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, "    [ -m <reserved blocks percent> ] [ -L <label> ] [ -f ]\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         fs_config_func_t fs_config_func = NULL;
  50         const char *fs_config_file = NULL;
  51         int gzip = 0;
  52         int sparse = 0;
  53         int crc = 0;
  54         int wipe = 0;
  55         int fd;
  56         int exitcode;
  57         int verbose = 0;
  58         time_t fixed_time = -1;
  59         FILE* block_list_file = NULL;
  60
  61         while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:T:C:B:m:fwzJsctv")) != -1) {
  62                 switch (opt) {
  63                 case 'l':
  64                         info.len = parse_num(optarg);
  65                         break;
  66                 case 'j':
  67                         info.journal_blocks = parse_num(optarg);
  68                         break;
  69                 case 'b':
  70                         info.block_size = parse_num(optarg);
  71                         break;
  72                 case 'g':
  73                         info.blocks_per_group = parse_num(optarg);
  74                         break;
  75                 case 'i':
  76                         info.inodes = parse_num(optarg);
  77                         break;
  78                 case 'I':
  79                         info.inode_size = parse_num(optarg);
  80                         break;
  81                 case 'L':
  82                         info.label = optarg;
  83                         break;
  84                 case 'f':
  85                         force = 1;
  86                         break;
  87                 case 'w':
  88                         wipe = 1;
  89                         break;
  90                 case 'z':
  91                         gzip = 1;
  92                         break;
  93                 case 'J':
  94                         info.no_journal = 1;
  95                         break;
  96                 case 'c':
  97                         crc = 1;
  98                         break;
  99                 case 's':
 100                         sparse = 1;
 101                         break;
 102                 case 't':
 103                         fprintf(stderr, "Warning: -t (initialize inode tables) is deprecated\n");
 104                         break;
 105                 case 'v':
 106                         verbose = 1;
 107                         break;
 108                 case 'T':
 109                         fixed_time = strtoll(optarg, NULL, 0);
 110                         break;
 111                 case 'C':
 112                         fs_config_file = optarg;
 113                         break;
 114                 case 'B':
 115                         block_list_file = fopen(optarg, "w");
 116                         if (block_list_file == NULL) {
 117                                 fprintf(stderr, "failed to open block_list_file: %s\n", strerror(errno));
 118                                 exit(EXIT_FAILURE);
 119                         }
 120                         break;
 121                 case 'm':
 122                         info.reserve_pcnt = strtoul(optarg, NULL, 0);
 123                         break;
 124                 default: /* '?' */
 125                         usage(argv[0]);
 126                         exit(EXIT_FAILURE);
 127                 }
 128         }
 129
 130         if (fs_config_file) {
 131                 if (load_canned_fs_config(fs_config_file) < 0) {
 132                         fprintf(stderr, "failed to load %s\n", fs_config_file);
 133                         exit(EXIT_FAILURE);
 134                 }
 135                 fs_config_func = canned_fs_config;
 136         }
 137
 138         if (wipe && sparse) {
 139                 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
 140                 usage(argv[0]);
 141                 exit(EXIT_FAILURE);
 142         }
 143
 144         if (wipe && gzip) {
 145                 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
 146                 usage(argv[0]);
 147                 exit(EXIT_FAILURE);
 148         }
 149
 150         if (optind >= argc) {
 151                 fprintf(stderr, "Expected filename after options\n");
 152                 usage(argv[0]);
 153                 exit(EXIT_FAILURE);
 154         }
 155
 156         filename = argv[optind++];
 157
 158         if (optind < argc)
 159                 directory = argv[optind++];
 160
 161         if (optind < argc) {
 162                 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
 163                 usage(argv[0]);
 164                 exit(EXIT_FAILURE);
 165         }
 166
 167         if (strcmp(filename, "-")) {
 168                 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0644);
 169                 if (fd < 0) {
 170                         perror("open");
 171                         return EXIT_FAILURE;
 172                 }
 173         } else {
 174                 fd = STDOUT_FILENO;
 175         }
 176
 177         exitcode = make_ext4fs_internal(fd, directory, fs_config_func, gzip,
 178                 sparse, crc, wipe, verbose, fixed_time, block_list_file);
 179         close(fd);
 180         if (block_list_file)
 181                 fclose(block_list_file);
 182         if (exitcode && strcmp(filename, "-"))
 183                 unlink(filename);
 184         return exitcode;
 185 }