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");

		}

	}