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
|
/* Copyright (C) 1997, 1998, 1999 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 <errno.h>
#include <signal.h>
#include <unistd.h>
#include <sysdep.h>
#include <sys/syscall.h>
#include "kernel-features.h"
extern int __syscall_sigpending (sigset_t *);
extern int __syscall_rt_sigpending (sigset_t *, size_t);
/* The variable is shared between all wrappers around signal handling
functions which have RT equivalents. The definition is in sigaction.c. */
extern int __libc_missing_rt_sigs;
/* Change the set of blocked signals to SET,
wait until a signal arrives, and restore the set of blocked signals. */
int
sigpending (set)
sigset_t *set;
{
#if __ASSUME_REALTIME_SIGNALS > 0
return INLINE_SYSCALL (rt_sigpending, 2, set, _NSIG / 8);
#else
# ifdef __NR_rt_pending
/* First try the RT signals. */
if (!__libc_missing_rt_sigs)
{
/* XXX The size argument hopefully will have to be changed to the
real size of the user-level sigset_t. */
int saved_errno = errno;
int result = INLINE_SYSCALL (rt_sigpending, 2, set, _NSIG / 8);
if (result >= 0 || errno != ENOSYS)
return result;
__set_errno (saved_errno);
__libc_missing_rt_sigs = 1;
}
# endif
return INLINE_SYSCALL (sigpending, 1, set);
#endif
}
|
GitWeb
