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 #include <sys/param.h>
32 #include <sys/types.h>
33 #include <sys/sysmacros.h>
34 #include <sys/systm.h>
35 #include <sys/errno.h>
36 #include <sys/proc.h>
37 #include <sys/fault.h>
38 #include <sys/procset.h>
39 #include <sys/signal.h>
40 #include <sys/schedctl.h>
41 #include <sys/debug.h>
42
43 int
sigsuspend(sigset_t * setp)44 sigsuspend(sigset_t *setp)
45 {
46 sigset_t set;
47 k_sigset_t kset;
48 proc_t *p = curproc;
49
50 if (copyin((caddr_t)setp, (caddr_t)&set, sizeof (sigset_t)))
51 return (set_errno(EFAULT));
52 sigutok(&set, &kset);
53 mutex_enter(&p->p_lock);
54 schedctl_finish_sigblock(curthread);
55 ttolwp(curthread)->lwp_sigoldmask = curthread->t_hold;
56 curthread->t_hold = kset;
57 curthread->t_sig_check = 1; /* so post-syscall will re-evaluate */
58 curthread->t_flag |= T_TOMASK;
59 /* pause() */
60 while (cv_wait_sig_swap(&curthread->t_delay_cv, &p->p_lock))
61 ;
62 mutex_exit(&p->p_lock);
63 return (set_errno(EINTR));
64 }
65