Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: How to parse config variables from external file to shell script
Top Forums Shell Programming and Scripting How to parse config variables from external file to shell script Post 302125948 by aigles on Monday 9th of July 2007 08:24:55 AM
Old 07-09-2007
You can do something like that :
Code:
# Function: get_config_list config_file
          # Purpose : Print the list of configs from config file
get_config_list()
{
   typeset config_file=$1

   awk -F '[][]' '
      NF==3 && $0 ~ /^\[.*\]/ { print $2 }
   ' ${config_file}
}

# Function : set_config_vars config_file config [var_prefix]
# Purpose  : Set variables (optionaly prefixed by var_prefix) from config in config file
set_config_vars()
{
   typeset config_file=$1
   typeset config=$2
   typeset var_prefix=$3
   typeset config_vars

   config_vars=$( 
        awk -F= -v Config="${config}" -v Prefix="${var_prefix}" '
        BEGIN { 
           Config = toupper(Config);
           patternConfig = "\\[" Config "]";
        }
        toupper($0)  ~ patternConfig,(/\[/ && toupper($0) !~ patternConfig)  { 
           if (/\[/ || NF <2) next;
           sub(/^[[:space:]]*/, "");
           sub(/[[:space:]]*=[[:space:]]/, "=");
           print Prefix $0;
        } ' ${config_file} )

   eval "${config_vars}"
}

#
# Set variables for all config from config file
#
file=config.txt
for cfg in $(get_config_list ${file})
do
   echo "--- Configuration [${cfg}] ---"
   unset $(set | awk -F= '/^cfg_/  { print $1 }') cfg_
   set_config_vars ${file} ${cfg} cfg_
   set | grep ^cfg_
done

Input file (config.txt)
Code:
[set_1]
path=c://dataset/set1
v1= a.bin
v2= b.bin

[set_2]
path=c://dataset/set2
v1= xy.bin
v2= abc.bin

[set_3]
v1 = value1

Output:
Code:
--- Configuration [set_1] ---
cfg_path=c://dataset/set1
cfg_v1=a.bin
cfg_v2=b.bin
--- Configuration [set_2] ---
cfg_path=c://dataset/set2
cfg_v1=xy.bin
cfg_v2=abc.bin
--- Configuration [set_3] ---
cfg_v1=value1

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Edit a config file using shell script

I need to edit a config file using shell script. i.e., Search with the 'key' string and edit the 'value'. For eg: below is what I have in the config file "configfile.cfg". Key1=OldValue1 Key2=OldValue2 I want to search for "Key1" and change "OldValue1" to "NewValue1" Thanks for your... (7 Replies)
Discussion started by: rajeshomallur
7 Replies

2. Shell Programming and Scripting

how to access variables in a config file inside a shell script

I'm writing a shell script. I want to put the variables in a separate config files and use those inside my script. e.g. the config file (temp.conf)will have the values like mapping=123 file_name=xyz.txt I want to access these variables in temp.conf(i.e. mapping and file_name) from inside the... (7 Replies)
Discussion started by: badrimohanty
7 Replies

3. Shell Programming and Scripting

sed command to parse Apache config file

Hi there, am trying to parse an Apache 'server' config file. A snippet of the config file is shown below: ..... ProxyPassReverse /foo http://foo.example.com/bar ..... ..... RewriteRule ^/(.*) http://www.example.com/$1 RewriteRule /redirect https://www.example1.com/$1 ........ (7 Replies)
Discussion started by: jy2k7ca
7 Replies

4. Shell Programming and Scripting

Parse config file and store the values in variables

Hi, I have a config file that has blank, commented lines. I need to escape commented lines, blank lines, parse the remaining lines and store them in variables or array. the config file contains the following lines. # config file # Define Oracle User ORA_USER=abcde ORA_PASS=xyzabc... (8 Replies)
Discussion started by: Lakshmi Chowdam
8 Replies

