need help with wildcards

[yanivmomo]

I have a file within there is this sentence: "title dos". how could i know with if condition that this sentence exist in the file and it exactly as it should be. I dont have a problem if the line will end with whitespaces or tabs(this may happen if someone didn't write it right("title dos ").what i mean is how could i know the line is right and doesnt end with a letter that someone wrote in mistake
(for example:"title dos h"). I will be so glad if someone could help and send the exact answer.

[Irithori]

Hi,
if I understand the requirements right, then this should do:

egrep 'title dos([[:space:]]*)?$' filename

[yanivmomo]

i dont know how to put it in an if condition

[Irithori]

You are lucky, I was a bit bored, so I wrote it
Save that as "find_title_dos.sh",
make it executeable
and call it with your file as argument.

#!/bin/env bash

SEARCHSTRING="title dos"
EGREP=`which egrep`

if [ -z "$EGREP" ]; then
   echo "GNU egrep not found, exiting"
   exit 1;
fi

if [ -z "$1" -o ! -f "$1" ]; then
   echo "Usage: find_title_dos.sh [FILE]"
   exit 1
fi

OUTPUT=`$EGREP "$SEARCHSTRING" $1 |$EGREP -v "$SEARCHSTRING([[:space:]]*)?$"`
RC=$?

case "$RC" in
   0)
      echo "Warning: Found unwanted lines in file \"$1\":"
      echo "$OUTPUT"
      exit 1;
      ;;
   1)
      echo "File \"$1\" is ok"
      exit 0;
      ;;
   *)
      echo "Error in search"
      exit 1;
      ;;
esac

P.S.:
This script is a bit hack-ish, please check if the logic is good enough for your use case.
Especially that part about egrep *not* finding the pattern leading to "File is ok" is flacky.. :
If the file does not contain "title dos" at all, then the script will still tell "File is ok"

So, please adapt to your needs