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Commit | Line | Data |
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84e3543e LP |
1 | /*** |
2 | This file is part of systemd. | |
3 | ||
4 | Copyright 2010 Lennart Poettering | |
5 | ||
6 | systemd is free software; you can redistribute it and/or modify it | |
5430f7f2 LP |
7 | under the terms of the GNU Lesser General Public License as published by |
8 | the Free Software Foundation; either version 2.1 of the License, or | |
84e3543e LP |
9 | (at your option) any later version. |
10 | ||
11 | systemd is distributed in the hope that it will be useful, but | |
12 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
5430f7f2 | 14 | Lesser General Public License for more details. |
84e3543e | 15 | |
5430f7f2 | 16 | You should have received a copy of the GNU Lesser General Public License |
84e3543e LP |
17 | along with systemd; If not, see <http://www.gnu.org/licenses/>. |
18 | ***/ | |
19 | ||
cf0fbc49 | 20 | #include <errno.h> |
84e3543e | 21 | #include <stdio.h> |
cf0fbc49 | 22 | #include <stdlib.h> |
67445f4e | 23 | #include <string.h> |
84e3543e | 24 | |
b5efdb8a | 25 | #include "alloc-util.h" |
a8ffe6fb | 26 | #include "install.h" |
a8fbdf54 TA |
27 | #include "log.h" |
28 | #include "macro.h" | |
07630cea | 29 | #include "path-lookup.h" |
cf0fbc49 TA |
30 | #include "path-util.h" |
31 | #include "string-util.h" | |
32 | #include "strv.h" | |
33 | #include "util.h" | |
84e3543e | 34 | |
af2d49f7 | 35 | int user_config_home(char **config_home) { |
10e87ee7 | 36 | const char *e; |
26d04f86 | 37 | char *r; |
10e87ee7 | 38 | |
07719a21 LP |
39 | e = getenv("XDG_CONFIG_HOME"); |
40 | if (e) { | |
26d04f86 LP |
41 | r = strappend(e, "/systemd/user"); |
42 | if (!r) | |
10e87ee7 LP |
43 | return -ENOMEM; |
44 | ||
26d04f86 | 45 | *config_home = r; |
10e87ee7 LP |
46 | return 1; |
47 | } else { | |
48 | const char *home; | |
49 | ||
07719a21 LP |
50 | home = getenv("HOME"); |
51 | if (home) { | |
26d04f86 LP |
52 | r = strappend(home, "/.config/systemd/user"); |
53 | if (!r) | |
10e87ee7 LP |
54 | return -ENOMEM; |
55 | ||
26d04f86 | 56 | *config_home = r; |
10e87ee7 LP |
57 | return 1; |
58 | } | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
4d5dec23 | 64 | int user_runtime_dir(char **runtime_dir) { |
718880ba SA |
65 | const char *e; |
66 | char *r; | |
67 | ||
68 | e = getenv("XDG_RUNTIME_DIR"); | |
69 | if (e) { | |
70 | r = strappend(e, "/systemd/user"); | |
71 | if (!r) | |
72 | return -ENOMEM; | |
73 | ||
4d5dec23 | 74 | *runtime_dir = r; |
718880ba SA |
75 | return 1; |
76 | } | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
e801700e ZJS |
81 | static int user_data_home_dir(char **dir, const char *suffix) { |
82 | const char *e; | |
83 | char *res; | |
84 | ||
85 | /* We don't treat /etc/xdg/systemd here as the spec | |
86 | * suggests because we assume that that is a link to | |
87 | * /etc/systemd/ anyway. */ | |
88 | ||
89 | e = getenv("XDG_DATA_HOME"); | |
