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
|
/***
This file is part of systemd.
Copyright 2014 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include "alloc-util.h"
#include "conf-files.h"
#include "dirent-util.h"
#include "dropin.h"
#include "escape.h"
#include "fd-util.h"
#include "fileio-label.h"
#include "hashmap.h"
#include "log.h"
#include "macro.h"
#include "mkdir.h"
#include "path-util.h"
#include "set.h"
#include "string-util.h"
#include "strv.h"
#include "unit-name.h"
int drop_in_file(const char *dir, const char *unit, unsigned level,
const char *name, char **_p, char **_q) {
_cleanup_free_ char *b = NULL;
char *p, *q;
char prefix[DECIMAL_STR_MAX(unsigned)];
assert(unit);
assert(name);
assert(_p);
assert(_q);
sprintf(prefix, "%u", level);
b = xescape(name, "/.");
if (!b)
return -ENOMEM;
if (!filename_is_valid(b))
return -EINVAL;
p = strjoin(dir, "/", unit, ".d");
if (!p)
return -ENOMEM;
q = strjoin(p, "/", prefix, "-", b, ".conf");
if (!q) {
free(p);
return -ENOMEM;
}
*_p = p;
*_q = q;
return 0;
}
int write_drop_in(const char *dir, const char *unit, unsigned level,
const char *name, const char *data) {
_cleanup_free_ char *p = NULL, *q = NULL;
int r;
assert(dir);
assert(unit);
assert(name);
assert(data);
r = drop_in_file(dir, unit, level, name, &p, &q);
if (r < 0)
return r;
(void) mkdir_p(p, 0755);
return write_string_file_atomic_label(q, data);
}
int write_drop_in_format(const char *dir, const char *unit, unsigned level,
const char *name, const char *format, ...) {
_cleanup_free_ char *p = NULL;
va_list ap;
int r;
assert(dir);
assert(unit);
assert(name);
assert(format);
va_start(ap, format);
r = vasprintf(&p, format, ap);
va_end(ap);
if (r < 0)
return -ENOMEM;
return write_drop_in(dir, unit, level, name, p);
}
static int iterate_dir(
const char *path,
UnitDependency dependency,
dependency_consumer_t consumer,
void *arg,
char ***strv) {
_cleanup_closedir_ DIR *d = NULL;
struct dirent *de;
int r;
assert(path);
/* The config directories are special, since the order of the
* drop-ins matters */
if (dependency < 0) {
r = strv_extend(strv, path);
if (r < 0)
return log_oom();
return 0;
}
assert(consumer);
d = opendir(path);
if (!d) {
if (errno == ENOENT)
return 0;
return log_error_errno(errno, "Failed to open directory %s: %m", path);
}
FOREACH_DIRENT(de, d, return log_error_errno(errno, "Failed to read directory %s: %m", path)) {
_cleanup_free_ char *f = NULL;
f = strjoin(path, "/", de->d_name);
if (!f)
return log_oom();
r = consumer(dependency, de->d_name, f, arg);
if (r < 0)
return r;
}
return 0;
}
int unit_file_process_dir(
Set *unit_path_cache,
const char *unit_path,
const char *name,
const char *suffix,
UnitDependency dependency,
dependency_consumer_t consumer,
void *arg,
char ***strv) {
_cleanup_free_ char *path = NULL;
int r;
assert(unit_path);
assert(name);
assert(suffix);
path = strjoin(unit_path, "/", name, suffix);
if (!path)
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, path))
(void) iterate_dir(path, dependency, consumer, arg, strv);
if (unit_name_is_valid(name, UNIT_NAME_INSTANCE)) {
_cleanup_free_ char *template = NULL, *p = NULL;
/* Also try the template dir */
r = unit_name_template(name, &template);
if (r < 0)
return log_error_errno(r, "Failed to generate template from unit name: %m");
p = strjoin(unit_path, "/", template, suffix);
if (!p)
return log_oom();
if (!unit_path_cache || set_get(unit_path_cache, p))
(void) iterate_dir(p, dependency, consumer, arg, strv);
}
return 0;
}
int unit_file_find_dropin_paths(
char **lookup_path,
Set *unit_path_cache,
Set *names,
char ***paths) {
_cleanup_strv_free_ char **strv = NULL, **ans = NULL;
Iterator i;
char *t;
int r;
assert(paths);
SET_FOREACH(t, names, i) {
char **p;
STRV_FOREACH(p, lookup_path)
unit_file_process_dir(unit_path_cache, *p, t, ".d", _UNIT_DEPENDENCY_INVALID, NULL, NULL, &strv);
}
if (strv_isempty(strv))
return 0;
r = conf_files_list_strv(&ans, ".conf", NULL, (const char**) strv);
if (r < 0)
return log_warning_errno(r, "Failed to get list of configuration files: %m");
*paths = ans;
ans = NULL;
return 1;
}
|
