Sponsored Content
Top Forums Shell Programming and Scripting How to change Linux Terminal environment variable in a perl or bash script? Post 302836081 by Corona688 on Tuesday 23rd of July 2013 01:14:17 PM
Old 07-23-2013
A more flexible version:

Code:
#!/usr/bin/perl

$ENV{MYVAR}="asdf";

my $shell=shift;
if($shell) {
        exec $shell, @ARGV;
}
else
{
        exec "bash", "-sh";
}

When not given a shell it assumes bash, otherwise it runs what you tell it on the commandline.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

passing variable from bash to perl from bash script

Hi All, I need to pass a variable to perl script from bash script, where in perl i am using if condition. Here is the cmd what i am using in perl FROM_DATE="06/05/2008" TO_DATE="07/05/2008" "perl -ne ' print if ( $_ >="$FROM_DATE" && $_ <= "$TO_DATE" ) ' filename" filename has... (10 Replies)
Discussion started by: arsidh
10 Replies

2. Linux

How to create file on Linux using environment variable in the dirpath

Hi all, I am running a Java program on a Linux server in which I read in a base directory path from the *.properties file. During processing, I build a unique file name and create a file to save data, concatenating the directory path and the file name. Works fine, except that I now need to... (2 Replies)
Discussion started by: patricia1of5
2 Replies

3. Shell Programming and Scripting

Not able to change the environment variable in k shell

Hi All, I am trying the following to set the environment variable in my scirpt.But it is not setting with the correct value. Can you guys please help me out to get the correct value. 1. I have environment variable NLS_LANG=American_America.UTF8 2. In my script (ksh) i am trying the following... (1 Reply)
Discussion started by: girish.raos
1 Replies

4. Shell Programming and Scripting

Unable to change environment variables in bash script

Hello! For the moment some settings in my .bashrc contain the password of my company's firewall, which is not a good idea. I would like to use the string "PASSWORD" set in .bashrc and a script that changes all appearances of "PASSWORD" in the environment variables by the actual password (which... (4 Replies)
Discussion started by: markolopa
4 Replies

5. Shell Programming and Scripting

Perl Csh - setenv ENV change environment variable

I have 3 programs, 1 in perl, 2 in csh: call them perl1, csh1 and run.ol I need perl1 to set csh1 variable NOLOG_qsub = "" I need perl1 to run, run.ol run.ol takes the executable and input and outputs to output run.ol#!/bin/csh -f # run.ol executable input output perl1 should... (1 Reply)
Discussion started by: austinj
1 Replies

6. UNIX for Dummies Questions & Answers

setting a environment variable on linux

I want to set a enviroment variable VDC_DIR to a particular directory. I am doing it as export VDC_DIR=/abc it gets set but when i logout and do relogin than its not there. one way could be setting it in .profile file. but i have seen it on another box where it is not present in... (2 Replies)
Discussion started by: Jcpratap
2 Replies

7. Shell Programming and Scripting

How to start a shell script in a terminal console from graphic environment?

Hello. Normally when you double click on the file name, the shell script start in background. If you want to see what is going on, you must open a terminal console and start the shell within the terminal. Is it possible to start directly a shell script in a terminal console from the file... (0 Replies)
Discussion started by: jcdole
0 Replies

8. UNIX for Dummies Questions & Answers

How to change colours in Linux Terminal Xfce?

Hi all - just started using Linux Mint 17 and I need to change the Foreground & Background Colours for the Terminal, my eyesight is not what it used to be many years ago, so any help would be much appreciated. Regards Malcolm (6 Replies)
Discussion started by: electrocad
6 Replies

9. UNIX for Dummies Questions & Answers

Environment variable substitution in Linux make

I know that I can do this in bash ver=${VERSION:-$DEFVERSION} so ver is $VERSION if it's set but $DEFVERSION if $VERSION isn't set I want to do the same thing as a macro in a Makefile and can't get it to work - maybe something like... VER=$(shell ${$(VERSION):-$(DEFVERSION)}) Any help... (1 Reply)
Discussion started by: JerryHone
1 Replies

10. Shell Programming and Scripting

Passing variable from bash to perl script

Hi All, I need to pass a variable from bash script to perl script and in the perl script i am using those variables in the sql query but its giving error : Use of uninitialized value $ENV{"COUNTRYCD"} in concatenation (.) or string at /GIS_ROOT/custom/tables/DBread_vendor.pl line 50. Can ... (6 Replies)
Discussion started by: NileshJ
6 Replies
SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-a] [-c COMMAND] [-e] [-f] [-q] [-t] [file] DESCRIPTION
Script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Options: -a Append the output to file or typescript, retaining the prior contents. -c COMMAND Run the COMMAND rather than an interactive shell. This makes it easy for a script to capture the output of a program that behaves differently when its stdout is not a tty. -e Return the exit code of the child process. Uses the same format as bash termination on signal termination exit code is 128+n. -f Flush output after each write. This is nice for telecooperation: One person does `mkfifo foo; script -f foo' and another can super- vise real-time what is being done using `cat foo'. -q Be quiet. -t Output timing data to standard error. This data contains two fields, separated by a space. The first field indicates how much time elapsed since the previous output. The second field indicates how many characters were output this time. This information can be used to replay typescripts with realistic typing and output delays. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. Script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is utilized by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism), scriptreplay(1). HISTORY
The script command appeared in 3.0BSD. BUGS
Script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. AVAILABILITY
The script command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/. Linux July 30, 2000 Linux
All times are GMT -4. The time now is 03:29 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy