Re: [1003.1(2008)/Issue 7 0000247]: Add nullglob (null globbing) support to shell's "set" and glob()

Subject: Re: [1003.1(2008)/Issue 7 0000247]: Add nullglob (null globbing) support to shell's "set" and glob()
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> Many shells have a way of doing this, but there is no *standard* way to do
> it.  Doing this in a shell is often called "null globbing"
> Null globbing fixes this by replacing an unmatched pattern with nothing at
> all. In bash you can enable nullglob with "shopt -s nullglob". In zsh, you
> can use "setopt NULL_GLOB" for the same result. Then, "for" loops on glob
> patterns will work correctly if nothing matches the glob pattern.
> 

In ksh93, you can do this on a per pattern basis with ~(N) in front of the
pattern, for exampe
	for i in ~(N)*.c
	do	xxx
	done
which will skip the loop of there are no files ending with .c.

David Korn
dgk@...