HTTP_COOKIE REMOTE_USER HTTPS} if $config{cgi};
my $envsave="";
foreach my $var (@envsave) {
- $envsave.=<<"EOF"
+ $envsave.=<<"EOF";
if ((s=getenv("$var")))
addenv("$var", s);
EOF
$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
my $configstring=Data::Dumper->Dump([\%config], ['*config']);
$configstring=~s/\\/\\\\/g;
/* A wrapper for ikiwiki, can be safely made suid. */
#include <stdio.h>
#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
+#include <sys/file.h>
extern char **environ;
char *newenviron[$#envsave+6];
int main (int argc, char **argv) {
char *s;
+$check_commit_hook
$test_receive
$envsave
newenviron[i++]="HOME=$ENV{HOME}";
exit(1);
}
+$pre_exec
execl("$this", "$this", NULL);
perror("exec $this");
exit(1);