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Date: Fri, 01 Oct 2004 22:02:43 +0200
From: "Eli Zaretskii" <eliz AT gnu DOT org>
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To: djgpp AT delorie DOT com
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In-reply-to: <7b8rl0hfv6q3g3hq6i5uclvha49ta50hil@4ax.com> (message from Brian
	Inglis on Fri, 01 Oct 2004 18:29:00 GMT)
Subject: Re: system() return value if no program present
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> From: Brian Inglis <Brian DOT Inglis AT SystematicSW DOT Invalid>
> Date: Fri, 01 Oct 2004 18:29:00 GMT
> 
> SHELL is expected to name a Unix like shell, COMSPEC is expected to
> name a DOS like shell

Actually, the DJGPP implementation of `system' treats the values of
SHELL and COMSPEC exactly the same.  It first tries to get the shell
from SHELL, and if that fails, tries COMSPEC, but that's the only
difference between the two; the rest of processing doesn't remember
whether the shell's file name came from SHELL or from COMSPEC.