src/load-fragment.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <linux/oom.h>
  23 #include <assert.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <sched.h>
  29 #include <sys/prctl.h>
  30 #include <sys/mount.h>
  31 #include <linux/fs.h>
  32 #include <sys/stat.h>
  33
  34 #include "unit.h"
  35 #include "strv.h"
  36 #include "conf-parser.h"
  37 #include "load-fragment.h"
  38 #include "log.h"
  39 #include "ioprio.h"
  40 #include "securebits.h"
  41 #include "missing.h"
  42 #include "unit-name.h"
  43 #include "bus-errors.h"
  44
  45 #define COMMENTS "#;\n"
  46
  47 static int config_parse_deps(
  48                 const char *filename,
  49                 unsigned line,
  50                 const char *section,
  51                 const char *lvalue,
  52                 const char *rvalue,
  53                 void *data,
  54                 void *userdata) {
  55
  56         UnitDependency d = PTR_TO_UINT(data);
  57         Unit *u = userdata;
  58         char *w;
  59         size_t l;
  60         char *state;
  61
  62         assert(filename);
  63         assert(lvalue);
  64         assert(rvalue);
  65
  66         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
  67                 char *t, *k;
  68                 int r;
  69
  70                 if (!(t = strndup(w, l)))
  71                         return -ENOMEM;
  72
  73                 k = unit_name_printf(u, t);
  74                 free(t);
  75
  76                 if (!k)
  77                         return -ENOMEM;
  78
  79                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
  80                 free(k);
  81
  82                 if (r < 0)
  83                         return r;
  84         }
  85
  86         return 0;
  87 }
  88
  89 static int config_parse_names(
  90                 const char *filename,
  91                 unsigned line,
  92                 const char *section,
  93                 const char *lvalue,
  94                 const char *rvalue,
  95                 void *data,
  96                 void *userdata) {
  97
  98         Unit *u = userdata;
  99         char *w;
 100         size_t l;
 101         char *state;
 102
 103         assert(filename);
 104         assert(lvalue);
 105         assert(rvalue);
 106         assert(data);
 107
 108         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 109                 char *t, *k;
 110                 int r;
 111
 112                 if (!(t = strndup(w, l)))
 113                         return -ENOMEM;
 114
 115                 k = unit_name_printf(u, t);
 116                 free(t);
 117
 118                 if (!k)
 119                         return -ENOMEM;
 120
 121                 r = unit_merge_by_name(u, k);
 122                 free(k);
 123
 124                 if (r < 0)
 125                         return r;
 126         }
 127
 128         return 0;
 129 }
 130
 131 static int config_parse_string_printf(
 132                 const char *filename,
 133                 unsigned line,
 134                 const char *section,
 135                 const char *lvalue,
 136                 const char *rvalue,
 137                 void *data,
 138                 void *userdata) {
 139
 140         Unit *u = userdata;
 141         char **s = data;
 142         char *k;
 143
 144         assert(filename);
 145         assert(lvalue);
 146         assert(rvalue);
 147         assert(s);
 148         assert(u);
 149
 150         if (!(k = unit_full_printf(u, rvalue)))
 151                 return -ENOMEM;
 152
 153         free(*s);
 154         if (*k)
 155                 *s = k;
 156         else {
 157                 free(k);
 158                 *s = NULL;
 159         }
 160
 161         return 0;
 162 }
 163
 164 static int config_parse_listen(
 165                 const char *filename,
 166                 unsigned line,
 167                 const char *section,
 168                 const char *lvalue,
 169                 const char *rvalue,
 170                 void *data,
 171                 void *userdata) {
 172
 173         int r;
 174         SocketPort *p;
 175         Socket *s;
 176
 177         assert(filename);
 178         assert(lvalue);
 179         assert(rvalue);
 180         assert(data);
 181
 182         s = (Socket*) data;
 183
 184         if (!(p = new0(SocketPort, 1)))
 185                 return -ENOMEM;
 186
 187         if (streq(lvalue, "ListenFIFO")) {
 188                 p->type = SOCKET_FIFO;
 189
 190                 if (!(p->path = strdup(rvalue))) {
 191                         free(p);
 192                         return -ENOMEM;
 193                 }
 194
 195                 path_kill_slashes(p->path);
 196         } else {
 197                 p->type = SOCKET_SOCKET;
 198
 199                 if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
 200                         log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
