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Annotation of 43BSDReno/lib/libc/gen/alarm.3, revision 1.1.1.1

1.1       root        1: .\" Copyright (c) 1980 Regents of the University of California.
                      2: .\" All rights reserved.  The Berkeley software License Agreement
                      3: .\" specifies the terms and conditions for redistribution.
                      4: .\"
                      5: .\"    @(#)alarm.3     6.3 (Berkeley) 5/27/86
                      6: .\"
                      7: .TH ALARM 3C  "May 27, 1986"
                      8: .UC 4
                      9: .SH NAME
                     10: alarm \- schedule signal after specified time
                     11: .SH SYNOPSIS
                     12: .nf
                     13: .B alarm(seconds)
                     14: .B unsigned seconds;
                     15: .fi
                     16: .SH DESCRIPTION
                     17: .ft B
                     18: This interface is made obsolete by setitimer(2).
                     19: .ft R
                     20: .PP
                     21: .I Alarm
                     22: causes signal SIGALRM, see
                     23: .IR sigvec (2),
                     24: to be sent to the invoking process
                     25: in a number of seconds given by the argument.
                     26: Unless caught or ignored, the signal terminates the process.
                     27: .PP
                     28: Alarm requests are not stacked; successive calls reset the alarm clock.
                     29: If the argument is 0, any alarm request is canceled.
                     30: Because of scheduling delays,
                     31: resumption of execution of when the signal is
                     32: caught may be delayed an arbitrary amount.
                     33: The longest specifiable delay time is 2147483647 seconds.
                     34: .PP
                     35: The return value is the amount of time previously remaining in the alarm clock.
                     36: .SH "SEE ALSO"
                     37: sigpause(2), sigvec(2), signal(3C), sleep(3), ualarm(3), usleep(3)

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