/* This function is async signal-safe, meaning that it's safe to call from
* inside a signal handler _unless_ execution was inside uv_tty_set_mode()'s
* critical section when the signal was raised.
*/
int uv_tty_reset_mode(void) {
int err;
if (!uv_spinlock_trylock(&termios_spinlock))
return -EBUSY; /* In uv_tty_set_mode(). */
err = 0;
if (orig_termios_fd != -1)
if (tcsetattr(orig_termios_fd, TCSANOW, &orig_termios))
err = -errno;
uv_spinlock_unlock(&termios_spinlock);
return err;
}
int uv_tty_set_mode(uv_tty_t* tty, int mode) {
struct termios raw;
int fd;
fd = uv__stream_fd(tty);
if (mode && tty->mode == 0) { /* on */
if (tcgetattr(fd, &tty->orig_termios))
return -errno;
/* This is used for uv_tty_reset_mode() */
uv_spinlock_lock(&termios_spinlock);
if (orig_termios_fd == -1) {
orig_termios = tty->orig_termios;
orig_termios_fd = fd;
}
uv_spinlock_unlock(&termios_spinlock);
raw = tty->orig_termios;
#ifdef _BSD_SOURCE
cfmakeraw(&raw);
#else
raw.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IXON);
raw.c_oflag &= ~OPOST;
raw.c_lflag &= ~(ECHO | ECHONL | ICANON | ISIG | IEXTEN);
raw.c_cflag &= ~(CSIZE | PARENB);
raw.c_cflag |= CS8;
#endif
raw.c_cc[VMIN] = 1;
raw.c_cc[VTIME] = 0;
/* Put terminal in raw mode after draining */
if (tcsetattr(fd, TCSADRAIN, &raw))
return -errno;
tty->mode = 1;
} else if (mode == 0 && tty->mode) { /* off */
/* Put terminal in original mode after flushing */
if (tcsetattr(fd, TCSAFLUSH, &tty->orig_termios))
return -errno;
tty->mode = 0;
}
return 0;
}
int uv_tty_set_mode(uv_tty_t* tty, uv_tty_mode_t mode) {
struct termios tmp;
int fd;
if (tty->mode == (int) mode)
return 0;
fd = uv__stream_fd(tty);
if (tty->mode == UV_TTY_MODE_NORMAL && mode != UV_TTY_MODE_NORMAL) {
if (tcgetattr(fd, &tty->orig_termios))
return -errno;
/* This is used for uv_tty_reset_mode() */
uv_spinlock_lock(&termios_spinlock);
if (orig_termios_fd == -1) {
orig_termios = tty->orig_termios;
orig_termios_fd = fd;
}
uv_spinlock_unlock(&termios_spinlock);
}
tmp = tty->orig_termios;
switch (mode) {
case UV_TTY_MODE_NORMAL:
break;
case UV_TTY_MODE_RAW:
tmp.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
tmp.c_oflag |= (ONLCR);
tmp.c_cflag |= (CS8);
tmp.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
tmp.c_cc[VMIN] = 1;
tmp.c_cc[VTIME] = 0;
break;
case UV_TTY_MODE_IO:
uv__tty_make_raw(&tmp);
break;
}
/* Apply changes after draining */
if (tcsetattr(fd, TCSADRAIN, &tmp))
return -errno;
tty->mode = mode;
return 0;
}
/* This function is async signal-safe, meaning that it's safe to call from
* inside a signal handler _unless_ execution was inside uv_tty_set_mode()'s
* critical section when the signal was raised.
*/
int uv_tty_reset_mode(void) {
int saved_errno;
int err;
saved_errno = errno;
if (!uv_spinlock_trylock(&termios_spinlock))
return UV_EBUSY; /* In uv_tty_set_mode(). */
err = 0;
if (orig_termios_fd != -1)
if (tcsetattr(orig_termios_fd, TCSANOW, &orig_termios))
err = UV__ERR(errno);
uv_spinlock_unlock(&termios_spinlock);
errno = saved_errno;
return err;
}
