[glibc] hurd: Fix fdopendir checking for directory type

[Samuel Thibault]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=94884ff506d25ddca4f918c2cd40cc748bc5bbb3

commit 94884ff506d25ddca4f918c2cd40cc748bc5bbb3
Author: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date:   Thu May 28 10:13:14 2020 +0000

    hurd: Fix fdopendir checking for directory type
    
    * sysdeps/mach/hurd/fdopendir.c (__fdopendir): Lookup "./" instead of
    "/" that would designate the root of the filesystem.

Diff:
---
 sysdeps/mach/hurd/fdopendir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sysdeps/mach/hurd/fdopendir.c b/sysdeps/mach/hurd/fdopendir.c
index f15801f141..0583cdca0f 100644
--- a/sysdeps/mach/hurd/fdopendir.c
+++ b/sysdeps/mach/hurd/fdopendir.c
@@ -39,7 +39,7 @@ __fdopendir (int fd)
   /* Ensure that it's a directory.  */
   error_t err = HURD_FD_PORT_USE
     (d, ({
-	file_t dir = __file_name_lookup_under (port, "/",
+	file_t dir = __file_name_lookup_under (port, "./",
 					       O_DIRECTORY | O_NOTRANS, 0);;
 	if (dir != MACH_PORT_NULL)
 	  __mach_port_deallocate (__mach_task_self (), dir);