Bug Summary

File:build-scan/../src/shared/path-lookup.c
Warning:line 362, column 25
Potential leak of memory pointed to by 'a'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name path-lookup.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -menable-no-infs -menable-no-nans -menable-unsafe-fp-math -fno-signed-zeros -mreassociate -freciprocal-math -fdenormal-fp-math=preserve-sign,preserve-sign -ffp-contract=fast -fno-rounding-math -ffast-math -ffinite-math-only -mconstructor-aliases -munwind-tables -target-cpu x86-64 -tune-cpu generic -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/12.0.0 -include config.h -I src/shared/libsystemd-shared-239.a.p -I src/shared -I ../src/shared -I src/basic -I ../src/basic -I src/systemd -I ../src/systemd -I src/journal -I ../src/journal -I src/journal-remote -I ../src/journal-remote -I src/nspawn -I ../src/nspawn -I src/resolve -I ../src/resolve -I src/timesync -I ../src/timesync -I ../src/time-wait-sync -I src/login -I ../src/login -I src/udev -I ../src/udev -I src/libudev -I ../src/libudev -I src/core -I ../src/core -I ../src/libsystemd/sd-bus -I ../src/libsystemd/sd-device -I ../src/libsystemd/sd-hwdb -I ../src/libsystemd/sd-id128 -I ../src/libsystemd/sd-netlink -I ../src/libsystemd/sd-network -I src/libsystemd-network -I ../src/libsystemd-network -I . -I .. -I /usr/include/blkid -D _FILE_OFFSET_BITS=64 -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/12.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -Wwrite-strings -Wno-unused-parameter -Wno-missing-field-initializers -Wno-unused-result -Wno-format-signedness -Wno-error=nonnull -std=gnu99 -fconst-strings -fdebug-compilation-dir /home/mrc0mmand/repos/@redhat-plumbers/systemd-rhel8/build-scan -ferror-limit 19 -fvisibility default -stack-protector 2 -fgnuc-version=4.2.1 -fcolor-diagnostics -analyzer-output=html -faddrsig -o /tmp/scan-build-2021-07-16-221226-1465241-1 -x c ../src/shared/path-lookup.c
1/* SPDX-License-Identifier: LGPL-2.1+ */
2
3#include <errno(*__errno_location ()).h>
4#include <stdio.h>
5#include <stdlib.h>
6#include <string.h>
7
8#include "alloc-util.h"
9#include "fileio.h"
10#include "fs-util.h"
11#include "install.h"
12#include "log.h"
13#include "macro.h"
14#include "mkdir.h"
15#include "path-lookup.h"
16#include "path-util.h"
17#include "rm-rf.h"
18#include "stat-util.h"
19#include "string-util.h"
20#include "strv.h"
21#include "user-util.h"
22#include "util.h"
23
24int xdg_user_runtime_dir(char **ret, const char *suffix) {
25 const char *e;
26 char *j;
27
28 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/shared/path-lookup.c", 28
, __PRETTY_FUNCTION__); } while (0);
29 assert(suffix)do { if ((__builtin_expect(!!(!(suffix)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("suffix"), "../src/shared/path-lookup.c"
, 29, __PRETTY_FUNCTION__); } while (0);
30
31 e = getenv("XDG_RUNTIME_DIR");
32 if (!e)
33 return -ENXIO6;
34
35 j = strappend(e, suffix);
36 if (!j)
37 return -ENOMEM12;
38
39 *ret = j;
40 return 0;
41}
42
43int xdg_user_config_dir(char **ret, const char *suffix) {
44 const char *e;
45 char *j;
46 int r;
47
48 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/shared/path-lookup.c", 48
, __PRETTY_FUNCTION__); } while (0);
49
50 e = getenv("XDG_CONFIG_HOME");
51 if (e)
52 j = strappend(e, suffix);
53 else {
54 _cleanup_free___attribute__((cleanup(freep))) char *home = NULL((void*)0);
55
56 r = get_home_dir(&home);
57 if (r < 0)
58 return r;
59
60 j = strjoin(home, "/.config", suffix)strjoin_real((home), "/.config", suffix, ((void*)0));
61 }
62
63 if (!j)
64 return -ENOMEM12;
65
66 *ret = j;
67 return 0;
68}
69
70int xdg_user_data_dir(char **ret, const char *suffix) {
71 const char *e;
72 char *j;
73 int r;
74
75 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/shared/path-lookup.c", 75
, __PRETTY_FUNCTION__); } while (0);
76 assert(suffix)do { if ((__builtin_expect(!!(!(suffix)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("suffix"), "../src/shared/path-lookup.c"
, 76, __PRETTY_FUNCTION__); } while (0);
77
78 /* We don't treat /etc/xdg/systemd here as the spec
79 * suggests because we assume that is a link to
80 * /etc/systemd/ anyway. */
81
82 e = getenv("XDG_DATA_HOME");
83 if (e)
84 j = strappend(e, suffix);
85 else {
86 _cleanup_free___attribute__((cleanup(freep))) char *home = NULL((void*)0);
87
88 r = get_home_dir(&home);
89 if (r < 0)
90 return r;
91
92 j = strjoin(home, "/.local/share", suffix)strjoin_real((home), "/.local/share", suffix, ((void*)0));
93 }
94 if (!j)
95 return -ENOMEM12;
96
97 *ret = j;
98 return 1;
99}
100
101static const char* const user_data_unit_paths[] = {
102 "/usr/local/lib/systemd/user",
103 "/usr/local/share/systemd/user",
104 USER_DATA_UNIT_PATH"/usr/lib/systemd/user",
105 "/usr/lib/systemd/user",
106 "/usr/share/systemd/user",
107 NULL((void*)0)
108};
109
110static const char* const user_config_unit_paths[] = {
111 USER_CONFIG_UNIT_PATH"/etc/systemd/user",
112 "/etc/systemd/user",
113 NULL((void*)0)
114};
115
116int xdg_user_dirs(char ***ret_config_dirs, char ***ret_data_dirs) {
117 /* Implement the mechanisms defined in
118 *
119 * http://standards.freedesktop.org/basedir-spec/basedir-spec-0.6.html
120 *
121 * We look in both the config and the data dirs because we
122 * want to encourage that distributors ship their unit files
123 * as data, and allow overriding as configuration.
