1 /*-
2 * Copyright (c) 2002 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/show.c,v 1.14 2006/06/22 22:22:32 marcel Exp $");
34 #endif
35 #ifdef __RCSID
36 __RCSID("$NetBSD: backup.c,v 1.20 2020/06/08 22:52:09 thorpej Exp $");
37 #endif
38
39 #include <sys/bootblock.h>
40 #include <sys/types.h>
41
42 #include <assert.h>
43 #include <err.h>
44 #include <limits.h>
45 #include <stddef.h>
46 #include <stdio.h>
47 #include <stdlib.h>
48 #include <string.h>
49 #include <unistd.h>
50 #include <prop/proplib.h>
51
52 #include "map.h"
53 #include "gpt.h"
54 #include "gpt_private.h"
55
56 static const char *backuphelp[] = {
57 "[-o outfile]",
58 };
59
60 static int cmd_backup(gpt_t, int, char *[]);
61
62 struct gpt_cmd c_backup = {
63 "backup",
64 cmd_backup,
65 backuphelp, __arraycount(backuphelp),
66 GPT_READONLY,
67 };
68
69 #define usage() gpt_usage(NULL, &c_backup)
70
71 #define PROP_ERR(x) if (!(x)) goto cleanup
72
73 static int
store_mbr(gpt_t gpt,unsigned int i,const struct mbr * mbr,prop_array_t * mbr_array)74 store_mbr(gpt_t gpt, unsigned int i, const struct mbr *mbr,
75 prop_array_t *mbr_array)
76 {
77 prop_dictionary_t mbr_dict;
78 const struct mbr_part *par = &mbr->mbr_part[i];
79
80 if (mbr->mbr_part[i].part_typ == MBR_PTYPE_UNUSED)
81 return 0;
82
83 mbr_dict = prop_dictionary_create();
84 PROP_ERR(mbr_dict);
85 assert(i <= INT_MAX);
86 PROP_ERR(prop_dictionary_set_int(mbr_dict, "index", (int)i));
87 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "flag", par->part_flag));
88 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "start_head",
89 par->part_shd));
90 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "start_sector",
91 par->part_ssect));
92 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "start_cylinder",
93 par->part_scyl));
94 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "type", par->part_typ));
95 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "end_head", par->part_ehd));
96 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "end_sector",
97 par->part_esect));
98 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "end_cylinder",
99 par->part_ecyl));
100 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "lba_start_low",
101 le16toh(par->part_start_lo)));
102 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "lba_start_high",
103 le16toh(par->part_start_hi)));
104 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "lba_size_low",
105 le16toh(par->part_size_lo)));
106 PROP_ERR(prop_dictionary_set_uint(mbr_dict, "lba_size_high",
107 le16toh(par->part_size_hi)));
108
109 if (*mbr_array == NULL) {
110 *mbr_array = prop_array_create();
111 PROP_ERR(*mbr_array);
112 }
113 PROP_ERR(prop_array_add_and_rel(*mbr_array, mbr_dict));
114 return 0;
115 cleanup:
116 if (mbr_dict)
117 prop_object_release(mbr_dict);
118 gpt_warnx(gpt, "proplib failure");
119 return -1;
120 }
121
122 static int
store_gpt(gpt_t gpt,const struct gpt_hdr * hdr,prop_dictionary_t * type_dict)123 store_gpt(gpt_t gpt, const struct gpt_hdr *hdr, prop_dictionary_t *type_dict)
124 {
125 char buf[128];
126
127 *type_dict = prop_dictionary_create();
128 PROP_ERR(type_dict);
129 PROP_ERR(prop_dictionary_set_uint(*type_dict, "revision",
130 le32toh(hdr->hdr_revision)));
131 gpt_uuid_snprintf(buf, sizeof(buf), "%d", hdr->hdr_guid);
132 PROP_ERR(prop_dictionary_set_string(*type_dict, "guid", buf));
133 assert(le32toh(hdr->hdr_entries) <= INT32_MAX);
134 PROP_ERR(prop_dictionary_set_int32(*type_dict, "entries",
135 (int32_t)le32toh(hdr->hdr_entries)));
136 return 0;
137 cleanup:
138 if (*type_dict)
139 prop_object_release(*type_dict);
140 return -1;
141 }
142
143 static int
store_tbl(gpt_t gpt,const map_t m,prop_dictionary_t * type_dict)144 store_tbl(gpt_t gpt, const map_t m, prop_dictionary_t *type_dict)
145 {
146 const struct gpt_ent *ent;
147 unsigned int i;
148 prop_dictionary_t gpt_dict;
149 prop_array_t gpt_array;
150 char buf[128];
151 uint8_t utfbuf[__arraycount(ent->ent_name) * 3 + 1];
152 bool rc;
