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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 | |
9 | under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 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 | General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU 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 <unistd.h> | |
26 | #include <errno.h> | |
27 | ||
28 | #include "util.h" | |
29 | #include "strv.h" | |
30 | ||
31 | #include "path-lookup.h" | |
32 | ||
af2d49f7 | 33 | int user_config_home(char **config_home) { |
10e87ee7 LP |
34 | const char *e; |
35 | ||
36 | if ((e = getenv("XDG_CONFIG_HOME"))) { | |
af2d49f7 | 37 | if (asprintf(config_home, "%s/systemd/user", e) < 0) |
10e87ee7 LP |
38 | return -ENOMEM; |
39 | ||
40 | return 1; | |
41 | } else { | |
42 | const char *home; | |
43 | ||
44 | if ((home = getenv("HOME"))) { | |
af2d49f7 | 45 | if (asprintf(config_home, "%s/.config/systemd/user", home) < 0) |
10e87ee7 LP |
46 | return -ENOMEM; |
47 | ||
48 | return 1; | |
49 | } | |
50 | } | |
51 | ||
52 | return 0; | |
53 | } | |
54 | ||
af2d49f7 | 55 | static char** user_dirs(void) { |
84e3543e LP |
56 | const char *home, *e; |
57 | char *config_home = NULL, *data_home = NULL; | |
58 | char **config_dirs = NULL, **data_dirs = NULL; | |
59 | char **r = NULL, **t; | |
60 | ||
61 | /* Implement the mechanisms defined in | |
62 | * | |
63 | * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html | |
64 | * | |
65 | * We look in both the config and the data dirs because we | |
66 | * want to encourage that distributors ship their unit files | |
67 | * as data, and allow overriding as configuration. | |
68 | */ | |
69 | ||
af2d49f7 | 70 | if (user_config_home(&config_home) < 0) |
10e87ee7 | 71 | goto fail; |
84e3543e | 72 | |
10e87ee7 | 73 | home = getenv("HOME"); |
84e3543e LP |
74 | |
75 | if ((e = getenv("XDG_CONFIG_DIRS"))) | |
76 | if (!(config_dirs = strv_split(e, ":"))) | |
77 | goto fail; | |
78 | ||
79 | /* We don't treat /etc/xdg/systemd here as the spec | |
80 | * suggests because we assume that that is a link to | |
81 | * /etc/systemd/ anyway. */ | |
82 | ||
83 | if ((e = getenv("XDG_DATA_HOME"))) { | |
af2d49f7 | 84 | if (asprintf(&data_home, "%s/systemd/user", e) < 0) |
84e3543e LP |
85 | goto fail; |
86 | ||
87 | } else if (home) { | |
af2d49f7 | 88 | if (asprintf(&data_home, "%s/.local/share/systemd/user", home) < 0) |
84e3543e LP |
89 | goto fail; |
90 | ||
91 | /* There is really no need for two unit dirs in $HOME, | |
92 | * except to be fully compliant with the XDG spec. We | |
93 | * now try to link the two dirs, so that we can | |
94 | * minimize disk seeks a little. Further down we'll | |
95 | * then filter out this link, if it is actually is | |
96 | * one. */ | |
97 | ||
98 | mkdir_parents(data_home, 0777); | |
af2d49f7 | 99 | (void) symlink("../../../.config/systemd/user", data_home); |
84e3543e LP |
100 | } |
101 | ||
102 | if ((e = getenv("XDG_DATA_DIRS"))) | |
103 | data_dirs = strv_split(e, ":"); | |
104 | else | |