124 */
125 const char *e;
126 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **config_dirs = NULL((void*)0), **data_dirs = NULL((void*)0);
127
128 e = getenv("XDG_CONFIG_DIRS");
129 if (e) {
130 config_dirs = strv_split(e, ":");
131 if (!config_dirs)
132 return -ENOMEM12;
133 }
134
135 e = getenv("XDG_DATA_DIRS");
136 if (e)
137 data_dirs = strv_split(e, ":");
138 else
139 data_dirs = strv_new("/usr/local/share",
140 "/usr/share",
141 NULL((void*)0));
142 if (!data_dirs)
143 return -ENOMEM12;
144
145 *ret_config_dirs = config_dirs;
146 *ret_data_dirs = data_dirs;
147 config_dirs = data_dirs = NULL((void*)0);
148 return 0;
149}
150
151static char** user_dirs(
152 const char *persistent_config,
153 const char *runtime_config,
154 const char *global_persistent_config,
155 const char *global_runtime_config,
156 const char *generator,
157 const char *generator_early,
158 const char *generator_late,
159 const char *transient,
160 const char *persistent_control,
161 const char *runtime_control) {
162
163 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **config_dirs = NULL((void*)0), **data_dirs = NULL((void*)0);
164 _cleanup_free___attribute__((cleanup(freep))) char *data_home = NULL((void*)0);
165 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **res = NULL((void*)0);
166 int r;
167
168 r = xdg_user_dirs(&config_dirs, &data_dirs);
169 if (r < 0)
170 return NULL((void*)0);
171
172 r = xdg_user_data_dir(&data_home, "/systemd/user");
173 if (r < 0 && r != -ENXIO6)
174 return NULL((void*)0);
175
176 /* Now merge everything we found. */
177 if (strv_extend(&res, persistent_control) < 0)
178 return NULL((void*)0);
179
180 if (strv_extend(&res, runtime_control) < 0)
181 return NULL((void*)0);
182
183 if (strv_extend(&res, transient) < 0)
184 return NULL((void*)0);
185
186 if (strv_extend(&res, generator_early) < 0)
187 return NULL((void*)0);
188
189 if (strv_extend_strv_concat(&res, config_dirs, "/systemd/user") < 0)
190 return NULL((void*)0);
191
192 if (strv_extend(&res, persistent_config) < 0)
193 return NULL((void*)0);
194
195 /* global config has lower priority than the user config of the same type */
196 if (strv_extend(&res, global_persistent_config) < 0)
197 return NULL((void*)0);
198
199 if (strv_extend_strv(&res, (char**) user_config_unit_paths, false0) < 0)
200 return NULL((void*)0);
201
202 if (strv_extend(&res, runtime_config) < 0)
203 return NULL((void*)0);
204
205 if (strv_extend(&res, global_runtime_config) < 0)
206 return NULL((void*)0);
207
208 if (strv_extend(&res, generator) < 0)
209 return NULL((void*)0);
210
211 if (strv_extend(&res, data_home) < 0)
212 return NULL((void*)0);
213
214 if (strv_extend_strv_concat(&res, data_dirs, "/systemd/user") < 0)
215 return NULL((void*)0);
216
217 if (strv_extend_strv(&res, (char**) user_data_unit_paths, false0) < 0)
218 return NULL((void*)0);
219
220 if (strv_extend(&res, generator_late) < 0)
221 return NULL((void*)0);
222
223 if (path_strv_make_absolute_cwd(res) < 0)
224 return NULL((void*)0);
225
226 return TAKE_PTR(res)({ typeof(res) _ptr_ = (res); (res) = ((void*)0); _ptr_; });
227}
228
229bool_Bool path_is_user_data_dir(const char *path) {
230 assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("path"), "../src/shared/path-lookup.c", 230
, __PRETTY_FUNCTION__); } while (0);
231
232 return strv_contains((char**) user_data_unit_paths, path)(!!strv_find(((char**) user_data_unit_paths), (path)));
233}
234
235bool_Bool path_is_user_config_dir(const char *path) {
236 assert(path)do { if ((__builtin_expect(!!(!(path)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("path"), "../src/shared/path-lookup.c", 236
, __PRETTY_FUNCTION__); } while (0);
237
238 return strv_contains((char**) user_config_unit_paths, path)(!!strv_find(((char**) user_config_unit_paths), (path)));
239}
240
241static int acquire_generator_dirs(
242 UnitFileScope scope,
243 const char *tempdir,
244 char **generator,
245 char **generator_early,
246 char **generator_late) {
247
248 _cleanup_free___attribute__((cleanup(freep))) char *x = NULL((void*)0), *y = NULL((void*)0), *z = NULL((void*)0);
249 const char *prefix;
250
251 assert(generator)do { if ((__builtin_expect(!!(!(generator)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("generator"), "../src/shared/path-lookup.c"
, 251, __PRETTY_FUNCTION__); } while (0);
252 assert(generator_early)do { if ((__builtin_expect(!!(!(generator_early)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("generator_early"), "../src/shared/path-lookup.c"
, 252, __PRETTY_FUNCTION__); } while (0);
253 assert(generator_late)do { if ((__builtin_expect(!!(!(generator_late)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("generator_late"), "../src/shared/path-lookup.c"
, 253, __PRETTY_FUNCTION__); } while (0);
254 assert(IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER, UNIT_FILE_GLOBAL))do { if ((__builtin_expect(!!(!(({ _Bool _found = 0; static __attribute__
((unused)) char _static_assert__macros_need_to_be_extended[20
- sizeof((int[]){UNIT_FILE_SYSTEM, UNIT_FILE_USER, UNIT_FILE_GLOBAL
})/sizeof(int)]; switch(scope) { case UNIT_FILE_SYSTEM: case UNIT_FILE_USER
: case UNIT_FILE_GLOBAL: _found = 1; break; default: break; }
_found; }))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD,
("IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER, UNIT_FILE_GLOBAL)"
), "../src/shared/path-lookup.c", 254, __PRETTY_FUNCTION__); }
while (0);
255
256 if (scope == UNIT_FILE_GLOBAL)
257 return -EOPNOTSUPP95;
258
259 if (tempdir)
260 prefix = tempdir;
261 else if (scope == UNIT_FILE_SYSTEM)
262 prefix = "/run/systemd";
263 else {
264 /* UNIT_FILE_USER */
265 const char *e;
266
267 e = getenv("XDG_RUNTIME_DIR");
268 if (!e)
269 return -ENXIO6;
270
271 prefix = strjoina(e, "/systemd")({ const char *_appendees_[] = { e, "/systemd" }; char *_d_, *
_p_; size_t _len_ = 0; size_t _i_; for (_i_ = 0; _i_ < __extension__
(__builtin_choose_expr( !__builtin_types_compatible_p(typeof
(_appendees_), typeof(&*(_appendees_))), sizeof(_appendees_
)/sizeof((_appendees_)[0]), ((void)0))) && _appendees_
[_i_]; _i_++) _len_ += strlen(_appendees_[_i_]); _p_ = _d_ = __builtin_alloca
(_len_ + 1); for (_i_ = 0; _i_ < __extension__ (__builtin_choose_expr
( !__builtin_types_compatible_p(typeof(_appendees_), typeof(&
*(_appendees_))), sizeof(_appendees_)/sizeof((_appendees_)[0]
), ((void)0))) && _appendees_[_i_]; _i_++) _p_ = stpcpy
(_p_, _appendees_[_i_]); *_p_ = 0; _d_; });
272 }
273
274 x = strappend(prefix, "/generator");
275 if (!x)
276 return -ENOMEM12;
277
278 y = strappend(prefix, "/generator.early");
279 if (!y)
280 return -ENOMEM12;
281
282 z = strappend(prefix, "/generator.late");
283 if (!z)
284 return -ENOMEM12;
285
286 *generator = TAKE_PTR(x)({ typeof(x) _ptr_ = (x); (x) = ((void*)0); _ptr_; });
287 *generator_early = TAKE_PTR(y)({ typeof(y) _ptr_ = (y); (y) = ((void*)0); _ptr_; });
288 *generator_late = TAKE_PTR(z)({ typeof(z) _ptr_ = (z); (z) = ((void*)0); _ptr_; });
289
290 return 0;
291}
292
293static int acquire_transient_dir(
294 UnitFileScope scope,
295 const char *tempdir,
296 char **ret) {
297
298 char *transient;
299
300 assert(ret)do { if ((__builtin_expect(!!(!(ret)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("ret"), "../src/shared/path-lookup.c", 300
, __PRETTY_FUNCTION__); } while (0);
301 assert(IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER, UNIT_FILE_GLOBAL))do { if ((__builtin_expect(!!(!(({ _Bool _found = 0; static __attribute__
((unused)) char _static_assert__macros_need_to_be_extended[20
- sizeof((int[]){UNIT_FILE_SYSTEM, UNIT_FILE_USER, UNIT_FILE_GLOBAL
})/sizeof(int)]; switch(scope) { case UNIT_FILE_SYSTEM: case UNIT_FILE_USER
: case UNIT_FILE_GLOBAL: _found = 1; break; default: break; }
_found; }))),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD,
("IN_SET(scope, UNIT_FILE_SYSTEM, UNIT_FILE_USER, UNIT_FILE_GLOBAL)"
), "../src/shared/path-lookup.c", 301, __PRETTY_FUNCTION__); }
while (0);
302
303 if (scope == UNIT_FILE_GLOBAL)
304 return -EOPNOTSUPP95;
305
306 if (tempdir)
307 transient = strjoin(tempdir, "/transient")strjoin_real((tempdir), "/transient", ((void*)0));
308 else if (scope == UNIT_FILE_SYSTEM)
309 transient = strdup("/run/systemd/transient");
310 else
311 return xdg_user_runtime_dir(ret, "/systemd/transient");
312
313 if (!transient)
314 return -ENOMEM12;
315 *ret = transient;
316 return 0;
317}
318
319static int acquire_config_dirs(UnitFileScope scope, char **persistent, char **runtime) {
320 _cleanup_free___attribute__((cleanup(freep))) char *a = NULL((void*)0), *b = NULL((void*)0);
321 int r;
322
