projects / apple / libc.git / blame
| Commit | Line | Data |
|---|---|---|
| e9ce8d39 | 1 | /* |
| 9385eb3d | 2 | * Copyright (c) 1985, 1989, 1993 |
| e9ce8d39 A |
3 | * The Regents of the University of California. All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| e9ce8d39 A |
13 | * 4. Neither the name of the University nor the names of its contributors |
| 14 | * may be used to endorse or promote products derived from this software | |
| 15 | * without specific prior written permission. | |
| 16 | * | |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 27 | * SUCH DAMAGE. | |
| 28 | */ | |
| 29 | ||
| 5b2abdfb | 30 | #if defined(LIBC_SCCS) && !defined(lint) |
| 9385eb3d | 31 | static char sccsid[] = "@(#)signal.c 8.1 (Berkeley) 6/4/93"; |
| 5b2abdfb | 32 | #endif /* LIBC_SCCS and not lint */ |
| 9385eb3d | 33 | #include <sys/cdefs.h> |
| 1f2f436a | 34 | __FBSDID("$FreeBSD: src/lib/libc/gen/signal.c,v 1.4 2007/01/09 00:27:55 imp Exp $"); |
| e9ce8d39 A |
35 | |
| 36 | /* | |
| 9385eb3d | 37 | * Almost backwards compatible signal. |
| e9ce8d39 | 38 | */ |
| 9385eb3d A |
39 | #include "namespace.h" |
| 40 | #include <signal.h> | |
| 41 | #include "un-namespace.h" | |
| 42 | #include "libc_private.h" | |
| 43 | ||
| 44 | sigset_t _sigintr; /* shared with siginterrupt */ | |
| 45 | ||
| ad3c9f2a A |
46 | extern int _sigaction_nobind (int sig, const struct sigaction *nsv, struct sigaction *osv); |
| 47 | ||
| 48 | static sig_t | |
| 49 | signal__(s, a, bind) | |
| 9385eb3d A |
50 | int s; |
| 51 | sig_t a; | |
| ad3c9f2a | 52 | int bind; |
| e9ce8d39 | 53 | { |
| 9385eb3d | 54 | struct sigaction sa, osa; |
| e9ce8d39 | 55 | |
| 9385eb3d A |
56 | sa.sa_handler = a; |
| 57 | sigemptyset(&sa.sa_mask); | |
| 58 | sa.sa_flags = 0; | |
| 59 | if (!sigismember(&_sigintr, s)) | |
| 60 | sa.sa_flags |= SA_RESTART; | |
| ad3c9f2a A |
61 | #if defined(__DYNAMIC__) |
| 62 | if (bind) { | |
| 63 | #endif /* __DYNAMIC__ */ | |
| 9385eb3d A |
64 | if (_sigaction(s, &sa, &osa) < 0) |
| 65 | return (SIG_ERR); | |
| ad3c9f2a A |
66 | #if defined(__DYNAMIC__) |
| 67 | } else { | |
| 68 | if (_sigaction_nobind(s, &sa, &osa) < 0) | |
| 69 | return (SIG_ERR); | |
| 70 | } | |
| 71 | #endif /* __DYNAMIC__ */ | |
| 9385eb3d | 72 | return (osa.sa_handler); |
| e9ce8d39 | 73 | } |
| ad3c9f2a A |
74 | |
| 75 | sig_t | |
| 76 | signal(s, a) | |
| 77 | int s; | |
| 78 | sig_t a; | |
| 79 | { | |
| 80 | return signal__(s, a, 1); | |
| 81 | } | |
| 82 | ||
| 83 | #if defined(__DYNAMIC__) | |
| 84 | sig_t | |
| 85 | _signal_nobind(s, a) | |
| 86 | int s; | |
| 87 | sig_t a; | |
| 88 | { | |
| 89 | return signal__(s, a, 0); | |
| 90 | } | |
| 91 | #endif /* __DYNAMIC__ */ |