patch by Stuart Hughes <seh@zee2.com> and Guenter <lists@gknw.net> to make "0" a special baud rate for getty where it uses this as "leave baud rate unchanged"

1 files changed, 7 insertions, 1 deletions

diff --git a/loginutils/getty.c b/loginutils/getty.c
index 467316fb8..0398ea3f9 100644
--- a/loginutils/getty.c
+++ b/loginutils/getty.c
@@ -163,8 +163,14 @@ static void parse_speeds(struct options *op, char *arg)
         debug("entered parse_speeds\n");
         while ((cp = strsep(&arg, ",")) != NULL) {
                 op->speeds[op->numspeed] = bcode(cp);
-                if (op->speeds[op->numspeed] <= 0)
+                if (op->speeds[op->numspeed] < 0)
                         bb_error_msg_and_die("bad speed: %s", cp);
+                else if (op->speeds[op->numspeed] == 0) {
+                        struct termios tio;
+                        if (tcgetattr(1, &tio) != 0)
+                                bb_error_msg_and_die("auto baudrate detection failed");
+                        op->speeds[op->numspeed] = cfgetospeed(&tio);
+                }
                 op->numspeed++;
                 if (op->numspeed > MAX_SPEED)
                         bb_error_msg_and_die("too many alternate speeds");