tree-wide: make bus_map_all_properties return a proper sd_bus_error

And then show it, to make things a bit friendlier to the user if we fail
acquiring some props.

In fact, this fixes a number of actual bugs, where we used an error
structure for output that we actually never got an error in.

11 files changed, 74 insertions, 39 deletions

diff --git a/src/analyze/analyze.c b/src/analyze/analyze.c
index 51d881c5fb..a9402fdb28 100644
--- a/src/analyze/analyze.c
+++ b/src/analyze/analyze.c
@@ -461,6 +461,7 @@ static int acquire_host_info(sd_bus *bus, struct host_info **hi) {
                                    "org.freedesktop.hostname1",
                                    "/org/freedesktop/hostname1",
                                    hostname_map,
+                                   &error,
                                    host);
         if (r < 0)
                 log_debug_errno(r, "Failed to get host information from systemd-hostnamed: %s", bus_error_message(&error, r));
@@ -469,6 +470,7 @@ static int acquire_host_info(sd_bus *bus, struct host_info **hi) {
                                    "org.freedesktop.systemd1",
                                    "/org/freedesktop/systemd1",
                                    manager_map,
+                                   &error,
                                    host);
         if (r < 0)
                 return log_error_errno(r, "Failed to get host information from systemd: %s", bus_error_message(&error, r));
diff --git a/src/hostname/hostnamectl.c b/src/hostname/hostnamectl.c
index 07c57fb567..f5a9de94a6 100644
--- a/src/hostname/hostnamectl.c
+++ b/src/hostname/hostnamectl.c
@@ -137,10 +137,8 @@ static int show_one_name(sd_bus *bus, const char* attr) {
                         "org.freedesktop.hostname1",
                         attr,
                         &error, &reply, "s");
-        if (r < 0) {
-                log_error("Could not get property: %s", bus_error_message(&error, -r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Could not get property: %s", bus_error_message(&error, r));
 
         r = sd_bus_message_read(reply, "s", &s);
         if (r < 0)
@@ -151,7 +149,7 @@ static int show_one_name(sd_bus *bus, const char* attr) {
         return 0;
 }
 
-static int show_all_names(sd_bus *bus) {
+static int show_all_names(sd_bus *bus, sd_bus_error *error) {
         StatusInfo info = {};
 
         static const struct bus_properties_map hostname_map[]  = {
@@ -181,6 +179,7 @@ static int show_all_names(sd_bus *bus) {
                                    "org.freedesktop.hostname1",
                                    "/org/freedesktop/hostname1",
                                    hostname_map,
+                                   error,
                                    &info);
         if (r < 0)
                 goto fail;
@@ -189,6 +188,7 @@ static int show_all_names(sd_bus *bus) {
                                "org.freedesktop.systemd1",
                                "/org/freedesktop/systemd1",
                                manager_map,
+                               error,
                                &info);
 
         print_status_info(&info);
@@ -212,6 +212,8 @@ fail:
 }
 
 static int show_status(sd_bus *bus, char **args, unsigned n) {
+        int r;
+
         assert(args);
 
         if (arg_pretty || arg_static || arg_transient) {
@@ -226,8 +228,15 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
                         arg_static ? "StaticHostname" : "Hostname";
 
                 return show_one_name(bus, attr);
-        } else
-                return show_all_names(bus);
+        } else {
+                _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
+
+                r = show_all_names(bus, &error);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to query system properties: %s", bus_error_message(&error, r));
+
+                return 0;
+        }
 }
 
 static int set_simple_string(sd_bus *bus, const char *method, const char *value) {
diff --git a/src/locale/localectl.c b/src/locale/localectl.c
index 81afb4909f..0bd18a5c0b 100644
--- a/src/locale/localectl.c
+++ b/src/locale/localectl.c
@@ -166,6 +166,8 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
                 { "Locale",               "as", NULL, offsetof(StatusInfo, locale) },
                 {}
         };
+
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
 
         assert(bus);
@@ -174,9 +176,10 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
                                    "org.freedesktop.locale1",
                                    "/org/freedesktop/locale1",
                                    map,
+                                   &error,
                                    &info);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         print_overridden_variables();
         print_status_info(&info);
diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index 1aac7ae979..7dea5c0859 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -482,14 +482,15 @@ static int print_session_status_info(sd_bus *bus, const char *path, bool *new_li
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
         char since2[FORMAT_TIMESTAMP_MAX], *s2;
         _cleanup_(session_status_info_clear) SessionStatusInfo i = {};
         int r;
 
