#!/usr/bin/perl -w
{
#   get_versions.pl.  Assumed installed in jgofsroot/* (most likely
#   jgofsroot/htmlbin).  WJS Aug 10

#   Does a strings | grep ersion of input arg.  Input arg comes from
#   command line or QUERY_STRING, in that order.  Input arg can be
#   relative file spec or program name or nothing.  If nothing,
#   program name defgb assumed.  If program name, program assumed to be 
#   in ../*/

 
  ($web_env = defined $ENV{'QUERY_STRING'}) && require ("cgi-lib.pl");

  ($program = $ARGV[0]) || ($program = $ENV{'QUERY_STRING'}) || ($program = "defgb");

  if ($program =~ q|/|) {
    ($program =~ q|^/|) && &quit ("Absolute file specs not allowed");
    $double_dot_count = ($program =~ s/\.\./\.\./g);
    ($double_dot_count > 1) && &quit ("Cannot examine programs outside jgofsroot");
  } else {
    $program = "../*/" . $program;
  }
  ($program =~ /^[\w\-\_\.\/\*]+$/) || &quit ("Illegal character in file spec $program");

  $! = $? = 0;
  $web_env && (print &PrintHeader()) && (print "<pre>");
  system ("strings $program | grep -i \" version \"");
  $web_env && ($? != 0) && (print "</pre>") &&
	&quit ("strings-piped-to-grep failed.  Most likely file $program not found");

  exit 0;
}

sub quit
{
  ($web_env) ? &CgiDie($_[0]) : die $_[0];
}