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Full Discussion: Unable to change environment variables in bash script
Top Forums Shell Programming and Scripting Unable to change environment variables in bash script Post 302466483 by markolopa on Tuesday 26th of October 2010 12:51:30 PM
Old 10-26-2010
Sorry, I realise now that my post was not clear enough.

All I want is be able to use the string "PASSWORD" instead of my actual password in the export commands inside my .bashrc and to change these variables replacing "PASSWORD" by the actual password by using a script. In that way my password is not written in the disk.

I just found a way to do it. Here is it:
Code:
read -s -p "Password: " passw; echo
for var in `set | perl -lne 'print $1 if /(.*?)=.*PASSWORD/'`; do
    eval val=\${$var//PASSWORD/$passw}
    #echo "val = $val"
    eval export $var=\'$val\'
done

The for line is kind of ugly, but I couldn't find a more elegant way of looping over all environment variables. Anyway, it works and I am happy with it.

The final difficulty I had with it is that if I put "#!/bin/bash" in the beginning and call the script as a sub shell I don't get the exports... The solution was to add

alias set-password='source $HOME/bin/set-password.sh'

to my .bashrc, to avoid having to type the source command.

Thanks a lot everybody!
Marko
 

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LEARN ABOUT CENTOS

bashbug-64

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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