Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Use of exported variable
Top Forums Shell Programming and Scripting Use of exported variable Post 302736977 by Scrutinizer on Wednesday 28th of November 2012 09:03:21 AM
Old 11-28-2012
There is no need to export a variable if one is only sourcing the other file. Variables are exported so that they work if one script calls another script in a subshell:

A.ksh:
Code:
#!/bin/ksh
chk1=56
export chk1
./B.ksh

Code:
$ ./A.ksh
56

If the scripts are to be run in parallel then you could use a third script, export the variable there and run both scripts in parallel in the background..
Or you can have a third file, set the variables there, and source the file in either script. You only need to export those variables if those scripts in turn call other scripts in a subshell that need that variable...

--
As a side note. The shebang #! only works if there is no space between the two characters, otherwise it is just a comment.
Last edited by Scrutinizer; 11-28-2012 at 10:38 AM..
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

What is the difference between a shell variable that is exported and the one that is

What is the difference between a shell variable that is exported and the one that is not exported? (1 Reply)
Discussion started by: JosephGerard
1 Replies

2. Linux

Can USB Devices Be Exported Over a Network?

While I know that it's possible to use something like SANE to share a USB scanner over a network, or use NBD or iSCSI to share a USB flash or external HD over the network, I've been wondering about a raw USB <--> TCP/IP transport. Back in the late 90s, I swear I remember hearing about a project... (2 Replies)
Discussion started by: deckard
2 Replies

3. Solaris

Remove the exported zpool

I had a pool which was exported and due to some issues on my SAN i was never able to import it again. Can anyone tell me how can i destroy the exported pool to free up the LUN. I tried to create a new pool on the same pool but it gives me following error # zpool create emcpool4 emcpower0c... (0 Replies)
Discussion started by: fugitive
0 Replies

4. Shell Programming and Scripting

Seeing variable which are exported with export

Greeting to all of you! I've small issue related to the variable which we are setting and exporting through scripts, in one of the script there are some variable used but I am not abel to get the detail as where they are set. I tried finding the detail with the help of env but no luck. ... (2 Replies)
Discussion started by: kumarmani
2 Replies

5. Shell Programming and Scripting

using the exported variable after su

Dear All,How can use a variable which I have exported when I am logged into one user to be used once I su to another user.something like 1.Login to Unix box as user12. export var1="TEST"3. su - user24. User the var1 value ( it should return TEST)I have checked just export does not work. any other... (1 Reply)
Discussion started by: rahulkav
1 Replies

6. Shell Programming and Scripting

Scope of exported function

Hi I'm hoping someone can tell me how to extend the scope of an exported function in the korn shell. I have written a function in a file that I dot in from my .kshrc file and it works fine. However I would like this function to be available to anyone in a certain group on the machine... (10 Replies)
Discussion started by: steadyonabix
10 Replies

7. AIX

exported filesystems on a NIM server

I have a filesystem that was exported sometime in the past, probably by NIM processes, but cannot be unexported now. How can I get rid of this? Any ideas? I tried rebooting and it survived it. hostname:/:$ exportfs -v /usr/lpp/bos.sysmgt/nim/methods... (2 Replies)
Discussion started by: kah00na
2 Replies

8. Solaris

TZ variable not exported when running from cron

Hi, I have the following executable in cron: 10 * * * 1-5 /apps/bin/dmg_cronlaunch -ENVI ENVIRONMENT -EXE exec -FILE ratespb_sdos_prdf_`TZ=US/Eastern;date +\%Y\%m\%d\%H\%M\%S`.sdos > /tmp/dmg_exec.log.`/usr/bin/date +\%Y_\%m_\%d_\%H:\%M:\%S` 2>&1 Comprised of the following: ... (13 Replies)
Discussion started by: Cvg
13 Replies

9. Shell Programming and Scripting

Store a column from an excel sheet (exported to txt) into a variable

I typically pull a bunch of data via SQL that lists a bunch of users and the server on which they want to access, as well as other attributes, in one row of an excel sheet and the number of rows is directly proportionate to the number of users. I'm trying to write a loop to read each line of the... (2 Replies)
Discussion started by: MaindotC
2 Replies

10. Solaris

Solaris: ldd doesn't find libraries in exported environment variable LD_LIBRARY_PATH

I have given the relevant details below. Why are the libraries in /export/home/builds/pc9x_root/960/build/powrmart/pmbuild/bin/SunOS.64.r are invisible to ldd? %setenv ... (3 Replies)
Discussion started by: old_as_a_fossil
3 Replies

LEARN ABOUT PHP

times

times(1)                                                           User Commands                                                          times(1)

NAME

       times - shell built-in function to report time usages of the current shell

SYNOPSIS

   sh
       times

   ksh
       times

DESCRIPTION

   sh
       Print the accumulated user and system times for processes run from the shell.

   ksh
       Print the accumulated user and system times for the shell and for processes run from the shell.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words,  following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari-
           able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation  are  not
           performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       ksh(1), sh(1), time(1), attributes(5)

SunOS 5.10                                                          15 Apr 1994                                                           times(1)
All times are GMT -4. The time now is 01:14 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy