Avoid wrong value from file-attributes on Linux kernel before 3.6

* dired.c (file_attributes): Handle unsupported fstat on O_PATH
descriptors.  (bug#29070)

1 files changed, 8 insertions, 1 deletions

diff --git a/src/dired.c b/src/dired.c
index 28d1cffb44c..239b1acd1fb 100644
--- a/src/dired.c
+++ b/src/dired.c
@@ -953,7 +953,14 @@ file_attributes (int fd, char const *name,
     {
       record_unwind_protect_int (close_file_unwind, namefd);
       if (fstat (namefd, &s) != 0)
-        err = errno;
+        {
+          err = errno;
+          /* The Linux kernel before version 3.6 does not support
+             fstat on O_PATH file descriptors.  Handle this error like
+             missing support for O_PATH.  */
+          if (err == EBADF)
+            err = EINVAL;
+        }
       else
         {
           err = 0;