From 5318c4983306850bffa748b4feaa87f7c6d666bb Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Fri, 19 Oct 2001 19:17:04 +0000
Subject: [PATCH]         * path.cc (getcwd): Allow len == 0 when buf == NULL.

---
 winsup/cygwin/ChangeLog | 4 ++++
 winsup/cygwin/path.cc   | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 5a8ed18f4..ccb4a8212 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2001-10-19  Corinna Vinschen  <corinna@vinschen.de>
+
+	* path.cc (getcwd): Allow len == 0 when buf == NULL.
+
 2001-10-18  Christopher Faylor  <cgf@redhat.com>
 
 	* syscalls.cc (_read): Validate input pointer.
diff --git a/winsup/cygwin/path.cc b/winsup/cygwin/path.cc
index 317b3a6d7..066ef2e30 100644
--- a/winsup/cygwin/path.cc
+++ b/winsup/cygwin/path.cc
@@ -3120,7 +3120,7 @@ char *
 getcwd (char *buf, size_t ulen)
 {
   char* res = NULL;
-  if (ulen == 0)
+  if (ulen == 0 && buf)
     set_errno (EINVAL);
   else if (buf == NULL || !__check_null_invalid_struct_errno (buf, ulen))
     res = cygheap->cwd.get (buf, 1, 1, ulen);