Horton

Re: [HACKERS] TODO list updated

Karl DeBisschop <kdebisschop@range.infoplease.com>

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From: Karl DeBisschop <kdebisschop@range.infoplease.com>
To: scrappy@hub.org
Cc: tgl@sss.pgh.pa.us, pgman@candle.pha.pa.us, peter_e@gmx.net, pgsql-hackers@postgreSQL.org
Date: 2000-01-13T17:42:16Z
Lists: pgsql-hackers 
> bash-2.03$ which echo
> /usr/slocal/bin/echo

I don't think that test has bearing on whether echo is builtin.
Consider the following:

skillet.infoplease.com:/u/kdebisschop> export PATH=.:$PATH
skillet.infoplease.com:/u/kdebisschop> which echo
/usr/bin/echo
skillet.infoplease.com:/u/kdebisschop> echo '#!/bin/echo trap door'>./echo
skillet.infoplease.com:/u/kdebisschop> chmod +x echo 
skillet.infoplease.com:/u/kdebisschop> which echo
/disk/1/home/kdebisschop/echo
skillet.infoplease.com:/u/kdebisschop> ./echo foo
trap door ./echo foo
skillet.infoplease.com:/u/kdebisschop> echo foo
foo

So bash is using the builtin, but which shows the script.

BUT, for aliases (this is a totally separate shell, BTW):

skillet.infoplease.com:/u/kdebisschop> alias echo='echo tarp door'
skillet.infoplease.com:/u/kdebisschop> echo foo
tarp door foo
skillet.infoplease.com:/u/kdebisschop> which echo
/usr/bin/echo

-- 
Karl DeBisschop <kdebisschop@alert.infoplease.com>
617.832.0332 (Fax: 617.956.2696)

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