323 assert(persistent)do { if ((__builtin_expect(!!(!(persistent)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("persistent"), "../src/shared/path-lookup.c"
, 323, __PRETTY_FUNCTION__); } while (0);
15
←
Taking false branch
→
16
←
Loop condition is false. Exiting loop
→
324 assert(runtime)do { if ((__builtin_expect(!!(!(runtime)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("runtime"), "../src/shared/path-lookup.c"
, 324, __PRETTY_FUNCTION__); } while (0);
17
←
Taking false branch
→
18
←
Loop condition is false. Exiting loop
→
325
326 switch (scope) {
19
←
Control jumps to 'case UNIT_FILE_GLOBAL:' at line 333
→
327
328 case UNIT_FILE_SYSTEM:
329 a = strdup(SYSTEM_CONFIG_UNIT_PATH"/etc/systemd/system");
330 b = strdup("/run/systemd/system");
331 break;
332
333 case UNIT_FILE_GLOBAL:
334 a = strdup(USER_CONFIG_UNIT_PATH"/etc/systemd/user");
20
←
Memory is allocated
→
335 b = strdup("/run/systemd/user");
336 break;
21
←
 Execution continues on line 361
→
337
338 case UNIT_FILE_USER:
339 r = xdg_user_config_dir(&a, "/systemd/user");
340 if (r < 0 && r != -ENXIO6)
341 return r;
342
343 r = xdg_user_runtime_dir(runtime, "/systemd/user");
344 if (r < 0) {
345 if (r != -ENXIO6)
346 return r;
347
348 /* If XDG_RUNTIME_DIR is not set, don't consider that fatal, simply initialize the runtime
349 * directory to NULL */
350 *runtime = NULL((void*)0);
351 }
352
353 *persistent = TAKE_PTR(a)({ typeof(a) _ptr_ = (a); (a) = ((void*)0); _ptr_; });
354
355 return 0;
356
357 default:
358 assert_not_reached("Hmm, unexpected scope value.")do { log_assert_failed_unreachable_realm(LOG_REALM_SYSTEMD, (
"Hmm, unexpected scope value."), "../src/shared/path-lookup.c"
, 358, __PRETTY_FUNCTION__); } while (0);
359 }
360
361 if (!a || !b)
22
←
Assuming 'a' is non-null
→
23
←
Assuming 'b' is null
→
24
←
Taking true branch
→
362 return -ENOMEM12;
25
←
Potential leak of memory pointed to by 'a'
363
364 *persistent = TAKE_PTR(a)({ typeof(a) _ptr_ = (a); (a) = ((void*)0); _ptr_; });
365 *runtime = TAKE_PTR(b)({ typeof(b) _ptr_ = (b); (b) = ((void*)0); _ptr_; });
366
367 return 0;
368}
369
370static int acquire_control_dirs(UnitFileScope scope, char **persistent, char **runtime) {
371 _cleanup_free___attribute__((cleanup(freep))) char *a = NULL((void*)0);
372 int r;
373
374 assert(persistent)do { if ((__builtin_expect(!!(!(persistent)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("persistent"), "../src/shared/path-lookup.c"
, 374, __PRETTY_FUNCTION__); } while (0);
375 assert(runtime)do { if ((__builtin_expect(!!(!(runtime)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("runtime"), "../src/shared/path-lookup.c"
, 375, __PRETTY_FUNCTION__); } while (0);
376
377 switch (scope) {
378
379 case UNIT_FILE_SYSTEM: {
380 _cleanup_free___attribute__((cleanup(freep))) char *b = NULL((void*)0);
381
382 a = strdup("/etc/systemd/system.control");
383 if (!a)
384 return -ENOMEM12;
385
386 b = strdup("/run/systemd/system.control");
387 if (!b)
388 return -ENOMEM12;
389
390 *runtime = TAKE_PTR(b)({ typeof(b) _ptr_ = (b); (b) = ((void*)0); _ptr_; });
391
392 break;
393 }
394
395 case UNIT_FILE_USER:
396 r = xdg_user_config_dir(&a, "/systemd/user.control");
397 if (r < 0 && r != -ENXIO6)
398 return r;
399
400 r = xdg_user_runtime_dir(runtime, "/systemd/user.control");
401 if (r < 0) {
402 if (r != -ENXIO6)
403 return r;
404
405 /* If XDG_RUNTIME_DIR is not set, don't consider this fatal, simply initialize the directory to
406 * NULL */
407 *runtime = NULL((void*)0);
408 }
409
410 break;
411
412 case UNIT_FILE_GLOBAL:
413 return -EOPNOTSUPP95;
414
415 default:
416 assert_not_reached("Hmm, unexpected scope value.")do { log_assert_failed_unreachable_realm(LOG_REALM_SYSTEMD, (
"Hmm, unexpected scope value."), "../src/shared/path-lookup.c"
, 416, __PRETTY_FUNCTION__); } while (0);
417 }
418
419 *persistent = TAKE_PTR(a)({ typeof(a) _ptr_ = (a); (a) = ((void*)0); _ptr_; });
420
421 return 0;
422}
423
424static int patch_root_prefix(char **p, const char *root_dir) {
425 char *c;
426
427 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/path-lookup.c", 427
, __PRETTY_FUNCTION__); } while (0);
428
429 if (!*p)
430 return 0;
431
432 c = prefix_root(root_dir, *p);
433 if (!c)
434 return -ENOMEM12;
435
436 free(*p);
437 *p = c;
438
439 return 0;
440}
441
442static int patch_root_prefix_strv(char **l, const char *root_dir) {
443 char **i;
444 int r;
445
