stuff

1 files changed, 0 insertions, 2474 deletions

diff --git a/src/shared/install.c b/src/shared/install.c
deleted file mode 100644
index ef8f485cae..0000000000
--- a/src/shared/install.c
+++ /dev/null
@@ -1,2474 +0,0 @@
-/***
-  This file is part of systemd.
-
-  Copyright 2011 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 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
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <fnmatch.h>
-#include <limits.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <unistd.h>
-
-#include "alloc-util.h"
-#include "conf-files.h"
-#include "conf-parser.h"
-#include "dirent-util.h"
-#include "extract-word.h"
-#include "fd-util.h"
-#include "fileio.h"
-#include "fs-util.h"
-#include "hashmap.h"
-#include "install-printf.h"
-#include "install.h"
-#include "log.h"
-#include "macro.h"
-#include "mkdir.h"
-#include "path-lookup.h"
-#include "path-util.h"
-#include "set.h"
-#include "special.h"
-#include "stat-util.h"
-#include "string-table.h"
-#include "string-util.h"
-#include "strv.h"
-#include "unit-name.h"
-
-#define UNIT_FILE_FOLLOW_SYMLINK_MAX 64
-
-typedef enum SearchFlags {
-        SEARCH_LOAD = 1,
-        SEARCH_FOLLOW_CONFIG_SYMLINKS = 2,
-} SearchFlags;
-
-typedef struct {
-        OrderedHashmap *will_process;
-        OrderedHashmap *have_processed;
-} InstallContext;
-
-static int in_search_path(const char *path, char **search) {
-        _cleanup_free_ char *parent = NULL;
-        char **i;
-
-        assert(path);
-
-        parent = dirname_malloc(path);
-        if (!parent)
-                return -ENOMEM;
-
-        STRV_FOREACH(i, search)
-                if (path_equal(parent, *i))
-                        return true;
-
-        return false;
-}
-
-static int get_config_path(UnitFileScope scope, bool runtime, const char *root_dir, char **ret) {
-        char *p = NULL;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(ret);
-
-        /* This determines where we shall create or remove our
-         * installation ("configuration") symlinks */
-
-        switch (scope) {
-
-        case UNIT_FILE_SYSTEM:
-
-                if (runtime)
-                        p = path_join(root_dir, "/run/systemd/system", NULL);
-                else
-                        p = path_join(root_dir, SYSTEM_CONFIG_UNIT_PATH, NULL);
-                break;
-
-        case UNIT_FILE_GLOBAL:
-
-                if (root_dir)
-                        return -EINVAL;
-
-                if (runtime)
-                        p = strdup("/run/systemd/user");
-                else
-                        p = strdup(USER_CONFIG_UNIT_PATH);
-                break;
-
-        case UNIT_FILE_USER:
-
-                if (root_dir)
-                        return -EINVAL;
-
-                if (runtime)
-                        r = user_runtime_dir(&p);
-                else
-                        r = user_config_home(&p);
-                if (r < 0)
-                        return r;
-                if (r == 0)
-                        return -ENOENT;
-
-                break;
-
-        default:
-                assert_not_reached("Bad scope");
-        }
-
-        if (!p)
-                return -ENOMEM;
-
-        *ret = p;
-        return 0;
-}
-
-static bool is_config_path(UnitFileScope scope, const char *path) {
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(path);
-
-        /* Checks whether the specified path is intended for
-         * configuration or is outside of it */
-
-        switch (scope) {
-
-        case UNIT_FILE_SYSTEM:
-        case UNIT_FILE_GLOBAL:
-                return path_startswith(path, "/etc") ||
-                        path_startswith(path, SYSTEM_CONFIG_UNIT_PATH) ||
-                        path_startswith(path, "/run");
-
-
-        case UNIT_FILE_USER: {
-                _cleanup_free_ char *p = NULL;
-
-                r = user_config_home(&p);
-                if (r < 0)
-                        return r;
-                if (r > 0 && path_startswith(path, p))
-                        return true;
-
-                p = mfree(p);
-
-                r = user_runtime_dir(&p);
-                if (r < 0)
-                        return r;
-                if (r > 0 && path_startswith(path, p))
-                        return true;
-
-                return false;
-        }
-
-        default:
-                assert_not_reached("Bad scope");
-        }
-}
-
-
-static int verify_root_dir(UnitFileScope scope, const char **root_dir) {
-        int r;
-
-        assert(root_dir);
-
-        /* Verifies that the specified root directory to operate on
-         * makes sense. Reset it to NULL if it is the root directory
-         * or set to empty */
-
-        if (isempty(*root_dir) || path_equal(*root_dir, "/")) {
-                *root_dir = NULL;
-                return 0;
-        }
-
-        if (scope != UNIT_FILE_SYSTEM)
-                return -EINVAL;
-
-        r = is_dir(*root_dir, true);
-        if (r < 0)
-                return r;
-        if (r == 0)
-                return -ENOTDIR;
-
-        return 0;
-}
-
-int unit_file_changes_add(
-                UnitFileChange **changes,
-                unsigned *n_changes,
-                UnitFileChangeType type,
-                const char *path,
-                const char *source) {
-
-        UnitFileChange *c;
-        unsigned i;
-
-        assert(path);
-        assert(!changes == !n_changes);
-
-        if (!changes)
-                return 0;
-
-        c = realloc(*changes, (*n_changes + 1) * sizeof(UnitFileChange));
-        if (!c)
-                return -ENOMEM;
-
-        *changes = c;
-        i = *n_changes;
-
-        c[i].type = type;
-        c[i].path = strdup(path);
-        if (!c[i].path)
-                return -ENOMEM;
-
-        path_kill_slashes(c[i].path);
-
-        if (source) {
-                c[i].source = strdup(source);
-                if (!c[i].source) {
-                        free(c[i].path);
-                        return -ENOMEM;
-                }
-
-                path_kill_slashes(c[i].path);
-        } else
-                c[i].source = NULL;
-
-        *n_changes = i+1;
-        return 0;
-}
-
-void unit_file_changes_free(UnitFileChange *changes, unsigned n_changes) {
-        unsigned i;
-
-        assert(changes || n_changes == 0);
-
-        if (!changes)
-                return;
-
-        for (i = 0; i < n_changes; i++) {
-                free(changes[i].path);
-                free(changes[i].source);
-        }
-
-        free(changes);
-}
-
-static int create_symlink(
-                const char *old_path,
-                const char *new_path,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_free_ char *dest = NULL;
-        int r;
-
-        assert(old_path);
-        assert(new_path);
-
-        /* Actually create a symlink, and remember that we did. Is
-         * smart enough to check if there's already a valid symlink in
-         * place. */
-
-        mkdir_parents_label(new_path, 0755);
-
-        if (symlink(old_path, new_path) >= 0) {
-                unit_file_changes_add(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
-                return 0;
-        }
-
-        if (errno != EEXIST)
-                return -errno;
-
-        r = readlink_malloc(new_path, &dest);
-        if (r < 0)
-                return r;
-
-        if (path_equal(dest, old_path))
-                return 0;
-
-        if (!force)
-                return -EEXIST;
-
-        r = symlink_atomic(old_path, new_path);
-        if (r < 0)
-                return r;
-
-        unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, new_path, NULL);
-        unit_file_changes_add(changes, n_changes, UNIT_FILE_SYMLINK, new_path, old_path);
-
-        return 0;
-}
-
-static int mark_symlink_for_removal(
-                Set **remove_symlinks_to,
-                const char *p) {
-
-        char *n;
-        int r;
-
-        assert(p);
-
-        r = set_ensure_allocated(remove_symlinks_to, &string_hash_ops);
-        if (r < 0)
-                return r;
-
-        n = strdup(p);
-        if (!n)
-                return -ENOMEM;
-
-        path_kill_slashes(n);
-
-        r = set_consume(*remove_symlinks_to, n);
-        if (r == -EEXIST)
-                return 0;
-        if (r < 0)
-                return r;
-
-        return 1;
-}
-
-static int remove_marked_symlinks_fd(
-                Set *remove_symlinks_to,
-                int fd,
-                const char *path,
-                const char *config_path,
