441 lines
15 KiB
C
441 lines
15 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2010 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include "util.h"
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#include "strv.h"
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#include "path-util.h"
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#include "path-lookup.h"
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#include "install.h"
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int user_config_home(char **config_home) {
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const char *e;
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char *r;
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e = getenv("XDG_CONFIG_HOME");
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if (e) {
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r = strappend(e, "/systemd/user");
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if (!r)
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return -ENOMEM;
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*config_home = r;
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return 1;
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} else {
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const char *home;
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home = getenv("HOME");
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if (home) {
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r = strappend(home, "/.config/systemd/user");
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if (!r)
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return -ENOMEM;
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*config_home = r;
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return 1;
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}
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}
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return 0;
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}
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int user_runtime_dir(char **runtime_dir) {
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const char *e;
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char *r;
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e = getenv("XDG_RUNTIME_DIR");
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if (e) {
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r = strappend(e, "/systemd/user");
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if (!r)
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return -ENOMEM;
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*runtime_dir = r;
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return 1;
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}
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return 0;
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}
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static int user_data_home_dir(char **dir, const char *suffix) {
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const char *e;
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char *res;
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/* We don't treat /etc/xdg/systemd here as the spec
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* suggests because we assume that that is a link to
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* /etc/systemd/ anyway. */
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e = getenv("XDG_DATA_HOME");
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if (e)
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res = strappend(e, suffix);
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else {
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const char *home;
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home = getenv("HOME");
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if (home)
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res = strjoin(home, "/.local/share", suffix, NULL);
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else
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return 0;
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}
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if (!res)
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return -ENOMEM;
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*dir = res;
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return 0;
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}
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static char** user_dirs(
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const char *generator,
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const char *generator_early,
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const char *generator_late) {
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const char * const config_unit_paths[] = {
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USER_CONFIG_UNIT_PATH,
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"/etc/systemd/user",
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NULL
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};
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const char * const runtime_unit_path = "/run/systemd/user";
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const char * const data_unit_paths[] = {
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"/usr/local/lib/systemd/user",
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"/usr/local/share/systemd/user",
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USER_DATA_UNIT_PATH,
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"/usr/lib/systemd/user",
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"/usr/share/systemd/user",
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NULL
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};
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const char *e;
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_cleanup_free_ char *config_home = NULL, *runtime_dir = NULL, *data_home = NULL;
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_cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL;
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_cleanup_free_ char **res = NULL;
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char **tmp;
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int r;
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/* Implement the mechanisms defined in
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*
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* http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
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*
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* We look in both the config and the data dirs because we
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* want to encourage that distributors ship their unit files
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* as data, and allow overriding as configuration.
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*/
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if (user_config_home(&config_home) < 0)
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return NULL;
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if (user_runtime_dir(&runtime_dir) < 0)
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return NULL;
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e = getenv("XDG_CONFIG_DIRS");
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if (e) {
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config_dirs = strv_split(e, ":");
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if (!config_dirs)
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return NULL;
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}
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r = user_data_home_dir(&data_home, "/systemd/user");
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if (r < 0)
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return NULL;
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e = getenv("XDG_DATA_DIRS");
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if (e)
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data_dirs = strv_split(e, ":");
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else
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data_dirs = strv_new("/usr/local/share",
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"/usr/share",
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NULL);
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if (!data_dirs)
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return NULL;
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/* Now merge everything we found. */
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if (generator_early)
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if (strv_extend(&res, generator_early) < 0)
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return NULL;
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if (config_home)
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if (strv_extend(&res, config_home) < 0)
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return NULL;
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if (!strv_isempty(config_dirs))
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if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0)
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return NULL;
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if (strv_extend_strv(&res, (char**) config_unit_paths) < 0)
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return NULL;
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if (runtime_dir)
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if (strv_extend(&res, runtime_dir) < 0)
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return NULL;
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if (strv_extend(&res, runtime_unit_path) < 0)
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return NULL;
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if (generator)
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if (strv_extend(&res, generator) < 0)
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return NULL;
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if (data_home)
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if (strv_extend(&res, data_home) < 0)
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return NULL;
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if (!strv_isempty(data_dirs))
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if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0)
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return NULL;
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if (strv_extend_strv(&res, (char**) data_unit_paths) < 0)
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return NULL;
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if (generator_late)
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if (strv_extend(&res, generator_late) < 0)
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return NULL;
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if (!path_strv_make_absolute_cwd(res))
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return NULL;
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tmp = res;
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res = NULL;
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return tmp;
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}
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char **generator_paths(ManagerRunningAs running_as) {
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if (running_as == MANAGER_USER)
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return strv_new("/run/systemd/user-generators",
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"/etc/systemd/user-generators",
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"/usr/local/lib/systemd/user-generators",
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USER_GENERATOR_PATH,
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NULL);
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else
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return strv_new("/run/systemd/system-generators",
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"/etc/systemd/system-generators",
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"/usr/local/lib/systemd/system-generators",
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SYSTEM_GENERATOR_PATH,
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NULL);
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}
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int lookup_paths_init(
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LookupPaths *p,
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ManagerRunningAs running_as,
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bool personal,
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const char *root_dir,
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const char *generator,
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const char *generator_early,
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const char *generator_late) {
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const char *e;
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bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */
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assert(p);
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/* First priority is whatever has been passed to us via env
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* vars */
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e = getenv("SYSTEMD_UNIT_PATH");
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if (e) {
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if (endswith(e, ":")) {
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e = strndupa(e, strlen(e) - 1);
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append = true;
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}
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/* FIXME: empty components in other places should be
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* rejected. */
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p->unit_path = path_split_and_make_absolute(e);
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if (!p->unit_path)
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return -ENOMEM;
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} else
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p->unit_path = NULL;
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if (!p->unit_path || append) {
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/* Let's figure something out. */
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_cleanup_strv_free_ char **unit_path;
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int r;
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/* For the user units we include share/ in the search
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* path in order to comply with the XDG basedir spec.
