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663996b3 MS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | ||
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. | |
12 | ||
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. | |
17 | ||
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/>. | |
20 | ***/ | |
21 | ||
22 | #include <assert.h> | |
23 | #include <stdlib.h> | |
24 | #include <stdio.h> | |
25 | #include <string.h> | |
26 | #include <unistd.h> | |
27 | #include <errno.h> | |
28 | ||
29 | #include "util.h" | |
30 | #include "mkdir.h" | |
31 | #include "strv.h" | |
32 | #include "path-util.h" | |
33 | #include "path-lookup.h" | |
34 | ||
663996b3 MS |
35 | int user_config_home(char **config_home) { |
36 | const char *e; | |
37 | char *r; | |
38 | ||
39 | e = getenv("XDG_CONFIG_HOME"); | |
40 | if (e) { | |
41 | r = strappend(e, "/systemd/user"); | |
42 | if (!r) | |
43 | return -ENOMEM; | |
44 | ||
45 | *config_home = r; | |
46 | return 1; | |
47 | } else { | |
48 | const char *home; | |
49 | ||
50 | home = getenv("HOME"); | |
51 | if (home) { | |
52 | r = strappend(home, "/.config/systemd/user"); | |
53 | if (!r) | |
54 | return -ENOMEM; | |
55 | ||
56 | *config_home = r; | |
57 | return 1; | |
58 | } | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
5eef597e MP |
64 | int user_runtime_dir(char **runtime_dir) { |
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 | ||
74 | *runtime_dir = r; | |
75 | return 1; | |
76 | } | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
663996b3 MS |
81 | static char** user_dirs( |
82 | const char *generator, | |
83 | const char *generator_early, | |
84 | const char *generator_late) { | |
85 | ||
86 | const char * const config_unit_paths[] = { | |
87 | USER_CONFIG_UNIT_PATH, | |
88 | "/etc/systemd/user", | |
663996b3 MS |
89 | NULL |
90 | }; | |
91 | ||
5eef597e MP |
92 | const char * const runtime_unit_path = "/run/systemd/user"; |
93 | ||
663996b3 MS |
94 | const char * const data_unit_paths[] = { |
95 | "/usr/local/lib/systemd/user", | |
96 | "/usr/local/share/systemd/user", | |
97 | USER_DATA_UNIT_PATH, | |
98 | "/usr/lib/systemd/user", | |
99 | "/usr/share/systemd/user", | |
100 | NULL | |
101 | }; | |
102 | ||
103 | const char *home, *e; | |
5eef597e | 104 | _cleanup_free_ char *config_home = NULL, *runtime_dir = NULL, *data_home = NULL; |
60f067b4 JS |
105 | _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL; |
106 | char **r = NULL; | |
663996b3 MS |
107 | |
108 | /* Implement the mechanisms defined in | |
109 | * | |
110 | * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html | |
111 | * | |
112 | * We look in both the config and the data dirs because we | |
113 | * want to encourage that distributors ship their unit files | |
114 | * as data, and allow overriding as configuration. | |
115 | */ | |
116 | ||
117 | if (user_config_home(&config_home) < 0) | |
118 | goto fail; | |
119 | ||
5eef597e MP |
120 | if (user_runtime_dir(&runtime_dir) < 0) |
121 | goto fail; | |
122 | ||
663996b3 MS |
123 | home = getenv("HOME"); |
124 | ||
