This adds code detecting the presence of utmpx.h and in its absence, turns the
utmp related functions into no-ops.
Signed-off-by: Stéphane Graber <stgra...@ubuntu.com>
---
configure.ac | 2 +-
src/lxc/utmp.c | 9 +++++++++
src/lxc/utmp.h | 9 +++++++++
3 files changed, 19 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index bc2ddc4..0d50bec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -221,7 +221,7 @@ AM_CONDITIONAL([IS_BIONIC], [test "x$is_bionic" = "xyes"])
AC_CHECK_DECLS([PR_CAPBSET_DROP], [], [], [#include <sys/prctl.h>])
# Check for some headers
-AC_CHECK_HEADERS([sys/signalfd.h pty.h sys/capability.h sys/personality.h])
+AC_CHECK_HEADERS([sys/signalfd.h pty.h sys/capability.h sys/personality.h
utmpx.h])
# Check for some syscalls functions
AC_CHECK_FUNCS([setns pivot_root sethostname unshare])
diff --git a/src/lxc/utmp.c b/src/lxc/utmp.c
index a7b9b52..f32ed63 100644
--- a/src/lxc/utmp.c
+++ b/src/lxc/utmp.c
@@ -21,6 +21,10 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include "config.h"
+
+#ifdef HAVE_UTMPX_H
+
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
@@ -37,7 +41,10 @@
#include "mainloop.h"
#include "lxc.h"
#include "log.h"
+
+#ifndef __USE_GNU
#define __USE_GNU
+#endif
#include <utmpx.h>
#undef __USE_GNU
@@ -410,3 +417,5 @@ int lxc_utmp_del_timer(struct lxc_epoll_descr *descr,
else
return 0;
}
+
+#endif
diff --git a/src/lxc/utmp.h b/src/lxc/utmp.h
index ac3eee4..1bd7c23 100644
--- a/src/lxc/utmp.h
+++ b/src/lxc/utmp.h
@@ -21,8 +21,17 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+#include "config.h"
+
struct lxc_handler;
struct lxc_epoll_descr;
+#ifdef HAVE_UTMPX_H
int lxc_utmp_mainloop_add(struct lxc_epoll_descr *descr,
struct lxc_handler *handler);
+#else
+static inline int lxc_utmp_mainloop_add(struct lxc_epoll_descr *descr,
+ struct lxc_handler *handler) {
+ return -1;
+}
+#endif
--
1.8.0
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