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      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 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
     23 /*	  All Rights Reserved	*/
     24 
     25 
     26 /*
     27  * Copyright 1994-2003 Sun Microsystems, Inc.  All rights reserved.
     28  * Use is subject to license terms.
     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/procset.h>
     41 #include <sys/signal.h>
     42 #include <sys/schedctl.h>
     43 #include <sys/debug.h>
     44 
     45 int
     46 sigsuspend(sigset_t *setp)
     47 {
     48 	sigset_t set;
     49 	k_sigset_t kset;
     50 	proc_t *p = curproc;
     51 
     52 	if (copyin((caddr_t)setp, (caddr_t)&set, sizeof (sigset_t)))
     53 		return (set_errno(EFAULT));
     54 	sigutok(&set, &kset);
     55 	mutex_enter(&p->p_lock);
     56 	schedctl_finish_sigblock(curthread);
     57 	ttolwp(curthread)->lwp_sigoldmask = curthread->t_hold;
     58 	curthread->t_hold = kset;
     59 	curthread->t_sig_check = 1;	/* so post-syscall will re-evaluate */
     60 	curthread->t_flag |= T_TOMASK;
     61 	/* pause() */
     62 	while (cv_wait_sig_swap(&curthread->t_delay_cv, &p->p_lock))
     63 		;
     64 	mutex_exit(&p->p_lock);
     65 	return (set_errno(EINTR));
     66 }
     67