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| // SPDX-License-Identifier: GPL-2.0
| /*
| * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com)
| */
|
| #include <errno.h>
| #include <fcntl.h>
| #include <termios.h>
| #include "chan_user.h"
| #include <os.h>
| #include <um_malloc.h>
|
| struct tty_chan {
| char *dev;
| int raw;
| struct termios tt;
| };
|
| static void *tty_chan_init(char *str, int device, const struct chan_opts *opts)
| {
| struct tty_chan *data;
|
| if (*str != ':') {
| printk(UM_KERN_ERR "tty_init : channel type 'tty' must specify "
| "a device\n");
| return NULL;
| }
| str++;
|
| data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL);
| if (data == NULL)
| return NULL;
| *data = ((struct tty_chan) { .dev = str,
| .raw = opts->raw });
|
| return data;
| }
|
| static int tty_open(int input, int output, int primary, void *d,
| char **dev_out)
| {
| struct tty_chan *data = d;
| int fd, err, mode = 0;
|
| if (input && output)
| mode = O_RDWR;
| else if (input)
| mode = O_RDONLY;
| else if (output)
| mode = O_WRONLY;
|
| fd = open(data->dev, mode);
| if (fd < 0)
| return -errno;
|
| if (data->raw) {
| CATCH_EINTR(err = tcgetattr(fd, &data->tt));
| if (err)
| return err;
|
| err = raw(fd);
| if (err)
| return err;
| }
|
| *dev_out = data->dev;
| return fd;
| }
|
| const struct chan_ops tty_ops = {
| .type = "tty",
| .init = tty_chan_init,
| .open = tty_open,
| .close = generic_close,
| .read = generic_read,
| .write = generic_write,
| .console_write = generic_console_write,
| .window_size = generic_window_size,
| .free = generic_free,
| .winch = 0,
| };
|
|
