UTIL: Introduce --dbus-activated cmd option for responders

Similarly to the --socket-activated cmd option, --dbus-activated cmd
option is going to be used for dbus-activated responders in order to
easily setup a timeout to shutdown the idle responder in case it has
been socket activated and is idle.

This option has been encapsulated on is_dbus_activated() function,
which will always return "false" when called on platforms where systemd
is not supported.

For now any of the services are taking advantage of this newly
introduced option/function, but later on in this series it's going to be
used.

In order to use it, just add SSSD_RESPONDER_OPTS to the poptOption
structure.

Related:
https://fedorahosted.org/sssd/ticket/2243

Signed-off-by: Fabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: Pavel Březina <pbrezina@redhat.com>
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
Reviewed-by: Lukáš Slebodník <lslebodn@redhat.com>

4 files changed, 22 insertions, 3 deletions

diff --git a/src/responder/common/responder.h b/src/responder/common/responder.h
index 181c96ad1..40c884070 100644
--- a/src/responder/common/responder.h
+++ b/src/responder/common/responder.h
@@ -128,6 +128,7 @@ struct resp_ctx {
 
     bool shutting_down;
     bool socket_activated;
+    bool dbus_activated;
 };
 
 struct cli_creds;
diff --git a/src/responder/common/responder_common.c b/src/responder/common/responder_common.c
index 3e38d3b5b..a64334d9d 100644
--- a/src/responder/common/responder_common.c
+++ b/src/responder/common/responder_common.c
@@ -952,6 +952,7 @@ int sss_process_init(TALLOC_CTX *mem_ctx,
     rctx->confdb_service_path = confdb_service_path;
     rctx->shutting_down = false;
     rctx->socket_activated = is_socket_activated();
+    rctx->dbus_activated = is_dbus_activated();
 
     talloc_set_destructor((TALLOC_CTX*)rctx, sss_responder_ctx_destructor);
 
@@ -1089,8 +1090,9 @@ int sss_process_init(TALLOC_CTX *mem_ctx,
 
     DEBUG(SSSDBG_TRACE_FUNC,
           "Responder initialization complete (%s)\n",
-          rctx->socket_activated ? "socket-activated" :
-                                   "explicitly configured");
+          rctx->socket_activated  ? "socket-activated" :
+                                    rctx->dbus_activated ? "dbus-activated" :
+                                                            "explicitly configured");
 
     *responder_ctx = rctx;
     return EOK;
diff --git a/src/util/util.c b/src/util/util.c
index 5cc4ac9dc..885f67e66 100644
--- a/src/util/util.c
+++ b/src/util/util.c
@@ -33,6 +33,7 @@
 #include "util/sss_utf8.h"
 
 int socket_activated = 0;
+int dbus_activated = 0;
 
 int split_on_separator(TALLOC_CTX *mem_ctx, const char *str,
                        const char sep, bool trim, bool skip_empty,
@@ -1288,3 +1289,12 @@ bool is_socket_activated(void)
     return false;
 #endif
 }
+
+bool is_dbus_activated(void)
+{
+#ifdef HAVE_SYSTEMD
+    return !!dbus_activated;
+#else
+    return false;
+#endif
+}
diff --git a/src/util/util.h b/src/util/util.h
index 304a3583b..a2dc89b8d 100644
--- a/src/util/util.h
+++ b/src/util/util.h
@@ -84,11 +84,14 @@
           _("The group ID to run the server as"), NULL},
 
 extern int socket_activated;
+extern int dbus_activated;
 
 #ifdef HAVE_SYSTEMD
 #define SSSD_RESPONDER_OPTS \
         { "socket-activated", 0, POPT_ARG_NONE, &socket_activated, 0, \
-          _("Informs that the responder has been socket-activated"), NULL },
+          _("Informs that the responder has been socket-activated"), NULL }, \
+        { "dbus-activated", 0, POPT_ARG_NONE, &dbus_activated, 0, \
+          _("Informs that the responder has been dbus-activated"), NULL },
 #else
 #define SSSD_RESPONDER_OPTS
 #endif
@@ -392,6 +395,9 @@ bool is_user_or_group_name(const char *sudo_user_value);
 /* Returns true if the responder has been socket-activated */
 bool is_socket_activated(void);
 
+/* Returns true if the responder has been dbus-activated */
+bool is_dbus_activated(void);
+
 /**
  * @brief Add two list of strings
  *