Commit | Line | Data |
---|---|---|
108ffa8c | 1 | /* |
e99525f9 | 2 | * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
1da177e4 | 6 | #include <errno.h> |
e99525f9 JD |
7 | #include <fcntl.h> |
8 | #include <termios.h> | |
1da177e4 | 9 | #include "chan_user.h" |
e99525f9 | 10 | #include "kern_constants.h" |
1da177e4 | 11 | #include "os.h" |
c13e5690 | 12 | #include "um_malloc.h" |
e99525f9 | 13 | #include "user.h" |
1da177e4 LT |
14 | |
15 | struct tty_chan { | |
16 | char *dev; | |
17 | int raw; | |
18 | struct termios tt; | |
19 | }; | |
20 | ||
5e7672ec | 21 | static void *tty_chan_init(char *str, int device, const struct chan_opts *opts) |
1da177e4 LT |
22 | { |
23 | struct tty_chan *data; | |
24 | ||
e99525f9 JD |
25 | if (*str != ':') { |
26 | printk(UM_KERN_ERR "tty_init : channel type 'tty' must specify " | |
1da177e4 | 27 | "a device\n"); |
108ffa8c | 28 | return NULL; |
1da177e4 LT |
29 | } |
30 | str++; | |
31 | ||
e4c4bf99 | 32 | data = kmalloc(sizeof(*data), UM_GFP_KERNEL); |
e99525f9 | 33 | if (data == NULL) |
108ffa8c | 34 | return NULL; |
1da177e4 LT |
35 | *data = ((struct tty_chan) { .dev = str, |
36 | .raw = opts->raw }); | |
108ffa8c JD |
37 | |
38 | return data; | |
1da177e4 LT |
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; | |
e99525f9 JD |
45 | int fd, err, mode = 0; |
46 | ||
47 | if (input && output) | |
48 | mode = O_RDWR; | |
49 | else if (input) | |
50 | mode = O_RDONLY; | |
51 | else if (output) | |
52 | mode = O_WRONLY; | |
1da177e4 | 53 | |
e99525f9 JD |
54 | fd = open(data->dev, mode); |
55 | if (fd < 0) | |
56 | return -errno; | |
108ffa8c | 57 | |
e99525f9 | 58 | if (data->raw) { |
1da177e4 | 59 | CATCH_EINTR(err = tcgetattr(fd, &data->tt)); |
e99525f9 | 60 | if (err) |
108ffa8c | 61 | return err; |
1da177e4 LT |
62 | |
63 | err = raw(fd); | |
e99525f9 | 64 | if (err) |
108ffa8c | 65 | return err; |
1da177e4 LT |
66 | } |
67 | ||
68 | *dev_out = data->dev; | |
108ffa8c | 69 | return fd; |
1da177e4 LT |
70 | } |
71 | ||
5e7672ec | 72 | const struct chan_ops tty_ops = { |
1da177e4 LT |
73 | .type = "tty", |
74 | .init = tty_chan_init, | |
75 | .open = tty_open, | |
76 | .close = generic_close, | |
77 | .read = generic_read, | |
78 | .write = generic_write, | |
fd9bc53b | 79 | .console_write = generic_console_write, |
1da177e4 LT |
80 | .window_size = generic_window_size, |
81 | .free = generic_free, | |
82 | .winch = 0, | |
83 | }; |