90 | if (e) | |
91 | res = strappend(e, suffix); | |
92 | else { | |
93 | const char *home; | |
94 | ||
95 | home = getenv("HOME"); | |
96 | if (home) | |
97 | res = strjoin(home, "/.local/share", suffix, NULL); | |
98 | else | |
99 | return 0; | |
100 | } | |
101 | if (!res) | |
102 | return -ENOMEM; | |
103 | ||
104 | *dir = res; | |
105 | return 0; | |
106 | } | |
107 | ||
07719a21 | 108 | static char** user_dirs( |
a0f84a10 LP |
109 | const char *persistent_config, |
110 | const char *runtime_config, | |
07719a21 LP |
111 | const char *generator, |
112 | const char *generator_early, | |
113 | const char *generator_late) { | |
114 | ||
f437d5d2 | 115 | const char * const config_unit_paths[] = { |
f437d5d2 | 116 | USER_CONFIG_UNIT_PATH, |
4bf2bbb6 LP |
117 | "/etc/systemd/user", |
118 | NULL | |
f437d5d2 LP |
119 | }; |
120 | ||
121 | const char * const data_unit_paths[] = { | |
122 | "/usr/local/lib/systemd/user", | |
123 | "/usr/local/share/systemd/user", | |
124 | USER_DATA_UNIT_PATH, | |
125 | "/usr/lib/systemd/user", | |
4bf2bbb6 LP |
126 | "/usr/share/systemd/user", |
127 | NULL | |
f437d5d2 LP |
128 | }; |
129 | ||
e801700e | 130 | const char *e; |
4d5dec23 | 131 | _cleanup_free_ char *config_home = NULL, *runtime_dir = NULL, *data_home = NULL; |
e3e45d4f | 132 | _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL; |
e801700e ZJS |
133 | _cleanup_free_ char **res = NULL; |
134 | char **tmp; | |
135 | int r; | |
84e3543e LP |
136 | |
137 | /* Implement the mechanisms defined in | |
138 | * | |
139 | * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html | |
140 | * | |
141 | * We look in both the config and the data dirs because we | |
142 | * want to encourage that distributors ship their unit files | |
143 | * as data, and allow overriding as configuration. | |
144 | */ | |
145 | ||
af2d49f7 | 146 | if (user_config_home(&config_home) < 0) |
e801700e | 147 | return NULL; |
84e3543e | 148 | |
4d5dec23 | 149 | if (user_runtime_dir(&runtime_dir) < 0) |
e801700e | 150 | return NULL; |
84e3543e | 151 | |
07719a21 LP |
152 | e = getenv("XDG_CONFIG_DIRS"); |
153 | if (e) { | |
154 | config_dirs = strv_split(e, ":"); | |
155 | if (!config_dirs) | |
e801700e | 156 | return NULL; |
07719a21 | 157 | } |
84e3543e | 158 | |
e801700e ZJS |
159 | r = user_data_home_dir(&data_home, "/systemd/user"); |
160 | if (r < 0) | |
161 | return NULL; | |
84e3543e | 162 | |
07719a21 LP |
163 | e = getenv("XDG_DATA_DIRS"); |
164 | if (e) | |
84e3543e LP |
165 | data_dirs = strv_split(e, ":"); |
166 | else | |
ef3102bf | 167 | data_dirs = strv_new("/usr/local/share", |
ef3102bf | 168 | "/usr/share", |
ef3102bf | 169 | NULL); |
84e3543e | 170 | if (!data_dirs) |
e801700e | 171 | return NULL; |
84e3543e LP |
172 | |
173 | /* Now merge everything we found. */ | |
e3e45d4f | 174 | if (generator_early) |
e801700e ZJS |
175 | if (strv_extend(&res, generator_early) < 0) |
176 | return NULL; | |
07719a21 | 177 | |
e3e45d4f | 178 | if (config_home) |
e801700e ZJS |
179 | if (strv_extend(&res, config_home) < 0) |
180 | return NULL; | |
84e3543e | 181 | |
aa08982d | 182 | if (!strv_isempty(config_dirs)) |
e801700e ZJS |
183 | if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0) |
184 | return NULL; | |
718880ba | 185 | |
a0f84a10 LP |
186 | if (strv_extend(&res, persistent_config) < 0) |
187 | return NULL; | |
188 | ||
e287086b | 189 | if (strv_extend_strv(&res, (char**) config_unit_paths, false) < 0) |
e801700e | 190 | return NULL; |
718880ba | 191 | |
aa08982d | 192 | if (runtime_dir) |
e801700e ZJS |
193 | if (strv_extend(&res, runtime_dir) < 0) |
194 | return NULL; | |
84e3543e | 195 | |
a0f84a10 | 196 | if (strv_extend(&res, runtime_config) < 0) |
e801700e | 197 | return NULL; |
84e3543e | 198 | |
e3e45d4f | 199 | if (generator) |
e801700e ZJS |
200 | if (strv_extend(&res, generator) < 0) |
201 | return NULL; | |
07719a21 | 202 | |
e3e45d4f | 203 | if (data_home) |
e801700e ZJS |
204 | if (strv_extend(&res, data_home) < 0) |
205 | return NULL; | |
84e3543e | 206 | |
e3e45d4f | 207 | if (!strv_isempty(data_dirs)) |
e801700e ZJS |
208 | if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0) |
209 | return NULL; | |
84e3543e | 210 | |
e287086b | 211 | if (strv_extend_strv(&res, (char**) data_unit_paths, false) < 0) |
e801700e | 212 | return NULL; |
84e3543e | 213 | |
e3e45d4f | 214 | if (generator_late) |
e801700e ZJS |
215 | if (strv_extend(&res, generator_late) < 0) |
216 | return NULL; | |
07719a21 | 217 | |
0f474365 | 218 | if (path_strv_make_absolute_cwd(res) < 0) |
e801700e | 219 | return NULL; |
84e3543e | 220 | |
e801700e ZJS |
221 | tmp = res; |
222 | res = NULL; | |
223 | return tmp; | |
224 | } | |
84e3543e | 225 | |
b2c23da8 LP |
226 | char **generator_paths(ManagerRunningAs running_as) { |
227 | if (running_as == MANAGER_USER) | |
33e1e5a7 ZJS |
228 | return strv_new("/run/systemd/user-generators", |
229 | "/etc/systemd/user-generators", | |
e801700e ZJS |
230 | "/usr/local/lib/systemd/user-generators", |
231 | USER_GENERATOR_PATH, | |
232 | NULL); | |
233 | else | |
33e1e5a7 ZJS |
234 | return strv_new("/run/systemd/system-generators", |
235 | "/etc/systemd/system-generators", | |
e801700e ZJS |
236 | "/usr/local/lib/systemd/system-generators", |
237 | SYSTEM_GENERATOR_PATH, | |
238 | NULL); | |
84e3543e LP |
239 | } |
240 | ||
a3c4eb07 LP |
241 | static int acquire_generator_dirs( |
242 | ManagerRunningAs running_as, | |
243 | char **generator, | |
244 | char **generator_early, | |
245 | char **generator_late) { | |
246 | ||
247 | _cleanup_free_ char *x = NULL, *y = NULL, *z = NULL; | |
248 | const char *prefix; | |
249 | ||
250 | assert(generator); | |
251 | assert(generator_early); | |
252 | assert(generator_late); | |
253 | ||
254 | if (running_as == MANAGER_SYSTEM) | |
255 | prefix = "/run/systemd/"; | |
256 | else { | |
257 | const char *e; | |
258 | ||
259 | assert(running_as == MANAGER_USER); | |
260 | ||
261 | e = getenv("XDG_RUNTIME_DIR"); | |
