systemctl: fold systemd-install into systemctl

2 files changed, 822 insertions, 1248 deletions

diff --git a/src/install.c b/src/install.c
deleted file mode 100644
index 2d6316aa8f..0000000000
--- a/src/install.c
+++ /dev/null
@@ -1,1165 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8 -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU General Public License as published by
-  the Free Software Foundation; either version 2 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  General Public License for more details.
-
-  You should have received a copy of the GNU General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/stat.h>
-#include <stdio.h>
-#include <getopt.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <dirent.h>
-
-#include "log.h"
-#include "path-lookup.h"
-#include "util.h"
-#include "macro.h"
-#include "strv.h"
-#include "conf-parser.h"
-#include "dbus-common.h"
-#include "sd-daemon.h"
-
-static bool arg_force = false;
-static bool arg_all = false;
-static bool arg_verbose = false;
-
-static enum {
-        WHERE_SYSTEM,
-        WHERE_SESSION,
-        WHERE_GLOBAL,
-} arg_where = WHERE_SYSTEM;
-
-static enum {
-        ACTION_INVALID,
-        ACTION_ENABLE,
-        ACTION_DISABLE,
-        ACTION_REALIZE,
-        ACTION_TEST
-} arg_action = ACTION_INVALID;
-
-static enum {
-        REALIZE_NO,        /* Don't reload/start/stop or anything */
-        REALIZE_RELOAD,    /* Only reload daemon config, don't stop/start */
-        REALIZE_MINIMAL,   /* Only shutdown/restart if running. */
-        REALIZE_MAYBE,     /* Start if WantedBy= suggests */
-        REALIZE_YES        /* Start unconditionally */
-} arg_realize = REALIZE_NO;
-
-typedef struct {
-        char *name;
-        char *path;
-
-        char **aliases;
-        char **wanted_by;
-} InstallInfo;
-
-static Hashmap *will_install = NULL, *have_installed = NULL;
-static Set *remove_symlinks_to = NULL;
-
-static int help(void) {
-
-        printf("%s [OPTIONS...] {COMMAND} ...\n\n"
-               "Install init system units.\n\n"
-               "  -h --help           Show this help\n"
-               "     --force          Override existing links\n"
-               "     --verbose        Show what is being done as it is done\n"
-               "     --system         Install into system\n"
-               "     --session        Install into session\n"
-               "     --global         Install into all sessions\n"
-               "     --all            When disabling, remove all symlinks, not\n"
-               "                      just those listed in the [Install] section\n"
-               "     --realize[=MODE] Start/stop/restart unit after installation\n"
-               "                      Takes 'no', 'minimal', 'maybe' or 'yes'\n\n"
-               "Commands:\n"
-               "  enable [NAME...]    Enable one or more units\n"
-               "  disable [NAME...]   Disable one or more units\n"
-               "  realize [NAME...]   Test whether any of the specified units are enabled\n"
-               "                      and the start/stop/restart units accordingly\n"
-               "  test [NAME...]      Test whether any of the specified units are enabled\n",
-               program_invocation_short_name);
-
-        return 0;
-}
-
-static int parse_argv(int argc, char *argv[]) {
-
-        enum {
-                ARG_SESSION = 0x100,
-                ARG_SYSTEM,
-                ARG_GLOBAL,
-                ARG_FORCE,
-                ARG_REALIZE,
-                ARG_ALL
-        };
-
-        static const struct option options[] = {
-                { "help",      no_argument,       NULL, 'h'         },
-                { "session",   no_argument,       NULL, ARG_SESSION },
-                { "system",    no_argument,       NULL, ARG_SYSTEM  },
-                { "global",    no_argument,       NULL, ARG_GLOBAL  },
-                { "force",     no_argument,       NULL, ARG_FORCE   },
-                { "realize",   optional_argument, NULL, ARG_REALIZE },
-                { "all",       no_argument,       NULL, ARG_ALL     },
-                { "verbose",   no_argument,       NULL, 'v'         },
-                { NULL,        0,                 NULL, 0           }
-        };
-
-        int c;
-        bool realize_switch = false;
-
-        assert(argc >= 1);
-        assert(argv);
-
-        while ((c = getopt_long(argc, argv, "hv", options, NULL)) >= 0) {
-
-                switch (c) {
-
-                case 'h':
-                        help();
-                        return 0;
-
-                case ARG_SESSION:
-                        arg_where = WHERE_SESSION;
-                        break;
-
-                case ARG_SYSTEM:
-                        arg_where = WHERE_SYSTEM;
-                        break;
-
-                case ARG_GLOBAL:
-                        arg_where = WHERE_GLOBAL;
-                        break;
-
-                case ARG_FORCE:
-                        arg_force = true;
-                        break;
-
-                case ARG_REALIZE:
-
-                        realize_switch = true;
-
-                        if (!optarg)
-                                arg_realize = REALIZE_MINIMAL;
-                        else if (streq(optarg, "no"))
-                                arg_realize = REALIZE_NO;
-                        else if (streq(optarg, "minimal"))
-                                arg_realize = REALIZE_MINIMAL;
-                        else if (streq(optarg, "maybe"))
-                                arg_realize = REALIZE_MAYBE;
-                        else if (streq(optarg, "yes"))
-                                arg_realize = REALIZE_YES;
-                        else if (streq(optarg, "reload"))
-                                arg_realize = REALIZE_RELOAD;
-                        else {
-                                log_error("Invalid --realize argument %s", optarg);
-                                return -EINVAL;
-                        }
-
-                        break;
-
-                case ARG_ALL:
-                        arg_all = true;
-                        break;
-
-                case 'v':
-                        arg_verbose = true;
-                        break;
-
-                case '?':
-                        return -EINVAL;
-
-                default:
-                        log_error("Unknown option code %c", c);
-                        return -EINVAL;
-                }
-        }
-
-        if (optind >= argc) {
-                help();
-                return -EINVAL;
-        }
-
-        if (streq(argv[optind], "enable"))
-                arg_action = ACTION_ENABLE;
-        else if (streq(argv[optind], "disable"))
-                arg_action = ACTION_DISABLE;
-        else if (streq(argv[optind], "test"))
-                arg_action = ACTION_TEST;
-        else if (streq(argv[optind], "realize")) {
-                arg_action = ACTION_REALIZE;
-
-                if (!realize_switch)
-                        arg_realize = REALIZE_MINIMAL;
-        } else {
-                log_error("Unknown verb %s.", argv[optind]);
-                return -EINVAL;
-        }
-
-        optind++;
-
-        if (optind >= argc) {
-                log_error("Missing unit name.");
-                return -EINVAL;
-        }
-
-
-        return 1;
-}
-
-static void install_info_free(InstallInfo *i) {
-        assert(i);
-
-        free(i->name);
-        free(i->path);
-        strv_free(i->aliases);
-        strv_free(i->wanted_by);
-        free(i);
-}
-
-static void install_info_hashmap_free(Hashmap *m) {
-        InstallInfo *i;
-
-        while ((i = hashmap_steal_first(m)))
-                install_info_free(i);
-
-        hashmap_free(m);
-}
-
-static bool unit_name_valid(const char *name) {
-
-        /* This is a minimal version of unit_name_valid() from
-         * unit-name.c */
-
-        if (!*name)
-                return false;
-
-        if (ignore_file(name))
-                return false;
-
-        return true;
-}
-
-static int install_info_add(const char *name) {
-        InstallInfo *i;
-        int r;
-
-        if (!unit_name_valid(name))
-                return -EINVAL;
-
-        if (hashmap_get(have_installed, name) ||
-            hashmap_get(will_install, name))
-                return 0;
-
-        if (!(i = new0(InstallInfo, 1))) {
-                r = -ENOMEM;
-                goto fail;
-        }
-
-        if (!(i->name = strdup(name))) {
-                r = -ENOMEM;
-                goto fail;
-        }
-
-        if ((r = hashmap_put(will_install, i->name, i)) < 0)
-                goto fail;
-
-        return 0;
-
-fail:
-        if (i)
-                install_info_free(i);
-
-        return r;
-}
-
-static int daemon_reload(DBusConnection *bus) {
-        DBusMessage *m = NULL, *reply = NULL;
-        DBusError error;
-        int r;
-
-        assert(bus);
-
-        dbus_error_init(&error);
-
-        if (arg_verbose)
-                log_info("Reloading daemon configuration.");
-
-        if (!(m = dbus_message_new_method_call(
-                              "org.freedesktop.systemd1",
-                              "/org/freedesktop/systemd1",
-                              "org.freedesktop.systemd1.Manager",
-                              "Reload"))) {
-                log_error("Could not allocate message.");
-                return -ENOMEM;
-        }
-
-        if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
-                log_error("Failed to reload configuration: %s", error.message);
-                r = -EIO;
-                goto finish;
-        }
-
-        r = 0;
-
-finish:
-        if (m)
-                dbus_message_unref(m);
-
-        if (reply)
-                dbus_message_unref(reply);
-
-        dbus_error_free(&error);
-
-        return r;
-}
-
-static int install_info_run(DBusConnection *bus, InstallInfo *i, bool enabled) {
-        DBusMessage *m = NULL, *reply = NULL;
-        DBusError error;
-        int r;
-        const char *mode = "replace";
-
-        assert(bus);
-        assert(i);
-
-        dbus_error_init(&error);
-
-        if (arg_action == ACTION_ENABLE ||
-            (arg_action == ACTION_REALIZE && enabled)) {
-
-                if (arg_realize == REALIZE_MAYBE) {
-                        char **k;
-                        bool yes_please = false;
-
-                        STRV_FOREACH(k, i->wanted_by) {
-                                DBusMessageIter sub, iter;
-
-                                const char *path, *state;
-                                const char *interface = "org.freedesktop.systemd1.Unit";
-                                const char *property = "ActiveState";
-
-                                if (!(m = dbus_message_new_method_call(
-                                                      "org.freedesktop.systemd1",
-                                                      "/org/freedesktop/systemd1",
-                                                      "org.freedesktop.systemd1.Manager",
-                                                      "GetUnit"))) {
-                                        log_error("Could not allocate message.");
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
-
-                                if (!dbus_message_append_args(m,
-                                                              DBUS_TYPE_STRING, k,
-                                                              DBUS_TYPE_INVALID)) {
-                                        log_error("Could not append arguments to message.");
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
-
-                                if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
-                                        /* Hmm, this unit doesn't exist, let's try the next one */
-                                        dbus_message_unref(m);
-                                        m = NULL;
-                                        continue;
-                                }
-
-                                if (!dbus_message_get_args(reply, &error,
-                                                           DBUS_TYPE_OBJECT_PATH, &path,
-                                                           DBUS_TYPE_INVALID)) {
-                                        log_error("Failed to parse reply: %s", error.message);
-                                        r = -EIO;
-                                        goto finish;
-                                }
-
-                                dbus_message_unref(m);
-                                if (!(m = dbus_message_new_method_call(
-                                                      "org.freedesktop.systemd1",
-                                                      path,
-                                                      "org.freedesktop.DBus.Properties",
-                                                      "Get"))) {
-                                        log_error("Could not allocate message.");
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
-
-                                if (!dbus_message_append_args(m,
-                                                              DBUS_TYPE_STRING, &interface,
-                                                              DBUS_TYPE_STRING, &property,
-                                                              DBUS_TYPE_INVALID)) {
-                                        log_error("Could not append arguments to message.");
-                                        r = -ENOMEM;
-                                        goto finish;
-                                }
-
-                                dbus_message_unref(reply);
-                                if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
-                                        log_error("Failed to issue method call: %s", error.message);
-                                        r = -EIO;
-                                        goto finish;
-                                }
-
-                                if (!dbus_message_iter_init(reply, &iter) ||
-                                    dbus_message_iter_get_arg_type(&iter) != DBUS_TYPE_VARIANT)  {
-                                        log_error("Failed to parse reply.");
-                                        r = -EIO;
-                                        goto finish;
-                                }
-
-                                dbus_message_iter_recurse(&iter, &sub);
-
-                                if (dbus_message_iter_get_arg_type(&sub) != DBUS_TYPE_STRING)  {
-                                        log_error("Failed to parse reply.");
-                                        r = -EIO;
-                                        goto finish;
-                                }
-
-                                dbus_message_iter_get_basic(&sub, &state);
-
-                                dbus_message_unref(m);
-                                dbus_message_unref(reply);
-                                m = reply = NULL;
-
-                                if (streq(state, "active") ||
-                                    startswith(state, "reloading") ||
-                                    startswith(state, "activating")) {
-                                        yes_please = true;
-                                        break;
-                                }
-                        }
-
-                        if (!yes_please) {
-                                r = 0;
-                                goto finish;
-                        }
-                }
-
-                if (arg_verbose)
-                        log_info("Restarting %s.", i->name);
-
-                if (!(m = dbus_message_new_method_call(
-                                      "org.freedesktop.systemd1",
-                                      "/org/freedesktop/systemd1",
-                                      "org.freedesktop.systemd1.Manager",
-                                      arg_realize == REALIZE_MINIMAL ? "TryRestartUnit" : "RestartUnit"))) {
-                        log_error("Could not allocate message.");
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                if (!dbus_message_append_args(m,
-                                              DBUS_TYPE_STRING, &i->name,
-                                              DBUS_TYPE_STRING, &mode,
-                                              DBUS_TYPE_INVALID)) {
-                        log_error("Could not append arguments to message.");
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-
-        } else if (arg_action == ACTION_DISABLE ||
-                   (arg_action == ACTION_REALIZE && !enabled)) {
-
-                if (arg_verbose)
-                        log_info("Stopping %s.", i->name);
-
-                if (!(m = dbus_message_new_method_call(
-                                      "org.freedesktop.systemd1",
-                                      "/org/freedesktop/systemd1",
-                                      "org.freedesktop.systemd1.Manager",
-                                      "StopUnit"))) {
-                        log_error("Could not allocate message.");
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                if (!dbus_message_append_args(m,
-                                              DBUS_TYPE_STRING, &i->name,
-                                              DBUS_TYPE_STRING, &mode,
-                                              DBUS_TYPE_INVALID)) {
-                        log_error("Could not append arguments to message.");
-                        r = -ENOMEM;
-                        goto finish;
-                }
-        } else
-                assert_not_reached("install_info_run() called but nothing to do?");
-
-        if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
-                log_error("Failed to realize unit: %s", error.message);
-                r = -EIO;
-                goto finish;
-        }
-
-        r = 0;
-
-finish:
-        if (m)
-                dbus_message_unref(m);
-
-        if (reply)
-                dbus_message_unref(reply);
-
-        dbus_error_free(&error);
-
-        return r;
-}
-
-static int config_parse_also(
-                const char *filename,
-                unsigned line,
-                const char *section,
-                const char *lvalue,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        char *w;
-        size_t l;
-        char *state;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-
-        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
-                char *n;
-                int r;
-
-                if (!(n = strndup(w, l)))
-                        return -ENOMEM;
-
-                r = install_info_add(n);
-                free(n);
-
-                if (r < 0)
-                        return r;
-        }
-
-        return 0;
-}
-
-static int mark_symlink_for_removal(const char *p) {
-        char *n;
-        int r;
-
-        assert(p);
-        assert(path_is_absolute(p));
-
-        if (!remove_symlinks_to)
-                return 0;
-
-        if (!(n = canonicalize_file_name(p)))
-                if (!(n = strdup(p)))
-                        return -ENOMEM;
-
-        path_kill_slashes(n);
-
-        if ((r = set_put(remove_symlinks_to, n)) < 0) {
-                free(n);
-                return r;
-        }
-
-        return 0;
-}
-
-static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) {
-        int r = 0;
-        DIR *d;
-        struct dirent *de;
-
-        assert(fd >= 0);
-        assert(root);
-        assert(deleted);
-
-        if (!(d = fdopendir(fd)))
-                return -errno;
-
-        rewinddir(d);
-
-        while ((de = readdir(d))) {
-                bool is_dir = false, is_link = false;
-
-                if (ignore_file(de->d_name))
-                        continue;
-
-                if (de->d_type == DT_LNK)
-                        is_link = true;
-                else if (de->d_type == DT_DIR)
-                        is_dir = true;
-                else if (de->d_type == DT_UNKNOWN) {
-                        struct stat st;
-
-                        if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
-                                log_error("Failed to stat %s/%s: %m", root, de->d_name);
-
-                                if (r == 0)
-                                        r = -errno;
-                                continue;
-                        }
-
-                        is_link = S_ISLNK(st.st_mode);
-                        is_dir = S_ISDIR(st.st_mode);
-                } else
-                        continue;
-
-                if (is_dir) {
-                        int nfd, q;
-                        char *p;
-
-                        if ((nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) {
-                                log_error("Failed to open %s/%s: %m", root, de->d_name);
-
-                                if (r == 0)
-                                        r = -errno;
-                                continue;
-                        }
-
-                        if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
-                                log_error("Failed to allocate directory string.");
-                                close_nointr_nofail(nfd);
-                                r = -ENOMEM;
-                                break;
-                        }
-
-                        q = remove_marked_symlinks_fd(nfd, config_path, p, deleted);
-                        free(p);
-                        close_nointr_nofail(nfd);
-
-                        if (r == 0)
-                                q = r;
-
-                } else if (is_link) {
-                        char *p, *dest, *c;
-                        int q;
-
-                        if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
-                                log_error("Failed to allocate symlink string.");
-                                r = -ENOMEM;
-                                break;
-                        }
-
-                        if ((q = readlink_and_make_absolute(p, &dest)) < 0) {
-                                log_error("Cannot read symlink %s: %s", p, strerror(-q));
-                                free(p);
-
-                                if (r == 0)
-                                        r = q;
-                                continue;
-                        }
-
-                        if ((c = canonicalize_file_name(dest))) {
-                                /* This might fail if the destination
-                                 * is already removed */
-
-                                free(dest);
-                                dest = c;
-                        }
-
-                        path_kill_slashes(dest);
-                        if (set_get(remove_symlinks_to, dest)) {
-
-                                if (arg_verbose)
-                                        log_info("rm '%s'", p);
-
-                                if (unlink(p) < 0) {
-                                        log_error("Cannot unlink symlink %s: %m", p);
-
-                                        if (r == 0)
-                                                r = -errno;
-                                } else {
-                                        rmdir_parents(p, config_path);
-                                        path_kill_slashes(p);
-
-                                        if (!set_get(remove_symlinks_to, p)) {
-
-                                                if ((r = mark_symlink_for_removal(p)) < 0) {
-                                                        if (r == 0)
-                                                                r = q;
-                                                } else
-                                                        *deleted = true;
-                                        }
-                                }
-                        }
-
-                        free(p);
-                        free(dest);
-                }
-        }
-
-        return r;
-}
-
-static int remove_marked_symlinks(const char *config_path) {
-        int fd, r = 0;
-        bool deleted;
-
-        assert(config_path);
-
-        if (set_size(remove_symlinks_to) <= 0)
-                return 0;
-
-        if ((fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0)
-                return -errno;
-
-        do {
-                int q;
-                deleted = false;
-
-                if ((q = remove_marked_symlinks_fd(fd, config_path, config_path, &deleted)) < 0) {
-                        if (r == 0)
-                                r = q;
-                }
-        } while (deleted);
-
-        close_nointr_nofail(fd);
-
-        return r;
-}
-
-static int create_symlink(const char *old_path, const char *new_path) {
-        int r;
-
-        assert(old_path);
-        assert(new_path);
-
-        if (arg_action == ACTION_ENABLE) {
-                char *dest;
-
-                mkdir_parents(new_path, 0755);
-
-                if (symlink(old_path, new_path) >= 0)
-                        return 0;
-
-                if (errno != EEXIST) {
-                        log_error("Cannot link %s to %s: %m", old_path, new_path);
-                        return -errno;
-                }
-
-                if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
-
-                        if (errno == EINVAL) {
-                                log_error("Cannot link %s to %s, file exists already and is not a symlink.", old_path, new_path);
-                                return -EEXIST;
-                        }
-
-                        log_error("readlink() failed: %s", strerror(-r));
-                        return r;
-                }
-
-                if (streq(dest, old_path)) {
-                        free(dest);
-                        return 0;
-                }
-
-                if (!arg_force) {
-                        log_error("Cannot link %s to %s, symlink exists already and points to %s.", old_path, new_path, dest);
-                        free(dest);
-                        return -EEXIST;
-                }
-
-                free(dest);
-                unlink(new_path);
-
-                if (arg_verbose)
-                        log_info("ln -s '%s' '%s'", old_path, new_path);
-
-                if (symlink(old_path, new_path) >= 0)
-                        return 0;
-
-                log_error("Cannot link %s to %s: %m", old_path, new_path);
-                return -errno;
-
-        } else if (arg_action == ACTION_DISABLE) {
-                char *dest;
-
-                if ((r = mark_symlink_for_removal(old_path)) < 0)
-                        return r;
-
-                if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
-                        if (errno == ENOENT)
-                                return 0;
-
-                        if (errno == EINVAL) {
-                                log_warning("File %s not a symlink, ignoring.", old_path);
-                                return 0;
-                        }
-
-                        log_error("readlink() failed: %s", strerror(-r));
-                        return r;
-                }
-
-                if (!streq(dest, old_path)) {
-                        log_warning("File %s not a symlink to %s but points to %s, ignoring.", new_path, old_path, dest);
-                        free(dest);
-                        return 0;
-                }
-
-
-                free(dest);
-
-                if ((r = mark_symlink_for_removal(new_path)) < 0)
-                        return r;
-
-                if (arg_verbose)
-                        log_info("rm '%s'", new_path);
-
-                if (unlink(new_path) >= 0)
-                        return 0;
-
-                log_error("Cannot unlink %s: %m", new_path);
-                return -errno;
-
-        } else if (arg_action == ACTION_TEST || arg_action == ACTION_REALIZE) {
-                char *dest;
-
-                if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
-
-                        if (errno == ENOENT || errno == EINVAL)
-                                return 0;
-
-                        log_error("readlink() failed: %s", strerror(-r));
-                        return r;
-                }
-
-                if (streq(dest, old_path)) {
-                        free(dest);
-                        return 1;
-                }
-
-                return 0;
-        }
-
-        assert_not_reached("Unknown action.");
-}
-
-static int install_info_symlink_alias(InstallInfo *i, const char *config_path) {
-        char **s;
-        char *alias_path = NULL;
-        int r;
-
-        assert(i);
-
-        STRV_FOREACH(s, i->aliases) {
-
-                if (!unit_name_valid(*s)) {
-                        log_error("Invalid name %s.", *s);
-                        r = -EINVAL;
-                        goto finish;
-                }
-
-                free(alias_path);
-                if (!(alias_path = path_make_absolute(*s, config_path))) {
-                        log_error("Out of memory");
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                if ((r = create_symlink(i->path, alias_path)) != 0)
-                        goto finish;
-
-                if (arg_action == ACTION_DISABLE)
-                        rmdir_parents(alias_path, config_path);
-        }
-
-        r = 0;
-
-finish:
-        free(alias_path);
-
-        return r;
-}
-
-static int install_info_symlink_wants(InstallInfo *i, const char *config_path) {
-        char **s;
-        char *alias_path = NULL;
-        int r;
-
-        assert(i);
-
-        STRV_FOREACH(s, i->wanted_by) {
-                if (!unit_name_valid(*s)) {
-                        log_error("Invalid name %s.", *s);
-                        r = -EINVAL;
-                        goto finish;
-                }
-
-                free(alias_path);
-                alias_path = NULL;
-
-                if (asprintf(&alias_path, "%s/%s.wants/%s", config_path, *s, i->name) < 0) {
-                        log_error("Out of memory");
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                if ((r = create_symlink(i->path, alias_path)) != 0)
-                        goto finish;
-
-                if (arg_action == ACTION_DISABLE)
-                        rmdir_parents(alias_path, config_path);
-        }
-
-        r = 0;
-
-finish:
-        free(alias_path);
-
-        return r;
-}
-
-static int install_info_apply(LookupPaths *paths, InstallInfo *i, const char *config_path) {
-
-        const ConfigItem items[] = {
-                { "Alias",    config_parse_strv, &i->aliases,   "Install" },
-                { "WantedBy", config_parse_strv, &i->wanted_by, "Install" },
-                { "Also",     config_parse_also, NULL,          "Install" },
-
-                { NULL, NULL, NULL, NULL }
-        };
-
-        char **p;
-        char *filename = NULL;
-        FILE *f = NULL;
-        int r;
-
-        assert(paths);
-        assert(i);
-
-        STRV_FOREACH(p, paths->unit_path) {
-                int fd;
-
-                if (!(filename = path_make_absolute(i->name, *p))) {
-                        log_error("Out of memory");
-                        return -ENOMEM;
-                }
-
-                /* Ensure that we don't follow symlinks */
-                if ((fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NOCTTY)) >= 0)
-                        if ((f = fdopen(fd, "re")))
-                                break;
-
-                if (errno == ELOOP) {
-                        log_error("Refusing to operate on symlinks, please pass unit names or absolute paths to unit files.");
-                        free(filename);
-                        return -errno;
-                }
-
-                if (errno != ENOENT) {
-                        log_error("Failed to open %s: %m", filename);
-                        free(filename);
-                        return -errno;
-                }
-
-                free(filename);
-                filename = NULL;
-        }
-
-        if (!f) {
-                log_error("Couldn't find %s.", i->name);
-                return -ENOENT;
-        }
-
-        i->path = filename;
-
-        if ((r = config_parse(filename, f, NULL, items, true, i)) < 0) {
-                fclose(f);
-                return r;
-        }
-
-        fclose(f);
-
-        if ((r = install_info_symlink_alias(i, config_path)) != 0)
-                return r;
-
-        if ((r = install_info_symlink_wants(i, config_path)) != 0)
-                return r;
-
-        if ((r = mark_symlink_for_removal(filename)) < 0)
-                return r;
-
-        if ((r = remove_marked_symlinks(config_path)) < 0)
-                return r;
-
-        return 0;
-}
-
-static char *get_config_path(void) {
-
-        switch (arg_where) {
-
-        case WHERE_SYSTEM:
-                return strdup(SYSTEM_CONFIG_UNIT_PATH);
-
-        case WHERE_GLOBAL:
-                return strdup(SESSION_CONFIG_UNIT_PATH);
-
-        case WHERE_SESSION: {
-                char *p;
-
-                if (session_config_home(&p) < 0)
-                        return NULL;
-
-                return p;
-        }
-
-        default:
-                assert_not_reached("Unknown config path.");
-        }
-}
-
-static int do_realize(bool enabled) {
-        DBusConnection *bus = NULL;
-        DBusError error;
-        int r, q;
-        Iterator i;
-        InstallInfo *j;
-
-        dbus_error_init(&error);
-
-        if (arg_realize == REALIZE_NO)
-                return 0;
-
-        if (arg_where == WHERE_GLOBAL) {
-                log_warning("Warning: --realize has no effect with --global.");
-                return 0;
-        }
-
-        if (arg_action == ACTION_TEST) {
-                log_warning("Warning: --realize has no effect with test.");
-                return 0;
-        }
-
-        if (arg_where == WHERE_SYSTEM && sd_booted() <= 0) {
-                log_info("systemd is not running, --realize has no effect.");
-                return 0;
-        }
-
-        if (arg_where == WHERE_SYSTEM && running_in_chroot() > 0) {
-                log_info("Running in a chroot() environment, --realize has no effect.");
-                return 0;
-        }
-
-        if ((r = bus_connect(arg_where == WHERE_SESSION ? DBUS_BUS_SESSION : DBUS_BUS_SYSTEM, &bus, NULL, &error)) < 0) {
-                log_error("Failed to get D-Bus connection: %s", error.message);
-                goto finish;
-        }
-
-        r = 0;
-
-        if (arg_action == ACTION_ENABLE || arg_action == ACTION_REALIZE)
-                if ((r = daemon_reload(bus)) < 0)
-                        goto finish;
-
-        if (arg_realize != REALIZE_RELOAD) {
-                HASHMAP_FOREACH(j, have_installed, i)
-                        if ((q = install_info_run(bus, j, enabled)) < 0)
-                                r = q;
-        }
-
-        if (arg_action == ACTION_DISABLE)
-                if ((q = daemon_reload(bus)) < 0)
-                        r = q;
-
-finish:
-        if (bus) {
-                dbus_connection_close(bus);
-                dbus_connection_unref(bus);
-        }
-
-        dbus_error_free(&error);
-
-        dbus_shutdown();
-        return r;
-}
-
-int main(int argc, char *argv[]) {
-        int r, retval = 1, j;
-        LookupPaths paths;
-        InstallInfo *i;
-        char *config_path = NULL;
-
-        zero(paths);
-
-        log_parse_environment();
-
-        if ((r = parse_argv(argc, argv)) < 0)
-                goto finish;
-        else if (r == 0) {
-                retval = 0;
-                goto finish;
-        }
-
-        if ((r = lookup_paths_init(&paths, arg_where == WHERE_SYSTEM ? MANAGER_SYSTEM : MANAGER_SESSION)) < 0) {
-                log_error("Failed to determine lookup paths: %s", strerror(-r));
-                goto finish;
-        }
-
-        if (!(config_path = get_config_path())) {
-                log_error("Failed to determine config path");
-                goto finish;
-        }
-
-        will_install = hashmap_new(string_hash_func, string_compare_func);
-        have_installed = hashmap_new(string_hash_func, string_compare_func);
-
-        if (!will_install || !have_installed) {
-                log_error("Failed to allocate unit sets.");
-                goto finish;
-        }
-
-        if (arg_all)
-                if (!(remove_symlinks_to = set_new(string_hash_func, string_compare_func))) {
-                        log_error("Failed to allocate symlink sets.");
-                        goto finish;
-                }
-
-        for (j = optind; j < argc; j++)
-                if ((r = install_info_add(argv[j])) < 0)
-                        goto finish;
-
-
-        while ((i = hashmap_first(will_install))) {
-                assert_se(hashmap_move_one(have_installed, will_install, i->name) == 0);
-
-                if ((r = install_info_apply(&paths, i, config_path)) != 0) {
-
-                        if (r < 0)
-                                goto finish;
-
-                        /* In test mode and found something */
-                        retval = 0;
-                        break;
-                }
-        }
-
-        if (do_realize(!retval) < 0)
-                goto finish;
-
-finish:
-        install_info_hashmap_free(will_install);
-        install_info_hashmap_free(have_installed);
-
-        set_free_free(remove_symlinks_to);
-
-        lookup_paths_free(&paths);
-
-        free(config_path);
-
-        return retval;
-}
diff --git a/src/systemctl.c b/src/systemctl.c
index 667aeaeb96..1e3385f860 100644
--- a/src/systemctl.c
+++ b/src/systemctl.c
@@ -30,6 +30,7 @@
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/socket.h>
+#include <sys/stat.h>
 
 #include <dbus/dbus.h>
 
@@ -45,20 +46,27 @@
 #include "cgroup-show.h"
 #include "cgroup-util.h"
 #include "list.h"
+#include "path-lookup.h"
+#include "conf-parser.h"
+#include "sd-daemon.h"
 
 static const char *arg_type = NULL;
 static char **arg_property = NULL;
 static bool arg_all = false;
 static bool arg_fail = false;
 static bool arg_session = false;
-static bool arg_no_block = false;
+static bool arg_global = false;
 static bool arg_immediate = false;
+static bool arg_no_block = false;
 static bool arg_no_wtmp = false;
 static bool arg_no_sync = false;
 static bool arg_no_wall = false;
+static bool arg_no_reload = false;
 static bool arg_dry = false;
 static bool arg_quiet = false;
-static char arg_full = false;
+static bool arg_full = false;
+static bool arg_force = false;
+static bool arg_defaults = false;
 static char **arg_wall = NULL;
 static enum action {
         ACTION_INVALID,
@@ -86,6 +94,8 @@ static enum dot {
 
 static bool private_bus = false;
 
+static int daemon_reload(DBusConnection *bus, char **args, unsigned n);
+
 static const char *ansi_highlight(bool b) {
         static int t = -1;
 
@@ -687,6 +697,9 @@ static int cancel_job(DBusConnection *bus, char **args, unsigned n) {
         assert(bus);
         assert(args);
 
+        if (n <= 1)
+                return daemon_reload(bus, args, n);
+
         for (i = 1; i < n; i++) {
                 unsigned id;
                 const char *path;
@@ -766,7 +779,7 @@ finish:
         return r;
 }
 
-static bool unit_need_daemon_reload(DBusConnection *bus, const char *unit) {
+static bool need_daemon_reload(DBusConnection *bus, const char *unit) {
         DBusMessage *m, *reply;
         dbus_bool_t b = FALSE;
         DBusMessageIter iter, sub;
@@ -1007,7 +1020,7 @@ static int start_unit_one(
                 goto finish;
         }
 
-        if (unit_need_daemon_reload(bus, name))
+        if (need_daemon_reload(bus, name))
                 log_warning("Unit file of created job changed on disk, 'systemctl %s daemon-reload' recommended.",
                             arg_session ? "--session" : "--system");
 
@@ -2653,7 +2666,7 @@ finish:
         return r;
 }
 
-static int clear_jobs(DBusConnection *bus, char **args, unsigned n) {
+static int daemon_reload(DBusConnection *bus, char **args, unsigned n) {
         DBusMessage *m = NULL, *reply = NULL;
         DBusError error;
         int r;
@@ -2669,11 +2682,12 @@ static int clear_jobs(DBusConnection *bus, char **args, unsigned n) {
                 assert(arg_action == ACTION_SYSTEMCTL);
 
                 method =
-                        streq(args[0], "clear-jobs")        ? "ClearJobs" :
-                        streq(args[0], "daemon-reload")     ? "Reload" :
+                        streq(args[0], "clear-jobs")        ||
+                        streq(args[0], "cancel")            ? "ClearJobs" :
                         streq(args[0], "daemon-reexec")     ? "Reexecute" :
                         streq(args[0], "reset-maintenance") ? "ResetMaintenance" :
-                                                              "Exit";
+                        streq(args[0], "daemon-exit")       ? "Exit" :
+                                                              "Reload";
         }
 
         if (!(m = dbus_message_new_method_call(
@@ -2723,7 +2737,7 @@ static int reset_maintenance(DBusConnection *bus, char **args, unsigned n) {
         dbus_error_init(&error);
 
         if (n <= 1)
-                return clear_jobs(bus, args, n);
+                return daemon_reload(bus, args, n);
 
         for (i = 1; i < n; i++) {
 
@@ -2917,6 +2931,691 @@ finish:
         return r;
 }
 
+typedef struct {
+        char *name;
+        char *path;
+
+        char **aliases;
+        char **wanted_by;
+} InstallInfo;
+
+static Hashmap *will_install = NULL, *have_installed = NULL;
+static Set *remove_symlinks_to = NULL;
+
+static void install_info_free(InstallInfo *i) {
+        assert(i);
+
+        free(i->name);
+        free(i->path);
+        strv_free(i->aliases);
+        strv_free(i->wanted_by);
+        free(i);
+}
+
+static void install_info_hashmap_free(Hashmap *m) {
+        InstallInfo *i;
+
+        while ((i = hashmap_steal_first(m)))
+                install_info_free(i);
+
+        hashmap_free(m);
+}
+
+static bool unit_name_valid(const char *name) {
+
+        /* This is a minimal version of unit_name_valid() from
+         * unit-name.c */
+
+        if (!*name)
+                return false;
+
+        if (ignore_file(name))
+                return false;
+
+        return true;
+}
+
+static int install_info_add(const char *name) {
+        InstallInfo *i;
+        int r;
+
+        assert(will_install);
+
+        if (!unit_name_valid(name))
+                return -EINVAL;
+
+        if (hashmap_get(have_installed, name) ||
+            hashmap_get(will_install, name))
+                return 0;
+
+        if (!(i = new0(InstallInfo, 1))) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        if (!(i->name = strdup(name))) {
+                r = -ENOMEM;
+                goto fail;
+        }
+
+        if ((r = hashmap_put(will_install, i->name, i)) < 0)
+                goto fail;
+
+        return 0;
+
+fail:
+        if (i)
+                install_info_free(i);
+
+        return r;
+}
+
+static int config_parse_also(
+                const char *filename,
+                unsigned line,
+                const char *section,
+                const char *lvalue,
+                const char *rvalue,
+                void *data,
+                void *userdata) {
+
+        char *w;
+        size_t l;
+        char *state;
+
+        assert(filename);
+        assert(lvalue);
+        assert(rvalue);
+
+        FOREACH_WORD_QUOTED(w, l, rvalue, state) {
+                char *n;
+                int r;
+
+                if (!(n = strndup(w, l)))
+                        return -ENOMEM;
+
+                r = install_info_add(n);
+                free(n);
+
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int mark_symlink_for_removal(const char *p) {
+        char *n;
+        int r;
+
+        assert(p);
+        assert(path_is_absolute(p));
+
+        if (!remove_symlinks_to)
+                return 0;
+
+        if (!(n = strdup(p)))
+                return -ENOMEM;
+
+        path_kill_slashes(n);
+
+        if ((r = set_put(remove_symlinks_to, n)) < 0) {
+                free(n);
+                return r == -EEXIST ? 0 : r;
+        }
+
+        return 0;
+}
+
+static int remove_marked_symlinks_fd(int fd, const char *config_path, const char *root, bool *deleted) {
+        int r = 0;
+        DIR *d;
+        struct dirent *de;
+
+        assert(fd >= 0);
+        assert(root);
+        assert(deleted);
+
+        if (!(d = fdopendir(fd))) {
+                close_nointr_nofail(fd);
+                return -errno;
+        }
+
+        rewinddir(d);
+
+        while ((de = readdir(d))) {
+                bool is_dir = false, is_link = false;
+
+                if (ignore_file(de->d_name))
+                        continue;
+
+                if (de->d_type == DT_LNK)
+                        is_link = true;
+                else if (de->d_type == DT_DIR)
+                        is_dir = true;
+                else if (de->d_type == DT_UNKNOWN) {
+                        struct stat st;
+
+                        if (fstatat(fd, de->d_name, &st, AT_SYMLINK_NOFOLLOW) < 0) {
+                                log_error("Failed to stat %s/%s: %m", root, de->d_name);
+
+                                if (r == 0)
+                                        r = -errno;
+                                continue;
+                        }
+
+                        is_link = S_ISLNK(st.st_mode);
+                        is_dir = S_ISDIR(st.st_mode);
+                } else
+                        continue;
+
+                if (is_dir) {
+                        int nfd, q;
+                        char *p;
+
+                        if ((nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0) {
+                                log_error("Failed to open %s/%s: %m", root, de->d_name);
+
+                                if (r == 0)
+                                        r = -errno;
+                                continue;
+                        }
+
+                        if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
+                                log_error("Failed to allocate directory string.");
+                                close_nointr_nofail(nfd);
+                                r = -ENOMEM;
+                                break;
+                        }
+
+                        /* This will close nfd, regardless whether it succeeds or not */
+                        q = remove_marked_symlinks_fd(nfd, config_path, p, deleted);
+                        free(p);
+
+                        if (r == 0)
+                                q = r;
+
+                } else if (is_link) {
+                        char *p, *dest, *c;
+                        int q;
+
+                        if (asprintf(&p, "%s/%s", root, de->d_name) < 0) {
+                                log_error("Failed to allocate symlink string.");
+                                r = -ENOMEM;
+                                break;
+                        }
+
+                        if ((q = readlink_and_make_absolute(p, &dest)) < 0) {
+                                log_error("Cannot read symlink %s: %s", p, strerror(-q));
+                                free(p);
+
+                                if (r == 0)
+                                        r = q;
+                                continue;
+                        }
+
+                        if ((c = canonicalize_file_name(dest))) {
+                                /* This might fail if the destination
+                                 * is already removed */
+
+                                free(dest);
+                                dest = c;
+                        }
+
+                        path_kill_slashes(dest);
+                        if (set_get(remove_symlinks_to, dest)) {
+
+                                if (!arg_quiet)
+                                        log_info("rm '%s'", p);
+
+                                if (unlink(p) < 0) {
+                                        log_error("Cannot unlink symlink %s: %m", p);
+
+                                        if (r == 0)
+                                                r = -errno;
+                                } else {
+                                        rmdir_parents(p, config_path);
+                                        path_kill_slashes(p);
+
+                                        if (!set_get(remove_symlinks_to, p)) {
+
+                                                if ((r = mark_symlink_for_removal(p)) < 0) {
+                                                        if (r == 0)
+                                                                r = q;
+                                                } else
+                                                        *deleted = true;
+                                        }
+                                }
+                        }
+
+                        free(p);
+                        free(dest);
+                }
+        }
+
+        closedir(d);
+
+        return r;
+}
+
+static int remove_marked_symlinks(const char *config_path) {
+        int fd, r = 0;
+        bool deleted;
+
+        assert(config_path);
+
+        if (set_size(remove_symlinks_to) <= 0)
+                return 0;
+
+        if ((fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW)) < 0)
+                return -errno;
+
+        do {
+                int q, cfd;
+                deleted = false;
+
+                if ((cfd = dup(fd)) < 0) {
+                        r = -errno;
+                        break;
+                }
+
+                /* This takes possession of cfd and closes it */
+                if ((q = remove_marked_symlinks_fd(cfd, config_path, config_path, &deleted)) < 0) {
+                        if (r == 0)
+                                r = q;
+                }
+        } while (deleted);
+
+        close_nointr_nofail(fd);
+
+        return r;
+}
+
+static int create_symlink(const char *verb, const char *old_path, const char *new_path) {
+        int r;
+
+        assert(old_path);
+        assert(new_path);
+        assert(verb);
+
+        if (streq(verb, "enable")) {
+                char *dest;
+
+                mkdir_parents(new_path, 0755);
+
+                if (symlink(old_path, new_path) >= 0) {
+
+                        if (!arg_quiet)
+                                log_info("ln -s '%s' '%s'", old_path, new_path);
+
+                        return 0;
+                }
+
+                if (errno != EEXIST) {
+                        log_error("Cannot link %s to %s: %m", old_path, new_path);
+                        return -errno;
+                }
+
+                if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
+
+                        if (errno == EINVAL) {
+                                log_error("Cannot link %s to %s, file exists already and is not a symlink.", old_path, new_path);
+                                return -EEXIST;
+                        }
+
+                        log_error("readlink() failed: %s", strerror(-r));
+                        return r;
+                }
+
+                if (streq(dest, old_path)) {
+                        free(dest);
+                        return 0;
+                }
+
+                if (!arg_force) {
+                        log_error("Cannot link %s to %s, symlink exists already and points to %s.", old_path, new_path, dest);
+                        free(dest);
+                        return -EEXIST;
+                }
+
+                free(dest);
+                unlink(new_path);
+
+                if (!arg_quiet)
+                        log_info("ln -s '%s' '%s'", old_path, new_path);
+
+                if (symlink(old_path, new_path) >= 0)
+                        return 0;
+
+                log_error("Cannot link %s to %s: %m", old_path, new_path);
+                return -errno;
+
+        } else if (streq(verb, "disable")) {
+                char *dest;
+
+                if ((r = mark_symlink_for_removal(old_path)) < 0)
+                        return r;
+
+                if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
+                        if (errno == ENOENT)
+                                return 0;
+
+                        if (errno == EINVAL) {
+                                log_warning("File %s not a symlink, ignoring.", old_path);
+                                return 0;
+                        }
+
+                        log_error("readlink() failed: %s", strerror(-r));
+                        return r;
+                }
+
+                if (!streq(dest, old_path)) {
+                        log_warning("File %s not a symlink to %s but points to %s, ignoring.", new_path, old_path, dest);
+                        free(dest);
+                        return 0;
+                }
+
+                free(dest);
+
+                if ((r = mark_symlink_for_removal(new_path)) < 0)
+                        return r;
+
+                if (!arg_quiet)
+                        log_info("rm '%s'", new_path);
+
+                if (unlink(new_path) >= 0)
+                        return 0;
+
+                log_error("Cannot unlink %s: %m", new_path);
+                return -errno;
+
+        } else if (streq(verb, "is-enabled")) {
+                char *dest;
+
+                if ((r = readlink_and_make_absolute(new_path, &dest)) < 0) {
+
+                        if (errno == ENOENT || errno == EINVAL)
+                                return 0;
+
+                        log_error("readlink() failed: %s", strerror(-r));
+                        return r;
+                }
+
+                if (streq(dest, old_path)) {
+                        free(dest);
+                        return 1;
+                }
+
+                return 0;
+        }
+
+        assert_not_reached("Unknown action.");
+}
+
+static int install_info_symlink_alias(const char *verb, InstallInfo *i, const char *config_path) {
+        char **s;
+        char *alias_path = NULL;
+        int r;
+
+        assert(verb);
+        assert(i);
+        assert(config_path);
+
+        STRV_FOREACH(s, i->aliases) {
+
+                if (!unit_name_valid(*s)) {
+                        log_error("Invalid name %s.", *s);
+                        r = -EINVAL;
+                        goto finish;
+                }
+
+                free(alias_path);
+                if (!(alias_path = path_make_absolute(*s, config_path))) {
+                        log_error("Out of memory");
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                if ((r = create_symlink(verb, i->path, alias_path)) != 0)
+                        goto finish;
+
+                if (streq(verb, "disable"))
+                        rmdir_parents(alias_path, config_path);
+        }
+
+        r = 0;
+
+finish:
+        free(alias_path);
+
+        return r;
+}
+
+static int install_info_symlink_wants(const char *verb, InstallInfo *i, const char *config_path) {
+        char **s;
+        char *alias_path = NULL;
+        int r;
+
+        assert(verb);
+        assert(i);
+        assert(config_path);
+
+        STRV_FOREACH(s, i->wanted_by) {
+                if (!unit_name_valid(*s)) {
+                        log_error("Invalid name %s.", *s);
+                        r = -EINVAL;
+                        goto finish;
+                }
+
+                free(alias_path);
+                alias_path = NULL;
+
+                if (asprintf(&alias_path, "%s/%s.wants/%s", config_path, *s, i->name) < 0) {
+                        log_error("Out of memory");
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+                if ((r = create_symlink(verb, i->path, alias_path)) != 0)
+                        goto finish;
+
+                if (streq(verb, "disable"))
+                        rmdir_parents(alias_path, config_path);
+        }
+
+        r = 0;
+
+finish:
+        free(alias_path);
+
+        return r;
+}
+
+static int install_info_apply(const char *verb, LookupPaths *paths, InstallInfo *i, const char *config_path) {
+
+        const ConfigItem items[] = {
+                { "Alias",    config_parse_strv, &i->aliases,   "Install" },
+                { "WantedBy", config_parse_strv, &i->wanted_by, "Install" },
+                { "Also",     config_parse_also, NULL,          "Install" },
+
+                { NULL, NULL, NULL, NULL }
+        };
+
+        char **p;
+        char *filename = NULL;
+        FILE *f = NULL;
+        int r;
+
+        assert(paths);
+        assert(i);
+
+        STRV_FOREACH(p, paths->unit_path) {
+                int fd;
+
+                if (!(filename = path_make_absolute(i->name, *p))) {
+                        log_error("Out of memory");
+                        return -ENOMEM;
+                }
+
+                /* Ensure that we don't follow symlinks */
+                if ((fd = open(filename, O_RDONLY|O_CLOEXEC|O_NOFOLLOW|O_NOCTTY)) >= 0)
+                        if ((f = fdopen(fd, "re")))
+                                break;
+
+                if (errno == ELOOP) {
+                        log_error("Refusing to operate on symlinks, please pass unit names or absolute paths to unit files.");
+                        free(filename);
+                        return -errno;
+                }
+
+                if (errno != ENOENT) {
+                        log_error("Failed to open %s: %m", filename);
+                        free(filename);
+                        return -errno;
+                }
+
+                free(filename);
+                filename = NULL;
+        }
+
+        if (!f) {
+                log_error("Couldn't find %s.", i->name);
+                return -ENOENT;
+        }
+
+        i->path = filename;
+
+        if ((r = config_parse(filename, f, NULL, items, true, i)) < 0) {
+                fclose(f);
+                return r;
+        }
+
+        fclose(f);
+
+        if ((r = install_info_symlink_alias(verb, i, config_path)) != 0)
+                return r;
+
+        if ((r = install_info_symlink_wants(verb, i, config_path)) != 0)
+                return r;
+
+        if ((r = mark_symlink_for_removal(filename)) < 0)
+                return r;
+
+        if ((r = remove_marked_symlinks(config_path)) < 0)
+                return r;
+
+        return 0;
+}
+
+static char *get_config_path(void) {
+
+        if (arg_session && arg_global)
+                return strdup(SESSION_CONFIG_UNIT_PATH);
+
+        if (arg_session) {
+                char *p;
+
+                if (session_config_home(&p) < 0)
+                        return NULL;
+
+                return p;
+        }
+
+        return strdup(SYSTEM_CONFIG_UNIT_PATH);
+}
+
+static int enable_unit(DBusConnection *bus, char **args, unsigned n) {
+        DBusError error;
+        int r;
+        LookupPaths paths;
+        char *config_path = NULL;
+        unsigned j;
+        InstallInfo *i;
+        const char *verb = args[0];
+
+        dbus_error_init(&error);
+
+        zero(paths);
+        if ((r = lookup_paths_init(&paths, arg_session ? MANAGER_SESSION : MANAGER_SYSTEM)) < 0) {
+                log_error("Failed to determine lookup paths: %s", strerror(-r));
+                goto finish;
+        }
+
+        if (!(config_path = get_config_path())) {
+                log_error("Failed to determine config path");
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        will_install = hashmap_new(string_hash_func, string_compare_func);
+        have_installed = hashmap_new(string_hash_func, string_compare_func);
+
+        if (!will_install || !have_installed) {
+                log_error("Failed to allocate unit sets.");
+                r = -ENOMEM;
+                goto finish;
+        }
+
+        if (!arg_defaults && streq(verb, "disable"))
+                if (!(remove_symlinks_to = set_new(string_hash_func, string_compare_func))) {
+                        log_error("Failed to allocate symlink sets.");
+                        r = -ENOMEM;
+                        goto finish;
+                }
+
+        for (j = 1; j < n; j++)
+                if ((r = install_info_add(args[j])) < 0)
+                        goto finish;
+
+        while ((i = hashmap_first(will_install))) {
+                int q;
+
+                assert_se(hashmap_move_one(have_installed, will_install, i->name) == 0);
+
+                if ((q = install_info_apply(verb, &paths, i, config_path)) != 0) {
+
+                        if (q < 0) {
+                                if (r == 0)
+                                        r = q;
+                                goto finish;
+                        }
+
+                        /* In test mode and found something */
+                        r = 1;
+                        break;
+                }
+        }
+
+        if (streq(verb, "is-enabled"))
+                r = r > 0 ? 0 : -ENOENT;
+        else if (bus &&
+                 /* Don't try to reload anything if the user asked us to not do this */
+                 !arg_no_reload &&
+                 /* Don't try to reload anything when updating a unit globally */
+                 !arg_global &&
+                 /* Don't try to reload anything if we are called for system changes but the system wasn't booted with systemd */
+                 (arg_session || sd_booted() > 0) &&
+                 /* Don't try to reload anything if we are running in a chroot environment */
+                 (arg_session || running_in_chroot() <= 0) ) {
+                int q;
+
+                if ((q = daemon_reload(bus, args, n)) < 0)
+                        r = q;
+        }
+
+finish:
+        install_info_hashmap_free(will_install);
+        install_info_hashmap_free(have_installed);
+
+        set_free_free(remove_symlinks_to);
+
+        lookup_paths_free(&paths);
+
+        free(config_path);
+
+        return r;
+}
+
 static int systemctl_help(void) {
 
         printf("%s [OPTIONS...] {COMMAND} ...\n\n"
@@ -2925,20 +3624,25 @@ static int systemctl_help(void) {
                "  -t --type=TYPE     List only units of a particular type\n"
                "  -p --property=NAME Show only properties by this name\n"
                "  -a --all           Show all units/properties, including dead/empty ones\n"
-               "     --full          Don't ellipsize unit names.\n"
-               "     --fail          When installing a new job, fail if conflicting jobs are\n"
+               "     --full          Don't ellipsize unit names on output\n"
+               "     --fail          When queueing a new job, fail if conflicting jobs are\n"
                "                     pending\n"
+               "  -q --quiet         Suppress output\n"
+               "     --no-block      Do not wait until operation finished\n"
                "     --system        Connect to system bus\n"
                "     --session       Connect to session bus\n"
                "     --order         When generating graph for dot, show only order\n"
-               "     --require        When generating graph for dot, show only requirement\n"
-               "  -q --quiet         Suppress output\n"
-               "     --no-block      Do not wait until operation finished\n"
-               "     --no-wall       Don't send wall message before halt/power-off/reboot\n\n"
+               "     --require       When generating graph for dot, show only requirement\n"
+               "     --no-wall       Don't send wall message before halt/power-off/reboot\n"
+               "     --global        Enable/disable unit files globally\n"
+               "     --no-reload     When enabling/disabling unit files, don't reload daemon\n"
+               "                     configuration\n"
+               "     --force         When enabling unit files, override existing symlinks\n"
+               "     --defaults      When disabling unit files, remove default symlinks only\n\n"
                "Commands:\n"
                "  list-units                      List units\n"
-               "  start [NAME...]                 Start one or more units\n"
-               "  stop [NAME...]                  Stop one or more units\n"
+               "  start [NAME...]                 Start (activate) one or more units\n"
+               "  stop [NAME...]                  Stop (deactivate) one or more units\n"
                "  reload [NAME...]                Reload one or more units\n"
                "  restart [NAME...]               Start or restart one or more units\n"
                "  try-restart [NAME...]           Restart one or more units if active\n"
@@ -2947,16 +3651,18 @@ static int systemctl_help(void) {
                "  reload-or-try-restart [NAME...] Reload one or more units is possible,\n"
                "                                  otherwise restart if active\n"
                "  isolate [NAME]                  Start one unit and stop all others\n"
-               "  check [NAME...]                 Check whether units are active\n"
-               "  status [NAME...]                Show status of one or more units\n"
+               "  is-active [NAME...]             Check whether units are active\n"
+               "  status [NAME...]                Show runtime status of one or more units\n"
                "  show [NAME...|JOB...]           Show properties of one or more\n"
-               "                                  units/jobs/manager\n"
-               "  reset-maintenance [NAME...]     Reset maintenance state for all, one\n"
+               "                                  units/jobs or the manager\n"
+               "  reset-maintenance [NAME...]     Reset maintenance state for all, one,\n"
                "                                  or more units\n"
+               "  enable [NAME...]                Enable one or more unit files\n"
+               "  disable [NAME...]               Disable one or more unit files\n"
+               "  is-enabled [NAME...]            Check whether unit files are enabled\n"
                "  load [NAME...]                  Load one or more units\n"
                "  list-jobs                       List jobs\n"
-               "  cancel [JOB...]                 Cancel one or more jobs\n"
-               "  clear-jobs                      Cancel all jobs\n"
+               "  cancel [JOB...]                 Cancel all, one, or more jobs\n"
                "  monitor                         Monitor unit/job changes\n"
                "  dump                            Dump server status\n"
                "  dot                             Dump dependency graph for dot(1)\n"
@@ -3050,28 +3756,36 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
                 ARG_FAIL = 0x100,
                 ARG_SESSION,
                 ARG_SYSTEM,
+                ARG_GLOBAL,
                 ARG_NO_BLOCK,
                 ARG_NO_WALL,
                 ARG_ORDER,
                 ARG_REQUIRE,
-                ARG_FULL
+                ARG_FULL,
+                ARG_FORCE,
+                ARG_NO_RELOAD,
+                ARG_DEFAULTS
         };
 
         static const struct option options[] = {
-                { "help",      no_argument,       NULL, 'h'          },
-                { "type",      required_argument, NULL, 't'          },
-                { "property",  required_argument, NULL, 'p'          },
-                { "all",       no_argument,       NULL, 'a'          },
-                { "full",      no_argument,       NULL, ARG_FULL     },
-                { "fail",      no_argument,       NULL, ARG_FAIL     },
-                { "session",   no_argument,       NULL, ARG_SESSION  },
-                { "system",    no_argument,       NULL, ARG_SYSTEM   },
-                { "no-block",  no_argument,       NULL, ARG_NO_BLOCK },
-                { "no-wall",   no_argument,       NULL, ARG_NO_WALL  },
-                { "quiet",     no_argument,       NULL, 'q'          },
-                { "order",     no_argument,       NULL, ARG_ORDER    },
-                { "require",   no_argument,       NULL, ARG_REQUIRE  },
-                { NULL,        0,                 NULL, 0            }
+                { "help",      no_argument,       NULL, 'h'           },
+                { "type",      required_argument, NULL, 't'           },
+                { "property",  required_argument, NULL, 'p'           },
+                { "all",       no_argument,       NULL, 'a'           },
+                { "full",      no_argument,       NULL, ARG_FULL      },
+                { "fail",      no_argument,       NULL, ARG_FAIL      },
+                { "session",   no_argument,       NULL, ARG_SESSION   },
+                { "system",    no_argument,       NULL, ARG_SYSTEM    },
+                { "global",    no_argument,       NULL, ARG_GLOBAL    },
+                { "no-block",  no_argument,       NULL, ARG_NO_BLOCK  },
+                { "no-wall",   no_argument,       NULL, ARG_NO_WALL   },
+                { "quiet",     no_argument,       NULL, 'q'           },
+                { "order",     no_argument,       NULL, ARG_ORDER     },
+                { "require",   no_argument,       NULL, ARG_REQUIRE   },
+                { "force",     no_argument,       NULL, ARG_FORCE     },
+                { "no-reload", no_argument,       NULL, ARG_NO_RELOAD },
+                { "defaults",   no_argument,      NULL, ARG_DEFAULTS  },
+                { NULL,        0,                 NULL, 0             }
         };
 
         int c;
@@ -3147,6 +3861,23 @@ static int systemctl_parse_argv(int argc, char *argv[]) {
                         arg_quiet = true;
                         break;
 
+                case ARG_FORCE:
+                        arg_force = true;
+                        break;
+
+                case ARG_NO_RELOAD:
+                        arg_no_reload = true;
+                        break;
+
+                case ARG_GLOBAL:
+                        arg_global = true;
+                        arg_session = true;
+                        break;
+
+                case ARG_DEFAULTS:
+                        arg_defaults = true;
+                        break;
+
                 case '?':
                         return -EINVAL;
 
@@ -3638,7 +4369,7 @@ static int talk_initctl(void) {
         return 1;
 }
 
-static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
+static int systemctl_main(DBusConnection *bus, int argc, char *argv[], DBusError *error) {
 
         static const struct {
                 const char* verb;
@@ -3650,42 +4381,46 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
                 const int argc;
                 int (* const dispatch)(DBusConnection *bus, char **args, unsigned n);
         } verbs[] = {
-                { "list-units",        LESS,  1, list_units      },
-                { "list-jobs",         EQUAL, 1, list_jobs       },
-                { "clear-jobs",        EQUAL, 1, clear_jobs      },
-                { "load",              MORE,  2, load_unit       },
-                { "cancel",            MORE,  2, cancel_job      },
-                { "start",             MORE,  2, start_unit      },
-                { "stop",              MORE,  2, start_unit      },
-                { "reload",            MORE,  2, start_unit      },
-                { "restart",           MORE,  2, start_unit      },
-                { "try-restart",       MORE,  2, start_unit      },
-                { "reload-or-restart", MORE,  2, start_unit      },
-                { "reload-or-try-restart", MORE, 2, start_unit   },
-                { "force-reload",      MORE,  2, start_unit      }, /* For compatibility with SysV */
-                { "condrestart",       MORE,  2, start_unit      }, /* For compatibility with RH */
-                { "isolate",           EQUAL, 2, start_unit      },
-                { "check",             MORE,  2, check_unit      },
-                { "show",              MORE,  1, show            },
-                { "status",            MORE,  2, show            },
-                { "monitor",           EQUAL, 1, monitor         },
-                { "dump",              EQUAL, 1, dump            },
-                { "dot",               EQUAL, 1, dot             },
-                { "snapshot",          LESS,  2, snapshot        },
-                { "delete",            MORE,  2, delete_snapshot },
-                { "daemon-reload",     EQUAL, 1, clear_jobs      },
-                { "daemon-reexec",     EQUAL, 1, clear_jobs      },
-                { "daemon-exit",       EQUAL, 1, clear_jobs      },
-                { "show-environment",  EQUAL, 1, show_enviroment },
-                { "set-environment",   MORE,  2, set_environment },
-                { "unset-environment", MORE,  2, set_environment },
-                { "halt",              EQUAL, 1, start_special   },
-                { "poweroff",          EQUAL, 1, start_special   },
-                { "reboot",            EQUAL, 1, start_special   },
-                { "default",           EQUAL, 1, start_special   },
-                { "rescue",            EQUAL, 1, start_special   },
-                { "emergency",         EQUAL, 1, start_special   },
-                { "reset-maintenance", MORE,  1, reset_maintenance },
+                { "list-units",            LESS,  1, list_units        },
+                { "list-jobs",             EQUAL, 1, list_jobs         },
+                { "clear-jobs",            EQUAL, 1, daemon_reload     },
+                { "load",                  MORE,  2, load_unit         },
+                { "cancel",                MORE,  2, cancel_job        },
+                { "start",                 MORE,  2, start_unit        },
+                { "stop",                  MORE,  2, start_unit        },
+                { "reload",                MORE,  2, start_unit        },
+                { "restart",               MORE,  2, start_unit        },
+                { "try-restart",           MORE,  2, start_unit        },
+                { "reload-or-restart",     MORE,  2, start_unit        },
+                { "reload-or-try-restart", MORE,  2, start_unit        },
+                { "force-reload",          MORE,  2, start_unit        }, /* For compatibility with SysV */
+                { "condrestart",           MORE,  2, start_unit        }, /* For compatibility with RH */
+                { "isolate",               EQUAL, 2, start_unit        },
+                { "is-active",             MORE,  2, check_unit        },
+                { "check",                 MORE,  2, check_unit        },
+                { "show",                  MORE,  1, show              },
+                { "status",                MORE,  2, show              },
+                { "monitor",               EQUAL, 1, monitor           },
+                { "dump",                  EQUAL, 1, dump              },
+                { "dot",                   EQUAL, 1, dot               },
+                { "snapshot",              LESS,  2, snapshot          },
+                { "delete",                MORE,  2, delete_snapshot   },
+                { "daemon-reload",         EQUAL, 1, daemon_reload     },
+                { "daemon-reexec",         EQUAL, 1, daemon_reload     },
+                { "daemon-exit",           EQUAL, 1, daemon_reload     },
+                { "show-environment",      EQUAL, 1, show_enviroment   },
+                { "set-environment",       MORE,  2, set_environment   },
+                { "unset-environment",     MORE,  2, set_environment   },
+                { "halt",                  EQUAL, 1, start_special     },
+                { "poweroff",              EQUAL, 1, start_special     },
+                { "reboot",                EQUAL, 1, start_special     },
+                { "default",               EQUAL, 1, start_special     },
+                { "rescue",                EQUAL, 1, start_special     },
+                { "emergency",             EQUAL, 1, start_special     },
+                { "reset-maintenance",     MORE,  1, reset_maintenance },
+                { "enable",                MORE,  2, enable_unit       },
+                { "disable",               MORE,  2, enable_unit       },
+                { "is-enabled",            MORE,  2, enable_unit       }
         };
 
         int left;
@@ -3694,6 +4429,7 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
         assert(bus);
         assert(argc >= 0);
         assert(argv);
+        assert(error);
 
         left = argc - optind;
 
@@ -3746,6 +4482,15 @@ static int systemctl_main(DBusConnection *bus, int argc, char *argv[]) {
                 assert_not_reached("Unknown comparison operator.");
         }
 
+        /* Require a bus connection for all operations but
+         * enable/disable */
+        if (!streq(verbs[i].verb, "enable") &&
+            !streq(verbs[i].verb, "disable") &&
+            !bus) {
+                log_error("Failed to get D-Bus connection: %s", error->message);
+                return -EIO;
+        }
+
         return verbs[i].dispatch(bus, argv + optind, left);
 }
 
@@ -3754,7 +4499,7 @@ static int reload_with_fallback(DBusConnection *bus) {
 
         if (bus) {
                 /* First, try systemd via D-Bus. */
-                if ((r = clear_jobs(bus, NULL, 0)) > 0)
+                if ((r = daemon_reload(bus, NULL, 0)) > 0)
                         return 0;
         }
 
@@ -3890,13 +4635,7 @@ int main(int argc, char*argv[]) {
         switch (arg_action) {
 
         case ACTION_SYSTEMCTL: {
-
-                if (!bus) {
-                        log_error("Failed to get D-Bus connection: %s", error.message);
-                        goto finish;
-                }
-
-                retval = systemctl_main(bus, argc, argv) < 0;
+                retval = systemctl_main(bus, argc, argv, &error) < 0;
                 break;
         }