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* For the system stuff we avoid such nonsense. OTOH
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* we include /lib in the search path for the system
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* stuff but avoid it for user stuff. */
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if (running_as == MANAGER_USER) {
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if (personal)
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unit_path = user_dirs(generator, generator_early, generator_late);
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else
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unit_path = strv_new(
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/* If you modify this you also want to modify
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* systemduserunitpath= in systemd.pc.in, and
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* the arrays in user_dirs() above! */
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STRV_IFNOTNULL(generator_early),
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USER_CONFIG_UNIT_PATH,
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"/etc/systemd/user",
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"/run/systemd/user",
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STRV_IFNOTNULL(generator),
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"/usr/local/lib/systemd/user",
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"/usr/local/share/systemd/user",
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USER_DATA_UNIT_PATH,
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"/usr/lib/systemd/user",
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"/usr/share/systemd/user",
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STRV_IFNOTNULL(generator_late),
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NULL);
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} else
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unit_path = strv_new(
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/* If you modify this you also want to modify
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* systemdsystemunitpath= in systemd.pc.in! */
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STRV_IFNOTNULL(generator_early),
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SYSTEM_CONFIG_UNIT_PATH,
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"/etc/systemd/system",
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"/run/systemd/system",
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STRV_IFNOTNULL(generator),
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"/usr/local/lib/systemd/system",
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SYSTEM_DATA_UNIT_PATH,
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"/usr/lib/systemd/system",
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#ifdef HAVE_SPLIT_USR
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"/lib/systemd/system",
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#endif
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STRV_IFNOTNULL(generator_late),
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NULL);
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if (!unit_path)
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return -ENOMEM;
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r = strv_extend_strv(&p->unit_path, unit_path);
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if (r < 0)
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return r;
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}
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if (!path_strv_resolve_uniq(p->unit_path, root_dir))
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return -ENOMEM;
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if (!strv_isempty(p->unit_path)) {
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_cleanup_free_ char *t = strv_join(p->unit_path, "\n\t");
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if (!t)
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return -ENOMEM;
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log_debug("Looking for unit files in (higher priority first):\n\t%s", t);
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} else {
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log_debug("Ignoring unit files.");
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p->unit_path = strv_free(p->unit_path);
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}
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if (running_as == MANAGER_SYSTEM) {
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#ifdef HAVE_SYSV_COMPAT
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/* /etc/init.d/ compatibility does not matter to users */
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e = getenv("SYSTEMD_SYSVINIT_PATH");
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if (e) {
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p->sysvinit_path = path_split_and_make_absolute(e);
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if (!p->sysvinit_path)
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return -ENOMEM;
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} else
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p->sysvinit_path = NULL;
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if (strv_isempty(p->sysvinit_path)) {
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strv_free(p->sysvinit_path);
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p->sysvinit_path = strv_new(
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SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */
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NULL);
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if (!p->sysvinit_path)
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return -ENOMEM;
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}
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e = getenv("SYSTEMD_SYSVRCND_PATH");
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if (e) {
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p->sysvrcnd_path = path_split_and_make_absolute(e);
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if (!p->sysvrcnd_path)
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return -ENOMEM;
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} else
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p->sysvrcnd_path = NULL;
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if (strv_isempty(p->sysvrcnd_path)) {
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strv_free(p->sysvrcnd_path);
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p->sysvrcnd_path = strv_new(
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SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */
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NULL);
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if (!p->sysvrcnd_path)
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return -ENOMEM;
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}
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if (!path_strv_resolve_uniq(p->sysvinit_path, root_dir))
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return -ENOMEM;
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if (!path_strv_resolve_uniq(p->sysvrcnd_path, root_dir))
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return -ENOMEM;
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if (!strv_isempty(p->sysvinit_path)) {
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_cleanup_free_ char *t = strv_join(p->sysvinit_path, "\n\t");
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if (!t)
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return -ENOMEM;
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log_debug("Looking for SysV init scripts in:\n\t%s", t);
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} else {
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log_debug("Ignoring SysV init scripts.");
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p->sysvinit_path = strv_free(p->sysvinit_path);
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}
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if (!strv_isempty(p->sysvrcnd_path)) {
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_cleanup_free_ char *t =
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strv_join(p->sysvrcnd_path, "\n\t");
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if (!t)
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return -ENOMEM;
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log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
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} else {
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log_debug("Ignoring SysV rcN.d links.");
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p->sysvrcnd_path = strv_free(p->sysvrcnd_path);
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}
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#else
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log_debug("SysV init scripts and rcN.d links support disabled");
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#endif
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}
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return 0;
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}
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void lookup_paths_free(LookupPaths *p) {
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assert(p);
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p->unit_path = strv_free(p->unit_path);
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#ifdef HAVE_SYSV_COMPAT
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strv_free(p->sysvinit_path);
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strv_free(p->sysvrcnd_path);
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p->sysvinit_path = p->sysvrcnd_path = NULL;
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#endif
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}
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int lookup_paths_init_from_scope(LookupPaths *paths,
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UnitFileScope scope,
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const char *root_dir) {
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assert(paths);
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assert(scope >= 0);
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assert(scope < _UNIT_FILE_SCOPE_MAX);
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zero(*paths);
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return lookup_paths_init(paths,
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scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER,
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scope == UNIT_FILE_USER,
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root_dir,
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NULL, NULL, NULL);
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}
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