busybox/libbb/xfunc_die.c

/* vi: set sw=4 ts=4: */
/*
 * Utility routines.
 *
 * Copyright (C) 2008 by Denys Vlasenko <vda.linux@googlemail.com>
 *
 * Licensed under GPLv2, see file LICENSE in this tarball for details.
 */

/* Keeping it separate allows to NOT suck in stdio for VERY small applets.
 * Try building busybox with only "true" enabled... */

#include "libbb.h"

int die_sleep;
#if ENABLE_FEATURE_PREFER_APPLETS || ENABLE_HUSH
jmp_buf die_jmp;
#endif

void FAST_FUNC xfunc_die(void)
{
	if (die_sleep) {
		if ((ENABLE_FEATURE_PREFER_APPLETS || ENABLE_HUSH)
		 && die_sleep < 0
		) {
			/* Special case. We arrive here if NOFORK applet
			 * calls xfunc, which then decides to die.
			 * We don't die, but jump instead back to caller.
			 * NOFORK applets still cannot carelessly call xfuncs:
			 * p = xmalloc(10);
			 * q = xmalloc(10); // BUG! if this dies, we leak p!
			 */
			/* -2222 means "zero" (longjmp can't pass 0)
			 * run_nofork_applet() catches -2222. */
			longjmp(die_jmp, xfunc_error_retval ? xfunc_error_retval : -2222);
		}
		sleep(die_sleep);
	}
	exit(xfunc_error_retval);
}
1	niro	816	/* vi: set sw=4 ts=4: */
2			/*
3			* Utility routines.
4			*
5			* Copyright (C) 2008 by Denys Vlasenko <vda.linux@googlemail.com>
6			*
7			* Licensed under GPLv2, see file LICENSE in this tarball for details.
8			*/
9
10			/* Keeping it separate allows to NOT suck in stdio for VERY small applets.
11			* Try building busybox with only "true" enabled... */
12
13			#include "libbb.h"
14
15			int die_sleep;
16			#if ENABLE_FEATURE_PREFER_APPLETS \|\| ENABLE_HUSH
17			jmp_buf die_jmp;
18			#endif
19
20			void FAST_FUNC xfunc_die(void)
21			{
22			if (die_sleep) {
23			if ((ENABLE_FEATURE_PREFER_APPLETS \|\| ENABLE_HUSH)
24			&& die_sleep < 0
25			) {
26			/* Special case. We arrive here if NOFORK applet
27			* calls xfunc, which then decides to die.
28			* We don't die, but jump instead back to caller.
29			* NOFORK applets still cannot carelessly call xfuncs:
30			* p = xmalloc(10);
31			* q = xmalloc(10); // BUG! if this dies, we leak p!
32			*/
33			/* -2222 means "zero" (longjmp can't pass 0)
34			* run_nofork_applet() catches -2222. */
35			longjmp(die_jmp, xfunc_error_retval ? xfunc_error_retval : -2222);
36			}
37			sleep(die_sleep);
38			}
39			exit(xfunc_error_retval);
40			}