ALARM
Section: C Library Functions (3)
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BSD mandoc
BSD 4
NAME
alarm
- set signal timer alarm
SYNOPSIS
Fd #include <unistd.h>
Ft u_int
Fn alarm u_int seconds
DESCRIPTION
Bf -symbolic
This interface is made obsolete by setitimer(2).
Ef
The
Fn alarm
function
waits a count of
seconds
before asserting the terminating signal
SIGALRM
When the signal has successfully been caught,
Fn alarm
returns the amount of time left on the clock.
The maximum mumber of
seconds
allowed
is 2147483647.
If an alarm has been set with
Fn alarm ,
another call to
Fn alarm
will superceed the prior call.
The request
Fn alarm 0
voids the current
alarm.
SEE ALSO
sigaction(2),
setitimer(2),
sigpause(2),
sigvec(2),
signal(3),
sleep(3),
ualarm(3),
usleep(3)
HISTORY
An
Fn alarm
function appeared in
AT&T System
v7 .
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- SEE ALSO
-
- HISTORY
-
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Time: 06:42:31 GMT, May 19, 2025