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[thirdparty/systemd.git] / src / shared / condition.c
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53e1b683 1/* SPDX-License-Identifier: LGPL-2.1+ */
b77c08e0 2
b77c08e0 3#include <errno.h>
a8fbdf54 4#include <fcntl.h>
84ac7bea 5#include <fnmatch.h>
a8fbdf54 6#include <limits.h>
84ac7bea 7#include <stdlib.h>
a8fbdf54 8#include <sys/stat.h>
c465a29f 9#include <sys/types.h>
5022f08a 10#include <sys/utsname.h>
a8fbdf54 11#include <time.h>
b77c08e0 12#include <unistd.h>
b77c08e0 13
d1bddcec 14#include "sd-id128.h"
84ac7bea 15
b5efdb8a 16#include "alloc-util.h"
d1bddcec 17#include "apparmor-util.h"
84ac7bea 18#include "architecture.h"
430f0182 19#include "audit-util.h"
2822da4f 20#include "cap-list.h"
e16647c3 21#include "cgroup-util.h"
3ffd4af2 22#include "condition.h"
f44b3035 23#include "cpu-set-util.h"
0bb2f0f1 24#include "efi-loader.h"
78d76525 25#include "env-file.h"
84ac7bea 26#include "extract-word.h"
3ffd4af2 27#include "fd-util.h"
fb8b0869 28#include "fileio.h"
7d50b32a 29#include "glob-util.h"
958b66ea 30#include "hostname-util.h"
84ac7bea 31#include "ima-util.h"
754f719a 32#include "limits-util.h"
a8fbdf54
TA
33#include "list.h"
34#include "macro.h"
049af8ad 35#include "mountpoint-util.h"
6bedfcbb 36#include "parse-util.h"
84ac7bea 37#include "path-util.h"
4e731273 38#include "proc-cmdline.h"
df0ff127 39#include "process-util.h"
84ac7bea
LP
40#include "selinux-util.h"
41#include "smack-util.h"
8fcde012 42#include "stat-util.h"
8b43440b 43#include "string-table.h"
07630cea 44#include "string-util.h"
ed440f6b 45#include "tomoyo-util.h"
c465a29f 46#include "user-util.h"
84ac7bea
LP
47#include "util.h"
48#include "virt.h"
b77c08e0
TG
49
50Condition* condition_new(ConditionType type, const char *parameter, bool trigger, bool negate) {
51 Condition *c;
52
b80ba1da 53 assert(type >= 0);
b77c08e0 54 assert(type < _CONDITION_TYPE_MAX);
8a9c6071 55 assert((!parameter) == (type == CONDITION_NULL));
b77c08e0 56
78d76525 57 c = new(Condition, 1);
b77c08e0
TG
58 if (!c)
59 return NULL;
60
78d76525
LP
61 *c = (Condition) {
62 .type = type,
63 .trigger = trigger,
64 .negate = negate,
65 };
b77c08e0 66
78d76525
LP
67 if (parameter) {
68 c->parameter = strdup(parameter);
69 if (!c->parameter)
70 return mfree(c);
b77c08e0
TG
71 }
72
73 return c;
74}
75
76void condition_free(Condition *c) {
77 assert(c);
78
79 free(c->parameter);
80 free(c);
81}
82
7bb55ed0
YW
83Condition* condition_free_list_type(Condition *head, ConditionType type) {
84 Condition *c, *n;
b77c08e0 85
7bb55ed0
YW
86 LIST_FOREACH_SAFE(conditions, c, n, head)
87 if (type < 0 || c->type == type) {
88 LIST_REMOVE(conditions, head, c);
c4f58dea 89 condition_free(c);
7bb55ed0 90 }
447021aa 91
7bb55ed0
YW
92 assert(type >= 0 || !head);
93 return head;
b77c08e0
TG
94}
95
a4705396 96static int condition_test_kernel_command_line(Condition *c) {
07318c29
LP
97 _cleanup_free_ char *line = NULL;
98 const char *p;
b77c08e0
TG
99 bool equal;
100 int r;
b77c08e0
TG
101
102 assert(c);
103 assert(c->parameter);
104 assert(c->type == CONDITION_KERNEL_COMMAND_LINE);
105
106 r = proc_cmdline(&line);
107 if (r < 0)
592fd144 108 return r;
b77c08e0 109
5d904a6a 110 equal = strchr(c->parameter, '=');
07318c29 111
c58bd76a 112 for (p = line;;) {
07318c29
LP
113 _cleanup_free_ char *word = NULL;
114 bool found;
115
4ec85141 116 r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE|EXTRACT_RELAX);
592fd144
LP
117 if (r < 0)
118 return r;
119 if (r == 0)
a4705396 120 break;
07318c29
LP
121
