Script to process a list of items and uncomment lines with that item in a second file Post: 303042875

Sponsored Content

Top Forums Shell Programming and Scripting Script to process a list of items and uncomment lines with that item in a second file Post 303042875 by MadeInGermany on Thursday 9th of January 2020 04:51:46 AM

01-09-2020

Registered User

Or do all in bash - here is a well documented bash version:

Code:

#! /bin/bash
# bash v3 or higher

# file with list of items to find in modify_file
list_file=$1
# file for which a modified copy will be created
modify_file=$2
# final output file
new_file='new_'$modify_file

echo "reading values from '$list_file'"
# clear (and implicityly declare) an array
list=()
while read line
do
  echo "adding '$line' to list"
  list+=("$line")
done < $list_file

echo "reading '$modify_file'"
# loop through all the lines in the list_file
while IFS= read -r line <&3
do
   # look for the value in the current line
   # if the value is found on a line, print the substring of $0 skipping the first character
   # otherwise just print the line

   echo "processing line $((++linecnt))"
    # preset the new line
   outline=$line
   # loop through the array values
   for i in "${list[@]}"
   do
      look_for="'$i'"
      # =~ is ERE match, == is glob match
      # $look_for in quotes --> do not interpret special characters in it
      #if [[ $line =~ "$look_for" ]]
      if [[ $line == *"$look_for"* ]]
      then
         outline=${line:1}
         # further matches will do the same, so we can break the loop here
         break
      fi
   done
   # print the new line
   printf "%s\n" "$outline" >&4
done 3< "$modify_file" 4> "$new_file"

Last edited by MadeInGermany; 01-09-2020 at 06:09 AM.. Reason: break added, cosmetic changes

This User Gave Thanks to MadeInGermany For This Post:

MadeInGermany

View Public Profile for MadeInGermany

Find all posts by MadeInGermany

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

retrieve what the currently selected item is in a dropdown select list using perl tk

I have a dropdown menu built in perl tk (I am using active state perl). I want to select a value from the dropdown menu and I want to be able to perform some other actions depending upon what value is selected. I have all the graphical part made but I dont know how to get the selected value. Any...

2. Shell Programming and Scripting

comment and uncomment a line with Shell Script

Requirement is: 1. comment and uncomment the line with Shell Script: /opt/admin/fastpg/bin/fastpg.exe -c -=NET (using fastpg.exe as a search option) 2. display = "Commented" (when its commented) and display = "Uncommented" (when its uncommented) Its urgent, please let me asap!!! Thanks in...

3. Shell Programming and Scripting

Help needed regarding first 3 items in the list

Hi, I've a list in the following format: Empdept filedetails buildingNo Area AAA 444 2 juy AAA 544 2 kui AAA 567 4 poi AAA 734 5 oiu AAA 444 ...

4. Shell Programming and Scripting

List content of item in the combobox

I have a combo.cgi here. this is linux environment What i am going to do is this combobox will list down all the flatfile name in this /u/test/cgi-bin/List directory. after that, i wanted it to open the flatfile and display the content of the flatfile into another listbox or textarea in this page...

5. Shell Programming and Scripting

[Perl] Split lines into array - variable line items - variable no of lines.

Hi, I have the following lines that I would like to see in an array for easy comparisons and printing: Example 1: field1,field2,field3,field4,field5 value1,value2,value3,value4,value5Example 2: field1,field3,field4,field2,field5,field6,field7...

6. Shell Programming and Scripting

Removing lines from a file being used by another process using SHELL script

Hi All, Need a small help in writing a shell script which can delete a few lines from a file which is currently being used by another process. File gets appended using tee -a command due to which its size is getting increased. Contents like : 25/09/2012 05:18 Run ID:56579677-1 My...

7. UNIX for Dummies Questions & Answers

Easiest way to comment/uncomment a shell script?

cd path line1 line2 line3 line4 line5 Lets say thats the sample script...So say if i have to comment the above script, which would be the better way so that whenever i want, i cud comment or uncomment the same. Thanks

8. Shell Programming and Scripting

Need help with a script to grep items in one file from another file

I have one master file "File1" with all such info in it. I need to grep each object under each list from another file "File2". Can anyone help me with a script for this. File 1 ------ List 1 Object 1 Object 2 List 2 Object 3 Object 1 List 3 Object 2 ...

9. Shell Programming and Scripting

Read a lis, find items in a file from the list, change each item

Hello, I have some tab delimited text data, file: final_temp1 aname val NAME;r'(1,) 3.28584 r'(2,)<tab> NAME;r'(3,) 6.13003 NAME;r'(4,) 4.18037 r'(5,)<tab> You can see that the data is incomplete in some cases. There is a trailing tab after the first column for each incomplete row. I...

10. Shell Programming and Scripting

Pass an array to awk to sequentially look for a list of items in a file

Hello, I need to collect some statistical results from a series of files that are being generated by other software. The files are tab delimited. There are 4 different sets of statistics in each file where there is a line indicating what the statistic set is, followed by 5 lines of values. It...

LEARN ABOUT DEBIAN

powerman.conf

powerman.conf(5)						     powerman							  powerman.conf(5)

NAME

       powerman.conf - configuration file for PowerMan

DESCRIPTION

       The  powerman.conf  file  typically  includes  one  or more of the remote power controller (RPC) device files provided in the /etc/powerman
       directory; sets a few global options; instantiates RPC devices with unique names, hostnames, and ports; and maps node names  to	RPC's  and
       plug numbers.

       Network-attached RPC's are instantiated with device lines of the form:

	      device "name" "type" "host:port"

       Serial-attached RPC's are instantiated with device lines of the form:

	      device "name" "type" "special file" "flags"

       where  special file is the full path to a tty device, and flags is a serial parameter specification in a form similar to that used by lilo,
       e.g.  "9600,8n1".  RPC's that are accessed via coprocesses are instantiated as follows:

	      device "name" "type" "process |&"

       where process is the full path to a process whose standard output and input will be controlled by powerman,  e.g.  "/usr/bin/conman  -Q	-j
       rpc0 |&".

EXAMPLE

       The following example is a 16-node cluster that uses two 8-plug Baytech RPC-3 remote power controllers.

       include "/etc/powerman/baytech.dev"  # include def for "baytech" RPC

       tcpwrappers yes			    # enable TCP wrappers

       # listen "0.0.0.0:10101" 	    # uncomment to listen on all interfaces

       # Alias example - alias can be used in target specifications
       alias "pengra_service" "pengra[0-1]"
       alias "pengra_compute" "pengra[2-15]"

       # Power controller: device <name> <type> <hostname:port> [<flags>]
       device "pow0" "baytech" "pow0:23"  # instantiate pow0
       device "pow1" "baytech" "pow1:23"  # instantiate pow1

       # Plugs: node <name> <device> [<plug>]
       node "pengra[0-7]" "pow0" "[1-8]"  # map pengra0...pengra7 to pow0 plug 1-8
       node "pengra[8-15]" "pow1" "[1-8]" # map pengra8...pengra15 to pow1 plug 1-8

FILES

       /etc/powerman/powerman.conf
       /etc/powerman/*.dev

ORIGIN

       PowerMan was originally developed by Andrew Uselton on LLNL's Linux clusters.  This software is open source and distributed under the terms
       of the GNU GPL.

SEE ALSO

       powerman(1), powermand(8), httppower(8), plmpower(8), vpcd(8), powerman.conf(5), powerman.dev(5), powerman-devices(7).

       http://sourceforge.net/projects/powerman

powerman-2.3.5							    2009-02-09							  powerman.conf(5)