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Commit | Line | Data |
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8855c38d KZ |
1 | /* |
2 | * Copyright (C) 2003-2007 Red Hat, Inc. | |
3 | * | |
601d12fb | 4 | * This file is part of util-linux. |
8855c38d KZ |
5 | * |
6 | * This file is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This file is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
8b3a46d2 KZ |
16 | * |
17 | * Written by Elliot Lee <sopwith@redhat.com> | |
18 | * New personality options & code added by Jindrich Novy <jnovy@redhat.com> | |
19 | * ADD_NO_RANDOMIZE flag added by Arjan van de Ven <arjanv@redhat.com> | |
20 | * Help and MIPS support from Mike Frysinger (vapier@gentoo.org) | |
21 | * Better error handling from Dmitry V. Levin (ldv@altlinux.org) | |
22 | * | |
23 | * based on ideas from the ppc32 util by Guy Streeter (2002-01), based on the | |
24 | * sparc32 util by Jakub Jelinek (1998, 1999) | |
25 | */ | |
26 | ||
9ed11cc2 | 27 | #include <sys/personality.h> |
8b3a46d2 KZ |
28 | #include <unistd.h> |
29 | #include <stdio.h> | |
30 | #include <string.h> | |
31 | #include <stdlib.h> | |
8df90dec KZ |
32 | #include <getopt.h> |
33 | #include <limits.h> | |
8b3a46d2 | 34 | #include <sys/utsname.h> |
a5b47e0a | 35 | #include "nls.h" |
c60103a9 | 36 | #include "c.h" |
efb8854f | 37 | #include "closestream.h" |
035fc2d9 | 38 | #include "sysfs.h" |
8b3a46d2 | 39 | |
9ed11cc2 SK |
40 | #ifndef HAVE_PERSONALITY |
41 | # include <syscall.h> | |
42 | # define personality(pers) ((long)syscall(SYS_personality, pers)) | |
43 | #endif | |
8b3a46d2 | 44 | |
8df90dec KZ |
45 | #define turn_on(_flag, _opts) \ |
46 | do { \ | |
47 | (_opts) |= _flag; \ | |
48 | if (verbose) \ | |
49 | printf(_("Switching on %s.\n"), #_flag); \ | |
50 | } while(0) | |
51 | ||
f29a3d18 | 52 | #ifndef UNAME26 |
70eebc40 BH |
53 | # define UNAME26 0x0020000 |
54 | #endif | |
f29a3d18 | 55 | #ifndef ADDR_NO_RANDOMIZE |
2d281745 KZ |
56 | # define ADDR_NO_RANDOMIZE 0x0040000 |
57 | #endif | |
f29a3d18 | 58 | #ifndef FDPIC_FUNCPTRS |
2d281745 KZ |
59 | # define FDPIC_FUNCPTRS 0x0080000 |
60 | #endif | |
f29a3d18 | 61 | #ifndef MMAP_PAGE_ZERO |
2d281745 KZ |
62 | # define MMAP_PAGE_ZERO 0x0100000 |
63 | #endif | |
f29a3d18 | 64 | #ifndef ADDR_COMPAT_LAYOUT |
2d281745 KZ |
65 | # define ADDR_COMPAT_LAYOUT 0x0200000 |
66 | #endif | |
f29a3d18 | 67 | #ifndef READ_IMPLIES_EXEC |
2d281745 KZ |
68 | # define READ_IMPLIES_EXEC 0x0400000 |
69 | #endif | |
f29a3d18 | 70 | #ifndef ADDR_LIMIT_32BIT |
2d281745 KZ |
71 | # define ADDR_LIMIT_32BIT 0x0800000 |
72 | #endif | |
f29a3d18 | 73 | #ifndef SHORT_INODE |
2d281745 KZ |
74 | # define SHORT_INODE 0x1000000 |
75 | #endif | |
f29a3d18 | 76 | #ifndef WHOLE_SECONDS |
2d281745 KZ |
77 | # define WHOLE_SECONDS 0x2000000 |
78 | #endif | |
f29a3d18 | 79 | #ifndef STICKY_TIMEOUTS |
2d281745 KZ |
80 | # define STICKY_TIMEOUTS 0x4000000 |
81 | #endif | |
f29a3d18 | 82 | #ifndef ADDR_LIMIT_3GB |
2d281745 KZ |
83 | # define ADDR_LIMIT_3GB 0x8000000 |
84 | #endif | |
85 | ||
5edb0ea6 | 86 | |
1db8bf93 KZ |
87 | struct arch_domain { |
88 | int perval; /* PER_* */ | |
