X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/7b28deb171455a207e536b8abebbca67242a4588..5c418d269304af618b142e0328742fc7d7157c62:/IkiWiki/Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index 99237d3b5..31e30ad2e 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -44,6 +44,7 @@ EOF
 	}
 
 	my $check_commit_hook="";
+	my $pre_exec="";
 	if ($config{post_commit}) {
 		# Optimise checking !commit_hook_enabled() , 
 		# so that ikiwiki does not have to be started if the
@@ -58,7 +59,7 @@ EOF
 		# the benefit of this optimisation.
 		$check_commit_hook=<<"EOF";
 	{
-		int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR);
+		int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR, 0666);
 		if (fd != -1) {
 			if (flock(fd, LOCK_SH | LOCK_NB) != 0)
 				exit(0);
@@ -67,6 +68,23 @@ EOF
 	}
 EOF
 	}
+	elsif ($config{cgi}) {
+		# Avoid more than one ikiwiki cgi running at a time by
+		# taking a cgi lock. Since ikiwiki uses several MB of
+		# memory, a pile up of processes could cause thrashing
+		# otherwise. The fd of the lock is stored in
+		# IKIWIKI_CGILOCK_FD so unlockwiki can close it.
+		$pre_exec=<<"EOF";
+	{
+		int fd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666);
+		if (fd != -1 && flock(fd, LOCK_EX) == 0) {
+			char *fd_s;
+			asprintf(&fd_s, "%i", fd);
+			setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
+		}
+	}
+EOF
+	}
 
 	$Data::Dumper::Indent=0; # no newlines
 	my $configstring=Data::Dumper->Dump([\%config], ['*config']);
@@ -122,6 +140,7 @@ $envsave
 		exit(1);
 	}
 
+$pre_exec
 	execl("$this", "$this", NULL);
 	perror("exec $this");
 	exit(1);