5. Shell Programming and Scripting

Parse config file data to script variable

I have a script with few pre defined variables. Also have a config file. Something like this. # config file # Define Oracle User MOD1_TAG=abcde MOD2_TAG=xyzabc MOD3_TAG=def I need to parse the config file and have each of the value copied to different variables. Please suggest what... (1 Reply)
Discussion started by: souryadipta
1 Replies

6. 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. ... (4 Replies)
Discussion started by: muraliinfy04
4 Replies

7. Shell Programming and Scripting

Getting category when given the variable from external file to shell script

Hi, I have a script that interacts with a config file in the format: file1.txt file2.txt file3.txt file4.txt file5.txt file6.txt I would like to return the Category, when given the file name. (11 Replies)
Discussion started by: MoreCowbell
11 Replies

8. Shell Programming and Scripting

Parse variables from C++ to shell

Hi All, #include <iostream> int main() { std::int foo = 34; system("mkdir /home/linuxUser/fooDir"); system("vi fooFile") system("write foo in fooFile") foo = 43; foo = read foo from fooFile; std::cout << "foo = " << foo ; } result should be foo = 34 can... (3 Replies)
Discussion started by: linuxUser_
3 Replies

9. UNIX for Dummies Questions & Answers

How to write Config shell script to pass variables in master shell script?

Dear Unix gurus, We have a config shell script file which has 30 variables which needs to be passed to master unix shell script that invokes oracle database sessions. So those 30 variables need to go through the database sessions (They are inputs) via a shell script. one of the variable name... (1 Reply)
Discussion started by: dba1981
1 Replies

10. Shell Programming and Scripting

How to write config shell script to pass variables in master shell script?

Dear Unix gurus, We have a config shell script file which has 30 variables which needs to be passed to master unix shell script that invokes oracle database sessions. So those 30 variables need to go through the database sessions (They are inputs) via a shell script. one of the variable name... (1 Reply)
Discussion started by: dba1981
1 Replies

LEARN ABOUT HPUX

rc.config

rc.config(4)						     Kernel Interfaces Manual						      rc.config(4)

NAME

       rc.config, rc.config.d - files containing system configuration information

SYNOPSIS

DESCRIPTION

       The  system  configuration  used  at  startup  is  contained in files within the directory The file sources all of the files within and and
       exports their contents to the environment.

   /etc/rc.config
       The file is a script that sources all of the scripts, and also sources To read the  configuration  definitions,	only  this  file  need	be
       sourced.   This	file  is  sourced by whenever it is run, such as when the command is run to transition between run states.  Each file that
       exists in is sourced, without regard to which startup scripts are to be executed.

   /etc/rc.config.d
       The configuration information is structured as a directory of files, rather than as a single file containing the  same  information.   This
       allows  developers  to  create and manage their own configuration files here, without the complications of shared ownership and access of a
       common file.

   /etc/rc.config.d/* Files
       This is where files containing configuration variable assignments are located.

       Configuration scripts must be written to be read by the POSIX shell, and not the Bourne shell, or In some cases, these files must  also	be
       read  and  possibly modified by control scripts or the sam program.  See sd(4) and sam(1M).  For this reason, each variable definition must
       appear on a separate line, with the syntax:

       No trailing comments may appear on a variable definition line.  Comment statements must be on separate lines, with the comment character in
       column one.  This example shows the required syntax for configuration files:

       Configuration variables may be declared as array parameters when describing multiple instances of the variable configuration.  For example,
       a system may contain two network interfaces, each having a unique IP address and subnet mask (see ifconfig(1M)).  An example of such a dec-
       laration is as follows:

       Note  that  there  must	be  no requirements on the order of the files sourced.	This means configuration files must not refer to variables
       defined in other configuration files, since there is no guarantee that the variable being referenced is currently  defined.   There  is	no
       protection  against  environment variable namespace collision in these configuration files.  Programmers must take care to avoid such prob-
       lems.

   /etc/TIMEZONE
       The file contains the definition of the environment variable.  This file is required by POSIX.  It is sourced by at the same time the files
       are sourced.

SEE ALSO

       rc(1M).

																      rc.config(4)
All times are GMT -4. The time now is 08:52 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy