Refactor, convert struct tty members to static strings

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/exec.c

@@ -363,7 +363,7 @@ pid_t run_getty(char *tty, char *baud, char *term, int noclear, int nowait, stru
 	if (!pid) {
 		speed_t speed = B38400;
 
-		if (baud) {
+		if (baud && baud[0]) {
 			speed = stty_parse_speed(baud);
 			if (B0 == speed)
 				logit(LOG_CRIT, "TTY %s: Invalid speed %s", tty, baud);

src/getty.c

@@ -237,7 +237,7 @@ int getty(char *tty, speed_t speed, char *term, char *user)
 	stty(fd, speed);
 	close(fd);
 
-	if (term)
+	if (term && term[0])
 		setenv("TERM", term, 1);
 
 	return do_login(name);

src/tty.c

@@ -238,9 +238,9 @@ int tty_register(char *line, struct rlimit rlimit[], char *file)
 		}
 	}
 
-	entry->name      = dev;
-	entry->baud      = baud ? strdup(baud) : NULL;
-	entry->term      = term ? strdup(term) : NULL;
+	strlcpy(entry->name, dev, sizeof(entry->name));
+	strlcpy(entry->baud, baud ? baud : "", sizeof(entry->baud));
+	strlcpy(entry->term, term ? term : "", sizeof(entry->term));
 	entry->noclear   = noclear;
 	entry->nowait    = nowait;
 	entry->nologin   = nologin;
@@ -290,12 +290,6 @@ int tty_unregister(struct tty *tty)
 
 	LIST_REMOVE(tty, link);
 
-	if (tty->name)
-		free(tty->name);
-	if (tty->baud)
-		free(tty->baud);
-	if (tty->term)
-		free(tty->term);
 	if (tty->cmd) {
 		int i;
 

src/tty.h

@@ -35,9 +35,9 @@
 struct tty {
 	LIST_ENTRY(tty) link;
 
-	char  *name;
-	char  *baud;
-	char  *term;
+	char   name[42];
+	char   baud[10];
+	char   term[10];
 	int    noclear;
 	int    nowait;
 	int    nologin;