File: sigprocmask.c

package info (click to toggle)
glibc 2.24-10
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 223,412 kB
  • sloc: ansic: 991,967; asm: 261,800; sh: 10,385; makefile: 9,710; cpp: 4,169; python: 3,971; perl: 2,254; awk: 1,753; pascal: 1,521; yacc: 291; sed: 80
file content (56 lines) | stat: -rw-r--r-- 1,790 bytes parent folder | download | duplicates (5)
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
/* Copyright (C) 1997-2016 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, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <signal.h>
#include <string.h>  /* Needed for string function builtin redirection.  */
#include <unistd.h>

#include <sysdep.h>
#include <sys/syscall.h>

#include <nptl/pthreadP.h>              /* SIGCANCEL, SIGSETXID */


/* Get and/or change the set of blocked signals.  */
int
__sigprocmask (int how, const sigset_t *set, sigset_t *oset)
{
#ifdef SIGCANCEL
  sigset_t local_newmask;

  /* The only thing we have to make sure here is that SIGCANCEL and
     SIGSETXID are not blocked.  */
  if (set != NULL
      && (__builtin_expect (__sigismember (set, SIGCANCEL), 0)
# ifdef SIGSETXID
	  || __builtin_expect (__sigismember (set, SIGSETXID), 0)
# endif
	  ))
    {
      local_newmask = *set;
      __sigdelset (&local_newmask, SIGCANCEL);
# ifdef SIGSETXID
      __sigdelset (&local_newmask, SIGSETXID);
# endif
      set = &local_newmask;
    }
#endif

  return INLINE_SYSCALL (rt_sigprocmask, 4, how, set, oset, _NSIG / 8);
}
weak_alias (__sigprocmask, sigprocmask)