]> CyberLeo.Net >> Repos - FreeBSD/FreeBSD.git/blob - usr.sbin/efivar/efivar.c
Implement pci_enable_msi() and pci_disable_msi() in the LinuxKPI.
[FreeBSD/FreeBSD.git] / usr.sbin / efivar / efivar.c
1 /*-
2  * Copyright (c) 2016 Netflix, Inc.
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  *    notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  *    notice, this list of conditions and the following disclaimer in the
11  *    documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
23  * SUCH DAMAGE.
24  */
25
26 #include <sys/cdefs.h>
27 __FBSDID("$FreeBSD$");
28
29 #include <ctype.h>
30 #include <efivar.h>
31 #include <efivar-dp.h>
32 #include <err.h>
33 #include <errno.h>
34 #include <fcntl.h>
35 #include <getopt.h>
36 #include <stddef.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <unistd.h>
41 #include "efiutil.h"
42 #include "efichar.h"
43
44 /* options descriptor */
45 static struct option longopts[] = {
46         { "append",             no_argument,            NULL,   'a' },
47         { "ascii",              no_argument,            NULL,   'A' },
48         { "attributes",         required_argument,      NULL,   't' },
49         { "binary",             no_argument,            NULL,   'b' },
50         { "delete",             no_argument,            NULL,   'D' },
51         { "device",             no_argument,            NULL,   'd' },
52         { "device-path",        no_argument,            NULL,   'd' },
53         { "fromfile",           required_argument,      NULL,   'f' },
54         { "guid",               no_argument,            NULL,   'g' },
55         { "hex",                no_argument,            NULL,   'H' },
56         { "list-guids",         no_argument,            NULL,   'L' },
57         { "list",               no_argument,            NULL,   'l' },
58         { "load-option",        no_argument,            NULL,   'O' },
59         { "name",               required_argument,      NULL,   'n' },
60         { "no-name",            no_argument,            NULL,   'N' },
61         { "print",              no_argument,            NULL,   'p' },
62         { "print-decimal",      no_argument,            NULL,   'd' },
63         { "raw-guid",           no_argument,            NULL,   'R' },
64         { "utf8",               no_argument,            NULL,   'u' },
65         { "write",              no_argument,            NULL,   'w' },
66         { NULL,                 0,                      NULL,   0 }
67 };
68
69
70 static int aflag, Aflag, bflag, dflag, Dflag, gflag, Hflag, Nflag,
71         lflag, Lflag, Rflag, wflag, pflag, uflag, load_opt_flag;
72 static char *varname;
73 static char *fromfile;
74 static u_long attrib = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;
75
76 static void
77 usage(void)
78 {
79
80         errx(1, "efivar [-abdDHlLNpRtuw] [-n name] [-f file] [--append] [--ascii]\n"
81             "\t[--attributes] [--binary] [--delete] [--fromfile file] [--hex]\n"
82             "\t[--list-guids] [--list] [--load-option] [--name name] [--no-name]\n"
83             "\t[--print] [--print-decimal] [--raw-guid] [--utf8] [--write]\n"
84             "\tname[=value]");
85 }
86
87 static void
88 breakdown_name(char *name, efi_guid_t *guid, char **vname)
89 {
90         char *cp;
91
92         cp = strrchr(name, '-');
93         if (cp == NULL)
94                 errx(1, "Invalid name: %s", name);
95         *vname = cp + 1;
96         *cp = '\0';
97         if (efi_name_to_guid(name, guid) < 0)
98                 errx(1, "Invalid guid %s", name);
99 }
100
101 static uint8_t *
102 get_value(char *val, size_t *datalen)
103 {
104         static char buffer[16*1024];
105
106         if (val != NULL) {
107                 *datalen = strlen(val);
108                 return ((uint8_t *)val);
109         }
110         /* Read from stdin */
111         *datalen = sizeof(buffer);
112         *datalen = read(0, buffer, *datalen);
113         return ((uint8_t *)buffer);
114 }
115
116 static void
117 append_variable(char *name, char *val)
118 {
119         char *vname;
120         efi_guid_t guid;
121         size_t datalen;
122         uint8_t *data;
123
124         breakdown_name(name, &guid, &vname);
125         data = get_value(val, &datalen);
126         if (efi_append_variable(guid, vname, data, datalen, attrib) < 0)
127                 err(1, "efi_append_variable");
128 }
129
130 static void
131 delete_variable(char *name)
132 {
133         char *vname;
134         efi_guid_t guid;
135
136         breakdown_name(name, &guid, &vname);
137         if (efi_del_variable(guid, vname) < 0)
138                 err(1, "efi_del_variable");
139 }
140
141 static void
142 write_variable(char *name, char *val)
143 {
144         char *vname;
145         efi_guid_t guid;
146         size_t datalen;
147         uint8_t *data;
148
149         breakdown_name(name, &guid, &vname);
150         data = get_value(val, &datalen);
151         if (efi_set_variable(guid, vname, data, datalen, attrib) < 0)
152                 err(1, "efi_set_variable");
153 }
154
155 static void
156 devpath_dump(uint8_t *data, size_t datalen)
157 {
158         char buffer[1024];
159
160         efidp_format_device_path(buffer, sizeof(buffer),
161             (const_efidp)data, datalen);
162         if (!Nflag)
163                 printf(": ");
164         printf("%s\n", buffer);
165 }
166
167 static void
168 pretty_guid(efi_guid_t *guid, char **gname)
169 {
170         char *pretty = NULL;
171
172         if (gflag)
173                 efi_guid_to_name(guid, &pretty);
174
175         if (pretty == NULL)
176                 efi_guid_to_str(guid, gname);
177         else
178                 *gname = pretty;
179 }
180
181 static void
182 print_var(efi_guid_t *guid, char *name)
183 {
184         uint32_t att;
185         uint8_t *data;
186         size_t datalen;
187         char *gname = NULL;
188         int rv;
189
190         if (guid)
191                 pretty_guid(guid, &gname);
192         if (pflag || fromfile) {
193                 if (fromfile) {
194                         int fd;
195
196                         fd = open(fromfile, O_RDONLY);
197                         if (fd < 0)
198                                 err(1, "open %s", fromfile);
199                         data = malloc(64 * 1024);
200                         if (data == NULL)
201                                 err(1, "malloc");
202                         datalen = read(fd, data, 64 * 1024);
203                         if (datalen <= 0)
204                                 err(1, "read");
205                         close(fd);
206                 } else {
207                         rv = efi_get_variable(*guid, name, &data, &datalen, &att);
208                         if (rv < 0)
209                                 err(1, "fetching %s-%s", gname, name);
210                 }
211
212
213                 if (!Nflag)
214                         printf("%s-%s\n", gname, name);
215                 if (load_opt_flag)
216                         efi_print_load_option(data, datalen, Aflag, bflag, uflag);
217                 else if (Aflag)
218                         asciidump(data, datalen);
219                 else if (uflag)
220                         utf8dump(data, datalen);
221                 else if (bflag)
222                         bindump(data, datalen);
223                 else if (dflag)
224                         devpath_dump(data, datalen);
225                 else
226                         hexdump(data, datalen);
227         } else {
228                 printf("%s-%s", gname, name);
229         }
230         free(gname);
231         if (!Nflag)
232                 printf("\n");
233 }
234
235 static void
236 print_variable(char *name)
237 {
238         char *vname;
239         efi_guid_t guid;
240
241         breakdown_name(name, &guid, &vname);
242         print_var(&guid, vname);
243 }
244
245 static void
246 print_variables(void)
247 {
248         int rv;
249         char *name = NULL;
250         efi_guid_t *guid = NULL;
251
252         while ((rv = efi_get_next_variable_name(&guid, &name)) > 0)
253                 print_var(guid, name);
254
255         if (rv < 0)
256                 err(1, "Error listing names");
257 }
258
259 static void
260 print_known_guid(void)
261 {
262         struct uuid_table *tbl;
263         int i, n;
264
265         n = efi_known_guid(&tbl);
266         for (i = 0; i < n; i++)
267                 printf("%s %s\n", tbl[i].uuid_str, tbl[i].name);
268 }
269
270 static void
271 parse_args(int argc, char **argv)
272 {
273         int ch, i;
274
275         while ((ch = getopt_long(argc, argv, "aAbdDf:gHlLNn:OpRt:uw",
276                     longopts, NULL)) != -1) {
277                 switch (ch) {
278                 case 'a':
279                         aflag++;
280                         break;
281                 case 'A':
282                         Aflag++;
283                         break;
284                 case 'b':
285                         bflag++;
286                         break;
287                 case 'd':
288                         dflag++;
289                         break;
290                 case 'D':
291                         Dflag++;
292                         break;
293                 case 'g':
294                         gflag++;
295                         break;
296                 case 'H':
297                         Hflag++;
298                         break;
299                 case 'l':
300                         lflag++;
301                         break;
302                 case 'L':
303                         Lflag++;
304                         break;
305                 case 'n':
306                         varname = optarg;
307                         break;
308                 case 'N':
309                         Nflag++;
310                         break;
311                 case 'O':
312                         load_opt_flag++;
313                         break;
314                 case 'p':
315                         pflag++;
316                         break;
317                 case 'R':
318                         Rflag++;
319                         break;
320                 case 't':
321                         attrib = strtoul(optarg, NULL, 16);
322                         break;
323                 case 'u':
324                         uflag++;
325                         break;
326                 case 'w':
327                         wflag++;
328                         break;
329                 case 'f':
330                         free(fromfile);
331                         fromfile = strdup(optarg);
332                         break;
333                 case 0:
334                         errx(1, "unknown or unimplemented option\n");
335                         break;
336                 default:
337                         usage();
338                 }
339         }
340         argc -= optind;
341         argv += optind;
342
343         if (argc == 1)
344                 varname = argv[0];
345
346         if (aflag + Dflag + wflag > 1) {
347                 warnx("Can only use one of -a (--append), "
348                     "-D (--delete) and -w (--write)");
349                 usage();
350         }
351
352         if (aflag + Dflag + wflag > 0 && varname == NULL) {
353                 warnx("Must specify a variable for -a (--append), "
354                     "-D (--delete) or -w (--write)");
355                 usage();
356         }
357
358         if (aflag)
359                 append_variable(varname, NULL);
360         else if (Dflag)
361                 delete_variable(varname);
362         else if (wflag)
363                 write_variable(varname, NULL);
364         else if (Lflag)
365                 print_known_guid();
366         else if (fromfile) {
367                 Nflag = 1;
368                 print_var(NULL, NULL);
369         } else if (varname) {
370                 pflag++;
371                 print_variable(varname);
372         } else if (argc > 0) {
373                 pflag++;
374                 for (i = 0; i < argc; i++)
375                         print_variable(argv[i]);
376         } else
377                 print_variables();
378 }
379
380 int
381 main(int argc, char **argv)
382 {
383
384         parse_args(argc, argv);
385 }