122 if (equal)
123 found = streq(word, c->parameter);
124 else {
125 const char *f;
126
127 f = startswith(word, c->parameter);
4c701096 128 found = f && IN_SET(*f, 0, '=');
b77c08e0
TG
129 }
130
07318c29 131 if (found)
a4705396 132 return true;
b77c08e0 133 }
b77c08e0 134
a4705396 135 return false;
b77c08e0
TG
136}
137
ba22ff13
LP
138typedef enum {
139 /* Listed in order of checking. Note that some comparators are prefixes of others, hence the longest
140 * should be listed first. */
141 ORDER_LOWER_OR_EQUAL,
142 ORDER_GREATER_OR_EQUAL,
143 ORDER_LOWER,
144 ORDER_GREATER,
145 ORDER_EQUAL,
2877d428 146 ORDER_UNEQUAL,
ba22ff13
LP
147 _ORDER_MAX,
148 _ORDER_INVALID = -1
149} OrderOperator;
150
151static OrderOperator parse_order(const char **s) {
68c58c67
LP
152
153 static const char *const prefix[_ORDER_MAX] = {
ba22ff13
LP
154 [ORDER_LOWER_OR_EQUAL] = "<=",
155 [ORDER_GREATER_OR_EQUAL] = ">=",
156 [ORDER_LOWER] = "<",
157 [ORDER_GREATER] = ">",
158 [ORDER_EQUAL] = "=",
2877d428 159 [ORDER_UNEQUAL] = "!=",
68c58c67 160 };
5022f08a 161
ba22ff13 162 OrderOperator i;
5022f08a 163
68c58c67 164 for (i = 0; i < _ORDER_MAX; i++) {
ba22ff13
LP
165 const char *e;
166
167 e = startswith(*s, prefix[i]);
168 if (e) {
169 *s = e;
170 return i;
171 }
68c58c67
LP
172 }
173
ba22ff13
LP
174 return _ORDER_INVALID;
175}
68c58c67 176
ba22ff13 177static bool test_order(int k, OrderOperator p) {
68c58c67 178
ba22ff13 179 switch (p) {
68c58c67 180
ba22ff13 181 case ORDER_LOWER:
68c58c67
LP
182 return k < 0;
183
ba22ff13 184 case ORDER_LOWER_OR_EQUAL:
68c58c67
LP
185 return k <= 0;
186
ba22ff13 187 case ORDER_EQUAL:
68c58c67
LP
188 return k == 0;
189
2877d428
LP
190 case ORDER_UNEQUAL:
191 return k != 0;
192
ba22ff13 193 case ORDER_GREATER_OR_EQUAL:
68c58c67
LP
194 return k >= 0;
195
ba22ff13 196 case ORDER_GREATER:
68c58c67
LP
197 return k > 0;
198
199 default:
ba22ff13
LP
200 assert_not_reached("unknown order");
201
68c58c67 202 }
5022f08a
LP
203}
204
ba22ff13
LP
205static int condition_test_kernel_version(Condition *c) {
206 OrderOperator order;
207 struct utsname u;
208 const char *p;
910c6d09 209 bool first = true;
ba22ff13
LP
210
211 assert(c);
212 assert(c->parameter);
213 assert(c->type == CONDITION_KERNEL_VERSION);
214
215 assert_se(uname(&u) >= 0);
216
217 p = c->parameter;
ba22ff13 218
910c6d09
ZJS
219 for (;;) {
220 _cleanup_free_ char *word = NULL;
221 const char *s;
222 int r;
223
224 r = extract_first_word(&p, &word, NULL, EXTRACT_UNQUOTE);
225 if (r < 0)
226 return log_debug_errno(r, "Failed to parse condition string \"%s\": %m", p);
227 if (r == 0)
228 break;
229
230 s = strstrip(word);
231 order = parse_order(&s);
232 if (order >= 0) {
233 s += strspn(s, WHITESPACE);
234 if (isempty(s)) {
235 if (first) {
236 /* For backwards compatibility, allow whitespace between the operator and
237 * value, without quoting, but only in the first expression. */
238 word = mfree(word);
239 r = extract_first_word(&p, &word, NULL, 0);
240 if (r < 0)
241 return log_debug_errno(r, "Failed to parse condition string \"%s\": %m", p);
242 if (r == 0)
243 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unexpected end of expression: %s", p);
244 s = word;
245 } else
246 return log_debug_errno(SYNTHETIC_ERRNO(EINVAL), "Unexpected end of expression: %s", p);
247 }
248
249 r = test_order(str_verscmp(u.release, s), order);
250 } else
251 /* No prefix? Then treat as glob string */
252 r = fnmatch(s, u.release, 0) == 0;
253
254 if (r == 0)
255 return false;
256
257 first = false;
258 }
ba22ff13 259
