Multiple executables in path (Was: NON-SOURCE POSTINGS CONSIDERED HARMFUL!)

[Maarten Litmaath]

In article <17373:Jan1908:30:3191 at kramden.acf.nyu.edu>,
	brnstnd at kramden.acf.nyu.edu (Dan Bernstein) writes:
)Hmmm. I've always been satisfied with the speed of

[_Excessively_ long line split.]

)  alias which 'echo `echo "$PATH" | tr : '\''\012'\'\
)  ' | sed -e '\''s+$+/\!:1+'\'' -e '\''s:^:/.[.]:'\'\
)  '` | sed '\''s:/../:/:g'\'''

This alias doesn't deal with aliases (easily fixed), but most importantly
it _fails_.  Two examples:

	% which passwd
	/bin/passwd /usr/bin/passwd /etc/passwd

	# How odd: /etc/passwd is executable!

	% set path=($path .)
	% cp /bin/true foo
	% which foo


	# Silence.

Had you read the documentation of `which5', you would have known it's not
that trivial to get things right.
--
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