#!/usr/bin/perl

@W3M = split(' ', $ENV{'W3MMAN_W3M'} || 'w3m');
$ENV{'W3MMAN_MAN'} ||= '/usr/bin/man';
$SCRIPT = 'file:///$LIB/w3mman2html.cgi';

sub usage {
  ($_ = $0) =~ s@.*/@@;
  print STDERR "$_ [-M <path>] [[<section>] <command>]\n";
  print STDERR "$_ [-M <path>] [<section>] [-k <keyword>]\n";
  print STDERR "$_ [-l <file>]\n";
  exit 1;
}

$query = "";
while (@ARGV) {
  $_ = shift @ARGV;
  if (/^-M$/) {
    @ARGV || &usage();
    $ENV{'MANPATH'} = shift @ARGV;
  } elsif (/^-k$/) {
    @ARGV || &usage();
    if ( $query eq "" ) { $query = "?quit=ok"; }
    $query .= "&keyword=" . &form_encode(shift @ARGV);
  } elsif (/^-l$/ || /\//) {
    if (/^-l$/) {
      @ARGV || &usage(); 
      $_ = shift @ARGV;
    }
    $query = "?quit=ok&local=" . &form_encode($_);
    $query .= "&pwd=" . &form_encode($ENV{'PWD'});
  } elsif (/^-/) {
    &usage();
  } elsif ($query !~ /&section=/ && (/^\d/ || $_ eq 'n' || $_ eq 'l')) {
    if ( $query eq "" ) { $query = "?quit=ok"; }
    $query .= "&section=" . &form_encode($_);
  } else {
    if ( $query eq "" ) { $query = "?quit=ok"; }
    $query .= "&man=" . &form_encode($_);
  }
}
if ($query =~ /&section=/ && $query !~ /&keyword=/ && $query !~ /&man=/) {
  $query =~ s/&section=/&man=/;
}

exec @W3M, "$SCRIPT$query";

sub form_encode {
  local($_) = @_;
  s/[\000-\040\+:#?&%<>"\177-\377]/sprintf('%%%02X', unpack('C', $&))/eg;
  return $_;
}