port.pt_names cannot be NULL; it always points to the static array ttys.
$ grep -rn pt_names
lib/port.c:157: port.pt_names = ttys;
lib/port.c:159: port.pt_names[j] = cp;
lib/port.c:172: port.pt_names[j] = NULL;
lib/port.c:344: for (i = 0; NULL != port->pt_names[i]; i++) {
lib/port.c:345: if (portcmp (port->pt_names[i], tty) == 0) {
lib/port.c:350: if (port->pt_names[i] == 0) {
lib/port.h:39: * pt_names - pointer to array of device names in /dev/
lib/port.h:45: char **pt_names;
Signed-off-by: Alejandro Colomar <alx@kernel.org>
setportent ();
while ((port = getportent ()) != NULL) {
- if ( (0 == port->pt_names)
- || (0 == port->pt_users)) {
+ if (NULL == port->pt_users)
continue;
- }
for (i = 0; NULL != port->pt_names[i]; i++) {
if (portcmp (port->pt_names[i], tty) == 0) {