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 "make_ext4fs.h"
  29 #include "ext4_utils.h"
  30 #include "canned_fs_config.h"
  31
  32 extern struct fs_info info;
  33
  34
  35 static void usage(char *path)
  36 {
  37         fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path));
  38         fprintf(stderr, "    [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n");
  39         fprintf(stderr, "    [ -L <label> ] [ -f ] [ -a <android mountpoint> ]\n");
  40         fprintf(stderr, "    [ -S file_contexts ] [ -C fs_config ] [ -T timestamp ]\n");
  41         fprintf(stderr, "    [ -z | -s ] [ -w ] [ -c ] [ -J ] [ -v ] [ -B <block_list_file> ]\n");
  42         fprintf(stderr, "    <filename> [<directory>]\n");
  43 }
  44
  45 int main(int argc, char **argv)
  46 {
  47         int opt;
  48         const char *filename = NULL;
  49         const char *directory = NULL;
  50         char *mountpoint = NULL;
  51         fs_config_func_t fs_config_func = NULL;
  52         const char *fs_config_file = NULL;
  53         int gzip = 0;
  54         int sparse = 0;
  55         int crc = 0;
  56         int wipe = 0;
  57         int fd;
  58         int exitcode;
  59         int verbose = 0;
  60         time_t fixed_time = -1;
  61         FILE* block_list_file = NULL;
  62
  63         while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:T:C:B:fwzJsctv")) != -1) {
  64                 switch (opt) {
  65                 case 'l':
  66                         info.len = parse_num(optarg);
  67                         break;
  68                 case 'j':
  69                         info.journal_blocks = parse_num(optarg);
  70                         break;
  71                 case 'b':
  72                         info.block_size = parse_num(optarg);
  73                         break;
  74                 case 'g':
  75                         info.blocks_per_group = parse_num(optarg);
  76                         break;
  77                 case 'i':
  78                         info.inodes = parse_num(optarg);
  79                         break;
  80                 case 'I':
  81                         info.inode_size = parse_num(optarg);
  82                         break;
  83                 case 'L':
  84                         info.label = optarg;
  85                         break;
  86                 case 'f':
  87                         force = 1;
  88                         break;
  89                 case 'w':
  90                         wipe = 1;
  91                         break;
  92                 case 'z':
  93                         gzip = 1;
  94                         break;
  95                 case 'J':
  96                         info.no_journal = 1;
  97                         break;
  98                 case 'c':
  99                         crc = 1;
 100                         break;
 101                 case 's':
 102                         sparse = 1;
 103                         break;
 104                 case 't':
 105                         fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
 106                         break;
 107                 case 'v':
 108                         verbose = 1;
 109                         break;
 110                 case 'T':
 111                         fixed_time = strtoll(optarg, NULL, 0);
 112                         break;
 113                 case 'C':
 114                         fs_config_file = optarg;
 115                         break;
 116                 case 'B':
 117                         block_list_file = fopen(optarg, "w");
 118                         if (block_list_file == NULL) {
 119                                 fprintf(stderr, "failed to open block_list_file: %s\n", strerror(errno));
 120                                 exit(EXIT_FAILURE);
 121                         }
 122                         break;
 123                 default: /* '?' */
 124                         usage(argv[0]);
 125                         exit(EXIT_FAILURE);
 126                 }
 127         }
 128
 129         if (fs_config_file) {
 130                 if (load_canned_fs_config(fs_config_file) < 0) {
 131                         fprintf(stderr, "failed to load %s\n", fs_config_file);
 132                         exit(EXIT_FAILURE);
 133                 }
 134                 fs_config_func = canned_fs_config;
 135         }
 136
 137         if (wipe && sparse) {
 138                 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
 139                 usage(argv[0]);
 140                 exit(EXIT_FAILURE);
 141         }
 142
 143         if (wipe && gzip) {
 144                 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
 145                 usage(argv[0]);
 146                 exit(EXIT_FAILURE);
 147         }
 148
 149         if (optind >= argc) {
 150                 fprintf(stderr, "Expected filename after options\n");
 151                 usage(argv[0]);
 152                 exit(EXIT_FAILURE);
 153         }
 154
 155         filename = argv[optind++];
 156
 157         if (optind < argc)
 158                 directory = argv[optind++];
 159
 160         if (optind < argc) {
 161                 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
 162                 usage(argv[0]);
 163                 exit(EXIT_FAILURE);
 164         }
 165
 166         if (strcmp(filename, "-")) {
 167                 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 168                 if (fd < 0) {
 169                         perror("open");
 170                         return EXIT_FAILURE;
 171                 }
 172         } else {
 173                 fd = STDOUT_FILENO;
 174         }
 175
 176         exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip,
 177                 sparse, crc, wipe, verbose, fixed_time, block_list_file);
 178         close(fd);
 179         if (block_list_file)
 180                 fclose(block_list_file);
 181         if (exitcode && strcmp(filename, "-"))
 182                 unlink(filename);
 183         return exitcode;
 184 }