446 if (!root_dir)
447 return 0;
448
449 STRV_FOREACH(i, l)for ((i) = (l); (i) && *(i); (i)++) {
450 r = patch_root_prefix(i, root_dir);
451 if (r < 0)
452 return r;
453 }
454
455 return 0;
456}
457
458int lookup_paths_init(
459 LookupPaths *p,
460 UnitFileScope scope,
461 LookupPathsFlags flags,
462 const char *root_dir) {
463
464 _cleanup_(rmdir_and_freep)__attribute__((cleanup(rmdir_and_freep))) char *tempdir = NULL((void*)0);
465 _cleanup_free___attribute__((cleanup(freep))) char
466 *root = NULL((void*)0),
467 *persistent_config = NULL((void*)0), *runtime_config = NULL((void*)0),
468 *global_persistent_config = NULL((void*)0), *global_runtime_config = NULL((void*)0),
469 *generator = NULL((void*)0), *generator_early = NULL((void*)0), *generator_late = NULL((void*)0),
470 *transient = NULL((void*)0),
471 *persistent_control = NULL((void*)0), *runtime_control = NULL((void*)0);
472 bool_Bool append = false0; /* Add items from SYSTEMD_UNIT_PATH before normal directories */
473 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **paths = NULL((void*)0);
474 const char *e;
475 int r;
476
477 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/path-lookup.c", 477
, __PRETTY_FUNCTION__); } while (0);
1
Assuming 'p' is non-null
→
2
←
Taking false branch
→
3
←
Loop condition is false. Exiting loop
→
478 assert(scope >= 0)do { if ((__builtin_expect(!!(!(scope >= 0)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("scope >= 0"), "../src/shared/path-lookup.c"
, 478, __PRETTY_FUNCTION__); } while (0);
4
←
Assuming 'scope' is >= 0
→
5
←
Taking false branch
→
6
←
Loop condition is false. Exiting loop
→
479 assert(scope < _UNIT_FILE_SCOPE_MAX)do { if ((__builtin_expect(!!(!(scope < _UNIT_FILE_SCOPE_MAX
)),0))) log_assert_failed_realm(LOG_REALM_SYSTEMD, ("scope < _UNIT_FILE_SCOPE_MAX"
), "../src/shared/path-lookup.c", 479, __PRETTY_FUNCTION__); }
while (0);
7
←
Assuming 'scope' is < _UNIT_FILE_SCOPE_MAX
→
8
←
Taking false branch
→
9
←
Loop condition is false. Exiting loop
→
480
481#if HAVE_SPLIT_USR0
482 flags |= LOOKUP_PATHS_SPLIT_USR;
483#endif
484
485 if (!empty_or_root(root_dir)) {
10
←
Assuming the condition is false
→
11
←
Taking false branch
→
486 if (scope == UNIT_FILE_USER)
487 return -EINVAL22;
488
489 r = is_dir(root_dir, true1);
490 if (r < 0)
491 return r;
492 if (r == 0)
493 return -ENOTDIR20;
494
495 root = strdup(root_dir);
496 if (!root)
497 return -ENOMEM12;
498 }
499
500 if (flags & LOOKUP_PATHS_TEMPORARY_GENERATED) {
12
←
Assuming the condition is false
→
13
←
Taking false branch
→
501 r = mkdtemp_malloc("/tmp/systemd-temporary-XXXXXX", &tempdir);
502 if (r < 0)
503 return log_error_errno(r, "Failed to create temporary directory: %m")({ int _level = ((3)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/path-lookup.c", 503, __func__, "Failed to create temporary directory: %m"
) : -abs(_e); });
504 }
505
506 /* Note: when XDG_RUNTIME_DIR is not set this will not return -ENXIO, but simply set runtime_config to NULL */
507 r = acquire_config_dirs(scope, &persistent_config, &runtime_config);
14
←
Calling 'acquire_config_dirs'
→
508 if (r < 0)
509 return r;
510
511 if (scope == UNIT_FILE_USER) {
512 r = acquire_config_dirs(UNIT_FILE_GLOBAL, &global_persistent_config, &global_runtime_config);
513 if (r < 0)
514 return r;
515 }
516
517 if ((flags & LOOKUP_PATHS_EXCLUDE_GENERATED) == 0) {
518 /* Note: if XDG_RUNTIME_DIR is not set, this will fail completely with ENXIO */
519 r = acquire_generator_dirs(scope, tempdir,
520 &generator, &generator_early, &generator_late);
521 if (r < 0 && !IN_SET(r, -EOPNOTSUPP, -ENXIO)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended
[20 - sizeof((int[]){-95, -6})/sizeof(int)]; switch(r) { case
-95: case -6: _found = 1; break; default: break; } _found; }
))
522 return r;
523 }
524
525 /* Note: if XDG_RUNTIME_DIR is not set, this will fail completely with ENXIO */
526 r = acquire_transient_dir(scope, tempdir, &transient);
527 if (r < 0 && !IN_SET(r, -EOPNOTSUPP, -ENXIO)({ _Bool _found = 0; static __attribute__ ((unused)) char _static_assert__macros_need_to_be_extended
[20 - sizeof((int[]){-95, -6})/sizeof(int)]; switch(r) { case
-95: case -6: _found = 1; break; default: break; } _found; }
))
528 return r;
529
530 /* Note: when XDG_RUNTIME_DIR is not set this will not return -ENXIO, but simply set runtime_control to NULL */