153
154 *type_dict = NULL;
155
156 gpt_array = prop_array_create();
157 PROP_ERR(gpt_array);
158
159 *type_dict = prop_dictionary_create();
160 PROP_ERR(*type_dict);
161
162 ent = m->map_data;
163 for (i = 1, ent = m->map_data;
164 (const char *)ent < (const char *)(m->map_data) +
165 m->map_size * gpt->secsz; i++, ent++) {
166 gpt_dict = prop_dictionary_create();
167 PROP_ERR(gpt_dict);
168 assert(i <= INT_MAX);
169 PROP_ERR(prop_dictionary_set_int(gpt_dict, "index", (int)i));
170 gpt_uuid_snprintf(buf, sizeof(buf), "%d", ent->ent_type);
171 PROP_ERR(prop_dictionary_set_string(gpt_dict, "type", buf));
172 gpt_uuid_snprintf(buf, sizeof(buf), "%d", ent->ent_guid);
173 PROP_ERR(prop_dictionary_set_string(gpt_dict, "guid", buf));
174 PROP_ERR(prop_dictionary_set_uint64(gpt_dict, "start",
175 le64toh(ent->ent_lba_start)));
176 PROP_ERR(prop_dictionary_set_uint64(gpt_dict, "end",
177 le64toh(ent->ent_lba_end)));
178 PROP_ERR(prop_dictionary_set_uint64(gpt_dict, "attributes",
179 le64toh(ent->ent_attr)));
180 utf16_to_utf8(ent->ent_name, __arraycount(ent->ent_name),
181 utfbuf, __arraycount(utfbuf));
182 if (utfbuf[0] != '\0') {
183 PROP_ERR(prop_dictionary_set_string(gpt_dict, "name",
184 (char *)utfbuf));
185 }
186 rc = prop_array_add(gpt_array, gpt_dict);
187 PROP_ERR(rc);
188 }
189 rc = prop_dictionary_set_and_rel(*type_dict, "gpt_array", gpt_array);
190 PROP_ERR(rc);
191 return 0;
192 cleanup:
193 if (*type_dict)
194 prop_object_release(*type_dict);
195 if (gpt_array)
196 prop_object_release(gpt_array);
197 return -1;
198 }
199
200 static int
backup(gpt_t gpt,const char * outfile)201 backup(gpt_t gpt, const char *outfile)
202 {
203 map_t m;
204 struct mbr *mbr;
205 unsigned int i;
206 prop_dictionary_t props, type_dict;
207 prop_array_t mbr_array;
208 char *propext;
209 bool rc;
210 FILE *fp;
211
212 props = prop_dictionary_create();
213 PROP_ERR(props);
214 assert(gpt->secsz <= INT_MAX);
215 PROP_ERR(prop_dictionary_set_int(props, "sector_size",
216 (int)gpt->secsz));
217 m = map_first(gpt);
218 while (m != NULL) {
219 switch (m->map_type) {
220 case MAP_TYPE_MBR:
221 case MAP_TYPE_PMBR:
222 type_dict = prop_dictionary_create();
223 PROP_ERR(type_dict);
224 mbr = m->map_data;
225 PROP_ERR(prop_dictionary_set_data_nocopy(type_dict,
226 "code", mbr->mbr_code, sizeof(mbr->mbr_code)));
227 mbr_array = NULL;
228 for (i = 0; i < 4; i++) {
229 if (store_mbr(gpt, i, mbr, &mbr_array) == -1)
230 goto cleanup;
231 }
232 if (mbr_array != NULL) {
233 rc = prop_dictionary_set_and_rel(type_dict,
234 "mbr_array", mbr_array);
235 PROP_ERR(rc);
236 }
237 rc = prop_dictionary_set_and_rel(props, "MBR",
238 type_dict);
239 PROP_ERR(rc);
240 break;
241 case MAP_TYPE_PRI_GPT_HDR:
242 if (store_gpt(gpt, m->map_data, &type_dict) == -1)
243 goto cleanup;
244
245 rc = prop_dictionary_set_and_rel(props, "GPT_HDR",
246 type_dict);
247 PROP_ERR(rc);
248 break;
249 case MAP_TYPE_PRI_GPT_TBL:
250 if (store_tbl(gpt, m, &type_dict) == -1)
251 goto cleanup;
252 rc = prop_dictionary_set_and_rel(props, "GPT_TBL",
253 type_dict);
254 PROP_ERR(rc);
255 break;
256 }
257 m = m->map_next;
258 }
259 propext = prop_dictionary_externalize(props);
260 PROP_ERR(propext);
261 prop_object_release(props);
262 fp = strcmp(outfile, "-") == 0 ? stdout : fopen(outfile, "w");
263 if (fp == NULL) {
264 gpt_warn(gpt, "Can't open `%s'", outfile);
265 free(propext);
266 goto cleanup;
267 }
268 fputs(propext, fp);
269 if (fp != stdout)
270 fclose(fp);
271 free(propext);
272 return 0;
273 cleanup:
274 if (props)
275 prop_object_release(props);
276 return -1;
277 }
278
279 static int
cmd_backup(gpt_t gpt,int argc,char * argv[])280 cmd_backup(gpt_t gpt, int argc, char *argv[])
281 {
282 int ch;
283 const char *outfile = "-";
284
285 while ((ch = getopt(argc, argv, "o:")) != -1) {
286 switch(ch) {
287 case 'o':
288 outfile = optarg;
289 break;
290 default:
291 return usage();
292 }
293 }
294 if (argc != optind)
295 return usage();
296
297 return backup(gpt, outfile);
298 }
299