-        r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
+        r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &error, &i);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         if (*new_line)
                 printf("\n");
@@ -611,14 +612,15 @@ static int print_user_status_info(sd_bus *bus, const char *path, bool *new_line)
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], *s1;
         char since2[FORMAT_TIMESTAMP_MAX], *s2;
         _cleanup_(user_status_info_clear) UserStatusInfo i = {};
         int r;
 
-        r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
+        r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &error, &i);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         if (*new_line)
                 printf("\n");
@@ -685,12 +687,13 @@ static int print_seat_status_info(sd_bus *bus, const char *path, bool *new_line)
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         _cleanup_(seat_status_info_clear) SeatStatusInfo i = {};
         int r;
 
-        r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &i);
+        r = bus_map_all_properties(bus, "org.freedesktop.login1", path, map, &error, &i);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         if (*new_line)
                 printf("\n");
diff --git a/src/machine/machinectl.c b/src/machine/machinectl.c
index 4f5f659c7c..fe4f1b7726 100644
--- a/src/machine/machinectl.c
+++ b/src/machine/machinectl.c
@@ -772,6 +772,7 @@ static int show_machine_info(const char *verb, sd_bus *bus, const char *path, bo
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         _cleanup_(machine_status_info_clear) MachineStatusInfo info = {};
         int r;
 
@@ -784,9 +785,10 @@ static int show_machine_info(const char *verb, sd_bus *bus, const char *path, bo
                                    "org.freedesktop.machine1",
                                    path,
                                    map,
+                                   &error,
                                    &info);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         if (*new_line)
                 printf("\n");
@@ -962,6 +964,7 @@ static int show_image_info(sd_bus *bus, const char *path, bool *new_line) {
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         _cleanup_(image_status_info_clear) ImageStatusInfo info = {};
         int r;
 
@@ -973,9 +976,10 @@ static int show_image_info(sd_bus *bus, const char *path, bool *new_line) {
                                    "org.freedesktop.machine1",
                                    path,
                                    map,
+                                   &error,
                                    &info);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         if (*new_line)
                 printf("\n");
@@ -1029,6 +1033,8 @@ static int show_pool_info(sd_bus *bus) {
                 .usage = (uint64_t) -1,
                 .limit = (uint64_t) -1,
         };
+
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
 
         assert(bus);
@@ -1037,9 +1043,10 @@ static int show_pool_info(sd_bus *bus) {
                                    "org.freedesktop.machine1",
                                    "/org/freedesktop/machine1",
                                    map,
+                                   &error,
                                    &info);
         if (r < 0)
-                return log_error_errno(r, "Could not get properties: %m");
+                return log_error_errno(r, "Could not get properties: %s", bus_error_message(&error, r));
 
         print_pool_status_info(bus, &info);
 
diff --git a/src/resolve/resolve-tool.c b/src/resolve/resolve-tool.c
index 07d9582ccb..13841c2b57 100644
--- a/src/resolve/resolve-tool.c
+++ b/src/resolve/resolve-tool.c
@@ -1186,6 +1186,7 @@ static int status_ifindex(sd_bus *bus, int ifindex, const char *name, bool *empt
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         _cleanup_free_ char *ifi = NULL, *p = NULL;
         char ifname[IF_NAMESIZE] = "";
         char **i;
@@ -1213,9 +1214,10 @@ static int status_ifindex(sd_bus *bus, int ifindex, const char *name, bool *empt
                                    "org.freedesktop.resolve1",
                                    p,
                                    property_map,
+                                   &error,
                                    &link_info);
         if (r < 0) {
-                log_error_errno(r, "Failed to get link data for %i: %m", ifindex);
+                log_error_errno(r, "Failed to get link data for %i: %s", ifindex, bus_error_message(&error, r));
                 goto finish;
         }
 
@@ -1405,6 +1407,7 @@ static int status_global(sd_bus *bus, bool *empty_line) {
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         char **i;
         int r;
 
