Annotation of src/lib/libc/gen/signal.c, Revision 1.9
1.9 ! jtc 1: /* $NetBSD: signal.c,v 1.8 1997/07/13 19:46:17 christos Exp $ */
1.6 cgd 2:
1.1 cgd 3: /*
1.6 cgd 4: * Copyright (c) 1985, 1989, 1993
5: * The Regents of the University of California. All rights reserved.
1.1 cgd 6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
1.8 christos 36: #include <sys/cdefs.h>
1.1 cgd 37: #if defined(LIBC_SCCS) && !defined(lint)
1.6 cgd 38: #if 0
39: static char sccsid[] = "@(#)signal.c 8.1 (Berkeley) 6/4/93";
40: #else
1.9 ! jtc 41: __RCSID("$NetBSD: signal.c,v 1.8 1997/07/13 19:46:17 christos Exp $");
1.6 cgd 42: #endif
1.1 cgd 43: #endif /* LIBC_SCCS and not lint */
44:
45: /*
46: * Almost backwards compatible signal.
47: */
1.9 ! jtc 48: #include "namespace.h"
1.1 cgd 49: #include <signal.h>
50:
1.5 jtc 51: sigset_t __sigintr; /* shared with siginterrupt */
1.1 cgd 52:
53: sig_t
54: signal(s, a)
55: int s;
56: sig_t a;
57: {
58: struct sigaction sa, osa;
59:
60: sa.sa_handler = a;
61: sigemptyset(&sa.sa_mask);
62: sa.sa_flags = 0;
1.5 jtc 63: if (!sigismember(&__sigintr, s))
1.1 cgd 64: sa.sa_flags |= SA_RESTART;
65: if (sigaction(s, &sa, &osa) < 0)
1.2 jtc 66: return (SIG_ERR);
1.1 cgd 67: return (osa.sa_handler);
68: }
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