kernel: tty: Handle input processing better

- Fix copying logic in tty_read()
- Handle ICANON correctly
- Add ECHO c_lflag bit
- Add TTY_SOURCE_DEV and TTY_SOURCE_RAW defines

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 6 insertions, 1 deletions

diff --git a/sys/include/sys/termios.h b/sys/include/sys/termios.h
index 963c885..1fda67e 100644
--- a/sys/include/sys/termios.h
+++ b/sys/include/sys/termios.h
@@ -50,6 +50,7 @@
  * Local flags
  */
 #define ICANON 0x00000001U
+#define ECHO   0x00000002U
 
 typedef uint32_t tcflag_t;
 typedef uint32_t speed_t;
diff --git a/sys/include/sys/tty.h b/sys/include/sys/tty.h
index c53ea73..342a1a7 100644
--- a/sys/include/sys/tty.h
+++ b/sys/include/sys/tty.h
@@ -38,6 +38,9 @@
 
 #define TTY_RING_SIZE 32
 
+#define TTY_SOURCE_RAW 0x0001U   /* Raw text */
+#define TTY_SOURCE_DEV 0x0002U   /* Input from device (e.g keyboard) */
+
 struct tty_ring {
     char data[TTY_RING_SIZE];   /* Ring data */
     off_t enq_index;            /* Enqueue index */
@@ -48,6 +51,7 @@ struct tty {
     dev_t id;
     struct vcons_screen *scr;   /* Console screen */
     struct tty_ring ring;       /* Input ring */
+    struct tty_ring outring;    /* Output ring */
     struct spinlock rlock;      /* Ring lock */
     struct termios termios;     /* Termios structure */
     struct device *dev;         /* Device pointer */
@@ -56,7 +60,7 @@ struct tty {
 extern struct tty g_root_tty;
 
 dev_t tty_attach(struct tty *tty);
-int tty_putc(struct tty *tty, int c);
+int tty_putc(struct tty *tty, int c, int flags);
 int tty_putstr(struct tty *tty, const char *s, size_t count);
 ssize_t tty_flush(struct tty *tty);