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
|
/* Copyright (C) 1991, 1994, 1995, 1996 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>
/* Block signals in MASK, returning the old mask. */
int
__sigblock (mask)
int mask;
{
register int sig;
sigset_t set, oset;
if (__sigemptyset (&set) < 0)
return -1;
if (sizeof (mask) == sizeof (set))
*(int *) &set = mask;
else if (sizeof (unsigned long int) == sizeof (set))
*(unsigned long int *) &set = (unsigned int) mask;
else
for (sig = 1; sig < NSIG; ++sig)
if ((mask & sigmask (sig)) && __sigaddset (&set, sig) < 0)
return -1;
if (sigprocmask (SIG_BLOCK, &set, &oset) < 0)
return -1;
if (sizeof (mask) == sizeof (oset))
mask = *(int *) &oset;
else if (sizeof (unsigned long int) == sizeof (oset))
mask = *(unsigned long int*) &oset;
else
for (sig = 1, mask = 0; sig < NSIG; ++sig)
if (__sigismember (&oset, sig))
mask |= sigmask (sig);
return mask;
}
weak_alias (__sigblock, sigblock)
|