262 | if (!e) | |
263 | return -EINVAL; | |
264 | ||
265 | prefix = strjoina(e, "/systemd/", NULL); | |
266 | } | |
267 | ||
268 | x = strappend(prefix, "generator"); | |
269 | if (!x) | |
270 | return -ENOMEM; | |
271 | ||
272 | y = strappend(prefix, "generator.early"); | |
273 | if (!y) | |
274 | return -ENOMEM; | |
275 | ||
276 | z = strappend(prefix, "generator.late"); | |
277 | if (!z) | |
278 | return -ENOMEM; | |
279 | ||
280 | *generator = x; | |
281 | *generator_early = y; | |
282 | *generator_late = z; | |
283 | ||
284 | x = y = z = NULL; | |
285 | return 0; | |
286 | } | |
287 | ||
a0f84a10 LP |
288 | static int acquire_config_dirs(ManagerRunningAs running_as, bool personal, char **persistent, char **runtime) { |
289 | _cleanup_free_ char *a = NULL, *b = NULL; | |
290 | int r; | |
291 | ||
292 | assert(persistent); | |
293 | assert(runtime); | |
294 | ||
295 | if (running_as == MANAGER_SYSTEM) { | |
296 | a = strdup(SYSTEM_CONFIG_UNIT_PATH); | |
297 | b = strdup("/run/systemd/system"); | |
298 | } else if (personal) { | |
299 | assert(running_as == MANAGER_USER); | |
300 | ||
301 | r = user_config_home(&a); | |
302 | if (r < 0) | |
303 | return r; | |
304 | ||
305 | r = user_runtime_dir(runtime); | |
306 | if (r < 0) | |
307 | return r; | |
308 | ||
309 | *persistent = a; | |
310 | a = NULL; | |
311 | ||
312 | return 0; | |
313 | } else { | |
314 | assert(running_as == MANAGER_USER); | |
315 | ||
316 | a = strdup(USER_CONFIG_UNIT_PATH); | |
317 | b = strdup("/run/systemd/user"); | |
318 | } | |
319 | ||
320 | if (!a || !b) | |
321 | return -ENOMEM; | |
322 | ||
323 | *persistent = a; | |
324 | *runtime = b; | |
325 | a = b = NULL; | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
a3c4eb07 LP |
330 | static int patch_root_prefix(char **p, const char *root_dir) { |
331 | char *c; | |
332 | ||
333 | assert(p); | |
334 | ||
335 | if (!*p) | |
336 | return 0; | |
337 | ||
338 | if (isempty(root_dir) || path_equal(root_dir, "/")) | |
339 | return 0; | |
340 | ||
341 | c = prefix_root(root_dir, *p); | |
342 | if (!c) | |
343 | return -ENOMEM; | |
344 | ||
345 | free(*p); | |
346 | *p = c; | |
347 | ||
348 | return 0; | |
349 | } | |
350 | ||
07719a21 LP |
351 | int lookup_paths_init( |
352 | LookupPaths *p, | |
b2c23da8 | 353 | ManagerRunningAs running_as, |
07719a21 | 354 | bool personal, |
a3c4eb07 | 355 | const char *root_dir) { |
07719a21 | 356 | |
a0f84a10 LP |
357 | _cleanup_free_ char *generator = NULL, *generator_early = NULL, *generator_late = NULL, |
358 | *persistent_config = NULL, *runtime_config = NULL; | |
cf7d80a5 | 359 | bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */ |
a3c4eb07 LP |
360 | char **l = NULL; |
361 | const char *e; | |
0f474365 | 362 | int r; |
84e3543e LP |
363 | |
364 | assert(p); | |
a3c4eb07 LP |
365 | assert(running_as >= 0); |
366 | assert(running_as < _MANAGER_RUNNING_AS_MAX); | |
367 | ||
a0f84a10 LP |
368 | r = acquire_config_dirs(running_as, personal, &persistent_config, &runtime_config); |
