어느부분이 잘못되었는지좀 봐주세요....

#include <stdio.h>
#include <unistd.h>
#include <string.h>
 
int main(int argc, char* argv[]){
 
	if (chroot("chroot/jail") == -1) {
		perror("error-1: ");
	}
 
	if (chdir("/") == -1) {
		perror("error-2: ");
	}
 
	int ret;
	ret = execl("/bin/ls","ls",NULL);
 
	printf("exit with %d\n",ret);
	return 0;
}