/* * 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; }