369 | if (r < 0) | |
370 | return r; | |
371 | ||
a3c4eb07 LP |
372 | r = acquire_generator_dirs(running_as, &generator, &generator_early, &generator_late); |
373 | if (r < 0) | |
374 | return r; | |
84e3543e LP |
375 | |
376 | /* First priority is whatever has been passed to us via env | |
377 | * vars */ | |
07719a21 LP |
378 | e = getenv("SYSTEMD_UNIT_PATH"); |
379 | if (e) { | |
a3c4eb07 LP |
380 | const char *k; |
381 | ||
382 | k = endswith(e, ":"); | |
383 | if (k) { | |
384 | e = strndupa(e, k - e); | |
cf7d80a5 ZJS |
385 | append = true; |
386 | } | |
387 | ||
388 | /* FIXME: empty components in other places should be | |
389 | * rejected. */ | |
390 | ||
a3c4eb07 | 391 | r = path_split_and_make_absolute(e, &l); |
0f474365 LP |
392 | if (r < 0) |
393 | return r; | |
07719a21 | 394 | } else |
a3c4eb07 | 395 | l = NULL; |
84e3543e | 396 | |
a3c4eb07 | 397 | if (!l || append) { |
cf7d80a5 ZJS |
398 | /* Let's figure something out. */ |
399 | ||
a3c4eb07 | 400 | _cleanup_strv_free_ char **add = NULL; |
84e3543e | 401 | |
07719a21 | 402 | /* For the user units we include share/ in the search |
cf7d80a5 ZJS |
403 | * path in order to comply with the XDG basedir spec. |
404 | * For the system stuff we avoid such nonsense. OTOH | |
405 | * we include /lib in the search path for the system | |
406 | * stuff but avoid it for user stuff. */ | |
07719a21 | 407 | |
b2c23da8 | 408 | if (running_as == MANAGER_USER) { |
c800e483 | 409 | if (personal) |
a0f84a10 LP |
410 | add = user_dirs(persistent_config, runtime_config, |
411 | generator, generator_early, generator_late); | |
c800e483 | 412 | else |
a3c4eb07 | 413 | add = strv_new( |
07719a21 | 414 | /* If you modify this you also want to modify |
cf7d80a5 ZJS |
415 | * systemduserunitpath= in systemd.pc.in, and |
416 | * the arrays in user_dirs() above! */ | |
a3c4eb07 | 417 | generator_early, |
a0f84a10 | 418 | persistent_config, |
cf7d80a5 | 419 | "/etc/systemd/user", |
a0f84a10 | 420 | runtime_config, |
cf7d80a5 | 421 | "/run/systemd/user", |
a3c4eb07 | 422 | generator, |
cf7d80a5 ZJS |
423 | "/usr/local/lib/systemd/user", |
424 | "/usr/local/share/systemd/user", | |
425 | USER_DATA_UNIT_PATH, | |
426 | "/usr/lib/systemd/user", | |
427 | "/usr/share/systemd/user", | |
a3c4eb07 | 428 | generator_late, |
07719a21 | 429 | NULL); |
cf7d80a5 | 430 | } else |
a3c4eb07 | 431 | add = strv_new( |
cf7d80a5 ZJS |
432 | /* If you modify this you also want to modify |
433 | * systemdsystemunitpath= in systemd.pc.in! */ | |
a3c4eb07 | 434 | generator_early, |
a0f84a10 | 435 | persistent_config, |
cf7d80a5 | 436 | "/etc/systemd/system", |
a0f84a10 | 437 | runtime_config, |
cf7d80a5 | 438 | "/run/systemd/system", |
a3c4eb07 | 439 | generator, |
cf7d80a5 ZJS |
440 | "/usr/local/lib/systemd/system", |
441 | SYSTEM_DATA_UNIT_PATH, | |
442 | "/usr/lib/systemd/system", | |
443 | #ifdef HAVE_SPLIT_USR | |
444 | "/lib/systemd/system", | |
445 | #endif | |
