X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/7ddea03684df47c861c264216b83e7653d6784fd..bac8bc027d4a1bb262300be2323ae4093c193e5b:/IkiWiki/Wrapper.pm

diff --git a/IkiWiki/Wrapper.pm b/IkiWiki/Wrapper.pm
index fd8a0e5b0..5427a5c80 100644
--- a/IkiWiki/Wrapper.pm
+++ b/IkiWiki/Wrapper.pm
@@ -8,7 +8,7 @@ use File::Spec;
 use Data::Dumper;
 use IkiWiki;
 
-sub gen_wrapper () { #{{{
+sub gen_wrapper () {
 	$config{srcdir}=File::Spec->rel2abs($config{srcdir});
 	$config{destdir}=File::Spec->rel2abs($config{destdir});
 	my $this=File::Spec->rel2abs($0);
@@ -28,19 +28,60 @@ sub gen_wrapper () { #{{{
 	my @envsave;
 	push @envsave, qw{REMOTE_ADDR QUERY_STRING REQUEST_METHOD REQUEST_URI
 	               CONTENT_TYPE CONTENT_LENGTH GATEWAY_INTERFACE
-		       HTTP_COOKIE REMOTE_USER HTTPS} if $config{cgi};
+		       HTTP_COOKIE REMOTE_USER HTTPS REDIRECT_STATUS
+		       REDIRECT_URL} if $config{cgi};
 	my $envsave="";
 	foreach my $var (@envsave) {
-		$envsave.=<<"EOF"
+		$envsave.=<<"EOF";
 	if ((s=getenv("$var")))
 		addenv("$var", s);
 EOF
 	}
+	
+	my @wrapper_hooks;
+	run_hooks(genwrapper => sub { push @wrapper_hooks, shift->() });
 
-	my $test_receive="";
-	if ($config{test_receive}) {
-		require IkiWiki::Receive;
-		$test_receive=IkiWiki::Receive::gen_wrapper();
+	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
+		# hook is disabled.
+		#
+		# Note that perl's flock may be implemented using fcntl
+		# or lockf on some systems. If so, and if there is no
+		# interop between the locking systems, the true C flock will
+		# always succeed, and this optimisation won't work.
+		# The perl code will later correctly check the lock,
+		# so the right thing will still happen, though without
+		# the benefit of this optimisation.
+		$check_commit_hook=<<"EOF";
+	{
+		int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR, 0666);
+		if (fd != -1) {
+			if (flock(fd, LOCK_SH | LOCK_NB) != 0)
+				exit(0);
+			close(fd);
+		}
+	}
+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
@@ -49,16 +90,16 @@ EOF
 	$configstring=~s/"/\\"/g;
 	$configstring=~s/\n/\\n/g;
 	
-	#translators: The first parameter is a filename, and the second is
-	#translators: a (probably not translated) error message.
-	open(OUT, ">$wrapper.c") || error(sprintf(gettext("failed to write %s: %s"), "$wrapper.c", $!));;
-	print OUT <<"EOF";
+	writefile(basename("$wrapper.c"), dirname($wrapper), <<"EOF");
 /* A wrapper for ikiwiki, can be safely made suid. */
 #include <stdio.h>
 #include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
 #include <unistd.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/file.h>
 
 extern char **environ;
 char *newenviron[$#envsave+6];
@@ -75,7 +116,8 @@ addenv(char *var, char *val) {
 int main (int argc, char **argv) {
 	char *s;
 
-$test_receive
+$check_commit_hook
+@wrapper_hooks
 $envsave
 	newenviron[i++]="HOME=$ENV{HOME}";
 	newenviron[i++]="WRAPPED_OPTIONS=$configstring";
@@ -93,15 +135,16 @@ $envsave
 		exit(1);
 	}
 
+$pre_exec
 	execl("$this", "$this", NULL);
 	perror("exec $this");
 	exit(1);
 }
 EOF
-	close OUT;
 
-	my $cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc';
-	if (system($cc, "$wrapper.c", "-o", "$wrapper.new") != 0) {
+	my @cc=exists $ENV{CC} ? possibly_foolish_untaint($ENV{CC}) : 'cc';
+	push @cc, possibly_foolish_untaint($ENV{CFLAGS}) if exists $ENV{CFLAGS};
+	if (system(@cc, "$wrapper.c", "-o", "$wrapper.new") != 0) {
 		#translators: The parameter is a C filename.
 		error(sprintf(gettext("failed to compile %s"), "$wrapper.c"));
 	}
@@ -125,6 +168,6 @@ EOF
 	#translators: The parameter is a filename.
 	printf(gettext("successfully generated %s"), $wrapper);
 	print "\n";
-} #}}}
+}
 
 1