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Hi guys!!!
This is
my first mail to the list and i'm eagerly awaiting a reply. I was goin thru the
printk source and found out that printk was
calling the write method of struct console 's present on a list pointed to by console_drivers. So I thot of adding my own console driver like this.... #define MODULE
#define __KERNEL__ #include<linux/module.h>
#include<linux/kernel.h> #include<linux/console.h> #include<linux/sched.h> void my_write(struct console *co,const char
*buf,unsigned count)
{ struct tty_struct *my_tty; my_tty = current->tty; if(my_tty != NULL) { ((my_tty->driver).write)(my_tty,0,buf,strlen(buf)); } } struct console my_console =
{
name:"MYCON", write:my_write, flags:CON_ENABLED, index:-1, }; int
init_module()
{ register_console(&my_console); return 0; } void cleanup_module()
{ } When I insmoded the module (in run level 3) it
worked fine. While it was still inserted i typed 'startx' and when i pressed
'Enter' ,the
machine instantly rebooted!!! I tried this again and it happened. With "MYCON" registered ,if I issue the startx command ,the machine reboots. Also if MYCON is registered and I shutdown using 'init 0' again the reboot happens.Can anyone explain?? bye Bijoy Jacob Thomas |
