src/shared/condition.c

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