}
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
# the benefit of this optimisation.
$check_commit_hook=<<"EOF";
{
- int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR);
+ int fd=open("$config{wikistatedir}/commitlock", O_CREAT | O_RDWR, 0666);
if (fd != -1) {
if (flock(fd, LOCK_SH | LOCK_NB) != 0)
exit(0);
}
EOF
}
+ elsif ($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.
+ $pre_exec=<<"EOF";
+ {
+ int fd=open("$config{wikistatedir}/cgilock", O_CREAT | O_RDWR, 0666);
+ if (fd != -1)
+ flock(fd, LOCK_EX);
+ }
+EOF
+ }
$Data::Dumper::Indent=0; # no newlines
my $configstring=Data::Dumper->Dump([\%config], ['*config']);
exit(1);
}
+$pre_exec
execl("$this", "$this", NULL);
perror("exec $this");
exit(1);