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d6c9574f | 1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
84e3543e LP |
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 | |
5430f7f2 LP |
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 | |
84e3543e LP |
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 | |
5430f7f2 | 16 | Lesser General Public License for more details. |
84e3543e | 17 | |
5430f7f2 | 18 | You should have received a copy of the GNU Lesser General Public License |
84e3543e LP |
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> | |
67445f4e | 25 | #include <string.h> |
84e3543e LP |
26 | #include <unistd.h> |
27 | #include <errno.h> | |
28 | ||
29 | #include "util.h" | |
49e942b2 | 30 | #include "mkdir.h" |
84e3543e | 31 | #include "strv.h" |
9eb977db | 32 | #include "path-util.h" |
84e3543e LP |
33 | #include "path-lookup.h" |
34 | ||
67445f4e ZJS |
35 | static const char* const systemd_running_as_table[_SYSTEMD_RUNNING_AS_MAX] = { |
36 | [SYSTEMD_SYSTEM] = "system", | |
37 | [SYSTEMD_USER] = "user" | |
38 | }; | |
39 | ||
40 | DEFINE_STRING_TABLE_LOOKUP(systemd_running_as, SystemdRunningAs); | |
41 | ||
af2d49f7 | 42 | int user_config_home(char **config_home) { |
10e87ee7 | 43 | const char *e; |
26d04f86 | 44 | char *r; |
10e87ee7 | 45 | |
07719a21 LP |
46 | e = getenv("XDG_CONFIG_HOME"); |
47 | if (e) { | |
26d04f86 LP |
48 | r = strappend(e, "/systemd/user"); |
49 | if (!r) | |
10e87ee7 LP |
50 | return -ENOMEM; |
51 | ||
26d04f86 | 52 | *config_home = r; |
10e87ee7 LP |
53 | return 1; |
54 | } else { | |
55 | const char *home; | |
56 | ||
07719a21 LP |
57 | home = getenv("HOME"); |
58 | if (home) { | |
26d04f86 LP |
59 | r = strappend(home, "/.config/systemd/user"); |
60 | if (!r) | |
10e87ee7 LP |
61 | return -ENOMEM; |
62 | ||
26d04f86 | 63 | *config_home = r; |
10e87ee7 LP |
64 | return 1; |
65 | } | |
66 | } | |
67 | ||
68 | return 0; | |
69 | } | |
70 | ||
07719a21 LP |
71 | static char** user_dirs( |
72 | const char *generator, | |
73 | const char *generator_early, | |
74 | const char *generator_late) { | |
75 | ||
f437d5d2 | 76 | const char * const config_unit_paths[] = { |
f437d5d2 | 77 | USER_CONFIG_UNIT_PATH, |
4bf2bbb6 | 78 | "/etc/systemd/user", |
fc1a2e06 | 79 | "/run/systemd/user", |
4bf2bbb6 | 80 | NULL |
f437d5d2 LP |
81 | }; |
82 | ||
83 | const char * const data_unit_paths[] = { | |
84 | "/usr/local/lib/systemd/user", | |
85 | "/usr/local/share/systemd/user", | |
86 | USER_DATA_UNIT_PATH, | |
87 | "/usr/lib/systemd/user", | |
4bf2bbb6 LP |
88 | "/usr/share/systemd/user", |
89 | NULL | |
f437d5d2 LP |
90 | }; |
91 | ||
84e3543e | 92 | const char *home, *e; |
e3e45d4f SP |
93 | _cleanup_free_ char *config_home = NULL, *data_home = NULL; |
94 | _cleanup_strv_free_ char **config_dirs = NULL, **data_dirs = NULL; | |
95 | char **r = NULL; | |
84e3543e LP |
96 | |
97 | /* Implement the mechanisms defined in | |
98 | * | |
99 | * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html | |
100 | * | |
101 | * We look in both the config and the data dirs because we | |
102 | * want to encourage that distributors ship their unit files | |
103 | * as data, and allow overriding as configuration. | |
104 | */ | |
105 | ||
af2d49f7 | 106 | if (user_config_home(&config_home) < 0) |
10e87ee7 | 107 | goto fail; |
84e3543e | 108 | |
10e87ee7 | 109 | home = getenv("HOME"); |
84e3543e | 110 | |
07719a21 LP |
111 | e = getenv("XDG_CONFIG_DIRS"); |
112 | if (e) { | |
113 | config_dirs = strv_split(e, ":"); | |
114 | if (!config_dirs) | |
84e3543e | 115 | goto fail; |
07719a21 | 116 | } |
84e3543e LP |
117 | |
118 | /* We don't treat /etc/xdg/systemd here as the spec | |
119 | * suggests because we assume that that is a link to | |
120 | * /etc/systemd/ anyway. */ | |
121 | ||
07719a21 LP |
122 | e = getenv("XDG_DATA_HOME"); |
123 | if (e) { | |
af2d49f7 | 124 | if (asprintf(&data_home, "%s/systemd/user", e) < 0) |
84e3543e LP |
125 | goto fail; |
126 | ||
127 | } else if (home) { | |
af2d49f7 | 128 | if (asprintf(&data_home, "%s/.local/share/systemd/user", home) < 0) |
84e3543e LP |
129 | goto fail; |
130 | ||
131 | /* There is really no need for two unit dirs in $HOME, | |
132 | * except to be fully compliant with the XDG spec. We | |
133 | * now try to link the two dirs, so that we can | |
134 | * minimize disk seeks a little. Further down we'll | |
135 | * then filter out this link, if it is actually is | |
136 | * one. */ | |
137 | ||
d2e54fae | 138 | mkdir_parents_label(data_home, 0777); |
af2d49f7 | 139 | (void) symlink("../../../.config/systemd/user", data_home); |
84e3543e LP |
140 | } |
141 | ||
07719a21 LP |
142 | e = getenv("XDG_DATA_DIRS"); |
143 | if (e) | |
84e3543e LP |
144 | data_dirs = strv_split(e, ":"); |
145 | else | |
ef3102bf | 146 | data_dirs = strv_new("/usr/local/share", |
ef3102bf | 147 | "/usr/share", |
ef3102bf | 148 | NULL); |
84e3543e LP |
149 | if (!data_dirs) |
150 | goto fail; | |
151 | ||
152 | /* Now merge everything we found. */ | |
e3e45d4f SP |
153 | if (generator_early) |
154 | if (strv_extend(&r, generator_early) < 0) | |
07719a21 | 155 | goto fail; |
07719a21 | 156 | |
e3e45d4f SP |
157 | if (config_home) |
158 | if (strv_extend(&r, config_home) < 0) | |
84e3543e | 159 | goto fail; |
84e3543e | 160 | |
e3e45d4f SP |
161 | if (!strv_isempty(config_dirs)) |
162 | if (strv_extend_strv_concat(&r, config_dirs, "/systemd/user") < 0) | |
163 | goto fail; | |
84e3543e | 164 | |
e3e45d4f | 165 | if (strv_extend_strv(&r, (char**) config_unit_paths) < 0) |
84e3543e | 166 | goto fail; |
84e3543e | 167 | |
e3e45d4f SP |
168 | if (generator) |
169 | if (strv_extend(&r, generator) < 0) | |
07719a21 | 170 | goto fail; |
07719a21 | 171 | |
e3e45d4f SP |
172 | if (data_home) |
173 | if (strv_extend(&r, data_home) < 0) | |
84e3543e | 174 | goto fail; |
84e3543e | 175 | |
e3e45d4f SP |
176 | if (!strv_isempty(data_dirs)) |
177 | if (strv_extend_strv_concat(&r, data_dirs, "/systemd/user") < 0) | |
f437d5d2 | 178 | goto fail; |
84e3543e | 179 | |
e3e45d4f | 180 | if (strv_extend_strv(&r, (char**) data_unit_paths) < 0) |
84e3543e | 181 | goto fail; |
84e3543e | 182 | |
e3e45d4f SP |
183 | if (generator_late) |
184 | if (strv_extend(&r, generator_late) < 0) | |
07719a21 | 185 | goto fail; |
07719a21 | 186 | |
9eb977db | 187 | if (!path_strv_make_absolute_cwd(r)) |
07719a21 | 188 | goto fail; |
84e3543e | 189 | |
84e3543e LP |
190 | return r; |
191 | ||
192 | fail: | |
193 | strv_free(r); | |
e3e45d4f | 194 | return NULL; |
84e3543e LP |
195 | } |
196 | ||
07719a21 LP |
197 | int lookup_paths_init( |
198 | LookupPaths *p, | |
67445f4e | 199 | SystemdRunningAs running_as, |
07719a21 LP |
200 | bool personal, |
201 | const char *generator, | |
202 | const char *generator_early, | |
203 | const char *generator_late) { | |
204 | ||
84e3543e | 205 | const char *e; |
84e3543e LP |
206 | |
207 | assert(p); | |
208 | ||
209 | /* First priority is whatever has been passed to us via env | |
210 | * vars */ | |
07719a21 LP |
211 | e = getenv("SYSTEMD_UNIT_PATH"); |
212 | if (e) { | |
213 | p->unit_path = path_split_and_make_absolute(e); | |
214 | if (!p->unit_path) | |
84e3543e | 215 | return -ENOMEM; |
07719a21 LP |
216 | } else |
217 | p->unit_path = NULL; | |
84e3543e LP |
218 | |
219 | if (strv_isempty(p->unit_path)) { | |
84e3543e LP |
220 | /* Nothing is set, so let's figure something out. */ |
221 | strv_free(p->unit_path); | |
222 | ||
07719a21 LP |
223 | /* For the user units we include share/ in the search |
224 | * path in order to comply with the XDG basedir | |
225 | * spec. For the system stuff we avoid such | |
226 | * nonsense. OTOH we include /lib in the search path | |
227 | * for the system stuff but avoid it for user | |
228 | * stuff. */ | |
229 | ||
67445f4e | 230 | if (running_as == SYSTEMD_USER) { |
c800e483 LP |
231 | |
232 | if (personal) | |
07719a21 | 233 | p->unit_path = user_dirs(generator, generator_early, generator_late); |
c800e483 LP |
234 | else |
235 | p->unit_path = strv_new( | |
236 | /* If you modify this you also want to modify | |
237 | * systemduserunitpath= in systemd.pc.in, and | |
238 | * the arrays in user_dirs() above! */ | |
07719a21 | 239 | STRV_IFNOTNULL(generator_early), |
c800e483 | 240 | USER_CONFIG_UNIT_PATH, |
a5afffa1 | 241 | "/etc/systemd/user", |
fc1a2e06 | 242 | "/run/systemd/user", |
07719a21 | 243 | STRV_IFNOTNULL(generator), |
c800e483 LP |
244 | "/usr/local/lib/systemd/user", |
245 | "/usr/local/share/systemd/user", | |
246 | USER_DATA_UNIT_PATH, | |
247 | "/usr/lib/systemd/user", | |
248 | "/usr/share/systemd/user", | |
07719a21 | 249 | STRV_IFNOTNULL(generator_late), |
c800e483 LP |
250 | NULL); |
251 | ||
252 | if (!p->unit_path) | |
84e3543e | 253 | return -ENOMEM; |
c800e483 | 254 | |
07719a21 LP |
255 | } else { |
256 | p->unit_path = strv_new( | |
257 | /* If you modify this you also want to modify | |
258 | * systemdsystemunitpath= in systemd.pc.in! */ | |
259 | STRV_IFNOTNULL(generator_early), | |
260 | SYSTEM_CONFIG_UNIT_PATH, | |
261 | "/etc/systemd/system", | |
262 | "/run/systemd/system", | |
263 | STRV_IFNOTNULL(generator), | |
264 | "/usr/local/lib/systemd/system", | |
265 | SYSTEM_DATA_UNIT_PATH, | |
266 | "/usr/lib/systemd/system", | |
283b73b3 | 267 | #ifdef HAVE_SPLIT_USR |
07719a21 | 268 | "/lib/systemd/system", |
283b73b3 | 269 | #endif |
07719a21 LP |
270 | STRV_IFNOTNULL(generator_late), |
271 | NULL); | |
272 | ||
273 | if (!p->unit_path) | |
84e3543e | 274 | return -ENOMEM; |
07719a21 | 275 | } |
84e3543e LP |
276 | } |
277 | ||
07719a21 LP |
278 | if (!path_strv_canonicalize(p->unit_path)) |
279 | return -ENOMEM; | |
07459bb6 FF |
280 | |
281 | strv_uniq(p->unit_path); | |
282 | ||
283 | if (!strv_isempty(p->unit_path)) { | |
7fd1b19b | 284 | _cleanup_free_ char *t = strv_join(p->unit_path, "\n\t"); |
07719a21 | 285 | if (!t) |
07459bb6 | 286 | return -ENOMEM; |
242c4e1c | 287 | log_debug("Looking for unit files in (higher priority first):\n\t%s", t); |
07459bb6 | 288 | } else { |
242c4e1c | 289 | log_debug("Ignoring unit files."); |
07459bb6 FF |
290 | strv_free(p->unit_path); |
