pidfile_open
pidfile_open(const char *_path, mode_t _mode, pid_t *_pidptr);
if ((pfh = pidfile_open(pid_file, 0600, &pid)) == NULL) {
pfh = pidfile_open(_pidfile.c_str(), 0600, &otherpid);
pfh = pidfile_open(pidfile, 0644, NULL);
pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &mountdpid);
pfh = pidfile_open(_PATH_MOUNTDPID, 0600, &otherpid);
pidfh = pidfile_open(pidfile_path, 0600, &otherpid);
pidfh = pidfile_open(pidfile_path, 0600, &otherpid);
pfh = pidfile_open(pidfile, 600, NULL);
*pfh = pidfile_open(pidfile, 0600, &fpid);
*ppfh = pidfile_open(ppidfile, 0600, &fpid);
pidfile = pidfile_open(DEFAULT_PIDFILE_PATH, 0644, &pid);
pfh = pidfile_open(pidf, 0600, NULL);
pfh = pidfile_open(pidfilename, 0600, &otherpid);
pfh = pidfile_open(NULL, 600, NULL);
pfh = pidfile_open(PidFile, 0600, &spid);
pfh = pidfile_open(pidfilename, 600, NULL);