2 * Copyright (c) 2016 Netflix, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
41 /* options descriptor */
42 static struct option longopts[] = {
43 { "append", no_argument, NULL, 'a' },
44 { "ascii", no_argument, NULL, 'A' },
45 { "attributes", required_argument, NULL, 't' },
46 { "binary", no_argument, NULL, 'b' },
47 { "delete", no_argument, NULL, 'D' },
48 { "fromfile", required_argument, NULL, 'f' },
49 { "hex", no_argument, NULL, 'H' },
50 { "list-guids", no_argument, NULL, 'L' },
51 { "list", no_argument, NULL, 'l' },
52 { "name", required_argument, NULL, 'n' },
53 { "no-name", no_argument, NULL, 'N' },
54 { "print", no_argument, NULL, 'p' },
55 { "print-decimal", no_argument, NULL, 'd' },
56 { "raw-guid", no_argument, NULL, 'R' },
57 { "write", no_argument, NULL, 'w' },
62 static int aflag, Aflag, bflag, dflag, Dflag, Hflag, Nflag,
63 lflag, Lflag, Rflag, wflag, pflag;
65 static u_long attrib = EFI_VARIABLE_NON_VOLATILE | EFI_VARIABLE_BOOTSERVICE_ACCESS | EFI_VARIABLE_RUNTIME_ACCESS;
71 errx(1, "efivar [-abdDHlLNpRtw] [-n name] [-f file] [--append] [--ascii]\n"
72 "\t[--attributes] [--binary] [--delete] [--fromfile file] [--hex]\n"
73 "\t[--list-guids] [--list] [--name name] [--no-name] [--print]\n"
74 "\t[--print-decimal] [--raw-guid] [--write] name[=value]");
78 breakdown_name(char *name, efi_guid_t *guid, char **vname)
82 cp = strrchr(name, '-');
84 errx(1, "Invalid name: %s", name);
87 if (efi_str_to_guid(name, guid) < 0)
88 errx(1, "Invalid guid %s", name);
92 get_value(char *val, size_t *datalen)
94 static char buffer[16*1024];
97 *datalen = strlen(val);
98 return ((uint8_t *)val);
100 /* Read from stdin */
101 *datalen = sizeof(buffer);
102 *datalen = read(0, buffer, *datalen);
103 return ((uint8_t *)buffer);
107 append_variable(char *name, char *val)
114 breakdown_name(name, &guid, &vname);
115 data = get_value(val, &datalen);
116 if (efi_append_variable(guid, vname, data, datalen, attrib) < 0)
117 err(1, "efi_append_variable");
121 delete_variable(char *name)
126 breakdown_name(name, &guid, &vname);
127 if (efi_del_variable(guid, vname) < 0)
128 err(1, "efi_del_variable");
132 write_variable(char *name, char *val)
139 breakdown_name(name, &guid, &vname);
140 data = get_value(val, &datalen);
141 if (efi_set_variable(guid, vname, data, datalen, attrib, 0) < 0)
142 err(1, "efi_set_variable");
146 asciidump(uint8_t *data, size_t datalen)
154 for (i = 0; i < datalen; i++) {
155 if (isprint(data[i])) {
161 printf("%c", data[i]);
168 printf("%%%02x", data[i]);
175 hexdump(uint8_t *data, size_t datalen)
181 for (i = 0; i < datalen; i++) {
185 printf("%04x: ", (int)i);
187 printf("%02x ", data[i]);
193 bindump(uint8_t *data, size_t datalen)
195 write(1, data, datalen);
199 print_var(efi_guid_t *guid, char *name)
207 efi_guid_to_str(guid, &gname);
209 printf("%s-%s", gname, name);
211 rv = efi_get_variable(*guid, name, &data, &datalen, &att);
214 printf("\n --- Error getting value --- %d", errno);
217 asciidump(data, datalen);
219 bindump(data, datalen);
221 hexdump(data, datalen);
230 print_variable(char *name)
235 breakdown_name(name, &guid, &vname);
236 print_var(&guid, vname);
240 print_variables(void)
244 efi_guid_t *guid = NULL;
246 while ((rv = efi_get_next_variable_name(&guid, &name)) > 0)
247 print_var(guid, name);
250 err(1, "Error listing names");
254 parse_args(int argc, char **argv)
258 while ((ch = getopt_long(argc, argv, "aAbdDf:HlLNn:pRt:w",
259 longopts, NULL)) != -1) {
298 attrib = strtoul(optarg, NULL, 16);
305 errx(1, "unknown or unimplemented option\n");
317 if (aflag + Dflag + wflag > 1) {
318 warnx("Can only use one of -a (--append), "
319 "-D (--delete) and -w (--write)");
323 if (aflag + Dflag + wflag > 0 && varname == NULL) {
324 warnx("Must specify a variable for -a (--append), "
325 "-D (--delete) or -w (--write)");
330 append_variable(varname, NULL);
332 delete_variable(varname);
334 write_variable(varname, NULL);
337 print_variable(varname);
338 } else if (argc > 0) {
340 for (i = 0; i < argc; i++)
341 print_variable(argv[i]);
347 main(int argc, char **argv)
350 parse_args(argc, argv);