#!/bin/bash

# 20250207 Durtal cleanscan.sh version 2

# Be sure to use the following format: ./cleanscan.sh filename

# The following two commands clean out the messages from the server
# the -i option ensures that operation occurs "in place" in the file.
# The dot (.) represents any character and the asterix repeats only
# to the end of the line because sed is a "line editor". Basically, 
# sed won't print the lines beginning with "3Sorry" or "Error". Not 
# printing is faster than deleting.

sed -n -i '/3Sorry.*/!p' $1
sed -n -i '/Error.*/!p' $1

# If a line has a name that is followed by a blank line, the follow awk 
# script removes both the lines while ensuring that the final line 
# gets printed even if it is not part of a match pair. "prev" is 
# a variable to hold the current line before moving to the next. 

awk 'NR==1 {prev=$0; next}
	prev ~ /^[^ ]+$/ && $0 == "" {prev=""; next}
	{if (prev != "") print prev; prev=$0}
	END {if (prev != "") print prev }' $1 > temp.txt && mv temp.txt $1