| 1 | /* |
| 2 | * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. |
| 3 | * |
| 4 | * @APPLE_LICENSE_HEADER_START@ |
| 5 | * |
| 6 | * The contents of this file constitute Original Code as defined in and |
| 7 | * are subject to the Apple Public Source License Version 1.1 (the |
| 8 | * "License"). You may not use this file except in compliance with the |
| 9 | * License. Please obtain a copy of the License at |
| 10 | * http://www.apple.com/publicsource and read it before using this file. |
| 11 | * |
| 12 | * This Original Code and all software distributed under the License are |
| 13 | * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| 14 | * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, |
| 15 | * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, |
| 16 | * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the |
| 17 | * License for the specific language governing rights and limitations |
| 18 | * under the License. |
| 19 | * |
| 20 | * @APPLE_LICENSE_HEADER_END@ |
| 21 | */ |
| 22 | /* |
| 23 | * Copyright (c) 1989, 1993 |
| 24 | * The Regents of the University of California. All rights reserved. |
| 25 | * |
| 26 | * Redistribution and use in source and binary forms, with or without |
| 27 | * modification, are permitted provided that the following conditions |
| 28 | * are met: |
| 29 | * 1. Redistributions of source code must retain the above copyright |
| 30 | * notice, this list of conditions and the following disclaimer. |
| 31 | * 2. Redistributions in binary form must reproduce the above copyright |
| 32 | * notice, this list of conditions and the following disclaimer in the |
| 33 | * documentation and/or other materials provided with the distribution. |
| 34 | * 3. All advertising materials mentioning features or use of this software |
| 35 | * must display the following acknowledgement: |
| 36 | * This product includes software developed by the University of |
| 37 | * California, Berkeley and its contributors. |
| 38 | * 4. Neither the name of the University nor the names of its contributors |
| 39 | * may be used to endorse or promote products derived from this software |
| 40 | * without specific prior written permission. |
| 41 | * |
| 42 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 43 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 44 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 45 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 46 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 47 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 48 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 49 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 50 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 51 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 52 | * SUCH DAMAGE. |
| 53 | */ |
| 54 | |
| 55 | |
| 56 | #include <sys/param.h> |
| 57 | #include <signal.h> |
| 58 | #include <errno.h> |
| 59 | |
| 60 | static int sigvec__(signo, sv, osv, bind) |
| 61 | int signo; |
| 62 | struct sigvec *sv, *osv; |
| 63 | int bind; |
| 64 | { |
| 65 | int ret; |
| 66 | |
| 67 | if (sv) |
| 68 | sv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */ |
| 69 | #if defined(__DYNAMIC__) |
| 70 | if (bind) { |
| 71 | #endif |
| 72 | ret = sigaction(signo, (struct sigaction *)sv, (struct sigaction *)osv); |
| 73 | #if defined(__DYNAMIC__) |
| 74 | } else { |
| 75 | ret = _sigaction_nobind(signo, (struct sigaction *)sv, (struct sigaction *)osv); |
| 76 | } |
| 77 | #endif |
| 78 | if (ret == 0 && osv) |
| 79 | osv->sv_flags ^= SV_INTERRUPT; /* !SA_INTERRUPT */ |
| 80 | return (ret); |
| 81 | } |
| 82 | |
| 83 | int sigvec(signo, sv, osv) |
| 84 | int signo; |
| 85 | struct sigvec *sv, *osv; |
| 86 | { |
| 87 | return sigvec__(signo, sv, osv, 1); |
| 88 | } |
| 89 | |
| 90 | #if defined(__DYNAMIC__) |
| 91 | int _sigvec_nobind(signo, sv, osv) |
| 92 | int signo; |
| 93 | struct sigvec *sv, *osv; |
| 94 | { |
| 95 | return sigvec__(signo, sv, osv, 0); |
| 96 | } |
| 97 | #endif |
| 98 | |
| 99 | int sigsetmask(mask) |
| 100 | int mask; |
| 101 | { |
| 102 | int omask, n; |
| 103 | |
| 104 | n = sigprocmask(SIG_SETMASK, (sigset_t *) &mask, (sigset_t *) &omask); |
| 105 | if (n) |
| 106 | return (n); |
| 107 | return (omask); |
| 108 | } |
| 109 | |
| 110 | int sigblock(mask) |
| 111 | int mask; |
| 112 | { |
| 113 | int omask, n; |
| 114 | |
| 115 | n = sigprocmask(SIG_BLOCK, (sigset_t *) &mask, (sigset_t *) &omask); |
| 116 | if (n) |
| 117 | return (n); |
| 118 | return (omask); |
| 119 | } |
| 120 | |
| 121 | int sigpause(mask) |
| 122 | int mask; |
| 123 | { |
| 124 | return (sigsuspend((sigset_t *)&mask)); |
| 125 | } |
| 126 | |
| 127 | int sighold(sig) |
| 128 | int sig; |
| 129 | { |
| 130 | sigset_t mask; |
| 131 | |
| 132 | if ((sig < 0) || (sig > NSIG)) |
| 133 | return(EINVAL); |
| 134 | sigemptyset(&mask); |
| 135 | sigaddset(&mask, sig); |
| 136 | return(sigprocmask(SIG_BLOCK, &mask,(sigset_t *)0)); |
| 137 | } |
| 138 | int sigrelse(sig) |
| 139 | int sig; |
| 140 | { |
| 141 | sigset_t mask; |
| 142 | |
| 143 | if ((sig < 0) || (sig > NSIG)) |
| 144 | return(EINVAL); |
| 145 | sigemptyset(&mask); |
| 146 | sigaddset(&mask, sig); |
| 147 | return(sigprocmask(SIG_UNBLOCK, &mask,(sigset_t *)0)); |
| 148 | } |
| 149 | |