Squash commits for public release

kernel/include/io/tty/tty.h

@@ -0,0 +1,88 @@
+#ifndef _KERNEL_IO_TTY_TTY_H
+#define _KERNEL_IO_TTY_TTY_H
+
+#include <algo/sync_ringbuffer.h>
+#include <fs/vfs.h>
+#include <libkern/types.h>
+
+#define TTY_MAX_COUNT 8
+#define TTY_BUFFER_SIZE 1024
+
+typedef unsigned char cc_t;
+typedef unsigned int speed_t;
+typedef unsigned int tcflag_t;
+
+#define NCCS 32
+struct termios {
+    tcflag_t c_iflag; // input mode flags
+    tcflag_t c_oflag; // output mode flags
+    tcflag_t c_cflag; // control mode flags
+    tcflag_t c_lflag; // local mode flags
+    cc_t c_cc[NCCS]; // control characters
+};
+typedef struct termios termios_t;
+
+/* c_cc characters */
+#define VINTR 0
+#define VQUIT 1
+#define VERASE 2
+#define VKILL 3
+#define VEOF 4
+#define VTIME 5
+#define VMIN 6
+#define VSWTC 7
+#define VSTART 8
+#define VSTOP 9
+#define VSUSP 10
+#define VEOL 11
+#define VREPRINT 12
+#define VDISCARD 13
+#define VWERASE 14
+#define VLNEXT 15
+#define VEOL2 16
+
+/* c_lflag bits */
+#define ISIG 0000001
+#define ICANON 0000002
+#define ECHO 0000010
+#define ECHOE 0000020
+#define ECHOK 0000040
+#define ECHONL 0000100
+#define NOFLSH 0000200
+#define TOSTOP 0000400
+#define IEXTEN 0100000
+
+/* tcflow() and TCXONC use these */
+#define TCOOFF 0
+#define TCOON 1
+#define TCIOFF 2
+#define TCION 3
+
+/* tcflush() and TCFLSH use these */
+#define TCIFLUSH 0
+#define TCOFLUSH 1
+#define TCIOFLUSH 2
+
+/* tcsetattr uses these */
+#define TCSANOW 0
+#define TCSADRAIN 1
+#define TCSAFLUSH 2
+
+struct tty_entry {
+    sync_ringbuffer_t buffer;
+    int line_count;
+    gid_t pgid;
+    termios_t termios;
+};
+typedef struct tty_entry tty_entry_t;
+
+int tty_init(tty_entry_t* tty);
+int tty_clear(tty_entry_t* tty);
+
+bool tty_can_read(tty_entry_t* tty, file_t* file, size_t start);
+int tty_read(tty_entry_t* tty, file_t* file, void __user* buf, size_t start, size_t len);
+bool tty_can_write(tty_entry_t* tty, file_t* file, size_t start);
+int tty_write(tty_entry_t* tty, file_t* file, void __user* buf, size_t start, size_t len);
+int tty_ioctl(tty_entry_t* tty, file_t* file, uintptr_t cmd, uintptr_t arg);
+
+#endif // _KERNEL_IO_TTY_TTY_H