Commit | Line | Data |
---|---|---|
cb8fa61c | 1 | /* |
e99525f9 | 2 | * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{linux.intel,addtoit}.com) |
1da177e4 LT |
3 | * Licensed under the GPL |
4 | */ | |
5 | ||
e99525f9 | 6 | #include <stdio.h> |
cb8fa61c JD |
7 | #include <stdlib.h> |
8 | #include <unistd.h> | |
1da177e4 | 9 | #include <errno.h> |
e99525f9 | 10 | #include <termios.h> |
1da177e4 | 11 | #include "chan_user.h" |
cb8fa61c JD |
12 | #include "kern_constants.h" |
13 | #include "os.h" | |
c13e5690 | 14 | #include "um_malloc.h" |
e99525f9 | 15 | #include "user.h" |
1da177e4 LT |
16 | |
17 | struct fd_chan { | |
18 | int fd; | |
19 | int raw; | |
20 | struct termios tt; | |
21 | char str[sizeof("1234567890\0")]; | |
22 | }; | |
23 | ||
5e7672ec | 24 | static void *fd_init(char *str, int device, const struct chan_opts *opts) |
1da177e4 LT |
25 | { |
26 | struct fd_chan *data; | |
27 | char *end; | |
28 | int n; | |
29 | ||
e99525f9 JD |
30 | if (*str != ':') { |
31 | printk(UM_KERN_ERR "fd_init : channel type 'fd' must specify a " | |
32 | "file descriptor\n"); | |
33 | return NULL; | |
1da177e4 LT |
34 | } |
35 | str++; | |
36 | n = strtoul(str, &end, 0); | |
e99525f9 JD |
37 | if ((*end != '\0') || (end == str)) { |
38 | printk(UM_KERN_ERR "fd_init : couldn't parse file descriptor " | |
39 | "'%s'\n", str); | |
40 | return NULL; | |
1da177e4 | 41 | } |
e99525f9 | 42 | |
43f5b308 | 43 | data = uml_kmalloc(sizeof(*data), UM_GFP_KERNEL); |
cb8fa61c | 44 | if (data == NULL) |
e99525f9 JD |
45 | return NULL; |
46 | ||
1da177e4 LT |
47 | *data = ((struct fd_chan) { .fd = n, |
48 | .raw = opts->raw }); | |
e99525f9 | 49 | return data; |
1da177e4 LT |
50 | } |
51 | ||
52 | static int fd_open(int input, int output, int primary, void *d, char **dev_out) | |
53 | { | |
54 | struct fd_chan *data = d; | |
55 | int err; | |
56 | ||
e99525f9 | 57 | if (data->raw && isatty(data->fd)) { |
1da177e4 | 58 | CATCH_EINTR(err = tcgetattr(data->fd, &data->tt)); |
e99525f9 JD |
59 | if (err) |
60 | return err; | |
1da177e4 LT |
61 | |
62 | err = raw(data->fd); | |
e99525f9 JD |
63 | if (err) |
64 | return err; | |
1da177e4 LT |
65 | } |
66 | sprintf(data->str, "%d", data->fd); | |
67 | *dev_out = data->str; | |
e99525f9 | 68 | return data->fd; |
1da177e4 LT |
69 | } |
70 | ||
71 | static void fd_close(int fd, void *d) | |
72 | { | |
73 | struct fd_chan *data = d; | |
74 | int err; | |
75 | ||
e99525f9 JD |
76 | if (!data->raw || !isatty(fd)) |
77 | return; | |
78 | ||
79 | CATCH_EINTR(err = tcsetattr(fd, TCSAFLUSH, &data->tt)); | |
80 | if (err) | |
81 | printk(UM_KERN_ERR "Failed to restore terminal state - " | |
82 | "errno = %d\n", -err); | |
83 | data->raw = 0; | |
1da177e4 LT |
84 | } |
85 | ||
5e7672ec | 86 | const struct chan_ops fd_ops = { |
1da177e4 LT |
87 | .type = "fd", |
88 | .init = fd_init, | |
89 | .open = fd_open, | |
90 | .close = fd_close, | |
91 | .read = generic_read, | |
92 | .write = generic_write, | |
fd9bc53b | 93 | .console_write = generic_console_write, |
1da177e4 LT |
94 | .window_size = generic_window_size, |
95 | .free = generic_free, | |
96 | .winch = 1, | |
97 | }; |