1 /* 2 * Copyright (C) 2001 Jeff Dike (jdike@karaya.com) 3 * Licensed under the GPL 4 */ 5 6 #include <stdio.h> 7 #include <termios.h> 8 #include <errno.h> 9 #include <unistd.h> 10 #include "chan_user.h" 11 #include "user.h" 12 #include "os.h" 13 #include "um_malloc.h" 14 15 struct tty_chan { 16 char *dev; 17 int raw; 18 struct termios tt; 19 }; 20 21 static void *tty_chan_init(char *str, int device, const struct chan_opts *opts) 22 { 23 struct tty_chan *data; 24 25 if(*str != ':'){ 26 printk("tty_init : channel type 'tty' must specify " 27 "a device\n"); 28 return NULL; 29 } 30 str++; 31 32 data = kmalloc(sizeof(*data), UM_GFP_KERNEL); 33 if(data == NULL) 34 return NULL; 35 *data = ((struct tty_chan) { .dev = str, 36 .raw = opts->raw }); 37 38 return data; 39 } 40 41 static int tty_open(int input, int output, int primary, void *d, 42 char **dev_out) 43 { 44 struct tty_chan *data = d; 45 int fd, err; 46 47 fd = os_open_file(data->dev, of_set_rw(OPENFLAGS(), input, output), 0); 48 if(fd < 0) 49 return fd; 50 51 if(data->raw){ 52 CATCH_EINTR(err = tcgetattr(fd, &data->tt)); 53 if(err) 54 return err; 55 56 err = raw(fd); 57 if(err) 58 return err; 59 } 60 61 *dev_out = data->dev; 62 return fd; 63 } 64 65 const struct chan_ops tty_ops = { 66 .type = "tty", 67 .init = tty_chan_init, 68 .open = tty_open, 69 .close = generic_close, 70 .read = generic_read, 71 .write = generic_write, 72 .console_write = generic_console_write, 73 .window_size = generic_window_size, 74 .free = generic_free, 75 .winch = 0, 76 }; 77