Flow control based on grep match pattern or string

[raajesh]

Hi,

Looking to create a flow control based on a string or pattern matched in a log file.

The log file may contain either of these

1 CONFSUCCESS
2 CONFFAIL
3 CONFPARTIAL

Example:
cat System.log

dsfasdfasfas
adfsfasfa
safafaf sdfaasfsa CONFSUCCESS
adsfasdfadsfadsf fafasfasdfasdf fafasfafsa
sadfafasfasdfadss fdsafadff fasfadfaf asff

So idea is to grep the message from log, based on pattern run a flow control as below.

if

1 Look in System.log - CONFSUCCESS - show message as - SUCCESSFUL - Ask user to - Press ENTER to continue

if

2 Look in System.log - CONFFAIL - show message as - FAILURE - Exit (come out of shell)

if

3 Look in System.log - CONFPARTIAL - Show message as - PARTIALSUCCESS - Exit (come out of shell)

Thanks

 

[DevynCJohnson]

Aloha and welcome to Linux.org! Feel free to ask any other questions about Linux here on this site. The main page displays the newest articles/tutorials. If you see a post that you like or found helpful, click "Like". If you ask a question and someone answers it to your satisfaction, click "Best Answer". Enjoy the site!

I can write a Python3 script that would do this more efficiently than a shell script.

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
import re
def cat(openfile): #Emulates the shell's cat command#
  with open(openfile) as file:
    lines = file.readlines()
    return ''.join(lines)
try:
  LOG = cat('System.log')
except:
  print('System.log not found or failed to open!')
  exit()
if re.search('CONFSUCCESS', LOG):
  print('SUCCESSFUL')
  VOIDVAR = input('Press ENTER to continue')
elif re.search('CONFFAIL', LOG):
  print('FAILURE')
  exit()
elif re.search('CONFPARTIAL', LOG):
  print('PARTIALSUCCESS')
  exit()
else: #If none of the three messages are found
  print('No message found or some unknown error occured')
  exit()