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/*
* Copyright (C) 2007 Nokia Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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., 51
* Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/*
* An utility to delete UBI devices (detach MTD devices from UBI).
*
* Author: Artem Bityutskiy
*/
#define PROGRAM_NAME "ubidetach"
#include <stdio.h>
#include <stdint.h>
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <libubi.h>
#include "common.h"
#define DEFAULT_CTRL_DEV "/dev/ubi_ctrl"
/* The variables below are set by command line arguments */
struct args {
int devn;
int mtdn;
const char *node;
const char *dev;
};
static struct args args = {
.devn = UBI_DEV_NUM_AUTO,
.mtdn = -1,
.node = NULL,
.dev = NULL,
};
static const char doc[] = PROGRAM_NAME " version " VERSION
" - tool to remove UBI devices (detach MTD devices from UBI)";
static const char optionsstr[] =
"-d, --devn=<UBI device number> UBI device number to delete\n"
"-p, --dev-path=<path to device> or alternatively, MTD device node path to detach\n"
"-m, --mtdn=<MTD device number> or alternatively, MTD device number to detach\n"
"-h, --help print help message\n"
"-V, --version print program version";
static const char usage[] =
"Usage: " PROGRAM_NAME " [<UBI control device node file name>]\n"
"\t[-d <UBI device number>] [-m <MTD device number>] [-p <path to device>]\n"
"\t[--devn=<UBI device number>] [--mtdn=<MTD device number>]\n"
"\t[--dev-path=<path to device>]\n"
"UBI control device defaults to " DEFAULT_CTRL_DEV " if not supplied.\n"
"Example 1: " PROGRAM_NAME " -p /dev/mtd0 - detach MTD device /dev/mtd0\n"
"Example 2: " PROGRAM_NAME " -d 2 - delete UBI device 2 (ubi2)\n"
"Example 3: " PROGRAM_NAME " -m 0 - detach MTD device 0 (mtd0)";
static const struct option long_options[] = {
{ .name = "devn", .has_arg = 1, .flag = NULL, .val = 'd' },
{ .name = "dev-path", .has_arg = 1, .flag = NULL, .val = 'p' },
{ .name = "mtdn", .has_arg = 1, .flag = NULL, .val = 'm' },
{ .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[])
{
while (1) {
int key, error = 0;
key = getopt_long(argc, argv, "p:m:d:hV", long_options, NULL);
if (key == -1)
break;
switch (key) {
case 'p':
args.dev = optarg;
break;
case 'd':
args.devn = simple_strtoul(optarg, &error);
if (error || args.devn < 0)
return errmsg("bad UBI device number: \"%s\"", optarg);
break;
case 'm':
args.mtdn = simple_strtoul(optarg, &error);
if (error || args.mtdn < 0)
return errmsg("bad MTD device number: \"%s\"", optarg);
break;
case 'h':
printf("%s\n\n", doc);
printf("%s\n\n", usage);
printf("%s\n", optionsstr);
exit(EXIT_SUCCESS);
case 'V':
common_print_version();
exit(EXIT_SUCCESS);
case ':':
return errmsg("parameter is missing");
default:
fprintf(stderr, "Use -h for help\n");
return -1;
}
}
if (optind == argc)
args.node = DEFAULT_CTRL_DEV;
else if (optind != argc - 1)
return errmsg("more then one UBI control device specified (use -h for help)");
else
args.node = argv[optind];
if (args.mtdn == -1 && args.devn == -1 && args.dev == NULL)
return errmsg("neither MTD nor UBI devices were specified (use -h for help)");
if (args.devn != -1) {
if (args.mtdn != -1 || args.dev != NULL)
return errmsg("specify either MTD or UBI device (use -h for help)");
} else if (args.mtdn != -1 && args.dev != NULL)
return errmsg("specify either MTD number or device node (use -h for help)");
return 0;
}
int main(int argc, char * const argv[])
{
int err;
libubi_t libubi;
struct ubi_info ubi_info;
err = parse_opt(argc, argv);
if (err)
return -1;
libubi = libubi_open();
if (!libubi) {
if (errno == 0)
return errmsg("UBI is not present in the system");
return sys_errmsg("cannot open libubi");
}
/*
* Make sure the kernel is fresh enough and this feature is supported.
*/
err = ubi_get_info(libubi, &ubi_info);
if (err) {
sys_errmsg("cannot get UBI information");
goto out_libubi;
}
if (ubi_info.ctrl_major == -1) {
errmsg("MTD detach/detach feature is not supported by your kernel");
goto out_libubi;
}
if (args.devn != -1) {
err = ubi_remove_dev(libubi, args.node, args.devn);
if (err) {
sys_errmsg("cannot remove ubi%d", args.devn);
goto out_libubi;
}
} else {
if (args.dev != NULL) {
err = ubi_detach(libubi, args.node, args.dev);
if (err) {
sys_errmsg("cannot detach \"%s\"", args.dev);
goto out_libubi;
}
} else {
err = ubi_detach_mtd(libubi, args.node, args.mtdn);
if (err) {
sys_errmsg("cannot detach mtd%d", args.mtdn);
goto out_libubi;
}
}
}
libubi_close(libubi);
return 0;
out_libubi:
libubi_close(libubi);
return -1;
}
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