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Full Discussion: Creating variables in bash
Top Forums Shell Programming and Scripting Creating variables in bash Post 302626721 by kristinu on Thursday 19th of April 2012 04:49:07 PM
Old 04-19-2012
What do you think of using

Code:
export

Example

Code:
i=4
s4="    "
frmt_titl="${bYl}%s${nClor}\n"
export frmt${w}_titl="${s4}$frmt_titl"




---------- Post updated at 03:46 PM ---------- Previous update was at 03:44 PM ----------

Quote:
Originally Posted by Scrutinizer
You can use eval (or indirect references in bash/ksh93), but you need to be careful with security, especially with user input or input files...

Code:
$ for i in 1 2 3; do eval var$i=$((i*10)); done
$ echo $var1 $var2 $var3
10 20 30

I am planning to define all this stuff in a bash file. Then source it, so that I can use the variables from another script.

---------- Post updated at 03:49 PM ---------- Previous update was at 03:46 PM ----------

Code:


Code:



cat utility.bash

#!/bin/bash
for i in 1 2 3; do eval var$i=$((i*10)); done









Code:



cat test.bash

#!/bin/bash
source utility.bash
echo "$var1"

 

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LEARN ABOUT CENTOS

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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