| /* |
| * 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, const 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) |
| { |
| } |
| |
| const 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: |
| */ |