[PATCH] namespaces: utsname: use init_utsname when appropriate
[linux-2.6] / arch / um / drivers / tty.c
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_util.h"
12 #include "user.h"
13 #include "os.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 = um_kmalloc(sizeof(*data));
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 };