910c6d09 260 return true;
ba22ff13
LP
261}
262
754f719a
LP
263static int condition_test_memory(Condition *c) {
264 OrderOperator order;
265 uint64_t m, k;
266 const char *p;
267 int r;
268
269 assert(c);
270 assert(c->parameter);
271 assert(c->type == CONDITION_MEMORY);
272
273 m = physical_memory();
274
275 p = c->parameter;
276 order = parse_order(&p);
277 if (order < 0)
278 order = ORDER_GREATER_OR_EQUAL; /* default to >= check, if nothing is specified. */
279
280 r = safe_atou64(p, &k);
281 if (r < 0)
282 return log_debug_errno(r, "Failed to parse size: %m");
283
284 return test_order(CMP(m, k), order);
285}
286
287static int condition_test_cpus(Condition *c) {
288 OrderOperator order;
289 const char *p;
290 unsigned k;
291 int r, n;
292
293 assert(c);
294 assert(c->parameter);
295 assert(c->type == CONDITION_CPUS);
296
297 n = cpus_in_affinity_mask();
298 if (n < 0)
299 return log_debug_errno(n, "Failed to determine CPUs in affinity mask: %m");
300
301 p = c->parameter;
302 order = parse_order(&p);
303 if (order < 0)
304 order = ORDER_GREATER_OR_EQUAL; /* default to >= check, if nothing is specified. */
305
306 r = safe_atou(p, &k);
307 if (r < 0)
308 return log_debug_errno(r, "Failed to parse number of CPUs: %m");
309
310 return test_order(CMP((unsigned) n, k), order);
311}
312
c465a29f
FS
313static int condition_test_user(Condition *c) {
314 uid_t id;
315 int r;
316 _cleanup_free_ char *username = NULL;
317 const char *u;
318
319 assert(c);
320 assert(c->parameter);
321 assert(c->type == CONDITION_USER);
322
323 r = parse_uid(c->parameter, &id);
324 if (r >= 0)
325 return id == getuid() || id == geteuid();
326
534bab66 327 if (streq("@system", c->parameter))
ece877d4 328 return uid_is_system(getuid()) || uid_is_system(geteuid());
534bab66 329
c465a29f
FS
330 username = getusername_malloc();
331 if (!username)
332 return -ENOMEM;
333
334 if (streq(username, c->parameter))
335 return 1;
336
df0ff127 337 if (getpid_cached() == 1)
c465a29f
FS
338 return streq(c->parameter, "root");
339
340 u = c->parameter;
fafff8f1 341 r = get_user_creds(&u, &id, NULL, NULL, NULL, USER_CREDS_ALLOW_MISSING);
c465a29f
FS
342 if (r < 0)
343 return 0;
344
345 return id == getuid() || id == geteuid();
346}
347
e16647c3
CD
348static int condition_test_control_group_controller(Condition *c) {
349 int r;
350 CGroupMask system_mask, wanted_mask = 0;
351
352 assert(c);
353 assert(c->parameter);
354 assert(c->type == CONDITION_CONTROL_GROUP_CONTROLLER);
355
356 r = cg_mask_supported(&system_mask);
357 if (r < 0)
358 return log_debug_errno(r, "Failed to determine supported controllers: %m");
359
360 r = cg_mask_from_string(c->parameter, &wanted_mask);
361 if (r < 0 || wanted_mask <= 0) {
362 /* This won't catch the case that we have an unknown controller
363 * mixed in with valid ones -- these are only assessed on the
364 * validity of the valid controllers found. */
365 log_debug("Failed to parse cgroup string: %s", c->parameter);
366 return 1;
367 }
368
d94a24ca 369 return FLAGS_SET(system_mask, wanted_mask);
e16647c3
CD
370}
371
c465a29f
FS
372static int condition_test_group(Condition *c) {
373 gid_t id;
374 int r;
375
376 assert(c);
377 assert(c->parameter);
378 assert(c->type == CONDITION_GROUP);
379
380 r = parse_gid(c->parameter, &id);
381 if (r >= 0)
382 return in_gid(id);
383
384 /* Avoid any NSS lookups if we are PID1 */
df0ff127 385 if (getpid_cached() == 1)
c465a29f
FS
386 return streq(c->parameter, "root");
387
388 return in_group(c->parameter) > 0;
389}
390
a4705396 391static int condition_test_virtualization(Condition *c) {
