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glibc/stdlib/exit.c
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/* Copyright (C) 1991,95,96,97,99,2001,02 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library is distributed in the hope that it will be useful, | |
but WITHOUT ANY WARRANTY; without even the implied warranty of | |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, write to the Free | |
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | |
02111-1307 USA. */ | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <unistd.h> | |
#include "exit.h" | |
#ifdef HAVE_GNU_LD | |
#include "set-hooks.h" | |
DEFINE_HOOK (__libc_atexit, (void)) | |
#endif | |
/* Call all functions registered with `atexit' and `on_exit', | |
in the reverse of the order in which they were registered | |
perform stdio cleanup, and terminate program execution with STATUS. */ | |
void | |
exit (int status) | |
{ | |
/* We do it this way to handle recursive calls to exit () made by | |
the functions registered with `atexit' and `on_exit'. We call | |
everyone on the list and use the status value in the last | |
exit (). */ | |
while (__exit_funcs != NULL) | |
{ | |
struct exit_function_list *old; | |
while (__exit_funcs->idx > 0) | |
{ | |
const struct exit_function *const f = | |
&__exit_funcs->fns[--__exit_funcs->idx]; | |
switch (f->flavor) | |
{ | |
case ef_free: | |
case ef_us: | |
break; | |
case ef_on: | |
(*f->func.on.fn) (status, f->func.on.arg); | |
break; | |
case ef_at: | |
(*f->func.at) (); | |
break; | |
case ef_cxa: | |
(*f->func.cxa.fn) (f->func.cxa.arg, status); | |
break; | |
} | |
} | |
old = __exit_funcs; | |
__exit_funcs = __exit_funcs->next; | |
if (__exit_funcs != NULL) | |
/* Don't free the last element in the chain, this is the statically | |
allocate element. */ | |
free (old); | |
} | |
#ifdef HAVE_GNU_LD | |
RUN_HOOK (__libc_atexit, ()); | |
#else | |
{ | |
extern void _cleanup (void); | |
_cleanup (); | |
} | |
#endif | |
_exit (status); | |
} | |
libc_hidden_def (exit) |