 201                         free(p);
 202                         return r;
 203                 }
 204
 205                 if (streq(lvalue, "ListenStream"))
 206                         p->address.type = SOCK_STREAM;
 207                 else if (streq(lvalue, "ListenDatagram"))
 208                         p->address.type = SOCK_DGRAM;
 209                 else {
 210                         assert(streq(lvalue, "ListenSequentialPacket"));
 211                         p->address.type = SOCK_SEQPACKET;
 212                 }
 213
 214                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
 215                         free(p);
 216                         return -EPROTONOSUPPORT;
 217                 }
 218         }
 219
 220         p->fd = -1;
 221         LIST_PREPEND(SocketPort, port, s->ports, p);
 222
 223         return 0;
 224 }
 225
 226 static int config_parse_socket_bind(
 227                 const char *filename,
 228                 unsigned line,
 229                 const char *section,
 230                 const char *lvalue,
 231                 const char *rvalue,
 232                 void *data,
 233                 void *userdata) {
 234
 235         Socket *s;
 236         SocketAddressBindIPv6Only b;
 237
 238         assert(filename);
 239         assert(lvalue);
 240         assert(rvalue);
 241         assert(data);
 242
 243         s = (Socket*) data;
 244
 245         if ((b = socket_address_bind_ipv6_only_from_string(rvalue)) < 0) {
 246                 int r;
 247
 248                 if ((r = parse_boolean(rvalue)) < 0) {
 249                         log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
 250                         return -EBADMSG;
 251                 }
 252
 253                 s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
 254         } else
 255                 s->bind_ipv6_only = b;
 256
 257         return 0;
 258 }
 259
 260 static int config_parse_nice(
 261                 const char *filename,
 262                 unsigned line,
 263                 const char *section,
 264                 const char *lvalue,
 265                 const char *rvalue,
 266                 void *data,
 267                 void *userdata) {
 268
 269         ExecContext *c = data;
 270         int priority, r;
 271
 272         assert(filename);
 273         assert(lvalue);
 274         assert(rvalue);
 275         assert(data);
 276
 277         if ((r = safe_atoi(rvalue, &priority)) < 0) {
 278                 log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
 279                 return r;
 280         }
 281
 282         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
 283                 log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
 284                 return -ERANGE;
 285         }
 286
 287         c->nice = priority;
 288         c->nice_set = false;
 289
 290         return 0;
 291 }
 292
 293 static int config_parse_oom_adjust(
 294                 const char *filename,
 295                 unsigned line,
 296                 const char *section,
 297                 const char *lvalue,
 298                 const char *rvalue,
 299                 void *data,
 300                 void *userdata) {
 301
 302         ExecContext *c = data;
 303         int oa, r;
 304
 305         assert(filename);
 306         assert(lvalue);
 307         assert(rvalue);
 308         assert(data);
 309
 310         if ((r = safe_atoi(rvalue, &oa)) < 0) {
 311                 log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
 312                 return r;
 313         }
 314
 315         if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
 316                 log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
 317                 return -ERANGE;
 318         }
 319
 320         c->oom_adjust = oa;
 321         c->oom_adjust_set = true;
 322
 323         return 0;
 324 }
 325
 326 static int config_parse_mode(
 327                 const char *filename,
 328                 unsigned line,
 329                 const char *section,
 330                 const char *lvalue,
 331                 const char *rvalue,
 332                 void *data,
 333                 void *userdata) {
 334
 335         mode_t *m = data;
 336         long l;
 337         char *x = NULL;
 338
 339         assert(filename);
 340         assert(lvalue);
 341         assert(rvalue);
 342         assert(data);
 343
 344         errno = 0;
 345         l = strtol(rvalue, &x, 8);
 346         if (!x || *x || errno) {
 347                 log_error("[%s:%u] Failed to parse mode value: %s", filename, line, rvalue);
 348                 return errno ? -errno : -EINVAL;
 349         }
 350
 351         if (l < 0000 || l > 07777) {
 352                 log_error("[%s:%u] mode value out of range: %s", filename, line, rvalue);
 353                 return -ERANGE;
 354         }
 355
 356         *m = (mode_t) l;
 357         return 0;
 358 }
 359
 360 static int config_parse_exec(
 361                 const char *filename,
 362                 unsigned line,
 363                 const char *section,
 364                 const char *lvalue,
 365                 const char *rvalue,
 366                 void *data,
 367                 void *userdata) {
 368
 369         ExecCommand **e = data, *nce;
 370         char *path, **n;
 371         unsigned k;
 372
 373         assert(filename);
 374         assert(lvalue);
 375         assert(rvalue);
 376         assert(e);
 377
 378         /* We accept an absolute path as first argument, or
 379          * alternatively an absolute prefixed with @ to allow
 380          * overriding of argv[0]. */
 381
 382         for (;;) {
 383                 char *w;
 384                 size_t l;
 385                 char *state;
 386                 bool honour_argv0 = false, ignore = false;
 387
 388                 path = NULL;
 389                 nce = NULL;
 390                 n = NULL;
 391
 392                 rvalue += strspn(rvalue, WHITESPACE);
 393
 394                 if (rvalue[0] == 0)
 395                         break;
 396
 397                 if (rvalue[0] == '-') {
 398                         ignore = true;
 399                         rvalue ++;
 400                 }
 401
 402                 if (rvalue[0] == '@') {
 403                         honour_argv0 = true;
 404                         rvalue ++;
 405                 }
 406
 407                 if (*rvalue != '/') {
 408                         log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
 409                         return -EINVAL;
 410                 }
 411
 412                 k = 0;
 413                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 414                         if (strncmp(w, ";", l) == 0)
 415                                 break;
 416
 417                         k++;
 418                 }
 419
 420                 if (!(n = new(char*, k + !honour_argv0)))
 421                         return -ENOMEM;
 422
 423                 k = 0;
 424                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 425                         if (strncmp(w, ";", l) == 0)
 426                                 break;
 427
 428                         if (honour_argv0 && w == rvalue) {
 429                                 assert(!path);
 430                                 if (!(path = cunescape_length(w, l)))
 431                                         goto fail;
 432                         } else {
 433                                 if (!(n[k++] = cunescape_length(w, l)))
 434                                         goto fail;
 435                         }
 436                 }
 437
 438                 n[k] = NULL;
 439
 440                 if (!n[0]) {
 441                         log_error("[%s:%u] Invalid command line: %s", filename, line, rvalue);
 442                         strv_free(n);
 443                         return -EINVAL;
 444                 }
 445
 446                 if (!path)
 447                         if (!(path = strdup(n[0])))
 448                                 goto fail;
 449
 450                 assert(path_is_absolute(path));
 451
 452                 if (!(nce = new0(ExecCommand, 1)))
 453                         goto fail;
 454
 455                 nce->argv = n;
 456                 nce->path = path;
 457                 nce->ignore = ignore;
 458
 459                 path_kill_slashes(nce->path);
 460
 461                 exec_command_append_list(e, nce);
 462
 463                 rvalue = state;
 464         }
 465
 466         return 0;
 467
 468 fail:
 469         n[k] = NULL;
 470         strv_free(n);
 471         free(path);
 472         free(nce);
 473
 474         return -ENOMEM;
 475 }
 476
 477 static int config_parse_usec(
 478                 const char *filename,
 479                 unsigned line,
 480                 const char *section,
 481                 const char *lvalue,
 482                 const char *rvalue,
 483                 void *data,
 484                 void *userdata) {
 485
 486         usec_t *usec = data;
 487         int r;
 488
 489         assert(filename);
 490         assert(lvalue);
 491         assert(rvalue);
 492         assert(data);
 493
 494         if ((r = parse_usec(rvalue, usec)) < 0) {
 495                 log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
 496                 return r;
 497         }
 498
 499         return 0;
 500 }
 501
 502 static DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 503 static DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 504
 505 static int config_parse_bindtodevice(
 506                 const char *filename,
 507                 unsigned line,
 508                 const char *section,
 509                 const char *lvalue,
 510                 const char *rvalue,
 511                 void *data,
 512                 void *userdata) {
 513
