1 /*
2 * Copyright (C) 2014 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 <stdlib.h>
21 #include <string.h>
22 #include <unistd.h>
23
24 #if defined(__linux__)
25 #include <linux/fs.h>
26 #elif defined(__APPLE__) && defined(__MACH__)
27 #include <sys/disk.h>
28 #endif
29
30 #include "make_f2fs.h"
31
32 #ifndef USE_MINGW /* O_BINARY is windows-specific flag */
33 #define O_BINARY 0
34 #endif
35
usage(char * path)36 static void usage(char *path)
37 {
38 fprintf(stderr, "%s -l <len>\n", basename(path));
39 fprintf(stderr, " <filename>\n");
40 }
41
main(int argc,char ** argv)42 int main(int argc, char **argv)
43 {
44 int opt;
45 const char *filename = NULL;
46 int fd;
47 int exitcode;
48 long long len;
49 while ((opt = getopt(argc, argv, "l:")) != -1) {
50 switch (opt) {
51 case 'l':
52 len = atoll(optarg);
53 break;
54 default: /* '?' */
55 usage(argv[0]);
56 exit(EXIT_FAILURE);
57 }
58 }
59
60
61 if (optind >= argc) {
62 fprintf(stderr, "Expected filename after options\n");
63 usage(argv[0]);
64 exit(EXIT_FAILURE);
65 }
66
67 filename = argv[optind++];
68
69 if (optind < argc) {
70 fprintf(stderr, "Unexpected argument: %s\n", argv[optind]);
71 usage(argv[0]);
72 exit(EXIT_FAILURE);
73 }
74
75 if (strcmp(filename, "-")) {
76 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0644);
77 if (fd < 0) {
78 perror("open");
79 return EXIT_FAILURE;
80 }
81 } else {
82 fd = STDOUT_FILENO;
83 }
84
85 exitcode = make_f2fs_sparse_fd(fd, len, NULL, NULL);
86
87 close(fd);
88 if (exitcode && strcmp(filename, "-"))
89 unlink(filename);
90 return exitcode;
91 }
92