projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b8f253e8 KM |
1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California. | |
| d0286ffa KB |
3 | * All rights reserved. |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms are permitted | |
| 6 | * provided that the above copyright notice and this paragraph are | |
| 7 | * duplicated in all such forms and that any documentation, | |
| 8 | * advertising materials, and other materials related to such | |
| 9 | * distribution and use acknowledge that the software was developed | |
| 10 | * by the University of California, Berkeley. The name of the | |
| 11 | * University may not be used to endorse or promote products derived | |
| 12 | * from this software without specific prior written permission. | |
| 13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
| 14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
| 15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| b8f253e8 KM |
16 | */ |
| 17 | ||
| 2ce81398 | 18 | #if defined(LIBC_SCCS) && !defined(lint) |
| d0286ffa KB |
19 | static char sccsid[] = "@(#)alarm.c 5.3 (Berkeley) %G%"; |
| 20 | #endif /* LIBC_SCCS and not lint */ | |
| 30e720bf SL |
21 | |
| 22 | /* | |
| 23 | * Backwards compatible alarm. | |
| 24 | */ | |
| 25 | #include <sys/time.h> | |
| 26 | ||
| 27 | alarm(secs) | |
| 28 | int secs; | |
| 29 | { | |
| 30 | struct itimerval it, oitv; | |
| 31 | register struct itimerval *itp = ⁢ | |
| 32 | ||
| 33 | timerclear(&itp->it_interval); | |
| 34 | itp->it_value.tv_sec = secs; | |
| 35 | itp->it_value.tv_usec = 0; | |
| 36 | if (setitimer(ITIMER_REAL, itp, &oitv) < 0) | |
| 37 | return (-1); | |
| 27130bed RC |
38 | if (oitv.it_value.tv_usec) |
| 39 | oitv.it_value.tv_sec++; | |
| 30e720bf SL |
40 | return (oitv.it_value.tv_sec); |
| 41 | } |