 514         Socket *s = data;
 515         char *n;
 516
 517         assert(filename);
 518         assert(lvalue);
 519         assert(rvalue);
 520         assert(data);
 521
 522         if (rvalue[0] && !streq(rvalue, "*")) {
 523                 if (!(n = strdup(rvalue)))
 524                         return -ENOMEM;
 525         } else
 526                 n = NULL;
 527
 528         free(s->bind_to_device);
 529         s->bind_to_device = n;
 530
 531         return 0;
 532 }
 533
 534 static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 535 static DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 536
 537 static int config_parse_facility(
 538                 const char *filename,
 539                 unsigned line,
 540                 const char *section,
 541                 const char *lvalue,
 542                 const char *rvalue,
 543                 void *data,
 544                 void *userdata) {
 545
 546
 547         int *o = data, x;
 548
 549         assert(filename);
 550         assert(lvalue);
 551         assert(rvalue);
 552         assert(data);
 553
 554         if ((x = log_facility_from_string(rvalue)) < 0) {
 555                 log_error("[%s:%u] Failed to parse log facility: %s", filename, line, rvalue);
 556                 return -EBADMSG;
 557         }
 558
 559         *o = LOG_MAKEPRI(x, LOG_PRI(*o));
 560
 561         return 0;
 562 }
 563
 564 static int config_parse_level(
 565                 const char *filename,
 566                 unsigned line,
 567                 const char *section,
 568                 const char *lvalue,
 569                 const char *rvalue,
 570                 void *data,
 571                 void *userdata) {
 572
 573
 574         int *o = data, x;
 575
 576         assert(filename);
 577         assert(lvalue);
 578         assert(rvalue);
 579         assert(data);
 580
 581         if ((x = log_level_from_string(rvalue)) < 0) {
 582                 log_error("[%s:%u] Failed to parse log level: %s", filename, line, rvalue);
 583                 return -EBADMSG;
 584         }
 585
 586         *o = LOG_MAKEPRI(LOG_FAC(*o), x);
 587         return 0;
 588 }
 589
 590 static int config_parse_io_class(
 591                 const char *filename,
 592                 unsigned line,
 593                 const char *section,
 594                 const char *lvalue,
 595                 const char *rvalue,
 596                 void *data,
 597                 void *userdata) {
 598
 599         ExecContext *c = data;
 600         int x;
 601
 602         assert(filename);
 603         assert(lvalue);
 604         assert(rvalue);
 605         assert(data);
 606
 607         if ((x = ioprio_class_from_string(rvalue)) < 0) {
 608                 log_error("[%s:%u] Failed to parse IO scheduling class: %s", filename, line, rvalue);
 609                 return -EBADMSG;
 610         }
 611
 612         c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
 613         c->ioprio_set = true;
 614
 615         return 0;
 616 }
 617
 618 static int config_parse_io_priority(
 619                 const char *filename,
 620                 unsigned line,
 621                 const char *section,
 622                 const char *lvalue,
 623                 const char *rvalue,
 624                 void *data,
 625                 void *userdata) {
 626
 627         ExecContext *c = data;
 628         int i;
 629
 630         assert(filename);
 631         assert(lvalue);
 632         assert(rvalue);
 633         assert(data);
 634
 635         if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
 636                 log_error("[%s:%u] Failed to parse io priority: %s", filename, line, rvalue);
 637                 return -EBADMSG;
 638         }
 639
 640         c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
 641         c->ioprio_set = true;
 642
 643         return 0;
 644 }
 645
 646 static int config_parse_cpu_sched_policy(
 647                 const char *filename,
 648                 unsigned line,
 649                 const char *section,
 650                 const char *lvalue,
 651                 const char *rvalue,
 652                 void *data,
 653                 void *userdata) {
 654
 655
 656         ExecContext *c = data;
 657         int x;
 658
 659         assert(filename);
 660         assert(lvalue);
 661         assert(rvalue);
 662         assert(data);
 663
 664         if ((x = sched_policy_from_string(rvalue)) < 0) {
 665                 log_error("[%s:%u] Failed to parse CPU scheduling policy: %s", filename, line, rvalue);
 666                 return -EBADMSG;
 667         }
 668
 669         c->cpu_sched_policy = x;
 670         c->cpu_sched_set = true;
 671
 672         return 0;
 673 }
 674
 675 static int config_parse_cpu_sched_prio(
 676                 const char *filename,
 677                 unsigned line,
 678                 const char *section,
 679                 const char *lvalue,
