182 checktty(const char *tty)  in checktty()  argument
188 	(void)strlcat(ttyfile, tty, sizeof(ttyfile));  in checktty()
203 makelock(char *buf, size_t bufsiz, const char *tty)  in makelock()  argument
206 	(void)strlcat(buf, tty, bufsiz);  in makelock()
212 ttylock(const char *tty, int flags, pid_t *locker)  in ttylock()  argument
216 	_DIAGASSERT(tty != NULL);  in ttylock()
218 	if (checktty(tty) != 0)  in ttylock()
222 	return pidlock(makelock(lockfile, sizeof(lockfile), tty),  in ttylock()
227 ttyunlock(const char *tty)  in ttyunlock()  argument
231 	_DIAGASSERT(tty != NULL);  in ttyunlock()
233 	if (checktty(tty) != 0)  in ttyunlock()
237 	return unlink(makelock(lockfile, sizeof(lockfile), tty));  in ttyunlock()