Fixed off-by-one overflow, updated test case

php_uv.c

@@ -4966,12 +4966,14 @@ PHP_FUNCTION(uv_exepath)
 */
 PHP_FUNCTION(uv_cwd)
 {
-	char buffer[1024] = {0};
-	size_t buffer_sz = sizeof(buffer);
-	
-	uv_cwd(buffer, buffer_sz);
-	buffer[buffer_sz] = '\0';
-	
+	char buffer[MAXPATHLEN];
+
+	if (zend_parse_parameters_none() == FAILURE) {
+		return;
+	}
+
+	uv_cwd(buffer, MAXPATHLEN);
+
 	RETURN_STRING(buffer, 1);
 }
 /* }}} */

tests/999-uv_chdir.phpt

@@ -2,7 +2,7 @@
 Check for uv_chdir
 --FILE--
 <?php
-@uv_chdir(); // don't SEGV
+uv_chdir(); // don't SEGV
 
 uv_chdir(dirname(__FILE__));
 if (uv_cwd() == dirname(__FILE__)) {
@@ -11,5 +11,7 @@ if (uv_cwd() == dirname(__FILE__)) {
   echo "FAILED: expected " . dirname(__FILE__) . ", but " . uv_cwd();
 }
 
---EXPECT--
-OK
+--EXPECTF--
+
+Warning: uv_chdir() expects exactly 1 parameter, 0 given in %s on line %d
+OK