125 | e = getenv("XDG_CONFIG_DIRS"); | |
126 | if (e) { | |
127 | config_dirs = strv_split(e, ":"); | |
128 | if (!config_dirs) | |
129 | goto fail; | |
130 | } | |
131 | ||
132 | /* We don't treat /etc/xdg/systemd here as the spec | |
133 | * suggests because we assume that that is a link to | |
134 | * /etc/systemd/ anyway. */ | |
135 | ||
136 | e = getenv("XDG_DATA_HOME"); | |
137 | if (e) { | |
138 | if (asprintf(&data_home, "%s/systemd/user", e) < 0) | |
139 | goto fail; | |
140 | ||
141 | } else if (home) { | |
142 | if (asprintf(&data_home, "%s/.local/share/systemd/user", home) < 0) | |
143 | goto fail; | |
663996b3 MS |
144 | } |
145 | ||
146 | e = getenv("XDG_DATA_DIRS"); | |
147 | if (e) | |
148 | data_dirs = strv_split(e, ":"); | |
149 | else | |
150 | data_dirs = strv_new("/usr/local/share", | |
151 | "/usr/share", | |
152 | NULL); | |
153 | if (!data_dirs) | |
154 | goto fail; | |
155 | ||
156 | /* Now merge everything we found. */ | |
60f067b4 JS |
157 | if (generator_early) |
158 | if (strv_extend(&r, generator_early) < 0) | |
663996b3 | 159 | goto fail; |
663996b3 | 160 | |
60f067b4 JS |
161 | if (config_home) |
162 | if (strv_extend(&r, config_home) < 0) | |
663996b3 | 163 | goto fail; |
663996b3 | 164 | |
60f067b4 JS |
165 | if (!strv_isempty(config_dirs)) |
166 | if (strv_extend_strv_concat(&r, config_dirs, "/systemd/user") < 0) | |
167 | goto fail; | |
663996b3 | 168 | |
60f067b4 | 169 | if (strv_extend_strv(&r, (char**) config_unit_paths) < 0) |
663996b3 | 170 | goto fail; |
663996b3 | 171 | |
5eef597e MP |
172 | if (runtime_dir) |
173 | if (strv_extend(&r, runtime_dir) < 0) | |
174 | goto fail; | |
175 | ||
176 | if (strv_extend(&r, runtime_unit_path) < 0) | |
177 | goto fail; | |
178 | ||
60f067b4 JS |
179 | if (generator) |
180 | if (strv_extend(&r, generator) < 0) | |
663996b3 | 181 | goto fail; |
663996b3 | 182 | |
60f067b4 JS |
183 | if (data_home) |
184 | if (strv_extend(&r, data_home) < 0) | |
663996b3 | 185 | goto fail; |
663996b3 | 186 | |
60f067b4 JS |
187 | if (!strv_isempty(data_dirs)) |
188 | if (strv_extend_strv_concat(&r, data_dirs, "/systemd/user") < 0) | |
663996b3 | 189 | goto fail; |
663996b3 | 190 | |
60f067b4 | 191 | if (strv_extend_strv(&r, (char**) data_unit_paths) < 0) |
663996b3 | 192 | goto fail; |
663996b3 | 193 | |
60f067b4 JS |
194 | if (generator_late) |
195 | if (strv_extend(&r, generator_late) < 0) | |
663996b3 | 196 | goto fail; |
663996b3 MS |
197 | |
198 | if (!path_strv_make_absolute_cwd(r)) | |
199 | goto fail; | |
200 | ||
663996b3 MS |
201 | return r; |
202 | ||
203 | fail: | |
204 | strv_free(r); | |
60f067b4 | 205 | return NULL; |
663996b3 MS |
206 | } |
207 | ||
208 | int lookup_paths_init( | |
209 | LookupPaths *p, | |
210 | SystemdRunningAs running_as, | |
211 | bool personal, | |
60f067b4 | 212 | const char *root_dir, |
663996b3 MS |
213 | const char *generator, |
214 | const char *generator_early, | |
215 | const char *generator_late) { | |
216 | ||
217 | const char *e; | |
5eef597e | 218 | bool append = false; /* Add items from SYSTEMD_UNIT_PATH before normal directories */ |
663996b3 MS |
219 | |
220 | assert(p); | |
221 | ||
222 | /* First priority is whatever has been passed to us via env | |
223 | * vars */ | |
224 | e = getenv("SYSTEMD_UNIT_PATH"); | |
225 | if (e) { | |
5eef597e MP |
226 | if (endswith(e, ":")) { |
227 | e = strndupa(e, strlen(e) - 1); | |
228 | append = true; | |
229 | } | |
230 | ||
231 | /* FIXME: empty components in other places should be | |
232 | * rejected. */ | |
233 | ||
663996b3 MS |
234 | p->unit_path = path_split_and_make_absolute(e); |
235 | if (!p->unit_path) | |
236 | return -ENOMEM; | |
237 | } else | |
238 | p->unit_path = NULL; | |
239 | ||
5eef597e MP |
240 | if (!p->unit_path || append) { |
241 | /* Let's figure something out. */ | |
242 | ||
243 | _cleanup_strv_free_ char **unit_path; | |
244 | int r; | |
663996b3 MS |
245 | |
246 | /* For the user units we include share/ in the search | |
5eef597e MP |
247 | * path in order to comply with the XDG basedir spec. |
248 | * For the system stuff we avoid such nonsense. OTOH | |
249 | * we include /lib in the search path for the system | |
250 | * stuff but avoid it for user stuff. */ | |
663996b3 MS |
251 | |
252 | if (running_as == SYSTEMD_USER) { | |
663996b3 | 253 | if (personal) |
5eef597e | 254 | unit_path = user_dirs(generator, generator_early, generator_late); |
663996b3 | 255 | else |
5eef597e | 256 | unit_path = strv_new( |
663996b3 | 257 | /* If you modify this you also want to modify |
5eef597e MP |
258 | * systemduserunitpath= in systemd.pc.in, and |
259 | * the arrays in user_dirs() above! */ | |
663996b3 | 260 | STRV_IFNOTNULL(generator_early), |
5eef597e MP |
261 | USER_CONFIG_UNIT_PATH, |
262 | "/etc/systemd/user", | |
263 | "/run/systemd/user", | |
663996b3 | 264 | STRV_IFNOTNULL(generator), |
5eef597e MP |
265 | "/usr/local/lib/systemd/user", |
266 | "/usr/local/share/systemd/user", | |
267 | USER_DATA_UNIT_PATH, | |
268 | "/usr/lib/systemd/user", | |
269 | "/usr/share/systemd/user", | |
663996b3 MS |
270 | STRV_IFNOTNULL(generator_late), |
271 | NULL); | |
5eef597e MP |
272 | } else |
273 | unit_path = strv_new( | |
274 | /* If you modify this you also want to modify | |
275 | * systemdsystemunitpath= in systemd.pc.in! */ | |
276 | STRV_IFNOTNULL(generator_early), | |
277 | SYSTEM_CONFIG_UNIT_PATH, | |
278 | "/etc/systemd/system", | |
279 | "/run/systemd/system", | |
280 | STRV_IFNOTNULL(generator), | |
281 | "/usr/local/lib/systemd/system", | |
282 | SYSTEM_DATA_UNIT_PATH, | |
283 | "/usr/lib/systemd/system", | |
284 | #ifdef HAVE_SPLIT_USR | |
285 | "/lib/systemd/system", | |
286 | #endif | |
287 | STRV_IFNOTNULL(generator_late), | |
288 | NULL); | |
663996b3 | 289 | |
5eef597e MP |
290 | if (!unit_path) |
291 | return -ENOMEM; | |
292 | ||
293 | r = strv_extend_strv(&p->unit_path, unit_path); | |
294 | if (r < 0) | |
295 | return r; | |
663996b3 MS |
296 | } |
297 | ||
e842803a | 298 | if (!path_strv_resolve_uniq(p->unit_path, root_dir)) |
663996b3 MS |
299 | return -ENOMEM; |
300 | ||
663996b3 MS |
301 | if (!strv_isempty(p->unit_path)) { |
302 | _cleanup_free_ char *t = strv_join(p->unit_path, "\n\t"); | |
303 | if (!t) | |
304 | return -ENOMEM; | |
305 | log_debug("Looking for unit files in (higher priority first):\n\t%s", t); | |
306 | } else { | |
307 | log_debug("Ignoring unit files."); | |
308 | strv_free(p->unit_path); | |
309 | p->unit_path = NULL; | |
310 | } | |
311 | ||
312 | if (running_as == SYSTEMD_SYSTEM) { | |
313 | #ifdef HAVE_SYSV_COMPAT | |
314 | /* /etc/init.d/ compatibility does not matter to users */ | |
315 | ||
316 | e = getenv("SYSTEMD_SYSVINIT_PATH"); | |
317 | if (e) { | |
318 | p->sysvinit_path = path_split_and_make_absolute(e); | |
319 | if (!p->sysvinit_path) | |
320 | return -ENOMEM; | |
321 | } else | |
322 | p->sysvinit_path = NULL; | |
323 | ||
324 | if (strv_isempty(p->sysvinit_path)) { | |
325 | strv_free(p->sysvinit_path); | |
326 | ||
327 | p->sysvinit_path = strv_new( | |
328 | SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */ | |
329 | NULL); | |
330 | if (!p->sysvinit_path) | |
331 | return -ENOMEM; | |
332 | } | |
333 | ||
334 | e = getenv("SYSTEMD_SYSVRCND_PATH"); | |
335 | if (e) { | |
336 | p->sysvrcnd_path = path_split_and_make_absolute(e); | |
337 | if (!p->sysvrcnd_path) | |
338 | return -ENOMEM; | |
339 | } else | |
340 | p->sysvrcnd_path = NULL; | |
341 | ||
342 | if (strv_isempty(p->sysvrcnd_path)) { | |
343 | strv_free(p->sysvrcnd_path); | |
344 | ||
345 | p->sysvrcnd_path = strv_new( | |
346 | SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */ | |
347 | NULL); | |
348 | if (!p->sysvrcnd_path) | |
349 | return -ENOMEM; | |
350 | } | |
351 | ||
e842803a | 352 | if (!path_strv_resolve_uniq(p->sysvinit_path, root_dir)) |
663996b3 MS |
353 | return -ENOMEM; |
354 | ||
e842803a | 355 | if (!path_strv_resolve_uniq(p->sysvrcnd_path, root_dir)) |
663996b3 MS |
356 | return -ENOMEM; |
357 | ||
663996b3 MS |
358 | if (!strv_isempty(p->sysvinit_path)) { |
359 | _cleanup_free_ char *t = strv_join(p->sysvinit_path, "\n\t"); | |
360 | if (!t) | |
361 | return -ENOMEM; | |
362 | log_debug("Looking for SysV init scripts in:\n\t%s", t); | |
363 | } else { | |
364 | log_debug("Ignoring SysV init scripts."); | |
365 | strv_free(p->sysvinit_path); | |
366 | p->sysvinit_path = NULL; | |
367 | } | |
368 | ||
369 | if (!strv_isempty(p->sysvrcnd_path)) { | |
370 | _cleanup_free_ char *t = | |
371 | strv_join(p->sysvrcnd_path, "\n\t"); | |
372 | if (!t) | |
373 | return -ENOMEM; | |
374 | ||
375 | log_debug("Looking for SysV rcN.d links in:\n\t%s", t); | |
376 | } else { | |
377 | log_debug("Ignoring SysV rcN.d links."); | |
378 | strv_free(p->sysvrcnd_path); | |
379 | p->sysvrcnd_path = NULL; | |
380 | } | |
381 | #else | |
382 | log_debug("SysV init scripts and rcN.d links support disabled"); | |
383 | #endif | |
384 | } | |
385 | ||
386 | return 0; | |
387 | } | |
388 | ||
389 | void lookup_paths_free(LookupPaths *p) { | |
390 | assert(p); | |
391 | ||
392 | strv_free(p->unit_path); | |
393 | p->unit_path = NULL; | |
394 | ||
395 | #ifdef HAVE_SYSV_COMPAT | |
396 | strv_free(p->sysvinit_path); | |
397 | strv_free(p->sysvrcnd_path); | |
398 | p->sysvinit_path = p->sysvrcnd_path = NULL; | |
399 | #endif | |
400 | } |