summaryrefslogtreecommitdiff
path: root/ubi-utils/src/ubirmvol.c
blob: e9a1b41eaad59a2787d240351205e08811cbbfc5 (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
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
/*
 * Copyright (c) International Business Machines Corp., 2006
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
 * the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

/*
 * An utility to remove UBI volumes.
 *
 * Authors: Artem B. Bityutskiy <dedekind@infradead.org>
 *          Frank Haverkamp <haver@vnet.ibm.com>
 */

#include <stdio.h>
#include <stdint.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>

#include <libubi.h>
#include "common.h"

#define PROGRAM_VERSION "1.5"
#define PROGRAM_NAME    "ubirmvol"

/* The variables below is set by command line arguments */
struct args {
	int vol_id;
	char node[MAX_NODE_LEN + 2];
};

static struct args myargs = {
	.vol_id = -1,
};

static const char *doc = "Version: " PROGRAM_VERSION "\n"
	PROGRAM_NAME " - a tool to remove UBI volumes.";

static const char *optionsstr =
"  -n, --vol_id=<volume id>   volume ID to remove\n"
"  -h, --help                 print help message\n"
"  -V, --version              print program version";

static const char *usage =
"Usage: " PROGRAM_NAME " <UBI device node file name> [-n <volume id>] [--vol_id=<volume id>] [-h] [--help]\n\n"
"Example: " PROGRAM_NAME "/dev/ubi0 -n 1 - remove UBI volume 1 from UBI device corresponding\n"
"         to the node file /dev/ubi0.";

static const struct option long_options[] = {
	{ .name = "vol_id",  .has_arg = 1, .flag = NULL, .val = 'n' },
	{ .name = "help",    .has_arg = 0, .flag = NULL, .val = 'h' },
	{ .name = "version", .has_arg = 0, .flag = NULL, .val = 'V' },
	{ NULL, 0, NULL, 0},
};

static int parse_opt(int argc, char * const argv[], struct args *args)
{
	char *endp;

	while (1) {
		int key;

		key = getopt_long(argc, argv, "n:hV", long_options, NULL);
		if (key == -1)
			break;

		switch (key) {

		case 'n':
			args->vol_id = strtoul(optarg, &endp, 0);
			if (*endp != '\0' || endp == optarg || args->vol_id < 0) {
				errmsg("bad volume ID: " "\"%s\"", optarg);
				return -1;
			}
			break;

		case 'h':
			fprintf(stderr, "%s\n\n", doc);
			fprintf(stderr, "%s\n\n", usage);
			fprintf(stderr, "%s\n", optionsstr);
			exit(0);

		case 'V':
			fprintf(stderr, "%s\n", PROGRAM_VERSION);
			exit(0);

		case ':':
			errmsg("parameter is missing");
			goto out;

		default:
			fprintf(stderr, "Use -h for help\n");
			exit(-1);
		}
	}

	return 0;
 out:
	return -1;
}

static int param_sanity_check(struct args *args)
{
	if (strlen(args->node) > MAX_NODE_LEN) {
		errmsg("too long device node name: \"%s\" (%d characters), max. is %d",
		       args->node, strlen(args->node), MAX_NODE_LEN);
		return -1;
	}

	if (args->vol_id == -1) {
		errmsg("volume ID is was not specified");
		return -1;
	}

	return 0;
}

int main(int argc, char * const argv[])
{
	int err;
	libubi_t libubi;

	strncpy(myargs.node, argv[1], MAX_NODE_LEN + 1);

	if (argc < 2) {
		errmsg("UBI device name was not specified (use -h for help)");
		return -1;
	}

	if (argc < 3) {
		errmsg("too few arguments (use -h for help)");
		return -1;
	}

	if (argv[1][0] == '-') {
		errmsg("UBI device was not specified (use -h for help)");
		return -1;
	}

	if (argv[2][0] != '-') {
		errmsg("incorrect arguments, use -h for help");
		return -1;
	}

	err = parse_opt(argc, argv, &myargs);
	if (err)
		return -1;

	libubi = libubi_open();
	if (libubi == NULL) {
		errmsg("cannot open libubi");
		perror("libubi_open");
		return -1;
	}

	err = param_sanity_check(&myargs);
	if (err)
		goto out_libubi;

	err = ubi_rmvol(libubi, myargs.node, myargs.vol_id);
	if (err) {
		errmsg("cannot UBI remove volume");
		perror("ubi_rmvol");
		goto out_libubi;
	}

	libubi_close(libubi);
	return 0;

out_libubi:
	libubi_close(libubi);
	return -1;
}