How to walk through a config file with /bin/sh Post: 302347952

Sponsored Content

Top Forums Shell Programming and Scripting How to walk through a config file with /bin/sh Post 302347952 by smhaller on Thursday 27th of August 2009 03:29:52 AM

08-27-2009

Registered User

Hi zaxxon,

thanks for your answer and your help trying to get the goal.

My problem is not, to exchange value "a" with value "b", but the interactive part above. The example there is how the prompts should look like. but doing this with a "while read" loop fails.

This is what I've created:

Code:

while read line
do
  comment=`echo $line | sed -e 's/#.*/#/'`
  if [ $comment = "#" ]; then
      echo "$line" | sed -n 's/#.*/&/p' >>$tmpfile
  else
     cf_key=`echo $line | awk 'BEGIN {FS = "="} {print $1}'`
     cf_val=`echo $line | awk 'BEGIN {FS = "="} {print $2}'`
     printf "Set $cf_key - Actual ($cf_val): \n"
     read value
     if [ $value = "" ]; then
        echo "$cf_key=$cf_val" >>$tmpfile
     else
        echo "$cf_key=$value" >>$tmpfile
     fi
  fi 
done < $config

Running this will result in several lines of output on screen, but no input reading prompt (read value, get ignored).
My question is: Is there another way to get this working?

The for-loop is not an option as I've written at the begin, because it does'nt handle the file line by line (whitespace problem). Except if ther's a way to advise the for-loop to ignore the whitespace. I've alread played around with setting of IFS, but I didn't come any further.

Best regards,
Stefan

smhaller

View Public Profile for smhaller

Find all posts by smhaller

8 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

/bin/sh: /usr/bin/vi: No such file or directory when doing crontab

I just set up an ftp server with Red Hat 5.2. I am doing the work, I'm baby stepping, but it seems like every step I get stuck. Currently, I'm trying to set up a crontab job, but I'm getting the following message: /bin/sh: /usr/bin/vi: No such file or directory. I see that vi exists in /bin/vi,...

2. Programming

ftw/nftw -- filesystem tree walk

Hi, I recently experimented with ftw() and nftw(). These are function for calling some function for every file in a subtree. I need to get full information about type of file. Almost everything is working according to documentation but I noticed following problem: With a value FTW_PHYS...

3. UNIX for Dummies Questions & Answers

fuser: difference with bin/sh and bin/ksh shell script

Hi, I have a problem I don't understand with fuser. I launch a simple shell script mysleep.sh: I launch the command fuser -fu mysleep.sh but fuser doesn't return anything excepted: mysleep: Then I modify my script switching from #!/bin/sh to #!/bin/ksh I launch the command fuser -fu...

4. Shell Programming and Scripting

parsing config file to create new config files

Hi, I want to use a config file as the base file and parse over the values of country and city parameters in the config file and generate separate config files as explained below. I will be using the config file as mentioned below: (config.txt) country:a,b city:1,2 type:b1...

5. Shell Programming and Scripting

Shell script that will compare two config files and produce 2 outputs 1)actual config file 2)report

Hi I am new to shell scripting. There is a requirement to write a shell script to meet follwing needs.Prompt reply shall be highly appreciated. script that will compare two config files and produce 2 outputs - actual config file and a report indicating changes made. OS :Susi linux ver 10.3. ...

6. OS X (Apple)

When to use /Users/m/bin instead of /usr/local/bin (& whats the diff?)?

Q1. I understand that /usr/local/bin means I can install/uninstall stuff in here and have any chance of messing up my original system files or effecting any other users. I created this directory myself. But what about the directory I didn't create, namely /Users/m/bin? How is that directory...

7. HP-UX

SNMP Walk need to enable

We are using a third party to monitor unix servers performance since last 60 days, since last 3 days we are not able to get the performance alarms on our tool. When we check the same with the tool team, they said "SNMP walk is not happening for all the servers." Performance we mean...

8. Shell Programming and Scripting

Usage of #!/bin/sh vs #!/bin/bash shell scripts?

Some question about the usage of shell scripts: 1.) Are the commands of the base shell scripts a subset of bash commands? 2.) Assume I got a long, long script WITHOUT the first line. How can I find out if the script was originally designed f�r "sh" or "bash"? 3.) How can I check a given...

LEARN ABOUT PHP

php_strip_whitespace

PHP_STRIP_WHITESPACE(3) 						 1						   PHP_STRIP_WHITESPACE(3)

php_strip_whitespace - Return source with stripped comments and whitespace

SYNOPSIS

       string php_strip_whitespace (string  $filename)

DESCRIPTION

	Returns the PHP source code in $filename with PHP comments and whitespace removed. This may be useful for determining the amount of actual
       code in your scripts compared with the amount of comments. This is similar to using php -w from the commandline.

PARAMETERS

	      o $filename
		- Path to the PHP file.

RETURN VALUES

	The stripped source code will be returned on success, or an empty string on failure.

       Note

	       This function works as described as of PHP 5.0.1. Before this it would only return an empty string. For more  information  on  this
	      bug and its prior behavior, see bug report #29606.

EXAMPLES

       Example #1

	      php_strip_whitespace(3) example

	      <?php
	      // PHP comment here

	      /*
	       * Another PHP comment
	       */

	      echo	  php_strip_whitespace(__FILE__);
	      // Newlines are considered whitespace, and are removed too:
	      do_nothing();
	      ?>

	      The above example will output:

	      <?php
	       echo php_strip_whitespace(__FILE__); do_nothing(); ?>

	       Notice the PHP comments are gone, as are the whitespace and newline after the first echo statement.

PHP Documentation Group 												   PHP_STRIP_WHITESPACE(3)