sd_uid_get_state: do not return -ENOENT if state is "offline" (#6302)

[elogind.git] / src / libelogind / sd-bus / sd-bus.c

diff --git a/src/libelogind/sd-bus/sd-bus.c b/src/libelogind/sd-bus/sd-bus.c
index b4a5c554c6ef8b78d32a93bd39b0f3b0cc653615..5df358f5a069356969f1a2945cd3d0d97edac41a 100644 (file)
--- a/src/libelogind/sd-bus/sd-bus.c
+++ b/src/libelogind/sd-bus/sd-bus.c
@@ -109,6 +109,7 @@ static void bus_free(sd_bus *b) {
 
         assert(b);
         assert(!b->track_queue);
+        assert(!b->tracks);
 
         b->state = BUS_CLOSED;
 
@@ -261,6 +262,7 @@ _public_ int sd_bus_set_exec(sd_bus *bus, const char *path, char *const argv[])
 
         return 0;
 }
+#endif // 0
 
 _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
         assert_return(bus, -EINVAL);
@@ -271,6 +273,7 @@ _public_ int sd_bus_set_bus_client(sd_bus *bus, int b) {
         return 0;
 }
 
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_set_monitor(sd_bus *bus, int b) {
         assert_return(bus, -EINVAL);
         assert_return(bus->state == BUS_UNSET, -EPERM);
@@ -279,6 +282,7 @@ _public_ int sd_bus_set_monitor(sd_bus *bus, int b) {
         SET_FLAG(bus->hello_flags, KDBUS_HELLO_MONITOR, b);
         return 0;
 }
+#endif // 0
 
 _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
         assert_return(bus, -EINVAL);
@@ -289,6 +293,7 @@ _public_ int sd_bus_negotiate_fds(sd_bus *bus, int b) {
         return 0;
 }
 
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_negotiate_timestamp(sd_bus *bus, int b) {
         uint64_t new_flags;
         assert_return(bus, -EINVAL);
@@ -332,6 +337,7 @@ _public_ int sd_bus_negotiate_creds(sd_bus *bus, int b, uint64_t mask) {
 
         return 0;
 }
+#endif // 0
 
 _public_ int sd_bus_set_server(sd_bus *bus, int b, sd_id128_t server_id) {
         assert_return(bus, -EINVAL);
@@ -353,6 +359,7 @@ _public_ int sd_bus_set_anonymous(sd_bus *bus, int b) {
         return 0;
 }
 
+#if 0 /// UNNEEDED by elogind
 _public_ int sd_bus_set_trusted(sd_bus *bus, int b) {
         assert_return(bus, -EINVAL);
         assert_return(bus->state == BUS_UNSET, -EPERM);
@@ -593,6 +600,8 @@ static int parse_unix_address(sd_bus *b, const char **p, char **guid) {
                 b->sockaddr_size = offsetof(struct sockaddr_un, sun_path) + 1 + l;
         }
 
+        b->is_local = true;
+
         return 0;
 }
 
@@ -660,6 +669,8 @@ static int parse_tcp_address(sd_bus *b, const char **p, char **guid) {
 
         freeaddrinfo(result);
 
+        b->is_local = false;
+
         return 0;
 }
 
@@ -742,6 +753,9 @@ static int parse_exec_address(sd_bus *b, const char **p, char **guid) {
 
         b->exec_path = path;
         b->exec_argv = argv;
+
+        b->is_local = false;
+
         return 0;
 
 fail:
@@ -785,6 +799,8 @@ static int parse_kernel_address(sd_bus *b, const char **p, char **guid) {
         b->kernel = path;
         path = NULL;
 
+        b->is_local = true;
+
         return 0;
 }
 
@@ -843,6 +859,7 @@ static int parse_container_unix_address(sd_bus *b, const char **p, char **guid)
         b->sockaddr.un.sun_family = AF_UNIX;
         strncpy(b->sockaddr.un.sun_path, "/var/run/dbus/system_bus_socket", sizeof(b->sockaddr.un.sun_path));
         b->sockaddr_size = SOCKADDR_UN_LEN(b->sockaddr.un);
+        b->is_local = false;
 
         return 0;
 }
@@ -903,6 +920,8 @@ static int parse_container_kernel_address(sd_bus *b, const char **p, char **guid
         if (r < 0)
                 return r;
 
+        b->is_local = false;
+
         return 0;
 }
 
@@ -1188,6 +1207,7 @@ _public_ int sd_bus_open(sd_bus **ret) {
         /* We don't know whether the bus is trusted or not, so better
          * be safe, and authenticate everything */
         b->trusted = false;
+        b->is_local = false;
         b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS;
         b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS;
 
