#include<stdio.h>
#include<fcntl.h>
#include<sys/ioctl.h>

int main(){
	int fd = open("/proc/process_info", O_RDONLY);
	if(fd < 0)
		perror("open");
	for(unsigned int i = 0; i < 20; i++){
		printf("Testing %u:\n  ", i);
		long retval = ioctl(fd, 10, i);
		if(retval)
			perror("ioctl");
		printf("ioctl returned %ld\n", retval);
	}
	return 0;
}