-                bool *restart,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_closedir_ DIR *d = NULL;
-        struct dirent *de;
-        int r = 0;
-
-        assert(remove_symlinks_to);
-        assert(fd >= 0);
-        assert(path);
-        assert(config_path);
-        assert(restart);
-
-        d = fdopendir(fd);
-        if (!d) {
-                safe_close(fd);
-                return -errno;
-        }
-
-        rewinddir(d);
-
-        FOREACH_DIRENT(de, d, return -errno) {
-
-                dirent_ensure_type(d, de);
-
-                if (de->d_type == DT_DIR) {
-                        _cleanup_free_ char *p = NULL;
-                        int nfd, q;
-
-                        nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
-                        if (nfd < 0) {
-                                if (errno == ENOENT)
-                                        continue;
-
-                                if (r == 0)
-                                        r = -errno;
-                                continue;
-                        }
-
-                        p = path_make_absolute(de->d_name, path);
-                        if (!p) {
-                                safe_close(nfd);
-                                return -ENOMEM;
-                        }
-
-                        /* This will close nfd, regardless whether it succeeds or not */
-                        q = remove_marked_symlinks_fd(remove_symlinks_to, nfd, p, config_path, restart, changes, n_changes);
-                        if (q < 0 && r == 0)
-                                r = q;
-
-                } else if (de->d_type == DT_LNK) {
-                        _cleanup_free_ char *p = NULL, *dest = NULL;
-                        bool found;
-                        int q;
-
-                        if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY))
-                                continue;
-
-                        p = path_make_absolute(de->d_name, path);
-                        if (!p)
-                                return -ENOMEM;
-
-                        q = readlink_malloc(p, &dest);
-                        if (q < 0) {
-                                if (q == -ENOENT)
-                                        continue;
-
-                                if (r == 0)
-                                        r = q;
-                                continue;
-                        }
-
-                        /* We remove all links pointing to a file or
-                         * path that is marked, as well as all files
-                         * sharing the same name as a file that is
-                         * marked. */
-
-                        found =
-                                set_contains(remove_symlinks_to, dest) ||
-                                set_contains(remove_symlinks_to, basename(dest)) ||
-                                set_contains(remove_symlinks_to, de->d_name);
-
-                        if (!found)
-                                continue;
-
-                        if (unlink(p) < 0 && errno != ENOENT) {
-                                if (r == 0)
-                                        r = -errno;
-                                continue;
-                        }
-
-                        path_kill_slashes(p);
-                        (void) rmdir_parents(p, config_path);
-
-                        unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, p, NULL);
-
-                        q = mark_symlink_for_removal(&remove_symlinks_to, p);
-                        if (q < 0)
-                                return q;
-                        if (q > 0)
-                                *restart = true;
-                }
-        }
-
-        return r;
-}
-
-static int remove_marked_symlinks(
-                Set *remove_symlinks_to,
-                const char *config_path,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_close_ int fd = -1;
-        bool restart;
-        int r = 0;
-
-        assert(config_path);
-
-        if (set_size(remove_symlinks_to) <= 0)
-                return 0;
-
-        fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
-        if (fd < 0)
-                return -errno;
-
-        do {
-                int q, cfd;
-                restart = false;
-
-                cfd = fcntl(fd, F_DUPFD_CLOEXEC, 3);
-                if (cfd < 0)
-                        return -errno;
-
-                /* This takes possession of cfd and closes it */
-                q = remove_marked_symlinks_fd(remove_symlinks_to, cfd, config_path, config_path, &restart, changes, n_changes);
-                if (r == 0)
-                        r = q;
-        } while (restart);
-
-        return r;
-}
-
-static int find_symlinks_fd(
-                const char *root_dir,
-                const char *name,
-                int fd,
-                const char *path,
-                const char *config_path,
-                bool *same_name_link) {
-
-        _cleanup_closedir_ DIR *d = NULL;
-        struct dirent *de;
-        int r = 0;
-
-        assert(name);
-        assert(fd >= 0);
-        assert(path);
-        assert(config_path);
-        assert(same_name_link);
-
-        d = fdopendir(fd);
-        if (!d) {
-                safe_close(fd);
-                return -errno;
-        }
-
-        FOREACH_DIRENT(de, d, return -errno) {
-
-                dirent_ensure_type(d, de);
-
-                if (de->d_type == DT_DIR) {
-                        _cleanup_free_ char *p = NULL;
-                        int nfd, q;
-
-                        nfd = openat(fd, de->d_name, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
-                        if (nfd < 0) {
-                                if (errno == ENOENT)
-                                        continue;
-
-                                if (r == 0)
-                                        r = -errno;
-                                continue;
-                        }
-
-                        p = path_make_absolute(de->d_name, path);
-                        if (!p) {
-                                safe_close(nfd);
-                                return -ENOMEM;
-                        }
-
-                        /* This will close nfd, regardless whether it succeeds or not */
-                        q = find_symlinks_fd(root_dir, name, nfd, p, config_path, same_name_link);
-                        if (q > 0)
-                                return 1;
-                        if (r == 0)
-                                r = q;
-
-                } else if (de->d_type == DT_LNK) {
-                        _cleanup_free_ char *p = NULL, *dest = NULL;
-                        bool found_path, found_dest, b = false;
-                        int q;
-
-                        /* Acquire symlink name */
-                        p = path_make_absolute(de->d_name, path);
-                        if (!p)
-                                return -ENOMEM;
-
-                        /* Acquire symlink destination */
-                        q = readlink_malloc(p, &dest);
-                        if (q == -ENOENT)
-                                continue;
-                        if (q < 0) {
-                                if (r == 0)
-                                        r = q;
-                                continue;
-                        }
-
-                        /* Make absolute */
-                        if (!path_is_absolute(dest)) {
-                                char *x;
-
-                                x = prefix_root(root_dir, dest);
-                                if (!x)
-                                        return -ENOMEM;
-
-                                free(dest);
-                                dest = x;
-                        }
-
-                        /* Check if the symlink itself matches what we
-                         * are looking for */
-                        if (path_is_absolute(name))
-                                found_path = path_equal(p, name);
-                        else
-                                found_path = streq(de->d_name, name);
-
-                        /* Check if what the symlink points to
-                         * matches what we are looking for */
-                        if (path_is_absolute(name))
-                                found_dest = path_equal(dest, name);
-                        else
-                                found_dest = streq(basename(dest), name);
-
-                        if (found_path && found_dest) {
-                                _cleanup_free_ char *t = NULL;
-
-                                /* Filter out same name links in the main
-                                 * config path */
-                                t = path_make_absolute(name, config_path);
-                                if (!t)
-                                        return -ENOMEM;
-
-                                b = path_equal(t, p);
-                        }
-
-                        if (b)
-                                *same_name_link = true;
-                        else if (found_path || found_dest)
-                                return 1;
-                }
-        }
-
-        return r;
-}
-
-static int find_symlinks(
-                const char *root_dir,
-                const char *name,
-                const char *config_path,
-                bool *same_name_link) {
-
-        int fd;
-
-        assert(name);
-        assert(config_path);
-        assert(same_name_link);
-
-        fd = open(config_path, O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC|O_NOFOLLOW);
-        if (fd < 0) {
-                if (errno == ENOENT)
-                        return 0;
-                return -errno;
-        }
-
-        /* This takes possession of fd and closes it */
-        return find_symlinks_fd(root_dir, name, fd, config_path, config_path, same_name_link);
-}
-
-static int find_symlinks_in_scope(
-                UnitFileScope scope,
-                const char *root_dir,
-                const char *name,
-                UnitFileState *state) {
-
-        _cleanup_free_ char *normal_path = NULL, *runtime_path = NULL;
-        bool same_name_link_runtime = false, same_name_link = false;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(name);
-
-        /* First look in the normal config path */
-        r = get_config_path(scope, false, root_dir, &normal_path);
-        if (r < 0)
-                return r;
-
-        r = find_symlinks(root_dir, name, normal_path, &same_name_link);
-        if (r < 0)
-                return r;
-        if (r > 0) {
-                *state = UNIT_FILE_ENABLED;
-                return r;
-        }
-
-        /* Then look in runtime config path */
-        r = get_config_path(scope, true, root_dir, &runtime_path);
-        if (r < 0)
-                return r;
-
-        r = find_symlinks(root_dir, name, runtime_path, &same_name_link_runtime);
-        if (r < 0)
-                return r;
-        if (r > 0) {
-                *state = UNIT_FILE_ENABLED_RUNTIME;
-                return r;
-        }
-
-        /* Hmm, we didn't find it, but maybe we found the same name
-         * link? */
-        if (same_name_link) {
-                *state = UNIT_FILE_LINKED;
-                return 1;
-        }
-        if (same_name_link_runtime) {
-                *state = UNIT_FILE_LINKED_RUNTIME;
-                return 1;
-        }
-
-        return 0;
-}
-
-static void install_info_free(UnitFileInstallInfo *i) {
-
-        if (!i)
-                return;
-
-        free(i->name);
-        free(i->path);
-        strv_free(i->aliases);
-        strv_free(i->wanted_by);
-        strv_free(i->required_by);
-        strv_free(i->also);
-        free(i->default_instance);
-        free(i->symlink_target);
-        free(i);
-}
-
-static OrderedHashmap* install_info_hashmap_free(OrderedHashmap *m) {
-        UnitFileInstallInfo *i;
-
-        if (!m)
-                return NULL;
-
-        while ((i = ordered_hashmap_steal_first(m)))
-                install_info_free(i);
-
-        return ordered_hashmap_free(m);
-}
-
-static void install_context_done(InstallContext *c) {
-        assert(c);
-
-        c->will_process = install_info_hashmap_free(c->will_process);
-        c->have_processed = install_info_hashmap_free(c->have_processed);
-}
-
-static UnitFileInstallInfo *install_info_find(InstallContext *c, const char *name) {
-        UnitFileInstallInfo *i;
-
-        i = ordered_hashmap_get(c->have_processed, name);
-        if (i)
-                return i;
-
-        return ordered_hashmap_get(c->will_process, name);
-}
-
-static int install_info_add(
-                InstallContext *c,
-                const char *name,
-                const char *path,
-                UnitFileInstallInfo **ret) {
-
-        UnitFileInstallInfo *i = NULL;
-        int r;
-
-        assert(c);
-        assert(name || path);
-
-        if (!name)
-                name = basename(path);
-
-        if (!unit_name_is_valid(name, UNIT_NAME_ANY))
-                return -EINVAL;
-
-        i = install_info_find(c, name);
-        if (i) {
-                if (ret)
-                        *ret = i;
-                return 0;
-        }
-
-        r = ordered_hashmap_ensure_allocated(&c->will_process, &string_hash_ops);
-        if (r < 0)
-                return r;
-
-        i = new0(UnitFileInstallInfo, 1);
-        if (!i)
-                return -ENOMEM;
-        i->type = _UNIT_FILE_TYPE_INVALID;
-
-        i->name = strdup(name);
-        if (!i->name) {
-                r = -ENOMEM;
-                goto fail;
-        }
-
-        if (path) {
-                i->path = strdup(path);
-                if (!i->path) {
-                        r = -ENOMEM;
-                        goto fail;
-                }
-        }
-
-        r = ordered_hashmap_put(c->will_process, i->name, i);
-        if (r < 0)
-                goto fail;
-
-        if (ret)
-                *ret = i;
-
-        return 0;
-
-fail:
-        install_info_free(i);
-        return r;
-}
-
-static int install_info_add_auto(
-                InstallContext *c,
-                const char *name_or_path,
-                UnitFileInstallInfo **ret) {
-
-        assert(c);
-        assert(name_or_path);
-
-        if (path_is_absolute(name_or_path))
-                return install_info_add(c, NULL, name_or_path, ret);
-        else
-                return install_info_add(c, name_or_path, NULL, ret);
-}
-
-static int config_parse_also(
-                const char *unit,
-                const char *filename,
-                unsigned line,
-                const char *section,
-                unsigned section_line,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        UnitFileInstallInfo *i = userdata;
-        InstallContext *c = data;
-        int r;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-
-        for (;;) {
-                _cleanup_free_ char *word = NULL;
-
-                r = extract_first_word(&rvalue, &word, NULL, 0);
-                if (r < 0)
-                        return r;
-                if (r == 0)
-                        break;
-
-                r = install_info_add(c, word, NULL, NULL);
-                if (r < 0)
-                        return r;
-
-                r = strv_push(&i->also, word);
-                if (r < 0)
-                        return r;
-
-                word = NULL;
-        }
-
-        return 0;
-}
-
-static int config_parse_default_instance(
-                const char *unit,
-                const char *filename,
-                unsigned line,
-                const char *section,
-                unsigned section_line,
-                const char *lvalue,
-                int ltype,
-                const char *rvalue,
-                void *data,
-                void *userdata) {
-
-        UnitFileInstallInfo *i = data;
-        char *printed;
-        int r;
-
-        assert(filename);
-        assert(lvalue);
-        assert(rvalue);
-
-        r = install_full_printf(i, rvalue, &printed);
-        if (r < 0)
-                return r;
-
-        if (!unit_instance_is_valid(printed)) {
-                free(printed);
-                return -EINVAL;
-        }
-
-        free(i->default_instance);
-        i->default_instance = printed;
-
-        return 0;
-}
-
-static int unit_file_load(
-                InstallContext *c,
-                UnitFileInstallInfo *info,
-                const char *path,
-                const char *root_dir,
-                SearchFlags flags) {
-
-        const ConfigTableItem items[] = {
-                { "Install", "Alias",           config_parse_strv,             0, &info->aliases           },
-                { "Install", "WantedBy",        config_parse_strv,             0, &info->wanted_by         },
-                { "Install", "RequiredBy",      config_parse_strv,             0, &info->required_by       },
-                { "Install", "DefaultInstance", config_parse_default_instance, 0, info                     },
-                { "Install", "Also",            config_parse_also,             0, c                        },
-                {}
-        };
-
-        _cleanup_fclose_ FILE *f = NULL;
-        _cleanup_close_ int fd = -1;
-        struct stat st;
-        int r;
-
-        assert(c);
-        assert(info);
-        assert(path);
-
-        path = prefix_roota(root_dir, path);
-
-        if (!(flags & SEARCH_LOAD)) {
-                r = lstat(path, &st);
-                if (r < 0)
-                        return -errno;
-
-                if (null_or_empty(&st))
-                        info->type = UNIT_FILE_TYPE_MASKED;
-                else if (S_ISREG(st.st_mode))
-                        info->type = UNIT_FILE_TYPE_REGULAR;
-                else if (S_ISLNK(st.st_mode))
-                        return -ELOOP;
-                else if (S_ISDIR(st.st_mode))
-                        return -EISDIR;
-                else
-                        return -ENOTTY;
-
-                return 0;
-        }
-
-        fd = open(path, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW);
-        if (fd < 0)
-                return -errno;
-        if (fstat(fd, &st) < 0)
-                return -errno;
-        if (null_or_empty(&st)) {
-                info->type = UNIT_FILE_TYPE_MASKED;
-                return 0;
-        }
-        if (S_ISDIR(st.st_mode))
-                return -EISDIR;
-        if (!S_ISREG(st.st_mode))
-                return -ENOTTY;
-
-        f = fdopen(fd, "re");
-        if (!f)
-                return -errno;
-        fd = -1;
-
-        r = config_parse(NULL, path, f,
-                         NULL,
-                         config_item_table_lookup, items,
-                         true, true, false, info);
-        if (r < 0)
-                return r;
-
-        info->type = UNIT_FILE_TYPE_REGULAR;
-
-        return
-                (int) strv_length(info->aliases) +
-                (int) strv_length(info->wanted_by) +
-                (int) strv_length(info->required_by);
-}
-
-static int unit_file_load_or_readlink(
-                InstallContext *c,
-                UnitFileInstallInfo *info,
-                const char *path,
-                const char *root_dir,
-                SearchFlags flags) {
-
-        _cleanup_free_ char *np = NULL;
-        int r;
-
-        r = unit_file_load(c, info, path, root_dir, flags);
-        if (r != -ELOOP)
-                return r;
-
-        /* This is a symlink, let's read it. */
-
-        r = readlink_and_make_absolute_root(root_dir, path, &np);
-        if (r < 0)
-                return r;
-
-        if (path_equal(np, "/dev/null"))
-                info->type = UNIT_FILE_TYPE_MASKED;
-        else {
-                const char *bn;
-                UnitType a, b;
-
-                bn = basename(np);
-
-                if (unit_name_is_valid(info->name, UNIT_NAME_PLAIN)) {
-
-                        if (!unit_name_is_valid(bn, UNIT_NAME_PLAIN))
-                                return -EINVAL;
-
-                } else if (unit_name_is_valid(info->name, UNIT_NAME_INSTANCE)) {
-
-                        if (!unit_name_is_valid(bn, UNIT_NAME_INSTANCE|UNIT_NAME_TEMPLATE))
-                                return -EINVAL;
-
-                } else if (unit_name_is_valid(info->name, UNIT_NAME_TEMPLATE)) {
-
-                        if (!unit_name_is_valid(bn, UNIT_NAME_TEMPLATE))
-                                return -EINVAL;
-                } else
-                        return -EINVAL;
-
-                /* Enforce that the symlink destination does not
-                 * change the unit file type. */
-
-                a = unit_name_to_type(info->name);
-                b = unit_name_to_type(bn);
-                if (a < 0 || b < 0 || a != b)
-                        return -EINVAL;
-
-                info->type = UNIT_FILE_TYPE_SYMLINK;
-                info->symlink_target = np;
-                np = NULL;
-        }
-
-        return 0;
-}
-
-static int unit_file_search(
-                InstallContext *c,
-                UnitFileInstallInfo *info,
-                const LookupPaths *paths,
-                const char *root_dir,
-                SearchFlags flags) {
-
-        char **p;
-        int r;
-
-        assert(c);
-        assert(info);
-        assert(paths);
-
-        /* Was this unit already loaded? */
-        if (info->type != _UNIT_FILE_TYPE_INVALID)
-                return 0;
-
-        if (info->path)
-                return unit_file_load_or_readlink(c, info, info->path, root_dir, flags);
-
-        assert(info->name);
-
-        STRV_FOREACH(p, paths->unit_path) {
-                _cleanup_free_ char *path = NULL;
-
-                path = strjoin(*p, "/", info->name, NULL);
-                if (!path)
-                        return -ENOMEM;
-
-                r = unit_file_load_or_readlink(c, info, path, root_dir, flags);
-                if (r < 0) {
-                        if (r != -ENOENT)
-                                return r;
-                } else {
-                        info->path = path;
-                        path = NULL;
-                        return r;
-                }
-        }
-
-        if (unit_name_is_valid(info->name, UNIT_NAME_INSTANCE)) {
-
-                /* Unit file doesn't exist, however instance
-                 * enablement was requested.  We will check if it is
-                 * possible to load template unit file. */
-
-                _cleanup_free_ char *template = NULL;
-
-                r = unit_name_template(info->name, &template);
-                if (r < 0)
-                        return r;
-
-                STRV_FOREACH(p, paths->unit_path) {
-                        _cleanup_free_ char *path = NULL;
-
-                        path = strjoin(*p, "/", template, NULL);
-                        if (!path)
-                                return -ENOMEM;
-
-                        r = unit_file_load_or_readlink(c, info, path, root_dir, flags);
-                        if (r < 0) {
-                                if (r != -ENOENT)
-                                        return r;
-                        } else {
-                                info->path = path;
-                                path = NULL;
-                                return r;
-                        }
-                }
-        }
-
-        return -ENOENT;
-}
-
-static int install_info_follow(
-                InstallContext *c,
-                UnitFileInstallInfo *i,
-                const char *root_dir,
-                SearchFlags flags) {
-
-        assert(c);
-        assert(i);
-
-        if (i->type != UNIT_FILE_TYPE_SYMLINK)
-                return -EINVAL;
-        if (!i->symlink_target)
-                return -EINVAL;
-
-        /* If the basename doesn't match, the caller should add a
-         * complete new entry for this. */
-
-        if (!streq(basename(i->symlink_target), i->name))
-                return -EXDEV;
-
-        free(i->path);
-        i->path = i->symlink_target;
-        i->symlink_target = NULL;
-        i->type = _UNIT_FILE_TYPE_INVALID;
-
-        return unit_file_load_or_readlink(c, i, i->path, root_dir, flags);
-}
-
-static int install_info_traverse(
-                UnitFileScope scope,
-                InstallContext *c,
-                const char *root_dir,
-                const LookupPaths *paths,
-                UnitFileInstallInfo *start,
-                SearchFlags flags,
-                UnitFileInstallInfo **ret) {
-
-        UnitFileInstallInfo *i;
-        unsigned k = 0;
-        int r;
-
-        assert(paths);
-        assert(start);
-        assert(c);
-
-        r = unit_file_search(c, start, paths, root_dir, flags);
-        if (r < 0)
-                return r;
-
-        i = start;
-        while (i->type == UNIT_FILE_TYPE_SYMLINK) {
-                /* Follow the symlink */
-
-                if (++k > UNIT_FILE_FOLLOW_SYMLINK_MAX)
-                        return -ELOOP;
-
-                if (!(flags & SEARCH_FOLLOW_CONFIG_SYMLINKS) && is_config_path(scope, i->path))
-                        return -ELOOP;
-
-                r = install_info_follow(c, i, root_dir, flags);
-                if (r < 0) {
-                        _cleanup_free_ char *buffer = NULL;
-                        const char *bn;
-
-                        if (r != -EXDEV)
-                                return r;
-
-                        /* Target has a different name, create a new
-                         * install info object for that, and continue
-                         * with that. */
-
-                        bn = basename(i->symlink_target);
-
-                        if (unit_name_is_valid(i->name, UNIT_NAME_INSTANCE) &&
-                            unit_name_is_valid(bn, UNIT_NAME_TEMPLATE)) {
-
-                                _cleanup_free_ char *instance = NULL;
-
-                                r = unit_name_to_instance(i->name, &instance);
-                                if (r < 0)
-                                        return r;
-
-                                r = unit_name_replace_instance(bn, instance, &buffer);
-                                if (r < 0)
-                                        return r;
-
-                                bn = buffer;
-                        }
-
-                        r = install_info_add(c, bn, NULL, &i);
-                        if (r < 0)
-                                return r;
-
-                        r = unit_file_search(c, i, paths, root_dir, flags);
-                        if (r < 0)
-                                return r;
-                }
-
-                /* Try again, with the new target we found. */
-        }
-
-        if (ret)
-                *ret = i;
-
-        return 0;
-}
-
-static int install_info_discover(
-                UnitFileScope scope,
-                InstallContext *c,
-                const char *root_dir,
-                const LookupPaths *paths,
-                const char *name,
-                SearchFlags flags,
-                UnitFileInstallInfo **ret) {
-
-        UnitFileInstallInfo *i;
-        int r;
-
-        assert(c);
-        assert(paths);
-        assert(name);
-
-        r = install_info_add_auto(c, name, &i);
-        if (r < 0)
-                return r;
-
-        return install_info_traverse(scope, c, root_dir, paths, i, flags, ret);
-}
-
-static int install_info_symlink_alias(
-                UnitFileInstallInfo *i,
-                const char *config_path,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        char **s;
-        int r = 0, q;
-
-        assert(i);
-        assert(config_path);
-
-        STRV_FOREACH(s, i->aliases) {
-                _cleanup_free_ char *alias_path = NULL, *dst = NULL;
-
-                q = install_full_printf(i, *s, &dst);
-                if (q < 0)
-                        return q;
-
-                alias_path = path_make_absolute(dst, config_path);
-                if (!alias_path)
-                        return -ENOMEM;
-
-                q = create_symlink(i->path, alias_path, force, changes, n_changes);
-                if (r == 0)
-                        r = q;
-        }
-
-        return r;
-}
-
-static int install_info_symlink_wants(
-                UnitFileInstallInfo *i,
-                const char *config_path,
-                char **list,
-                const char *suffix,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_free_ char *buf = NULL;
-        const char *n;
-        char **s;
-        int r = 0, q;
-
-        assert(i);
-        assert(config_path);
-
-        if (unit_name_is_valid(i->name, UNIT_NAME_TEMPLATE)) {
-
-                /* Don't install any symlink if there's no default
-                 * instance configured */
-
-                if (!i->default_instance)
-                        return 0;
-
-                r = unit_name_replace_instance(i->name, i->default_instance, &buf);
-                if (r < 0)
-                        return r;
-
-                n = buf;
-        } else
-                n = i->name;
-
-        STRV_FOREACH(s, list) {
-                _cleanup_free_ char *path = NULL, *dst = NULL;
-
-                q = install_full_printf(i, *s, &dst);
-                if (q < 0)
-                        return q;
-
-                if (!unit_name_is_valid(dst, UNIT_NAME_ANY)) {
-                        r = -EINVAL;
-                        continue;
-                }
-
-                path = strjoin(config_path, "/", dst, suffix, n, NULL);
-                if (!path)
-                        return -ENOMEM;
-
-                q = create_symlink(i->path, path, force, changes, n_changes);
-                if (r == 0)
-                        r = q;
-        }
-
-        return r;
-}
-
-static int install_info_symlink_link(
-                UnitFileInstallInfo *i,
-                const LookupPaths *paths,
-                const char *config_path,
-                const char *root_dir,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_free_ char *path = NULL;
-        int r;
-
-        assert(i);
-        assert(paths);
-        assert(config_path);
-        assert(i->path);
-
-        r = in_search_path(i->path, paths->unit_path);
-        if (r != 0)
-                return r;
-
-        path = strjoin(config_path, "/", i->name, NULL);
-        if (!path)
-                return -ENOMEM;
-
-        return create_symlink(i->path, path, force, changes, n_changes);
-}
-
-static int install_info_apply(
-                UnitFileInstallInfo *i,
-                const LookupPaths *paths,
-                const char *config_path,
-                const char *root_dir,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        int r, q;
-
-        assert(i);
-        assert(paths);
-        assert(config_path);
-
-        if (i->type != UNIT_FILE_TYPE_REGULAR)
-                return 0;
-
-        r = install_info_symlink_alias(i, config_path, force, changes, n_changes);
-
-        q = install_info_symlink_wants(i, config_path, i->wanted_by, ".wants/", force, changes, n_changes);
-        if (r == 0)
-                r = q;
-
-        q = install_info_symlink_wants(i, config_path, i->required_by, ".requires/", force, changes, n_changes);
-        if (r == 0)
-                r = q;
-
-        q = install_info_symlink_link(i, paths, config_path, root_dir, force, changes, n_changes);
-        if (r == 0)
-                r = q;
-
-        return r;
-}
-
-static int install_context_apply(
-                UnitFileScope scope,
-                InstallContext *c,
-                const LookupPaths *paths,
-                const char *config_path,
-                const char *root_dir,
-                bool force,
-                SearchFlags flags,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        UnitFileInstallInfo *i;
-        int r;
-
-        assert(c);
-        assert(paths);
-        assert(config_path);
-
-        if (ordered_hashmap_isempty(c->will_process))
-                return 0;
-
-        r = ordered_hashmap_ensure_allocated(&c->have_processed, &string_hash_ops);
-        if (r < 0)
-                return r;
-
-        r = 0;
-        while ((i = ordered_hashmap_first(c->will_process))) {
-                int q;
-
-                q = ordered_hashmap_move_one(c->have_processed, c->will_process, i->name);
-                if (q < 0)
-                        return q;
-
-                r = install_info_traverse(scope, c, root_dir, paths, i, flags, NULL);
-                if (r < 0)
-                        return r;
-
-                if (i->type != UNIT_FILE_TYPE_REGULAR)
-                        continue;
-
-                q = install_info_apply(i, paths, config_path, root_dir, force, changes, n_changes);
-                if (r >= 0) {
-                        if (q < 0)
-                                r = q;
-                        else
-                                r+= q;
-                }
-        }
-
-        return r;
-}
-
-static int install_context_mark_for_removal(
-                UnitFileScope scope,
-                InstallContext *c,
-                const LookupPaths *paths,
-                Set **remove_symlinks_to,
-                const char *config_path,
-                const char *root_dir) {
-
-        UnitFileInstallInfo *i;
-        int r;
-
-        assert(c);
-        assert(paths);
-        assert(config_path);
-
-        /* Marks all items for removal */
-
-        if (ordered_hashmap_isempty(c->will_process))
-                return 0;
-
-        r = ordered_hashmap_ensure_allocated(&c->have_processed, &string_hash_ops);
-        if (r < 0)
-                return r;
-
-        while ((i = ordered_hashmap_first(c->will_process))) {
-
-                r = ordered_hashmap_move_one(c->have_processed, c->will_process, i->name);
-                if (r < 0)
-                        return r;
-
