| From: | Karl DeBisschop <kdebisschop(at)range(dot)infoplease(dot)com> |
|---|---|
| To: | scrappy(at)hub(dot)org |
| Cc: | tgl(at)sss(dot)pgh(dot)pa(dot)us, pgman(at)candle(dot)pha(dot)pa(dot)us, peter_e(at)gmx(dot)net, pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] TODO list updated |
| Date: | 2000-01-13 17:42:16 |
| Message-ID: | 200001131742.MAA23842@skillet.infoplease.com |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| 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(at)alert(dot)infoplease(dot)com>
617.832.0332 (Fax: 617.956.2696)
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