1 files changed, 12 insertions, 1 deletions

diff --git a/src/sysdep.c b/src/sysdep.c
index 26d381f5796..8291a606bea 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -232,7 +232,18 @@ emacs_get_current_dir_name (void)
   bool use_libc = true;
 #  endif
   if (use_libc)
-    return get_current_dir_name ();
+    {
+      /* GNU/Linux get_current_dir_name can return a string starting
+         with "(unreachable)" (Bug#27871).  */
+      char *wd = get_current_dir_name ();
+      if (wd && ! (IS_DIRECTORY_SEP (*wd) || (*wd && IS_DEVICE_SEP (wd[1]))))
+        {
+          free (wd);
+          errno = ENOENT;
+          return NULL;
+        }
+      return wd;
+    }
 # endif
 
   char *buf;