projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b8f253e8 | 1 | /* |
| 8a376f64 | 2 | * Copyright (c) 1985, 1989 Regents of the University of California. |
| 0aaa35b3 KB |
3 | * All rights reserved. |
| 4 | * | |
| c0567266 KB |
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. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| b8f253e8 KM |
32 | */ |
| 33 | ||
| 2ce81398 | 34 | #if defined(LIBC_SCCS) && !defined(lint) |
| 1c15e888 | 35 | static char sccsid[] = "@(#)signal.c 5.5 (Berkeley) 6/1/90"; |
| 0aaa35b3 | 36 | #endif /* LIBC_SCCS and not lint */ |
| 3a2dc6bc | 37 | |
| ddc47039 RC |
38 | /* |
| 39 | * Almost backwards compatible signal. | |
| ddc47039 | 40 | */ |
| 3a2dc6bc KM |
41 | #include <signal.h> |
| 42 | ||
| 8a376f64 MK |
43 | sigset_t _sigintr; /* shared with siginterrupt */ |
| 44 | ||
| 45 | sig_t | |
| 46 | signal(s, a) | |
| 47 | int s; | |
| 48 | sig_t a; | |
| 3a2dc6bc | 49 | { |
| 8a376f64 | 50 | struct sigaction sa, osa; |
| ddc47039 | 51 | |
| 8a376f64 MK |
52 | sa.sa_handler = a; |
| 53 | sigemptyset(&sa.sa_mask); | |
| 54 | sa.sa_flags = 0; | |
| 55 | if (!sigismember(&_sigintr, s)) | |
| 56 | sa.sa_flags |= SA_RESTART; | |
| 57 | if (sigaction(s, &sa, &osa) < 0) | |
| 3a2dc6bc | 58 | return (BADSIG); |
| 8a376f64 | 59 | return (osa.sa_handler); |
| 3a2dc6bc | 60 | } |