Тестовые примеры / ch7 / chmod

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>

void change_mode()

{

int flag = (S_IWGRP | S_IROTH | S_IXOTH);

struct stat statv;

if (stat("/usr/joe/funny.book",&statv))

perror("stat");

else

{

flag = (statv.st_mode & ~flag) | S_ISUID;

if (chmod ("usr/joe/funny.book", flag))

perror("chmod");

}

}