getcwd: fix too long pathnames bug

CHANGELOG

@@ -37,9 +37,12 @@ section "Removed interfaces".
 
 ** Issues fixed
 - MOP: fix problemes when redefining non-standard and anonymous classes
-
 Bugs identified and fixed by Pascal Costanza.
 
+- getcwd: fix issue with too long pathname
+This fixes the regression, which crashed ECL at start when pathname
+exceeded 128 characters limit.
+
 * 16.1.2 changes since 16.0.0
 
 ** API changes

src/c/unixfsys.d

@@ -158,7 +158,7 @@ current_dir(void) {
                 output = ecl_alloc_adjustable_base_string(size);
                 ecl_disable_interrupts();
                 ok = getcwd((char*)output->base_string.self, size);
-                if (ok == NULL && errno != ENAMETOOLONG) {
+                if (ok == NULL && errno != ERANGE) {
                         perror("ext::getcwd error");
                         ecl_internal_error("Can't work without CWD");
                 }