248fab74 392 int b, v;
b77c08e0
TG
393
394 assert(c);
395 assert(c->parameter);
396 assert(c->type == CONDITION_VIRTUALIZATION);
397
239a5707
ZJS
398 if (streq(c->parameter, "private-users"))
399 return running_in_userns();
400
75f86906 401 v = detect_virtualization();
592fd144
LP
402 if (v < 0)
403 return v;
b77c08e0
TG
404
405 /* First, compare with yes/no */
406 b = parse_boolean(c->parameter);
0809d774
ZJS
407 if (b >= 0)
408 return b == !!v;
b77c08e0
TG
409
410 /* Then, compare categorization */
0809d774
ZJS
411 if (streq(c->parameter, "vm"))
412 return VIRTUALIZATION_IS_VM(v);
b77c08e0 413
0809d774
ZJS
414 if (streq(c->parameter, "container"))
415 return VIRTUALIZATION_IS_CONTAINER(v);
b77c08e0
TG
416
417 /* Finally compare id */
75f86906 418 return v != VIRTUALIZATION_NONE && streq(c->parameter, virtualization_to_string(v));
b77c08e0
TG
419}
420
a4705396 421static int condition_test_architecture(Condition *c) {
592fd144 422 int a, b;
099524d7
LP
423
424 assert(c);
425 assert(c->parameter);
426 assert(c->type == CONDITION_ARCHITECTURE);
427
428 a = uname_architecture();
429 if (a < 0)
592fd144 430 return a;
099524d7
LP
431
432 if (streq(c->parameter, "native"))
433 b = native_architecture();
2cb62395 434 else {
099524d7 435 b = architecture_from_string(c->parameter);
2cb62395
LP
436 if (b < 0) /* unknown architecture? Then it's definitely not ours */
437 return false;
438 }
099524d7 439
a4705396 440 return a == b;
099524d7
LP
441}
442
a4705396 443static int condition_test_host(Condition *c) {
dc92e62c 444 _cleanup_free_ char *h = NULL;
b77c08e0 445 sd_id128_t x, y;
b77c08e0 446 int r;
b77c08e0
TG
447
448 assert(c);
449 assert(c->parameter);
450 assert(c->type == CONDITION_HOST);
451
452 if (sd_id128_from_string(c->parameter, &x) >= 0) {
453
454 r = sd_id128_get_machine(&y);
455 if (r < 0)
592fd144 456 return r;
b77c08e0 457
a4705396 458 return sd_id128_equal(x, y);
b77c08e0
TG
459 }
460
461 h = gethostname_malloc();
462 if (!h)
592fd144 463 return -ENOMEM;
b77c08e0 464
a4705396 465 return fnmatch(c->parameter, h, FNM_CASEFOLD) == 0;
b77c08e0
TG
466}
467
a4705396 468static int condition_test_ac_power(Condition *c) {
b77c08e0
TG
469 int r;
470
471 assert(c);
472 assert(c->parameter);
473 assert(c->type == CONDITION_AC_POWER);
474
475 r = parse_boolean(c->parameter);
476 if (r < 0)
592fd144 477 return r;
b77c08e0 478
a4705396 479 return (on_ac_power() != 0) == !!r;
b77c08e0
TG
480}
481
d1bddcec
LP
482static int condition_test_security(Condition *c) {
483 assert(c);
484 assert(c->parameter);
485 assert(c->type == CONDITION_SECURITY);
486
487 if (streq(c->parameter, "selinux"))
6d395665 488 return mac_selinux_use();
d1bddcec 489 if (streq(c->parameter, "smack"))
a4705396 490 return mac_smack_use();
d1bddcec 491 if (streq(c->parameter, "apparmor"))
a4705396 492 return mac_apparmor_use();
d1bddcec 493 if (streq(c->parameter, "audit"))
a4705396 494 return use_audit();
d1bddcec 495 if (streq(c->parameter, "ima"))
a4705396 496 return use_ima();
ed440f6b
SL
497 if (streq(c->parameter, "tomoyo"))
498 return mac_tomoyo_use();
be405b90
LP
499 if (streq(c->parameter, "uefi-secureboot"))
500 return is_efi_secure_boot();
d1bddcec 501
a4705396 502 return false;
d1bddcec
LP
503}
504
505static int condition_test_capability(Condition *c) {
9c6f9786 506 unsigned long long capabilities = (unsigned long long) -1;
d1bddcec 507 _cleanup_fclose_ FILE *f = NULL;
9c6f9786 508 int value, r;
d1bddcec
LP
509
510 assert(c);
511 assert(c->parameter);
512 assert(c->type == CONDITION_CAPABILITY);
