Semaphors Problem

[John Love-Jensen]

Hi Manal,

> then I get this in the run time: The call was interrupted by a signal handler.

It sounds like your signal handler is violating the very limited constraints
of what a signal handler can do.

Take a look at your sigaction constraints in your "man sigaction".  That
lists which functions can be called from within a signal handler.  My bet is
that the signal handler is using routines (directly or indirectly) not in
that list.

I strongly recommend that the signal handler be written in such a way as to
minimize the signal interruption.  For my own, I usually just set a flag and
return, and then act upon that flag in the main code at an appropriate time.

HTH,
--Eljay