1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
4 This file is part of systemd.
6 Copyright 2010 Lennart Poettering
8 systemd is free software; you can redistribute it and/or modify it
9 under the terms of the GNU Lesser General Public License as published by
10 the Free Software Foundation; either version 2.1 of the License, or
11 (at your option) any later version.
13 systemd is distributed in the hope that it will be useful, but
14 WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 Lesser General Public License for more details.
18 You should have received a copy of the GNU Lesser General Public License
19 along with systemd; If not, see <http://www.gnu.org/licenses/>.
32 #include "path-util.h"
33 #include "path-lookup.h"
35 static const char* const systemd_running_as_table[_SYSTEMD_RUNNING_AS_MAX] = {
36 [SYSTEMD_SYSTEM] = "system",
37 [SYSTEMD_USER] = "user"
40 DEFINE_STRING_TABLE_LOOKUP(systemd_running_as, SystemdRunningAs);
42 int user_config_home(char **config_home) {
45 e = getenv("XDG_CONFIG_HOME");
47 if (asprintf(config_home, "%s/systemd/user", e) < 0)
54 home = getenv("HOME");
56 if (asprintf(config_home, "%s/.config/systemd/user", home) < 0)
66 static char** user_dirs(
67 const char *generator,
68 const char *generator_early,
69 const char *generator_late) {
71 const char * const config_unit_paths[] = {
72 USER_CONFIG_UNIT_PATH,
78 const char * const data_unit_paths[] = {
79 "/usr/local/lib/systemd/user",
80 "/usr/local/share/systemd/user",
82 "/usr/lib/systemd/user",
83 "/usr/share/systemd/user",
88 char *config_home = NULL, *data_home = NULL;
89 char **config_dirs = NULL, **data_dirs = NULL;
92 /* Implement the mechanisms defined in
94 * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
96 * We look in both the config and the data dirs because we
97 * want to encourage that distributors ship their unit files
98 * as data, and allow overriding as configuration.
101 if (user_config_home(&config_home) < 0)
104 home = getenv("HOME");
106 e = getenv("XDG_CONFIG_DIRS");
108 config_dirs = strv_split(e, ":");
113 /* We don't treat /etc/xdg/systemd here as the spec
114 * suggests because we assume that that is a link to
115 * /etc/systemd/ anyway. */
117 e = getenv("XDG_DATA_HOME");
119 if (asprintf(&data_home, "%s/systemd/user", e) < 0)
123 if (asprintf(&data_home, "%s/.local/share/systemd/user", home) < 0)
126 /* There is really no need for two unit dirs in $HOME,
127 * except to be fully compliant with the XDG spec. We
128 * now try to link the two dirs, so that we can
129 * minimize disk seeks a little. Further down we'll
130 * then filter out this link, if it is actually is
133 mkdir_parents_label(data_home, 0777);
134 (void) symlink("../../../.config/systemd/user", data_home);
137 e = getenv("XDG_DATA_DIRS");
139 data_dirs = strv_split(e, ":");
141 data_dirs = strv_new("/usr/local/share",
147 /* Now merge everything we found. */
148 if (generator_early) {
149 t = strv_append(r, generator_early);
157 t = strv_append(r, config_home);
164 if (!strv_isempty(config_dirs)) {
165 t = strv_merge_concat(r, config_dirs, "/systemd/user");
172 t = strv_merge(r, (char**) config_unit_paths);
179 t = strv_append(r, generator);
187 t = strv_append(r, data_home);
194 if (!strv_isempty(data_dirs)) {
195 t = strv_merge_concat(r, data_dirs, "/systemd/user");
202 t = strv_merge(r, (char**) data_unit_paths);
208 if (generator_late) {
209 t = strv_append(r, generator_late);
216 if (!path_strv_make_absolute_cwd(r))
221 strv_free(config_dirs);
223 strv_free(data_dirs);
233 int lookup_paths_init(
235 SystemdRunningAs running_as,
237 const char *generator,
238 const char *generator_early,
239 const char *generator_late) {