513
514 /* If it's an invalid capability, we don't have it */
2822da4f
LP
515 value = capability_from_name(c->parameter);
516 if (value < 0)
d1bddcec
LP
517 return -EINVAL;
518
519 /* If it's a valid capability we default to assume
520 * that we have it */
521
522 f = fopen("/proc/self/status", "re");
523 if (!f)
524 return -errno;
525
9c6f9786
LP
526 for (;;) {
527 _cleanup_free_ char *line = NULL;
528 const char *p;
529
530 r = read_line(f, LONG_LINE_MAX, &line);
531 if (r < 0)
532 return r;
533 if (r == 0)
534 break;
535
536 p = startswith(line, "CapBnd:");
537 if (p) {
538 if (sscanf(line+7, "%llx", &capabilities) != 1)
539 return -EIO;
d1bddcec 540
d1bddcec
LP
541 break;
542 }
543 }
544
a4705396 545 return !!(capabilities & (1ULL << value));
d1bddcec
LP
546}
547
548static int condition_test_needs_update(Condition *c) {
549 const char *p;
550 struct stat usr, other;
551
552 assert(c);
553 assert(c->parameter);
554 assert(c->type == CONDITION_NEEDS_UPDATE);
555
556 /* If the file system is read-only we shouldn't suggest an update */
557 if (path_is_read_only_fs(c->parameter) > 0)
a4705396 558 return false;
d1bddcec
LP
559
560 /* Any other failure means we should allow the condition to be true,
96d49011 561 * so that we rather invoke too many update tools than too
d1bddcec
LP
562 * few. */
563
564 if (!path_is_absolute(c->parameter))
a4705396 565 return true;
d1bddcec 566
63c372cb 567 p = strjoina(c->parameter, "/.updated");
d1bddcec 568 if (lstat(p, &other) < 0)
a4705396 569 return true;
d1bddcec
LP
570
571 if (lstat("/usr/", &usr) < 0)
a4705396 572 return true;
d1bddcec 573
fb8b0869
IS
574 /*
575 * First, compare seconds as they are always accurate...
576 */
577 if (usr.st_mtim.tv_sec != other.st_mtim.tv_sec)
578 return usr.st_mtim.tv_sec > other.st_mtim.tv_sec;
579
580 /*
581 * ...then compare nanoseconds.
582 *
583 * A false positive is only possible when /usr's nanoseconds > 0
584 * (otherwise /usr cannot be strictly newer than the target file)
585 * AND the target file's nanoseconds == 0
586 * (otherwise the filesystem supports nsec timestamps, see stat(2)).
587 */
588 if (usr.st_mtim.tv_nsec > 0 && other.st_mtim.tv_nsec == 0) {
589 _cleanup_free_ char *timestamp_str = NULL;
590 uint64_t timestamp;
591 int r;
592
13df9c39 593 r = parse_env_file(NULL, p, "TIMESTAMP_NSEC", &timestamp_str);
fb8b0869 594 if (r < 0) {
ec2ebfd5 595 log_error_errno(r, "Failed to parse timestamp file '%s', using mtime: %m", p);
fb8b0869
IS
596 return true;
597 } else if (r == 0) {
598 log_debug("No data in timestamp file '%s', using mtime", p);
599 return true;
600 }
601
602 r = safe_atou64(timestamp_str, &timestamp);
603 if (r < 0) {
ec2ebfd5 604 log_error_errno(r, "Failed to parse timestamp value '%s' in file '%s', using mtime: %m", timestamp_str, p);
fb8b0869
IS
605 return true;
606 }
607
ec2ebfd5 608 timespec_store(&other.st_mtim, timestamp);
fb8b0869
IS
609 }
610
611 return usr.st_mtim.tv_nsec > other.st_mtim.tv_nsec;
d1bddcec
LP
612}
613
614static int condition_test_first_boot(Condition *c) {
615 int r;
616
617 assert(c);
618 assert(c->parameter);
619 assert(c->type == CONDITION_FIRST_BOOT);
620
621 r = parse_boolean(c->parameter);
622 if (r < 0)
623 return r;
624
a4705396 625 return (access("/run/systemd/first-boot", F_OK) >= 0) == !!r;
d1bddcec
LP
626}
627
628static int condition_test_path_exists(Condition *c) {
629 assert(c);
630 assert(c->parameter);
631 assert(c->type == CONDITION_PATH_EXISTS);
632
a4705396 633 return access(c->parameter, F_OK) >= 0;
d1bddcec
LP
634}
