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

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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

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LEARN ABOUT CENTOS

nspr-config

NSPR-CONFIG(1)						     Netscape Portable Runtime						    NSPR-CONFIG(1)

NAME

       nspr-config - Return meta information about nspr libraries

SYNOPSIS

       nspr-config [--prefix] [--exec-prefix] [--includedir] [--libs] [--cflags] [--libdir] [--version]

DESCRIPTION

       nspr-config is a shell script which can be used to obtain gcc options for building client pacakges of nspr.

OPTIONS

       --prefix
	   Returns the top level system directory under which the nspr libraries are installed.

       --exec-prefix
	   Returns the top level system directory under which any nspr binaries would be installed.

       --includedir count
	   Returns the path to the directory were the nspr headers are installed.

       --version
	   Returns the upstream version of nspr in the form major_version-minor_version-patch_version.

       --libs
	   Returns the compiler linking flags.

       --cflags
	   Returns the compiler include flags.

       --libdir
	   Returns the path to the directory were the nspr libraries are installed.

EXAMPLES

       The following example will query for both include path and linkage flags:

		   /usr/bin/nspr-config --cflags --libs

FILES

       /usr/bin/nspr-config

SEE ALSO

       pkg-config(1)

AUTHORS

       The NSPR liraries were written and maintained by developers with Netscape, Red Hat, Sun, Oracle, Mozilla, and Google.

       Authors: Elio Maldonado <emaldona@redhat.com>.

LICENSE

       Licensed under the Mozilla Public License, v. 2.0. If a copy of the MPL was not distributed with this file, You can obtain one at
       http://mozilla.org/MPL/2.0/.

nspr 4.10.2							   17 June 2014 						    NSPR-CONFIG(1)