# 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.
+ # 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);
+ if (fd != -1 && flock(fd, LOCK_EX) == 0) {
+ char *fd_s;
+ asprintf(&fd_s, "%i", fd);
+ setenv("IKIWIKI_CGILOCK_FD", fd_s, 1);
+ }
}
EOF
}