blob: 429ae8e6c7e514f67fac718d9912828dec7e7768 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001#include <linux/init.h>
2#include <linux/console.h>
3
4#include "chan_user.h"
5
6/* ----------------------------------------------------------------------------- */
7/* trivial console driver -- simply dump everything to stderr */
8
9/*
10 * Don't register by default -- as this registeres very early in the
11 * boot process it becomes the default console. And as this isn't a
12 * real tty driver init isn't able to open /dev/console then.
13 *
14 * In most cases this isn't what you want ...
15 */
16static int use_stderr_console = 0;
17
18static void stderr_console_write(struct console *console, const char *string,
19 unsigned len)
20{
21 generic_write(2 /* stderr */, string, len, NULL);
22}
23
24static struct console stderr_console = {
Jeff Dikeda00d9a2005-06-08 15:48:01 -070025 .name = "stderr",
26 .write = stderr_console_write,
27 .flags = CON_PRINTBUFFER,
Linus Torvalds1da177e2005-04-16 15:20:36 -070028};
29
30static int __init stderr_console_init(void)
31{
32 if (use_stderr_console)
33 register_console(&stderr_console);
34 return 0;
35}
36console_initcall(stderr_console_init);
37
38static int stderr_setup(char *str)
39{
40 if (!str)
41 return 0;
42 use_stderr_console = simple_strtoul(str,&str,0);
43 return 1;
44}
45__setup("stderr=", stderr_setup);