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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 15:20:36 -0700 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/um/drivers/null.c | |
download | blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz blackbird-op-linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
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 @@ +/* + * Copyright (C) 2002 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <stdlib.h> +#include <errno.h> +#include "chan_user.h" +#include "os.h" + +static int null_chan; + +static void *null_init(char *str, int device, struct chan_opts *opts) +{ + return(&null_chan); +} + +static int null_open(int input, int output, int primary, void *d, + char **dev_out) +{ + *dev_out = NULL; + return(os_open_file(DEV_NULL, of_rdwr(OPENFLAGS()), 0)); +} + +static int null_read(int fd, char *c_out, void *unused) +{ + return(-ENODEV); +} + +static void null_free(void *data) +{ +} + +struct chan_ops null_ops = { + .type = "null", + .init = null_init, + .open = null_open, + .close = generic_close, + .read = null_read, + .write = generic_write, + .console_write = generic_console_write, + .window_size = generic_window_size, + .free = null_free, + .winch = 0, +}; + +/* + * Overrides for Emacs so that we follow Linus's tabbing style. + * Emacs will notice this stuff at the end of the file and automatically + * adjust the settings for this buffer only. This must remain at the end + * of the file. + * --------------------------------------------------------------------------- + * Local variables: + * c-file-style: "linux" + * End: + */ |