topic Re: Shell redirection question in Operating System - HP-UX

Shell redirection question

Unix Administrator_9 — Tue, 06 Apr 2004 18:08:46 GMT

In a script I've got something like:
i=`ls *.x *.y *.z`
for j in $i
do

The issue I'm facing at the moment is if one of the file types, eg *.x, doesn't exist I get the message "*.x not found". I've tried redirecting this to /dev/null but I still can't get rid of the message. Any suggestions?

Many Thanks,
Scott Taylor.

Re: Shell redirection question

Sundar_7 — Tue, 06 Apr 2004 18:12:10 GMT

Hi Scott,

i=`ls *.x *.y *.z 2>/dev/null'
for j in $i
do

This should work

Sundar

Re: Shell redirection question

Unix Administrator_9 — Tue, 06 Apr 2004 18:18:06 GMT

Thx - I had the the last back quote in the wrong location.

Cheers,
SJT

Re: Shell redirection question

Bill Hassell — Tue, 06 Apr 2004 18:22:06 GMT

A simpler way to write this:

for j in $(ls *.x *.y *.z 2>/dev/null)
do
...
done

The use of backticks (grave accent, reverse apostrophe, etc) is deprecated and very easy to misinterpret. $(...) can also be nested if needed.