 680                 const char *rvalue,
 681                 void *data,
 682                 void *userdata) {
 683
 684         ExecContext *c = data;
 685         int i;
 686
 687         assert(filename);
 688         assert(lvalue);
 689         assert(rvalue);
 690         assert(data);
 691
 692         /* On Linux RR/FIFO have the same range */
 693         if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
 694                 log_error("[%s:%u] Failed to parse CPU scheduling priority: %s", filename, line, rvalue);
 695                 return -EBADMSG;
 696         }
 697
 698         c->cpu_sched_priority = i;
 699         c->cpu_sched_set = true;
 700
 701         return 0;
 702 }
 703
 704 static int config_parse_cpu_affinity(
 705                 const char *filename,
 706                 unsigned line,
 707                 const char *section,
 708                 const char *lvalue,
 709                 const char *rvalue,
 710                 void *data,
 711                 void *userdata) {
 712
 713         ExecContext *c = data;
 714         char *w;
 715         size_t l;
 716         char *state;
 717
 718         assert(filename);
 719         assert(lvalue);
 720         assert(rvalue);
 721         assert(data);
 722
 723         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 724                 char *t;
 725                 int r;
 726                 unsigned cpu;
 727
 728                 if (!(t = strndup(w, l)))
 729                         return -ENOMEM;
 730
 731                 r = safe_atou(t, &cpu);
 732                 free(t);
 733
 734                 if (!(c->cpuset))
 735                         if (!(c->cpuset = cpu_set_malloc(&c->cpuset_ncpus)))
 736                                 return -ENOMEM;
 737
 738                 if (r < 0 || cpu >= c->cpuset_ncpus) {
 739                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 740                         return -EBADMSG;
 741                 }
 742
 743                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset);
 744         }
 745
 746         return 0;
 747 }
 748
 749 static int config_parse_capabilities(
 750                 const char *filename,
 751                 unsigned line,
 752                 const char *section,
 753                 const char *lvalue,
 754                 const char *rvalue,
 755                 void *data,
 756                 void *userdata) {
 757
 758         ExecContext *c = data;
 759         cap_t cap;
 760
 761         assert(filename);
 762         assert(lvalue);
 763         assert(rvalue);
 764         assert(data);
 765
 766         if (!(cap = cap_from_text(rvalue))) {
 767                 if (errno == ENOMEM)
 768                         return -ENOMEM;
 769
 770                 log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
 771                 return -EBADMSG;
 772         }
 773
 774         if (c->capabilities)
 775                 cap_free(c->capabilities);
 776         c->capabilities = cap;
 777
 778         return 0;
 779 }
 780
 781 static int config_parse_secure_bits(
 782                 const char *filename,
 783                 unsigned line,
 784                 const char *section,
 785                 const char *lvalue,
 786                 const char *rvalue,
 787                 void *data,
 788                 void *userdata) {
 789
 790         ExecContext *c = data;
 791         char *w;
 792         size_t l;
 793         char *state;
 794
 795         assert(filename);
 796         assert(lvalue);
 797         assert(rvalue);
 798         assert(data);
 799
 800         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 801                 if (first_word(w, "keep-caps"))
 802                         c->secure_bits |= SECURE_KEEP_CAPS;
 803                 else if (first_word(w, "keep-caps-locked"))
 804                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 805                 else if (first_word(w, "no-setuid-fixup"))
 806                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 807                 else if (first_word(w, "no-setuid-fixup-locked"))
 808                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 809                 else if (first_word(w, "noroot"))
 810                         c->secure_bits |= SECURE_NOROOT;
 811                 else if (first_word(w, "noroot-locked"))
 812                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 813                 else {
 814                         log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
 815                         return -EBADMSG;
 816                 }
 817         }
 818
 819         return 0;
 820 }
 821
 822 static int config_parse_bounding_set(
 823                 const char *filename,
 824                 unsigned line,
 825                 const char *section,
 826                 const char *lvalue,
 827                 const char *rvalue,
