[unix-history] / usr / src / lib / libc / gen / siginterrupt.c

/*
 * Copyright (c) 1988 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 */

#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)siginterrupt.c	5.3 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */

#include <signal.h>

/*
 * Set signal state to prevent restart of system calls
 * after an instance of the indicated signal.
 */
siginterrupt(sig, flag)
	int sig, flag;
{
	struct sigvec sv;
	int ret;

	if ((ret = sigvec(sig, (struct sigvec *)0, &sv)) < 0)
		return (ret);
	if (flag)
		sv.sv_flags |= SV_INTERRUPT;
	else
		sv.sv_flags &= ~SV_INTERRUPT;
	return (sigvec(sig, &sv, (struct sigvec *)0));
}
Commit	Line	Data
b8f253e8	1	/*
84cb68a1 KB	2	* Copyright (c) 1988 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms are permitted
	6	* provided that the above copyright notice and this paragraph are
	7	* duplicated in all such forms and that any documentation,
	8	* advertising materials, and other materials related to such
	9	* distribution and use acknowledge that the software was developed
	10	* by the University of California, Berkeley. The name of the
	11	* University may not be used to endorse or promote products derived
	12	* from this software without specific prior written permission.
	13	* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
	15	* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
b8f253e8 KM	16	*/
b8f253e8 KM	17
2ce81398	18	#if defined(LIBC_SCCS) && !defined(lint)
84cb68a1 KB	19	static char sccsid[] = "@(#)siginterrupt.c 5.3 (Berkeley) %G%";
84cb68a1 KB	20	#endif /* LIBC_SCCS and not lint */
6fa13af1 KM	21
	22	#include <signal.h>
	23
	24	/*
	25	* Set signal state to prevent restart of system calls
	26	* after an instance of the indicated signal.
	27	*/
	28	siginterrupt(sig, flag)
	29	int sig, flag;
	30	{
	31	struct sigvec sv;
	32	int ret;
	33
84cb68a1	34	if ((ret = sigvec(sig, (struct sigvec *)0, &sv)) < 0)
6fa13af1 KM	35	return (ret);
	36	if (flag)
	37	sv.sv_flags \|= SV_INTERRUPT;
	38	else
	39	sv.sv_flags &= ~SV_INTERRUPT;
84cb68a1	40	return (sigvec(sig, &sv, (struct sigvec *)0));
6fa13af1	41	}