This file is indexed.

/usr/lib/surfraw/w3link is in surfraw 2.2.9-1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

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#!/bin/sh
# $Id$
# elvis: w3link		-- Check web page links with the w3c linkchecker (validator.w3.org/checklink)
# ianb@erislabs.net 20040908
. surfraw || exit 1

w3_config_hook () {
def    SURFRAW_w3link_depth            -1
defyn  SURFRAW_w3link_summary           1
defyn  SURFRAW_w3link_hiderd            0
defyn  SURFRAW_w3link_dhiderd           0
defyn  SURFRAW_w3link_noacceptlanguage  0
defyn  SURFRAW_w3link_recurse           0
defyn  SURFRAW_w3link_cookie            0
}

w3_usage_hook () {
    cat <<EOF
Usage: $w3_argv0 [options] [URL]
Description:
  Check web page links with the w3c linkchecker (validator.w3.org/checklink)
Local options:
  -r                            Check linked documents recursively.
                                Environment: SURFRAW_w3link_recurse
  -d=DEPTH                      Recursion depth.
                                Default: unlimited (-1)
                                Environment: SURFRAW_w3link_depth
  -s                            Summary only.
                                Environment: SURFRAW_w3link_summary
  -hiderd                       Hide Redirects.
                                Environment: SURFRAW_w3link_hiderd
  -dhiderd                      Hide Redirects for directories only.
                                Environment: SURFRAW_w3link_dhidedrd
  -nolang                       Don't send the Accept-Language: header.
                                Environment: SURFRAW_w3link_noacceptlanguage
  -cookie                       Save options in a cookie. 
                                Environment: SURFRAW_w3link_cookie
EOF
    w3_global_usage
}

w3_parse_option_hook () {
    opt="$1"
    optarg="$2"
    case "$opt" in
    -d*=*)    setopt    SURFRAW_w3link_depth    "$optarg" ;;
	-r)       setoptyn  SURFRAW_w3link_recurse          1 ;;
	-s)       setoptyn  SURFRAW_w3link_summary          1 ;;
	-hiderd)  setoptyn  SURFRAW_w3link_hiderd           1 ;;
	-dhiderd) setoptyn  SURFRAW_w3link_dhiderd          1 ;;
	-nolang)  setoptyn  SURFRAW_w3link_noacceptlanguage 1 ;;
	-cookie)  setoptyn  SURFRAW_w3link_cookie           1 ;;
	*) return 1 ;;
    esac
    return 0
}

w3_config
w3_parse_args "$@"
# w3_args now contains a list of arguments
if test -z "$w3_args"; then
    w3_browse_url "http://validator.w3.org/checklink"
else
    escaped_args=`w3_url_of_arg $w3_args`
	url="http://validator.w3.org/checklink?uri=${escaped_args}&depth=${SURFRAW_w3link_depth}"
	if [ $SURFRAW_w3link_recurse -eq 1 -o $SURFRAW_w3link_depth -ge 0 ]
	then
		url="${url}&recursive=on"
	fi
	if [ $SURFRAW_w3link_summary -eq 1 ]
	then
		url="${url}&summary=on"
	fi
	if [ $SURFRAW_w3link_noacceptlanguage -eq 1 ]
	then
		url="${url}&no_accept_language=on"
	fi

	if [ $SURFRAW_w3link_hiderd -eq 1 ]
	then
		url="${url}&hide_redirects=on&hide_type=all"
	elif [ $SURFRAW_w3link_dhiderd -eq 1 ]
	then
		url="${url}&hide_redirects=on&hide_type=dir"
	fi

	w3_browse_url "${url}"
fi