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uuid.c revision 1.2 
      1 /*-
      2  * Copyright (c) 2004 Marcel Moolenaar
      3  * All rights reserved.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions
      7  * are met:
      8  *
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 #if HAVE_NBTOOL_CONFIG_H
     28 #include "nbtool_config.h"
     29 #endif
     30 
     31 #include <sys/cdefs.h>
     32 #ifdef __FBSDID
     33 __FBSDID("$FreeBSD: src/sbin/gpt/remove.c,v 1.10 2006/10/04 18:20:25 marcel Exp $");
     34 #endif
     35 #ifdef __RCSID
     36 __RCSID("$NetBSD: uuid.c,v 1.2 2024/08/19 17:15:38 christos Exp $");
     37 #endif
     38 
     39 #include <sys/types.h>
     40 
     41 #include <err.h>
     42 #include <stddef.h>
     43 #include <stdio.h>
     44 #include <stdlib.h>
     45 #include <string.h>
     46 #include <unistd.h>
     47 
     48 #include "map.h"
     49 #include "gpt.h"
     50 #include "gpt_private.h"
     51 
     52 static int cmd_uuid(gpt_t, int, char *[]);
     53 
     54 static const char *uuidhelp[] = {
     55 	"-a",
     56 	"[-b blocknr] [-i index] [-L label] [-s sectors] [-t type] [-U newuuid]",
     57 };
     58 
     59 struct gpt_cmd c_uuid = {
     60 	"uuid",
     61 	cmd_uuid,
     62 	uuidhelp, __arraycount(uuidhelp),
     63 	GPT_SYNC,
     64 };
     65 
     66 #define usage() gpt_usage(NULL, &c_uuid)
     67 
     68 static void
     69 change_ent(struct gpt_ent *ent, void *v, int backup)
     70 {
     71 	static gpt_uuid_t uuidstore;
     72 
     73 	if (v != NULL) {
     74 		memcpy(uuidstore, v, sizeof(uuidstore));
     75 	}
     76 	else if (!backup)
     77 		gpt_uuid_generate(NULL, uuidstore);
     78 	memmove(ent->ent_guid, uuidstore, sizeof(ent->ent_guid));
     79 }
     80 
     81 static void
     82 change_hdr(struct gpt_hdr *hdr, void *v, int backup)
     83 {
     84 	static gpt_uuid_t uuidstore;
     85 
     86 	if (!backup)
     87 		gpt_uuid_generate(NULL, uuidstore);
     88 	memmove(hdr->hdr_guid, uuidstore, sizeof(hdr->hdr_guid));
     89 }
     90 
     91 static int
     92 cmd_uuid(gpt_t gpt, int argc, char *argv[])
     93 {
     94 	int ch, rc;
     95 	struct gpt_find find;
     96 	gpt_uuid_t new_uuid;
     97 	void *v;
     98 
     99 	if (gpt == NULL)
    100 		return usage();
    101 
    102 	memset(&find, 0, sizeof(find));
    103 	find.msg = "UUID changed";
    104 
    105 	/* Get the uuid options */
    106 	v = NULL;
    107 	while ((ch = getopt(argc, argv, GPT_FIND "U:")) != -1) {
    108 		switch (ch) {
    109 		case 'U':
    110 			if (gpt_uuid_parse(optarg, new_uuid) == -1)
    111 				return usage();
    112 			v = new_uuid;
    113 			break;
    114 		default:
    115 			if (gpt_add_find(gpt, &find, ch) == -1)
    116 				return usage();
    117 			break;
    118 		}
    119 	}
    120 
    121 	if (argc != optind)
    122 		return usage();
    123 
    124 	rc = gpt_change_ent(gpt, &find, change_ent, v);
    125 	if (rc != 0)
    126 		return rc;
    127 
    128 	if (find.all)
    129 		return gpt_change_hdr(gpt, &find, change_hdr, NULL);
    130 
    131 	return 0;
    132 }
    133