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diff --git a/contrib/lp2.in b/contrib/lp2.in
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+#!/usr/bin/env sh
+
+# lp2 --- print a document duplex on a simplex printer
+
+# Copyright 1999-2023 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+# 02110-1301, USA.
+
+# Author: Reuben Thomas <rrt@sc3d.org>
+# Shell version based on fixps by Akim Demaille
+
+set -e
+
+# Get the name of the program
+program=`echo $0 | sed 's#.*/##g'`
+
+# Local vars
+back=:		# Print the back side pages.
+front=:		# Print the front side pages.
+
+# The version/usage strings
+version="lp2 1.0 (@GNU_PACKAGE@ @VERSION@)
+Written by Reuben Thomas.
+
+Copyright (c) 2023 Reuben Thomas
+Based on fixps, copyright (c) 1998-2000 Akim Demaille
+This is free software; see the source for copying conditions.  There is NO
+warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
+
+usage="\
+Usage: $program [OPTIONS] FILE...
+Print a file duplex on a simplex printer.n First print the odd pages, then
+prompt the user to put the printed pages back in, then print the even pages
+in reverse order.
+
+
+Options:
+ -h, --help              display this help and exit
+ -V, --version           display version information and exit
+ -f, --front             print only the front pages (recto)
+ -b, --back              print only the back pages (verso)
+
+Report bugs to <bug-a2ps@gnu.org>"
+
+help="Try \`$program --help' for more information."
+
+# Parse command line arguments.
+option_without_arguments='vhqfb'
+
+# Push a token among the arguments that will be used to notice when
+# we ended options/arguments parsing.
+arg_sep="$$--$$"
+set dummy ${1+"$@"} "$arg_sep"
+shift
+while test "x$1" != "x$arg_sep"; do
+
+  # Handle --option=value by splitting apart and putting back on argv.
+  case "$1" in
+    --*=*)
+      opt=`echo "$1" | sed -e 's/=.*//'`
+      val=`echo "$1" | sed -e 's/[^=]*=//'`
+      shift
+      set dummy "$opt" "$val" ${1+"$@"}
+      shift
+      ;;
+
+    -[$option_without_arguments]?*)
+      # Prefix $1 with x to avoid running `echo -na' for instance.
+      opt=`echo "x$1" | sed -e 's/x-\(.\).*/-\1/'`
+      rest=`echo "x$1" | sed -e 's/x-.\(.*\)/-\1/'`
+      shift
+      set dummy "$opt" "$rest" ${1+"$@"}
+      shift
+      ;;
+
+    # This case needs to be protected so that the case `-??*' does
+    # not split long options without arguments
+    --*)
+      ;;
+
+    # This is an option with argument.  Split apart and put back on argv.
+    -??*)
+      opt=`echo "x$1" | sed -e 's/x-\(.\).*/-\1/'`
+      arg=`echo "x$1" | sed -e 's/x-.\(.*\)/\1/'`
+      shift
+      set dummy "$opt" "$arg" ${1+"$@"}
+      shift
+      ;;
+  esac
+
+  # Now, handle the options.  $1 is the option *only*.  If it has an
+  # argument, it is now necessarily in $2 etc.  Remember to shift
+  # when fetching an argument.
+  case "$1" in
+    -V | --v*) echo "$version"; exit 0;;
+    -h | --h*) echo "$usage"; exit 0;;
+    -b | --bac*) front= ; back=: ;;
+    -f | --fro*) front=: ; back= ;;
+
+    --) # What remains are not options.
+      shift
+      while test "x$1" != "x$arg_sep"; do
+        set dummy ${1+"$@"} "$1"
+        shift
+        shift
+      done
+      break;;
+
+    -*)
+      echo "$program: Unknown or ambiguous option \`$1'." >&2
+      echo "$program: Try \`--help' for more information." >&2
+      exit 1;;
+    *) set dummy ${1+"$@"} "$1"
+       shift
+       ;;
+  esac
+  shift
+done
+# Pop the token
+shift
+
+
+# Check the number of arguments.
+if test $# = 0; then
+   echo "$program: not enough arguments" 1>&2
+   echo "$help"  1>&2
+   exit 1
+fi
+
+for file in "$@"; do
+  if test -f "$file"; then
+     if test -n "$front"; then
+        lp -o page-set=odd "$file"
+     fi
+     if test -n "$front" && test -n "$back"; then
+        echo "Turn the paper over and press <Return>" 1>&2
+        read
+     fi
+     if test -n "$back"; then
+        lp -o page-set=even -o outputorder=reverse "$file"
+     fi
+  else
+    printf "$program: \`$file' could not be read\n" 1>&2
+  fi
+done