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 1.4 2025/02/23 20:47:19 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 const 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
change_ent(struct gpt_ent * ent,void * v,int backup)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
change_hdr(struct gpt_hdr * hdr,void * v,int backup)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
cmd_uuid(gpt_t gpt,int argc,char * argv[])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 case 'L':
124 case 'a':
125 case 'b':
126 case 'i':
127 case 's':
128 case 't':
129 if (gpt_add_find(gpt, &find, ch) == -1)
130 return usage();
131 break;
132 default:
133 return usage();
134 }
135 }
136
137 if (argc != optind)
138 return usage();
139
140 rc = gpt_change_ent(gpt, &find, change_ent, &ctx);
141 if (rc != 0)
142 return rc;
143
144 if (find.all)
145 return gpt_change_hdr(gpt, &find, change_hdr, &ctx);
146
147 return 0;
148 }
149