105 | data_dirs = strv_new("/usr/local/share", "/usr/share", NULL); | |
106 | ||
107 | if (!data_dirs) | |
108 | goto fail; | |
109 | ||
110 | /* Now merge everything we found. */ | |
111 | if (config_home) { | |
112 | if (!(t = strv_append(r, config_home))) | |
113 | goto fail; | |
114 | strv_free(r); | |
115 | r = t; | |
116 | } | |
117 | ||
af2d49f7 | 118 | if (!(t = strv_merge_concat(r, config_dirs, "/systemd/user"))) |
84e3543e LP |
119 | goto finish; |
120 | strv_free(r); | |
121 | r = t; | |
122 | ||
af2d49f7 | 123 | if (!(t = strv_append(r, USER_CONFIG_UNIT_PATH))) |
84e3543e LP |
124 | goto fail; |
125 | strv_free(r); | |
126 | r = t; | |
127 | ||
128 | if (data_home) { | |
129 | if (!(t = strv_append(r, data_home))) | |
130 | goto fail; | |
131 | strv_free(r); | |
132 | r = t; | |
133 | } | |
134 | ||
af2d49f7 | 135 | if (!(t = strv_merge_concat(r, data_dirs, "/systemd/user"))) |
84e3543e LP |
136 | goto fail; |
137 | strv_free(r); | |
138 | r = t; | |
139 | ||
af2d49f7 | 140 | if (!(t = strv_append(r, USER_DATA_UNIT_PATH))) |
84e3543e LP |
141 | goto fail; |
142 | strv_free(r); | |
143 | r = t; | |
144 | ||
145 | if (!strv_path_make_absolute_cwd(r)) | |
146 | goto fail; | |
147 | ||
148 | finish: | |
149 | free(config_home); | |
150 | strv_free(config_dirs); | |
151 | free(data_home); | |
152 | strv_free(data_dirs); | |
153 | ||
154 | return r; | |
155 | ||
156 | fail: | |
157 | strv_free(r); | |
158 | r = NULL; | |
159 | goto finish; | |
160 | } | |
161 | ||
162 | int lookup_paths_init(LookupPaths *p, ManagerRunningAs running_as) { | |
163 | const char *e; | |
164 | char *t; | |
165 | ||
166 | assert(p); | |
167 | ||
168 | /* First priority is whatever has been passed to us via env | |
169 | * vars */ | |
170 | if ((e = getenv("SYSTEMD_UNIT_PATH"))) | |
171 | if (!(p->unit_path = split_path_and_make_absolute(e))) | |
172 | return -ENOMEM; | |
173 | ||
174 | if (strv_isempty(p->unit_path)) { | |
175 | ||
176 | /* Nothing is set, so let's figure something out. */ | |
177 | strv_free(p->unit_path); | |
178 | ||
af2d49f7 LP |
179 | if (running_as == MANAGER_USER) { |
180 | if (!(p->unit_path = user_dirs())) | |
84e3543e LP |
181 | return -ENOMEM; |
182 | } else | |
183 | if (!(p->unit_path = strv_new( | |
37072578 | 184 | "/dev/.systemd/system", |
c0115b1f LP |
185 | SYSTEM_CONFIG_UNIT_PATH, |
186 | "/etc/systemd/system", | |
bf9a6e8b LP |
187 | "/usr/local/share/systemd/system", |
188 | "/usr/share/systemd/system", | |
c0115b1f LP |
189 | "/lib/systemd/system", |
190 | SYSTEM_DATA_UNIT_PATH, | |
84e3543e LP |
191 | NULL))) |
192 | return -ENOMEM; | |
193 | } | |
194 | ||
07459bb6 FF |
195 | if (p->unit_path) |
196 | if (!strv_path_canonicalize(p->unit_path)) | |
197 | return -ENOMEM; | |
198 | ||
199 | strv_uniq(p->unit_path); | |
200 | ||
201 | if (!strv_isempty(p->unit_path)) { | |
202 | ||
203 | if (!(t = strv_join(p->unit_path, "\n\t"))) | |
204 | return -ENOMEM; | |
205 | log_debug("Looking for unit files in:\n\t%s", t); | |
206 | free(t); | |
207 | } else { | |
208 | log_debug("Ignoring unit files."); | |
