[apple/libc.git] / gen / FreeBSD / signal.c

/*
 * Copyright (c) 1985, 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.
 * 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.
 */

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wstrict-prototypes"

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)signal.c	8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/lib/libc/gen/signal.c,v 1.4 2007/01/09 00:27:55 imp Exp $");

/*
 * Almost backwards compatible signal.
 */
#include "namespace.h"
#include <signal.h>
#include "un-namespace.h"
#include "libc_private.h"

sigset_t _sigintr;		/* shared with siginterrupt */

extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv);

static sig_t
signal__(s, a, bind)
	int s;
	sig_t a;
	int bind;
{
	struct sigaction sa, osa;

	sa.sa_handler = a;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = 0;
	if (!sigismember(&_sigintr, s))
		sa.sa_flags |= SA_RESTART;
#if defined(__DYNAMIC__)
	if (bind) {
#endif /* __DYNAMIC__ */
	if (_sigaction(s, &sa, &osa) < 0)
		return (SIG_ERR);
#if defined(__DYNAMIC__)
	} else {
	    if (_sigaction_nobind(s, &sa, &osa) < 0)
		return (SIG_ERR);
	}
#endif /* __DYNAMIC__ */
	return (osa.sa_handler);
}

sig_t
signal(s, a)
        int s;
        sig_t a;
{
    return signal__(s, a, 1);
}

#if defined(__DYNAMIC__)
sig_t
_signal_nobind(s, a)
        int s;
        sig_t a;
{
    return signal__(s, a, 0);
}
#endif /* __DYNAMIC__ */
#pragma clang diagnostic pop
Commit	Line	Data
e9ce8d39	1	/*
9385eb3d	2	* Copyright (c) 1985, 1989, 1993
e9ce8d39 A	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
e9ce8d39 A	13	* 4. Neither the name of the University nor the names of its contributors
	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*/
	29
70ad1dc8 A	30	#pragma clang diagnostic push
	31	#pragma clang diagnostic ignored "-Wstrict-prototypes"
	32
5b2abdfb	33	#if defined(LIBC_SCCS) && !defined(lint)
9385eb3d	34	static char sccsid[] = "@(#)signal.c 8.1 (Berkeley) 6/4/93";
5b2abdfb	35	#endif /* LIBC_SCCS and not lint */
9385eb3d	36	#include <sys/cdefs.h>
1f2f436a	37	__FBSDID("$FreeBSD: src/lib/libc/gen/signal.c,v 1.4 2007/01/09 00:27:55 imp Exp $");
e9ce8d39 A	38
e9ce8d39 A	39	/*
9385eb3d	40	* Almost backwards compatible signal.
e9ce8d39	41	*/
9385eb3d A	42	#include "namespace.h"
	43	#include <signal.h>
	44	#include "un-namespace.h"
	45	#include "libc_private.h"
	46
	47	sigset_t _sigintr; /* shared with siginterrupt */
	48
ad3c9f2a A	49	extern int _sigaction_nobind (int sig, const struct sigaction nsv, struct sigaction osv);
	50
	51	static sig_t
	52	signal__(s, a, bind)
9385eb3d A	53	int s;
9385eb3d A	54	sig_t a;
ad3c9f2a	55	int bind;
e9ce8d39	56	{
9385eb3d	57	struct sigaction sa, osa;
e9ce8d39	58
9385eb3d A	59	sa.sa_handler = a;
	60	sigemptyset(&sa.sa_mask);
	61	sa.sa_flags = 0;
	62	if (!sigismember(&_sigintr, s))
	63	sa.sa_flags \|= SA_RESTART;
ad3c9f2a A	64	#if defined(__DYNAMIC__)
	65	if (bind) {
	66	#endif /* __DYNAMIC__ */
9385eb3d A	67	if (_sigaction(s, &sa, &osa) < 0)
9385eb3d A	68	return (SIG_ERR);
ad3c9f2a A	69	#if defined(__DYNAMIC__)
	70	} else {
	71	if (_sigaction_nobind(s, &sa, &osa) < 0)
	72	return (SIG_ERR);
	73	}
	74	#endif /* __DYNAMIC__ */
9385eb3d	75	return (osa.sa_handler);
e9ce8d39	76	}
ad3c9f2a A	77
	78	sig_t
	79	signal(s, a)
	80	int s;
	81	sig_t a;
	82	{
	83	return signal__(s, a, 1);
	84	}
	85
	86	#if defined(__DYNAMIC__)
	87	sig_t
	88	_signal_nobind(s, a)
	89	int s;
	90	sig_t a;
	91	{
	92	return signal__(s, a, 0);
	93	}
	94	#endif /* __DYNAMIC__ */
70ad1dc8	95	#pragma clang diagnostic pop