usr/src/lib/libbc/libc/gen/common/posix_sig.c

   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 /*
  23  * Copyright 1994 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #pragma ident   "%Z%%M% %I%     %E% SMI"
  28
  29 /*
  30  * posix signal package
  31  */
  32 #include <stdio.h>
  33 #include <signal.h>
  34 #include <errno.h>
  35
  36 #define cantmask        (sigmask(SIGKILL)|sigmask(SIGSTOP))
  37
  38
  39 /*
  40  * sigemptyset - all known signals
  41  */
  42 int
  43 sigemptyset(sigset_t *sigp)
  44 {
  45         if (!sigp) {
  46                 errno = EINVAL;
  47                 return (-1);
  48         }
  49         *sigp = 0;
  50         return (0);
  51 }
  52
  53 /*
  54  * sigfillset - all known signals
  55  */
  56 int
  57 sigfillset(sigset_t *sigp)
  58 {
  59         if (!sigp) {
  60                 errno = EINVAL;
  61                 return (-1);
  62         }
  63         *sigp = sigmask(NSIG - 1) | (sigmask(NSIG - 1) - 1);
  64         return (0);
  65 }
  66
  67 /*
  68  * add the signal to the set
  69  */
  70 int
  71 sigaddset(sigset_t *sigp, int signo)
  72 {
  73         if (!sigp  ||  signo <= 0  ||  signo >= NSIG) {
  74                 errno = EINVAL;
  75                 return (-1);
  76         }
  77         *sigp |= sigmask(signo);
  78         return (0);
  79 }
  80
  81 /*
  82  * remove the signal from the set
  83  */
  84 int
  85 sigdelset(sigset_t *sigp, int signo)
  86 {
  87         if (!sigp  ||  signo <= 0  ||  signo >= NSIG) {
  88                 errno = EINVAL;
  89                 return (-1);
  90         }
  91         *sigp &= ~sigmask(signo);
  92         return (0);
  93 }
  94
  95 /*
  96  * return true if the signal is in the set (return is 0 or 1)
  97  */
  98 int
  99 sigismember(sigset_t *sigp, int signo)
 100 {
 101         if (!sigp  ||  signo <= 0  ||  signo >= NSIG) {
 102                 errno = EINVAL;
 103                 return (-1);
 104         }
 105         return ((*sigp & sigmask(signo)) != 0);
 106 }