 828                 void *data,
 829                 void *userdata) {
 830
 831         ExecContext *c = data;
 832         char *w;
 833         size_t l;
 834         char *state;
 835
 836         assert(filename);
 837         assert(lvalue);
 838         assert(rvalue);
 839         assert(data);
 840
 841         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 842                 char *t;
 843                 int r;
 844                 cap_value_t cap;
 845
 846                 if (!(t = strndup(w, l)))
 847                         return -ENOMEM;
 848
 849                 r = cap_from_name(t, &cap);
 850                 free(t);
 851
 852                 if (r < 0) {
 853                         log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
 854                         return -EBADMSG;
 855                 }
 856
 857                 c->capability_bounding_set_drop |= 1 << cap;
 858         }
 859
 860         return 0;
 861 }
 862
 863 static int config_parse_timer_slack_nsec(
 864                 const char *filename,
 865                 unsigned line,
 866                 const char *section,
 867                 const char *lvalue,
 868                 const char *rvalue,
 869                 void *data,
 870                 void *userdata) {
 871
 872         ExecContext *c = data;
 873         unsigned long u;
 874         int r;
 875
 876         assert(filename);
 877         assert(lvalue);
 878         assert(rvalue);
 879         assert(data);
 880
 881         if ((r = safe_atolu(rvalue, &u)) < 0) {
 882                 log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
 883                 return r;
 884         }
 885
 886         c->timer_slack_nsec = u;
 887
 888         return 0;
 889 }
 890
 891 static int config_parse_limit(
 892                 const char *filename,
 893                 unsigned line,
 894                 const char *section,
 895                 const char *lvalue,
 896                 const char *rvalue,
 897                 void *data,
 898                 void *userdata) {
 899
 900         struct rlimit **rl = data;
 901         unsigned long long u;
 902         int r;
 903
 904         assert(filename);
 905         assert(lvalue);
 906         assert(rvalue);
 907         assert(data);
 908
 909         if ((r = safe_atollu(rvalue, &u)) < 0) {
 910                 log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
 911                 return r;
 912         }
 913
 914         if (!*rl)
 915                 if (!(*rl = new(struct rlimit, 1)))
 916                         return -ENOMEM;
 917
 918         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
 919         return 0;
 920 }
 921
 922 static int config_parse_cgroup(
 923                 const char *filename,
 924                 unsigned line,
 925                 const char *section,
 926                 const char *lvalue,
 927                 const char *rvalue,
 928                 void *data,
 929                 void *userdata) {
 930
 931         Unit *u = userdata;
 932         char *w;
 933         size_t l;
 934         char *state;
 935
 936         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 937                 char *t;
 938                 int r;
 939
 940                 if (!(t = cunescape_length(w, l)))
 941                         return -ENOMEM;
 942
 943                 r = unit_add_cgroup_from_text(u, t);
 944                 free(t);
 945
 946                 if (r < 0)
 947                         return r;
 948         }
 949
 950         return 0;
 951 }
 952
 953 static int config_parse_sysv_priority(
 954                 const char *filename,
 955                 unsigned line,
 956                 const char *section,
 957                 const char *lvalue,
 958                 const char *rvalue,
 959                 void *data,
 960                 void *userdata) {
 961
 962         int *priority = data;
 963         int r, i;
 964
 965         assert(filename);
 966         assert(lvalue);
 967         assert(rvalue);
 968         assert(data);
 969
 970         if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
 971                 log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
 972                 return r;
 973         }
 974
 975         *priority = (int) i;
 976         return 0;
 977 }
 978
 979 static DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 980
 981 static int config_parse_kill_signal(
 982                 const char *filename,
 983                 unsigned line,
 984                 const char *section,
 985                 const char *lvalue,
 986                 const char *rvalue,
 987                 void *data,
 988                 void *userdata) {
 989
 990         int *sig = data;
 991         int r;
 992
 993         assert(filename);
 994         assert(lvalue);
 995         assert(rvalue);
 996         assert(sig);
 997
 998         if ((r = signal_from_string(rvalue)) <= 0)
