/* | |
* Copyright (C) 2001 Jeff Dike (jdike@karaya.com) | |
* Licensed under the GPL | |
*/ | |
#include <stdio.h> | |
#include <termios.h> | |
#include <errno.h> | |
#include <unistd.h> | |
#include "chan_user.h" | |
#include "user_util.h" | |
#include "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("tty_init : channel type 'tty' must specify " | |
"a device\n"); | |
return NULL; | |
} | |
str++; | |
data = um_kmalloc(sizeof(*data)); | |
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; | |
fd = os_open_file(data->dev, of_set_rw(OPENFLAGS(), input, output), 0); | |
if(fd < 0) | |
return fd; | |
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, | |
}; |