Adding upstream version 255.4.upstream/255.4

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 910 insertions, 0 deletions

diff --git a/src/basic/path-lookup.c b/src/basic/path-lookup.c
new file mode 100644
index 0000000..4e3d59f
--- /dev/null
+++ b/src/basic/path-lookup.c
@@ -0,0 +1,910 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "alloc-util.h"
+#include "fs-util.h"
+#include "log.h"
+#include "macro.h"
+#include "nulstr-util.h"
+#include "path-lookup.h"
+#include "path-util.h"
+#include "stat-util.h"
+#include "string-util.h"
+#include "strv.h"
+#include "tmpfile-util.h"
+#include "user-util.h"
+
+int xdg_user_runtime_dir(char **ret, const char *suffix) {
+        const char *e;
+        char *j;
+
+        assert(ret);
+        assert(suffix);
+
+        e = getenv("XDG_RUNTIME_DIR");
+        if (!e)
+                return -ENXIO;
+
+        j = path_join(e, suffix);
+        if (!j)
+                return -ENOMEM;
+
+        *ret = j;
+        return 0;
+}
+
+int xdg_user_config_dir(char **ret, const char *suffix) {
+        _cleanup_free_ char *j = NULL;
+        const char *e;
+        int r;
+
+        assert(ret);
+
+        e = getenv("XDG_CONFIG_HOME");
+        if (e) {
+                j = path_join(e, suffix);
+                if (!j)
+                        return -ENOMEM;
+        } else {
+                r = get_home_dir(&j);
+                if (r < 0)
+                        return r;
+
+                if (!path_extend(&j, "/.config", suffix))
+                        return -ENOMEM;
+        }
+
+        *ret = TAKE_PTR(j);
+        return 0;
+}
+
+int xdg_user_data_dir(char **ret, const char *suffix) {
+        _cleanup_free_ char *j = NULL;
+        const char *e;
+        int r;
+
+        assert(ret);
+        assert(suffix);
+
+        /* We don't treat /etc/xdg/systemd here as the spec
+         * suggests because we assume that is a link to
+         * /etc/systemd/ anyway. */
+
+        e = getenv("XDG_DATA_HOME");
+        if (e) {
+                j = path_join(e, suffix);
+                if (!j)
+                        return -ENOMEM;
+        } else {
+                r = get_home_dir(&j);
+                if (r < 0)
+                        return r;
+
+                if (!path_extend(&j, "/.local/share", suffix))
+                        return -ENOMEM;
+        }
+
+        *ret = TAKE_PTR(j);
+        return 1;
+}
+
+static const char* const user_data_unit_paths[] = {
+        "/usr/local/lib/systemd/user",
+        "/usr/local/share/systemd/user",
+        USER_DATA_UNIT_DIR,
+        "/usr/lib/systemd/user",
+        "/usr/share/systemd/user",
+        NULL
+};
+
+static const char* const user_config_unit_paths[] = {
+        USER_CONFIG_UNIT_DIR,
+        "/etc/systemd/user",
+        NULL
+};
+
+int xdg_user_dirs(char ***ret_config_dirs, char ***ret_data_dirs) {
+        /* Implement the mechanisms defined in
+         *
+         * https://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
+         *
+         * We look in both the config and the data dirs because we
+         * want to encourage that distributors ship their unit files
+         * as data, and allow overriding as configuration.
