static int acm_tiocsetd(struct tty_struct *tty, int __user *p) { int ldisc; int ret; if (get_user(ldisc, p)) return -EFAULT; ret = tty_set_ldisc(tty, ldisc); return ret; }
/* Close down a terminal line. */ static int tty_close(void) { /* * Set the old discipline and restore the * previous line mode. */ (void) tty_set_ldisc(ldisc_before); (void) tty_restore(); (void) tty_lock(NULL, 0); return 0; }
static int spk_ttyio_initialise_ldisc(struct spk_synth *synth) { int ret = 0; struct tty_struct *tty; struct ktermios tmp_termios; dev_t dev; ret = get_dev_to_use(synth, &dev); if (ret) return ret; tty = tty_kopen(dev); if (IS_ERR(tty)) return PTR_ERR(tty); if (tty->ops->open) ret = tty->ops->open(tty, NULL); else ret = -ENODEV; if (ret) { tty_unlock(tty); return ret; } clear_bit(TTY_HUPPED, &tty->flags); /* ensure hardware flow control is enabled */ get_termios(tty, &tmp_termios); if (!(tmp_termios.c_cflag & CRTSCTS)) { tmp_termios.c_cflag |= CRTSCTS; tty_set_termios(tty, &tmp_termios); /* * check c_cflag to see if it's updated as tty_set_termios may not return * error even when no tty bits are changed by the request. */ get_termios(tty, &tmp_termios); if (!(tmp_termios.c_cflag & CRTSCTS)) pr_warn("speakup: Failed to set hardware flow control\n"); } tty_unlock(tty); ret = tty_set_ldisc(tty, N_SPEAKUP); if (ret) pr_err("speakup: Failed to set N_SPEAKUP on tty\n"); return ret; }
/* Open and initialize a terminal line. */ static int tty_open(char *name) { int fd; int ret; int saved_errno; char pathbuf[PATH_MAX]; register char *path_open, *path_lock; /* Try opening the TTY device. */ if (name != NULL) { if (name[0] != '/') { if (strlen(name + 6) > sizeof(pathbuf)) { fprintf(stderr, "tty name too long\n"); return -1; } sprintf(pathbuf, "/dev/%s", name); path_open = pathbuf; path_lock = name; } else if (!strncmp(name, "/dev/", 5)) { path_open = name; path_lock = name + 5; } else { path_open = name; path_lock = name; } fprintf(stderr, "tty_open: looking for lock\n"); if (tty_lock(path_lock, 1)) return -1 ; /* can we lock the device? */ fprintf(stderr, "tty_open: trying to open %s\n", path_open); if ((fd = open(path_open, O_RDWR|O_NDELAY)) < 0) { saved_errno = errno; fprintf(stderr, "tty_open(%s, RW): %s\n", path_open, strerror(errno)); return -saved_errno; } tty_fd = fd; fprintf(stderr, "tty_open: %s (fd=%d) ", path_open, fd); } else { tty_fd = 0; } /* Fetch the current state of the terminal. */ if (tty_get_state(&tty_before) < 0) { saved_errno = errno; fprintf(stderr, "tty_open: cannot get current state\n"); return -saved_errno; } tty_current = tty_before; /* Fetch the current line discipline of this terminal. */ if (tty_get_ldisc(&ldisc_before) < 0) { saved_errno = errno; fprintf(stderr, "tty_open: cannot get current line disc\n"); return -saved_errno; } /* Put this terminal line in a 8-bit transparent mode. */ if (tty_set_raw(&tty_current) < 0) { saved_errno = errno; fprintf(stderr, "tty_open: cannot set RAW mode\n"); return -saved_errno; } /************************************************** * The sensor needs to be setup at * 57600bps, 8 data bits, No parity, 1 stop bit: ************************************************** */ if (tty_set_speed(&tty_current, "57600") != 0) { saved_errno = errno; fprintf(stderr, "tty_open: cannot set data rate to 57600bps\n"); return -saved_errno; } if (tty_set_databits(&tty_current, "8") || tty_set_stopbits(&tty_current, "1") || tty_set_parity(&tty_current, "N")) { saved_errno = errno; fprintf(stderr, "tty_open: cannot set 8N1 mode\n"); return -saved_errno; }; /* Set the new line mode. */ if ((ret = tty_set_state(&tty_current)) < 0) return ret; /* And activate the new line discipline */ if ((ret = tty_set_ldisc(N_LUNIX_LDISC)) < 0) return ret; return 0; }
int tty_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg) { struct tty_struct * tty; struct tty_struct * other_tty; struct tty_struct * termios_tty; pid_t pgrp; int dev; int termios_dev; int retval; if (MAJOR(file->f_rdev) != TTY_MAJOR) { printk("tty_ioctl: tty pseudo-major != TTY_MAJOR\n"); return -EINVAL; } dev = MINOR(file->f_rdev); tty = TTY_TABLE(dev); if (!tty) return -EINVAL; if (IS_A_PTY(dev)) other_tty = tty_table[PTY_OTHER(dev)]; else other_tty = NULL; if (IS_A_PTY_MASTER(dev)) { termios_tty = other_tty; termios_dev = PTY_OTHER(dev); } else { termios_tty = tty; termios_dev = dev; } switch (cmd) { case TCGETS: retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (struct termios)); if (retval) return retval; memcpy_tofs((struct termios *) arg, termios_tty->termios, sizeof (struct termios)); return 0; case TCSETSF: case TCSETSW: case TCSETS: retval = check_change(termios_tty, termios_dev); if (retval) return retval; if (cmd == TCSETSF || cmd == TCSETSW) { if (cmd == TCSETSF) flush_input(termios_tty); wait_until_sent(termios_tty, 0); } return set_termios(termios_tty, (struct termios *) arg, termios_dev); case TCGETA: return get_termio(termios_tty,(struct termio *) arg); case TCSETAF: case TCSETAW: case TCSETA: retval = check_change(termios_tty, termios_dev); if (retval) return retval; if (cmd == TCSETAF || cmd == TCSETAW) { if (cmd == TCSETAF) flush_input(termios_tty); wait_until_sent(termios_tty, 0); } return set_termio(termios_tty, (struct termio *) arg, termios_dev); case TCXONC: retval = check_change(tty, dev); if (retval) return retval; switch (arg) { case TCOOFF: stop_tty(tty); break; case TCOON: start_tty(tty); break; case TCIOFF: if (STOP_CHAR(tty) != __DISABLED_CHAR) put_tty_queue(STOP_CHAR(tty), &tty->write_q); break; case TCION: if (START_CHAR(tty) != __DISABLED_CHAR) put_tty_queue(START_CHAR(tty), &tty->write_q); break; default: return -EINVAL; } return 0; case TCFLSH: retval = check_change(tty, dev); if (retval) return retval; switch (arg) { case TCIFLUSH: flush_input(tty); break; case TCIOFLUSH: flush_input(tty); /* fall through */ case TCOFLUSH: flush_output(tty); break; default: return -EINVAL; } return 0; case TIOCEXCL: set_bit(TTY_EXCLUSIVE, &tty->flags); return 0; case TIOCNXCL: clear_bit(TTY_EXCLUSIVE, &tty->flags); return 0; case TIOCSCTTY: if (current->leader && (current->session == tty->session)) return 0; /* * The process must be a session leader and * not have a controlling tty already. */ if (!current->leader || (current->tty >= 0)) return -EPERM; if (tty->session > 0) { /* * This tty is already the controlling * tty for another session group! */ if ((arg == 1) && suser()) { /* * Steal it away */ struct task_struct *p; for_each_task(p) if (p->tty == dev) p->tty = -1; } else return -EPERM; } current->tty = dev; tty->session = current->session; tty->pgrp = current->pgrp; return 0; case TIOCGPGRP: retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (pid_t)); if (retval) return retval; if (current->tty != termios_dev) return -ENOTTY; put_fs_long(termios_tty->pgrp, (pid_t *) arg); return 0; case TIOCSPGRP: retval = check_change(termios_tty, termios_dev); if (retval) return retval; if ((current->tty < 0) || (current->tty != termios_dev) || (termios_tty->session != current->session)) return -ENOTTY; pgrp = get_fs_long((pid_t *) arg); if (pgrp < 0) return -EINVAL; if (session_of_pgrp(pgrp) != current->session) return -EPERM; termios_tty->pgrp = pgrp; return 0; case TIOCOUTQ: retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (unsigned long)); if (retval) return retval; put_fs_long(CHARS(&tty->write_q), (unsigned long *) arg); return 0; case TIOCINQ: retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (unsigned long)); if (retval) return retval; if (L_ICANON(tty)) put_fs_long(inq_canon(tty), (unsigned long *) arg); else put_fs_long(CHARS(&tty->secondary), (unsigned long *) arg); return 0; case TIOCSTI: if ((current->tty != dev) && !suser()) return -EPERM; retval = verify_area(VERIFY_READ, (void *) arg, 1); if (retval) return retval; put_tty_queue(get_fs_byte((char *) arg), &tty->read_q); TTY_READ_FLUSH(tty); return 0; case TIOCGWINSZ: retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (struct winsize)); if (retval) return retval; memcpy_tofs((struct winsize *) arg, &tty->winsize, sizeof (struct winsize)); return 0; case TIOCSWINSZ: if (IS_A_PTY_MASTER(dev)) set_window_size(other_tty,(struct winsize *) arg); return set_window_size(tty,(struct winsize *) arg); case TIOCLINUX: switch (get_fs_byte((char *)arg)) { case 0: return do_screendump(arg); case 1: return do_get_ps_info(arg); #ifdef CONFIG_SELECTION case 2: return set_selection(arg); case 3: return paste_selection(tty); case 4: unblank_screen(); return 0; #endif /* CONFIG_SELECTION */ default: return -EINVAL; } case TIOCCONS: if (IS_A_CONSOLE(dev)) { if (!suser()) return -EPERM; redirect = NULL; return 0; } if (redirect) return -EBUSY; if (!suser()) return -EPERM; if (IS_A_PTY_MASTER(dev)) redirect = other_tty; else if (IS_A_PTY_SLAVE(dev)) redirect = tty; else return -ENOTTY; return 0; case FIONBIO: arg = get_fs_long((unsigned long *) arg); if (arg) file->f_flags |= O_NONBLOCK; else file->f_flags &= ~O_NONBLOCK; return 0; case TIOCNOTTY: if (current->tty != dev) return -ENOTTY; if (current->leader) disassociate_ctty(0); current->tty = -1; return 0; case TIOCGETD: retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (unsigned long)); if (retval) return retval; put_fs_long(tty->disc, (unsigned long *) arg); return 0; case TIOCSETD: retval = check_change(tty, dev); if (retval) return retval; arg = get_fs_long((unsigned long *) arg); return tty_set_ldisc(tty, arg); case TIOCGLCKTRMIOS: arg = get_fs_long((unsigned long *) arg); retval = verify_area(VERIFY_WRITE, (void *) arg, sizeof (struct termios)); if (retval) return retval; memcpy_tofs((struct termios *) arg, &termios_locked[termios_dev], sizeof (struct termios)); return 0; case TIOCSLCKTRMIOS: if (!suser()) return -EPERM; arg = get_fs_long((unsigned long *) arg); memcpy_fromfs(&termios_locked[termios_dev], (struct termios *) arg, sizeof (struct termios)); return 0; case TIOCPKT: if (!IS_A_PTY_MASTER(dev)) return -ENOTTY; retval = verify_area(VERIFY_READ, (void *) arg, sizeof (unsigned long)); if (retval) return retval; if (get_fs_long(arg)) { if (!tty->packet) { tty->packet = 1; tty->link->ctrl_status = 0; } } else tty->packet = 0; return 0; case TCSBRK: case TCSBRKP: retval = check_change(tty, dev); if (retval) return retval; wait_until_sent(tty, 0); if (!tty->ioctl) return 0; tty->ioctl(tty, file, cmd, arg); return 0; default: if (tty->ioctl) { retval = (tty->ioctl)(tty, file, cmd, arg); if (retval != -EINVAL) return retval; } if (ldiscs[tty->disc].ioctl) { retval = (ldiscs[tty->disc].ioctl) (tty, file, cmd, arg); return retval; } return -EINVAL; }
int tty_ioctl(struct inode * inode, struct file * file, unsigned int cmd, unsigned long arg) { struct tty_struct * tty; struct tty_struct * other_tty; struct tty_struct * termios_tty; int pgrp; int dev; int termios_dev; int retval; if (MAJOR(file->f_rdev) != 4) { printk("tty_ioctl: tty pseudo-major != 4\n"); return -EINVAL; } dev = MINOR(file->f_rdev); tty = TTY_TABLE(dev); if (!tty) return -EINVAL; if (IS_A_PTY(dev)) other_tty = tty_table[PTY_OTHER(dev)]; else other_tty = NULL; termios_tty = tty; termios_dev = dev; if (IS_A_PTY_MASTER(dev)) { termios_tty = other_tty; termios_dev = PTY_OTHER(dev); } switch (cmd) { case TCGETS: return get_termios(termios_tty,(struct termios *) arg); case TCSETSF: flush_input(tty); /* fallthrough */ case TCSETSW: wait_until_sent(tty); /* fallthrough */ case TCSETS: return set_termios(termios_tty,(struct termios *) arg, termios_dev); case TCGETA: return