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
36static void usage(char *path)
37{
38	fprintf(stderr, "%s -l <len>\n", basename(path));
39	fprintf(stderr, "    <filename>\n");
40}
41
42int 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