kernel/syscall/sigpending.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  * Copyright 1994-2003 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29
  30
  31 #pragma ident   "%Z%%M% %I%     %E% SMI"
  32
  33 #include <sys/param.h>
  34 #include <sys/types.h>
  35 #include <sys/sysmacros.h>
  36 #include <sys/systm.h>
  37 #include <sys/errno.h>
  38 #include <sys/proc.h>
  39 #include <sys/fault.h>
  40 #include <sys/signal.h>
  41 #include <sys/schedctl.h>
  42 #include <sys/debug.h>
  43
  44 int
  45 sigpending(int flag, sigset_t *setp)
  46 {
  47         sigset_t set;
  48         k_sigset_t kset;
  49         proc_t *p;
  50
  51         switch (flag) {
  52         case 1: /* sigpending */
  53                 p = ttoproc(curthread);
  54                 mutex_enter(&p->p_lock);
  55                 schedctl_finish_sigblock(curthread);
  56                 kset = p->p_sig;
  57                 sigorset(&kset, &curthread->t_sig);
  58                 sigandset(&kset, &curthread->t_hold);
  59                 mutex_exit(&p->p_lock);
  60                 break;
  61         case 2: /* sigfillset */
  62                 kset = fillset;
  63                 break;
  64         default:
  65                 return (set_errno(EINVAL));
  66         }
  67
  68         sigktou(&kset, &set);
  69         if (copyout((caddr_t)&set, (caddr_t)setp, sizeof (sigset_t)))
  70                 return (set_errno(EFAULT));
  71         return (0);
  72 }