zdtm: Add sockets_spair test case

Code to test socketpair (extracted from
previous sockets00 test case).
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

test/zdtm.sh

@@ -28,6 +28,7 @@ transition/file_read
 transition/fork
 static/zombie00
 static/sockets00
+static/sockets_spair
 static/socket_queues
 static/pid00
 static/pstree

test/zdtm/live/static/Makefile

@@ -35,6 +35,7 @@ TST_NOFILE	=				\
 		utsname				\
 		pstree				\
 		sockets00			\
+		sockets_spair			\
 		socket_queues			\
 		ipc_namespace			\
 		selfexe00			\

test/zdtm/live/static/sockets_spair.c

+#define _GNU_SOURCE
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/wait.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <limits.h>
+#include <fcntl.h>
+
+#include "zdtmtst.h"
+
+const char *test_doc	= "Test unix stream socketpair\n";
+const char *test_author	= "Cyrill Gorcunov <gorcunov@openvz.org";
+
+#define SK_DATA "packet"
+
+int main(int argc, char *argv[])
+{
+	int ssk_pair[2];
+	char buf[64];
+
+	test_init(argc, argv);
+
+	if (socketpair(AF_UNIX, SOCK_STREAM, 0, ssk_pair) == -1) {
+		fail("socketpair\n");
+		exit(1);
+	}
+
+	memset(buf, 0, sizeof(buf));
+	write(ssk_pair[0], SK_DATA, sizeof(SK_DATA));
+	read(ssk_pair[1], &buf, sizeof(buf));
+	if (strcmp(buf, SK_DATA)) {
+		fail("data corrupted\n");
+		exit(1);
+	}
+	test_msg("stream            : '%s'\n", buf);
+
+	test_daemon();
+	test_waitsig();
+
+	memset(buf, 0, sizeof(buf));
+	write(ssk_pair[0], SK_DATA, sizeof(SK_DATA));
+	read(ssk_pair[1], &buf, sizeof(buf));
+	if (strcmp(buf, SK_DATA)) {
+		fail("data corrupted\n");
+		exit(1);
+	}
+	test_msg("stream            : '%s'\n", buf);
+
+	pass();
+	return 0;
+}