531 r = acquire_control_dirs(scope, &persistent_control, &runtime_control);
532 if (r < 0 && r != -EOPNOTSUPP95)
533 return r;
534
535 /* First priority is whatever has been passed to us via env vars */
536 e = getenv("SYSTEMD_UNIT_PATH");
537 if (e) {
538 const char *k;
539
540 k = endswith(e, ":");
541 if (k) {
542 e = strndupa(e, k - e)(__extension__ ({ const char *__old = (e); size_t __len = strnlen
(__old, (k - e)); char *__new = (char *) __builtin_alloca (__len
+ 1); __new[__len] = '\0'; (char *) memcpy (__new, __old, __len
); }));
543 append = true1;
544 }
545
546 /* FIXME: empty components in other places should be rejected. */
547
548 r = path_split_and_make_absolute(e, &paths);
549 if (r < 0)
550 return r;
551 }
552
553 if (!paths || append) {
554 /* Let's figure something out. */
555
556 _cleanup_strv_free___attribute__((cleanup(strv_freep))) char **add = NULL((void*)0);
557
558 /* For the user units we include share/ in the search
559 * path in order to comply with the XDG basedir spec.
560 * For the system stuff we avoid such nonsense. OTOH
561 * we include /lib in the search path for the system
562 * stuff but avoid it for user stuff. */
563
564 switch (scope) {
565
566 case UNIT_FILE_SYSTEM:
567 add = strv_new(
568 /* If you modify this you also want to modify
569 * systemdsystemunitpath= in systemd.pc.in! */
570 STRV_IFNOTNULL(persistent_control),
571 STRV_IFNOTNULL(runtime_control),
572 STRV_IFNOTNULL(transient),
573 STRV_IFNOTNULL(generator_early),
574 persistent_config,
575 SYSTEM_CONFIG_UNIT_PATH"/etc/systemd/system",
576 "/etc/systemd/system",
577 runtime_config,
578 "/run/systemd/system",
579 STRV_IFNOTNULL(generator),
580 "/usr/local/lib/systemd/system",
581 SYSTEM_DATA_UNIT_PATH"/usr/lib/systemd/system",
582 "/usr/lib/systemd/system",
583 STRV_IFNOTNULL(flags & LOOKUP_PATHS_SPLIT_USR ? "/lib/systemd/system" : NULL((void*)0)),
584 STRV_IFNOTNULL(generator_late),
585 NULL((void*)0));
586 break;
587
588 case UNIT_FILE_GLOBAL:
589 add = strv_new(
590 /* If you modify this you also want to modify
591 * systemduserunitpath= in systemd.pc.in, and
592 * the arrays in user_dirs() above! */
593 STRV_IFNOTNULL(persistent_control),
594 STRV_IFNOTNULL(runtime_control),
595 STRV_IFNOTNULL(transient),
596 STRV_IFNOTNULL(generator_early),
597 persistent_config,
598 USER_CONFIG_UNIT_PATH"/etc/systemd/user",
599 "/etc/systemd/user",
600 runtime_config,
601 "/run/systemd/user",
602 STRV_IFNOTNULL(generator),
603 "/usr/local/share/systemd/user",
604 "/usr/share/systemd/user",
605 "/usr/local/lib/systemd/user",
606 USER_DATA_UNIT_PATH"/usr/lib/systemd/user",
607 "/usr/lib/systemd/user",
608 STRV_IFNOTNULL(generator_late),
609 NULL((void*)0));
610 break;
611
612 case UNIT_FILE_USER:
613 add = user_dirs(persistent_config, runtime_config,
614 global_persistent_config, global_runtime_config,
615 generator, generator_early, generator_late,
616 transient,
617 persistent_control, runtime_control);
618 break;
619
620 default:
621 assert_not_reached("Hmm, unexpected scope?")do { log_assert_failed_unreachable_realm(LOG_REALM_SYSTEMD, (
"Hmm, unexpected scope?"), "../src/shared/path-lookup.c", 621
, __PRETTY_FUNCTION__); } while (0);
622 }
623
624 if (!add)
625 return -ENOMEM12;
626
627 if (paths) {
628 r = strv_extend_strv(&paths, add, true1);
629 if (r < 0)
630 return r;
631 } else
632 /* Small optimization: if paths is NULL (and it usually is), we can simply assign 'add' to it,
633 * and don't have to copy anything */
634 paths = TAKE_PTR(add)({ typeof(add) _ptr_ = (add); (add) = ((void*)0); _ptr_; });
635 }
636
637 r = patch_root_prefix(&persistent_config, root);
638 if (r < 0)
639 return r;
640 r = patch_root_prefix(&runtime_config, root);
641 if (r < 0)
642 return r;
643
644 r = patch_root_prefix(&generator, root);
645 if (r < 0)
646 return r;
647 r = patch_root_prefix(&generator_early, root);
648 if (r < 0)
649 return r;
650 r = patch_root_prefix(&generator_late, root);
651 if (r < 0)
652 return r;
653
654 r = patch_root_prefix(&transient, root);
655 if (r < 0)
656 return r;
657
658 r = patch_root_prefix(&persistent_control, root);
659 if (r < 0)
660 return r;
661
662 r = patch_root_prefix(&runtime_control, root);
663 if (r < 0)
664 return r;
665
666 r = patch_root_prefix_strv(paths, root);
667 if (r < 0)
668 return -ENOMEM12;
669
