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#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>
#include <unistd.h>
#define SHM_SYNAPTICS 23947
typedef struct _SynapticsSHM {
int x, y;
int z; /* pressure value */
int w; /* finger width value */
int left, right, up, down; /* left/right/up/down buttons */
} SynapticsSHM;
static int is_equal(SynapticsSHM* s1, SynapticsSHM* s2)
{
return ((s1->x == s2->x) &&
(s1->y == s2->y) &&
(s1->z == s2->z) &&
(s1->w == s2->w) &&
(s1->left == s2->left) &&
(s1->right == s2->right) &&
(s1->up == s2->up) &&
(s1->down == s2->down));
}
int main() {
SynapticsSHM *synshm;
int shmid;
SynapticsSHM old;
if((shmid = shmget(SHM_SYNAPTICS, 0, 0)) == -1)
printf("shmget Fehler\n");
if((synshm = (SynapticsSHM*) shmat(shmid, NULL, 0)) == NULL)
printf("shmat Fehler\n");
while(1) {
SynapticsSHM cur = *synshm;
if (!is_equal(&old, &cur)) {
printf("x:%4d y:%4d z:%3d w:%2d left:%d right:%d up:%d down:%d\n",
cur.x, cur.y, cur.z, cur.w, cur.left, cur.right, cur.up, cur.down);
old = cur;
}
usleep(100000);
}
exit(0);
}
/* Local Variables: */
/* tab-width: 4 */
/* End: */
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