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Copy pathtty.h
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170 lines (145 loc) · 4.02 KB
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#ifndef TTY_H
#define TTY_H
#include "kernel/fs.h"
#include "fs/dev.h"
struct winsize_ {
word_t row;
word_t col;
word_t xpixel;
word_t ypixel;
};
// This is the definition of __kernel_termios from glibc
struct termios_ {
dword_t iflags;
dword_t oflags;
dword_t cflags;
dword_t lflags;
byte_t line;
byte_t cc[19];
};
#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
#define ISIG_ (1 << 0)
#define ICANON_ (1 << 1)
#define ECHO_ (1 << 3)
#define ECHOE_ (1 << 4)
#define ECHOK_ (1 << 5)
#define ECHOKE_ (1 << 6)
#define NOFLSH_ (1 << 7)
#define ECHOCTL_ (1 << 9)
#define IEXTEN_ (1 << 15)
#define INLCR_ (1 << 6)
#define IGNCR_ (1 << 7)
#define ICRNL_ (1 << 8)
#define IXON_ (1 << 10)
#define OPOST_ (1 << 0)
#define ONLCR_ (1 << 2)
#define OCRNL_ (1 << 3)
#define ONOCR_ (1 << 4)
#define ONLRET_ (1 << 5)
#define TCGETS_ 0x5401
#define TCSETS_ 0x5402
#define TCSETSW_ 0x5403
#define TCSETSF_ 0x5404
#define TCFLSH_ 0x540b
#define TIOCSCTTY_ 0x540e
#define TIOCGPGRP_ 0x540f
#define TIOCSPGRP_ 0x5410
#define TIOCGWINSZ_ 0x5413
#define TIOCSWINSZ_ 0x5414
#define TIOCPKT_ 0x5420
#define TIOCGPTN_ 0x80045430
#define TIOCSPTLCK_ 0x40045431
#define TIOCGPKT_ 0x80045438
#define TCIFLUSH_ 0
#define TCOFLUSH_ 1
#define TCIOFLUSH_ 2
struct tty_driver {
const struct tty_driver_ops *ops;
int major;
struct tty **ttys;
unsigned limit;
};
#define DEFINE_TTY_DRIVER(name, driver_ops, _major, size) \
static struct tty *name##_ttys[size]; \
struct tty_driver name = {.ops = driver_ops, .major = _major, .ttys = name##_ttys, .limit = size}
struct tty_driver_ops {
int (*init)(struct tty *tty);
int (*open)(struct tty *tty);
int (*close)(struct tty *tty);
int (*write)(struct tty *tty, const void *buf, size_t len, bool blocking);
int (*ioctl)(struct tty *tty, int cmd, void *arg);
void (*cleanup)(struct tty *tty);
};
// indexed by major number
extern struct tty_driver *tty_drivers[256];
extern struct tty_driver real_tty_driver;
struct tty {
unsigned refcount;
struct tty_driver *driver;
bool hung_up;
bool ever_opened;
#define TTY_BUF_SIZE 4096
char buf[TTY_BUF_SIZE];
// A flag is a marker indicating the end of a canonical mode input. Flags
// are created by EOL and EOF characters. You can't backspace past a flag.
bool buf_flag[TTY_BUF_SIZE];
size_t bufsize;
uint8_t packet_flags;
cond_t produced;
cond_t consumed;
struct winsize_ winsize;
struct termios_ termios;
int type;
int num;
pid_t_ session;
pid_t_ fg_group;
struct list fds;
// only locks fds, to keep the lock order
lock_t fds_lock;
// this never nests with itself, except in pty_is_half_closed_master
lock_t lock;
union {
pthread_t thread; // for real tty driver
struct {
struct tty *other;
mode_t_ perms;
uid_t_ uid;
uid_t_ gid;
bool locked;
bool packet_mode;
} pty;
void *data;
};
};
// if blocking, may return _EINTR, otherwise, may return _EAGAIN
ssize_t tty_input(struct tty *tty, const char *input, size_t len, bool blocking);
void tty_set_winsize(struct tty *tty, struct winsize_ winsize);
void tty_hangup(struct tty *tty);
// public for the benefit of ptys
struct tty *tty_get(struct tty_driver *driver, int type, int num);
struct tty *tty_alloc(struct tty_driver *driver, int type, int num);
int tty_open(struct tty *tty, struct fd *fd);
extern lock_t ttys_lock;
void tty_release(struct tty *tty); // must be called with ttys_lock
extern struct dev_ops tty_dev;
extern struct dev_ops ptmx_dev;
int ptmx_open(struct fd *fd);
// Should call with a driver declared *without* DEFINE_TTY_DRIVER, as it overwrites the ttys field.
struct tty *pty_open_fake(struct tty_driver *driver);
#endif