Revise display of usage information

The script now reports success if run with the --help option.

diff --git a/gatekeeper.pl b/gatekeeper.pl
index 2f5ac6195be9e52432a4dcf7acc3dad5eb39d955..445d0eadd4050f15efa35ed434ef8e3fde3b20d3 100755 (executable)
--- a/gatekeeper.pl
+++ b/gatekeeper.pl
@@ -200,22 +200,24 @@ our $help;
 our $version;
 
 sub usage_information {
-  my $retval = "\n$NAME protocol v$VERSION ($DATE)\n";
-  $retval .= "More information at $URL\n";
-  $retval .= "\nERROR: You have not supplied all required parameters. $NAME takes these arguments:\n\n";
-  $retval .= " $NAME -s <style> [-d <debuglevel>] [-v] [-h]\n\n";
-  $retval .= "  <style>    is the execution 'style'. Call $NAME\n";
-  $retval .= "             without the -s parameter to get a list of possible styles.\n";
-  $retval .= "  -d <debuglevel> (optional) set debug level. 0 means no debugging\n";
-  $retval .= "  -v (optional)  display version information\n";
-  $retval .= "  -h (optional)  display this help screen\n\n";
-  $retval .= "Possible styles:\n\n";
-  $retval .= "  ftp\n";
-  $retval .= "  alpha\n";
-  $retval .= "  distros\n";
-  $retval .= "\n";
-  print $retval;
-  exit;
+  print "ERROR: You have not supplied all required parameters.\n\n"
+    unless $_[0];
+  print "$NAME protocol v$VERSION ($DATE)\nMore information at $URL\n";
+  print <<"END";
+
+ $NAME -s <style> [-d <debuglevel>] [-v] [-h]\n
+  <style>    is the execution 'style'. Call $NAME
+             without the -s parameter to get a list of possible styles.
+  -d <debuglevel> (optional) set debug level. 0 means no debugging
+  -v (optional)  display version information
+  -h (optional)  display this help screen\n
+Possible styles:\n
+  ftp
+  alpha
+  distros
+
+END
+  exit ((defined $_[0] && $_[0]) ? 0 : 1);
 }
 
 sub version_information {
@@ -228,11 +230,11 @@ sub version_information {
   print 'Running with @INC:', "\n";
   print "  $_\n" for @INC;
   print "\n";
-  exit;
+  exit 0;
 }
 
 version_information() if ($version);
-usage_information() if ($help);
+usage_information(1) if ($help);
 usage_information() if (($style ne 'ftp') && ($style ne 'alpha') && ($style ne 'distros'));
 
 my $m_style = 'ftp';