projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 97eb2f19 KM |
1 | .\" Copyright (c) 1983 Regents of the University of California. |
| 2 | .\" All rights reserved. The Berkeley software License Agreement | |
| 3 | .\" specifies the terms and conditions for redistribution. | |
| 4 | .\" | |
| 3db7620f | 5 | .\" @(#)alarm.3 6.1 (Berkeley) %G% |
| 97eb2f19 | 6 | .\" |
| 3db7620f | 7 | .TH ALARM 3F "" |
| 97eb2f19 KM |
8 | .UC 5 |
| 9 | .SH NAME | |
| 10 | alarm \- execute a subroutine after a specified time | |
| 11 | .SH SYNOPSIS | |
| 12 | .B integer function alarm (time, proc) | |
| 13 | .br | |
| 14 | .B integer time | |
| 15 | .br | |
| 16 | .B external proc | |
| 17 | .SH DESCRIPTION | |
| 18 | This routine arranges for subroutine | |
| 19 | .I proc | |
| 20 | to be called after | |
| 21 | .I time | |
| 22 | seconds. If | |
| 23 | .I time | |
| 24 | is ``0'', the alarm is turned off and no routine will be called. | |
| 25 | The returned value will be the time remaining on the last alarm. | |
| 26 | .SH FILES | |
| 27 | .ie \nM /usr/ucb/lib/libU77.a | |
| 28 | .el /usr/lib/libU77.a | |
| 29 | .SH "SEE ALSO" | |
| 30 | alarm(3C), sleep(3F), signal(3F) | |
| 31 | .SH BUGS | |
| 32 | .I Alarm | |
| 33 | and | |
| 34 | .I sleep | |
| 35 | interact. If | |
| 36 | .I sleep | |
| 37 | is called after | |
| 38 | .IR alarm , | |
| 39 | the | |
| 40 | .I alarm | |
| 41 | process will never be called. SIGALRM will occur at the lesser of the | |
| 42 | remaining | |
| 43 | .I alarm | |
| 44 | time or the | |
| 45 | .I sleep | |
| 46 | time. |