@@ -1415,9 +1418,10 @@ static int status_global(sd_bus *bus, bool *empty_line) {
                                    "org.freedesktop.resolve1",
                                    "/org/freedesktop/resolve1",
                                    property_map,
+                                   &error,
                                    &global_info);
         if (r < 0) {
-                log_error_errno(r, "Failed to get global data: %m");
+                log_error_errno(r, "Failed to get global data: %s", bus_error_message(&error, r));
                 goto finish;
         }
 
diff --git a/src/run/run.c b/src/run/run.c
index 08f7e12336..f8257abc93 100644
--- a/src/run/run.c
+++ b/src/run/run.c
@@ -818,16 +818,18 @@ static int run_context_update(RunContext *c, const char *path) {
                 {}
         };
 
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
 
         r = bus_map_all_properties(c->bus,
                                    "org.freedesktop.systemd1",
                                    path,
                                    map,
+                                   &error,
                                    c);
         if (r < 0) {
                 sd_event_exit(c->event, EXIT_FAILURE);
-                return log_error_errno(r, "Failed to query unit state: %m");
+                return log_error_errno(r, "Failed to query unit state: %s", bus_error_message(&error, r));
         }
 
         run_context_check_done(c);
diff --git a/src/shared/bus-util.c b/src/shared/bus-util.c
index 6aebe18fc0..8ddfb584ea 100644
--- a/src/shared/bus-util.c
+++ b/src/shared/bus-util.c
@@ -1116,9 +1116,9 @@ static int map_basic(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_
 int bus_message_map_all_properties(
                 sd_bus_message *m,
                 const struct bus_properties_map *map,
+                sd_bus_error *error,
                 void *userdata) {
 
-        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
 
         assert(m);
@@ -1156,9 +1156,9 @@ int bus_message_map_all_properties(
 
                         v = (uint8_t *)userdata + prop->offset;
                         if (map[i].set)
-                                r = prop->set(sd_bus_message_get_bus(m), member, m, &error, v);
+                                r = prop->set(sd_bus_message_get_bus(m), member, m, error, v);
                         else
-                                r = map_basic(sd_bus_message_get_bus(m), member, m, &error, v);
+                                r = map_basic(sd_bus_message_get_bus(m), member, m, error, v);
                         if (r < 0)
                                 return r;
 
@@ -1184,6 +1184,7 @@ int bus_message_map_all_properties(
 int bus_message_map_properties_changed(
                 sd_bus_message *m,
                 const struct bus_properties_map *map,
+                sd_bus_error *error,
                 void *userdata) {
 
         const char *member;
@@ -1192,7 +1193,7 @@ int bus_message_map_properties_changed(
         assert(m);
         assert(map);
 
-        r = bus_message_map_all_properties(m, map, userdata);
+        r = bus_message_map_all_properties(m, map, error, userdata);
         if (r < 0)
                 return r;
 
@@ -1222,10 +1223,10 @@ int bus_map_all_properties(
                 const char *destination,
                 const char *path,
                 const struct bus_properties_map *map,
+                sd_bus_error *error,
                 void *userdata) {
 
         _cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
-        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
 
         assert(bus);
@@ -1239,13 +1240,13 @@ int bus_map_all_properties(
                         path,
                         "org.freedesktop.DBus.Properties",
                         "GetAll",
-                        &error,
+                        error,
                         &m,
                         "s", "");
         if (r < 0)
                 return r;
 
-        return bus_message_map_all_properties(m, map, userdata);
+        return bus_message_map_all_properties(m, map, error, userdata);
 }
 
 int bus_connect_transport(BusTransport transport, const char *host, bool user, sd_bus **ret) {
diff --git a/src/shared/bus-util.h b/src/shared/bus-util.h
index af5f133912..d9ce4263bb 100644
--- a/src/shared/bus-util.h
+++ b/src/shared/bus-util.h
@@ -50,9 +50,9 @@ struct bus_properties_map {
 
 int bus_map_id128(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata);
 
-int bus_message_map_all_properties(sd_bus_message *m, const struct bus_properties_map *map,  void *userdata);
-int bus_message_map_properties_changed(sd_bus_message *m, const struct bus_properties_map *map, void *userdata);
-int bus_map_all_properties(sd_bus *bus, const char *destination, const char *path, const struct bus_properties_map *map, void *userdata);
+int bus_message_map_all_properties(sd_bus_message *m, const struct bus_properties_map *map, sd_bus_error *error, void *userdata);
+int bus_message_map_properties_changed(sd_bus_message *m, const struct bus_properties_map *map, sd_bus_error *error, void *userdata);
+int bus_map_all_properties(sd_bus *bus, const char *destination, const char *path, const struct bus_properties_map *map, sd_bus_error *error, void *userdata);
 
 int bus_async_unregister_and_exit(sd_event *e, sd_bus *bus, const char *name);
 
