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
usage(char * path)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
main(int argc,char ** argv)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 (wipe && sparse) {
140 fprintf(stderr, "Cannot specifiy both wipe and sparse\n");
141 usage(argv[0]);
142 exit(EXIT_FAILURE);
143 }
144
145 if (wipe && gzip) {
146 fprintf(stderr, "Cannot specifiy both wipe and gzip\n");
147 usage(argv[0]);
148 exit(EXIT_FAILURE);
149 }
150
151 if (optind >= argc) {
152 fprintf(stderr, "Expected filename after options\n");
153 usage(argv[0]);
154 exit(EXIT_FAILURE);
155 }
156
157 filename = argv[optind++];
158
159 if (optind < argc)
160 directory = argv[optind++];
161
162 if (optind < argc) {
163 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
164 usage(argv[0]);
165 exit(EXIT_FAILURE);
166 }
167
168 if (strcmp(filename, "-")) {
169 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
170 if (fd < 0) {
171 error_errno("open");
172 return EXIT_FAILURE;
173 }
174 } else {
175 fd = STDOUT_FILENO;
176 }
177
178 exitcode = make_ext4fs_internal(fd, directory, mountpoint, fs_config_func, gzip,
179 sparse, crc, wipe, init_itabs, sehnd);
180 close(fd);
181
182 return exitcode;
183 }
184