Add support for building elogind against musl libc

[elogind.git] / src / login / logind.c

diff --git a/src/login/logind.c b/src/login/logind.c
index d60241342216549b5d8cc795a76db252a4f86e5b..72889535e330b0176dc7115d4635d981491e2c4c 100644 (file)
--- a/src/login/logind.c
+++ b/src/login/logind.c
@@ -36,6 +36,7 @@
 #include "label.h"
 #include "label.h"
 #include "cgroup.h"
+#include "virt.h"
 
 static void manager_free(Manager *m);
 
@@ -206,6 +207,12 @@ static void manager_free(Manager *m) {
         safe_close(m->reserve_vt_fd);
 #endif // 0
 
+        /* Avoid the creation of new processes forked by the
+         * kernel; at this point, we will not listen to the
+         * signals anyway */
+        if (detect_container(NULL) <= 0)
+                (void) cg_uninstall_release_agent(ELOGIND_CGROUP_CONTROLLER);
+
         manager_shutdown_cgroup(m, true);
 
         strv_free(m->kill_only_users);
@@ -628,6 +635,34 @@ static int manager_reserve_vt(Manager *m) {
 }
 #endif // 0
 
+static int signal_agent_released(sd_bus_message *message, void *userdata, sd_bus_error *error) {
+        Manager *m = userdata;
+        Session *s;
+        const char *cgroup;
+        int r;
+
+        assert(message);
+        assert(m);
+
+        r = sd_bus_message_read(message, "s", &cgroup);
+        if (r < 0) {
+                bus_log_parse_error(r);
+                return 0;
+        }
+
+        s = hashmap_get(m->sessions, cgroup);
+
+        if (!s) {
+                log_warning("Session not found: %s", cgroup);
+                return 0;
+        }
+
+        session_finalize(s);
+        session_free(s);
+
+        return 0;
+}
+
 static int manager_connect_bus(Manager *m) {
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
@@ -643,6 +678,14 @@ static int manager_connect_bus(Manager *m) {
         if (r < 0)
                 return log_error_errno(r, "Failed to add manager object vtable: %m");
 
+        /* elogind relies on signals from its release agent */
+        r = sd_bus_add_match(m->bus, NULL,
+                             "type='signal',"
+                             "interface='org.freedesktop.elogind.Agent',"
+                             "member='Released',"
+                             "path='/org/freedesktop/elogind/agent'",
+                             signal_agent_released, m);
+
         r = sd_bus_add_fallback_vtable(m->bus, NULL, "/org/freedesktop/login1/seat", "org.freedesktop.login1.Seat", seat_vtable, seat_object_find, m);
         if (r < 0)
                 return log_error_errno(r, "Failed to add seat object vtable: %m");
@@ -667,7 +710,7 @@ static int manager_connect_bus(Manager *m) {
         if (r < 0)
                 return log_error_errno(r, "Failed to add user enumerator: %m");
 
-/// elogind does not support systemd action jobs
+/// elogind does not support systemd as PID 1
 #if 0
         r = sd_bus_add_match(m->bus,
                              NULL,
@@ -679,7 +722,6 @@ static int manager_connect_bus(Manager *m) {
                              match_job_removed, m);
         if (r < 0)
                 log_warning_errno(r, "Failed to add match for JobRemoved: %m");
-#endif // 0
 
         r = sd_bus_add_match(m->bus,
                              NULL,
@@ -723,6 +765,7 @@ static int manager_connect_bus(Manager *m) {
                         NULL, NULL);
         if (r < 0)
                 log_notice("Failed to enable subscription: %s", bus_error_message(&error, r));
+#endif // 0
 
         r = sd_bus_request_name(m->bus, "org.freedesktop.login1", 0);
         if (r < 0)
@@ -1187,11 +1230,16 @@ int main(int argc, char *argv[]) {
         Manager *m = NULL;
         int r;
 
+        elogind_set_program_name(argv[0]);
         log_set_target(LOG_TARGET_AUTO);
         log_set_facility(LOG_AUTH);
         log_parse_environment();
         log_open();
 
+#ifdef ENABLE_DEBUG_ELOGIND
+        log_set_max_level(LOG_DEBUG);
+#endif // ENABLE_DEBUG_ELOGIND
+
         umask(0022);
 
         if (argc != 1) {