1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
|
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include "util.h"
#include "strv.h"
#include "path-lookup.h"
int user_config_home(char **config_home) {
const char *e;
if ((e = getenv("XDG_CONFIG_HOME"))) {
if (asprintf(config_home, "%s/systemd/user", e) < 0)
return -ENOMEM;
return 1;
} else {
const char *home;
if ((home = getenv("HOME"))) {
if (asprintf(config_home, "%s/.config/systemd/user", home) < 0)
return -ENOMEM;
return 1;
}
}
return 0;
}
static char** user_dirs(void) {
const char *home, *e;
char *config_home = NULL, *data_home = NULL;
char **config_dirs = NULL, **data_dirs = NULL;
char **r = NULL, **t;
/* Implement the mechanisms defined in
*
* http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
*
* We look in both the config and the data dirs because we
* want to encourage that distributors ship their unit files
* as data, and allow overriding as configuration.
*/
if (user_config_home(&config_home) < 0)
goto fail;
home = getenv("HOME");
if ((e = getenv("XDG_CONFIG_DIRS")))
if (!(config_dirs = strv_split(e, ":")))
goto fail;
/* We don't treat /etc/xdg/systemd here as the spec
* suggests because we assume that that is a link to
* /etc/systemd/ anyway. */
if ((e = getenv("XDG_DATA_HOME"))) {
if (asprintf(&data_home, "%s/systemd/user", e) < 0)
goto fail;
} else if (home) {
if (asprintf(&data_home, "%s/.local/share/systemd/user", home) < 0)
goto fail;
/* There is really no need for two unit dirs in $HOME,
* except to be fully compliant with the XDG spec. We
* now try to link the two dirs, so that we can
* minimize disk seeks a little. Further down we'll
* then filter out this link, if it is actually is
* one. */
mkdir_parents(data_home, 0777);
(void) symlink("../../../.config/systemd/user", data_home);
}
if ((e = getenv("XDG_DATA_DIRS")))
data_dirs = strv_split(e, ":");
else
data_dirs = strv_new("/usr/local/share",
"/usr/local/lib",
"/usr/share",
"/usr/lib",
NULL);
if (!data_dirs)
goto fail;
/* Now merge everything we found. */
if (config_home) {
if (!(t = strv_append(r, config_home)))
goto fail;
strv_free(r);
r = t;
}
if (!(t = strv_merge_concat(r, config_dirs, "/systemd/user")))
goto finish;
strv_free(r);
r = t;
if (!(t = strv_append(r, USER_CONFIG_UNIT_PATH)))
goto fail;
strv_free(r);
r = t;
if (data_home) {
if (!(t = strv_append(r, data_home)))
goto fail;
strv_free(r);
r = t;
}
if (!(t = strv_merge_concat(r, data_dirs, "/systemd/user")))
goto fail;
strv_free(r);
r = t;
if (!(t = strv_append(r, USER_DATA_UNIT_PATH)))
goto fail;
strv_free(r);
r = t;
if (!strv_path_make_absolute_cwd(r))
goto fail;
finish:
free(config_home);
strv_free(config_dirs);
free(data_home);
strv_free(data_dirs);
return r;
fail:
strv_free(r);
r = NULL;
goto finish;
}
int lookup_paths_init(LookupPaths *p, ManagerRunningAs running_as) {
const char *e;
char *t;
assert(p);
/* First priority is whatever has been passed to us via env
* vars */
if ((e = getenv("SYSTEMD_UNIT_PATH")))
if (!(p->unit_path = split_path_and_make_absolute(e)))
return -ENOMEM;
if (strv_isempty(p->unit_path)) {
/* Nothing is set, so let's figure something out. */
strv_free(p->unit_path);
if (running_as == MANAGER_USER) {
if (!(p->unit_path = user_dirs()))
return -ENOMEM;
} else
if (!(p->unit_path = strv_new(
/* If you modify this you also want to modify
* systemdsystemunitpath= in systemd.pc.in! */
"/run/systemd/system",
SYSTEM_CONFIG_UNIT_PATH,
"/etc/systemd/system",
"/usr/local/share/systemd/system",
"/usr/local/lib/systemd/system",
"/usr/share/systemd/system",
"/usr/lib/systemd/system",
SYSTEM_DATA_UNIT_PATH,
"/lib/systemd/system",
NULL)))
return -ENOMEM;
}
if (p->unit_path)
if (!strv_path_canonicalize(p->unit_path))
return -ENOMEM;
strv_uniq(p->unit_path);
if (!strv_isempty(p->unit_path)) {
if (!(t = strv_join(p->unit_path, "\n\t")))
return -ENOMEM;
log_debug("Looking for unit files in:\n\t%s", t);
free(t);
} else {
log_debug("Ignoring unit files.");
strv_free(p->unit_path);
p->unit_path = NULL;
}
if (running_as == MANAGER_SYSTEM) {
#ifdef HAVE_SYSV_COMPAT
/* /etc/init.d/ compatibility does not matter to users */
if ((e = getenv("SYSTEMD_SYSVINIT_PATH")))
if (!(p->sysvinit_path = split_path_and_make_absolute(e)))
return -ENOMEM;
if (strv_isempty(p->sysvinit_path)) {
strv_free(p->sysvinit_path);
if (!(p->sysvinit_path = strv_new(
SYSTEM_SYSVINIT_PATH, /* /etc/init.d/ */
NULL)))
return -ENOMEM;
}
if ((e = getenv("SYSTEMD_SYSVRCND_PATH")))
if (!(p->sysvrcnd_path = split_path_and_make_absolute(e)))
return -ENOMEM;
if (strv_isempty(p->sysvrcnd_path)) {
strv_free(p->sysvrcnd_path);
if (!(p->sysvrcnd_path = strv_new(
SYSTEM_SYSVRCND_PATH, /* /etc/rcN.d/ */
NULL)))
return -ENOMEM;
}
if (p->sysvinit_path)
if (!strv_path_canonicalize(p->sysvinit_path))
return -ENOMEM;
if (p->sysvrcnd_path)
if (!strv_path_canonicalize(p->sysvrcnd_path))
return -ENOMEM;
strv_uniq(p->sysvinit_path);
strv_uniq(p->sysvrcnd_path);
if (!strv_isempty(p->sysvinit_path)) {
if (!(t = strv_join(p->sysvinit_path, "\n\t")))
return -ENOMEM;
log_debug("Looking for SysV init scripts in:\n\t%s", t);
free(t);
} else {
log_debug("Ignoring SysV init scripts.");
strv_free(p->sysvinit_path);
p->sysvinit_path = NULL;
}
if (!strv_isempty(p->sysvrcnd_path)) {
if (!(t = strv_join(p->sysvrcnd_path, "\n\t")))
return -ENOMEM;
log_debug("Looking for SysV rcN.d links in:\n\t%s", t);
free(t);
} else {
log_debug("Ignoring SysV rcN.d links.");
strv_free(p->sysvrcnd_path);
p->sysvrcnd_path = NULL;
}
#else
log_debug("Disabled SysV init scripts and rcN.d links support");
#endif
}
return 0;
}
void lookup_paths_free(LookupPaths *p) {
assert(p);
strv_free(p->unit_path);
p->unit_path = NULL;
#ifdef HAVE_SYSV_COMPAT
strv_free(p->sysvinit_path);
strv_free(p->sysvrcnd_path);
p->sysvinit_path = p->sysvrcnd_path = NULL;
#endif
}
|