+         */
+        const char *e;
+        _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
+
+        e = getenv("XDG_CONFIG_DIRS");
+        if (e)
+                config_dirs = strv_split(e, ":");
+        else
+                config_dirs = strv_new("/etc/xdg");
+        if (!config_dirs)
+                return -ENOMEM;
+
+        e = getenv("XDG_DATA_DIRS");
+        if (e)
+                data_dirs = strv_split(e, ":");
+        else
+                data_dirs = strv_new("/usr/local/share",
+                                     "/usr/share");
+        if (!data_dirs)
+                return -ENOMEM;
+
+        *ret_config_dirs = TAKE_PTR(config_dirs);
+        *ret_data_dirs = TAKE_PTR(data_dirs);
+
+        return 0;
+}
+
+static char** user_dirs(
+                const char *persistent_config,
+                const char *runtime_config,
+                const char *global_persistent_config,
+                const char *global_runtime_config,
+                const char *generator,
+                const char *generator_early,
+                const char *generator_late,
+                const char *transient,
+                const char *persistent_control,
+                const char *runtime_control) {
+
+        _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
+        _cleanup_free_ char *data_home = NULL;
+        _cleanup_strv_free_ char **res = NULL;
+        int r;
+
+        r = xdg_user_dirs(&config_dirs, &data_dirs);
+        if (r < 0)
+                return NULL;
+
+        r = xdg_user_data_dir(&data_home, "/systemd/user");
+        if (r < 0 && r != -ENXIO)
+                return NULL;
+
+        /* Now merge everything we found. */
+        if (strv_extend(&res, persistent_control) < 0)
+                return NULL;
+
+        if (strv_extend(&res, runtime_control) < 0)
+                return NULL;
+
+        if (strv_extend(&res, transient) < 0)
+                return NULL;
+
+        if (strv_extend(&res, generator_early) < 0)
+                return NULL;
+
+        if (strv_extend(&res, persistent_config) < 0)
+                return NULL;
+
+        if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0)
+                return NULL;
+
+        /* global config has lower priority than the user config of the same type */
+        if (strv_extend(&res, global_persistent_config) < 0)
+                return NULL;
+
+        if (strv_extend_strv(&res, (char**) user_config_unit_paths, false) < 0)
+                return NULL;
+
+        if (strv_extend(&res, runtime_config) < 0)
+                return NULL;
+
+        if (strv_extend(&res, global_runtime_config) < 0)
+                return NULL;
+
+        if (strv_extend(&res, generator) < 0)
+                return NULL;
+
+        if (strv_extend(&res, data_home) < 0)
+                return NULL;
+
+        if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0)
+                return NULL;
+
+        if (strv_extend_strv(&res, (char**) user_data_unit_paths, false) < 0)
+                return NULL;
+
+        if (strv_extend(&res, generator_late) < 0)
+                return NULL;
+
+        if (path_strv_make_absolute_cwd(res) < 0)
+                return NULL;
+
+        return TAKE_PTR(res);
+}
+
+bool path_is_user_data_dir(const char *path) {
+        assert(path);
+
+        return strv_contains((char**) user_data_unit_paths, path);
+}
+
+bool path_is_user_config_dir(const char *path) {
+        assert(path);
+
+        return strv_contains((char**) user_config_unit_paths, path);
+}
+
+static int acquire_generator_dirs(
+                RuntimeScope scope,
+                const char *tempdir,
+                char **generator,
+                char **generator_early,
+                char **generator_late) {
+
+        _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL, *p = NULL;
+        const char *prefix;
+
+        assert(generator);
+        assert(generator_early);
+        assert(generator_late);
+        assert(IN_SET(scope, RUNTIME_SCOPE_SYSTEM, RUNTIME_SCOPE_USER, RUNTIME_SCOPE_GLOBAL));
+
+        if (scope == RUNTIME_SCOPE_GLOBAL)
+                return -EOPNOTSUPP;
+
+        if (tempdir)
+                prefix = tempdir;
+        else if (scope == RUNTIME_SCOPE_SYSTEM)
+                prefix = "/run/systemd";
+        else {
+                /* RUNTIME_SCOPE_USER */
+                const char *e;
+
+                e = getenv("XDG_RUNTIME_DIR");
+                if (!e)
+                        return -ENXIO;
+
