[LTP] [PATCH v7 2/2] connect01: Add negative tests

[Petr Vorel]

Hi Wei,

> Add negative cases for connect(), when errno is EPROTOTYPE or EACCES.
> These error paths were not exercised by the existing test.

...
> @@ -49,6 +62,10 @@ static struct test_case_t {
>  		"connect on a socket found no one listening on remote address"},
>  	{&fd_socket, &sock3, sizeof(sock3), EAFNOSUPPORT,
>  		"address doesn't have the correct address family in sa_family"},
> +	{&fd_unix_dgram, &sock4, sizeof(sock4), EPROTOTYPE,
> +		"socket type does not support the protocol"},
> +	{&fd_unix_stream, &sock4, sizeof(sock4), EACCES,
> +		"write permission is denied on the socket file"},
>  };

>  static int sys_connect(int sockfd, const struct sockaddr *addr,
> @@ -103,6 +120,19 @@ static void setup(void)
>  	sock3.sin_family = 47;
>  	sock3.sin_port = 0;
>  	sock3.sin_addr.s_addr = htonl(0x0AFFFEFD);
> +
> +	sock4.sun_family = AF_UNIX;
> +	strncpy(sock4.sun_path, SOCK_FILE, sizeof(sock4.sun_path));
> +
> +	fd_unix_server = SAFE_SOCKET(AF_UNIX, SOCK_STREAM, 0);
> +	SAFE_BIND(fd_unix_server, (struct sockaddr *)&sock4, sizeof(sock4));
> +	SAFE_CHMOD(SOCK_FILE, 0700);
> +	SAFE_LISTEN(fd_unix_server, 5);
> +
> +	fd_unix_dgram = SAFE_SOCKET(AF_UNIX, SOCK_DGRAM, 0);
> +	fd_unix_stream = SAFE_SOCKET(AF_UNIX, SOCK_STREAM, 0);
> +
> +	pw = SAFE_GETPWNAM("nobody");
>  }

...

> -	TST_EXP_FAIL(sys_connect(*tc->fd, addr, tc->salen),
> -		     tc->exp_errno, "%s", tc->desc);
> +	if (tc->exp_errno == EACCES) {
> +		if (!SAFE_FORK()) {
> +			SAFE_SETUID(pw->pw_uid);
> +			TST_EXP_FAIL(sys_connect(*tc->fd, addr, tc->salen),
> +				     tc->exp_errno, "%s", tc->desc);
> +			exit(0);
> +		}
> +		tst_reap_children();
> +	} else {
> +		TST_EXP_FAIL(sys_connect(*tc->fd, addr, tc->salen),
> +			     tc->exp_errno, "%s", tc->desc);
> +	}

This looks to me way complicated when put into an existing test. Wouldn't be
better to create to add them to a new file (connect03.c)? Please use the style I
introduced in connect01.c (designated initializers, errnos in doc, void =>
struct sockaddr_in, ...).

Kind regards,
Petr