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sigflag.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped

#include <ast.h>

#if _lib_sigflag

NoN(sigflag)

#else

#include <sig.h>

int
sigflag(int sig, int flags, int set)
{
#if _lib_sigaction
      struct sigaction  sa;

      if (sigaction(sig, NiL, &sa))
            return -1;
      if (set)
            sa.sa_flags |= flags;
      else
            sa.sa_flags &= ~flags;
      return sigaction(sig, &sa, NiL);
#else
      return -1;
#endif
}

#endif

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