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      1 /*	$OpenBSD: sigaction.c,v 1.4 2001/01/22 18:01:48 millert Exp $	*/
      2 
      3 /****************************************************************************
      4  * Copyright (c) 1998,2000 Free Software Foundation, Inc.                   *
      5  *                                                                          *
      6  * Permission is hereby granted, free of charge, to any person obtaining a  *
      7  * copy of this software and associated documentation files (the            *
      8  * "Software"), to deal in the Software without restriction, including      *
      9  * without limitation the rights to use, copy, modify, merge, publish,      *
     10  * distribute, distribute with modifications, sublicense, and/or sell       *
     11  * copies of the Software, and to permit persons to whom the Software is    *
     12  * furnished to do so, subject to the following conditions:                 *
     13  *                                                                          *
     14  * The above copyright notice and this permission notice shall be included  *
     15  * in all copies or substantial portions of the Software.                   *
     16  *                                                                          *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS  *
     18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               *
     19  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.   *
     20  * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,   *
     21  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR    *
     22  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR    *
     23  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
     24  *                                                                          *
     25  * Except as contained in this notice, the name(s) of the above copyright   *
     26  * holders shall not be used in advertising or otherwise to promote the     *
     27  * sale, use or other dealings in this Software without prior written       *
     28  * authorization.                                                           *
     29  ****************************************************************************/
     30 
     31 /****************************************************************************
     32  *  Author: Zeyd M. Ben-Halim <zmbenhal (at) netcom.com> 1992,1995               *
     33  *     and: Eric S. Raymond <esr (at) snark.thyrsus.com>                         *
     34  ****************************************************************************/
     35 
     36 /* OPENBSD ORIGINAL: lib/libcurses/base/sigaction.c */
     37 
     38 #include "includes.h"
     39 #include <errno.h>
     40 #include <signal.h>
     41 #include "sigact.h"
     42 
     43 /* This file provides sigaction() emulation using sigvec() */
     44 /* Use only if this is non POSIX system */
     45 
     46 #if !HAVE_SIGACTION && HAVE_SIGVEC
     47 
     48 int
     49 sigaction(int sig, struct sigaction *sigact, struct sigaction *osigact)
     50 {
     51 	return sigvec(sig, sigact ? &sigact->sv : NULL,
     52 	    osigact ? &osigact->sv : NULL);
     53 }
     54 
     55 int
     56 sigemptyset (sigset_t *mask)
     57 {
     58 	if (!mask) {
     59 		errno = EINVAL;
     60 		return -1;
     61 	}
     62 	*mask = 0;
     63 	return 0;
     64 }
     65 
     66 int
     67 sigprocmask (int mode, sigset_t *mask, sigset_t *omask)
     68 {
     69 	sigset_t current = sigsetmask(0);
     70 
     71 	if (!mask) {
     72 		errno = EINVAL;
     73 		return -1;
     74 	}
     75 
     76 	if (omask)
     77 		*omask = current;
     78 
     79 	if (mode == SIG_BLOCK)
     80 		current |= *mask;
     81 	else if (mode == SIG_UNBLOCK)
     82 		current &= ~*mask;
     83 	else if (mode == SIG_SETMASK)
     84 	current = *mask;
     85 
     86 	sigsetmask(current);
     87 	return 0;
     88 }
     89 
     90 int
     91 sigsuspend (sigset_t *mask)
     92 {
     93 	if (!mask) {
     94 		errno = EINVAL;
     95 		return -1;
     96 	}
     97 	return sigpause(*mask);
     98 }
     99 
    100 int
    101 sigdelset (sigset_t *mask, int sig)
    102 {
    103 	if (!mask) {
    104 		errno = EINVAL;
    105 		return -1;
    106 	}
    107 	*mask &= ~sigmask(sig);
    108 	return 0;
    109 }
    110 
    111 int
    112 sigaddset (sigset_t *mask, int sig)
    113 {
    114 	if (!mask) {
    115 		errno = EINVAL;
    116 		return -1;
    117 	}
    118 	*mask |= sigmask(sig);
    119 	return 0;
    120 }
    121 
    122 int
    123 sigismember (sigset_t *mask, int sig)
    124 {
    125 	if (!mask) {
    126 		errno = EINVAL;
    127 		return -1;
    128 	}
    129 	return (*mask & sigmask(sig)) != 0;
    130 }
    131 
    132 #endif
    133