89 | const char *target_arch; | |
90 | const char *result_arch; | |
91 | }; | |
92 | ||
93 | ||
cbfa1442 | 94 | static void __attribute__((__noreturn__)) usage(int archwrapper) |
8b3a46d2 | 95 | { |
77eb13b9 | 96 | fputs(USAGE_HEADER, stdout); |
5edb0ea6 | 97 | if (!archwrapper) |
05541825 | 98 | printf(_(" %s [<arch>] [options] [<program> [<argument>...]]\n"), program_invocation_short_name); |
68243049 BS |
99 | else |
100 | printf(_(" %s [options] [<program> [<argument>...]]\n"), program_invocation_short_name); | |
451dbcfa BS |
101 | |
102 | fputs(USAGE_SEPARATOR, stdout); | |
103 | fputs(_("Change the reported architecture and set personality flags.\n"), stdout); | |
104 | ||
77eb13b9 | 105 | fputs(USAGE_OPTIONS, stdout); |
77eb13b9 | 106 | fputs(_(" -B, --32bit turns on ADDR_LIMIT_32BIT\n"), stdout); |
26b0b857 | 107 | fputs(_(" -F, --fdpic-funcptrs makes function pointers point to descriptors\n"), stdout); |
77eb13b9 | 108 | fputs(_(" -I, --short-inode turns on SHORT_INODE\n"), stdout); |
26b0b857 BS |
109 | fputs(_(" -L, --addr-compat-layout changes the way virtual memory is allocated\n"), stdout); |
110 | fputs(_(" -R, --addr-no-randomize disables randomization of the virtual address space\n"), stdout); | |
77eb13b9 SK |
111 | fputs(_(" -S, --whole-seconds turns on WHOLE_SECONDS\n"), stdout); |
112 | fputs(_(" -T, --sticky-timeouts turns on STICKY_TIMEOUTS\n"), stdout); | |
26b0b857 BS |
113 | fputs(_(" -X, --read-implies-exec turns on READ_IMPLIES_EXEC\n"), stdout); |
114 | fputs(_(" -Z, --mmap-page-zero turns on MMAP_PAGE_ZERO\n"), stdout); | |
77eb13b9 SK |
115 | fputs(_(" -3, --3gb limits the used address space to a maximum of 3 GB\n"), stdout); |
116 | fputs(_(" --4gb ignored (for backward compatibility only)\n"), stdout); | |
117 | fputs(_(" --uname-2.6 turns on UNAME26\n"), stdout); | |
26b0b857 | 118 | fputs(_(" -v, --verbose say what options are being switched on\n"), stdout); |
5edb0ea6 KZ |
119 | |
120 | if (!archwrapper) | |
121 | fputs(_(" --list list settable architectures, and exit\n"), stdout); | |
26b0b857 | 122 | |
77eb13b9 | 123 | fputs(USAGE_SEPARATOR, stdout); |
f45f3ec3 | 124 | printf(USAGE_HELP_OPTIONS(26)); |
77eb13b9 | 125 | printf(USAGE_MAN_TAIL("setarch(8)")); |
26b0b857 | 126 | |
77eb13b9 | 127 | exit(EXIT_SUCCESS); |
8b3a46d2 KZ |
128 | } |
129 | ||
1db8bf93 KZ |
130 | /* |
131 | * Returns inilialized list of all available execution domains. | |
132 | */ | |
133 | static struct arch_domain *init_arch_domains(void) | |
8b3a46d2 | 134 | { |
33e87bf1 | 135 | static struct utsname un; |
1db8bf93 | 136 | size_t i; |
77eb13b9 | 137 | |
1db8bf93 KZ |
138 | static struct arch_domain transitions[] = |
139 | { | |
77eb13b9 SK |
140 | {UNAME26, "uname26", NULL}, |
141 | {PER_LINUX32, "linux32", NULL}, | |
142 | {PER_LINUX, "linux64", NULL}, | |
8b3a46d2 | 143 | #if defined(__powerpc__) || defined(__powerpc64__) |
77eb13b9 SK |
144 | # ifdef __BIG_ENDIAN__ |
145 | {PER_LINUX32, "ppc32", "ppc"}, | |
146 | {PER_LINUX32, "ppc", "ppc"}, | |
147 | {PER_LINUX, "ppc64", "ppc64"}, | |
148 | {PER_LINUX, "ppc64pseries", "ppc64"}, | |
