busybox/util-linux/setarch.c

/* vi: set sw=4 ts=4: */
/*
 * linux32/linux64 allows for changing uname emulation.
 *
 * Copyright 2002 Andi Kleen, SuSE Labs.
 *
 * Licensed under GPL v2 or later, see file License for details.
*/

#include <sys/personality.h>

#include "libbb.h"

int setarch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int setarch_main(int argc UNUSED_PARAM, char **argv)
{
	int pers;

	/* Figure out what personality we are supposed to switch to ...
	 * we can be invoked as either:
	 * argv[0],argv[1] == "setarch","personality"
	 * argv[0]         == "personality"
	 */
	if (ENABLE_SETARCH && applet_name[0] == 's'
	 && argv[1] && strncpy(argv[1], "linux", 5)
	) {
		applet_name = argv[1];
		argv++;
	}
	if (applet_name[5] == '6') /* linux64 */
		pers = PER_LINUX;
	else if (applet_name[5] == '3') /* linux32 */
		pers = PER_LINUX32;
	else
		bb_show_usage();

	argv++;
	if (argv[0] == NULL)
		bb_show_usage();

	/* Try to set personality */
	if (personality(pers) >= 0) {
		/* Try to execute the program */
		BB_EXECVP(argv[0], argv);
	}

	bb_simple_perror_msg_and_die(argv[0]);
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* linux32/linux64 allows for changing uname emulation.
4	*
5	* Copyright 2002 Andi Kleen, SuSE Labs.
6	*
7	* Licensed under GPL v2 or later, see file License for details.
8	*/
9
10	#include <sys/personality.h>
11
12	#include "libbb.h"
13
14	int setarch_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
15	int setarch_main(int argc UNUSED_PARAM, char **argv)
16	{
17	int pers;
18
19	/* Figure out what personality we are supposed to switch to ...
20	* we can be invoked as either:
21	* argv[0],argv[1] == "setarch","personality"
22	* argv[0] == "personality"
23	*/
24	if (ENABLE_SETARCH && applet_name[0] == 's'
25	&& argv[1] && strncpy(argv[1], "linux", 5)
26	) {
27	applet_name = argv[1];
28	argv++;
29	}
30	if (applet_name[5] == '6') /* linux64 */
31	pers = PER_LINUX;
32	else if (applet_name[5] == '3') /* linux32 */
33	pers = PER_LINUX32;
34	else
35	bb_show_usage();
36
37	argv++;
38	if (argv[0] == NULL)
39	bb_show_usage();
40
41	/* Try to set personality */
42	if (personality(pers) >= 0) {
43	/* Try to execute the program */
44	BB_EXECVP(argv[0], argv);
45	}
46
47	bb_simple_perror_msg_and_die(argv[0]);
48	}