245 /* First priority is whatever has been passed to us via env
247 e = getenv("SYSTEMD_UNIT_PATH");
249 p->unit_path = path_split_and_make_absolute(e);
255 if (strv_isempty(p->unit_path)) {
256 /* Nothing is set, so let's figure something out. */
257 strv_free(p->unit_path);
259 /* For the user units we include share/ in the search
260 * path in order to comply with the XDG basedir
261 * spec. For the system stuff we avoid such
262 * nonsense. OTOH we include /lib in the search path
263 * for the system stuff but avoid it for user
266 if (running_as == SYSTEMD_USER) {
269 p->unit_path = user_dirs(generator, generator_early, generator_late);
271 p->unit_path = strv_new(
272 /* If you modify this you also want to modify
273 * systemduserunitpath= in systemd.pc.in, and
274 * the arrays in user_dirs() above! */
275 STRV_IFNOTNULL(generator_early),
276 USER_CONFIG_UNIT_PATH,
279 STRV_IFNOTNULL(generator),
280 "/usr/local/lib/systemd/user",
281 "/usr/local/share/systemd/user",
283 "/usr/lib/systemd/user",
284 "/usr/share/systemd/user",
285 STRV_IFNOTNULL(generator_late),
292 p->unit_path = strv_new(
293 /* If you modify this you also want to modify
294 * systemdsystemunitpath= in systemd.pc.in! */
295 STRV_IFNOTNULL(generator_early),
296 SYSTEM_CONFIG_UNIT_PATH,
297 "/etc/systemd/system",
298 "/run/systemd/system",
299 STRV_IFNOTNULL(generator),
300 "/usr/local/lib/systemd/system",
301 SYSTEM_DATA_UNIT_PATH,
302 "/usr/lib/systemd/system",
303 #ifdef HAVE_SPLIT_USR
304 "/lib/systemd/system",
306 STRV_IFNOTNULL(generator_late),
314 if (!path_strv_canonicalize(p->unit_path))
317 strv_uniq(p->unit_path);
319 if (!strv_isempty(p->unit_path)) {
320 char _cleanup_free_ *t = strv_join(p->unit_path, "\n\t");
323 log_info("Looking for unit files in (higher priority first):\n\t%s", t);
325 log_info("Ignoring unit files.");
326 strv_free(p->unit_path);
330 if (running_as == SYSTEMD_SYSTEM) {
331 #ifdef HAVE_SYSV_COMPAT
332 /* /etc/init.d/ compatibility does not matter to users */
334 e = getenv("SYSTEMD_SYSVINIT_PATH");
336 p->sysvinit_path = path_split_and_make_absolute(e);
337 if (!p->sysvinit_path)
340 p->sysvinit_path = NULL;
342 if (strv_isempty(p->sysvinit_path)) {
343 strv_free(p->sysvinit_path);
345 p->sysvinit_path = strv_new(
346 SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */
348 if (!p->sysvinit_path)
352 e = getenv("SYSTEMD_SYSVRCND_PATH");
354 p->sysvrcnd_path = path_split_and_make_absolute(e);
355 if (!p->sysvrcnd_path)
358 p->sysvrcnd_path = NULL;
360 if (strv_isempty(p->sysvrcnd_path)) {
361 strv_free(p->sysvrcnd_path);
363 p->sysvrcnd_path = strv_new(
364 SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */
366 if (!p->sysvrcnd_path)
370 if (!path_strv_canonicalize(p->sysvinit_path))
373 if (!path_strv_canonicalize(p->sysvrcnd_path))
376 strv_uniq(p->sysvinit_path);
377 strv_uniq(p->sysvrcnd_path);
379 if (!strv_isempty(p->sysvinit_path)) {
380 char _cleanup_free_ *t = strv_join(p->sysvinit_path, "\n\t");
383 log_info("Looking for SysV init scripts in:\n\t%s", t);
385 log_info("Ignoring SysV init scripts.");
386 strv_free(p->sysvinit_path);
387 p->sysvinit_path = NULL;
390 if (!strv_isempty(p->sysvrcnd_path)) {
391 char _cleanup_free_ *t =
392 strv_join(p->sysvrcnd_path, "\n\t");
396 log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
398 log_debug("Ignoring SysV rcN.d links.");
399 strv_free(p->sysvrcnd_path);
400 p->sysvrcnd_path = NULL;
403 log_info("SysV init scripts and rcN.d links support disabled");
410 void lookup_paths_free(LookupPaths *p) {
413 strv_free(p->unit_path);
416 #ifdef HAVE_SYSV_COMPAT
417 strv_free(p->sysvinit_path);
418 strv_free(p->sysvrcnd_path);
419 p->sysvinit_path = p->sysvrcnd_path = NULL;