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Annotation of coherent/a/usr/man/COHERENT/alarm, revision 1.1

1.1     ! root        1: 
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        !             3: alarm()                COHERENT System Call               alarm()
        !             4: 
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        !             7: 
        !             8: Set a timer
        !             9: 
        !            10: aallaarrmm(_n)
        !            11: uunnssiiggnneedd _n;
        !            12: 
        !            13: alarm sets  a timer associated with the  requesting process to go
        !            14: off in  n seconds.  After n seconds, the  system sends the signal
        !            15: SIGALRM to the process.  An  argument of zero turns off the alarm
        !            16: timer.
        !            17: 
        !            18: By  default, the  receipt of  the  SIGALRM signal  terminates the
        !            19: process.  However,  it may be caught or  ignored by using signal.
        !            20: Because of  scheduling variation and the  one second granularity,
        !            21: the action of alarm is predictable only to within one second.
        !            22: 
        !            23: alarm is  useful for such  things as timeouts.   For example, the
        !            24: login process  on a dial-in port  might hang up the  line after a
        !            25: sufficient time has elapsed with no user response.
        !            26: 
        !            27: alarm returns the previous alarm value, which represents the time
        !            28: remaining from  the previous call.  Time  remaining is superseded
        !            29: by the new alarm value.
        !            30: 
        !            31: ***** See Also *****
        !            32: 
        !            33: COHERENT system calls, signal(), sleep()
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        !            64: COHERENT Lexicon                                           Page 1
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