[thirdparty/glibc.git] / sysdeps / unix / bsd / sigprocmask.c

/* Copyright (C) 1991, 1992, 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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <errno.h>
#include <stddef.h>
#include <signal.h>


/* If SET is not NULL, modify the current set of blocked signals
   according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
   If OSET is not NULL, store the old set of blocked signals in *OSET.  */
int
__sigprocmask (how, set, oset)
     int how;
     const sigset_t *set;
     sigset_t *oset;
{
  int mask;

  if (set != NULL)
    {
      mask = *set;
      switch (how)
	{
	case SIG_BLOCK:
	  mask = __sigblock (mask);
	  break;

	case SIG_UNBLOCK:
	  mask = __sigblock (0) & ~mask;
	  /* Fall through.  */

	case SIG_SETMASK:
	  mask = __sigsetmask (mask);
	  break;

	default:
	  __set_errno (EINVAL);
	  return -1;
	}
    }
  else
    mask = __sigblock (0);

  if (oset != NULL)
    *oset = mask;

  return 0;
}

weak_alias (__sigprocmask, sigprocmask)
Commit	Line	Data
c4029823	1	/* Copyright (C) 1991, 1992, 1995, 1996 Free Software Foundation, Inc.
28f540f4 RM	2	This file is part of the GNU C Library.
	3
	4	The GNU C Library is free software; you can redistribute it and/or
	5	modify it under the terms of the GNU Library General Public License as
	6	published by the Free Software Foundation; either version 2 of the
	7	License, or (at your option) any later version.
	8
	9	The GNU C Library is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	12	Library General Public License for more details.
	13
	14	You should have received a copy of the GNU Library General Public
	15	License along with the GNU C Library; see the file COPYING.LIB. If
	16	not, write to the Free Software Foundation, Inc., 675 Mass Ave,
	17	Cambridge, MA 02139, USA. */
	18
28f540f4 RM	19	#include <errno.h>
	20	#include <stddef.h>
	21	#include <signal.h>
	22
	23
	24	/* If SET is not NULL, modify the current set of blocked signals
	25	according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
	26	If OSET is not NULL, store the old set of blocked signals in OSET. /
	27	int
c4029823 UD	28	__sigprocmask (how, set, oset)
	29	int how;
	30	const sigset_t *set;
	31	sigset_t *oset;
28f540f4 RM	32	{
	33	int mask;
	34
	35	if (set != NULL)
	36	{
	37	mask = *set;
	38	switch (how)
	39	{
	40	case SIG_BLOCK:
c4029823	41	mask = __sigblock (mask);
28f540f4 RM	42	break;
	43
	44	case SIG_UNBLOCK:
	45	mask = __sigblock (0) & ~mask;
	46	/* Fall through. */
	47
	48	case SIG_SETMASK:
c4029823	49	mask = __sigsetmask (mask);
28f540f4 RM	50	break;
	51
	52	default:
c4029823	53	__set_errno (EINVAL);
28f540f4 RM	54	return -1;
	55	}
	56	}
	57	else
c4029823	58	mask = __sigblock (0);
28f540f4 RM	59
	60	if (oset != NULL)
	61	*oset = mask;
	62
	63	return 0;
	64	}
	65
	66	weak_alias (__sigprocmask, sigprocmask)