File: sigintr.c

package info (click to toggle)
glibc 2.19-18+deb8u7
  • links: PTS, VCS
  • area: main
  • in suites: jessie-backports
  • size: 204,748 kB
  • sloc: ansic: 970,427; asm: 241,207; sh: 10,069; makefile: 8,476; cpp: 3,595; perl: 2,077; pascal: 1,839; awk: 1,704; yacc: 317; sed: 73
file content (56 lines) | stat: -rw-r--r-- 1,643 bytes parent folder | download | duplicates (10)
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) 1992-2014 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 <stddef.h>
#include <signal.h>
#include <errno.h>

/* If INTERRUPT is nonzero, make signal SIG interrupt system calls
   (causing them to fail with EINTR); if INTERRUPT is zero, make system
   calls be restarted after signal SIG.  */
int
siginterrupt (sig, interrupt)
     int sig;
     int interrupt;
{
#ifdef	SA_RESTART
  extern sigset_t _sigintr attribute_hidden;	/* Defined in signal.c.  */
  struct sigaction action;

  if (__sigaction (sig, (struct sigaction *) NULL, &action) < 0)
    return -1;

  if (interrupt)
    {
      __sigaddset (&_sigintr, sig);
      action.sa_flags &= ~SA_RESTART;
    }
  else
    {
      __sigdelset (&_sigintr, sig);
      action.sa_flags |= SA_RESTART;
    }

  if (__sigaction (sig, &action, (struct sigaction *) NULL) < 0)
    return -1;

  return 0;
#else
  __set_errno (ENOSYS);
  return -1;
#endif
}