From d4c61b72813b880d86b316770f2e3819a6428202 Mon Sep 17 00:00:00 2001
From: joey <joey@0fa5a96a-9a0e-0410-b3b2-a0fd24251071>
Date: Thu, 15 Feb 2007 02:22:08 +0000
Subject: * Many changes to make ikiwiki very resistant to write failures  
 including out of disk space situations. ikiwiki should never leave  
 truncated files, and if the error occurs during a web-based file edit,   the
 user will be given an opportunity to retry.   Inspired by the many ways Moin
 Moin destroys itself when out of disk. :-) * Fix syslogging of errors.

---
 IkiWiki/UserInfo.pm | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

(limited to 'IkiWiki/UserInfo.pm')

diff --git a/IkiWiki/UserInfo.pm b/IkiWiki/UserInfo.pm
index 115a263ce..02c27991c 100644
--- a/IkiWiki/UserInfo.pm
+++ b/IkiWiki/UserInfo.pm
@@ -15,12 +15,19 @@ sub userinfo_retrieve () { #{{{
 sub userinfo_store ($) { #{{{
 	my $userinfo=shift;
 	
+	my $newfile="$config{wikistatedir}/userdb.new";
 	my $oldmask=umask(077);
-	my $ret=Storable::lock_store($userinfo, "$config{wikistatedir}/userdb");
+	my $ret=Storable::lock_store($userinfo, $newfile);
 	umask($oldmask);
+	if (defined $ret && $ret) {
+		if (! rename($newfile, "$config{wikistatedir}/userdb")) {
+			unlink($newfile);
+			$ret=undef;
+		}
+	}
 	return $ret;
 } #}}}
-	
+
 sub userinfo_get ($$) { #{{{
 	my $user=shift;
 	my $field=shift;
-- 
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