635
636static int condition_test_path_exists_glob(Condition *c) {
637 assert(c);
638 assert(c->parameter);
639 assert(c->type == CONDITION_PATH_EXISTS_GLOB);
640
a4705396 641 return glob_exists(c->parameter) > 0;
d1bddcec
LP
642}
643
644static int condition_test_path_is_directory(Condition *c) {
645 assert(c);
646 assert(c->parameter);
647 assert(c->type == CONDITION_PATH_IS_DIRECTORY);
648
a4705396 649 return is_dir(c->parameter, true) > 0;
d1bddcec
LP
650}
651
652static int condition_test_path_is_symbolic_link(Condition *c) {
653 assert(c);
654 assert(c->parameter);
655 assert(c->type == CONDITION_PATH_IS_SYMBOLIC_LINK);
656
a4705396 657 return is_symlink(c->parameter) > 0;
d1bddcec
LP
658}
659
660static int condition_test_path_is_mount_point(Condition *c) {
661 assert(c);
662 assert(c->parameter);
663 assert(c->type == CONDITION_PATH_IS_MOUNT_POINT);
664
e1873695 665 return path_is_mount_point(c->parameter, NULL, AT_SYMLINK_FOLLOW) > 0;
d1bddcec
LP
666}
667
668static int condition_test_path_is_read_write(Condition *c) {
669 assert(c);
670 assert(c->parameter);
671 assert(c->type == CONDITION_PATH_IS_READ_WRITE);
672
a4705396 673 return path_is_read_only_fs(c->parameter) <= 0;
d1bddcec
LP
674}
675
676static int condition_test_directory_not_empty(Condition *c) {
677 int r;
678
679 assert(c);
680 assert(c->parameter);
681 assert(c->type == CONDITION_DIRECTORY_NOT_EMPTY);
682
683 r = dir_is_empty(c->parameter);
a4705396 684 return r <= 0 && r != -ENOENT;
d1bddcec
LP
685}
686
687static int condition_test_file_not_empty(Condition *c) {
688 struct stat st;
689
690 assert(c);
691 assert(c->parameter);
692 assert(c->type == CONDITION_FILE_NOT_EMPTY);
693
694 return (stat(c->parameter, &st) >= 0 &&
695 S_ISREG(st.st_mode) &&
a4705396 696 st.st_size > 0);
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LP
697}
698
699static int condition_test_file_is_executable(Condition *c) {
700 struct stat st;
701
702 assert(c);
703 assert(c->parameter);
704 assert(c->type == CONDITION_FILE_IS_EXECUTABLE);
705
706 return (stat(c->parameter, &st) >= 0 &&
707 S_ISREG(st.st_mode) &&
a4705396 708 (st.st_mode & 0111));
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LP
709}
710
711static int condition_test_null(Condition *c) {
712 assert(c);
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LP
713 assert(c->type == CONDITION_NULL);
714
715 /* Note that during parsing we already evaluate the string and
716 * store it in c->negate */
a4705396 717 return true;
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LP
718}
719
720int condition_test(Condition *c) {
721
722 static int (*const condition_tests[_CONDITION_TYPE_MAX])(Condition *c) = {
cae90de3
ZJS
723 [CONDITION_PATH_EXISTS] = condition_test_path_exists,
724 [CONDITION_PATH_EXISTS_GLOB] = condition_test_path_exists_glob,
725 [CONDITION_PATH_IS_DIRECTORY] = condition_test_path_is_directory,
726 [CONDITION_PATH_IS_SYMBOLIC_LINK] = condition_test_path_is_symbolic_link,
727 [CONDITION_PATH_IS_MOUNT_POINT] = condition_test_path_is_mount_point,
728 [CONDITION_PATH_IS_READ_WRITE] = condition_test_path_is_read_write,
729 [CONDITION_DIRECTORY_NOT_EMPTY] = condition_test_directory_not_empty,
730 [CONDITION_FILE_NOT_EMPTY] = condition_test_file_not_empty,
731 [CONDITION_FILE_IS_EXECUTABLE] = condition_test_file_is_executable,
732 [CONDITION_KERNEL_COMMAND_LINE] = condition_test_kernel_command_line,
733 [CONDITION_KERNEL_VERSION] = condition_test_kernel_version,
734 [CONDITION_VIRTUALIZATION] = condition_test_virtualization,
