (fs_config_file) {
 129                 if (load_canned_fs_config(fs_config_file) < 0) {
 130                         fprintf(stderr, "failed to load %s\n", fs_config_file);
 131                         exit(EXIT_FAILURE);
 132                 }
 133                 fs_config_func = canned_fs_config;
 134         }
 135
 136         if (wipe && sparse) {
 137                 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
 138                 usage(argv[0]);
 139                 exit(EXIT_FAILURE);
 140         }
 141
 142         if (wipe && gzip) {
 143                 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
 144                 usage(argv[0]);
 145                 exit(EXIT_FAILURE);
 146         }
 147
 148         if (optind >= argc) {
 149                 fprintf(stderr, "Expected filename after options\n");
 150                 usage(argv[0]);
 151                 exit(EXIT_FAILURE);
 152         }
 153
 154         filename = argv[optind++];
 155
 156         if (optind < argc)
 157                 directory = argv[optind++];
 158
 159         if (optind < argc) {
 160                 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
 161                 usage(argv[0]);
 162                 exit(EXIT_FAILURE);
 163         }
 164
 165         if (strcmp(filename, "-")) {
 166                 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 167                 if (fd < 0) {
 168                         perror("open");
 169                         return EXIT_FAILURE;
 170                 }
 171         } else {
 172                 fd = STDOUT_FILENO;
 173         }
 174
 175         exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip,
 176                 sparse, crc, wipe, verbose, fixed_time, block_list_file);
 177         close(fd);
 178         if (block_list_file)
 179                 fclose(block_list_file);
 180         if (exitcode && strcmp(filename, "-"))
 181                 unlink(filename);
 182         return exitcode;
 183 }