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/* $OpenBSD: signal.c,v 1.10 2015/10/25 04:13:59 guenther Exp $ */ |
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/* |
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* Copyright (c) 1985, 1989, 1993 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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/* |
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* Almost backwards compatible signal. |
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*/ |
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#include <signal.h> |
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#include <string.h> |
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sigset_t __sigintr; /* shared with siginterrupt */ |
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sig_t |
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signal(int s, sig_t a) |
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{ |
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struct sigaction sa, osa; |
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memset(&sa, 0, sizeof sa); |
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sa.sa_handler = a; |
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sigemptyset(&sa.sa_mask); |
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sa.sa_flags = 0; |
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✓✗ |
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if (!sigismember(&__sigintr, s)) |
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sa.sa_flags |= SA_RESTART; |
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✗✓ |
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if (WRAP(sigaction)(s, &sa, &osa) < 0) |
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return (SIG_ERR); |
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return (osa.sa_handler); |
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} |
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__weak_alias(bsd_signal, signal); |