Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Extracting value of a variable
Top Forums Shell Programming and Scripting Extracting value of a variable Post 302955489 by wisecracker on Thursday 17th of September 2015 04:00:24 PM
Old 09-17-2015
Puzzled; is this what you are after?
OSX 10.7.5, default terminal running 'sh'...
Code:
#!/bin/sh
# Value_extractor.sh Variable1
echo 'Variable1="This is a string...";' > /tmp/FileA
. /tmp/FileA
eval echo '$'"$1" > /tmp/someval
Retrieved_value=$( cat /tmp/someval )
echo $Retrieved_value

Results:=
Code:
Last login: Thu Sep 17 20:15:40 on ttys000
AMIGA:barrywalker~> cd Desktop/Code/Shell
AMIGA:barrywalker~/Desktop/Code/Shell> chmod 755 Value_extractor.sh
AMIGA:barrywalker~/Desktop/Code/Shell> ./Value_extractor.sh Variable1
This is a string...
AMIGA:barrywalker~/Desktop/Code/Shell> _

This User Gave Thanks to wisecracker For This Post:
guknvivek
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

extracting value in variable??

Hi in Below example. i want "n = aa.txt.gz" ????????????? plz help m=aa.txt n=echo`gzip $m` echo $n (1 Reply)
Discussion started by: manish.s
1 Replies

2. Shell Programming and Scripting

How to define a variable with variable definition is stored in a variable?

Hi all, I have a variable say var1 (output from somewhere, which I can't change)which store something like this: echo $var1 name=fred age=25 address="123 abc" password=pass1234 how can I make the variable $name, $age, $address and $password contain the info? I mean do this in a... (1 Reply)
Discussion started by: freddy1228
1 Replies

3. Shell Programming and Scripting

Extracting a word from a variable

Hi Guys, Need you quick assistance on the below, trying to extract a word from a variable i.e. acmi101acmi102acmi103acmi104 When i use the following code awk '{gsub(/cmi102/,"")};1' it leaves a space in the variable, need to get rid of the space that it leaves. Any ideas. the above... (3 Replies)
Discussion started by: eo29
3 Replies

4. Shell Programming and Scripting

Extracting data from SQL using a variable from a file

Though, its not new, I am a newbie to shell scripting. Please help me with the below. There are two steps. First one is to read a table and create a file with the distinct values. I am able to get this done. Second step is to read the file (which has the single value, like a number) and... (1 Reply)
Discussion started by: singas1
1 Replies

5. Shell Programming and Scripting

Extracting variable value from file

Hi All i have created a file as below cat > REJ_FILE_LIST.dat CUST.DAT,$ABC/TEST.DAT|$ABC/TEST1.DAT|$ABC/TEST2.dat Ctrl+d in another script the variable is set as ABC='/data/proj/Cust' the requirement is to read the second column from file REJ_FILE_LIST.dat which contains... (1 Reply)
Discussion started by: zulfi123786
1 Replies

6. Red Hat

How to pass value of pwd as variable in SED to replace variable in a script file

Hi all, Hereby wish to have your advise for below: Main concept is I intend to get current directory of my script file. This script file will be copied to /etc/init.d. A string in this copy will be replaced with current directory value. Below is original script file: ... (6 Replies)
Discussion started by: cielle
6 Replies

7. Shell Programming and Scripting

extracting Number variable and the following digits.

HI all, I have output of something like this: crab: ExitCodes Summary >>>>>>>>> 12 Jobs with Wrapper Exit Code : 50117 List of jobs: 1-12 See https:///twiki/something/ for Exit Code meaning crab: ExitCodes Summary >>>>>>>>> 5 Jobs with Wrapper Exit Code : 8001 List of... (20 Replies)
Discussion started by: emily
20 Replies

8. Shell Programming and Scripting

Extracting characters and storing in some variable

eg: ./myProgram.sh filename.cpp I want to remove the :".cpp" extension from the filename.cpp expected output: filename (3 Replies)
Discussion started by: umesh314
3 Replies

9. Shell Programming and Scripting

Extracting substrings from a string of variable length

I have a string like Months=jan feb mar april x y .. Here the number of fields in Months is not definite I need to extract each field in the Months string and pass it to awk . Don't want to use for in since it is a loop . How can i do it (2 Replies)
Discussion started by: Nevergivup
2 Replies

10. Shell Programming and Scripting

Extracting substring from variable

Hi All, I'm facing issue wherein I have 2 character string like 'CR' and 'DR' and I want to extract just 1st character but am unable to do it. I tried below options but they are returning me 2nd character only, var="CR" echo ${var:1} returns just "R" echo ${var:0} returns "CR" ... (5 Replies)
Discussion started by: arvindshukla81
5 Replies

LEARN ABOUT OSX

cpanplus::shell

CPANPLUS::Shell(3pm)					 Perl Programmers Reference Guide				      CPANPLUS::Shell(3pm)

NAME

       CPANPLUS::Shell - base class for CPANPLUS shells

SYNOPSIS

	   use CPANPLUS::Shell; 	    # load the shell indicated by your
					    # config -- defaults to
					    # CPANPLUS::Shell::Default

	   use CPANPLUS::Shell qw[Classic]  # load CPANPLUS::Shell::Classic;

	   my $ui      = CPANPLUS::Shell->new();
	   my $name    = $ui->which;	    # Find out what shell you loaded

	   $ui->shell;			    # run the ui shell

DESCRIPTION

       This module is the generic loading (and base class) for all "CPANPLUS" shells. Through this module you can load any installed "CPANPLUS"
       shell.

       Just about all the functionality is provided by the shell that you have loaded, and not by this class (which merely functions as a generic
       loading class), so please consult the documentation of your shell of choice.

BUG REPORTS

       Please report bugs or other issues to <bug-cpanplus@rt.cpan.org<gt>.

AUTHOR

       This module by Jos Boumans <kane@cpan.org>.

COPYRIGHT

       The CPAN++ interface (of which this module is a part of) is copyright (c) 2001 - 2007, Jos Boumans <kane@cpan.org>. All rights reserved.

       This library is free software; you may redistribute and/or modify it under the same terms as Perl itself.

SEE ALSO

       CPANPLUS::Shell::Default, CPANPLUS::Shell::Classic, cpanp

perl v5.16.2							    2012-10-11						      CPANPLUS::Shell(3pm)
All times are GMT -4. The time now is 06:16 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy