chiark / gitweb /
systemctl: move two functions up
[elogind.git] / src / systemctl / systemctl.c
index 88be871f326eb16750ec085819caafcd68ae3999..d16c673dcd4a772e2b460269b80db1421f3aa426 100644 (file)
 #include "logs-show.h"
 #include "socket-util.h"
 #include "fileio.h"
+#include "copy.h"
 #include "env-util.h"
 #include "bus-util.h"
 #include "bus-message.h"
 #include "bus-error.h"
-#include "bus-errors.h"
+#include "bus-common-errors.h"
+#include "mkdir.h"
 
 static char **arg_types = NULL;
 static char **arg_states = NULL;
@@ -137,23 +139,6 @@ static unsigned arg_lines = 10;
 static OutputMode arg_output = OUTPUT_SHORT;
 static bool arg_plain = false;
 
-static const struct {
-        const char *verb;
-        const char *method;
-} unit_actions[] = {
-        { "start",                 "StartUnit" },
-        { "stop",                  "StopUnit" },
-        { "condstop",              "StopUnit" },
-        { "reload",                "ReloadUnit" },
-        { "restart",               "RestartUnit" },
-        { "try-restart",           "TryRestartUnit" },
-        { "condrestart",           "TryRestartUnit" },
-        { "reload-or-restart",     "ReloadOrRestartUnit" },
-        { "reload-or-try-restart", "ReloadOrTryRestartUnit" },
-        { "condreload",            "ReloadOrTryRestartUnit" },
-        { "force-reload",          "ReloadOrTryRestartUnit" }
-};
-
 static bool original_stdout_is_tty;
 
 static int daemon_reload(sd_bus *bus, char **args);
@@ -318,21 +303,37 @@ static int compare_unit_info(const void *a, const void *b) {
 }
 
 static bool output_show_unit(const UnitInfo *u, char **patterns) {
-        const char *dot;
-
         if (!strv_isempty(patterns)) {
                 char **pattern;
 
                 STRV_FOREACH(pattern, patterns)
                         if (fnmatch(*pattern, u->id, FNM_NOESCAPE) == 0)
-                                return true;
+                                goto next;
                 return false;
         }
 
-        return (!arg_types || ((dot = strrchr(u->id, '.')) &&
-                               strv_find(arg_types, dot+1))) &&
-                (arg_all || !(streq(u->active_state, "inactive")
-                              || u->following[0]) || u->job_id > 0);
+next:
+        if (arg_types) {
+                const char *dot;
+
+                dot = strrchr(u->id, '.');
+                if (!dot)
+                        return false;
+
+                if (!strv_find(arg_types, dot+1))
+                        return false;
+        }
+
+        if (arg_all)
+                return true;
+
+        if (u->job_id > 0)
+                return true;
+
+        if (streq(u->active_state, "inactive") || u->following[0])
+                return false;
+
+        return true;
 }
 
 static int output_units_list(const UnitInfo *unit_infos, unsigned c) {
@@ -622,7 +623,7 @@ static int get_unit_list_recursive(
 
                         r = sd_bus_open_system_container(&container, *i);
                         if (r < 0) {
-                                log_error("Failed to connect to container %s: %s", *i, strerror(-r));
+                                log_error_errno(r, "Failed to connect to container %s: %m", *i);
                                 continue;
                         }
 
@@ -751,7 +752,7 @@ struct socket_info {
 
         /* Note: triggered is a list here, although it almost certainly
          * will always be one unit. Nevertheless, dbus API allows for multiple
-         * values, so let's follow that.*/
+         * values, so let's follow that. */
         char** triggered;
 
         /* The strv above is shared. free is set only in the first one. */
@@ -1248,18 +1249,33 @@ static int compare_unit_file_list(const void *a, const void *b) {
 }
 
 static bool output_show_unit_file(const UnitFileList *u, char **patterns) {
-        const char *dot;
-
         if (!strv_isempty(patterns)) {
                 char **pattern;
 
                 STRV_FOREACH(pattern, patterns)
                         if (fnmatch(*pattern, basename(u->path), FNM_NOESCAPE) == 0)
-                                return true;
+                                goto next;
                 return false;
         }
 
-        return !arg_types || ((dot = strrchr(u->path, '.')) && strv_find(arg_types, dot+1));
+next:
+        if (!strv_isempty(arg_types)) {
+                const char *dot;
+
+                dot = strrchr(u->path, '.');
+                if (!dot)
+                        return false;
+
+                if (!strv_find(arg_types, dot+1))
+                        return false;
+        }
+
+        if (!strv_isempty(arg_states)) {
+                if (!strv_find(arg_states, unit_file_state_to_string(u->state)))
+                        return false;
+        }
+
+        return true;
 }
 
 static void output_unit_file_list(const UnitFileList *units, unsigned c) {
@@ -1345,7 +1361,7 @@ static int list_unit_files(sd_bus *bus, char **args) {
                 r = unit_file_get_list(arg_scope, arg_root, h);
                 if (r < 0) {
                         unit_file_list_free(h);
-                        log_error("Failed to get unit file list: %s", strerror(-r));
+                        log_error_errno(r, "Failed to get unit file list: %m");
                         return r;
                 }
 
@@ -1465,11 +1481,13 @@ static int list_dependencies_get_dependencies(sd_bus *bus, const char *name, cha
                                        "RequiresOverridable\0"
                                        "Requisite\0"
                                        "RequisiteOverridable\0"
-                                       "Wants\0",
+                                       "Wants\0"
+                                       "BindsTo\0",
                 [DEPENDENCY_REVERSE] = "RequiredBy\0"
                                        "RequiredByOverridable\0"
                                        "WantedBy\0"
-                                       "PartOf\0",
+                                       "PartOf\0"
+                                       "BoundBy\0",
                 [DEPENDENCY_AFTER]   = "After\0",
                 [DEPENDENCY_BEFORE]  = "Before\0",
         };
@@ -1889,10 +1907,8 @@ static int get_default(sd_bus *bus, char **args) {
 
         if (!bus || avoid_bus()) {
                 r = unit_file_get_default(arg_scope, arg_root, &_path);
-                if (r < 0) {
-                        log_error("Failed to get default target: %s", strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_error_errno(r, "Failed to get default target: %m");
                 path = _path;
 
         } else {
@@ -1972,28 +1988,36 @@ static int set_default(sd_bus *bus, char **args) {
 
         if (!bus || avoid_bus()) {
                 r = unit_file_set_default(arg_scope, arg_root, unit, true, &changes, &n_changes);
-                if (r < 0) {
-                        log_error("Failed to set default target: %s", strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_error_errno(r, "Failed to set default target: %m");
 
                 if (!arg_quiet)
                         dump_unit_file_changes(changes, n_changes);
 
                 r = 0;
         } else {
-                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *m = NULL;
                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
 
-                r = sd_bus_call_method(
+                r = sd_bus_message_new_method_call(
                                 bus,
+                                &m,
                                 "org.freedesktop.systemd1",
                                 "/org/freedesktop/systemd1",
                                 "org.freedesktop.systemd1.Manager",
-                                "SetDefaultTarget",
-                                &error,
-                                &reply,
-                                "sb", unit, true);
+                                "SetDefaultTarget");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_append(m, "sb", unit, 1);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_call(bus, m, 0, &error, &reply);
                 if (r < 0) {
                         log_error("Failed to set default target: %s", bus_error_message(&error, -r));
                         return r;
@@ -2160,6 +2184,7 @@ static int list_jobs(sd_bus *bus, char **args) {
 static int cancel_job(sd_bus *bus, char **args) {
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         char **name;
+        int r = 0;
 
         assert(args);
 
@@ -2167,31 +2192,41 @@ static int cancel_job(sd_bus *bus, char **args) {
                 return daemon_reload(bus, args);
 
         STRV_FOREACH(name, args+1) {
+                _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
                 uint32_t id;
-                int r;
+                int q;
 
-                r = safe_atou32(*name, &id);
-                if (r < 0) {
-                        log_error("Failed to parse job id \"%s\": %s", *name, strerror(-r));
-                        return r;
-                }
+                q = safe_atou32(*name, &id);
+                if (q < 0)
+                        return log_error_errno(q, "Failed to parse job id \"%s\": %m", *name);
 
-                r = sd_bus_call_method(
+                q = sd_bus_message_new_method_call(
                                 bus,
+                                &m,
                                 "org.freedesktop.systemd1",
                                 "/org/freedesktop/systemd1",
                                 "org.freedesktop.systemd1.Manager",
-                                "CancelJob",
-                                &error,
-                                NULL,
-                                "u", id);
-                if (r < 0) {
-                        log_error("Failed to cancel job %u: %s", (unsigned) id, bus_error_message(&error, r));
-                        return r;
+                                "CancelJob");
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (q < 0)
+                        return bus_log_create_error(1);
+
+                q = sd_bus_message_append(m, "u", id);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_call(bus, m, 0, &error, NULL);
+                if (q < 0) {
+                        log_error("Failed to cancel job %"PRIu32": %s", id, bus_error_message(&error, q));
+                        if (r == 0)
+                                r = q;
                 }
         }
 
-        return 0;
+        return r;
 }
 
 static int need_daemon_reload(sd_bus *bus, const char *unit) {
@@ -2235,6 +2270,92 @@ static int need_daemon_reload(sd_bus *bus, const char *unit) {
         return b;
 }
 
+static void warn_unit_file_changed(const char *name) {
+        log_warning("%sWarning:%s %s changed on disk. Run 'systemctl%s daemon-reload' to reload units.",
+                    ansi_highlight_red(),
+                    ansi_highlight_off(),
+                    name,
+                    arg_scope == UNIT_FILE_SYSTEM ? "" : " --user");
+}
+
+static int unit_file_find_path(LookupPaths *lp, const char *unit_name, char **unit_path) {
+        char **p;
+
+        assert(lp);
+        assert(unit_name);
+        assert(unit_path);
+
+        STRV_FOREACH(p, lp->unit_path) {
+                char *path;
+
+                path = path_join(arg_root, *p, unit_name);
+                if (!path)
+                        return log_oom();
+
+                if (access(path, F_OK) == 0) {
+                        *unit_path = path;
+                        return 1;
+                }
+
+                free(path);
+        }
+
+        return 0;
+}
+
+static int unit_find_path(sd_bus *bus, const char *unit_name, const char *template, bool avoid_bus_cache, LookupPaths *lp, char **path) {
+        int r;
+
+        assert(unit_name);
+        assert(path);
+        assert(lp);
+
+        if (!avoid_bus_cache && !unit_name_is_template(unit_name)) {
+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+                _cleanup_free_ char *unit = NULL;
+                _cleanup_free_ char *tmp_path = NULL;
+
+                unit = unit_dbus_path_from_name(unit_name);
+                if (!unit)
+                        return log_oom();
+
+                if (need_daemon_reload(bus, unit_name) > 0) {
+                        warn_unit_file_changed(unit_name);
+                        return 0;
+                }
+
+                r = sd_bus_get_property_string(
+                                bus,
+                                "org.freedesktop.systemd1",
+                                unit,
+                                "org.freedesktop.systemd1.Unit",
+                                "FragmentPath",
+                                &error,
+                                &tmp_path);
+                if (r < 0) {
+                        log_warning("Failed to get FragmentPath: %s", bus_error_message(&error, r));
+                        return 0;
+                }
+
+                if (isempty(tmp_path)) {
+                        log_warning("%s ignored: not found", template);
+                        return 0;
+                }
+
+                *path = tmp_path;
+                tmp_path = NULL;
+
+                return 1;
+        } else {
+                r = unit_file_find_path(lp, template, path);
+                if (r == 0)
+                        log_warning("%s ignored: not found", template);
+                return r;
+        }
+
+        return 0;
+}
+
 typedef struct WaitData {
         Set *set;
 
@@ -2345,32 +2466,44 @@ static int check_wait_response(WaitData *d) {
         assert(d->result);
 
         if (!arg_quiet) {
-                if (streq(d->result, "timeout"))
-                        log_error("Job for %s timed out.", strna(d->name));
-                else if (streq(d->result, "canceled"))
+                if (streq(d->result, "canceled"))
                         log_error("Job for %s canceled.", strna(d->name));
+                else if (streq(d->result, "timeout"))
+                        log_error("Job for %s timed out.", strna(d->name));
                 else if (streq(d->result, "dependency"))
-                        log_error("A dependency job for %s failed. See 'journalctl -xn' for details.", strna(d->name));
+                        log_error("A dependency job for %s failed. See 'journalctl -xe' for details.", strna(d->name));
+                else if (streq(d->result, "invalid"))
+                        log_error("Job for %s invalid.", strna(d->name));
+                else if (streq(d->result, "assert"))
+                        log_error("Assertion failed on job for %s.", strna(d->name));
+                else if (streq(d->result, "unsupported"))
+                        log_error("Operation on or unit type of %s not supported on this system.", strna(d->name));
                 else if (!streq(d->result, "done") && !streq(d->result, "skipped")) {
                         if (d->name) {
                                 bool quotes;
 
                                 quotes = chars_intersect(d->name, SHELL_NEED_QUOTES);
 
-                                log_error("Job for %s failed. See \"systemctl status %s%s%s\" and \"journalctl -xn\" for details.",
+                                log_error("Job for %s failed. See \"systemctl status %s%s%s\" and \"journalctl -xe\" for details.",
                                           d->name,
                                           quotes ? "'" : "", d->name, quotes ? "'" : "");
                         } else
-                                log_error("Job failed. See \"journalctl -xn\" for details.");
+                                log_error("Job failed. See \"journalctl -xe\" for details.");
                 }
         }
 
-        if (streq(d->result, "timeout"))
-                r = -ETIME;
-        else if (streq(d->result, "canceled"))
+        if (streq(d->result, "canceled"))
                 r = -ECANCELED;
+        else if (streq(d->result, "timeout"))
+                r = -ETIME;
         else if (streq(d->result, "dependency"))
                 r = -EIO;
+        else if (streq(d->result, "invalid"))
+                r = -ENOEXEC;
+        else if (streq(d->result, "assert"))
+                r = -EPROTO;
+        else if (streq(d->result, "unsupported"))
+                r = -ENOTSUP;
         else if (!streq(d->result, "done") && !streq(d->result, "skipped"))
                 r = -EIO;
 
@@ -2391,10 +2524,8 @@ static int wait_for_jobs(sd_bus *bus, Set *s) {
 
         while (!set_isempty(s)) {
                 q = bus_process_wait(bus);
-                if (q < 0) {
-                        log_error("Failed to wait for response: %s", strerror(-q));
-                        return q;
-                }
+                if (q < 0)
+                        return log_error_errno(q, "Failed to wait for response: %m");
 
                 if (d.result) {
                         q = check_wait_response(&d);
@@ -2520,10 +2651,8 @@ static int check_triggering_units(
 
         STRV_FOREACH(i, triggered_by) {
                 r = check_one_unit(bus, *i, "active\0reloading\0", true);
-                if (r < 0) {
-                        log_error("Failed to check unit: %s", strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_error_errno(r, "Failed to check unit: %m");
 
                 if (r == 0)
                         continue;
@@ -2539,6 +2668,23 @@ static int check_triggering_units(
         return 0;
 }
 
+static const struct {
+        const char *verb;
+        const char *method;
+} unit_actions[] = {
+        { "start",                 "StartUnit" },
+        { "stop",                  "StopUnit" },
+        { "condstop",              "StopUnit" },
+        { "reload",                "ReloadUnit" },
+        { "restart",               "RestartUnit" },
+        { "try-restart",           "TryRestartUnit" },
+        { "condrestart",           "TryRestartUnit" },
+        { "reload-or-restart",     "ReloadOrRestartUnit" },
+        { "reload-or-try-restart", "ReloadOrTryRestartUnit" },
+        { "condreload",            "ReloadOrTryRestartUnit" },
+        { "force-reload",          "ReloadOrTryRestartUnit" }
+};
+
 static const char *verb_to_method(const char *verb) {
        uint i;
 
@@ -2567,7 +2713,7 @@ static int start_unit_one(
                 sd_bus_error *error,
                 Set *s) {
 
-        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
         const char *path;
         int r;
 
@@ -2577,15 +2723,26 @@ static int start_unit_one(
         assert(error);
 
         log_debug("Calling manager for %s on %s, %s", method, name, mode);
-        r = sd_bus_call_method(
+
+        r = sd_bus_message_new_method_call(
                         bus,
+                        &m,
                         "org.freedesktop.systemd1",
                         "/org/freedesktop/systemd1",
                         "org.freedesktop.systemd1.Manager",
-                        method,
-                        error,
-                        &reply,
-                        "ss", name, mode);
+                        method);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_message_append(m, "ss", name, mode);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_call(bus, m, 0, error, &reply);
         if (r < 0) {
                 const char *verb;
 
@@ -2605,8 +2762,7 @@ static int start_unit_one(
                 return bus_log_parse_error(r);
 
         if (need_daemon_reload(bus, name) > 0)
-                log_warning("Warning: Unit file of %s changed on disk, 'systemctl%s daemon-reload' recommended.",
-                            name, arg_scope == UNIT_FILE_SYSTEM ? "" : " --user");
+                warn_unit_file_changed(name);
 
         if (s) {
                 char *p;
@@ -2704,7 +2860,7 @@ static enum action verb_to_action(const char *verb) {
 static int start_unit(sd_bus *bus, char **args) {
         _cleanup_set_free_free_ Set *s = NULL;
         _cleanup_strv_free_ char **names = NULL;
-        const char *method, *mode, *one_name;
+        const char *method, *mode, *one_name, *suffix = NULL;
         char **name;
         int r = 0;
 
@@ -2717,8 +2873,11 @@ static int start_unit(sd_bus *bus, char **args) {
                 method = verb_to_method(args[0]);
                 action = verb_to_action(args[0]);
 
-                mode = streq(args[0], "isolate") ? "isolate" :
-                       action_table[action].mode ?: arg_job_mode;
+                if (streq(args[0], "isolate")) {
+                        mode = "isolate";
+                        suffix = ".target";
+                } else
+                        mode = action_table[action].mode ?: arg_job_mode;
 
                 one_name = action_table[action].target;
         } else {
@@ -2734,17 +2893,15 @@ static int start_unit(sd_bus *bus, char **args) {
         if (one_name)
                 names = strv_new(one_name, NULL);
         else {
-                r = expand_names(bus, args + 1, NULL, &names);
+                r = expand_names(bus, args + 1, suffix, &names);
                 if (r < 0)
-                        log_error("Failed to expand names: %s", strerror(-r));
+                        log_error_errno(r, "Failed to expand names: %m");
         }
 
         if (!arg_no_block) {
                 r = enable_wait_for_jobs(bus);
-                if (r < 0) {
-                        log_error("Could not watch jobs: %s", strerror(-r));
-                        return r;
-                }
+                if (r < 0)
+                        return log_error_errno(r, "Could not watch jobs: %m");
 
                 s = set_new(&string_hash_ops);
                 if (!s)
@@ -2824,7 +2981,7 @@ static int reboot_with_logind(sd_bus *bus, enum action a) {
                         method,
                         &error,
                         NULL,
-                        "b", true);
+                        "b", arg_ask_password);
         if (r < 0)
                 log_error("Failed to execute operation: %s", bus_error_message(&error, r));
 
@@ -3003,10 +3160,8 @@ static int check_unit_generic(sd_bus *bus, int code, const char *good_states, ch
         assert(args);
 
         r = expand_names(bus, args, NULL, &names);
-        if (r < 0) {
-                log_error("Failed to expand names: %s", strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to expand names: %m");
 
         STRV_FOREACH(name, names) {
                 int state;
@@ -3044,21 +3199,32 @@ static int kill_unit(sd_bus *bus, char **args) {
 
         r = expand_names(bus, args + 1, NULL, &names);
         if (r < 0)
-                log_error("Failed to expand names: %s", strerror(-r));
+                log_error_errno(r, "Failed to expand names: %m");
 
         STRV_FOREACH(name, names) {
-                q = sd_bus_call_method(
+                _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+
+                q = sd_bus_message_new_method_call(
                                 bus,
+                                &m,
                                 "org.freedesktop.systemd1",
                                 "/org/freedesktop/systemd1",
                                 "org.freedesktop.systemd1.Manager",
-                                "KillUnit",
-                                &error,
-                                NULL,
-                                "ssi", *names, arg_kill_who, arg_signal);
+                                "KillUnit");
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_append(m, "ssi", *names, arg_kill_who, arg_signal);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_call(bus, m, 0, &error, NULL);
                 if (q < 0) {
-                        log_error("Failed to kill unit %s: %s",
-                                  *names, bus_error_message(&error, r));
+                        log_error("Failed to kill unit %s: %s", *names, bus_error_message(&error, q));
                         if (r == 0)
                                 r = q;
                 }
@@ -3151,6 +3317,7 @@ typedef struct UnitStatusInfo {
         const char *active_state;
         const char *sub_state;
         const char *unit_file_state;
+        const char *unit_file_preset;
 
         const char *description;
         const char *following;
@@ -3192,7 +3359,14 @@ typedef struct UnitStatusInfo {
         bool failed_condition_trigger;
         bool failed_condition_negate;
         const char *failed_condition;
-        const char *failed_condition_param;
+        const char *failed_condition_parameter;
+
+        usec_t assert_timestamp;
+        bool assert_result;
+        bool failed_assert_trigger;
+        bool failed_assert_negate;
+        const char *failed_assert;
+        const char *failed_assert_parameter;
 
         /* Socket */
         unsigned n_accepted;
@@ -3267,7 +3441,10 @@ static void print_status_info(
         if (i->load_error)
                 printf("   Loaded: %s%s%s (Reason: %s)\n",
                        on, strna(i->load_state), off, i->load_error);
-        else if (path && i->unit_file_state)
+        else if (path && !isempty(i->unit_file_state) && !isempty(i->unit_file_preset))
+                printf("   Loaded: %s%s%s (%s; %s; vendor preset: %s)\n",
+                       on, strna(i->load_state), off, path, i->unit_file_state, i->unit_file_preset);
+        else if (path && !isempty(i->unit_file_state))
                 printf("   Loaded: %s%s%s (%s; %s)\n",
                        on, strna(i->load_state), off, path, i->unit_file_state);
         else if (path)
@@ -3336,7 +3513,8 @@ static void print_status_info(
                 s1 = format_timestamp_relative(since1, sizeof(since1), i->condition_timestamp);
                 s2 = format_timestamp(since2, sizeof(since2), i->condition_timestamp);
 
-                printf("           start condition failed at %s%s%s\n",
+                printf("Condition: start %scondition failed%s at %s%s%s\n",
+                       ansi_highlight_yellow(), ansi_highlight_off(),
                        s2, s1 ? "; " : "", s1 ? s1 : "");
                 if (i->failed_condition_trigger)
                         printf("           none of the trigger conditions were met\n");
@@ -3344,7 +3522,23 @@ static void print_status_info(
                         printf("           %s=%s%s was not met\n",
                                i->failed_condition,
                                i->failed_condition_negate ? "!" : "",
-                               i->failed_condition_param);
+                               i->failed_condition_parameter);
+        }
+
+        if (!i->assert_result && i->assert_timestamp > 0) {
+                s1 = format_timestamp_relative(since1, sizeof(since1), i->assert_timestamp);
+                s2 = format_timestamp(since2, sizeof(since2), i->assert_timestamp);
+
+                printf("   Assert: start %sassertion failed%s at %s%s%s\n",
+                       ansi_highlight_red(), ansi_highlight_off(),
+                       s2, s1 ? "; " : "", s1 ? s1 : "");
+                if (i->failed_assert_trigger)
+                        printf("           none of the trigger assertions were met\n");
+                else if (i->failed_assert)
+                        printf("           %s=%s%s was not met\n",
+                               i->failed_assert,
+                               i->failed_assert_negate ? "!" : "",
+                               i->failed_assert_parameter);
         }
 
         if (i->sysfs_path)
@@ -3409,7 +3603,7 @@ static void print_status_info(
 
         if (i->main_pid > 0 || i->control_pid > 0) {
                 if (i->main_pid > 0) {
-                        printf(" Main PID: %u", (unsigned) i->main_pid);
+                        printf(" Main PID: "PID_FMT, i->main_pid);
 
                         if (i->running) {
                                 _cleanup_free_ char *comm = NULL;
@@ -3440,7 +3634,7 @@ static void print_status_info(
                 if (i->control_pid > 0) {
                         _cleanup_free_ char *c = NULL;
 
-                        printf(" %8s: %u", i->main_pid ? "" : " Control", (unsigned) i->control_pid);
+                        printf(" %8s: "PID_FMT, i->main_pid ? "" : " Control", i->control_pid);
 
                         get_process_comm(i->control_pid, &c);
                         if (c)
@@ -3497,10 +3691,7 @@ static void print_status_info(
         }
 
         if (i->need_daemon_reload)
-                printf("\n%sWarning:%s Unit file changed on disk, 'systemctl %sdaemon-reload' recommended.\n",
-                       ansi_highlight_red(),
-                       ansi_highlight_off(),
-                       arg_scope == UNIT_FILE_SYSTEM ? "" : "--user ");
+                warn_unit_file_changed(i->id);
 }
 
 static void show_unit_help(UnitStatusInfo *i) {
@@ -3575,6 +3766,8 @@ static int status_property(const char *name, sd_bus_message *m, UnitStatusInfo *
                                 i->following = s;
                         else if (streq(name, "UnitFileState"))
                                 i->unit_file_state = s;
+                        else if (streq(name, "UnitFilePreset"))
+                                i->unit_file_preset = s;
                         else if (streq(name, "Result"))
                                 i->result = s;
                 }
@@ -3595,6 +3788,8 @@ static int status_property(const char *name, sd_bus_message *m, UnitStatusInfo *
                         i->need_daemon_reload = b;
                 else if (streq(name, "ConditionResult"))
                         i->condition_result = b;
+                else if (streq(name, "AssertResult"))
+                        i->assert_result = b;
 
                 break;
         }
@@ -3664,6 +3859,8 @@ static int status_property(const char *name, sd_bus_message *m, UnitStatusInfo *
                         i->active_exit_timestamp = (usec_t) u;
                 else if (streq(name, "ConditionTimestamp"))
                         i->condition_timestamp = (usec_t) u;
+                else if (streq(name, "AssertTimestamp"))
+                        i->assert_timestamp = (usec_t) u;
 
                 break;
         }
@@ -3756,7 +3953,32 @@ static int status_property(const char *name, sd_bus_message *m, UnitStatusInfo *
                                         i->failed_condition = cond;
                                         i->failed_condition_trigger = trigger;
                                         i->failed_condition_negate = negate;
-                                        i->failed_condition_param = param;
+                                        i->failed_condition_parameter = param;
+                                }
+                        }
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        r = sd_bus_message_exit_container(m);
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                } else if (contents[1] == SD_BUS_TYPE_STRUCT_BEGIN && streq(name, "Asserts")) {
+                        const char *cond, *param;
+                        int trigger, negate;
+                        int32_t state;
+
+                        r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(sbbsi)");
+                        if (r < 0)
+                                return bus_log_parse_error(r);
+
+                        while ((r = sd_bus_message_read(m, "(sbbsi)", &cond, &trigger, &negate, &param, &state)) > 0) {
+                                log_debug("%s %d %d %s %d", cond, trigger, negate, param, state);
+                                if (state < 0 && (!trigger || !i->failed_assert)) {
+                                        i->failed_assert = cond;
+                                        i->failed_assert_trigger = trigger;
+                                        i->failed_assert_negate = negate;
+                                        i->failed_assert_parameter = param;
                                 }
                         }
                         if (r < 0)
@@ -3828,7 +4050,7 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
                                 return bus_log_parse_error(r);
 
                         if (u > 0)
-                                printf("%s=%u\n", name, (unsigned) u);
+                                printf("%s=%"PRIu32"\n", name, u);
                         else if (arg_all)
                                 printf("%s=\n", name);
 
@@ -3999,14 +4221,14 @@ static int print_property(const char *name, sd_bus_message *m, const char *conte
 
                                 tt = strv_join(info.argv, " ");
 
-                                printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid=%u ; code=%s ; status=%i%s%s }\n",
+                                printf("%s={ path=%s ; argv[]=%s ; ignore_errors=%s ; start_time=[%s] ; stop_time=[%s] ; pid="PID_FMT" ; code=%s ; status=%i%s%s }\n",
                                        name,
                                        strna(info.path),
                                        strna(tt),
                                        yes_no(info.ignore),
                                        strna(format_timestamp(timestamp1, sizeof(timestamp1), info.start_timestamp)),
                                        strna(format_timestamp(timestamp2, sizeof(timestamp2), info.exit_timestamp)),
-                                       (unsigned) info. pid,
+                                       info.pid,
                                        sigchld_code_to_string(info.code),
                                        info.status,
                                        info.code == CLD_EXITED ? "" : "/",
@@ -4303,10 +4525,8 @@ static int show_system_status(sd_bus *bus) {
                 return log_oom();
 
         r = bus_map_all_properties(bus, "org.freedesktop.systemd1", "/org/freedesktop/systemd1", machine_info_property_map, &mi);
-        if (r < 0) {
-                log_error("Failed to read server status: %s", strerror(-r));
-                return r;
-        }
+        if (r < 0)
+                return log_error_errno(r, "Failed to read server status: %m");
 
         if (streq_ptr(mi.state, "degraded")) {
                 on = ansi_highlight_red();
@@ -4423,7 +4643,7 @@ static int show(sd_bus *bus, char **args) {
 
                         r = expand_names(bus, patterns, NULL, &names);
                         if (r < 0)
-                                log_error("Failed to expand names: %s", strerror(-r));
+                                log_error_errno(r, "Failed to expand names: %m");
 
                         STRV_FOREACH(name, names) {
                                 _cleanup_free_ char *unit;
@@ -4449,7 +4669,6 @@ static int show(sd_bus *bus, char **args) {
 }
 
 static int cat(sd_bus *bus, char **args) {
-        _cleanup_free_ char *unit = NULL;
         _cleanup_strv_free_ char **names = NULL;
         char **name;
         bool first = true;
@@ -4460,14 +4679,14 @@ static int cat(sd_bus *bus, char **args) {
 
         r = expand_names(bus, args + 1, NULL, &names);
         if (r < 0)
-                log_error("Failed to expand names: %s", strerror(-r));
+                log_error_errno(r, "Failed to expand names: %m");
 
         pager_open_if_enabled();
 
         STRV_FOREACH(name, names) {
                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
                 _cleanup_strv_free_ char **dropin_paths = NULL;
-                _cleanup_free_ char *fragment_path = NULL;
+                _cleanup_free_ char *fragment_path = NULL, *unit = NULL;
                 char **path;
 
                 unit = unit_dbus_path_from_name(*name);
@@ -4475,8 +4694,7 @@ static int cat(sd_bus *bus, char **args) {
                         return log_oom();
 
                 if (need_daemon_reload(bus, *name) > 0)
-                        log_warning("Unit file of %s changed on disk. Run 'systemctl%s daemon-reload'.",
-                                    *name, arg_scope == UNIT_FILE_SYSTEM ? "" : " --user");
+                        warn_unit_file_changed(*name);
 
                 r = sd_bus_get_property_string(
                                 bus,
@@ -4516,9 +4734,9 @@ static int cat(sd_bus *bus, char **args) {
                                ansi_highlight_off());
                         fflush(stdout);
 
-                        r = sendfile_full(STDOUT_FILENO, fragment_path);
+                        r = copy_file_fd(fragment_path, STDOUT_FILENO, false);
                         if (r < 0) {
-                                log_warning("Failed to cat %s: %s", fragment_path, strerror(-r));
+                                log_warning_errno(r, "Failed to cat %s: %m", fragment_path);
                                 continue;
                         }
                 }
@@ -4531,9 +4749,9 @@ static int cat(sd_bus *bus, char **args) {
                                ansi_highlight_off());
                         fflush(stdout);
 
-                        r = sendfile_full(STDOUT_FILENO, *path);
+                        r = copy_file_fd(*path, STDOUT_FILENO, false);
                         if (r < 0) {
-                                log_warning("Failed to cat %s: %s", *path, strerror(-r));
+                                log_warning_errno(r, "Failed to cat %s: %m", *path);
                                 continue;
                         }
                 }
@@ -4559,6 +4777,10 @@ static int set_property(sd_bus *bus, char **args) {
         if (r < 0)
                 return bus_log_create_error(r);
 
+        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+        if (r < 0)
+                return bus_log_create_error(r);
+
         n = unit_name_mangle(args[1], MANGLE_NOGLOB);
         if (!n)
                 return log_oom();
@@ -4600,7 +4822,7 @@ static int set_property(sd_bus *bus, char **args) {
 
 static int snapshot(sd_bus *bus, char **args) {
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
-        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
         _cleanup_free_ char *n = NULL, *id = NULL;
         const char *path;
         int r;
@@ -4612,15 +4834,25 @@ static int snapshot(sd_bus *bus, char **args) {
         if (!n)
                 return log_oom();
 
-        r = sd_bus_call_method(
+        r = sd_bus_message_new_method_call(
                         bus,
+                        &m,
                         "org.freedesktop.systemd1",
                         "/org/freedesktop/systemd1",
                         "org.freedesktop.systemd1.Manager",
-                        "CreateSnapshot",
-                        &error,
-                        &reply,
-                        "sb", n, false);
+                        "CreateSnapshot");
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_message_append(m, "sb", n, false);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_call(bus, m, 0, &error, &reply);
         if (r < 0) {
                 log_error("Failed to create snapshot: %s", bus_error_message(&error, r));
                 return r;
@@ -4653,28 +4885,40 @@ static int delete_snapshot(sd_bus *bus, char **args) {
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
         _cleanup_strv_free_ char **names = NULL;
         char **name;
-        int r, q;
+        int r;
 
         assert(args);
 
         r = expand_names(bus, args + 1, ".snapshot", &names);
         if (r < 0)
-                log_error("Failed to expand names: %s", strerror(-r));
+                log_error_errno(r, "Failed to expand names: %m");
 
         STRV_FOREACH(name, names) {
-                q = sd_bus_call_method(
+                _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+                int q;
+
+                q = sd_bus_message_new_method_call(
                                 bus,
+                                &m,
                                 "org.freedesktop.systemd1",
                                 "/org/freedesktop/systemd1",
                                 "org.freedesktop.systemd1.Manager",
-                                "RemoveSnapshot",
-                                &error,
-                                NULL,
-                                "s", *name);
-                if (q < 0) {
-                        log_error("Failed to remove snapshot %s: %s",
-                                  *name, bus_error_message(&error, r));
-                        if (r == 0)
+                                "RemoveSnapshot");
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_append(m, "s", *name);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_call(bus, m, 0, &error, NULL);
+                if (q < 0) {
+                        log_error("Failed to remove snapshot %s: %s", *name, bus_error_message(&error, q));
+                        if (r == 0)
                                 r = q;
                 }
         }
@@ -4684,6 +4928,7 @@ static int delete_snapshot(sd_bus *bus, char **args) {
 
 static int daemon_reload(sd_bus *bus, char **args) {
         _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+        _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
         const char *method;
         int r;
 
@@ -4707,16 +4952,21 @@ static int daemon_reload(sd_bus *bus, char **args) {
                                     /* "daemon-reload" */ "Reload";
         }
 
-        r = sd_bus_call_method(
+        r = sd_bus_message_new_method_call(
                         bus,
+                        &m,
                         "org.freedesktop.systemd1",
                         "/org/freedesktop/systemd1",
                         "org.freedesktop.systemd1.Manager",
-                        method,
-                        &error,
-                        NULL,
-                        NULL);
+                        method);
+        if (r < 0)
+                return bus_log_create_error(r);
 
+        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+        if (r < 0)
+                return bus_log_create_error(r);
+
+        r = sd_bus_call(bus, m, 0, &error, NULL);
         if (r == -ENOENT && arg_action != ACTION_SYSTEMCTL)
                 /* There's always a fallback possible for
                  * legacy actions. */
@@ -4742,21 +4992,32 @@ static int reset_failed(sd_bus *bus, char **args) {
 
         r = expand_names(bus, args + 1, NULL, &names);
         if (r < 0)
-                log_error("Failed to expand names: %s", strerror(-r));
+                log_error_errno(r, "Failed to expand names: %m");
 
         STRV_FOREACH(name, names) {
-                q = sd_bus_call_method(
+                _cleanup_bus_message_unref_ sd_bus_message *m = NULL;
+
+                q = sd_bus_message_new_method_call(
                                 bus,
+                                &m,
                                 "org.freedesktop.systemd1",
                                 "/org/freedesktop/systemd1",
                                 "org.freedesktop.systemd1.Manager",
-                                "ResetFailedUnit",
-                                &error,
-                                NULL,
-                                "s", *name);
+                                "ResetFailedUnit");
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_message_append(m, "s", *name);
+                if (q < 0)
+                        return bus_log_create_error(q);
+
+                q = sd_bus_call(bus, m, 0, &error, NULL);
                 if (q < 0) {
-                        log_error("Failed to reset failed state of unit %s: %s",
-                                  *name, bus_error_message(&error, r));
+                        log_error("Failed to reset failed state of unit %s: %s", *name, bus_error_message(&error, q));
                         if (r == 0)
                                 r = q;
                 }
@@ -4825,7 +5086,7 @@ static int switch_root(sd_bus *bus, char **args) {
                                    "init", &cmdline_init,
                                    NULL);
                 if (r < 0)
-                        log_debug("Failed to parse /proc/cmdline: %s", strerror(-r));
+                        log_debug_errno(r, "Failed to parse /proc/cmdline: %m");
 
                 init = cmdline_init;
         }
@@ -4887,6 +5148,10 @@ static int set_environment(sd_bus *bus, char **args) {
         if (r < 0)
                 return bus_log_create_error(r);
 
+        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+        if (r < 0)
+                return bus_log_create_error(r);
+
         r = sd_bus_message_append_strv(m, args + 1);
         if (r < 0)
                 return bus_log_create_error(r);
@@ -4918,6 +5183,10 @@ static int import_environment(sd_bus *bus, char **args) {
         if (r < 0)
                 return bus_log_create_error(r);
 
+        r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+        if (r < 0)
+                return bus_log_create_error(r);
+
         if (strv_isempty(args + 1))
                 r = sd_bus_message_append_strv(m, environ);
         else {
@@ -4967,7 +5236,7 @@ static int enable_sysv_units(const char *verb, char **args) {
         int r = 0;
 
 #if defined(HAVE_SYSV_COMPAT) && defined(HAVE_CHKCONFIG)
-        unsigned f = 1, t = 1;
+        unsigned f = 0;
         _cleanup_lookup_paths_free_ LookupPaths paths = {};
 
         if (arg_scope != UNIT_FILE_SYSTEM)
@@ -4986,7 +5255,7 @@ static int enable_sysv_units(const char *verb, char **args) {
                 return r;
 
         r = 0;
-        for (f = 0; args[f]; f++) {
+        while (args[f]) {
                 const char *name;
                 _cleanup_free_ char *p = NULL, *q = NULL, *l = NULL;
                 bool found_native = false, found_sysv;
@@ -4997,7 +5266,7 @@ static int enable_sysv_units(const char *verb, char **args) {
                 pid_t pid;
                 siginfo_t status;
 
-                name = args[f];
+                name = args[f++];
 
                 if (!endswith(name, ".service"))
                         continue;
@@ -5029,9 +5298,6 @@ static int enable_sysv_units(const char *verb, char **args) {
                 if (!found_sysv)
                         continue;
 
-                /* Mark this entry, so that we don't try enabling it as native unit */
-                args[f] = (char*) "";
-
                 log_info("%s is not a native service, redirecting to /sbin/chkconfig.", name);
 
                 if (!isempty(arg_root))
@@ -5050,10 +5316,9 @@ static int enable_sysv_units(const char *verb, char **args) {
                 log_info("Executing %s", l);
 
                 pid = fork();
-                if (pid < 0) {
-                        log_error("Failed to fork: %m");
-                        return -errno;
-                } else if (pid == 0) {
+                if (pid < 0)
+                        return log_error_errno(errno, "Failed to fork: %m");
+                else if (pid == 0) {
                         /* Child */
 
                         execv(argv[0], (char**) argv);
@@ -5062,7 +5327,7 @@ static int enable_sysv_units(const char *verb, char **args) {
 
                 j = wait_for_terminate(pid, &status);
                 if (j < 0) {
-                        log_error("Failed to wait for child: %s", strerror(-r));
+                        log_error_errno(r, "Failed to wait for child: %m");
                         return j;
                 }
 
@@ -5081,19 +5346,12 @@ static int enable_sysv_units(const char *verb, char **args) {
                                 return -EINVAL;
                 } else
                         return -EPROTO;
-        }
-
-        /* Drop all SysV units */
-        for (f = 0, t = 0; args[f]; f++) {
 
-                if (isempty(args[f]))
-                        continue;
-
-                args[t++] = args[f];
+                /* Remove this entry, so that we don't try enabling it as native unit */
+                assert(f > 0 && streq(args[f-1], name));
+                assert_se(strv_remove(args + f - 1, name));
         }
 
-        args[t] = NULL;
-
 #endif
         return r;
 }
@@ -5176,7 +5434,7 @@ static int enable_unit(sd_bus *bus, char **args) {
                         assert_not_reached("Unknown verb");
 
                 if (r < 0) {
-                        log_error("Operation failed: %s", strerror(-r));
+                        log_error_errno(r, "Operation failed: %m");
                         goto finish;
                 }
 
@@ -5229,6 +5487,10 @@ static int enable_unit(sd_bus *bus, char **args) {
                 if (r < 0)
                         return bus_log_create_error(r);
 
+                r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
                 r = sd_bus_message_append_strv(m, names);
                 if (r < 0)
                         return bus_log_create_error(r);
@@ -5289,6 +5551,90 @@ finish:
         return r;
 }
 
+static int add_dependency(sd_bus *bus, char **args) {
+        _cleanup_strv_free_ char **names = NULL;
+        _cleanup_free_ char *target = NULL;
+        const char *verb = args[0];
+        UnitDependency dep;
+        int r = 0;
+
+        if (!args[1])
+                return 0;
+
+        target = unit_name_mangle_with_suffix(args[1], MANGLE_NOGLOB, ".target");
+        if (!target)
+                return log_oom();
+
+        r = mangle_names(args+2, &names);
+        if (r < 0)
+                return r;
+
+        if (streq(verb, "add-wants"))
+                dep = UNIT_WANTS;
+        else if (streq(verb, "add-requires"))
+                dep = UNIT_REQUIRES;
+        else
+                assert_not_reached("Unknown verb");
+
+        if (!bus || avoid_bus()) {
+                UnitFileChange *changes = NULL;
+                unsigned n_changes = 0;
+
+                r = unit_file_add_dependency(arg_scope, arg_runtime, arg_root, names, target, dep, arg_force, &changes, &n_changes);
+
+                if (r < 0)
+                        return log_error_errno(r, "Can't add dependency: %m");
+
+                if (!arg_quiet)
+                        dump_unit_file_changes(changes, n_changes);
+
+                unit_file_changes_free(changes, n_changes);
+
+        } else {
+                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL, *m = NULL;
+                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
+                r = sd_bus_message_new_method_call(
+                                bus,
+                                &m,
+                                "org.freedesktop.systemd1",
+                                "/org/freedesktop/systemd1",
+                                "org.freedesktop.systemd1.Manager",
+                                "AddDependencyUnitFiles");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_append_strv(m, names);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_append(m, "ssbb", target, unit_dependency_to_string(dep), arg_runtime, arg_force);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_call(bus, m, 0, &error, &reply);
+                if (r < 0) {
+                        log_error("Failed to execute operation: %s", bus_error_message(&error, r));
+                        return r;
+                }
+
+                r = deserialize_and_dump_unit_file_changes(reply);
+                if (r < 0)
+                        return r;
+
+                if (!arg_no_reload)
+                        r = daemon_reload(bus, args);
+                else
+                        r = 0;
+        }
+
+        return r;
+}
+
 static int preset_all(sd_bus *bus, char **args) {
         UnitFileChange *changes = NULL;
         unsigned n_changes = 0;
@@ -5298,7 +5644,7 @@ static int preset_all(sd_bus *bus, char **args) {
 
                 r = unit_file_preset_all(arg_scope, arg_runtime, arg_root, arg_preset_mode, arg_force, &changes, &n_changes);
                 if (r < 0) {
-                        log_error("Operation failed: %s", strerror(-r));
+                        log_error_errno(r, "Operation failed: %m");
                         goto finish;
                 }
 
@@ -5308,21 +5654,33 @@ static int preset_all(sd_bus *bus, char **args) {
                 r = 0;
 
         } else {
-                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+                _cleanup_bus_message_unref_ sd_bus_message *m = NULL, *reply = NULL;
                 _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
 
-                r = sd_bus_call_method(
+                r = sd_bus_message_new_method_call(
                                 bus,
+                                &m,
                                 "org.freedesktop.systemd1",
                                 "/org/freedesktop/systemd1",
                                 "org.freedesktop.systemd1.Manager",
-                                "PresetAllUnitFiles",
-                                &error,
-                                &reply,
+                                "PresetAllUnitFiles");
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_set_allow_interactive_authorization(m, arg_ask_password);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_message_append(
+                                m,
                                 "sbb",
                                 unit_file_preset_mode_to_string(arg_preset_mode),
                                 arg_runtime,
                                 arg_force);
+                if (r < 0)
+                        return bus_log_create_error(r);
+
+                r = sd_bus_call(bus, m, 0, &error, &reply);
                 if (r < 0) {
                         log_error("Failed to execute operation: %s", bus_error_message(&error, r));
                         return r;
@@ -5368,14 +5726,13 @@ static int unit_is_enabled(sd_bus *bus, char **args) {
                         UnitFileState state;
 
                         state = unit_file_get_state(arg_scope, arg_root, *name);
-                        if (state < 0) {
-                                log_error("Failed to get unit file state for %s: %s", *name, strerror(-state));
-                                return state;
-                        }
+                        if (state < 0)
+                                return log_error_errno(state, "Failed to get unit file state for %s: %m", *name);
 
                         if (state == UNIT_FILE_ENABLED ||
                             state == UNIT_FILE_ENABLED_RUNTIME ||
-                            state == UNIT_FILE_STATIC)
+                            state == UNIT_FILE_STATIC ||
+                            state == UNIT_FILE_INDIRECT)
                                 enabled = true;
 
                         if (!arg_quiet)
@@ -5405,9 +5762,7 @@ static int unit_is_enabled(sd_bus *bus, char **args) {
                         if (r < 0)
                                 return bus_log_parse_error(r);
 
-                        if (streq(s, "enabled") ||
-                            streq(s, "enabled-runtime") ||
-                            streq(s, "static"))
+                        if (STR_IN_SET(s, "enabled", "enabled-runtime", "static", "indirect"))
                                 enabled = true;
 
                         if (!arg_quiet)
@@ -5442,6 +5797,435 @@ static int is_system_running(sd_bus *bus, char **args) {
         return streq(state, "running") ? EXIT_SUCCESS : EXIT_FAILURE;
 }
 
