Defect in XSH sigaction

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        Defect report from : Steven Valentine , Hewlett-Packard Company

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@ page 1363 line 42554 section sigaction objection {HPUXESTLSMV200601}

Problem:

Edition of Specification (Year): 2004

Defect code :  3. Clarification required

The restart behavior of interruptible functions which use a timeout 
(such as nanosleep and pselect) is not described in sufficient 
detail when SA_RESTART is in effect.  The duration of the timeout 
following the restart varies greatly among implementations.  

For example, if a 600ms nanosleep call is interrupted by a signal after 200ms, 
and SA_RESTART was used, the observed possibilities on restart are:

1) Do not restart the function, return EINTR immediately.
2) Restart the timeout using the remaining time interval (400ms).
3) Restart the timeout using the original full time interval (600ms).


Action:

Applications should not depend on any particular behavior in this situation. 

To make this clear, insert a new sentence before the sentence which starts with 
"If the flag is not set...":

If an interruptible function which uses a timeout is restarted, the
the behavior and duration of the timeout following the restart is
undefined.