735 [CONDITION_SECURITY] = condition_test_security,
736 [CONDITION_CAPABILITY] = condition_test_capability,
737 [CONDITION_HOST] = condition_test_host,
738 [CONDITION_AC_POWER] = condition_test_ac_power,
739 [CONDITION_ARCHITECTURE] = condition_test_architecture,
740 [CONDITION_NEEDS_UPDATE] = condition_test_needs_update,
741 [CONDITION_FIRST_BOOT] = condition_test_first_boot,
742 [CONDITION_USER] = condition_test_user,
743 [CONDITION_GROUP] = condition_test_group,
e16647c3 744 [CONDITION_CONTROL_GROUP_CONTROLLER] = condition_test_control_group_controller,
cae90de3
ZJS
745 [CONDITION_NULL] = condition_test_null,
746 [CONDITION_CPUS] = condition_test_cpus,
747 [CONDITION_MEMORY] = condition_test_memory,
d1bddcec 748 };
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LP
749
750 int r, b;
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LP
751
752 assert(c);
753 assert(c->type >= 0);
754 assert(c->type < _CONDITION_TYPE_MAX);
755
a4705396 756 r = condition_tests[c->type](c);
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LP
757 if (r < 0) {
758 c->result = CONDITION_ERROR;
a4705396 759 return r;
cc50ef13 760 }
a4705396 761
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LP
762 b = (r > 0) == !c->negate;
763 c->result = b ? CONDITION_SUCCEEDED : CONDITION_FAILED;
764 return b;
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LP
765}
766
828fa610
YW
767bool condition_test_list(Condition *first, const char *(*to_string)(ConditionType t), condition_test_logger_t logger, void *userdata) {
768 Condition *c;
769 int triggered = -1;
770
771 assert(!!logger == !!to_string);
772
773 /* If the condition list is empty, then it is true */
774 if (!first)
775 return true;
776
777 /* Otherwise, if all of the non-trigger conditions apply and
778 * if any of the trigger conditions apply (unless there are
779 * none) we return true */
780 LIST_FOREACH(conditions, c, first) {
781 int r;
782
783 r = condition_test(c);
784
785 if (logger) {
e3b52014
ZJS
786 const char *p = c->type == CONDITION_NULL ? "true" : c->parameter;
787 assert(p);
788
828fa610 789 if (r < 0)
62c6bbbc 790 logger(userdata, LOG_WARNING, r, PROJECT_FILE, __LINE__, __func__,
828fa610
YW
791 "Couldn't determine result for %s=%s%s%s, assuming failed: %m",
792 to_string(c->type),
793 c->trigger ? "|" : "",
794 c->negate ? "!" : "",
e3b52014 795 p);
828fa610 796 else
62c6bbbc 797 logger(userdata, LOG_DEBUG, 0, PROJECT_FILE, __LINE__, __func__,
828fa610
YW
798 "%s=%s%s%s %s.",
799 to_string(c->type),
800 c->trigger ? "|" : "",
801 c->negate ? "!" : "",
e3b52014 802 p,
828fa610
YW
803 condition_result_to_string(c->result));
804 }
805
806 if (!c->trigger && r <= 0)
807 return false;
808
809 if (c->trigger && triggered <= 0)
810 triggered = r > 0;
811 }
812
813 return triggered != 0;
814}
815
59fccdc5 816void condition_dump(Condition *c, FILE *f, const char *prefix, const char *(*to_string)(ConditionType t)) {
b77c08e0
TG
817 assert(c);
818 assert(f);
819
ad5d4b17 820 prefix = strempty(prefix);
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TG
821
822 fprintf(f,
823 "%s\t%s: %s%s%s %s\n",
824 prefix,
59fccdc5 825 to_string(c->type),
b77c08e0
TG
826 c->trigger ? "|" : "",
827 c->negate ? "!" : "",
828 c->parameter,
cc50ef13 829 condition_result_to_string(c->result));
b77c08e0
TG
830}
831
59fccdc5 832void condition_dump_list(Condition *first, FILE *f, const char *prefix, const char *(*to_string)(ConditionType t)) {
b77c08e0
TG
833 Condition *c;
834
835 LIST_FOREACH(conditions, c, first)
59fccdc5 836 condition_dump(c, f, prefix, to_string);
