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uuid.c revision 1.3 
      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 1.3 2024/10/20 08:21:30 mlelstv 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 struct uuidctx {
     69 	gpt_t gpt;
     70 	gpt_uuid_t *uuid;
     71 };
     72 
     73 static void
     74 change_ent(struct gpt_ent *ent, void *v, int backup)
     75 {
     76 	struct uuidctx *ctx = v;
     77 	static gpt_uuid_t uuidstore;
     78 
     79 	if (!backup) {
     80 		if (ctx->uuid != NULL)
     81 			memcpy(uuidstore, ctx->uuid, sizeof(uuidstore));
     82 		else
     83 			gpt_uuid_generate(ctx->gpt, uuidstore);
     84 	}
     85 	memmove(ent->ent_guid, uuidstore, sizeof(ent->ent_guid));
     86 }
     87 
     88 static void
     89 change_hdr(struct gpt_hdr *hdr, void *v, int backup)
     90 {
     91 	struct uuidctx *ctx = v;
     92 	static gpt_uuid_t uuidstore;
     93 
     94 	if (!backup)
     95 		gpt_uuid_generate(ctx->gpt, uuidstore);
     96 	memmove(hdr->hdr_guid, uuidstore, sizeof(hdr->hdr_guid));
     97 }
     98 
     99 static int
    100 cmd_uuid(gpt_t gpt, int argc, char *argv[])
    101 {
    102 	int ch, rc;
    103 	struct gpt_find find;
    104 	gpt_uuid_t new_uuid;
    105 	struct uuidctx ctx;
    106 
    107 	if (gpt == NULL)
    108 		return usage();
    109 
    110 	memset(&find, 0, sizeof(find));
    111 	find.msg = "UUID changed";
    112 
    113 	/* Get the uuid options */
    114 	ctx.gpt = gpt;
    115 	ctx.uuid = NULL;
    116 	while ((ch = getopt(argc, argv, GPT_FIND "U:")) != -1) {
    117 		switch (ch) {
    118 		case 'U':
    119 			if (gpt_uuid_parse(optarg, new_uuid) == -1)
    120 				return usage();
    121 			ctx.uuid = &new_uuid;
    122 			break;
    123 		default:
    124 			if (gpt_add_find(gpt, &find, ch) == -1)
    125 				return usage();
    126 			break;
    127 		}
    128 	}
    129 
    130 	if (argc != optind)
    131 		return usage();
    132 
    133 	rc = gpt_change_ent(gpt, &find, change_ent, &ctx);
    134 	if (rc != 0)
    135 		return rc;
    136 
    137 	if (find.all)
    138 		return gpt_change_hdr(gpt, &find, change_hdr, &ctx);
    139 
    140 	return 0;
    141 }
    142