Sponsored Content
Top Forums Shell Programming and Scripting Dynamically setting of environment variable... Can it be done? Post 302555453 by Morelia on Wednesday 14th of September 2011 06:53:59 PM
Old 09-14-2011
Corona688,

Thank you very much for replying so quickly to my post. Could you please kindly explain the first example you gave me, because I do not understand how to apply it and will like to try it.

Code:
$ NAME="VAR"
$ VAR="1234"
echo "${!NAME}"
1234
$

 

10 More Discussions You Might Find Interesting

1. Programming

Setting Environment Variable date

Hi to all... I'm currently running a C++ program in Unix environment and it is dependent to a Unix environment variable with a date value. ex: echo $DateToday 20060403 I want to change that date in my C++ program, changing the value date to 20061120 and revert back to original... (6 Replies)
Discussion started by: d3ck_tm
6 Replies

2. Programming

Setting environment variable using JNI call

I have function declaration in Java and same function definition written in C programming language.. A JNI call from Java is made to a fuction...Function would set the environment variable { putenv(cEnvString1);} using C-built -in function ..and later return the encrypted string... putenv is... (6 Replies)
Discussion started by: shafi2all
6 Replies

3. UNIX for Dummies Questions & Answers

setting environment variable in awk

Dear all, I have a data sample... Dose: Summed ROI: Bladder ************************** Bin Dose Volume 001 0.700 100.000 002 0.715 99.998 168 3.142 0.368 169 3.157 0.338 170 3.171 0.292 Dose: Summed ROI:... (2 Replies)
Discussion started by: tintin72
2 Replies

4. Programming

Setting Environment variable..!

Hi, I already have one CPP program which invokes the C program.And the C program contains whole function definitions..!This is a working program..I have to enable the logs in both CPP as well as in the C program ..!So I am reading the enviornmental variable log path from the CPP and doing the... (2 Replies)
Discussion started by: Kattoor
2 Replies

5. Shell Programming and Scripting

Setting Environment variable from value in file

I've searched Google and now this forum. Best guess is my search fu is not good (and it probably isn't). The Google search did bring me here. Background I have a number of Korn Shell scripts who all use one of 3 values for an environment variable used in the backup system. On occasion one or... (8 Replies)
Discussion started by: WolfBrother
8 Replies

6. Shell Programming and Scripting

problem with setting environment variable

shell script: #!/bin/csh set VAR=12345 echo $VAR will peacefully give the output 12345 at shell. I need to use C++ to do the same in some part of the code: string str = "12345"; retValue="set var1= "+str; system(retValue1.c_str()); system("echo $var1"); This doesn't create a system... (1 Reply)
Discussion started by: harshvardhan360
1 Replies

7. 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

8. UNIX for Dummies Questions & Answers

Setting environment variable problem in Ubuntu?

I am trying to install timbl- memory based learner tools in ubuntu. it after unpacking the tar file it brings the following msg No package 'ticcutils' found Consider adjusting the PKG_CONFIG_PATH environment variable if you installed software in a non-standard prefix. Alternatively, you... (1 Reply)
Discussion started by: gbdaw
1 Replies

9. UNIX for Dummies Questions & Answers

STTY Columns Setting Environment Variable?

I am wondering about the following: stty columns 140 I have found that a number of times I need to set my display columns to a high number (such as 140) but I have to do this every time I login to use putty/ssh. Can we set this with an environmental variable so that it is permanent? Also... (4 Replies)
Discussion started by: newbie2010
4 Replies

10. Shell Programming and Scripting

Dynamically changing environment variable

Linux Redhat, BASH Shell. I want to put this in my .bash_profile I have log files that go to directory paths based in part on other variables such as went DB Name is set in memory. So if the DB Name changes the path to the log file changes. How do I create an environment variable I put into... (6 Replies)
Discussion started by: guessingo
6 Replies
env(1)							      General Commands Manual							    env(1)

NAME
env - set environment for command execution SYNOPSIS
[name value] ... [command [arguments ...]] DESCRIPTION
obtains the current environment, modifies it according to its arguments, then executes the command with the modified environment. Argu- ments of the form are merged into the inherited environment before the command is executed. The option causes the inherited environment to be ignored completely so that the command is executed with exactly the environment specified by the arguments. The option is obsolete and has the same effect as the option. If no command is specified, the resulting environment is printed, one name-value pair per line. RETURN VALUE
If command is invoked, the exit status of is the exit status of command; otherwise, exits with one of the following values: 0 completed successfully. 1-125 encountered an error. 126 command was found but could not be invoked. 127 command could not be found. EXTERNAL INFLUENCES
Environment Variables determines the language in which messages are displayed. If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari- able. If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5). International Code Set Support Single- and multi-byte character code sets are supported. WARNING
The option is obsolete. Use instead. SEE ALSO
sh(1), exec(2), profile(4), environ(5). STANDARDS CONFORMANCE
env(1)
All times are GMT -4. The time now is 10:21 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy