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Using and Porting GNU Fortran

8.11.9.10 Alarm Intrinsic

CALL Alarm(Seconds, Handler, Status)

Seconds: INTEGER; scalar; INTENT(IN).

Handler: Signal handler (INTEGER FUNCTION or SUBROUTINE) or dummy/global INTEGER(KIND=1) scalar.

Status: INTEGER(KIND=1); OPTIONAL; scalar; INTENT(OUT).

Intrinsic groups: unix.

Description:

Causes external subroutine Handler to be executed after a delay of Seconds seconds by using alarm(1) to set up a signal and signal(2) to catch it. If Status is supplied, it will be returned with the number of seconds remaining until any previously scheduled alarm was due to be delivered, or zero if there was no previously scheduled alarm. See section 8.11.9.228 Signal Intrinsic (subroutine).