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RedHat 9 (Linux i386) - man page for alarm (redhat section 2)

ALARM(2)			    Linux Programmer's Manual				 ALARM(2)

NAME
       alarm - set an alarm clock for delivery of a signal

SYNOPSIS
       #include <unistd.h>

       unsigned int alarm(unsigned int seconds);

DESCRIPTION
       alarm arranges for a SIGALRM signal to be delivered to the process in seconds seconds.

       If seconds is zero, no new alarm is scheduled.

       In any event any previously set alarm is cancelled.

RETURN VALUE
       alarm returns the number of seconds remaining until any previously scheduled alarm was due
       to be delivered, or zero if there was no previously scheduled alarm.

NOTES
       alarm and setitimer share the same timer; calls to one will  interfere  with  use  of  the
       other.

       sleep()	may  be  implemented  using SIGALRM; mixing calls to alarm() and sleep() is a bad
       idea.

       Scheduling delays can, as ever, cause the execution of the process to  be  delayed  by  an
       arbitrary amount of time.

CONFORMING TO
       SVr4, SVID, POSIX, X/OPEN, BSD 4.3

SEE ALSO
       setitimer(2), signal(2), sigaction(2), gettimeofday(2), select(2), pause(2), sleep(3)

Linux					    1993-07-21					 ALARM(2)


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