670 p->search_path = strv_uniq(paths);
671 paths = NULL((void*)0);
672
673 p->persistent_config = TAKE_PTR(persistent_config)({ typeof(persistent_config) _ptr_ = (persistent_config); (persistent_config
) = ((void*)0); _ptr_; });
674 p->runtime_config = TAKE_PTR(runtime_config)({ typeof(runtime_config) _ptr_ = (runtime_config); (runtime_config
) = ((void*)0); _ptr_; });
675
676 p->generator = TAKE_PTR(generator)({ typeof(generator) _ptr_ = (generator); (generator) = ((void
*)0); _ptr_; });
677 p->generator_early = TAKE_PTR(generator_early)({ typeof(generator_early) _ptr_ = (generator_early); (generator_early
) = ((void*)0); _ptr_; });
678 p->generator_late = TAKE_PTR(generator_late)({ typeof(generator_late) _ptr_ = (generator_late); (generator_late
) = ((void*)0); _ptr_; });
679
680 p->transient = TAKE_PTR(transient)({ typeof(transient) _ptr_ = (transient); (transient) = ((void
*)0); _ptr_; });
681
682 p->persistent_control = TAKE_PTR(persistent_control)({ typeof(persistent_control) _ptr_ = (persistent_control); (
persistent_control) = ((void*)0); _ptr_; });
683 p->runtime_control = TAKE_PTR(runtime_control)({ typeof(runtime_control) _ptr_ = (runtime_control); (runtime_control
) = ((void*)0); _ptr_; });
684
685 p->root_dir = TAKE_PTR(root)({ typeof(root) _ptr_ = (root); (root) = ((void*)0); _ptr_; }
);
686 p->temporary_dir = TAKE_PTR(tempdir)({ typeof(tempdir) _ptr_ = (tempdir); (tempdir) = ((void*)0);
_ptr_; });
687
688 return 0;
689}
690
691void lookup_paths_free(LookupPaths *p) {
692 if (!p)
693 return;
694
695 p->search_path = strv_free(p->search_path);
696
697 p->persistent_config = mfree(p->persistent_config);
698 p->runtime_config = mfree(p->runtime_config);
699
700 p->generator = mfree(p->generator);
701 p->generator_early = mfree(p->generator_early);
702 p->generator_late = mfree(p->generator_late);
703
704 p->transient = mfree(p->transient);
705
706 p->persistent_control = mfree(p->persistent_control);
707 p->runtime_control = mfree(p->runtime_control);
708
709 p->root_dir = mfree(p->root_dir);
710 p->temporary_dir = mfree(p->temporary_dir);
711}
712
713int lookup_paths_reduce(LookupPaths *p) {
714 _cleanup_free___attribute__((cleanup(freep))) struct stat *stats = NULL((void*)0);
715 size_t n_stats = 0, allocated = 0;
716 size_t c = 0;
717 int r;
718
719 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/path-lookup.c", 719
, __PRETTY_FUNCTION__); } while (0);
720
721 /* Drop duplicates and non-existing directories from the search path. We figure out whether two directories are
722 * the same by comparing their device and inode numbers. */
723
724 if (!p->search_path)
725 return 0;
726
727 while (p->search_path[c]) {
728 struct stat st;
729 size_t k;
730
731 /* Never strip the transient and control directories from the path */
732 if (path_equal_ptr(p->search_path[c], p->transient) ||
733 path_equal_ptr(p->search_path[c], p->persistent_control) ||
734 path_equal_ptr(p->search_path[c], p->runtime_control)) {
735 c++;
736 continue;
737 }
738
739 r = chase_symlinks_and_stat(p->search_path[c], p->root_dir, 0, NULL((void*)0), &st);
740 if (r == -ENOENT2)
741 goto remove_item;
742 if (r < 0) {
743 /* If something we don't grok happened, let's better leave it in. */
744 log_debug_errno(r, "Failed to chase and stat %s: %m", p->search_path[c])({ int _level = ((7)), _e = ((r)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/path-lookup.c", 744, __func__, "Failed to chase and stat %s: %m"
, p->search_path[c]) : -abs(_e); });
745 c++;
746 continue;
747 }
748
749 for (k = 0; k < n_stats; k++)
750 if (stats[k].st_dev == st.st_dev &&
751 stats[k].st_ino == st.st_ino)
752 break;
753
754 if (k < n_stats) /* Is there already an entry with the same device/inode? */
755 goto remove_item;
756
757 if (!GREEDY_REALLOC(stats, allocated, n_stats+1)greedy_realloc((void**) &(stats), &(allocated), (n_stats
+1), sizeof((stats)[0])))
758 return -ENOMEM12;
759
760 stats[n_stats++] = st;
761 c++;
762 continue;
763
764 remove_item:
765 free(p->search_path[c]);
766 memmove(p->search_path + c,
767 p->search_path + c + 1,
768 (strv_length(p->search_path + c + 1) + 1) * sizeof(char*));
769 }
770
771 if (strv_isempty(p->search_path)) {
772 log_debug("Ignoring unit files.")({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/path-lookup.c", 772, __func__, "Ignoring unit files."
