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xfunc_die: resurrect (actually, it's "svn add" being forgotten again)

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This commit is contained in:
Denis Vlasenko 2008-04-01 17:43:03 +00:00
parent c59d802a5a
commit 0edbdd8ac8
1 changed files with 40 additions and 0 deletions
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40
libbb/xfunc_die.c Normal file
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/* 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 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);
}