-                r = install_info_traverse(scope, c, root_dir, paths, i, SEARCH_LOAD|SEARCH_FOLLOW_CONFIG_SYMLINKS, NULL);
-                if (r < 0)
-                        return r;
-
-                if (i->type != UNIT_FILE_TYPE_REGULAR)
-                        continue;
-
-                r = mark_symlink_for_removal(remove_symlinks_to, i->name);
-                if (r < 0)
-                        return r;
-        }
-
-        return 0;
-}
-
-int unit_file_mask(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_free_ char *prefix = NULL;
-        char **i;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &prefix);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, files) {
-                _cleanup_free_ char *path = NULL;
-                int q;
-
-                if (!unit_name_is_valid(*i, UNIT_NAME_ANY)) {
-                        if (r == 0)
-                                r = -EINVAL;
-                        continue;
-                }
-
-                path = path_make_absolute(*i, prefix);
-                if (!path)
-                        return -ENOMEM;
-
-                q = create_symlink("/dev/null", path, force, changes, n_changes);
-                if (q < 0 && r >= 0)
-                        r = q;
-        }
-
-        return r;
-}
-
-int unit_file_unmask(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
-        _cleanup_free_ char *config_path = NULL;
-        _cleanup_free_ char **todo = NULL;
-        size_t n_todo = 0, n_allocated = 0;
-        char **i;
-        int r, q;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, files) {
-                _cleanup_free_ char *path = NULL;
-
-                if (!unit_name_is_valid(*i, UNIT_NAME_ANY))
-                        return -EINVAL;
-
-                path = path_make_absolute(*i, config_path);
-                if (!path)
-                        return -ENOMEM;
-
-                r = null_or_empty_path(path);
-                if (r == -ENOENT)
-                        continue;
-                if (r < 0)
-                        return r;
-                if (r == 0)
-                        continue;
-
-                if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2))
-                        return -ENOMEM;
-
-                todo[n_todo++] = *i;
-        }
-
-        strv_uniq(todo);
-
-        r = 0;
-        STRV_FOREACH(i, todo) {
-                _cleanup_free_ char *path = NULL;
-
-                path = path_make_absolute(*i, config_path);
-                if (!path)
-                        return -ENOMEM;
-
-                if (unlink(path) < 0) {
-                        if (errno != -ENOENT && r >= 0)
-                                r = -errno;
-                } else {
-                        q = mark_symlink_for_removal(&remove_symlinks_to, path);
-                        if (q < 0)
-                                return q;
-
-                        unit_file_changes_add(changes, n_changes, UNIT_FILE_UNLINK, path, NULL);
-                }
-        }
-
-        q = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
-        if (r >= 0)
-                r = q;
-
-        return r;
-}
-
-int unit_file_link(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_free_ char *config_path = NULL;
-        _cleanup_free_ char **todo = NULL;
-        size_t n_todo = 0, n_allocated = 0;
-        char **i;
-        int r, q;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, files) {
-                _cleanup_free_ char *full = NULL;
-                struct stat st;
-                char *fn;
-
-                if (!path_is_absolute(*i))
-                        return -EINVAL;
-
-                fn = basename(*i);
-                if (!unit_name_is_valid(fn, UNIT_NAME_ANY))
-                        return -EINVAL;
-
-                full = prefix_root(root_dir, *i);
-                if (!full)
-                        return -ENOMEM;
-
-                if (lstat(full, &st) < 0)
-                        return -errno;
-                if (S_ISLNK(st.st_mode))
-                        return -ELOOP;
-                if (S_ISDIR(st.st_mode))
-                        return -EISDIR;
-                if (!S_ISREG(st.st_mode))
-                        return -ENOTTY;
-
-                q = in_search_path(*i, paths.unit_path);
-                if (q < 0)
-                        return q;
-                if (q > 0)
-                        continue;
-
-                if (!GREEDY_REALLOC0(todo, n_allocated, n_todo + 2))
-                        return -ENOMEM;
-
-                todo[n_todo++] = *i;
-        }
-
-        strv_uniq(todo);
-
-        r = 0;
-        STRV_FOREACH(i, todo) {
-                _cleanup_free_ char *path = NULL;
-
-                path = path_make_absolute(basename(*i), config_path);
-                if (!path)
-                        return -ENOMEM;
-
-                q = create_symlink(*i, path, force, changes, n_changes);
-                if (q < 0 && r >= 0)
-                        r = q;
-        }
-
-        return r;
-}
-
-int unit_file_add_dependency(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                const char *target,
-                UnitDependency dep,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_(install_context_done) InstallContext c = {};
-        _cleanup_free_ char *config_path = NULL;
-        UnitFileInstallInfo *i, *target_info;
-        char **f;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(target);
-
-        if (!IN_SET(dep, UNIT_WANTS, UNIT_REQUIRES))
-                return -EINVAL;
-
-        if (!unit_name_is_valid(target, UNIT_NAME_ANY))
-                return -EINVAL;
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        r = install_info_discover(scope, &c, root_dir, &paths, target, SEARCH_FOLLOW_CONFIG_SYMLINKS, &target_info);
-        if (r < 0)
-                return r;
-        if (target_info->type == UNIT_FILE_TYPE_MASKED)
-                return -ESHUTDOWN;
-
-        assert(target_info->type == UNIT_FILE_TYPE_REGULAR);
-
-        STRV_FOREACH(f, files) {
-                char ***l;
-
-                r = install_info_discover(scope, &c, root_dir, &paths, *f, SEARCH_FOLLOW_CONFIG_SYMLINKS, &i);
-                if (r < 0)
-                        return r;
-                if (i->type == UNIT_FILE_TYPE_MASKED)
-                        return -ESHUTDOWN;
-
-                assert(i->type == UNIT_FILE_TYPE_REGULAR);
-
-                /* We didn't actually load anything from the unit
-                 * file, but instead just add in our new symlink to
-                 * create. */
-
-                if (dep == UNIT_WANTS)
-                        l = &i->wanted_by;
-                else
-                        l = &i->required_by;
-
-                strv_free(*l);
-                *l = strv_new(target_info->name, NULL);
-                if (!*l)
-                        return -ENOMEM;
-        }
-
-        return install_context_apply(scope, &c, &paths, config_path, root_dir, force, SEARCH_FOLLOW_CONFIG_SYMLINKS, changes, n_changes);
-}
-
-int unit_file_enable(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_(install_context_done) InstallContext c = {};
-        _cleanup_free_ char *config_path = NULL;
-        UnitFileInstallInfo *i;
-        char **f;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(f, files) {
-                r = install_info_discover(scope, &c, root_dir, &paths, *f, SEARCH_LOAD, &i);
-                if (r < 0)
-                        return r;
-                if (i->type == UNIT_FILE_TYPE_MASKED)
-                        return -ESHUTDOWN;
-
-                assert(i->type == UNIT_FILE_TYPE_REGULAR);
-        }
-
-        /* This will return the number of symlink rules that were
-           supposed to be created, not the ones actually created. This
-           is useful to determine whether the passed files had any
-           installation data at all. */
-
-        return install_context_apply(scope, &c, &paths, config_path, root_dir, force, SEARCH_LOAD, changes, n_changes);
-}
-
-int unit_file_disable(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_(install_context_done) InstallContext c = {};
-        _cleanup_free_ char *config_path = NULL;
-        _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
-        char **i;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, files) {
-                if (!unit_name_is_valid(*i, UNIT_NAME_ANY))
-                        return -EINVAL;
-
-                r = install_info_add(&c, *i, NULL, NULL);
-                if (r < 0)
-                        return r;