+                p = path_join(e, "/systemd");
+                if (!p)
+                        return -ENOMEM;
+
+                prefix = p;
+        }
+
+        x = path_join(prefix, "generator");
+        if (!x)
+                return -ENOMEM;
+
+        y = path_join(prefix, "generator.early");
+        if (!y)
+                return -ENOMEM;
+
+        z = path_join(prefix, "generator.late");
+        if (!z)
+                return -ENOMEM;
+
+        *generator = TAKE_PTR(x);
+        *generator_early = TAKE_PTR(y);
+        *generator_late = TAKE_PTR(z);
+
+        return 0;
+}
+
+static int acquire_transient_dir(
+                RuntimeScope scope,
+                const char *tempdir,
+                char **ret) {
+
+        char *transient;
+
+        assert(ret);
+        assert(IN_SET(scope, RUNTIME_SCOPE_SYSTEM, RUNTIME_SCOPE_USER, RUNTIME_SCOPE_GLOBAL));
+
+        if (scope == RUNTIME_SCOPE_GLOBAL)
+                return -EOPNOTSUPP;
+
+        if (tempdir)
+                transient = path_join(tempdir, "transient");
+        else if (scope == RUNTIME_SCOPE_SYSTEM)
+                transient = strdup("/run/systemd/transient");
+        else
+                return xdg_user_runtime_dir(ret, "/systemd/transient");
+
+        if (!transient)
+                return -ENOMEM;
+        *ret = transient;
+        return 0;
+}
+
+static int acquire_config_dirs(RuntimeScope scope, char **persistent, char **runtime) {
+        _cleanup_free_ char *a = NULL, *b = NULL;
+        int r;
+
+        assert(persistent);
+        assert(runtime);
+
+        switch (scope) {
+
+        case RUNTIME_SCOPE_SYSTEM:
+                a = strdup(SYSTEM_CONFIG_UNIT_DIR);
+                b = strdup("/run/systemd/system");
+                break;
+
+        case RUNTIME_SCOPE_GLOBAL:
+                a = strdup(USER_CONFIG_UNIT_DIR);
+                b = strdup("/run/systemd/user");
+                break;
+
+        case RUNTIME_SCOPE_USER:
+                r = xdg_user_config_dir(&a, "/systemd/user");
+                if (r < 0 && r != -ENXIO)
+                        return r;
+
+                r = xdg_user_runtime_dir(runtime, "/systemd/user");
+                if (r < 0) {
+                        if (r != -ENXIO)
+                                return r;
+
+                        /* If XDG_RUNTIME_DIR is not set, don't consider that fatal, simply initialize the runtime
+                         * directory to NULL */
+                        *runtime = NULL;
+                }
+
+                *persistent = TAKE_PTR(a);
+
+                return 0;
+
+        default:
+                assert_not_reached();
+        }
+
+        if (!a || !b)
+                return -ENOMEM;
+
+        *persistent = TAKE_PTR(a);
+        *runtime = TAKE_PTR(b);
+
+        return 0;
+}
+
+static int acquire_control_dirs(RuntimeScope scope, char **persistent, char **runtime) {
+        _cleanup_free_ char *a = NULL;
+        int r;
+
+        assert(persistent);
+        assert(runtime);
+
+        switch (scope) {
+
+        case RUNTIME_SCOPE_SYSTEM:  {
+                _cleanup_free_ char *b = NULL;
+
+                a = strdup("/etc/systemd/system.control");
+                if (!a)
+                        return -ENOMEM;
+
+                b = strdup("/run/systemd/system.control");
+                if (!b)
+                        return -ENOMEM;
+
+                *runtime = TAKE_PTR(b);
+
+                break;
+        }
+
+        case RUNTIME_SCOPE_USER:
+                r = xdg_user_config_dir(&a, "/systemd/user.control");
+                if (r < 0 && r != -ENXIO)
+                        return r;
+
+                r = xdg_user_runtime_dir(runtime, "/systemd/user.control");
+                if (r < 0) {
+                        if (r != -ENXIO)
+                                return r;
+
+                        /* If XDG_RUNTIME_DIR is not set, don't consider this fatal, simply initialize the directory to
+                         * NULL */
+                        *runtime = NULL;
+                }
+
+                break;
+
+        case RUNTIME_SCOPE_GLOBAL:
+                return -EOPNOTSUPP;
+
+        default:
+                assert_not_reached();
+        }
+
+        *persistent = TAKE_PTR(a);
+
+        return 0;
+}
+
+static int acquire_attached_dirs(
+                RuntimeScope scope,
+                char **ret_persistent,
+                char **ret_runtime) {
+
+        _cleanup_free_ char *a = NULL, *b = NULL;
+
+        assert(ret_persistent);
+        assert(ret_runtime);
+
+        /* Portable services are not available to regular users for now. */
+        if (scope != RUNTIME_SCOPE_SYSTEM)
+                return -EOPNOTSUPP;
+
+        a = strdup("/etc/systemd/system.attached");
+        if (!a)
+                return -ENOMEM;
+
+        b = strdup("/run/systemd/system.attached");
+        if (!b)
+                return -ENOMEM;
+
+        *ret_persistent = TAKE_PTR(a);
+        *ret_runtime = TAKE_PTR(b);
+
+        return 0;
+}
+
+static int patch_root_prefix(char **p, const char *root_dir) {
+        char *c;
+
+        assert(p);
+
+        if (!*p)
+                return 0;
+
+        c = path_join(root_dir, *p);
+        if (!c)
+                return -ENOMEM;
+
+        free_and_replace(*p, c);
+        return 0;
+}
+
+static int patch_root_prefix_strv(char **l, const char *root_dir) {
+        int r;
+
+        if (!root_dir)
+                return 0;
+
+        STRV_FOREACH(i, l) {
+                r = patch_root_prefix(i, root_dir);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+static int get_paths_from_environ(const char *var, char ***paths, bool *append) {
+        const char *e;
+        int r;
+
+        assert(var);
+        assert(paths);
+        assert(append);
+
+        *append = false;
+
+        e = getenv(var);
+        if (e) {
+                const char *k;
+
+                k = endswith(e, ":");
+                if (k) {
+                        e = strndupa_safe(e, k - e);
+                        *append = true;
+                }
+
+                /* FIXME: empty components in other places should be rejected. */
+
+                r = path_split_and_make_absolute(e, paths);
+                if (r < 0)
+                        return r;
+        }
+
+        return 0;
+}
+
+int lookup_paths_init(
+                LookupPaths *lp,
+                RuntimeScope scope,
+                LookupPathsFlags flags,
+                const char *root_dir) {
+
+        _cleanup_(rmdir_and_freep) char *tempdir = NULL;
+        _cleanup_free_ char
+                *root = NULL,
+                *persistent_config = NULL, *runtime_config = NULL,
+                *global_persistent_config = NULL, *global_runtime_config = NULL,
+                *generator = NULL, *generator_early = NULL, *generator_late = NULL,
+                *transient = NULL,
+                *persistent_control = NULL, *runtime_control = NULL,
+                *persistent_attached = NULL, *runtime_attached = NULL;
+        bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */
+        _cleanup_strv_free_ char **paths = NULL;
+        int r;
+
+        assert(lp);
+        assert(scope >= 0);
+        assert(scope < _RUNTIME_SCOPE_MAX);
+
+        if (!empty_or_root(root_dir)) {
+                if (scope == RUNTIME_SCOPE_USER)
+                        return -EINVAL;
+
+                r = is_dir(root_dir, true);
+                if (r < 0)
+                        return r;
+                if (r == 0)
+                        return -ENOTDIR;
+
+                root = strdup(root_dir);
+                if (!root)
+                        return -ENOMEM;
+        }
+
+        if (flags & LOOKUP_PATHS_TEMPORARY_GENERATED) {
+                r = mkdtemp_malloc("/tmp/systemd-temporary-XXXXXX", &tempdir);
+                if (r < 0)
+                        return log_debug_errno(r, "Failed to create temporary directory: %m");
+        }
+
+        /* Note: when XDG_RUNTIME_DIR is not set this will not return -ENXIO, but simply set runtime_config to NULL */
+        r = acquire_config_dirs(scope, &persistent_config, &runtime_config);
+        if (r < 0)
+                return r;
+
+        if (scope == RUNTIME_SCOPE_USER) {
+                r = acquire_config_dirs(RUNTIME_SCOPE_GLOBAL, &global_persistent_config, &global_runtime_config);
+                if (r < 0)
+                        return r;
+        }
+
+        if ((flags & LOOKUP_PATHS_EXCLUDE_GENERATED) == 0) {
+                /* Note: if XDG_RUNTIME_DIR is not set, this will fail completely with ENXIO */
+                r = acquire_generator_dirs(scope, tempdir,
+                                           &generator, &generator_early, &generator_late);
+                if (r < 0 && !IN_SET(r, -EOPNOTSUPP, -ENXIO))
+                        return r;
+        }
+
+        /* Note: if XDG_RUNTIME_DIR is not set, this will fail completely with ENXIO */
+        r = acquire_transient_dir(scope, tempdir, &transient);
+        if (r < 0 && !IN_SET(r, -EOPNOTSUPP, -ENXIO))
+                return r;
+
+        /* Note: when XDG_RUNTIME_DIR is not set this will not return -ENXIO, but simply set runtime_control to NULL */
+        r = acquire_control_dirs(scope, &persistent_control, &runtime_control);
+        if (r < 0 && r != -EOPNOTSUPP)
+                return r;
+
+        r = acquire_attached_dirs(scope, &persistent_attached, &runtime_attached);
+        if (r < 0 && r != -EOPNOTSUPP)
+                return r;
+
+        /* First priority is whatever has been passed to us via env vars */
+        r = get_paths_from_environ("SYSTEMD_UNIT_PATH", &paths, &append);
+        if (r < 0)
+                return r;
+
+        if (!paths || append) {
+                /* Let's figure something out. */
+
+                _cleanup_strv_free_ char **add = NULL;
+
+                /* For the user units we include share/ in the search
+                 * path in order to comply with the XDG basedir spec.
+                 * For the system stuff we avoid such nonsense. OTOH
+                 * we include /lib in the search path for the system
+                 * stuff but avoid it for user stuff. */
+
+                switch (scope) {
+
+                case RUNTIME_SCOPE_SYSTEM:
+                        add = strv_new(
+                                        /* If you modify this you also want to modify
+                                         * systemdsystemunitpath= in systemd.pc.in! */
+                                        STRV_IFNOTNULL(persistent_control),
+                                        STRV_IFNOTNULL(runtime_control),
+                                        STRV_IFNOTNULL(transient),
+                                        STRV_IFNOTNULL(generator_early),
+                                        persistent_config,
+                                        SYSTEM_CONFIG_UNIT_DIR,
+                                        "/etc/systemd/system",
+                                        STRV_IFNOTNULL(persistent_attached),
+                                        runtime_config,
+                                        "/run/systemd/system",
+                                        STRV_IFNOTNULL(runtime_attached),
+                                        STRV_IFNOTNULL(generator),
+                                        "/usr/local/lib/systemd/system",
+                                        SYSTEM_DATA_UNIT_DIR,
+                                        "/usr/lib/systemd/system",
+                                        /* To be used ONLY for images which might be legacy split-usr */
+                                        STRV_IFNOTNULL(flags & LOOKUP_PATHS_SPLIT_USR ? "/lib/systemd/system" : NULL),
+                                        STRV_IFNOTNULL(generator_late));
+                        break;
+
+                case RUNTIME_SCOPE_GLOBAL:
+                        add = strv_new(
+                                        /* If you modify this you also want to modify
+                                         * systemduserunitpath= in systemd.pc.in, and
+                                         * the arrays in user_dirs() above! */
+                                        STRV_IFNOTNULL(persistent_control),
+                                        STRV_IFNOTNULL(runtime_control),
+                                        STRV_IFNOTNULL(transient),
+                                        STRV_IFNOTNULL(generator_early),
+                                        persistent_config,
+                                        USER_CONFIG_UNIT_DIR,
+                                        "/etc/systemd/user",
+                                        runtime_config,
+                                        "/run/systemd/user",
+                                        STRV_IFNOTNULL(generator),
+                                        "/usr/local/share/systemd/user",
+                                        "/usr/share/systemd/user",
+                                        "/usr/local/lib/systemd/user",
+                                        USER_DATA_UNIT_DIR,
+                                        "/usr/lib/systemd/user",
+                                        STRV_IFNOTNULL(generator_late));
+                        break;
+
+                case RUNTIME_SCOPE_USER:
+                        add = user_dirs(persistent_config, runtime_config,
+                                        global_persistent_config, global_runtime_config,
+                                        generator, generator_early, generator_late,
