Add upstream patch to fix test error:

nbd_connect_unix: getlogin: No such device or address

0001-lib-Try-LOGNAME-before-using-getlogin_r.patch

@@ -0,0 +1,50 @@
+From e0b30bceab1cf61d8129b874d0122bc2cccec0e9 Mon Sep 17 00:00:00 2001
+From: "Richard W.M. Jones" <rjones@redhat.com>
+Date: Wed, 21 Aug 2019 09:57:54 +0100
+Subject: [PATCH] lib: Try $LOGNAME before using getlogin_r.
+
+Fixes tests in Koji which failed with
+nbd_connect_unix: getlogin: No such device or address
+---
+ lib/crypto.c | 18 ++++++++++++++++--
+ 1 file changed, 16 insertions(+), 2 deletions(-)
+
+diff --git a/lib/crypto.c b/lib/crypto.c
+index 703bc84..2a59943 100644
+--- a/lib/crypto.c
++++ b/lib/crypto.c
+@@ -102,7 +102,7 @@ nbd_unlocked_set_tls_username (struct nbd_handle *h, const char *username)
+ char *
+ nbd_unlocked_get_tls_username (struct nbd_handle *h)
+ {
+-  char *ret;
++  char *s, *ret;
+ 
+   if (h->tls_username) {
+     ret = strdup (h->tls_username);
+@@ -113,7 +113,21 @@ nbd_unlocked_get_tls_username (struct nbd_handle *h)
+     return ret;
+   }
+ 
+-  /* Otherwise we return the local login name. */
++  /* Otherwise we return the local login name.  Try $LOGNAME first for
++   * two reasons: (1) So the user can override it.  (2) Because
++   * getlogin fails with ENXIO if there is no controlling terminal
++   * (which is often the case in test and embedded environments).
++   */
++  s = getenv ("LOGNAME");
++  if (s) {
++    ret = strdup (s);
++    if (ret == NULL) {
++      set_error (errno, "strdup");
++      return NULL;
++    }
++    return ret;
++  }
++
+   ret = malloc (L_cuserid);
+   if (ret == NULL) {
+     set_error (errno, "malloc");
+-- 
+2.22.0
+

libnbd.spec

@@ -22,6 +22,8 @@ Source1:        http://libguestfs.org/download/libnbd/%{source_directory}/%{name
 # https://pgp.key-server.io/pks/lookup?search=rjones%40redhat.com&fingerprint=on&op=vindex
 Source2:       libguestfs.keyring
 
+Patch1:        0001-lib-Try-LOGNAME-before-using-getlogin_r.patch
+
 %if 0%{patches_touch_autotools}
 BuildRequires: autoconf, automake, libtool
 %endif
@@ -218,6 +220,8 @@ make %{?_smp_mflags} check || {
 * Wed Aug 21 2019 Richard W.M. Jones <rjones@redhat.com> - 0.9.8-4
 - Fix nbdkit dependencies so we're actually running the tests.
 - Add glib2-devel BR so we build the glib main loop example.
+- Add upstream patch to fix test error:
+  nbd_connect_unix: getlogin: No such device or address
 
 * Tue Aug 20 2019 Richard W.M. Jones <rjones@redhat.com> - 0.9.8-3
 - Bump and rebuild to fix releng brokenness.