generator

#!/bin/bash
########################################################################
#
# generator
# $Id: generator,v 1.4 2024/02/22 18:25:39 elias Exp $
#
# Extract the generator-metatag from a web site.
# Requires GNU sed for the "i" modifier of sed. Yes, I know... ;)
# Requires bash for that strange $'\n' feature. Yes, I know... ;)
#
########################################################################

PATH=/bin:/usr/bin

rv=0
for i in "$@"
do
    echo -ne "$i\t"
    line=`curl -s "$i" |
          sed $'s/>/>\\\n/g' |
      grep -i \<meta |
      grep -i generator |
      sed 1q`
    if [ -z "$line" ]
    then
    echo "WARNING: no generator specified"
    rv=1
    else
    echo $line | sed "s/^.*content=['\"]\\([^'\"]*\\)['\"].*$/\\1/i"
    fi
done
exit $rv