Fix microcom to set serial device's terminal correctly.

Can't use the same set_terminal() logic as ptys because it not displaying
data, it should just accurately copy it.

2 files changed, 15 insertions, 0 deletions

diff --git a/lib/lib.h b/lib/lib.h
index 150133b6..431ce5ad 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -337,6 +337,7 @@ int terminal_probesize(unsigned *xx, unsigned *yy);
 #define KEY_ALT (1<<18)
 int scan_key(char *scratch, int timeout_ms);
 int scan_key_getsize(char *scratch, int timeout_ms, unsigned *xx, unsigned *yy);
+void xsetspeed(struct termios *tio, int speed);
 int set_terminal(int fd, int raw, int speed, struct termios *old);
 void xset_terminal(int fd, int raw, int speed, struct termios *old);
 void tty_esc(char *s);
diff --git a/lib/tty.c b/lib/tty.c
index a6b4576a..b0d0c5d5 100644
--- a/lib/tty.c
+++ b/lib/tty.c
@@ -61,6 +61,20 @@ int terminal_probesize(unsigned *xx, unsigned *yy)
   return 0;
 }
 
+void xsetspeed(struct termios *tio, int speed)
+{
+  int i, speeds[] = {50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400,
+                    4800, 9600, 19200, 38400, 57600, 115200, 230400, 460800,
+                    500000, 576000, 921600, 1000000, 1152000, 1500000, 2000000,
+                    2500000, 3000000, 3500000, 4000000};
+
+  // Find speed in table, adjust to constant
+  for (i = 0; i < ARRAY_LEN(speeds); i++) if (speeds[i] == speed) break;
+  if (i == ARRAY_LEN(speeds)) error_exit("unknown speed: %d", speed);
+  cfsetspeed(tio, i+1+4081*(i>15));
+}
+
+
 // Reset terminal to known state, saving copy of old state if old != NULL.
 int set_terminal(int fd, int raw, int speed, struct termios *old)
 {