a3c4eb07 | 446 | generator_late, |
cf7d80a5 | 447 | NULL); |
07719a21 | 448 | |
a3c4eb07 | 449 | if (!add) |
cf7d80a5 ZJS |
450 | return -ENOMEM; |
451 | ||
a3c4eb07 LP |
452 | if (l) { |
453 | r = strv_extend_strv(&l, add, false); | |
454 | if (r < 0) | |
455 | return r; | |
456 | } else { | |
457 | l = add; | |
458 | add = NULL; | |
459 | } | |
84e3543e LP |
460 | } |
461 | ||
a0f84a10 LP |
462 | r = patch_root_prefix(&persistent_config, root_dir); |
463 | if (r < 0) | |
464 | return r; | |
465 | r = patch_root_prefix(&runtime_config, root_dir); | |
466 | if (r < 0) | |
467 | return r; | |
468 | ||
a3c4eb07 LP |
469 | r = patch_root_prefix(&generator, root_dir); |
470 | if (r < 0) | |
471 | return r; | |
472 | r = patch_root_prefix(&generator_early, root_dir); | |
473 | if (r < 0) | |
474 | return r; | |
475 | r = patch_root_prefix(&generator_late, root_dir); | |
476 | if (r < 0) | |
477 | return r; | |
478 | ||
479 | if (!path_strv_resolve_uniq(l, root_dir)) | |
07719a21 | 480 | return -ENOMEM; |
07459bb6 | 481 | |
a3c4eb07 LP |
482 | if (strv_isempty(l)) { |
483 | log_debug("Ignoring unit files."); | |
484 | l = strv_free(l); | |
485 | } else { | |
486 | _cleanup_free_ char *t; | |
487 | ||
488 | t = strv_join(l, "\n\t"); | |
07719a21 | 489 | if (!t) |
07459bb6 | 490 | return -ENOMEM; |
a3c4eb07 | 491 | |
242c4e1c | 492 | log_debug("Looking for unit files in (higher priority first):\n\t%s", t); |
07459bb6 FF |
493 | } |
494 | ||
a3c4eb07 LP |
495 | p->search_path = l; |
496 | l = NULL; | |
497 | ||
a0f84a10 LP |
498 | p->persistent_config = persistent_config; |
499 | p->runtime_config = runtime_config; | |
500 | persistent_config = runtime_config = NULL; | |
501 | ||
a3c4eb07 LP |
502 | p->generator = generator; |
503 | p->generator_early = generator_early; | |
504 | p->generator_late = generator_late; | |
505 | generator = generator_early = generator_late = NULL; | |
84e3543e LP |
506 | |
507 | return 0; | |
508 | } | |
509 | ||
510 | void lookup_paths_free(LookupPaths *p) { | |
a3c4eb07 LP |
511 | if (!p) |
512 | return; | |
84e3543e | 513 | |
a3c4eb07 | 514 | p->search_path = strv_free(p->search_path); |
a0f84a10 LP |
515 | |
516 | p->persistent_config = mfree(p->persistent_config); | |
517 | p->runtime_config = mfree(p->runtime_config); | |
518 | ||
a3c4eb07 LP |
519 | p->generator = mfree(p->generator); |
520 | p->generator_early = mfree(p->generator_early); | |
521 | p->generator_late = mfree(p->generator_late); | |
84e3543e | 522 | } |
60d27f19 | 523 | |
a3c4eb07 LP |
524 | int lookup_paths_init_from_scope( |
525 | LookupPaths *p, | |
526 | UnitFileScope scope, | |
527 | const char *root_dir) { | |
528 | ||
529 | assert(p); | |
60d27f19 IS |
530 | assert(scope >= 0); |
531 | assert(scope < _UNIT_FILE_SCOPE_MAX); | |
532 | ||
a3c4eb07 LP |
533 | return lookup_paths_init( |
534 | p, | |
535 | scope == UNIT_FILE_SYSTEM ? MANAGER_SYSTEM : MANAGER_USER, | |
536 | scope == UNIT_FILE_USER, | |
537 | root_dir); | |
60d27f19 | 538 | } |