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 <unistd.h> 20 21 #if defined(__linux__) 22 #include <linux/fs.h> 23 #elif defined(__APPLE__) && defined(__MACH__) 24 #include <sys/disk.h> 25 #endif 26 27 #ifdef ANDROID 28 #include <private/android_filesystem_config.h> 29 #endif 30 31 #include "make_ext4fs.h" 32 33 #ifndef USE_MINGW /* O_BINARY is windows-specific flag */ 34 #define O_BINARY 0 35 #endif 36 37 extern struct fs_info info; 38 39 40 static void usage(char *path) 41 { 42 fprintf(stderr, "%s [ -l <len> ] [ -j <journal size> ] [ -b <block_size> ]\n", basename(path)); 43 fprintf(stderr, " [ -g <blocks per group> ] [ -i <inodes> ] [ -I <inode size> ]\n"); 44 fprintf(stderr, " [ -L <label> ] [ -f ] [ -a <android mountpoint> ]\n"); 45 fprintf(stderr, " [ -S file_contexts ]\n"); 46 fprintf(stderr, " [ -z | -s ] [ -t ] [ -w ] [ -c ] [ -J ]\n"); 47 fprintf(stderr, " <filename> [<directory>]\n"); 48 } 49 50 int main(int argc, char **argv) 51 { 52 int opt; 53 const char *filename = NULL; 54 const char *directory = NULL; 55 char *mountpoint = ""; 56 fs_config_func_t fs_config_func = NULL; 57 int gzip = 0; 58 int sparse = 0; 59 int crc = 0; 60 int wipe = 0; 61 int init_itabs = 0; 62 int fd; 63 int exitcode; 64 struct selabel_handle *sehnd = NULL; 65 #ifdef HAVE_SELINUX 66 struct selinux_opt seopts[] = { { SELABEL_OPT_PATH, "" } }; 67 #endif 68 69 while ((opt = getopt(argc, argv, "l:j:b:g:i:I:L:a:fwzJsctS:")) != -1) { 70 switch (opt) { 71 case 'l': 72 info.len = parse_num(optarg); 73 break; 74 case 'j': 75 info.journal_blocks = parse_num(optarg); 76 break; 77 case 'b': 78 info.block_size = parse_num(optarg); 79 break; 80 case 'g': 81 info.blocks_per_group = parse_num(optarg); 82 break; 83 case 'i': 84 info.inodes = parse_num(optarg); 85 break; 86 case 'I': 87 info.inode_size = parse_num(optarg); 88 break; 89 case 'L': 90 info.label = optarg; 91 break; 92 case 'f': 93 force = 1; 94 break; 95 case 'a': 96 #ifdef ANDROID 97 fs_config_func = fs_config; 98 mountpoint = optarg; 99 #else 100 fprintf(stderr, "can't set android permissions - built without android support\n"); 101 usage(argv[0]); 102 exit(EXIT_FAILURE); 103 #endif 104 break; 105 case 'w': 106 wipe = 1; 107 break; 108 case 'z': 109 gzip = 1; 110 break; 111 case 'J': 112 info.no_journal = 1; 113 break; 114 case 'c': 115 crc = 1; 116 break; 117 case 's': 118 sparse = 1; 119 break; 120 case 't': 121 init_itabs = 1; 122 break; 123 case 'S': 124 #ifdef HAVE_SELINUX 125 seopts[0].value = optarg; 126 sehnd = selabel_open(SELABEL_CTX_FILE, seopts, 1); 127 if (!sehnd) { 128 perror(optarg); 129 exit(EXIT_FAILURE); 130 } 131 #endif 132 break; 133 default: /* '?' */ 134 usage(argv[0]); 135 exit(EXIT_FAILURE); 136 } 137 } 138 139 if (gzip && sparse) { 140 fprintf(stderr, "Cannot specify both gzip and sparse\n"); 141 usage(argv[0]); 142 exit(EXIT_FAILURE); 143 } 144 145 if (wipe && sparse) { 146 fprintf(stderr, "Cannot specifiy both wipe and sparse\n"); 147 usage(argv[0]); 148 exit(EXIT_FAILURE); 149 } 150 151 if (wipe && gzip) { 152 fprintf(stderr, "Cannot specifiy both wipe and gzip\n"); 153 usage(argv[0]); 154 exit(EXIT_FAILURE); 155 } 156 157 if (optind >= argc) { 158 fprintf(stderr, "Expected filename after options\n"); 159 usage(argv[0]); 160 exit(EXIT_FAILURE); 161 } 162 163 filename = argv[optind++]; 164 165 if (optind < argc) 166 directory = argv[optind++]; 167 168 if (optind < argc) { 169 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]); 170 usage(argv[0]); 171 exit(EXIT_FAILURE); 172 } 173 174 if (strcmp(filename, "-")) { 175 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644); 176 if (fd < 0) { 177 error_errno("open"); 178 return EXIT_FAILURE; 179 } 180 } else { 181 fd = STDOUT_FILENO; 182 } 183 184 exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip, 185 sparse, crc, wipe, init_itabs, sehnd); 186 close(fd); 187 188 return exitcode; 189 } 190