149 | {PER_LINUX, "ppc64iseries", "ppc64"}, | |
150 | # else | |
e60b6df5 KZ |
151 | {PER_LINUX32, "ppc32", "ppcle"}, |
152 | {PER_LINUX32, "ppc", "ppcle"}, | |
d9ca5dd4 RM |
153 | {PER_LINUX32, "ppc32le", "ppcle"}, |
154 | {PER_LINUX32, "ppcle", "ppcle"}, | |
155 | {PER_LINUX, "ppc64le", "ppc64le"}, | |
77eb13b9 | 156 | # endif |
8b3a46d2 KZ |
157 | #endif |
158 | #if defined(__x86_64__) || defined(__i386__) || defined(__ia64__) | |
77eb13b9 SK |
159 | {PER_LINUX32, "i386", "i386"}, |
160 | {PER_LINUX32, "i486", "i386"}, | |
161 | {PER_LINUX32, "i586", "i386"}, | |
162 | {PER_LINUX32, "i686", "i386"}, | |
163 | {PER_LINUX32, "athlon", "i386"}, | |
8b3a46d2 KZ |
164 | #endif |
165 | #if defined(__x86_64__) || defined(__i386__) | |
77eb13b9 | 166 | {PER_LINUX, "x86_64", "x86_64"}, |
8b3a46d2 KZ |
167 | #endif |
168 | #if defined(__ia64__) || defined(__i386__) | |
77eb13b9 | 169 | {PER_LINUX, "ia64", "ia64"}, |
8b3a46d2 | 170 | #endif |
782e198d | 171 | #if defined(__hppa__) |
77eb13b9 SK |
172 | {PER_LINUX32, "parisc32", "parisc"}, |
173 | {PER_LINUX32, "parisc", "parisc"}, | |
174 | {PER_LINUX, "parisc64", "parisc64"}, | |
782e198d | 175 | #endif |
8b3a46d2 | 176 | #if defined(__s390x__) || defined(__s390__) |
77eb13b9 SK |
177 | {PER_LINUX32, "s390", "s390"}, |
178 | {PER_LINUX, "s390x", "s390x"}, | |
8b3a46d2 KZ |
179 | #endif |
180 | #if defined(__sparc64__) || defined(__sparc__) | |
77eb13b9 SK |
181 | {PER_LINUX32, "sparc", "sparc"}, |
182 | {PER_LINUX32, "sparc32bash", "sparc"}, | |
183 | {PER_LINUX32, "sparc32", "sparc"}, | |
184 | {PER_LINUX, "sparc64", "sparc64"}, | |
8b3a46d2 KZ |
185 | #endif |
186 | #if defined(__mips64__) || defined(__mips__) | |
77eb13b9 SK |
187 | {PER_LINUX32, "mips32", "mips"}, |
188 | {PER_LINUX32, "mips", "mips"}, | |
189 | {PER_LINUX, "mips64", "mips64"}, | |
9e19737a BC |
190 | #endif |
191 | #if defined(__alpha__) | |
77eb13b9 SK |
192 | {PER_LINUX, "alpha", "alpha"}, |
193 | {PER_LINUX, "alphaev5", "alpha"}, | |
194 | {PER_LINUX, "alphaev56", "alpha"}, | |
195 | {PER_LINUX, "alphaev6", "alpha"}, | |
196 | {PER_LINUX, "alphaev67", "alpha"}, | |
146900d4 AS |
197 | #endif |
198 | #if defined(__e2k__) | |
199 | {PER_LINUX, "e2k", "e2k"}, | |
200 | {PER_LINUX, "e2kv4", "e2k"}, | |
201 | {PER_LINUX, "e2kv5", "e2k"}, | |
202 | {PER_LINUX, "e2kv6", "e2k"}, | |
203 | {PER_LINUX, "e2k4c", "e2k"}, | |
204 | {PER_LINUX, "e2k8c", "e2k"}, | |
205 | {PER_LINUX, "e2k1cp", "e2k"}, | |
206 | {PER_LINUX, "e2k8c2", "e2k"}, | |
207 | {PER_LINUX, "e2k12c", "e2k"}, | |
208 | {PER_LINUX, "e2k16c", "e2k"}, | |
209 | {PER_LINUX, "e2k2c3", "e2k"}, | |
9fd01b10 AG |
210 | #endif |
211 | #if defined(__arm__) || defined(__aarch64__) | |
212 | # ifdef __BIG_ENDIAN__ | |
213 | {PER_LINUX32, "armv7b", "arm"}, | |
214 | {PER_LINUX32, "armv8b", "arm"}, | |
215 | # else | |
216 | {PER_LINUX32, "armv7l", "arm"}, | |
217 | {PER_LINUX32, "armv8l", "arm"}, | |
218 | # endif | |
219 | {PER_LINUX32, "armh", "arm"}, | |
220 | {PER_LINUX32, "arm", "arm"}, | |
221 | {PER_LINUX, "arm64", "aarch64"}, | |
222 | {PER_LINUX, "aarch64", "aarch64"}, | |
8b3a46d2 | 223 | #endif |
77eb13b9 SK |