209 | strv_free(p->unit_path); | |
210 | p->unit_path = NULL; | |
211 | } | |
212 | ||
a3d4e06d | 213 | if (running_as == MANAGER_SYSTEM) { |
07459bb6 | 214 | #ifdef HAVE_SYSV_COMPAT |
84e3543e LP |
215 | /* /etc/init.d/ compatibility does not matter to users */ |
216 | ||
217 | if ((e = getenv("SYSTEMD_SYSVINIT_PATH"))) | |
218 | if (!(p->sysvinit_path = split_path_and_make_absolute(e))) | |
219 | return -ENOMEM; | |
220 | ||
221 | if (strv_isempty(p->sysvinit_path)) { | |
222 | strv_free(p->sysvinit_path); | |
223 | ||
224 | if (!(p->sysvinit_path = strv_new( | |
225 | SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */ | |
226 | NULL))) | |
227 | return -ENOMEM; | |
228 | } | |
229 | ||
230 | if ((e = getenv("SYSTEMD_SYSVRCND_PATH"))) | |
231 | if (!(p->sysvrcnd_path = split_path_and_make_absolute(e))) | |
232 | return -ENOMEM; | |
233 | ||
234 | if (strv_isempty(p->sysvrcnd_path)) { | |
235 | strv_free(p->sysvrcnd_path); | |
236 | ||
237 | if (!(p->sysvrcnd_path = strv_new( | |
238 | SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */ | |
239 | NULL))) | |
240 | return -ENOMEM; | |
241 | } | |
84e3543e | 242 | |
07459bb6 FF |
243 | if (p->sysvinit_path) |
244 | if (!strv_path_canonicalize(p->sysvinit_path)) | |
245 | return -ENOMEM; | |
84e3543e | 246 | |
07459bb6 FF |
247 | if (p->sysvrcnd_path) |
248 | if (!strv_path_canonicalize(p->sysvrcnd_path)) | |
249 | return -ENOMEM; | |
84e3543e | 250 | |
07459bb6 FF |
251 | strv_uniq(p->sysvinit_path); |
252 | strv_uniq(p->sysvrcnd_path); | |
84e3543e | 253 | |
07459bb6 | 254 | if (!strv_isempty(p->sysvinit_path)) { |
84e3543e | 255 | |
07459bb6 FF |
256 | if (!(t = strv_join(p->sysvinit_path, "\n\t"))) |
257 | return -ENOMEM; | |
84e3543e | 258 | |
07459bb6 FF |
259 | log_debug("Looking for SysV init scripts in:\n\t%s", t); |
260 | free(t); | |
261 | } else { | |
262 | log_debug("Ignoring SysV init scripts."); | |
263 | strv_free(p->sysvinit_path); | |
264 | p->sysvinit_path = NULL; | |
265 | } | |
84e3543e | 266 | |
07459bb6 | 267 | if (!strv_isempty(p->sysvrcnd_path)) { |
84e3543e | 268 | |
07459bb6 FF |
269 | if (!(t = strv_join(p->sysvrcnd_path, "\n\t"))) |
270 | return -ENOMEM; | |
84e3543e | 271 | |
07459bb6 FF |
272 | log_debug("Looking for SysV rcN.d links in:\n\t%s", t); |
273 | free(t); | |
274 | } else { | |
275 | log_debug("Ignoring SysV rcN.d links."); | |
276 | strv_free(p->sysvrcnd_path); | |
277 | p->sysvrcnd_path = NULL; | |
278 | } | |
279 | #else | |
280 | log_debug("Disabled SysV init scripts and rcN.d links support"); | |
281 | #endif | |
84e3543e LP |
282 | } |
283 | ||
284 | return 0; | |
285 | } | |
286 | ||
287 | void lookup_paths_free(LookupPaths *p) { | |
288 | assert(p); | |
289 | ||
290 | strv_free(p->unit_path); | |
07459bb6 FF |
291 | p->unit_path = NULL; |
292 | ||
293 | #ifdef HAVE_SYSV_COMPAT | |
84e3543e LP |
294 | strv_free(p->sysvinit_path); |
295 | strv_free(p->sysvrcnd_path); | |
07459bb6 FF |
296 | p->sysvinit_path = p->sysvrcnd_path = NULL; |
297 | #endif | |
84e3543e | 298 | } |