0edbdd8ac
Denis Vlasenko
2008-04-01
Subject
xfunc_die: resurrect (actually, it's "svn add" being forgotten again)
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libbb/xfunc_die.c+40 -0
| @@ -0,0 +1,40 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * Utility routines. |
| + | * |
| + | * Copyright (C) 2008 by Denys Vlasenko <[email protected]> |
| + | * |
| + | * 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); |
| + | } |