Unix Helpers

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Revision as of 10:35, 7 January 2014 by Apos (talk | contribs) (Colored output)

grep

Colored output

Colered Output of a complete file. The regular expression "|$" matches those line that matches the pattern AND have an endline. This are ALL lines of the file!

egrep --color "pattern|$" file
grep --color -E "pattern|$" file
#!/bin/bash

regex="${1}"
color="${2}"
[ ${color} = "" ] && color=1  #defaults to green

# 1 green
# 3 red 
highlight_on=$(tput setaf 2) # green, use setab to do inverse instead of foreground
highlight_off=$(tput sgr0) # reset to standard color scheme

while read line
do
    $line =~ $regex  && echo -n $"$highlight_on"
    echo "$line$highlight_off" 
done