usr/src/lib/libast/common/comp/sigflag.c

   1 /***********************************************************************
   2 *                                                                      *
   3 *               This software is part of the ast package               *
   4 *          Copyright (c) 1985-2010 AT&T Intellectual Property          *
   5 *                      and is licensed under the                       *
   6 *                  Common Public License, Version 1.0                  *
   7 *                    by AT&T Intellectual Property                     *
   8 *                                                                      *
   9 *                A copy of the License is available at                 *
  10 *            http://www.opensource.org/licenses/cpl1.0.txt             *
  11 *         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
  12 *                                                                      *
  13 *              Information and Software Systems Research               *
  14 *                            AT&T Research                             *
  15 *                           Florham Park NJ                            *
  16 *                                                                      *
  17 *                 Glenn Fowler <gsf@research.att.com>                  *
  18 *                  David Korn <dgk@research.att.com>                   *
  19 *                   Phong Vo <kpv@research.att.com>                    *
  20 *                                                                      *
  21 ***********************************************************************/
  22 #pragma prototyped
  23
  24 #include <ast.h>
  25
  26 #if _lib_sigflag
  27
  28 NoN(sigflag)
  29
  30 #else
  31
  32 #include <sig.h>
  33
  34 int
  35 sigflag(int sig, int flags, int set)
  36 {
  37 #if _lib_sigaction
  38         struct sigaction        sa;
  39
  40         if (sigaction(sig, NiL, &sa))
  41                 return -1;
  42         if (set)
  43                 sa.sa_flags |= flags;
  44         else
  45                 sa.sa_flags &= ~flags;
  46         return sigaction(sig, &sa, NiL);
  47 #else
  48         return -1;
  49 #endif
  50 }
  51
  52 #endif