diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/drivers/null.c |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/um/drivers/null.c')
-rw-r--r-- | arch/um/drivers/null.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/um/drivers/null.c b/arch/um/drivers/null.c new file mode 100644 index 000000000000..14cc5f78398a --- /dev/null +++ b/arch/um/drivers/null.c | |||
@@ -0,0 +1,56 @@ | |||
1 | /* | ||
2 | * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) | ||
3 | * Licensed under the GPL | ||
4 | */ | ||
5 | |||
6 | #include <stdlib.h> | ||
7 | #include <errno.h> | ||
8 | #include "chan_user.h" | ||
9 | #include "os.h" | ||
10 | |||
11 | static int null_chan; | ||
12 | |||
13 | static void *null_init(char *str, int device, struct chan_opts *opts) | ||
14 | { | ||
15 | return(&null_chan); | ||
16 | } | ||
17 | |||
18 | static int null_open(int input, int output, int primary, void *d, | ||
19 | char **dev_out) | ||
20 | { | ||
21 | *dev_out = NULL; | ||
22 | return(os_open_file(DEV_NULL, of_rdwr(OPENFLAGS()), 0)); | ||
23 | } | ||
24 | |||
25 | static int null_read(int fd, char *c_out, void *unused) | ||
26 | { | ||
27 | return(-ENODEV); | ||
28 | } | ||
29 | |||
30 | static void null_free(void *data) | ||
31 | { | ||
32 | } | ||
33 | |||
34 | struct chan_ops null_ops = { | ||
35 | .type = "null", | ||
36 | .init = null_init, | ||
37 | .open = null_open, | ||
38 | .close = generic_close, | ||
39 | .read = null_read, | ||
40 | .write = generic_write, | ||
41 | .console_write = generic_console_write, | ||
42 | .window_size = generic_window_size, | ||
43 | .free = null_free, | ||
44 | .winch = 0, | ||
45 | }; | ||
46 | |||
47 | /* | ||
48 | * Overrides for Emacs so that we follow Linus's tabbing style. | ||
49 | * Emacs will notice this stuff at the end of the file and automatically | ||
50 | * adjust the settings for this buffer only. This must remain at the end | ||
51 | * of the file. | ||
52 | * --------------------------------------------------------------------------- | ||
53 | * Local variables: | ||
54 | * c-file-style: "linux" | ||
55 | * End: | ||
56 | */ | ||