aboutsummaryrefslogtreecommitdiff
path: root/mkfs/mkfs.c
blob: ae6210bd12d4942ebafccae21d3d29d1494007ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "mkfs.h"
#include "util.h"

static int padd_file(sqfs_info_t *info)
{
	size_t padd_sz = info->super.bytes_used % info->opt.devblksz;
	uint8_t *buffer;
	ssize_t ret;

	if (padd_sz == 0)
		return 0;

	padd_sz = info->opt.devblksz - padd_sz;

	buffer = calloc(1, padd_sz);
	if (buffer == NULL) {
		perror("padding output file to block size");
		return -1;
	}

	ret = write_retry(info->outfd, buffer, padd_sz);

	if (ret < 0) {
		perror("Error padding squashfs image to page size");
		free(buffer);
		return -1;
	}

	if ((size_t)ret < padd_sz) {
		fputs("Truncated write trying to padd squashfs image\n",
		      stderr);
		return -1;
	}

	free(buffer);
	return 0;
}

int main(int argc, char **argv)
{
	int status = EXIT_FAILURE, ret;
	sqfs_info_t info;

	memset(&info, 0, sizeof(info));

	process_command_line(&info.opt, argc, argv);

	if (sqfs_super_init(&info.super, info.opt.blksz, info.opt.def_mtime,
			    info.opt.compressor)) {
		return EXIT_FAILURE;
	}

	if (id_table_init(&info.idtbl))
		return EXIT_FAILURE;

	info.outfd = open(info.opt.outfile, info.opt.outmode, 0644);
	if (info.outfd < 0) {
		perror(info.opt.outfile);
		goto out_idtbl;
	}

	if (sqfs_super_write(&info.super, info.outfd))
		goto out_outfd;

	if (fstree_init(&info.fs, info.opt.blksz, info.opt.def_mtime,
			info.opt.def_mode, info.opt.def_uid,
			info.opt.def_gid)) {
		goto out_outfd;
	}

	if (fstree_from_file(&info.fs, info.opt.infile))
		goto out_fstree;

	fstree_sort(&info.fs);

	info.cmp = compressor_create(info.super.compression_id, true,
				     info.super.block_size);
	if (info.cmp == NULL) {
		fputs("Error creating compressor\n", stderr);
		goto out_outfd;
	}

	ret = info.cmp->write_options(info.cmp, info.outfd);
	if (ret < 0)
		goto out_cmp;

	if (ret > 0) {
		info.super.flags |= SQFS_FLAG_COMPRESSOR_OPTIONS;
		info.super.bytes_used += ret;
	}

	if (write_data_to_image(&info))
		goto out_cmp;

	if (sqfs_write_inodes(&info))
		goto out_cmp;

	info.super.fragment_entry_count = info.num_fragments;

	if (sqfs_write_table(info.outfd, &info.super, info.fragments,
			     sizeof(info.fragments[0]), info.num_fragments,
			     &info.super.fragment_table_start, info.cmp)) {
		goto out_cmp;
	}

	if (id_table_write(&info.idtbl, info.outfd, &info.super, info.cmp))
		goto out_cmp;

	if (sqfs_super_write(&info.super, info.outfd))
		goto out_cmp;

	if (padd_file(&info))
		goto out_cmp;

	status = EXIT_SUCCESS;
out_cmp:
	free(info.fragments);
	info.cmp->destroy(info.cmp);
out_fstree:
	fstree_cleanup(&info.fs);
out_outfd:
	close(info.outfd);
out_idtbl:
	id_table_cleanup(&info.idtbl);
	return status;
}