[hurd,commited] hurd getcwd: Allow unknown root directory

[hurd,commited] hurd getcwd: Allow unknown root directory

[Samuel Thibault]

To be efficient, the remap translator simply returns ports from the underlying
filesystem, and thus the root directory found through browsing '..' is the
underlying root, not the remap root. This should not be a reason for getcwd to
fail.

* sysdeps/mach/hurd/getcwd.c (_hurd_canonicalize_directory_name_internal): Do
not remove the heading slash if we got an unknown root directory.
(__getcwd): Do not fail with EGRATUITOUS if we got an unknown root directory.
---
 ChangeLog                  | 10 +++++++++-
 sysdeps/mach/hurd/getcwd.c | 12 ------------
 2 files changed, 9 insertions(+), 13 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index c3cae2a11e..d2ec5d5ac0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,12 @@
-2019-08-30  Richard Braun <rbraun@sceen.net>
+2019-08-30  Samuel Thibault  <samuel.thibault@ens-lyon.org>
+
+
+	* sysdeps/mach/hurd/getcwd.c
+	(_hurd_canonicalize_directory_name_internal): Do not remove the heading
+	slash if we got an unknown root directory. (__getcwd): Do not fail with
+	EGRATUITOUS if we got an unknown root directory.
+
+2019-08-30  Richard Braun  <rbraun@sceen.net>
 
 	* hurd/hurdselect.c (_hurd_select): Always call __io_select with no
 	timeout.
diff --git a/sysdeps/mach/hurd/getcwd.c b/sysdeps/mach/hurd/getcwd.c
index 93b7b1de58..7481ae9857 100644
--- a/sysdeps/mach/hurd/getcwd.c
+++ b/sysdeps/mach/hurd/getcwd.c
@@ -266,11 +266,6 @@ __hurd_canonicalize_directory_name_internal (file_t thisdir,
        So the root is our current directory.  */
     *--file_namep = '/';
 
-  if (thisid != rootid)
-    /* We did not get to our root directory. The returned name should
-       not begin with a slash.  */
-    ++file_namep;
-
   memmove (file_name, file_namep, file_name + size - file_namep);
   cleanup ();
   return file_name;
@@ -309,13 +304,6 @@ __getcwd (char *buf, size_t size)
     __USEPORT (CWDIR,
 	       __hurd_canonicalize_directory_name_internal (port,
 							    buf, size));
-  if (cwd && cwd[0] != '/')
-    {
-      /* `cwd' is an unknown root directory.  */
-      if (buf == NULL)
-	  free (cwd);
-      return __hurd_fail (EGRATUITOUS), NULL;
-    }
   return cwd;
 }
 weak_alias (__getcwd, getcwd)
-- 
2.23.0.rc1