+                                        transient,
+                                        persistent_control, runtime_control);
+                        break;
+
+                default:
+                        assert_not_reached();
+                }
+
+                if (!add)
+                        return -ENOMEM;
+
+                if (paths) {
+                        r = strv_extend_strv(&paths, add, true);
+                        if (r < 0)
+                                return r;
+                } else
+                        /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
+                         * and don't have to copy anything */
+                        paths = TAKE_PTR(add);
+        }
+
+        r = patch_root_prefix(&persistent_config, root);
+        if (r < 0)
+                return r;
+        r = patch_root_prefix(&runtime_config, root);
+        if (r < 0)
+                return r;
+
+        r = patch_root_prefix(&generator, root);
+        if (r < 0)
+                return r;
+        r = patch_root_prefix(&generator_early, root);
+        if (r < 0)
+                return r;
+        r = patch_root_prefix(&generator_late, root);
+        if (r < 0)
+                return r;
+
+        r = patch_root_prefix(&transient, root);
+        if (r < 0)
+                return r;
+
+        r = patch_root_prefix(&persistent_control, root);
+        if (r < 0)
+                return r;
+        r = patch_root_prefix(&runtime_control, root);
+        if (r < 0)
+                return r;
+
+        r = patch_root_prefix(&persistent_attached, root);
+        if (r < 0)
+                return r;
+        r = patch_root_prefix(&runtime_attached, root);
+        if (r < 0)
+                return r;
+
+        r = patch_root_prefix_strv(paths, root);
+        if (r < 0)
+                return -ENOMEM;
+
+        *lp = (LookupPaths) {
+                .search_path = strv_uniq(TAKE_PTR(paths)),
+
+                .persistent_config = TAKE_PTR(persistent_config),
+                .runtime_config = TAKE_PTR(runtime_config),
+
+                .generator = TAKE_PTR(generator),
+                .generator_early = TAKE_PTR(generator_early),
+                .generator_late = TAKE_PTR(generator_late),
+
+                .transient = TAKE_PTR(transient),
+
+                .persistent_control = TAKE_PTR(persistent_control),
+                .runtime_control = TAKE_PTR(runtime_control),
+
+                .persistent_attached = TAKE_PTR(persistent_attached),
+                .runtime_attached = TAKE_PTR(runtime_attached),
+
+                .root_dir = TAKE_PTR(root),
+                .temporary_dir = TAKE_PTR(tempdir),
+        };
+
+        return 0;
+}
+
+int lookup_paths_init_or_warn(LookupPaths *lp, RuntimeScope scope, LookupPathsFlags flags, const char *root_dir) {
+        int r;
+
+        r = lookup_paths_init(lp, scope, flags, root_dir);
+        if (r < 0)
+                return log_error_errno(r, "Failed to initialize unit search paths%s%s: %m",
+                                       isempty(root_dir) ? "" : " for root directory ", strempty(root_dir));
+        return r;
+}
+
+void lookup_paths_free(LookupPaths *lp) {
+        if (!lp)
+                return;
+
+        lp->search_path = strv_free(lp->search_path);
+
+        lp->persistent_config = mfree(lp->persistent_config);
+        lp->runtime_config = mfree(lp->runtime_config);
+
+        lp->persistent_attached = mfree(lp->persistent_attached);
+        lp->runtime_attached = mfree(lp->runtime_attached);
+
+        lp->generator = mfree(lp->generator);
+        lp->generator_early = mfree(lp->generator_early);
+        lp->generator_late = mfree(lp->generator_late);
+
+        lp->transient = mfree(lp->transient);
+
+        lp->persistent_control = mfree(lp->persistent_control);
+        lp->runtime_control = mfree(lp->runtime_control);
+
+        lp->root_dir = mfree(lp->root_dir);
+        lp->temporary_dir = mfree(lp->temporary_dir);
+}
+
+void lookup_paths_log(LookupPaths *lp) {
+        assert(lp);
+
+        if (strv_isempty(lp->search_path)) {
+                log_debug("Ignoring unit files.");
+                lp->search_path = strv_free(lp->search_path);
+        } else {
+                _cleanup_free_ char *t = NULL;
+
+                t = strv_join(lp->search_path, "\n\t");
+                log_debug("Looking for unit files in (higher priority first):\n\t%s", strna(t));
+        }
+}
+
+char **generator_binary_paths(RuntimeScope scope) {