 999                 if (startswith(rvalue, "SIG"))
1000                         r = signal_from_string(rvalue+3);
1001
1002         if (r <= 0) {
1003                 log_error("[%s:%u] Failed to parse kill signal: %s", filename, line, rvalue);
1004                 return -EINVAL;
1005         }
1006
1007         *sig = r;
1008         return 0;
1009 }
1010
1011 static int config_parse_mount_flags(
1012                 const char *filename,
1013                 unsigned line,
1014                 const char *section,
1015                 const char *lvalue,
1016                 const char *rvalue,
1017                 void *data,
1018                 void *userdata) {
1019
1020         ExecContext *c = data;
1021         char *w;
1022         size_t l;
1023         char *state;
1024         unsigned long flags = 0;
1025
1026         assert(filename);
1027         assert(lvalue);
1028         assert(rvalue);
1029         assert(data);
1030
1031         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
1032                 if (strncmp(w, "shared", l) == 0)
1033                         flags |= MS_SHARED;
1034                 else if (strncmp(w, "slave", l) == 0)
1035                         flags |= MS_SLAVE;
1036                 else if (strncmp(w, "private", l) == 0)
1037                         flags |= MS_PRIVATE;
1038                 else {
1039                         log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
1040                         return -EINVAL;
1041                 }
1042         }
1043
1044         c->mount_flags = flags;
1045         return 0;
1046 }
1047
1048 static int config_parse_timer(
1049                 const char *filename,
1050                 unsigned line,
1051                 const char *section,
1052                 const char *lvalue,
1053                 const char *rvalue,
1054                 void *data,
1055                 void *userdata) {
1056
1057         Timer *t = data;
1058         usec_t u;
1059         int r;
1060         TimerValue *v;
1061         TimerBase b;
1062
1063         assert(filename);
1064         assert(lvalue);
1065         assert(rvalue);
1066         assert(data);
1067
1068         if ((b = timer_base_from_string(lvalue)) < 0) {
1069                 log_error("[%s:%u] Failed to parse timer base: %s", filename, line, lvalue);
1070                 return -EINVAL;
1071         }
1072
1073         if ((r = parse_usec(rvalue, &u)) < 0) {
1074                 log_error("[%s:%u] Failed to parse timer value: %s", filename, line, rvalue);
1075                 return r;
1076         }
1077
1078         if (!(v = new0(TimerValue, 1)))
1079                 return -ENOMEM;
1080
1081         v->base = b;
1082         v->value = u;
1083
1084         LIST_PREPEND(TimerValue, value, t->values, v);
1085
1086         return 0;
1087 }
1088
1089 static int config_parse_timer_unit(
1090                 const char *filename,
1091                 unsigned line,
1092                 const char *section,
1093                 const char *lvalue,
1094                 const char *rvalue,
1095                 void *data,
1096                 void *userdata) {
1097
1098         Timer *t = data;
1099         int r;
1100         DBusError error;
1101
1102         assert(filename);
1103         assert(lvalue);
1104         assert(rvalue);
1105         assert(data);
1106
1107         dbus_error_init(&error);
1108
1109         if (endswith(rvalue, ".timer")) {
1110                 log_error("[%s:%u] Unit cannot be of type timer: %s", filename, line, rvalue);
1111                 return -EINVAL;
1112         }
1113
1114         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, NULL, &t->unit)) < 0) {
1115                 log_error("[%s:%u] Failed to load unit %s: %s", filename, line, rvalue, bus_error(&error, r));
1116                 dbus_error_free(&error);
1117                 return r;
1118         }
1119
1120         return 0;
1121 }
1122
1123 static int config_parse_path_spec(
1124                 const char *filename,
1125                 unsigned line,
1126                 const char *section,
1127                 const char *lvalue,
1128                 const char *rvalue,
1129                 void *data,
1130                 void *userdata) {
1131
1132         Path *p = data;
1133         PathSpec *s;
1134         PathType b;
1135
1136         assert(filename);
1137         assert(lvalue);
1138         assert(rvalue);
1139         assert(data);
1140
1141         if ((b = path_type_from_string(lvalue)) < 0) {
1142                 log_error("[%s:%u] Failed to parse path type: %s", filename, line, lvalue);
1143                 return -EINVAL;
1144         }
1145
1146         if (!path_is_absolute(rvalue)) {
1147                 log_error("[%s:%u] Path is not absolute: %s", filename, line, rvalue);
1148                 return -EINVAL;
1149         }
1150
1151         if (!(s = new0(PathSpec, 1)))
1152                 return -ENOMEM;
1153
