The UNIX and Linux Forums  

Go Back   The UNIX and Linux Forums > Top Forums > Shell Programming and Scripting
.
google unix.com



Shell Programming and Scripting Post questions about KSH, CSH, SH, BASH, PERL, PHP, SED, AWK and OTHER shell scripts and shell scripting languages here.

More UNIX and Linux Forum Topics You Might Find Helpful
Thread Thread Starter Forum Replies Last Post
how to unset the readonly variable Nidhi2177 UNIX for Advanced & Expert Users 2 09-12-2007 06:35 AM
Is there any way to set env variable in top level Makefile and unset when done umen Shell Programming and Scripting 0 10-23-2005 09:15 AM
define length of variable cbarker UNIX for Dummies Questions & Answers 10 04-01-2005 01:42 PM
How to define two variable in foreach command?? geoquest Shell Programming and Scripting 14 08-22-2002 07:11 PM
Using Grep to Define a Variable cspcspcsp UNIX for Dummies Questions & Answers 1 10-12-2001 01:22 PM

Closed Thread
English Japanese Spanish French German Portuguese Italian Dutch Swedish Russian Norwegian Hungarian Hebrew Danish Bulgarian Greek Powered by Powered by Google
 
LinkBack Thread Tools Search this Thread Rate Thread Display Modes
  #1 (permalink)  
Old 01-05-2009
Hangman2 Hangman2 is offline
Registered User
  
 

Join Date: Feb 2008
Posts: 27
How do I define a particular dir in PATH variable and then unset that dir

How do I define a particular dir in front of PATH variable and then run some job and then at the end of job SET the PATH variable to original?

in a script, WILL something like this work:

ORIG_PATH=$PATH
export PATH=/dir1/dir2:$PATH

RUN SOME JOBS .....

unset PATH
EXPORT PATH=$ORIG_PATH

Also is there a way to not UNSET the path and look for particular dir and take it out from PATH variable??
  #2 (permalink)  
Old 01-05-2009
jim mcnamara jim mcnamara is offline Forum Staff  
...@...
  
 

Join Date: Feb 2004
Location: NM
Posts: 5,805
if you define a value for PATH inside a script, the value is only changed as far as the process running the script is concerned. "Nobody" else is ever affected. I think this may be the simple answer to your question. Changes to a child environment variable are NOT reflected in the parent process' same environment variable.
  #3 (permalink)  
Old 01-06-2009
cfajohnson's Avatar
cfajohnson cfajohnson is offline Forum Advisor  
Shell programmer, author
  
 

Join Date: Mar 2007
Location: Toronto, Canada
Posts: 2,374
Quote:
Originally Posted by Hangman2 View Post
How do I define a particular dir in front of PATH variable and then run some job and then at the end of job SET the PATH variable to original?

in a script, WILL something like this work:

ORIG_PATH=$PATH
export PATH=/dir1/dir2:$PATH

RUN SOME JOBS .....

unset PATH
EXPORT PATH=$ORIG_PATH

There is no command called EXPORT; it is lowercase: export
Quote:

Also is there a way to not UNSET the path and look for particular dir and take it out from PATH variable??

There is (see http://cfaj.freeshell.org/shell/scripts/path-funcs-sh), but it is not necessary, since the change only affects the current script and its children.
Closed Thread

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 03:30 AM.


Powered by: vBulletin, Copyright ©2000 - 2006, Jelsoft Enterprises Limited. Language Translations Powered by .
vBCredits v1.4 Copyright ©2007 - 2008, PixelFX Studios
The UNIX and Linux Forums Content Copyright ©1993-2009. All Rights Reserved.Ad Management by RedTyger

Content Relevant URLs by vBSEO 3.2.0