+static int create_edit_temp_file(const char *new_path, const char *original_path, char **ret_tmp_fn) {
+        char *t;
+        int r;
+
+        assert(new_path);
+        assert(original_path);
+        assert(ret_tmp_fn);
+
+        r = tempfn_random(new_path, &t);
+        if (r < 0)
+                return log_error_errno(r, "Failed to determine temporary filename for %s: %m", new_path);
+
+        r = mkdir_parents(new_path, 0755);
+        if (r < 0) {
+                log_error_errno(r, "Failed to create directories for %s: %m", new_path);
+                free(t);
+                return r;
+        }
+
+        r = copy_file(original_path, t, 0, 0644);
+        if (r == -ENOENT) {
+                r = touch(t);
+                if (r < 0) {
+                        log_error_errno(r, "Failed to create temporary file %s: %m", t);
+                        free(t);
+                        return r;
+                }
+        } else if (r < 0) {
+                log_error_errno(r, "Failed to copy %s to %s: %m", original_path, t);
+                free(t);
+                return r;
+        }
+
+        *ret_tmp_fn = t;
+
+        return 0;
+}
+
+static int get_drop_in_to_edit(const char *unit_name, const char *user_home, const char *user_runtime, char **ret_path) {
+        char *tmp_new_path;
+        char *tmp;
+
+        assert(unit_name);
+        assert(ret_path);
+
+        switch (arg_scope) {
+                case UNIT_FILE_SYSTEM:
+                        tmp = strappenda(arg_runtime ? "/run/systemd/system/" : SYSTEM_CONFIG_UNIT_PATH "/", unit_name, ".d/override.conf");
+                        break;
+                case UNIT_FILE_GLOBAL:
+                        tmp = strappenda(arg_runtime ? "/run/systemd/user/" : USER_CONFIG_UNIT_PATH "/", unit_name, ".d/override.conf");
+                        break;
+                case UNIT_FILE_USER:
+                        assert(user_home);
+                        assert(user_runtime);
+
+                        tmp = strappenda(arg_runtime ? user_runtime : user_home, "/", unit_name, ".d/override.conf");
+                        break;
+                default:
+                        assert_not_reached("Invalid scope");
+        }
+
+        tmp_new_path = path_join(arg_root, tmp, NULL);
+        if (!tmp_new_path)
+                return log_oom();
+
+        *ret_path = tmp_new_path;
+
+        return 0;
+}
+
+static int unit_file_create_drop_in(const char *unit_name, const char *user_home, const char *user_runtime, char **ret_new_path, char **ret_tmp_path) {
+        char *tmp_new_path;
+        char *tmp_tmp_path;
+        int r;
+
+        assert(unit_name);
+        assert(ret_new_path);
+        assert(ret_tmp_path);
+
+        r = get_drop_in_to_edit(unit_name, user_home, user_runtime, &tmp_new_path);
+        if (r < 0)
+                return r;
+
+        r = create_edit_temp_file(tmp_new_path, tmp_new_path, &tmp_tmp_path);
+        if (r < 0) {
+                free(tmp_new_path);
+                return r;
+        }
+
+        *ret_new_path = tmp_new_path;
+        *ret_tmp_path = tmp_tmp_path;
+
+        return 0;
+}
+
+static bool unit_is_editable(const char *unit_name, const char *fragment_path, const char *user_home) {
+        bool editable = true;
+        const char *invalid_path;
+
+        assert(unit_name);
+
+        if (!arg_runtime)
+                return true;
+
+        switch (arg_scope) {
+                case UNIT_FILE_SYSTEM:
+                        if (path_startswith(fragment_path, "/etc/systemd/system")) {
+                                editable = false;
+                                invalid_path = "/etc/systemd/system";
+                        } else if (path_startswith(fragment_path, SYSTEM_CONFIG_UNIT_PATH)) {
+                                editable = false;
+                                invalid_path = SYSTEM_CONFIG_UNIT_PATH;
+                        }
+                        break;
+                case UNIT_FILE_GLOBAL:
+                        if (path_startswith(fragment_path, "/etc/systemd/user")) {
+                                editable = false;
+                                invalid_path = "/etc/systemd/user";
+                        } else if (path_startswith(fragment_path, USER_CONFIG_UNIT_PATH)) {
+                                editable = false;
+                                invalid_path = USER_CONFIG_UNIT_PATH;
+                        }
+                        break;
+                case UNIT_FILE_USER:
+                        assert(user_home);
+
+                        if (path_startswith(fragment_path, "/etc/systemd/user")) {
+                                editable = false;
+                                invalid_path = "/etc/systemd/user";
+                        } else if (path_startswith(fragment_path, USER_CONFIG_UNIT_PATH)) {
+                                editable = false;
+                                invalid_path = USER_CONFIG_UNIT_PATH;
+                        } else if (path_startswith(fragment_path, user_home)) {
+                                editable = false;
+                                invalid_path = user_home;
+                        }
+                        break;
+                default:
+                        assert_not_reached("Invalid scope");
+        }
+
+        if (!editable)
+                log_error("%s ignored: cannot temporarily edit units from %s", unit_name, invalid_path);
+
+        return editable;
+}
+
+static int get_copy_to_edit(const char *unit_name, const char *fragment_path, const char *user_home, const char *user_runtime, char **ret_path) {
+        char *tmp_new_path;
+
+        assert(unit_name);
+        assert(ret_path);
+
+        if (!unit_is_editable(unit_name, fragment_path, user_home))
+                return -EINVAL;
+
+        switch (arg_scope) {
+                case UNIT_FILE_SYSTEM:
+                        tmp_new_path = path_join(arg_root, arg_runtime ? "/run/systemd/system/" : SYSTEM_CONFIG_UNIT_PATH, unit_name);
+                        break;
+                case UNIT_FILE_GLOBAL:
+                        tmp_new_path = path_join(arg_root, arg_runtime ? "/run/systemd/user/" : USER_CONFIG_UNIT_PATH, unit_name);
+                        break;
+                case UNIT_FILE_USER:
+                        assert(user_home);
+                        assert(user_runtime);
+
+                        tmp_new_path = path_join(arg_root, arg_runtime ? user_runtime : user_home, unit_name);
+                        break;
+                default:
+                        assert_not_reached("Invalid scope");
+        }
+        if (!tmp_new_path)
+                return log_oom();
+
+        *ret_path = tmp_new_path;
+
+        return 0;
+}
+
+static int unit_file_create_copy(const char *unit_name,
+                                 const char *fragment_path,
+                                 const char *user_home,
+                                 const char *user_runtime,
+                                 char **ret_new_path,
+                                 char **ret_tmp_path) {
+        char *tmp_new_path;
+        char *tmp_tmp_path;
+        int r;
+
+        assert(fragment_path);
+        assert(unit_name);
+        assert(ret_new_path);
+        assert(ret_tmp_path);
+
+        r = get_copy_to_edit(unit_name, fragment_path, user_home, user_runtime, &tmp_new_path);
+        if (r < 0)
+                return r;
+
+        if (!path_equal(fragment_path, tmp_new_path) && access(tmp_new_path, F_OK) == 0) {
+                char response;
+
+                r = ask_char(&response, "yn", "%s already exists, are you sure to overwrite it with %s? [(y)es, (n)o] ", tmp_new_path, fragment_path);
+                if (r < 0) {
+                        free(tmp_new_path);
+                        return r;
+                }
+                if (response != 'y') {
+                        log_warning("%s ignored", unit_name);
+                        free(tmp_new_path);
+                        return -1;
+                }
+        }
+
+        r = create_edit_temp_file(tmp_new_path, fragment_path, &tmp_tmp_path);
+        if (r < 0) {
+                log_error_errno(r, "Failed to create temporary file for %s: %m", tmp_new_path);
+                free(tmp_new_path);
+                return r;
+        }
+
+        *ret_new_path = tmp_new_path;
+        *ret_tmp_path = tmp_tmp_path;
+
+        return 0;
+}
+
+static int run_editor(char **paths) {
+        pid_t pid;
+        int r;
+
+        assert(paths);
+
+        pid = fork();
+        if (pid < 0) {
+                log_error_errno(errno, "Failed to fork: %m");
+                return -errno;
+        }
+
+        if (pid == 0) {
+                const char **args;
+                char **backup_editors = STRV_MAKE("nano", "vim", "vi");
+                char *editor;
+                char **tmp_path, **original_path, **p;
+                unsigned i = 1;
+                size_t argc;
+
+                argc = strv_length(paths)/2 + 1;
+                args = newa(const char*, argc + 1);
+
+                args[0] = NULL;
+                STRV_FOREACH_PAIR(original_path, tmp_path, paths) {
+                        args[i] = *tmp_path;
+                        i++;
+                }
+                args[argc] = NULL;
+
+                /* SYSTEMD_EDITOR takes precedence over EDITOR which takes precedence over VISUAL
+                 * If neither SYSTEMD_EDITOR nor EDITOR nor VISUAL are present,
+                 * we try to execute well known editors
+                 */
+                editor = getenv("SYSTEMD_EDITOR");
+                if (!editor)
+                        editor = getenv("EDITOR");
+                if (!editor)
+                        editor = getenv("VISUAL");
+
+                if (!isempty(editor)) {
+                        args[0] = editor;
+                        execvp(editor, (char* const*) args);
+                }
+
+                STRV_FOREACH(p, backup_editors) {
+                        args[0] = *p;
+                        execvp(*p, (char* const*) args);
+                        /* We do not fail if the editor doesn't exist
+                         * because we want to try each one of them before
+                         * failing.
+                         */
+                        if (errno != ENOENT) {
+                                log_error("Failed to execute %s: %m", editor);
+                                _exit(EXIT_FAILURE);
+                        }
+                }
+
+                log_error("Cannot edit unit(s): No editor available. Please set either SYSTEMD_EDITOR or EDITOR or VISUAL environment variable");
+                _exit(EXIT_FAILURE);
+        }
+
+        r = wait_for_terminate_and_warn("editor", pid, true);
+        if (r < 0)
+                return log_error_errno(r, "Failed to wait for child: %m");
+
+        return r;
+}
+
+static int find_paths_to_edit(sd_bus *bus, char **names, char ***paths) {
+        _cleanup_free_ char *user_home = NULL;
+        _cleanup_free_ char *user_runtime = NULL;
+        _cleanup_lookup_paths_free_ LookupPaths lp = {};
+        bool avoid_bus_cache;
+        char **name;
+        int r;
+
+        assert(names);
+        assert(paths);
+
+        if (arg_scope == UNIT_FILE_USER) {
+                r = user_config_home(&user_home);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to query XDG_CONFIG_HOME: %m");
+                else if (r == 0)
+                        return log_error_errno(ENOTDIR, "Cannot edit units: $XDG_CONFIG_HOME and $HOME are not set.");
+
+                r = user_runtime_dir(&user_runtime);
+                if (r < 0)
+                        return log_error_errno(r, "Failed to query XDG_CONFIG_HOME: %m");
+                else if (r == 0)
+                        return log_error_errno(ENOTDIR, "Cannot edit units: $XDG_RUNTIME_DIR is not set.");
+        }
+
+        r = lookup_paths_init(&lp,
+                              arg_scope == UNIT_FILE_SYSTEM ? SYSTEMD_SYSTEM : SYSTEMD_USER,
+                              arg_scope == UNIT_FILE_USER,
+                              arg_root,
+                              NULL, NULL, NULL);
+        if (r < 0)
+                return log_error_errno(r, "Failed get lookup paths: %m");
+
+        avoid_bus_cache = !bus || avoid_bus();
+
+        STRV_FOREACH(name, names) {
+                _cleanup_free_ char *path = NULL;
+                _cleanup_free_ char *template = NULL;
+                char *new_path, *tmp_path;
+
+                template = unit_name_template(*name);
+                if (!template)
+                        return log_oom();
+
+                r = unit_find_path(bus, *name, template, avoid_bus_cache, &lp, &path);
+                if (r < 0)
+                        return r;
+                else if (r == 0) {
+                        continue;
+                }
+
+                if (arg_full)
+                        r = unit_file_create_copy(template, path, user_home, user_runtime, &new_path, &tmp_path);
+                else
+                        r = unit_file_create_drop_in(template, user_home, user_runtime, &new_path, &tmp_path);
+
+                if (r < 0)
+                        continue;
+
+                r = strv_push_pair(paths, new_path, tmp_path);
+                if (r < 0)
+                        return log_oom();
+        }
+
+        return 0;
+}
+
+static int edit(sd_bus *bus, char **args) {
+        _cleanup_strv_free_ char **names = NULL;
+        _cleanup_strv_free_ char **paths = NULL;
+        char **original, **tmp;
+        int r;
+
+        assert(args);
+
+        if (!on_tty()) {
+                log_error("Cannot edit units if we are not on a tty");
+                return -EINVAL;
+        }
+
+        if (arg_transport != BUS_TRANSPORT_LOCAL) {
+                log_error("Cannot remotely edit units");
+                return -EINVAL;
+        }
+
+        r = expand_names(bus, args + 1, NULL, &names);
+        if (r < 0)
+                return log_error_errno(r, "Failed to expand names: %m");
+
+        if (!names) {
+                log_error("No unit name found by expanding names");
+                return -ENOENT;
+        }
+
+        r = find_paths_to_edit(bus, names, &paths);
+        if (r < 0)
+                return r;
+
+        if (strv_isempty(paths)) {
+                log_error("Cannot find any units to edit");
+                return -ENOENT;
+        }
+
+        r = run_editor(paths);
+        if (r < 0)
+                goto end;
+
+        STRV_FOREACH_PAIR(original, tmp, paths) {
+                /* If the temporary file is empty we ignore it.
+                 * It's useful if the user wants to cancel its modification
+                 */
+                if (null_or_empty_path(*tmp)) {
+                        log_warning("Edition of %s canceled: temporary file empty", *original);
+                        continue;
+                }
+                r = rename(*tmp, *original);
+                if (r < 0) {
+                        r = log_error_errno(errno, "Failed to rename %s to %s: %m", *tmp, *original);
+                        goto end;
+                }
+        }
+
+        if (!arg_no_reload && bus && !avoid_bus())
+                r = daemon_reload(bus, args);
+
+end:
+        STRV_FOREACH_PAIR(original, tmp, paths)
+                unlink_noerrno(*tmp);
+
+        return r;
+}
+
 static void systemctl_help(void) {
 