get_termio(termios_tty,(struct termio *) arg); case TCSETAF: flush_input(tty); /* fallthrough */ case TCSETAW: wait_until_sent(tty); /* fallthrough */ case TCSETA: return set_termio(termios_tty,(struct termio *) arg, termios_dev); case TCXONC: switch (arg) { case TCOOFF: tty->stopped = 1; TTY_WRITE_FLUSH(tty); return 0; case TCOON: tty->stopped = 0; TTY_WRITE_FLUSH(tty); return 0; case TCIOFF: if (STOP_CHAR(tty)) put_tty_queue(STOP_CHAR(tty), &tty->write_q); return 0; case TCION: if (START_CHAR(tty)) put_tty_queue(START_CHAR(tty), &tty->write_q); return 0; } return -EINVAL; /* not implemented */ case TCFLSH: if (arg==0) flush_input(tty); else if (arg==1) flush_output(tty); else if (arg==2) { flush_input(tty); flush_output(tty); } else return -EINVAL; return 0; case TIOCEXCL: return -EINVAL; /* not implemented */ case TIOCNXCL: return -EINVAL; /* not implemented */ case TIOCSCTTY: if ((current->leader && current->tty < 0 && tty->session == 0) || (arg == 1 && suser())) { current->tty = dev; tty->session = current->session; tty->pgrp = current->pgrp; return 0; } return -EPERM; case TIOCGPGRP: retval = verify_area(VERIFY_WRITE, (void *) arg,4); if (!retval) put_fs_long(termios_tty->pgrp,(unsigned long *) arg); return retval; case TIOCSPGRP: if ((current->tty < 0) || (current->tty != termios_dev) || (termios_tty->session != current->session)) return -ENOTTY; pgrp=get_fs_long((unsigned long *) arg); if (pgrp < 0) return -EINVAL; if (session_of_pgrp(pgrp) != current->session) return -EPERM; termios_tty->pgrp = pgrp; return 0; case TIOCOUTQ: retval = verify_area(VERIFY_WRITE, (void *) arg,4); if (!retval) put_fs_long(CHARS(&tty->write_q), (unsigned long *) arg); return retval; case TIOCINQ: retval = verify_area(VERIFY_WRITE, (void *) arg,4); if (retval) return retval; if (L_CANON(tty) && !tty->secondary.data) put_fs_long(0, (unsigned long *) arg); else put_fs_long(CHARS(&tty->secondary), (unsigned long *) arg); return 0; case TIOCSTI: return -EINVAL; /* not implemented */ case TIOCGWINSZ: return get_window_size(tty,(struct winsize *) arg); case TIOCSWINSZ: if (IS_A_PTY_MASTER(dev)) set_window_size(other_tty,(struct winsize *) arg); return set_window_size(tty,(struct winsize *) arg); case TIOCGSOFTCAR: return -EINVAL; /* not implemented */ case TIOCSSOFTCAR: return -EINVAL; /* not implemented */ case TIOCLINUX: switch (get_fs_byte((char *)arg)) { case 0: return do_screendump(arg); case 1: return do_get_ps_info(arg); default: return -EINVAL; } case TIOCCONS: if (IS_A_CONSOLE(dev)) { if (!suser()) return -EPERM; redirect = NULL; return 0; } if (redirect) return -EBUSY; if (!suser()) return -EPERM; if (IS_A_PTY_MASTER(dev)) redirect = other_tty; else if (IS_A_PTY_SLAVE(dev)) redirect = tty; else return -EINVAL; return 0; case FIONBIO: arg = get_fs_long((unsigned long *) arg); if (arg) file->f_flags |= O_NONBLOCK; else file->f_flags &= ~O_NONBLOCK; return 0; case TIOCNOTTY: if (MINOR(file->f_rdev) != current->tty) return -EINVAL; current->tty = -1; if (current->leader) { if (tty->pgrp > 0) kill_pg(tty->pgrp, SIGHUP, 0); tty->pgrp = -1; tty->session = 0; } return 0; case TIOCGETD: retval = verify_area(VERIFY_WRITE, (void *) arg,4); if (!retval) put_fs_long(tty->disc, (unsigned long *) arg); return retval; case TIOCSETD: arg = get_fs_long((unsigned long *) arg); return tty_set_ldisc(tty, arg); case TIOCPKT: { int on; if (!IS_A_PTY_MASTER(dev)) return -EINVAL; retval = verify_area(VERIFY_READ, (unsigned long *)arg, sizeof (int)); if (retval) return retval; on=get_fs_long ((unsigned long *)arg); if (on ) tty->packet = 1; else tty->packet = 0; return (0); } default: if (tty->ioctl) { retval = (tty->ioctl)(tty, file, cmd, arg); if (retval != -EINVAL) return retval; } if (ldiscs[tty->disc].ioctl) { retval = (ldiscs[tty->disc].ioctl) (tty, file, cmd, arg); return retval; } return -EINVAL; } }