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$ in sed under tcsh vs bash

 
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Top Forums UNIX for Dummies Questions & Answers $ in sed under tcsh vs bash
# 1  
Old 03-31-2009
' in sed under tcsh vs bash
In bash, I can match the ' character in a substition involving the line ending symbol $, easily.
In tcsh I ran into a problem.

Code:

sed "s/$/'/g" filename
sed "s/$/'/g" < filename
sed -e "s/$/'/g" filename

Unmatched '.

Where can I find out why this is the case?
Last edited by uiop44; 03-31-2009 at 07:27 PM..
# 2  
Old 03-31-2009
Try with escape character.

sed "s/$/\'/g" filename
sed "s/$/\'/g" < filename
sed -e "s/$/\'/g" filename
# 3  
Old 03-31-2009
EOL ($) simple regexp in tcsh vs bash
I found the answer (I think).

It is in the tcsh man page.

Code:

sed "s/$/blah/g" filename

If you use double quotes (") this won't work. The dollar sign ($) will be interpreted as a variable. You'll get "Illegal variable."

But if you use single quotes...

Code:

sed 's/$/blah/g'

This works.

Now how do you deal with substituting a single quote characater?

Code:

sed 's/$/\'/g' filename
sed "s/$/\'/g" filename

Neither works. (Using FreeBSD, console or xterm.)

I'm reading the tcsh man page now... hoping to find the answer.

Update: I read some writings on the internet. The grymoire site says mixed quoting is a problem. Seems like, based on other stuff I've read, csh/tcsh makes it difficult to use the many UNIX utilities (i.e. script them), but may make it easier to call C functions of the OS, from the command line?

And ksh was an attempt to blend the two uses of the shell: UNIX utilities and UNIX C functions? The later I suspect is a rarer use?
Last edited by uiop44; 04-03-2009 at 09:18 PM..
 
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