Add php_get_current_running_user() API

Author: ndossche

UPGRADING.INTERNALS

@@ -17,6 +17,8 @@ PHP 8.5 INTERNALS UPGRADE NOTES
 - Core
   . PG(arg_separator).input and PG(arg_separator).output are now `zend_string*`
     instead of `char*`.
+  . Added php_get_current_running_user() API to get the (effective) user
+    running the script.
 
 - Zend
   . Added zend_safe_assign_to_variable_noref() function to safely assign

main/main.c

@@ -1542,6 +1542,22 @@ static char *php_translate_uid_to_username(uid_t uid, size_t *len)
 }
 #endif
 
+PHPAPI char *php_get_current_running_user(size_t *len)
+{
+#ifdef PHP_WIN32
+	char *name = php_win32_get_username();
+	if (!name) {
+		return NULL;
+	}
+	*len = strlen(name);
+	char *result = estrndup(name, *len);
+	free(name);
+	return result;
+#else
+	return php_translate_uid_to_username(geteuid(), len);
+#endif
+}
+
 /* {{{ php_get_current_user */
 PHPAPI char *php_get_current_user(void)
 {

main/php.h

@@ -337,6 +337,7 @@ PHPAPI int php_register_internal_extensions(void);
 PHPAPI void php_register_pre_request_shutdown(void (*func)(void *), void *userdata);
 PHPAPI void php_com_initialize(void);
 PHPAPI char *php_get_current_user(void);
+PHPAPI char *php_get_current_running_user(size_t *len);
 
 PHPAPI const char *php_get_internal_encoding(void);
 PHPAPI const char *php_get_input_encoding(void);