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 2809dece50..2336ae34f4 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -1922,7 +1922,7 @@ static int get_machine_properties(sd_bus *bus, struct machine_info *mi) {
                 bus = container;
         }
 
-        r = bus_map_all_properties(bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", machine_info_property_map, mi);
+        r = bus_map_all_properties(bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", machine_info_property_map, NULL, mi);
         if (r < 0)
                 return r;
 
@@ -1957,7 +1957,7 @@ static int get_machine_list(
                 machine_infos[c].name = hn;
                 hn = NULL;
 
-                get_machine_properties(bus, &machine_infos[c]);
+                (void) get_machine_properties(bus, &machine_infos[c]);
                 c++;
         }
 
@@ -1987,7 +1987,7 @@ static int get_machine_list(
                         return log_oom();
                 }
 
-                get_machine_properties(NULL, &machine_infos[c]);
+                (void) get_machine_properties(NULL, &machine_infos[c]);
                 c++;
         }
 
@@ -4953,7 +4953,7 @@ static int show_one(
                 return log_error_errno(r, "Failed to get properties: %s", bus_error_message(&error, r));
 
         if (unit) {
-                r = bus_message_map_all_properties(reply, property_map, &info);
+                r = bus_message_map_all_properties(reply, property_map, &error, &info);
                 if (r < 0)
                         return log_error_errno(r, "Failed to map properties: %s", bus_error_message(&error, r));
 
@@ -5125,8 +5125,9 @@ static int show_all(
 
 static int show_system_status(sd_bus *bus) {
         char since1[FORMAT_TIMESTAMP_RELATIVE_MAX], since2[FORMAT_TIMESTAMP_MAX];
-        _cleanup_free_ char *hn = NULL;
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         _cleanup_(machine_info_clear) struct machine_info mi = {};
+        _cleanup_free_ char *hn = NULL;
         const char *on, *off;
         int r;
 
@@ -5134,9 +5135,9 @@ static int show_system_status(sd_bus *bus) {
         if (!hn)
                 return log_oom();
 
-        r = bus_map_all_properties(bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", machine_info_property_map, &mi);
+        r = bus_map_all_properties(bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", machine_info_property_map, &error, &mi);
         if (r < 0)
-                return log_error_errno(r, "Failed to read server status: %m");
+                return log_error_errno(r, "Failed to read server status: %s", bus_error_message(&error, r));
 
         if (streq_ptr(mi.state, "degraded")) {
                 on = ansi_highlight_red();
@@ -6028,7 +6029,7 @@ static int unit_exists(const char *unit) {
         if (r < 0)
                 return log_error_errno(r, "Failed to get properties: %s", bus_error_message(&error, r));
 
-        r = bus_message_map_all_properties(reply, property_map, &info);
+        r = bus_message_map_all_properties(reply, property_map, &error, &info);
         if (r < 0)
                 return log_error_errno(r, "Failed to map properties: %s", bus_error_message(&error, r));
 
diff --git a/src/timedate/timedatectl.c b/src/timedate/timedatectl.c
index 553ef67011..281b1534a3 100644
--- a/src/timedate/timedatectl.c
+++ b/src/timedate/timedatectl.c
@@ -165,6 +165,8 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
                 { "RTCTimeUSec",     "t", NULL, offsetof(StatusInfo, rtc_time) },
                 {}
         };
+
+        _cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
         int r;
 
         assert(bus);
@@ -173,9 +175,10 @@ static int show_status(sd_bus *bus, char **args, unsigned n) {
                                    "org.freedesktop.timedate1",
                                    "/org/freedesktop/timedate1",
                                    map,
+                                   &error,
                                    &info);
         if (r < 0)
-                return log_error_errno(r, "Failed to query server: %m");
+                return log_error_errno(r, "Failed to query server: %s", bus_error_message(&error, r));
 
         print_status_info(&info);