/usr/lib/surfraw/archpkg is in surfraw 2.2.9-1ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97  | #!/bin/sh
# elvis: archpkg		-- Search Arch Linux Packages (www.archlinux.org/packages/)
# Author: jason ryan • http://jasonwryan.com
. surfraw || exit 1
w3_config_hook () {
def   SURFRAW_arch_ix           "$SURFRAW_ix"
def   SURFRAW_arch_repo         "$SURFRAW_repo"
def   SURFRAW_arch_date         "$SURFRAW_date"
def   SURFRAW_arch_results       25
}
w3_usage_hook () {
    cat <<EOF
Usage: $w3_argv0 [options] [search string]
Description: Surfraw search Arch Linux packages (www.archlinux.org)
	Local options:
      -arch=ARCHITECTURES  | -a=ARCHITECTURES
		any        |   Any (default)
		i686       |   i686
		x86_64     |   x86_64
       -repo=REPOSITORIES  | -r=REPOSITORIES
		comm       |   Community
		commtest   |   Community-Testing
		core       |   Core
		extra      |   Extra
		multi      |   Multilib
		multitest  |   Multilib-Testing
		test       |   Testing
		               Default: All
	-date=UPDATED  | -d=UPDATED (format: YYYY-MM-DD)
	-num=NUMBER    |  Number of results per page
	                  Default: $SURFRAW_arch_results
EOF
    w3_global_usage
}
w3_parse_option_hook () {
    opt="$1"
    optarg="$2"
    case "$opt" in
	-a*=*)	setopt   SURFRAW_arch_ix        $optarg ;;
	-r*=*)	setopt   SURFRAW_arch_repo      $optarg ;;
	-d*=*)	setopt   SURFRAW_arch_date      $optarg ;;
	-n*=*)	setopt   SURFRAW_arch_results   $optarg ;;
	    *)	return 1 ;;
    esac
    return 0
}
w3_config
w3_parse_args "$@"
# selected repository
case "$SURFRAW_arch_repo" in
	comm)     repo="Community"         ;;
	commtest) repo="Community-Testing" ;;
	core)     repo="Core"              ;;
	extra)    repo="Extra"             ;;
	multi)    repo="Multilib"          ;;
	multitest)repo="Multilib-Testing"  ;;
	test)     repo="Testing"           ;;
	*)        repo=""                  ;;
esac
# no arguments present
if [ -z "$w3_args" ]; then
    w3_browse_url "http://www.archlinux.org/packages/"
else
# if w3_args contains a list of arguments
escaped_args=$(w3_url_of_arg $w3_args)
base="http://www.archlinux.org/packages/?sort="
	# repository and architecture
	if [ -n "$SURFRAW_arch_repo" -a "$SURFRAW_arch_ix" ]; then
	w3_browse_url "${base}&arch=${SURFRAW_arch_ix}&repo=${repo}&q=${escaped_args}&maintainer=&last_update=${SURFRAW_arch_date}&flagged=&limit=${SURFRAW_arch_results}"
	
	# check for repository
	elif [ -n "$SURFRAW_arch_repo" ]; then
	w3_browse_url "${base}&repo=${repo}&q=${escaped_args}&maintainer=&last_update=${SURFRAW_arch_date}&flagged=&limit=${SURFRAW_arch_results}"
	# just architecture
	elif [ -n "$SURFRAW_arch_ix" ]; then
	w3_browse_url "${base}&arch=${SURFRAW_arch_ix}&q=${escaped_args}&maintainer=&last_update=${SURFRAW_arch_date}&flagged=&limit=${SURFRAW_arch_results}"
	# none of the above...
	else
	w3_browse_url "${base}&q=${escaped_args}&maintainer=&last_update=${SURFRAW_arch_date}&flagged=&limit=${SURFRAW_arch_results}"
	fi
fi
 |