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Diffstat (limited to 'ubi-utils/src/ubidetach.c')
| -rw-r--r-- | ubi-utils/src/ubidetach.c | 200 |
1 files changed, 200 insertions, 0 deletions
diff --git a/ubi-utils/src/ubidetach.c b/ubi-utils/src/ubidetach.c new file mode 100644 index 0000000..cde21d0 --- /dev/null +++ b/ubi-utils/src/ubidetach.c @@ -0,0 +1,200 @@ +/* + * 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 + */ + +#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 "1.0" +#define PROGRAM_NAME "ubidetach" + +/* The variables below are set by command line arguments */ +struct args { + int devn; + int mtdn; + const char *node; +}; + +static struct args myargs = { + .devn = UBI_DEV_NUM_AUTO, + .mtdn = -1, + .node = NULL, +}; + +static const char *doc = PROGRAM_NAME " version " PROGRAM_VERSION +" - a 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" +"-m, --mtdn=<MTD device number> or altrnatively, MTD device number to detach -\n" +" this will delete corresponding UBI device\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> [-d <UBI device number>] [-m <MTD device number>]\n" +"\t\t[--devn <UBI device number>] [--mtdn=<MTD device number>]\n" +"Example 1: " PROGRAM_NAME " /dev/ubi_ctrl -d 2 - delete UBI device 2 (ubi2)\n" +"Example 2: " PROGRAM_NAME " /dev/ubi_ctrl -m 0 - detach MTD device 0 (mtd0)"; + +static const struct option long_options[] = { + { .name = "devn", .has_arg = 1, .flag = NULL, .val = 'd' }, + { .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; + char *endp; + + key = getopt_long(argc, argv, "m:d:hV", long_options, NULL); + if (key == -1) + break; + + switch (key) { + case 'd': + myargs.devn = strtoul(optarg, &endp, 0); + if (*endp != '\0' || endp == optarg || myargs.devn < 0) { + errmsg("bad UBI device number: \"%s\"", optarg); + return -1; + } + + break; + + case 'm': + myargs.mtdn = strtoul(optarg, &endp, 0); + if (*endp != '\0' || endp == optarg || myargs.mtdn < 0) { + errmsg("bad MTD device number: \"%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"); + return -1; + + default: + fprintf(stderr, "Use -h for help\n"); + exit(-1); + } + } + + if (optind == argc) { + errmsg("UBI control device name was not specified (use -h for help)"); + return -1; + } else if (optind != argc - 1) { + errmsg("more then one UBI control device specified (use -h for help)"); + return -1; + } + + if (myargs.mtdn == -1 && myargs.devn == -1) { + errmsg("neither MTD nor UBI devices were specified (use -h for help)"); + return -1; + } + + if (myargs.mtdn != -1 && myargs.devn != -1) { + errmsg("specify either MTD or UBI device (use -h for help)"); + return -1; + } + + myargs.node = argv[optind]; + 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 == NULL) { + errmsg("cannot open libubi"); + perror("libubi_open"); + return -1; + } + + /* + * Make sure the kernel is fresh enough and this feature is supported. + */ + err = ubi_get_info(libubi, &ubi_info); + if (err) { + errmsg("cannot get UBI information"); + perror("ubi_get_info"); + goto out_libubi; + } + + if (ubi_info.ctrl_major == -1) { + errmsg("MTD detach/detach feature is not supported by your kernel"); + goto out_libubi; + } + + if (myargs.devn != -1) { + err = ubi_remove_dev(libubi, myargs.node, myargs.devn); + if (err) { + errmsg("cannot remove ubi%d", myargs.devn); + perror("ubi_remove_dev"); + goto out_libubi; + } + } else { + err = ubi_detach_mtd(libubi, myargs.node, myargs.mtdn); + if (err) { + errmsg("cannot detach mtd%d", myargs.mtdn); + perror("ubi_detach_mtd"); + goto out_libubi; + } + } + + libubi_close(libubi); + return 0; + +out_libubi: + libubi_close(libubi); + return -1; +} + |