Add socket_atmark unit test

Author: devnexen

ext/sockets/tests/socket_atmark.phpt

@@ -0,0 +1,53 @@
+--TEST--
+ext/sockets - socket_atmark
+--EXTENSIONS--
+sockets
+--SKIPIF--
+<?php
+
+if (PHP_OS_FAMILY !== 'Windows') die("skip not for Windows");
+--FILE--
+<?php
+include __DIR__."/mcast_helpers.php.inc";
+$path = sys_get_temp_dir() . "/socket_atmark.sock";
+
+@unlink($path);
+
+$string = "no chance of socket_atmark returning true";
+$len = strlen($string);
+$s_s = socket_create(AF_UNIX, SOCK_DGRAM, 0) or die("socket_create failed");
+socket_set_nonblock($s_s) or die("socket_set_nonblock");
+
+$s_c = socket_create(AF_UNIX, SOCK_DGRAM, 0) or die("socket_create failed");
+socket_bind($s_c, $path) or die("socket_bind failed");
+socket_set_nonblock($s_c) or die("socket_set_nonblock failed");
+socket_set_option($s_c, SOL_SOCKET, SO_PASSCRED, 1) or die("could not set SO_PASSCRED");
+$s_w = socket_sendto($s_s, $string, $len, 0, $path);
+if ($s_w != $len)
+    die("socket_send failed");
+checktimeout($s_c, 500);
+$data = [
+    "name" => [],
+    "buffer_size" => 2000,
+    "controllen" => socket_cmsg_space(SOL_SOCKET, SCM_CREDENTIALS)
+];
+
+if (socket_atmark($s_c) === FALSE) {
+    if (!socket_recvmsg($s_c, $data, 0))
+        die("socket_recvmsg failed");
+    echo "not OOB";
+} else {
+    $buf = "";
+    if (!socket_recv($s_c, $buf, 1, MSG_OOB) === FALSE)
+        die("socket_recv failed");
+    echo "OOB";
+}
+socket_close($s_c);
+socket_close($s_s);
+?>
+--CLEAN--
+<?php
+$path = sys_get_temp_dir() . "/socket_atmark.sock";
+@unlink($path);
+--EXPECT--
+not OOB