1/* 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
15int die_sleep;
16#if ENABLE_FEATURE_PREFER_APPLETS || ENABLE_HUSH
17jmp_buf die_jmp;
18#endif
19
20void 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}
41