Solved

ENV vars in SED patterns

Posted on 1998-04-03
8
660 Views
Last Modified: 2010-08-05
In a csh script, I want to use 'sed' to substitute a placeholder pattern with user's full names (extracted from GCOS with a targeted grep/cut operation and set to variable $NAME).
The script line I have goes like this:
         sed -e 's/PUTNAME/'$NAME'/' < $LOC/.vacation.msg1 > $LOC/.vacation.msg
Problem is: 'sed' doesn't  like the space between first and last name:
         sed: command garbled: s/PUTNAME/Cal
(note how it drops my last name)
Can someone suggest a better sed string and comment on quoting variables in 'sed'?
0
Comment
Question by:cal_sawyer
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 2
  • 2
8 Comments
 
LVL 3

Expert Comment

by:rickyr
ID: 2009068
Hi...
Take out the single quotes around $NAME or change them for double quotes ...
sed -e 's/PUTNAME/"$NAME"/'

The single quote is understood by sed to mean start and end of the editor commands.
That is why you get the garbled message. If you want to quote variables in sed then double quote them.

regards

0
 

Author Comment

by:cal_sawyer
ID: 2009069
Sorry.

The double quotes make the strings enclosed literal.

I'm editing a generic vacation notifier message header and get:

From: "$LOGNAME"@eciad.bc.ca ("$NAME")

So now it's literal AND I get doublequotes around the quoted vars!
0
 
LVL 84

Expert Comment

by:ozo
ID: 2009070
sed -e s/PUTNAME/$NAME/ < $LOC/.vacation.msg1 > $LOC/.vacation.msg

sed -e "s/PUTNAME/$NAME/" < $LOC/.vacation.msg1 > $LOC/.vacation.msg

sed -e 's/PUTNAME/'$NAME'/' < $LOC/.vacation.msg1 > $LOC/.vacation.msg
0
Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 84

Expert Comment

by:ozo
ID: 2009071
Sorry didn't read the questeion carefully enough
sed -e "s/PUTNAME/$NAME/" < $LOC/.vacation.msg1 > $LOC/.vacation.msg
sed -e s/PUTNAME/"$NAME"/ < $LOC/.vacation.msg1 > $LOC/.vacation.msg
sed -e 's/PUTNAME/'"$NAME"'/' < $LOC/.vacation.msg1 > $LOC/.vacation.msg
0
 

Author Comment

by:cal_sawyer
ID: 2009072
Bingo!  Wow, three solutions and I didn't get ONE of 'em .... back to the books, eh?

Thanks!
0
 
LVL 84

Expert Comment

by:ozo
ID: 2009073
It's not really sed who's processing the " or ' or space here.
They were being parsed by csh to determine what to pass to sed.
0
 
LVL 3

Expert Comment

by:rickyr
ID: 2009074
righty-oh
0
 
LVL 84

Accepted Solution

by:
ozo earned 100 total points
ID: 2009075
I take it you've gotten the answer you wanted?
sed -e "s/PUTNAME/$NAME/" < $LOC/.vacation.msg1 > $LOC/.vacation.msg
0

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Attention: This article will no longer be maintained. If you have any questions, please feel free to mail me. jgh@FreeBSD.org Please see http://www.freebsd.org/doc/en_US.ISO8859-1/articles/freebsd-update-server/ for the updated article. It is avail…
Java performance on Solaris - Managing CPUs There are various resource controls in operating system which directly/indirectly influence the performance of application. one of the most important resource controls is "CPU".   In a multithreaded…
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
Learn how to find files with the shell using the find and locate commands. Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:

756 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question