@@ -1236,6 +1256,7 @@ _public_ int sd_bus_open_system(sd_bus **ret) {
         b->trusted = false;
         b->attach_flags |= KDBUS_ATTACH_CAPS | KDBUS_ATTACH_CREDS;
         b->creds_mask |= SD_BUS_CREDS_UID | SD_BUS_CREDS_EUID | SD_BUS_CREDS_EFFECTIVE_CAPS;
+        b->is_local = true;
 
         r = sd_bus_start(b);
         if (r < 0)
@@ -1305,6 +1326,7 @@ _public_ int sd_bus_open_user(sd_bus **ret) {
         /* We don't do any per-method access control on the user
          * bus. */
         b->trusted = true;
+        b->is_local = true;
 
         r = sd_bus_start(b);
         if (r < 0)
@@ -1354,7 +1376,7 @@ int bus_set_address_system_remote(sd_bus *b, const char *host) {
                         return -ENOMEM;
         }
 
-        b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c, NULL);
+        b->address = strjoin("unixexec:path=ssh,argv1=-xT,argv2=", e, ",argv3=systemd-stdio-bridge", c);
         if (!b->address)
                 return -ENOMEM;
 
@@ -1379,6 +1401,7 @@ _public_ int sd_bus_open_system_remote(sd_bus **ret, const char *host) {
         bus->bus_client = true;
         bus->trusted = false;
         bus->is_system = true;
+        bus->is_local = false;
 
         r = sd_bus_start(bus);
         if (r < 0)
@@ -1402,7 +1425,7 @@ int bus_set_address_system_machine(sd_bus *b, const char *machine) {
         if (!e)
                 return -ENOMEM;
 
-        b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e, NULL);
+        b->address = strjoin("x-machine-kernel:machine=", e, ";x-machine-unix:machine=", e);
         if (!b->address)
                 return -ENOMEM;
 
@@ -1428,6 +1451,7 @@ _public_ int sd_bus_open_system_machine(sd_bus **ret, const char *machine) {
         bus->bus_client = true;
         bus->trusted = false;
         bus->is_system = true;
+        bus->is_local = false;
 
         r = sd_bus_start(bus);
         if (r < 0)
@@ -2664,6 +2688,31 @@ null_message:
         return r;
 }
 
+static int bus_exit_now(sd_bus *bus) {
+        assert(bus);
+
+        /* Exit due to close, if this is requested. If this is bus object is attached to an event source, invokes
+         * sd_event_exit(), otherwise invokes libc exit(). */
+
+        if (bus->exited) /* did we already exit? */
+                return 0;
+        if (!bus->exit_triggered) /* was the exit condition triggered? */
+                return 0;
+        if (!bus->exit_on_disconnect) /* Shall we actually exit on disconnection? */
+                return 0;
+
+        bus->exited = true; /* never exit more than once */
+
+        log_debug("Bus connection disconnected, exiting.");
+
+        if (bus->event)
+                return sd_event_exit(bus->event, EXIT_FAILURE);
+        else
+                exit(EXIT_FAILURE);
+
+        assert_not_reached("exit() didn't exit?");
+}
+
 static int process_closing_reply_callback(sd_bus *bus, struct reply_callback *c) {
         _cleanup_(sd_bus_error_free) sd_bus_error error_buffer = SD_BUS_ERROR_NULL;
         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
@@ -2730,6 +2779,12 @@ static int process_closing(sd_bus *bus, sd_bus_message **ret) {
         if (c)
                 return process_closing_reply_callback(bus, c);
 
+        /* Then, fake-drop all remaining bus tracking references */
+        if (bus->tracks) {
+                bus_track_close(bus->tracks);
+                return 1;
+        }
+
         /* Then, synthesize a Disconnected message */
         r = sd_bus_message_new_signal(
                         bus,
@@ -2759,6 +2814,10 @@ static int process_closing(sd_bus *bus, sd_bus_message **ret) {
         if (r != 0)
                 goto finish;
 
+        /* Nothing else to do, exit now, if the condition holds */
+        bus->exit_triggered = true;
+        (void) bus_exit_now(bus);
+
         if (ret) {
                 *ret = m;
                 m = NULL;
@@ -3475,7 +3534,7 @@ _public_ int sd_bus_path_encode(const char *prefix, const char *external_id, cha
         if (!e)
                 return -ENOMEM;
 
-        ret = strjoin(prefix, "/", e, NULL);
+        ret = strjoin(prefix, "/", e);
         if (!ret)
                 return -ENOMEM;
 
@@ -3841,3 +3900,23 @@ _public_ void sd_bus_default_flush_close(void) {
         flush_close(default_system_bus);
 }
 #endif // 0
+
+_public_ int sd_bus_set_exit_on_disconnect(sd_bus *bus, int b) {
+        assert_return(bus, -EINVAL);
+
+        /* Turns on exit-on-disconnect, and triggers it immediately if the bus connection was already
+         * disconnected. Note that this is triggered exclusively on disconnections triggered by the server side, never
+         * from the client side. */
+        bus->exit_on_disconnect = b;
+
+        /* If the exit condition was triggered already, exit immediately. */
+        return bus_exit_now(bus);
+}
+
+#if 0 /// UNNEEDED by elogind
+_public_ int sd_bus_get_exit_on_disconnect(sd_bus *bus) {
+        assert_return(bus, -EINVAL);
+
+        return bus->exit_on_disconnect;
+}
+#endif // 0