b77c08e0
TG
837}
838
839static const char* const condition_type_table[_CONDITION_TYPE_MAX] = {
651c3318
LP
840 [CONDITION_ARCHITECTURE] = "ConditionArchitecture",
841 [CONDITION_VIRTUALIZATION] = "ConditionVirtualization",
842 [CONDITION_HOST] = "ConditionHost",
843 [CONDITION_KERNEL_COMMAND_LINE] = "ConditionKernelCommandLine",
5022f08a 844 [CONDITION_KERNEL_VERSION] = "ConditionKernelVersion",
651c3318
LP
845 [CONDITION_SECURITY] = "ConditionSecurity",
846 [CONDITION_CAPABILITY] = "ConditionCapability",
847 [CONDITION_AC_POWER] = "ConditionACPower",
848 [CONDITION_NEEDS_UPDATE] = "ConditionNeedsUpdate",
849 [CONDITION_FIRST_BOOT] = "ConditionFirstBoot",
b77c08e0
TG
850 [CONDITION_PATH_EXISTS] = "ConditionPathExists",
851 [CONDITION_PATH_EXISTS_GLOB] = "ConditionPathExistsGlob",
852 [CONDITION_PATH_IS_DIRECTORY] = "ConditionPathIsDirectory",
853 [CONDITION_PATH_IS_SYMBOLIC_LINK] = "ConditionPathIsSymbolicLink",
854 [CONDITION_PATH_IS_MOUNT_POINT] = "ConditionPathIsMountPoint",
855 [CONDITION_PATH_IS_READ_WRITE] = "ConditionPathIsReadWrite",
856 [CONDITION_DIRECTORY_NOT_EMPTY] = "ConditionDirectoryNotEmpty",
857 [CONDITION_FILE_NOT_EMPTY] = "ConditionFileNotEmpty",
858 [CONDITION_FILE_IS_EXECUTABLE] = "ConditionFileIsExecutable",
c465a29f
FS
859 [CONDITION_USER] = "ConditionUser",
860 [CONDITION_GROUP] = "ConditionGroup",
e16647c3 861 [CONDITION_CONTROL_GROUP_CONTROLLER] = "ConditionControlGroupController",
754f719a
LP
862 [CONDITION_NULL] = "ConditionNull",
863 [CONDITION_CPUS] = "ConditionCPUs",
864 [CONDITION_MEMORY] = "ConditionMemory",
b77c08e0
TG
865};
866
867DEFINE_STRING_TABLE_LOOKUP(condition_type, ConditionType);
cc50ef13 868
59fccdc5 869static const char* const assert_type_table[_CONDITION_TYPE_MAX] = {
651c3318
LP
870 [CONDITION_ARCHITECTURE] = "AssertArchitecture",
871 [CONDITION_VIRTUALIZATION] = "AssertVirtualization",
872 [CONDITION_HOST] = "AssertHost",
873 [CONDITION_KERNEL_COMMAND_LINE] = "AssertKernelCommandLine",
5022f08a 874 [CONDITION_KERNEL_VERSION] = "AssertKernelVersion",
651c3318
LP
875 [CONDITION_SECURITY] = "AssertSecurity",
876 [CONDITION_CAPABILITY] = "AssertCapability",
877 [CONDITION_AC_POWER] = "AssertACPower",
878 [CONDITION_NEEDS_UPDATE] = "AssertNeedsUpdate",
879 [CONDITION_FIRST_BOOT] = "AssertFirstBoot",
59fccdc5
LP
880 [CONDITION_PATH_EXISTS] = "AssertPathExists",
881 [CONDITION_PATH_EXISTS_GLOB] = "AssertPathExistsGlob",
882 [CONDITION_PATH_IS_DIRECTORY] = "AssertPathIsDirectory",
883 [CONDITION_PATH_IS_SYMBOLIC_LINK] = "AssertPathIsSymbolicLink",
884 [CONDITION_PATH_IS_MOUNT_POINT] = "AssertPathIsMountPoint",
885 [CONDITION_PATH_IS_READ_WRITE] = "AssertPathIsReadWrite",
886 [CONDITION_DIRECTORY_NOT_EMPTY] = "AssertDirectoryNotEmpty",
887 [CONDITION_FILE_NOT_EMPTY] = "AssertFileNotEmpty",
888 [CONDITION_FILE_IS_EXECUTABLE] = "AssertFileIsExecutable",
c465a29f
FS
889 [CONDITION_USER] = "AssertUser",
890 [CONDITION_GROUP] = "AssertGroup",
e16647c3 891 [CONDITION_CONTROL_GROUP_CONTROLLER] = "AssertControlGroupController",
754f719a
LP
892 [CONDITION_NULL] = "AssertNull",
893 [CONDITION_CPUS] = "AssertCPUs",
894 [CONDITION_MEMORY] = "AssertMemory",
59fccdc5
LP
895};
896
897DEFINE_STRING_TABLE_LOOKUP(assert_type, ConditionType);
898
cc50ef13
LP
899static const char* const condition_result_table[_CONDITION_RESULT_MAX] = {
900 [CONDITION_UNTESTED] = "untested",
901 [CONDITION_SUCCEEDED] = "succeeded",
902 [CONDITION_FAILED] = "failed",
903 [CONDITION_ERROR] = "error",
904};
905
906DEFINE_STRING_TABLE_LOOKUP(condition_result, ConditionResult);