) : -abs(_e); });
773 p->search_path = strv_free(p->search_path);
774 } else {
775 _cleanup_free___attribute__((cleanup(freep))) char *t;
776
777 t = strv_join(p->search_path, "\n\t");
778 if (!t)
779 return -ENOMEM12;
780
781 log_debug("Looking for unit files in (higher priority first):\n\t%s", t)({ int _level = (((7))), _e = ((0)), _realm = (LOG_REALM_SYSTEMD
); (log_get_max_level_realm(_realm) >= ((_level) & 0x07
)) ? log_internal_realm(((_realm) << 10 | (_level)), _e
, "../src/shared/path-lookup.c", 781, __func__, "Looking for unit files in (higher priority first):\n\t%s"
, t) : -abs(_e); });
782 }
783
784 return 0;
785}
786
787int lookup_paths_mkdir_generator(LookupPaths *p) {
788 int r, q;
789
790 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/path-lookup.c", 790
, __PRETTY_FUNCTION__); } while (0);
791
792 if (!p->generator || !p->generator_early || !p->generator_late)
793 return -EINVAL22;
794
795 r = mkdir_p_label(p->generator, 0755);
796
797 q = mkdir_p_label(p->generator_early, 0755);
798 if (q < 0 && r >= 0)
799 r = q;
800
801 q = mkdir_p_label(p->generator_late, 0755);
802 if (q < 0 && r >= 0)
803 r = q;
804
805 return r;
806}
807
808void lookup_paths_trim_generator(LookupPaths *p) {
809 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/path-lookup.c", 809
, __PRETTY_FUNCTION__); } while (0);
810
811 /* Trim empty dirs */
812
813 if (p->generator)
814 (void) rmdir(p->generator);
815 if (p->generator_early)
816 (void) rmdir(p->generator_early);
817 if (p->generator_late)
818 (void) rmdir(p->generator_late);
819}
820
821void lookup_paths_flush_generator(LookupPaths *p) {
822 assert(p)do { if ((__builtin_expect(!!(!(p)),0))) log_assert_failed_realm
(LOG_REALM_SYSTEMD, ("p"), "../src/shared/path-lookup.c", 822
, __PRETTY_FUNCTION__); } while (0);
823
824 /* Flush the generated unit files in full */
825
826 if (p->generator)
827 (void) rm_rf(p->generator, REMOVE_ROOT|REMOVE_PHYSICAL);
828 if (p->generator_early)
829 (void) rm_rf(p->generator_early, REMOVE_ROOT|REMOVE_PHYSICAL);
830 if (p->generator_late)
831 (void) rm_rf(p->generator_late, REMOVE_ROOT|REMOVE_PHYSICAL);
832
833 if (p->temporary_dir)
834 (void) rm_rf(p->temporary_dir, REMOVE_ROOT|REMOVE_PHYSICAL);
835}
836
837char **generator_binary_paths(UnitFileScope scope) {
838
839 switch (scope) {
840
841 case UNIT_FILE_SYSTEM:
842 return strv_new("/run/systemd/system-generators",
843 "/etc/systemd/system-generators",
844 "/usr/local/lib/systemd/system-generators",
845 SYSTEM_GENERATOR_PATH"/usr/lib/systemd/system-generators",
846 NULL((void*)0));
847
848 case UNIT_FILE_GLOBAL:
849 case UNIT_FILE_USER:
850 return strv_new("/run/systemd/user-generators",
851 "/etc/systemd/user-generators",
852 "/usr/local/lib/systemd/user-generators",
853 USER_GENERATOR_PATH"/usr/lib/systemd/user-generators",
854 NULL((void*)0));
855
856 default:
857 assert_not_reached("Hmm, unexpected scope.")do { log_assert_failed_unreachable_realm(LOG_REALM_SYSTEMD, (
"Hmm, unexpected scope."), "../src/shared/path-lookup.c", 857
, __PRETTY_FUNCTION__); } while (0);
858 }
859}