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/*
* Copyright (c) Ezequiel Garcia, 2014
*
* 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 create/remove block devices on top of UBI volumes.
*/
#define PROGRAM_NAME "ubiblock"
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <getopt.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <libubi.h>
#include "common.h"
struct args {
const char *node;
int create;
};
static struct args args;
static const char doc[] = PROGRAM_NAME " version " VERSION
" - a tool to create/remove block device interface from UBI volumes.";
static const char optionsstr[] =
"-c, --create create block on top of a volume\n"
"-r, --remove remove block from volume\n"
"-h, --help print help message\n"
"-V, --version print program version";
static const char usage[] =
"Usage: " PROGRAM_NAME " [-c,-r] <UBI volume node file name>\n"
"Example: " PROGRAM_NAME " --create /dev/ubi0_0";
static const struct option long_options[] = {
{ .name = "create", .has_arg = 1, .flag = NULL, .val = 'c' },
{ .name = "remove", .has_arg = 1, .flag = NULL, .val = 'r' },
{ .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;
key = getopt_long(argc, argv, "c:r:h?V", long_options, NULL);
if (key == -1)
break;
switch (key) {
case 'c':
args.create = 1;
/* fall-through */
case 'r':
args.node = optarg;
break;
case 'h':
printf("%s\n\n", doc);
printf("%s\n\n", usage);
printf("%s\n", optionsstr);
exit(EXIT_SUCCESS);
case '?':
printf("%s\n\n", doc);
printf("%s\n\n", usage);
printf("%s\n", optionsstr);
return -1;
case 'V':
common_print_version();
exit(EXIT_SUCCESS);
default:
fprintf(stderr, "Use -h for help\n");
return -1;
}
}
if (!args.node)
return errmsg("invalid arguments (use -h for help)");
return 0;
}
int main(int argc, char * const argv[])
{
int err, fd;
libubi_t libubi;
err = parse_opt(argc, argv);
if (err)
return -1;
libubi = libubi_open();
if (!libubi) {
if (errno == 0)
errmsg("UBI is not present in the system");
return sys_errmsg("cannot open libubi");
}
err = ubi_probe_node(libubi, args.node);
if (err == 1) {
errmsg("\"%s\" is an UBI device node, not an UBI volume node",
args.node);
goto out_libubi;
} else if (err < 0) {
if (errno == ENODEV)
errmsg("\"%s\" is not an UBI volume node", args.node);
else
sys_errmsg("error while probing \"%s\"", args.node);
goto out_libubi;
}
fd = open(args.node, O_RDWR);
if (fd == -1) {
sys_errmsg("cannot open UBI volume \"%s\"", args.node);
goto out_libubi;
}
if (args.create) {
err = ubi_vol_block_create(fd);
if (err) {
if (errno == ENOSYS)
errmsg("UBI block is not present in the system");
if (errno == ENOTTY)
errmsg("UBI block not supported (check your kernel version)");
sys_errmsg("cannot create block device");
goto out_close;
}
} else {
err = ubi_vol_block_remove(fd);
if (err) {
if (errno == ENOSYS)
errmsg("UBI block is not present in the system");
if (errno == ENOTTY)
errmsg("UBI block not supported (check your kernel version)");
sys_errmsg("cannot remove block device");
goto out_close;
}
}
close(fd);
libubi_close(libubi);
return 0;
out_close:
close(fd);
out_libubi:
libubi_close(libubi);
return -1;
}
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