-        }
-
-        r = install_context_mark_for_removal(scope, &c, &paths, &remove_symlinks_to, config_path, root_dir);
-        if (r < 0)
-                return r;
-
-        return remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
-}
-
-int unit_file_reenable(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        char **n;
-        int r;
-        size_t l, i;
-
-        /* First, we invoke the disable command with only the basename... */
-        l = strv_length(files);
-        n = newa(char*, l+1);
-        for (i = 0; i < l; i++)
-                n[i] = basename(files[i]);
-        n[i] = NULL;
-
-        r = unit_file_disable(scope, runtime, root_dir, n, changes, n_changes);
-        if (r < 0)
-                return r;
-
-        /* But the enable command with the full name */
-        return unit_file_enable(scope, runtime, root_dir, files, force, changes, n_changes);
-}
-
-int unit_file_set_default(
-                UnitFileScope scope,
-                const char *root_dir,
-                const char *name,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_(install_context_done) InstallContext c = {};
-        _cleanup_free_ char *config_path = NULL;
-        UnitFileInstallInfo *i;
-        const char *path;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(name);
-
-        if (unit_name_to_type(name) != UNIT_TARGET)
-                return -EINVAL;
-        if (streq(name, SPECIAL_DEFAULT_TARGET))
-                return -EINVAL;
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, false, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        r = install_info_discover(scope, &c, root_dir, &paths, name, 0, &i);
-        if (r < 0)
-                return r;
-        if (i->type == UNIT_FILE_TYPE_MASKED)
-                return -ESHUTDOWN;
-
-        path = strjoina(config_path, "/" SPECIAL_DEFAULT_TARGET);
-
-        return create_symlink(i->path, path, force, changes, n_changes);
-}
-
-int unit_file_get_default(
-                UnitFileScope scope,
-                const char *root_dir,
-                char **name) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_(install_context_done) InstallContext c = {};
-        UnitFileInstallInfo *i;
-        char *n;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(name);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = install_info_discover(scope, &c, root_dir, &paths, SPECIAL_DEFAULT_TARGET, SEARCH_FOLLOW_CONFIG_SYMLINKS, &i);
-        if (r < 0)
-                return r;
-        if (i->type == UNIT_FILE_TYPE_MASKED)
-                return -ESHUTDOWN;
-
-        n = strdup(i->name);
-        if (!n)
-                return -ENOMEM;
-
-        *name = n;
-        return 0;
-}
-
-int unit_file_lookup_state(
-                UnitFileScope scope,
-                const char *root_dir,
-                const LookupPaths *paths,
-                const char *name,
-                UnitFileState *ret) {
-
-        _cleanup_(install_context_done) InstallContext c = {};
-        UnitFileInstallInfo *i;
-        UnitFileState state;
-        int r;
-
-        assert(paths);
-        assert(name);
-
-        if (!unit_name_is_valid(name, UNIT_NAME_ANY))
-                return -EINVAL;
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = install_info_discover(scope, &c, root_dir, paths, name, SEARCH_LOAD|SEARCH_FOLLOW_CONFIG_SYMLINKS, &i);
-        if (r < 0)
-                return r;
-
-        /* Shortcut things, if the caller just wants to know if this unit exists. */
-        if (!ret)
-                return 0;
-
-        switch (i->type) {
-
-        case UNIT_FILE_TYPE_MASKED:
-                state = path_startswith(i->path, "/run") ? UNIT_FILE_MASKED_RUNTIME : UNIT_FILE_MASKED;
-                break;
-
-        case UNIT_FILE_TYPE_REGULAR:
-                r = find_symlinks_in_scope(scope, root_dir, i->name, &state);
-                if (r < 0)
-                        return r;
-                if (r == 0) {
-                        if (UNIT_FILE_INSTALL_INFO_HAS_RULES(i))
-                                state = UNIT_FILE_DISABLED;
-                        else if (UNIT_FILE_INSTALL_INFO_HAS_ALSO(i))
-                                state = UNIT_FILE_INDIRECT;
-                        else
-                                state = UNIT_FILE_STATIC;
-                }
-
-                break;
-
-        default:
-                assert_not_reached("Unexpect unit file type.");
-        }
-
-        *ret = state;
-        return 0;
-}
-
-int unit_file_get_state(
-                UnitFileScope scope,
-                const char *root_dir,
-                const char *name,
-                UnitFileState *ret) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(name);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        return unit_file_lookup_state(scope, root_dir, &paths, name, ret);
-}
-
-int unit_file_query_preset(UnitFileScope scope, const char *root_dir, const char *name) {
-        _cleanup_strv_free_ char **files = NULL;
-        char **p;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(name);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        if (!unit_name_is_valid(name, UNIT_NAME_ANY))
-                return -EINVAL;
-
-        if (scope == UNIT_FILE_SYSTEM)
-                r = conf_files_list(&files, ".preset", root_dir,
-                                    "/etc/systemd/system-preset",
-                                    "/usr/local/lib/systemd/system-preset",
-                                    "/usr/lib/systemd/system-preset",
-#ifdef HAVE_SPLIT_USR
-                                    "/lib/systemd/system-preset",
-#endif
-                                    NULL);
-        else if (scope == UNIT_FILE_GLOBAL)
-                r = conf_files_list(&files, ".preset", root_dir,
-                                    "/etc/systemd/user-preset",
-                                    "/usr/local/lib/systemd/user-preset",
-                                    "/usr/lib/systemd/user-preset",
-                                    NULL);
-        else
-                return 1; /* Default is "enable" */
-
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(p, files) {
-                _cleanup_fclose_ FILE *f;
-                char line[LINE_MAX];
-
-                f = fopen(*p, "re");
-                if (!f) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                FOREACH_LINE(line, f, return -errno) {
-                        const char *parameter;
-                        char *l;
-
-                        l = strstrip(line);
-
-                        if (isempty(l))
-                                continue;
-                        if (strchr(COMMENTS, *l))
-                                continue;
-
-                        parameter = first_word(l, "enable");
-                        if (parameter) {
-                                if (fnmatch(parameter, name, FNM_NOESCAPE) == 0) {
-                                        log_debug("Preset file says enable %s.", name);
-                                        return 1;
-                                }
-
-                                continue;
-                        }
-
-                        parameter = first_word(l, "disable");
-                        if (parameter) {
-                                if (fnmatch(parameter, name, FNM_NOESCAPE) == 0) {
-                                        log_debug("Preset file says disable %s.", name);
-                                        return 0;
-                                }
-
-                                continue;
-                        }
-
-                        log_debug("Couldn't parse line '%s'", l);
-                }
-        }
-
-        /* Default is "enable" */
-        log_debug("Preset file doesn't say anything about %s, enabling.", name);
-        return 1;
-}
-
-static int execute_preset(
-                UnitFileScope scope,
-                InstallContext *plus,
-                InstallContext *minus,
-                const LookupPaths *paths,
-                const char *config_path,
-                const char *root_dir,
-                char **files,
-                UnitFilePresetMode mode,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        int r;
-
-        assert(plus);
-        assert(minus);
-        assert(paths);
-        assert(config_path);
-
-        if (mode != UNIT_FILE_PRESET_ENABLE_ONLY) {
-                _cleanup_set_free_free_ Set *remove_symlinks_to = NULL;
-