         pager_open_if_enabled();
@@ -5534,8 +6318,14 @@ static void systemctl_help(void) {
                "  unmask NAME...                  Unmask one or more units\n"
                "  link PATH...                    Link one or more units files into\n"
                "                                  the search path\n"
+               "  add-wants TARGET NAME...        Add 'Wants' dependency for the target\n"
+               "                                  on specified one or more units\n"
+               "  add-requires TARGET NAME...     Add 'Requires' dependency for the target\n"
+               "                                  on specified one or more units\n"
                "  get-default                     Get the name of the default target\n"
-               "  set-default NAME                Set the default target\n\n"
+               "  set-default NAME                Set the default target\n"
+               "  edit NAME...                    Edit one or more unit files\n"
+               "\n"
                "Machine Commands:\n"
                "  list-machines [PATTERN...]      List local containers and host\n\n"
                "Job Commands:\n"
@@ -6451,16 +7241,13 @@ static int talk_initctl(void) {
                 if (errno == ENOENT)
                         return 0;
 
-                log_error("Failed to open "INIT_FIFO": %m");
+                log_error_errno(errno, "Failed to open "INIT_FIFO": %m");
                 return -errno;
         }
 
-        errno = 0;
-        r = loop_write(fd, &request, sizeof(request), false) != sizeof(request);
-        if (r) {
-                log_error("Failed to write to "INIT_FIFO": %m");
-                return errno > 0 ? -errno : -EIO;
-        }
+        r = loop_write(fd, &request, sizeof(request), false);
+        if (r < 0)
+                return log_error_errno(r, "Failed to write to "INIT_FIFO": %m");
 
         return 1;
 }
@@ -6544,6 +7331,9 @@ static int systemctl_main(sd_bus *bus, int argc, char *argv[], int bus_error) {
                 { "get-default",           EQUAL, 1, get_default,      NOBUS },
                 { "set-property",          MORE,  3, set_property      },
                 { "is-system-running",     EQUAL, 1, is_system_running },
+                { "add-wants",             MORE,  3, add_dependency,   NOBUS },
+                { "add-requires",          MORE,  3, add_dependency,   NOBUS },
+                { "edit",                  MORE,  2, edit,             NOBUS },
                 {}
         }, *verb = verbs;
 
@@ -6605,7 +7395,7 @@ found:
          * enable/disable */
         if (verb->bus == NOBUS) {
                 if (!bus && !avoid_bus()) {
-                        log_error("Failed to get D-Bus connection: %s", strerror(-bus_error));
+                        log_error_errno(bus_error, "Failed to get D-Bus connection: %m");
                         return -EIO;
                 }
 
@@ -6616,7 +7406,7 @@ found:
                 }
 
                 if ((verb->bus != FORCE || arg_force <= 0) && !bus) {
-                        log_error("Failed to get D-Bus connection: %s", strerror(-bus_error));
+                        log_error_errno(bus_error, "Failed to get D-Bus connection: %m");
                         return -EIO;
                 }
         }
@@ -6680,10 +7470,8 @@ static int reload_with_fallback(sd_bus *bus) {
         /* Nothing else worked, so let's try signals */
         assert(arg_action == ACTION_RELOAD || arg_action == ACTION_REEXEC);
 
-        if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0) {
-                log_error("kill() failed: %m");
-                return -errno;
-        }
+        if (kill(1, arg_action == ACTION_RELOAD ? SIGHUP : SIGTERM) < 0)
+                return log_error_errno(errno, "kill() failed: %m");
 
         return 0;
 }
@@ -6711,8 +7499,13 @@ done:
 
 static int halt_now(enum action a) {
 
-/* Make sure C-A-D is handled by the kernel from this
-         * point on... */
+        /* The kernel will automaticall flush ATA disks and suchlike
+         * on reboot(), but the file systems need to be synce'd
+         * explicitly in advance. */
+        sync();
+
+        /* Make sure C-A-D is handled by the kernel from this point
+         * on... */
         reboot(RB_ENABLE_CAD);
 
         switch (a) {
@@ -6789,7 +7582,7 @@ static int halt_main(sd_bus *bus) {
                                    m);
 
                 if (r < 0)
-                        log_warning("Failed to talk to shutdownd, proceeding with immediate shutdown: %s", strerror(-r));
+                        log_warning_errno(r, "Failed to talk to shutdownd, proceeding with immediate shutdown: %m");
                 else {
                         char date[FORMAT_TIMESTAMP_MAX];
 
@@ -6808,7 +7601,7 @@ static int halt_main(sd_bus *bus) {
                 else {
                         r = utmp_put_shutdown();
                         if (r < 0)
-                                log_warning("Failed to write utmp record: %s", strerror(-r));
+                                log_warning_errno(r, "Failed to write utmp record: %m");
                 }
         }
 
@@ -6816,7 +7609,7 @@ static int halt_main(sd_bus *bus) {
                 return 0;
 
         r = halt_now(arg_action);
-        log_error("Failed to reboot: %s", strerror(-r));
+        log_error_errno(r, "Failed to reboot: %m");
 
         return r;
 }
@@ -6914,7 +7707,7 @@ int main(int argc, char*argv[]) {
 
                 r = send_shutdownd(arg_when, SD_SHUTDOWN_NONE, false, !arg_no_wall, m);
                 if (r < 0)
-                        log_warning("Failed to talk to shutdownd, shutdown hasn't been cancelled: %s", strerror(-r));
+                        log_warning_errno(r, "Failed to talk to shutdownd, shutdown hasn't been cancelled: %m");
                 break;
         }