tty: tty abstraction initial implementation

kernel-src/include/kernel/devfs.h

@@ -9,7 +9,7 @@
 #define DEV_MAJOR_NULL 1
 #define DEV_MAJOR_FULL 2
 #define DEV_MAJOR_ZERO 3
-#define DEV_MAJOR_CONSOLE 4
+#define DEV_MAJOR_TTY 4
 #define DEV_MAJOR_FB 5
 #define DEV_MAJOR_KEYBOARD 6
 #define DEV_MAJOR_BLOCK 7
@@ -17,6 +17,7 @@
 #define DEV_MAJOR_URANDOM 9
 #define DEV_MAJOR_NET 10
 #define DEV_MAJOR_MOUSE 11
+#define DEV_MAJOR_CONSOLE 12
 
 typedef struct {
 	int (*open)(int minor, int flags);
@@ -29,6 +30,7 @@ typedef struct {
 	int (*isatty)(int minor);
 	int (*ioctl)(int minor, unsigned long request, void *arg, int *result);
 	int (*maxseek)(int minor, size_t *max);
+	void (*inactive)(int minor);
 } devops_t;
 
 typedef struct devnode_t {

kernel-src/include/kernel/tty.h

@@ -0,0 +1,33 @@
+#ifndef _TTY_H
+#define _TTY_H
+
+#include <mutex.h>
+#include <termios.h>
+#include <kernel/poll.h>
+#include <ringbuffer.h>
+
+#define DEVICE_BUFFER_SIZE 512
+#define READ_BUFFER_SIZE 4096
+
+typedef void (*ttydevicewritefn_t)(char *str, size_t size);
+
+typedef struct {
+	pollheader_t pollheader;
+	char *name;
+	ringbuffer_t readbuffer;
+	mutex_t readmutex;
+	mutex_t writemutex;
+	termios_t termios;
+	char *devicebuffer;
+	int devicepos;
+	ttydevicewritefn_t writetodevice;
+	int minor;
+	winsize_t winsize;
+} tty_t;
+
+void tty_init();
+tty_t *tty_create(char *name, ttydevicewritefn_t fn);
+void tty_destroy(char *name, tty_t *tty);
+void tty_process(tty_t *tty, char c);
+
+#endif