[apple/libc.git] / compat-43 / sigcompat.c

/*
 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/*
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if __DARWIN_UNIX03
#ifdef VARIANT_CANCELABLE
#include <pthread.h>

extern void _pthread_testcancel(pthread_t thread, int isconforming);
#endif /* VARIANT_CANCELABLE */
extern int __unix_conforming;
#endif /* __DARWIN_UNIX03 */

#include <sys/param.h>
#include <signal.h>
#include <errno.h>

#ifndef BUILDING_VARIANT
#if defined(__DYNAMIC__)
extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);
#endif

static int
sigvec__(signo, sv, osv, bind)
	int signo;
	struct sigvec *sv, *osv;
	int bind;
{
	int ret;

	if (sv)
		sv->sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
#if defined(__DYNAMIC__)
        if (bind) {
#endif
            ret = sigaction(signo, (struct sigaction *)sv, (struct sigaction *)osv);
#if defined(__DYNAMIC__)
	} else {
            ret = _sigaction_nobind(signo, (struct sigaction *)sv, (struct sigaction *)osv);
        }
#endif
        if (ret == 0 && osv)
		osv->sv_flags ^= SV_INTERRUPT;	/* !SA_INTERRUPT */
	return (ret);
}

int
sigvec(signo, sv, osv)
        int signo;
        struct sigvec *sv, *osv;
{
    return sigvec__(signo, sv, osv, 1);
}

#if defined(__DYNAMIC__)
int
_sigvec_nobind(signo, sv, osv)
        int signo;
        struct sigvec *sv, *osv;
{
    return sigvec__(signo, sv, osv, 0);
}
#endif

int
sigsetmask(mask)
	int mask;
{
	int omask, n;

	n = sigprocmask(SIG_SETMASK, (sigset_t *) &mask, (sigset_t *) &omask);
	if (n)
		return (n);
	return (omask);
}

int
sigblock(mask)
	int mask;
{
	int omask, n;

	n = sigprocmask(SIG_BLOCK, (sigset_t *) &mask, (sigset_t *) &omask);
	if (n)
		return (n);
	return (omask);
}
#endif /* !BUILDING_VARIANT */

#if __DARWIN_UNIX03
int
sigpause(sig)
	int sig;
{
	sigset_t mask;

	if (__unix_conforming == 0)
		__unix_conforming = 1;
#ifdef VARIANT_CANCELABLE
	_pthread_testcancel(pthread_self(), 1);
#endif /* VARIANT_CANCELABLE */

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return(-1);
	}
	if (sigprocmask(SIG_BLOCK, (sigset_t *) 0, (sigset_t *) &mask) < 0) {
		return(-1);
	}
	sigdelset(&mask, sig);
	return (sigsuspend(&mask));
}
#else
int
sigpause(mask)
	int mask;
{
	return (sigsuspend((sigset_t *)&mask));
}
#endif /* __DARWIN_UNIX03 */

#ifndef BUILDING_VARIANT
int
sighold(sig)
	int sig;
{
	sigset_t mask;

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return(-1);
	}
	sigemptyset(&mask);
	sigaddset(&mask, sig);
	return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0));
}

int
sigrelse(sig)
	int sig;
{
	sigset_t mask;

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return(-1);
	}
	sigemptyset(&mask);
	sigaddset(&mask, sig);
	return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0));
}


int
sigignore(sig)
	int sig;
{
	return (signal(sig, SIG_IGN) == SIG_ERR ? -1 : 0);
}

void (*sigset(int sig, void (*disp)(int)))(int) {
	sigset_t omask;
	int blocked;
	struct sigaction oact;