-                r = install_context_mark_for_removal(scope, minus, paths, &remove_symlinks_to, config_path, root_dir);
-                if (r < 0)
-                        return r;
-
-                r = remove_marked_symlinks(remove_symlinks_to, config_path, changes, n_changes);
-        } else
-                r = 0;
-
-        if (mode != UNIT_FILE_PRESET_DISABLE_ONLY) {
-                int q;
-
-                /* Returns number of symlinks that where supposed to be installed. */
-                q = install_context_apply(scope, plus, paths, config_path, root_dir, force, SEARCH_LOAD, changes, n_changes);
-                if (r >= 0) {
-                        if (q < 0)
-                                r = q;
-                        else
-                                r+= q;
-                }
-        }
-
-        return r;
-}
-
-static int preset_prepare_one(
-                UnitFileScope scope,
-                InstallContext *plus,
-                InstallContext *minus,
-                LookupPaths *paths,
-                const char *root_dir,
-                UnitFilePresetMode mode,
-                const char *name) {
-
-        UnitFileInstallInfo *i;
-        int r;
-
-        if (install_info_find(plus, name) ||
-            install_info_find(minus, name))
-                return 0;
-
-        r = unit_file_query_preset(scope, root_dir, name);
-        if (r < 0)
-                return r;
-
-        if (r > 0) {
-                r = install_info_discover(scope, plus, root_dir, paths, name, SEARCH_LOAD|SEARCH_FOLLOW_CONFIG_SYMLINKS, &i);
-                if (r < 0)
-                        return r;
-
-                if (i->type == UNIT_FILE_TYPE_MASKED)
-                        return -ESHUTDOWN;
-        } else
-                r = install_info_discover(scope, minus, root_dir, paths, name, SEARCH_FOLLOW_CONFIG_SYMLINKS, &i);
-
-        return r;
-}
-
-int unit_file_preset(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                char **files,
-                UnitFilePresetMode mode,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_(install_context_done) InstallContext plus = {}, minus = {};
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_free_ char *config_path = NULL;
-        char **i;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(mode < _UNIT_FILE_PRESET_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, files) {
-                if (!unit_name_is_valid(*i, UNIT_NAME_ANY))
-                        return -EINVAL;
-
-                r = preset_prepare_one(scope, &plus, &minus, &paths, root_dir, mode, *i);
-                if (r < 0)
-                        return r;
-        }
-
-        return execute_preset(scope, &plus, &minus, &paths, config_path, root_dir, files, mode, force, changes, n_changes);
-}
-
-int unit_file_preset_all(
-                UnitFileScope scope,
-                bool runtime,
-                const char *root_dir,
-                UnitFilePresetMode mode,
-                bool force,
-                UnitFileChange **changes,
-                unsigned *n_changes) {
-
-        _cleanup_(install_context_done) InstallContext plus = {}, minus = {};
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        _cleanup_free_ char *config_path = NULL;
-        char **i;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(mode < _UNIT_FILE_PRESET_MAX);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        r = get_config_path(scope, runtime, root_dir, &config_path);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, paths.unit_path) {
-                _cleanup_closedir_ DIR *d = NULL;
-                _cleanup_free_ char *units_dir;
-                struct dirent *de;
-
-                units_dir = path_join(root_dir, *i, NULL);
-                if (!units_dir)
-                        return -ENOMEM;
-
-                d = opendir(units_dir);
-                if (!d) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                FOREACH_DIRENT(de, d, return -errno) {
-
-                        if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY))
-                                continue;
-
-                        dirent_ensure_type(d, de);
-
-                        if (!IN_SET(de->d_type, DT_LNK, DT_REG))
-                                continue;
-
-                        r = preset_prepare_one(scope, &plus, &minus, &paths, root_dir, mode, de->d_name);
-                        if (r < 0)
-                                return r;
-                }
-        }
-
-        return execute_preset(scope, &plus, &minus, &paths, config_path, root_dir, NULL, mode, force, changes, n_changes);
-}
-
-static void unit_file_list_free_one(UnitFileList *f) {
-        if (!f)
-                return;
-
-        free(f->path);
-        free(f);
-}
-
-Hashmap* unit_file_list_free(Hashmap *h) {
-        UnitFileList *i;
-
-        while ((i = hashmap_steal_first(h)))
-                unit_file_list_free_one(i);
-
-        return hashmap_free(h);
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(UnitFileList*, unit_file_list_free_one);
-
-int unit_file_get_list(
-                UnitFileScope scope,
-                const char *root_dir,
-                Hashmap *h) {
-
-        _cleanup_lookup_paths_free_ LookupPaths paths = {};
-        char **i;
-        int r;
-
-        assert(scope >= 0);
-        assert(scope < _UNIT_FILE_SCOPE_MAX);
-        assert(h);
-
-        r = verify_root_dir(scope, &root_dir);
-        if (r < 0)
-                return r;
-
-        r = lookup_paths_init_from_scope(&paths, scope, root_dir);
-        if (r < 0)
-                return r;
-
-        STRV_FOREACH(i, paths.unit_path) {
-                _cleanup_closedir_ DIR *d = NULL;
-                _cleanup_free_ char *units_dir;
-                struct dirent *de;
-
-                units_dir = path_join(root_dir, *i, NULL);
-                if (!units_dir)
-                        return -ENOMEM;
-
-                d = opendir(units_dir);
-                if (!d) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                FOREACH_DIRENT(de, d, return -errno) {
-                        _cleanup_(unit_file_list_free_onep) UnitFileList *f = NULL;
-
-                        if (!unit_name_is_valid(de->d_name, UNIT_NAME_ANY))
-                                continue;
-
-                        if (hashmap_get(h, de->d_name))
-                                continue;
-
-                        dirent_ensure_type(d, de);
-
-                        if (!IN_SET(de->d_type, DT_LNK, DT_REG))
-                                continue;
-
-                        f = new0(UnitFileList, 1);
-                        if (!f)
-                                return -ENOMEM;
-
-                        f->path = path_make_absolute(de->d_name, units_dir);
-                        if (!f->path)
-                                return -ENOMEM;
-
-                        r = unit_file_lookup_state(scope, root_dir, &paths, basename(f->path), &f->state);
-                        if (r < 0)
-                                f->state = UNIT_FILE_BAD;
-
-                        r = hashmap_put(h, basename(f->path), f);
-                        if (r < 0)
-                                return r;
-
-                        f = NULL; /* prevent cleanup */
-                }
-        }
-
-        return 0;
-}
-
-static const char* const unit_file_state_table[_UNIT_FILE_STATE_MAX] = {
-        [UNIT_FILE_ENABLED] = "enabled",
-        [UNIT_FILE_ENABLED_RUNTIME] = "enabled-runtime",
-        [UNIT_FILE_LINKED] = "linked",
-        [UNIT_FILE_LINKED_RUNTIME] = "linked-runtime",
-        [UNIT_FILE_MASKED] = "masked",
-        [UNIT_FILE_MASKED_RUNTIME] = "masked-runtime",
-        [UNIT_FILE_STATIC] = "static",
-        [UNIT_FILE_DISABLED] = "disabled",
-        [UNIT_FILE_INDIRECT] = "indirect",
-        [UNIT_FILE_BAD] = "bad",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_file_state, UnitFileState);
-
-static const char* const unit_file_change_type_table[_UNIT_FILE_CHANGE_TYPE_MAX] = {
-        [UNIT_FILE_SYMLINK] = "symlink",
-        [UNIT_FILE_UNLINK] = "unlink",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_file_change_type, UnitFileChangeType);
-
-static const char* const unit_file_preset_mode_table[_UNIT_FILE_PRESET_MAX] = {
-        [UNIT_FILE_PRESET_FULL] = "full",
-        [UNIT_FILE_PRESET_ENABLE_ONLY] = "enable-only",
-        [UNIT_FILE_PRESET_DISABLE_ONLY] = "disable-only",
-};
-
-DEFINE_STRING_TABLE_LOOKUP(unit_file_preset_mode, UnitFilePresetMode);