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Annotation of coherent/a/usr/man/COHERENT/alarm, revision 1.1.1.1

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                      3: alarm()                COHERENT System Call               alarm()
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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.
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                     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  Time  remaining is superseded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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