	if ((sig <= 0) || (sig >= NSIG)) {
		errno = EINVAL;
		return (SIG_ERR);
	}
	if (-1 == sigprocmask(0, NULL, &omask))
		return (SIG_ERR);
	blocked = sigismember(&omask, sig);
	if (disp == SIG_HOLD) {
		if (blocked)
			return (SIG_HOLD);
		if ((-1 == sigaction(sig, NULL, &oact)) ||
		    (-1 == sighold(sig)))
			return (SIG_ERR);
		return (sig_t)oact.sa_handler;
	} else {
		if (blocked) {
			if (-1 == sigrelse(sig))
				return (SIG_ERR);
		}
		sig_t rv = signal(sig, disp);
		if (rv != SIG_ERR)
			return blocked ? SIG_HOLD : rv;
		else
			return (rv);
	}
}
#endif /* !BUILDING_VARIANT */
Commit	Line	Data
e9ce8d39 A	1	/*
	2	* Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
734aad71 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. Please obtain a copy of the License at
	10	* http://www.opensource.apple.com/apsl/ and read it before using this
	11	* file.
	12	*
	13	* The Original Code and all software distributed under the License are
	14	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
e9ce8d39 A	15	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
e9ce8d39 A	16	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
734aad71 A	17	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	18	* Please see the License for the specific language governing rights and
	19	* limitations under the License.
e9ce8d39 A	20	*
	21	* @APPLE_LICENSE_HEADER_END@
	22	*/
	23	/*
	24	* Copyright (c) 1989, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	*
	27	* Redistribution and use in source and binary forms, with or without
	28	* modification, are permitted provided that the following conditions
	29	* are met:
	30	* 1. Redistributions of source code must retain the above copyright
	31	* notice, this list of conditions and the following disclaimer.
	32	* 2. Redistributions in binary form must reproduce the above copyright
	33	* notice, this list of conditions and the following disclaimer in the
	34	* documentation and/or other materials provided with the distribution.
	35	* 3. All advertising materials mentioning features or use of this software
	36	* must display the following acknowledgement:
	37	* This product includes software developed by the University of
	38	* California, Berkeley and its contributors.
	39	* 4. Neither the name of the University nor the names of its contributors
	40	* may be used to endorse or promote products derived from this software
	41	* without specific prior written permission.
	42	*
	43	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	44	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	45	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	46	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	47	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	48	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	49	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	50	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	51	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	52	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	53	* SUCH DAMAGE.
	54	*/
	55
224c7076 A	56	#if __DARWIN_UNIX03
	57	#ifdef VARIANT_CANCELABLE
	58	#include <pthread.h>
	59
	60	extern void _pthread_testcancel(pthread_t thread, int isconforming);
	61	#endif /* VARIANT_CANCELABLE */
	62	extern int __unix_conforming;
	63	#endif /* __DARWIN_UNIX03 */
e9ce8d39 A	64
	65	#include <sys/param.h>
	66	#include <signal.h>
5b2abdfb	67	#include <errno.h>
224c7076 A	68
224c7076 A	69	#ifndef BUILDING_VARIANT
9385eb3d A	70	#if defined(__DYNAMIC__)
	71	extern int _sigaction_nobind (int sig, const struct sigaction nsv, struct sigaction osv);
	72	#endif
e9ce8d39	73
59e0d9fe A	74	static int
59e0d9fe A	75	sigvec__(signo, sv, osv, bind)
e9ce8d39 A	76	int signo;
	77	struct sigvec sv, osv;
	78	int bind;
	79	{
	80	int ret;
	81
	82	if (sv)
