出處：http://blog.csdn.net/cceczjxy/article/details/2584796
#include <linux/kd.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <errno.h>
#define NUMLOCK 0x02
#define CAPS 0X04
#define SCROLL 0X01
int main(int argc,char **argv)
{
int a=NUMLOCK;
char b=0;
if(argc==1)
{ printf(“usage /n./a.out – /n or usage /n ./a.out +/n”); return -1; }
ioctl(0,KDGKBLED,&a);//读取小键盘状态
ioctl(0,KDGETLED,&b);//读取键盘灯状态
if(argv[1][0]==’-‘)
{
a &= ~NUMLOCK;
a &=~CAPS;
a &=~SCROLL;
b &=~NUMLOCK;
b &=~CAPS;
b &=~SCROLL;
} else {
a |=NUMLOCK;
a |=CAPS;
a |=SCROLL;
b |=NUMLOCK;
b |=CAPS;
b |=SCROLL;
}
ioctl(0,KDSKBLED,a);//设置键盘状态
ioctl(0,KDSETLED,b);//设置键盘灯状态
}
只能在控制台模式下控制键盘灯及小键盘状态
gcc test.c -o test
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#define PACKAGE “Xnumlock”
#define VERSION “1.0”
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/extensions/XTest.h>
#include <X11/keysym.h>
#include <errno.h>
void usage( const char* argv0 )
{
printf( “NumLockX ” VERSION “/n” “Usage : %s [on|off]/n” “on – turns NumLock on in X ( default )/n” “off – turns NumLock off in X/n” “/n” , argv0 );
}
Display* dpy; int xtest_get_state(int key)
{
int i;
int numlock_mask = 0;
Window dummy1, dummy2;
int dummy3, dummy4, dummy5, dummy6;
unsigned int mask;
XModifierKeymap* map = XGetModifierMapping( dpy );
KeyCode numlock_keycode = XKeysymToKeycode( dpy, key );
if( numlock_keycode == NoSymbol )
return 0;
for( i = 0;i < 8;++i )
{
if( map->modifiermap[ map->max_keypermod * i ] == numlock_keycode ) numlock_mask = 1 << i;
}
XQueryPointer( dpy, DefaultRootWindow( dpy ), &dummy1, &dummy2,&dummy3, &dummy4, &dummy5, &dummy6, &mask );
XFreeModifiermap( map );
return mask & numlock_mask;
}
void xtest_change_on(int key)
{
errno=0;
XTestFakeKeyEvent( dpy, XKeysymToKeycode( dpy, key ), True, CurrentTime );
perror(“on”);
}
void xtest_change_off(int key)
{
errno=0;
XTestFakeKeyEvent( dpy, XKeysymToKeycode( dpy, key ), False, CurrentTime );
perror(“off”);
}
void set_on(int key)
{
if( !xtest_get_state(key))
xtest_change_on(key);
}
void set_off(int key)
{
if( xtest_get_state(key))
xtest_change_off(key);
}
int main( int argc, char* argv[] )
{
/*if( argc > 2 )
{
usage( argv[ 0 ] );
return 1;
}*/
int st;
dpy = XOpenDisplay( NULL );
if( dpy == NULL )
{
fprintf( stderr, “Error opening display!/n” );
return 1;
}
while(1)
{
//scanf(“%d”,&st);
//printf(“sd =%d/n”,st);
sleep(3);
if(st==1)
{
printf(“set_on/n”);
set_on(XK_Num_Lock);
set_off(XK_Caps_Lock);
st=0;
} else {
st=1;
printf(“set_off/n”);
set_off(XK_Num_Lock);
set_off(XK_Num_Lock);
set_off(XK_Num_Lock);
set_off(XK_Caps_Lock);
}
XCloseDisplay( dpy );
return 0;
}
在x11模式下控制小键盘状态及键盘灯(这个是转的别人的，试验了下，效果不太理想,set_off和set_on需要连续调用两三次才生效)
gcc -o Xtest test.c -lX11 -L/usr/X11R6/lib -lXext -lXtst
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仅仅控制键盘灯的,即可以在控制台模式，也可在x11模式
int num=2,scr=1,caps=4;
#define LED_CODE 0xED /* command to keyboard to set LEDs */
#define KEYBD 0x60
//argc[1] 1 2 4 3 5 6 7
int main(int argc,char **argv)
{
unsigned int leds;
ioperm(KEYBD,8,1);
//while(1)
//printf(“%d %d/n”,usleep(100000),inb(KEYBD)); //读键盘扫描码
if(argc==1)return;
leds=(scr<<0)|(num<<1)|(caps<<2);
leds=atoi(argv[1]); outb(LED_CODE, KEYBD);
outb(leds, KEYBD);//leds的第1,2,3位的值分别控制SCROll,NUM,CAPS
}