tty.h File Reference

#include <miniOS/types.h>

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Classes
struct	minios_termios
struct	minios_winsize

Macros
#define	TTY_LFLAG_ISIG   0x0001u
#define	TTY_LFLAG_ICANON   0x0002u
#define	TTY_LFLAG_ECHO   0x0008u
#define	VINTR   0
#define	VEOF   1
#define	TTY_NCCS   8
#define	TCGETS   0x5401UL
#define	TCSETS   0x5402UL
#define	TCSETSW   0x5403UL
#define	TCSETSF   0x5404UL
#define	TIOCSCTTY   0x540EUL
#define	TIOCGPGRP   0x540FUL
#define	TIOCSPGRP   0x5410UL
#define	TIOCGWINSZ   0x5413UL
#define	TIOCNOTTY   0x5422UL

Functions
void	tty_init (void)
	Sets up the canonical input ring buffer, initialises the default termios (c_lflag = ICANON|ECHO|ISIG, VINTR=^C, VEOF=^D), and sets the window size to SCREEN_ROWS x SCREEN_COLS. Must be called once during kernel boot before tty_keyboard_input() or tty_read() are used.
void	tty_keyboard_input (char c)
	In canonical mode (ICANON set): appends to the line buffer; on newline or VEOF flushes the complete line to the read buffer. In raw mode: writes directly to the read buffer. Echoes to vt_write_byte() if ECHO is set. Sends SIGINT to the foreground process group if ISIG is set and == VINTR. Called from the keyboard interrupt handler (IRQ1).
void	tty_inject_escape (const char *seq, int len)
int	tty_has_data (void)
int	tty_read (void *buf, uint32_t len, int nonblock)
	In canonical mode: blocks (or returns -EAGAIN if nonblock) until a complete line is available, then copies up to @len bytes. In raw mode: returns as many bytes as are immediately available up to @len.
int	tty_write (const void *buf, uint32_t len)
	Forwards each byte to vt_write_byte(), which handles ANSI/VT escape sequence parsing and VGA cell rendering.
int	tty_ioctl (uint64_t cmd, uint64_t arg)
	TCGETS: copies current termios to *arg. TCSETS/TCSETSW: copies termios from *arg into the kernel TTY state. TIOCGWINSZ: copies the window size (SCREEN_ROWS x SCREEN_COLS) to *arg. TIOCSCTTY/TIOCNOTTY: accepted (no-op in single-TTY kernel).
int	tty_isatty_fd (int fd)
	Returns 1 if the fd's vfs_file entry has ftype == VFS_FILE_TYPE_CHAR and device_type == VFS_DEVICE_TTY, 0 otherwise. Used by the isatty(3) Newlib stub.