1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* Copyright (C) 1991,1995,1996,1997,1999,2001 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. 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);
break;
case ef_cxa2:
(*f->func.cxa2.fn) (status, f->func.cxa2.arg);
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);
}
|