224 | /* place holder, will be filled up at runtime */ |
225 | {-1, NULL, NULL}, | |
226 | {-1, NULL, NULL} | |
227 | }; | |
228 | ||
229 | /* Add the trivial transition {PER_LINUX, machine, machine} if no | |
230 | * such target_arch is hardcoded yet. */ | |
231 | uname(&un); | |
232 | for (i = 0; transitions[i].perval >= 0; i++) | |
233 | if (!strcmp(un.machine, transitions[i].target_arch)) | |
234 | break; | |
235 | if (transitions[i].perval < 0) { | |
035fc2d9 TW |
236 | int wrdsz = sysfs_get_address_bits(NULL); |
237 | if (wrdsz < 0) | |
238 | wrdsz = CHAR_BIT * sizeof(void *); | |
77eb13b9 SK |
239 | if (wrdsz == 32 || wrdsz == 64) { |
240 | /* fill up the place holder */ | |
241 | transitions[i].perval = wrdsz == 32 ? PER_LINUX32 : PER_LINUX; | |
242 | transitions[i].target_arch = un.machine; | |
243 | transitions[i].result_arch = un.machine; | |
244 | } | |
ae2c3b5b | 245 | } |
1db8bf93 KZ |
246 | |
247 | return transitions; | |
248 | } | |
249 | ||
250 | /* | |
251 | * List all execution domains from transitions | |
252 | */ | |
253 | static void list_arch_domains(struct arch_domain *doms) | |
254 | { | |
255 | struct arch_domain *d; | |
256 | ||
257 | for (d = doms; d->target_arch != NULL; d++) | |
258 | printf("%s\n", d->target_arch); | |
259 | } | |
260 | ||
261 | static struct arch_domain *get_arch_domain(struct arch_domain *doms, const char *pers) | |
262 | { | |
263 | struct arch_domain *d; | |
264 | ||
cf5debba | 265 | for (d = doms; d && d->perval >= 0; d++) { |
1db8bf93 | 266 | if (!strcmp(pers, d->target_arch)) |
77eb13b9 | 267 | break; |
ae706576 | 268 | } |
1db8bf93 KZ |
269 | |
270 | return !d || d->perval < 0 ? NULL : d; | |
271 | } | |
272 | ||
7f48cfb0 | 273 | static void verify_arch_domain(struct arch_domain *doms, struct arch_domain *target, const char *wanted) |
1db8bf93 KZ |
274 | { |
275 | struct utsname un; | |
276 | ||
7f48cfb0 | 277 | if (!doms || !target || !target->result_arch) |
1db8bf93 KZ |
278 | return; |
279 | ||
77eb13b9 | 280 | uname(&un); |
7f48cfb0 AG |
281 | |
282 | if (!strcmp(un.machine, target->result_arch)) | |
283 | return; | |
284 | ||
9fd01b10 AG |
285 | if (!strcmp(target->result_arch, "i386") || |
286 | !strcmp(target->result_arch, "arm")) { | |
7f48cfb0 AG |
287 | struct arch_domain *dom; |
288 | for (dom = doms; dom->target_arch != NULL; dom++) { | |
289 | if (!dom->result_arch || strcmp(dom->result_arch, target->result_arch)) | |
290 | continue; | |
291 | if (!strcmp(dom->target_arch, un.machine)) | |
292 | return; | |
293 | } | |
77eb13b9 | 294 | } |
7f48cfb0 AG |
295 | |
296 | errx(EXIT_FAILURE, _("Kernel cannot set architecture to %s"), wanted); | |
8b3a46d2 KZ |
297 | } |
298 | ||
299 | int main(int argc, char *argv[]) | |
300 | { | |
5edb0ea6 | 301 | const char *arch = NULL; |
77eb13b9 SK |
302 | unsigned long options = 0; |
303 | int verbose = 0; | |
cbfa1442 | 304 | int archwrapper; |
77eb13b9 | 305 | int c; |
7f48cfb0 | 306 | struct arch_domain *doms = NULL, *target = NULL; |
1db8bf93 | 307 | unsigned long pers_value = 0; |
3fa06e04 | 308 | char *shell = NULL, *shell_arg = NULL; |
77eb13b9 | 309 | |
5edb0ea6 KZ |
310 | /* Options without equivalent short options */ |
