[SOLVED] Highlight matched pattern upon string

Faki · 03-28-2023, 06:21 AM

I would like to have a bash function that highlights a matched pattern upon a string.

Code:

cregex ()
 { 
  local ptrn="$1"
  local string="$2"
  
  local -r rst="$( tput sgr0 )"
  local -r blu="$( tput bold; tput setaf 39 )"
  
  echo "$string" | sed -E 's/$ptrn/${blu}${ptrn}${rst}/'
 }

But the function in not behaving as I would wish.

For instance

Code:

cregex "tput" "tput bold; tput setaf 39"

does not highlight the word "tput"

pan64 · 03-28-2023, 06:42 AM

grep --color tput <<<'erfa tput f r tput tput adf'

Faki · 03-28-2023, 06:58 AM

Would this allow a user to specify any pattern and any text, so that the matched text is highlighted? Would the use of "<<<" redirection suffer from code injection vulnerabilities?