+        bool append = false; /* Add items from SYSTEMD_GENERATOR_PATH before normal directories */
+        _cleanup_strv_free_ char **paths = NULL;
+        int r;
+
+        /* First priority is whatever has been passed to us via env vars */
+        r = get_paths_from_environ("SYSTEMD_GENERATOR_PATH", &paths, &append);
+        if (r < 0)
+                return NULL;
+
+        if (!paths || append) {
+                _cleanup_strv_free_ char **add = NULL;
+
+                switch (scope) {
+
+                case RUNTIME_SCOPE_SYSTEM:
+                        add = strv_new("/run/systemd/system-generators",
+                                       "/etc/systemd/system-generators",
+                                       "/usr/local/lib/systemd/system-generators",
+                                       SYSTEM_GENERATOR_DIR);
+                        break;
+
+                case RUNTIME_SCOPE_GLOBAL:
+                case RUNTIME_SCOPE_USER:
+                        add = strv_new("/run/systemd/user-generators",
+                                       "/etc/systemd/user-generators",
+                                       "/usr/local/lib/systemd/user-generators",
+                                       USER_GENERATOR_DIR);
+                        break;
+
+                default:
+                        assert_not_reached();
+                }
+                if (!add)
+                        return NULL;
+
+                if (paths) {
+                        r = strv_extend_strv(&paths, add, true);
+                        if (r < 0)
+                                return NULL;
+                } else
+                        /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
+                         * and don't have to copy anything */
+                        paths = TAKE_PTR(add);
+        }
+
+        return TAKE_PTR(paths);
+}
+
+char **env_generator_binary_paths(RuntimeScope runtime_scope) {
+        _cleanup_strv_free_ char **paths = NULL, **add = NULL;
+        bool append = false; /* Add items from SYSTEMD_ENVIRONMENT_GENERATOR_PATH before normal directories */
+        int r;
+
+        /* First priority is whatever has been passed to us via env vars */
+        r = get_paths_from_environ("SYSTEMD_ENVIRONMENT_GENERATOR_PATH", &paths, &append);
+        if (r < 0)
+                return NULL;
+
+        if (!paths || append) {
+                switch (runtime_scope) {
+
+                case RUNTIME_SCOPE_SYSTEM:
+                        add = strv_new("/run/systemd/system-environment-generators",
+                                        "/etc/systemd/system-environment-generators",
+                                        "/usr/local/lib/systemd/system-environment-generators",
+                                        SYSTEM_ENV_GENERATOR_DIR);
+                        break;
+
+                case RUNTIME_SCOPE_USER:
+                        add = strv_new("/run/systemd/user-environment-generators",
+                                       "/etc/systemd/user-environment-generators",
+                                       "/usr/local/lib/systemd/user-environment-generators",
+                                       USER_ENV_GENERATOR_DIR);
+                        break;
+
+                default:
+                        assert_not_reached();
+                }
+                if (!add)
+                        return NULL;
+        }
+
+        if (paths) {
+                r = strv_extend_strv(&paths, add, true);
+                if (r < 0)
+                        return NULL;
+        } else
+                /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
+                 * and don't have to copy anything */
+                paths = TAKE_PTR(add);
+
+        return TAKE_PTR(paths);
+}
+
+int find_portable_profile(const char *name, const char *unit, char **ret_path) {
+        const char *dot;
+
+        assert(name);
+        assert(ret_path);
+
+        assert_se(dot = strrchr(unit, '.'));
+
+        NULSTR_FOREACH(p, PORTABLE_PROFILE_DIRS) {
+                _cleanup_free_ char *joined = NULL;
+
+                joined = strjoin(p, "/", name, "/", dot + 1, ".conf");
+                if (!joined)
+                        return -ENOMEM;
+
+                if (laccess(joined, F_OK) >= 0) {
+                        *ret_path = TAKE_PTR(joined);
+                        return 0;
+                }
+
+                if (errno != ENOENT)
+                        return -errno;
+        }
+
+        return -ENOENT;
+}