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RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD RedHat Solaris Others

[IEEE Std1003.2-1992 (``POSIX.2'')]

SLEEP(1)                   OpenBSD Reference Manual                   SLEEP(1)

     sleep - suspend execution for an interval of time

     sleep seconds

     The sleep utility suspends execution for a minimum of seconds. sleep is
     used to schedule the execution of other commands (see EXAMPLES below).

     The sleep utility exits with one of the following values:

     0     On successful completion, or if the signal SIGALRM was received.

     >0    An error occurred.

     To schedule the execution of a command for x number seconds later:

           (sleep 1800; sh command_file >& errors)&

     This incantation would wait a half hour before running the script com-
     mand_file. (See the at(1) utility.)

     To reiteratively run a command (with csh(1)):

           while (1)
                   if (! -r zzz.rawdata) then
                           sleep 300
                           foreach i (`ls *.rawdata`)
                                   sleep 70
                                   awk -f collapse_data $i >> results

     The scenario for a script such as this might be: a program currently run-
     ning is taking longer than expected to process a series of files, and it
     would be nice to have another program start processing the files created
     by the first program as soon as it is finished (when zzz.rawdata is cre-
     ated).  The script checks every five minutes for the file zzz.rawdata,
     when the file is found, then another portion processing is done courte-
     ously by sleeping for 70 seconds in between each awk(1) job.

     at(1),  setitimer(2),  alarm(3),  sleep(3)

     The sleep command offers a superset of IEEE Std1003.2 (``POSIX.2'') func-

OpenBSD 2.6                     April 18, 1994                               1

Source: OpenBSD 2.6 man pages. Copyright: Portions are copyrighted by BERKELEY
SOFTWARE DESIGN, INC., The Regents of the University of California, Massachusetts
Institute of Technology, Free Software Foundation, FreeBSD Inc., and others.

(Corrections, notes, and links courtesy of RocketAware.com)

[Detailed Topics]
FreeBSD Sources for sleep(1)
OpenBSD sources for sleep(1)

[Overview Topics]

Up to: Real-Time related - time of day, elapsed time, sleeping, waiting for events. time(), gmtime(), localtime(), etc.
Up to: Process Signals and Events - Sending and handling signals and events.
Up to: Current Process Control - control of the currently running process, longjmp, wait, sleep, argument processing

RocketLink!--> Man page versions: OpenBSD FreeBSD NetBSD RedHat Solaris Others

[IEEE Std1003.2-1992 (``POSIX.2'')]

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