	83	sv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */
	84	#if defined(__DYNAMIC__)
	85	if (bind) {
	86	#endif
	87	ret = sigaction(signo, (struct sigaction )sv, (struct sigaction )osv);
	88	#if defined(__DYNAMIC__)
	89	} else {
	90	ret = _sigaction_nobind(signo, (struct sigaction )sv, (struct sigaction )osv);
	91	}
	92	#endif
	93	if (ret == 0 && osv)
	94	osv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */
	95	return (ret);
	96	}
	97
59e0d9fe A	98	int
59e0d9fe A	99	sigvec(signo, sv, osv)
e9ce8d39 A	100	int signo;
	101	struct sigvec sv, osv;
	102	{
	103	return sigvec__(signo, sv, osv, 1);
	104	}
	105
	106	#if defined(__DYNAMIC__)
59e0d9fe A	107	int
59e0d9fe A	108	_sigvec_nobind(signo, sv, osv)
e9ce8d39 A	109	int signo;
	110	struct sigvec sv, osv;
	111	{
	112	return sigvec__(signo, sv, osv, 0);
	113	}
	114	#endif
	115
59e0d9fe A	116	int
59e0d9fe A	117	sigsetmask(mask)
e9ce8d39 A	118	int mask;
	119	{
	120	int omask, n;
	121
	122	n = sigprocmask(SIG_SETMASK, (sigset_t ) &mask, (sigset_t ) &omask);
	123	if (n)
	124	return (n);
	125	return (omask);
	126	}
	127
59e0d9fe A	128	int
59e0d9fe A	129	sigblock(mask)
e9ce8d39 A	130	int mask;
	131	{
	132	int omask, n;
	133
	134	n = sigprocmask(SIG_BLOCK, (sigset_t ) &mask, (sigset_t ) &omask);
	135	if (n)
	136	return (n);
	137	return (omask);
	138	}
224c7076 A	139	#endif /* !BUILDING_VARIANT */
	140
	141	#if __DARWIN_UNIX03
	142	int
	143	sigpause(sig)
	144	int sig;
	145	{
	146	sigset_t mask;
	147
	148	if (__unix_conforming == 0)
	149	__unix_conforming = 1;
	150	#ifdef VARIANT_CANCELABLE
	151	_pthread_testcancel(pthread_self(), 1);
	152	#endif /* VARIANT_CANCELABLE */
e9ce8d39	153
224c7076 A	154	if ((sig <= 0) \|\| (sig >= NSIG)) {
	155	errno = EINVAL;
	156	return(-1);
	157	}
	158	if (sigprocmask(SIG_BLOCK, (sigset_t ) 0, (sigset_t ) &mask) < 0) {
	159	return(-1);
	160	}
	161	sigdelset(&mask, sig);
	162	return (sigsuspend(&mask));
	163	}
	164	#else
59e0d9fe A	165	int
59e0d9fe A	166	sigpause(mask)
e9ce8d39 A	167	int mask;
	168	{
	169	return (sigsuspend((sigset_t *)&mask));
	170	}
224c7076	171	#endif /* __DARWIN_UNIX03 */
5b2abdfb	172
224c7076	173	#ifndef BUILDING_VARIANT
59e0d9fe A	174	int
59e0d9fe A	175	sighold(sig)
5b2abdfb A	176	int sig;
	177	{
	178	sigset_t mask;
	179
3d9156a7 A	180	if ((sig <= 0) \|\| (sig >= NSIG)) {
	181	errno = EINVAL;
	182	return(-1);
	183	}
5b2abdfb A	184	sigemptyset(&mask);
	185	sigaddset(&mask, sig);
	186	return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0));
	187	}
59e0d9fe A	188
	189	int
	190	sigrelse(sig)
5b2abdfb A	191	int sig;
	192	{
	193	sigset_t mask;
	194
3d9156a7 A	195	if ((sig <= 0) \|\| (sig >= NSIG)) {
	196	errno = EINVAL;
	197	return(-1);
	198	}
5b2abdfb A	199	sigemptyset(&mask);
	200	sigaddset(&mask, sig);
	201	return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0));
	202	}
	203
59e0d9fe A	204
	205	int
	206	sigignore(sig)
	207	int sig;
	208	{
	209	return (signal(sig, SIG_IGN) == SIG_ERR ? -1 : 0);
	210	}
	211
3d9156a7 A	212	void (sigset(int sig, void (disp)(int)))(int) {
	213	sigset_t omask;
	214	int blocked;
	215	struct sigaction oact;
	216
	217	if ((sig <= 0) \|\| (sig >= NSIG)) {
	218	errno = EINVAL;
	219	return (SIG_ERR);
	220	}
	221	if (-1 == sigprocmask(0, NULL, &omask))
	222	return (SIG_ERR);
	223	blocked = sigismember(&omask, sig);
	224	if (disp == SIG_HOLD) {
	225	if (blocked)
	226	return (SIG_HOLD);
	227	if ((-1 == sigaction(sig, NULL, &oact)) \|\|
	228	(-1 == sighold(sig)))
	229	return (SIG_ERR);
	230	return (sig_t)oact.sa_handler;
	231	} else {
	232	if (blocked) {
	233	if (-1 == sigrelse(sig))
	234	return (SIG_ERR);
	235	}
	236	sig_t rv = signal(sig, disp);
	237	if (rv != SIG_ERR)
	238	return blocked ? SIG_HOLD : rv;
	239	else
	240	return (rv);
	241	}
	242	}
224c7076	243	#endif /* !BUILDING_VARIANT */