Print help and version information on STDOUT.

[ssic.git] / src / ssic.pl

diff --git a/src/ssic.pl b/src/ssic.pl
old mode 100644 (file)
new mode 100755 (executable)
index c12ff21..2f3744e
--- a/src/ssic.pl
+++ b/src/ssic.pl
@@ -1,4 +1,19 @@
 #!/usr/bin/perl
+#
+# Copyright (C) 2013  Patrick "P. J." McDermott
+#
+# 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 of the License, 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, see <http://www.gnu.org/licenses/>.
 
 use strict;
 use warnings;
@@ -28,11 +43,11 @@ sub main
        }
 
        if (exists($opts{'h'})) {
-               help(*STDERR);
+               help(*STDOUT);
                exit(0);
        }
        if (exists($opts{'V'})) {
-               version(*STDERR);
+               version(*STDOUT);
                exit(0);
        }
 
@@ -105,34 +120,39 @@ sub compile
 {
        my ($input, $output, $vars, $root) = @_;
        my $input_fh;
+       my $input_abs;
        my $output_fh;
        my $ssi;
        my $var_name;
        my $var_value;
 
-       if ($input eq $output) {
-               error(4, "Input and output files are equal\n");
+       if ($input eq $output and $input ne "-") {
+               warning("Input and output files are equal\n");
        }
 
        if ($input eq "-") {
                $input_fh = *STDIN;
+               $input_abs = File::Spec->rel2abs(".");
        } else {
                if (not open($input_fh, "<", $input)) {
                        error(4, "%s: %s\n", $input, $!);
                }
+               $input_abs = File::Spec->rel2abs($input);
        }
        if ($output eq "-") {
                $output_fh = *STDOUT;
        } else {
-               if (not open($output_fh, ">", $output)) {
-                       error(4, "%s: %s\n", $output, $!);
+               if (not open($output_fh, ">", $output . "~")) {
+                       error(4, "%s: %s\n", $output . "~", $!);
                }
        }
 
+       # CGI::SSI uses SCRIPT_FILENAME to determine the value of LAST_MODIFIED.
        %ENV = (
                "DOCUMENT_NAME" => $input,
                "DOCUMENT_URI" => $input,
                "DOCUMENT_ROOT" => $root,
+               "SCRIPT_FILENAME" => $input_abs,
        );
 
        $CGI::SSI::DEBUG = 0;
@@ -147,6 +167,17 @@ sub compile
        }
 
        print($output_fh $ssi->process(<$input_fh>));
+
+       if ($input ne "-") {
+               close($input_fh);
+       }
+       if ($output ne "-") {
+               close($output_fh);
+       }
+
+       if (not rename($output . "~", $output)) {
+               error(4, "%s: %s\n", $output, $!);
+       }
 }
 
 main();