daemon: Fix bogus error message in read_pidfile() when pidfile is empty.

diff --git a/lib/daemon.c b/lib/daemon.c
index a3b824e6a9ef4b048f88e2bbbea154e1b52fccef..38cbc7b2ed940a3dc2c762e0eb2d9d22191b1549 100644 (file)
--- a/lib/daemon.c
+++ b/lib/daemon.c
@@ -278,8 +278,13 @@ read_pidfile(const char *pidfile)
     }
 
     if (!fgets(line, sizeof line, file)) {
-        error = errno;
-        VLOG_WARN("%s: read: %s", pidfile, strerror(error));
+        if (ferror(file)) {
+            error = errno;
+            VLOG_WARN("%s: read: %s", pidfile, strerror(error));
+        } else {
+            error = ESRCH;
+            VLOG_WARN("%s: read: unexpected end of file", pidfile);
+        }
         goto error;
     }