openat: fail with ENOENT on empty name

[gnulib.git] / lib / openat-proc.c

diff --git a/lib/openat-proc.c b/lib/openat-proc.c
index 8057033..76e1c6d 100644 (file)
--- a/lib/openat-proc.c
+++ b/lib/openat-proc.c
@@ -57,6 +57,13 @@ openat_proc_name (char buf[OPENAT_BUFFER_SIZE], int fd, char const *file)
 {
   static int proc_status = 0;
 
+  /* Make sure the caller gets ENOENT when appropriate.  */
+  if (!*file)
+    {
+      buf[0] = '\0';
+      return buf;
+    }
+
   if (! proc_status)
     {
       /* Set PROC_STATUS to a positive value if /proc/self/fd is