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Process exit status on different platforms

From: Lennart Borgman
Subject: Process exit status on different platforms
Date: Thu, 7 Jan 2010 09:34:40 +0100

Are there any variable that could be used to check if call-process
exited with success status?

Is not this return value platform dependent?

BTW a small manual bug on page (info "(elisp) Synchronous Processes"):

 -- Function: call-process program &optional infile destination display
          &rest args
     This function calls PROGRAM in a separate process and waits for it
     to finish.

This is wrong since it does not wait if destination is 0.

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