291 | p->unit_path = NULL; | |
292 | } | |
293 | ||
67445f4e | 294 | if (running_as == SYSTEMD_SYSTEM) { |
07459bb6 | 295 | #ifdef HAVE_SYSV_COMPAT |
84e3543e LP |
296 | /* /etc/init.d/ compatibility does not matter to users */ |
297 | ||
07719a21 LP |
298 | e = getenv("SYSTEMD_SYSVINIT_PATH"); |
299 | if (e) { | |
300 | p->sysvinit_path = path_split_and_make_absolute(e); | |
301 | if (!p->sysvinit_path) | |
84e3543e | 302 | return -ENOMEM; |
07719a21 LP |
303 | } else |
304 | p->sysvinit_path = NULL; | |
84e3543e LP |
305 | |
306 | if (strv_isempty(p->sysvinit_path)) { | |
307 | strv_free(p->sysvinit_path); | |
308 | ||
07719a21 LP |
309 | p->sysvinit_path = strv_new( |
310 | SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */ | |
311 | NULL); | |
312 | if (!p->sysvinit_path) | |
84e3543e LP |
313 | return -ENOMEM; |
314 | } | |
315 | ||
07719a21 LP |
316 | e = getenv("SYSTEMD_SYSVRCND_PATH"); |
317 | if (e) { | |
318 | p->sysvrcnd_path = path_split_and_make_absolute(e); | |
319 | if (!p->sysvrcnd_path) | |
84e3543e | 320 | return -ENOMEM; |
07719a21 LP |
321 | } else |
322 | p->sysvrcnd_path = NULL; | |
84e3543e LP |
323 | |
324 | if (strv_isempty(p->sysvrcnd_path)) { | |
325 | strv_free(p->sysvrcnd_path); | |
326 | ||
07719a21 LP |
327 | p->sysvrcnd_path = strv_new( |
328 | SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */ | |
329 | NULL); | |
330 | if (!p->sysvrcnd_path) | |
84e3543e LP |
331 | return -ENOMEM; |
332 | } | |
84e3543e | 333 | |
07719a21 LP |
334 | if (!path_strv_canonicalize(p->sysvinit_path)) |
335 | return -ENOMEM; | |
84e3543e | 336 | |
07719a21 LP |
337 | if (!path_strv_canonicalize(p->sysvrcnd_path)) |
338 | return -ENOMEM; | |
84e3543e | 339 | |
07459bb6 FF |
340 | strv_uniq(p->sysvinit_path); |
341 | strv_uniq(p->sysvrcnd_path); | |
a9dd2082 | 342 | |
07459bb6 | 343 | if (!strv_isempty(p->sysvinit_path)) { |
7fd1b19b | 344 | _cleanup_free_ char *t = strv_join(p->sysvinit_path, "\n\t"); |
07719a21 | 345 | if (!t) |
07459bb6 | 346 | return -ENOMEM; |
242c4e1c | 347 | log_debug("Looking for SysV init scripts in:\n\t%s", t); |
07459bb6 | 348 | } else { |
242c4e1c | 349 | log_debug("Ignoring SysV init scripts."); |
07459bb6 FF |
350 | strv_free(p->sysvinit_path); |
351 | p->sysvinit_path = NULL; | |
352 | } | |
84e3543e | 353 | |
07459bb6 | 354 | if (!strv_isempty(p->sysvrcnd_path)) { |
7fd1b19b | 355 | _cleanup_free_ char *t = |
7ad94c71 | 356 | strv_join(p->sysvrcnd_path, "\n\t"); |
07719a21 | 357 | if (!t) |
07459bb6 | 358 | return -ENOMEM; |
84e3543e | 359 | |
07459bb6 | 360 | log_debug("Looking for SysV rcN.d links in:\n\t%s", t); |
07459bb6 FF |
361 | } else { |
362 | log_debug("Ignoring SysV rcN.d links."); | |
363 | strv_free(p->sysvrcnd_path); | |
364 | p->sysvrcnd_path = NULL; | |
365 | } | |
366 | #else | |
242c4e1c | 367 | log_debug("SysV init scripts and rcN.d links support disabled"); |
07459bb6 | 368 | #endif |
84e3543e LP |
369 | } |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | void lookup_paths_free(LookupPaths *p) { | |
375 | assert(p); | |
376 | ||
377 | strv_free(p->unit_path); | |
07459bb6 FF |
378 | p->unit_path = NULL; |
379 | ||
380 | #ifdef HAVE_SYSV_COMPAT | |
84e3543e LP |
381 | strv_free(p->sysvinit_path); |
382 | strv_free(p->sysvrcnd_path); | |
07459bb6 FF |
383 | p->sysvinit_path = p->sysvrcnd_path = NULL; |
384 | #endif | |
84e3543e | 385 | } |