Visit The New, Modern Unix Linux Community

Help required regarding variable expansion in UNIX

Thread Tools Search this Thread
Top Forums Shell Programming and Scripting Help required regarding variable expansion in UNIX
# 1  
Help required regarding variable expansion in UNIX


I have one variable coming from one file:
abc=$xyz/filename.txt where $xyz is defined in .profile file as say, /usr/dev/src

i am passing abc variable to one perl script as input parameter.
perl -s $abc

But inside the perl script execution, the variable $abc is just expanding to $xyz/filename.txt but not to /usr/dev/src/filename.txt
Because of this perl script is failing saying $xyz/filename.txt file not found.

Can any one please let me know, how can i expand the unix variable completely before passing it to perl script.

Shell - KSH (/usr/bin/ksh)
OS - SunOS 5.10

Thanks in Advance
# 2  
OSX 10.7.5, running ksh...
Is this what you are after?
Last login: Tue Nov 19 22:46:26 on ttys000
AMIGA:barrywalker~> ksh
AMIGA:uw> xyz="/usr/dev/src/"
AMIGA:uw> file="filename.txt"
AMIGA:uw> abc="$xyz$file"
AMIGA:uw> echo "$abc"
AMIGA:uw> exit
AMIGA:barrywalker~> _

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #975
Difficulty: Easy
In July 2009, Alan Cox quit his Linux kernel development role as the TTY layer maintainer after disagreement with Linus Torvalds about who should pay for beers during a trip to Amsterdam.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash variable expansion

Hello. The file /etc/fstab contains UUID=957c3295-9944-1593-82e2-2b90dede4312 / ext4 noatime,discard,acl,user_xattr 1 1 I fill a variable SOME_LINE=$( cat /etc/fstab | grep \/\..*ext4 | grep noatime,discard )echo $SOME_LINE... (3 Replies)
Discussion started by: jcdole
3 Replies

2. Shell Programming and Scripting

Protecting variable indicator ($) from expansion

Hello, I use a lot this command to edit a bunch of files at once find . -name filename" | xargs -ifoo sh -c 'echo foo ; sed "s/pattern1/pattern2/" foo > ./tmp ; mv -f ./tmp foo' I'm trying to put a function on my .bashrc file. function loopSed() { local filename=$1 local... (2 Replies)
Discussion started by: phollox
2 Replies

3. UNIX for Dummies Questions & Answers

Can I use a variable with brace expansion?

So, I was bored on the train today, and was thinking of ways to loop through elements of an array. I came up with the following simple script, but it doesn't work as brace expansion doesn't seem to work with variables. Is there something I'm missing, or does the shell just not work like this? ... (4 Replies)
Discussion started by: DeCoTwc
4 Replies

4. Shell Programming and Scripting

delay variable expansion

Hi forum, in my bash script I've many lines executing commands with redirection to log files. ... xyz_cmd 2>&1 > $BASENAME.$LINENO The trailing part of these lines doesn't look nice and I like to put it into a variable. The (not working) idea is something like that ... (3 Replies)
Discussion started by: wolfi089
3 Replies

5. Shell Programming and Scripting

Variable expansion in sed

The objective of the code below is to create sed script to be later executed. However, it bonks because $ARCHIVENAME expands to a directory specification so the forward slashes cause problems. I can think of a few solutions that would involve redesigning the process, but I'm hoping there might be... (4 Replies)
Discussion started by: tiggyboo
4 Replies

6. Shell Programming and Scripting

Bash variable delayed expansion?

i write a batch file , here is the content. dirname='date +%Y-%m-%d' mkdir dirname but it doen's work, it just create a folder named date and +%Y-%m-%d. i have tried run the command seperately in the bash prompt. after the first sentence executed , i use $dirname to watch the value of... (4 Replies)
Discussion started by: premotheus
4 Replies

7. UNIX for Dummies Questions & Answers

Variable brace expansion

I'm in the habit of using the following type of loop structure: for num in `seq $1 $2` do command doneWhile `seq $1 $2` is not exactly a huge resource hog, I would like to learn a better way. It seems that brace expansion is a good way to go: for num in {3..10}The problem, though, is... (2 Replies)
Discussion started by: treesloth
2 Replies

8. Shell Programming and Scripting

bash - delay expansion of variable

Hello - I have a bash script which does some logging, and I'd like to include the line number of the echo statement that pipes into $LOGGER: MYPID=$$ MYNAME=`basename $0` LOGGER="/usr/bin/logger -t $MYNAME($LINENO) -p daemon.error" ... echo 'this is an entry into the log file' | $LOGGER ... (3 Replies)
Discussion started by: scandora
3 Replies

9. Shell Programming and Scripting

Basic variable expansion not working...

#!/usr/bin/bash if then echo "Not valid arguments entered. Just username should be entered." else USER_NAME=$1 FILE_NAME=$ UNN=STUDIN\\\\$1 echo $UNN last STUDIN\\\\$1 last UNN If I type `last STUDIN\\eip060` it works but if I try to expand it with variable it is... (5 Replies)
Discussion started by: Zammy_bg
5 Replies

10. UNIX for Dummies Questions & Answers

ksh on HP-UX -- variable expansion

We have a script that runs in ksh on HP-UX 11.11. It takes three arguments. The last argument can be a filename or wildcard character. For example: script -s hello -t goodbye '*.d*' In a case such as this, I would wrap single quotes around the final argument because I dont want the shell to... (4 Replies)
Discussion started by: dangral
4 Replies

Featured Tech Videos