311 | enum { | |
312 | OPT_4GB = CHAR_MAX + 1, | |
313 | OPT_UNAME26, | |
314 | OPT_LIST | |
315 | }; | |
316 | ||
9e930041 | 317 | /* Options --3gb and --4gb are for compatibility with an old |
77eb13b9 SK |
318 | * Debian setarch implementation. */ |
319 | static const struct option longopts[] = { | |
320 | {"help", no_argument, NULL, 'h'}, | |
321 | {"version", no_argument, NULL, 'V'}, | |
322 | {"verbose", no_argument, NULL, 'v'}, | |
323 | {"addr-no-randomize", no_argument, NULL, 'R'}, | |
324 | {"fdpic-funcptrs", no_argument, NULL, 'F'}, | |
325 | {"mmap-page-zero", no_argument, NULL, 'Z'}, | |
326 | {"addr-compat-layout", no_argument, NULL, 'L'}, | |
327 | {"read-implies-exec", no_argument, NULL, 'X'}, | |
328 | {"32bit", no_argument, NULL, 'B'}, | |
329 | {"short-inode", no_argument, NULL, 'I'}, | |
330 | {"whole-seconds", no_argument, NULL, 'S'}, | |
331 | {"sticky-timeouts", no_argument, NULL, 'T'}, | |
332 | {"3gb", no_argument, NULL, '3'}, | |
333 | {"4gb", no_argument, NULL, OPT_4GB}, | |
334 | {"uname-2.6", no_argument, NULL, OPT_UNAME26}, | |
5edb0ea6 | 335 | {"list", no_argument, NULL, OPT_LIST}, |
77eb13b9 SK |
336 | {NULL, 0, NULL, 0} |
337 | }; | |
338 | ||
339 | setlocale(LC_ALL, ""); | |
340 | bindtextdomain(PACKAGE, LOCALEDIR); | |
341 | textdomain(PACKAGE); | |
2c308875 | 342 | close_stdout_atexit(); |
77eb13b9 | 343 | |
7a87a774 RM |
344 | if (argc < 1) { |
345 | warnx(_("Not enough arguments")); | |
346 | errtryhelp(EXIT_FAILURE); | |
347 | } | |
5edb0ea6 | 348 | archwrapper = strcmp(program_invocation_short_name, "setarch") != 0; |
cbfa1442 | 349 | if (archwrapper) { |
5edb0ea6 | 350 | arch = program_invocation_short_name; /* symlinks to setarch */ |
3fa06e04 KZ |
351 | |
352 | /* Don't use ifdef sparc here, we get "Unrecognized architecture" | |
353 | * error message later if necessary */ | |
cbfa1442 | 354 | if (strcmp(arch, "sparc32bash") == 0) { |
3fa06e04 KZ |
355 | shell = "/bin/bash"; |
356 | shell_arg = ""; | |
357 | goto set_arch; | |
cbfa1442 | 358 | } |
cbfa1442 | 359 | } else { |
00b5ef70 | 360 | if (1 < argc && *argv[1] != '-') { |
5edb0ea6 KZ |
361 | arch = argv[1]; |
362 | argv[1] = argv[0]; /* for getopt_long() to get the program name */ | |
363 | argv++; | |
364 | argc--; | |
77eb13b9 SK |
365 | } |
366 | } | |
5edb0ea6 | 367 | |
77eb13b9 SK |
368 | while ((c = getopt_long(argc, argv, "+hVv3BFILRSTXZ", longopts, NULL)) != -1) { |
369 | switch (c) { | |
77eb13b9 SK |
370 | case 'v': |
371 | verbose = 1; | |
372 | break; | |
373 | case 'R': | |
374 | turn_on(ADDR_NO_RANDOMIZE, options); | |
375 | break; | |
376 | case 'F': | |
377 | turn_on(FDPIC_FUNCPTRS, options); | |
378 | break; | |
379 | case 'Z': | |
380 | turn_on(MMAP_PAGE_ZERO, options); | |
381 | break; | |
382 | case 'L': | |
383 | turn_on(ADDR_COMPAT_LAYOUT, options); | |
384 | break; | |
385 | case 'X': | |
386 | turn_on(READ_IMPLIES_EXEC, options); | |
387 | break; | |
388 | case 'B': | |
389 | turn_on(ADDR_LIMIT_32BIT, options); | |
390 | break; | |
391 | case 'I': | |
392 | turn_on(SHORT_INODE, options); | |
393 | break; | |
394 | case 'S': | |
