make utmp/wtmp support configurable

This adds --disable-utmp option to configure. If it is used, all
utmp-related functionality, including querying runlevel support,
is removed.

1 files changed, 28 insertions, 0 deletions

diff --git a/src/shared/utmp-wtmp.h b/src/shared/utmp-wtmp.h
index 040a16e746..87d004e615 100644
--- a/src/shared/utmp-wtmp.h
+++ b/src/shared/utmp-wtmp.h
@@ -23,6 +23,7 @@
 
 #include "util.h"
 
+#ifdef HAVE_UTMP
 int utmp_get_runlevel(int *runlevel, int *previous);
 
 int utmp_put_shutdown(void);
@@ -33,3 +34,30 @@ int utmp_put_dead_process(const char *id, pid_t pid, int code, int status);
 int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line);
 
 int utmp_wall(const char *message, const char *username, bool (*match_tty)(const char *tty));
+
+#else /* HAVE_UTMP */
+
+static inline int utmp_get_runlevel(int *runlevel, int *previous) {
+        return -ESRCH;
+}
+static inline int utmp_put_shutdown(void) {
+        return 0;
+}
+static inline int utmp_put_reboot(usec_t timestamp) {
+        return 0;
+}
+static inline int utmp_put_runlevel(int runlevel, int previous) {
+        return 0;
+}
+static inline int utmp_put_dead_process(const char *id, pid_t pid, int code, int status) {
+        return 0;
+}
+static inline int utmp_put_init_process(const char *id, pid_t pid, pid_t sid, const char *line) {
+        return 0;
+}
+static inline int utmp_wall(const char *message, const char *username,
+                bool (*match_tty)(const char *tty)) {
+        return 0;
+}
+
+#endif /* HAVE_UTMP */