395 | turn_on(WHOLE_SECONDS, options); | |
396 | break; | |
397 | case 'T': | |
398 | turn_on(STICKY_TIMEOUTS, options); | |
399 | break; | |
400 | case '3': | |
401 | turn_on(ADDR_LIMIT_3GB, options); | |
402 | break; | |
403 | case OPT_4GB: /* just ignore this one */ | |
404 | break; | |
405 | case OPT_UNAME26: | |
406 | turn_on(UNAME26, options); | |
407 | break; | |
5edb0ea6 KZ |
408 | case OPT_LIST: |
409 | if (!archwrapper) { | |
1db8bf93 | 410 | list_arch_domains(init_arch_domains()); |
b2b5b502 | 411 | return EXIT_SUCCESS; |
5edb0ea6 KZ |
412 | } else |
413 | warnx(_("unrecognized option '--list'")); | |
9a8fada1 | 414 | /* fallthrough */ |
2c308875 | 415 | |
77eb13b9 | 416 | default: |
677ec86c | 417 | errtryhelp(EXIT_FAILURE); |
2c308875 KZ |
418 | case 'h': |
419 | usage(archwrapper); | |
420 | case 'V': | |
421 | print_version(EXIT_SUCCESS); | |
77eb13b9 SK |
422 | } |
423 | } | |
8b3a46d2 | 424 | |
05541825 KZ |
425 | if (!arch && !options) |
426 | errx(EXIT_FAILURE, _("no architecture argument or personality flags specified")); | |
5edb0ea6 | 427 | |
77eb13b9 SK |
428 | argc -= optind; |
429 | argv += optind; | |
8df90dec | 430 | |
3fa06e04 | 431 | set_arch: |
05541825 KZ |
432 | /* get execution domain (architecture) */ |
433 | if (arch) { | |
434 | doms = init_arch_domains(); | |
435 | target = get_arch_domain(doms, arch); | |
1db8bf93 | 436 | |
05541825 KZ |
437 | if (!target) |
438 | errx(EXIT_FAILURE, _("%s: Unrecognized architecture"), arch); | |
439 | pers_value = target->perval; | |
440 | } | |
441 | ||
442 | /* add personality flags */ | |
443 | pers_value |= options; | |
1db8bf93 | 444 | |
05541825 | 445 | /* call kernel */ |
1db8bf93 KZ |
446 | if (personality(pers_value) < 0) { |
447 | /* | |
448 | * Depending on architecture and kernel version, personality | |
449 | * syscall is either capable or incapable of returning an error. | |
450 | * If the return value is not an error, then it's the previous | |
451 | * personality value, which can be an arbitrary value | |
452 | * undistinguishable from an error value. | |
453 | * To make things clear, a second call is needed. | |
454 | */ | |
455 | if (personality(pers_value) < 0) | |
456 | err(EXIT_FAILURE, _("failed to set personality to %s"), arch); | |
457 | } | |
458 | ||
05541825 KZ |
459 | /* make sure architecture is set as expected */ |
460 | if (arch) | |
7f48cfb0 | 461 | verify_arch_domain(doms, target, arch); |
8b3a46d2 | 462 | |
3fa06e04 KZ |
463 | if (!argc) { |
464 | shell = "/bin/sh"; | |
465 | shell_arg = "-sh"; | |
466 | } | |
9508e297 | 467 | if (verbose) { |
3fa06e04 | 468 | printf(_("Execute command `%s'.\n"), shell ? shell : argv[0]); |
9508e297 RM |
469 | /* flush all output streams before exec */ |
470 | fflush(NULL); | |
471 | } | |
34c265f0 | 472 | |
3fa06e04 KZ |
473 | /* Execute shell */ |
474 | if (shell) { | |
1b10fa0e | 475 | execl(shell, shell_arg, (char *)NULL); |
3fa06e04 | 476 | errexec(shell); |
77eb13b9 | 477 | } |
8b3a46d2 | 478 | |
3fa06e04 | 479 | /* Execute on command line specified command */ |
77eb13b9 | 480 | execvp(argv[0], argv); |
fd777151 | 481 | errexec(argv[0]); |
8b3a46d2 | 482 | } |