1154         if (!(s->path = strdup(rvalue))) {
1155                 free(s);
1156                 return -ENOMEM;
1157         }
1158
1159         path_kill_slashes(s->path);
1160
1161         s->type = b;
1162         s->inotify_fd = -1;
1163
1164         LIST_PREPEND(PathSpec, spec, p->specs, s);
1165
1166         return 0;
1167 }
1168
1169 static int config_parse_path_unit(
1170                 const char *filename,
1171                 unsigned line,
1172                 const char *section,
1173                 const char *lvalue,
1174                 const char *rvalue,
1175                 void *data,
1176                 void *userdata) {
1177
1178         Path *t = data;
1179         int r;
1180         DBusError error;
1181
1182         assert(filename);
1183         assert(lvalue);
1184         assert(rvalue);
1185         assert(data);
1186
1187         dbus_error_init(&error);
1188
1189         if (endswith(rvalue, ".path")) {
1190                 log_error("[%s:%u] Unit cannot be of type path: %s", filename, line, rvalue);
1191                 return -EINVAL;
1192         }
1193
1194         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &error, &t->unit)) < 0) {
1195                 log_error("[%s:%u] Failed to load unit %s: %s", filename, line, rvalue, bus_error(&error, r));
1196                 dbus_error_free(&error);
1197                 return r;
1198         }
1199
1200         return 0;
1201 }
1202
1203 static int config_parse_env_file(
1204                 const char *filename,
1205                 unsigned line,
1206                 const char *section,
1207                 const char *lvalue,
1208                 const char *rvalue,
1209                 void *data,
1210                 void *userdata) {
1211
1212         FILE *f;
1213         int r;
1214         char ***env = data;
1215
1216         assert(filename);
1217         assert(lvalue);
1218         assert(rvalue);
1219         assert(data);
1220
1221         if (!(f = fopen(rvalue, "re"))) {
1222                 log_error("[%s:%u] Failed to open environment file '%s': %m", filename, line, rvalue);
1223                 return -errno;
1224         }
1225
1226         while (!feof(f)) {
1227                 char l[LINE_MAX], *p;
1228                 char **t;
1229
1230                 if (!fgets(l, sizeof(l), f)) {
1231                         if (feof(f))
1232                                 break;
1233
1234                         r = -errno;
1235                         log_error("[%s:%u] Failed to read environment file '%s': %m", filename, line, rvalue);
1236                         goto finish;
1237                 }
1238
1239                 p = strstrip(l);
1240
1241                 if (!*p)
1242                         continue;
1243
1244                 if (strchr(COMMENTS, *p))
1245                         continue;
1246
1247                 t = strv_env_set(*env, p);
1248                 strv_free(*env);
1249                 *env = t;
1250         }
1251
1252         r = 0;
1253
1254 finish:
1255         if (f)
1256                 fclose(f);
1257
1258         return r;
1259 }
1260
1261 static int config_parse_ip_tos(
1262                 const char *filename,
1263                 unsigned line,
1264                 const char *section,
1265                 const char *lvalue,
1266                 const char *rvalue,
1267                 void *data,
1268                 void *userdata) {
1269
1270         int *ip_tos = data, x;
1271         int r;
1272
1273         assert(filename);
1274         assert(lvalue);
1275         assert(rvalue);
1276         assert(data);
1277
1278         if ((x = ip_tos_from_string(rvalue)) < 0)
1279                 if ((r = safe_atoi(rvalue, &x)) < 0) {
1280                         log_error("[%s:%u] Failed to parse IP TOS value: %s", filename, line, rvalue);
1281                         return r;
1282                 }
1283
1284         *ip_tos = x;
1285         return 0;
1286 }
1287
1288 static DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier");
1289
1290 #define FOLLOW_MAX 8
1291
1292 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
1293         unsigned c = 0;
1294         int fd, r;
1295         FILE *f;
1296         char *id = NULL;
1297
1298         assert(filename);
1299         assert(*filename);
1300         assert(_f);
1301         assert(names);
1302
1303         /* This will update the filename pointer if the loaded file is
1304          * reached by a symlink. The old string will be freed. */
1305
1306         for (;;) {
1307                 char *target, *name;
1308
1309                 if (c++ >= FOLLOW_MAX)
1310                         return -ELOOP;
1311
1312                 path_kill_slashes(*filename);
1313
1314                 /* Add the file name we are currently looking at to
1315                  * the names of this unit, but only if it is a valid
1316                  * unit name. */
1317                 name = file_name_from_path(*filename);
1318
1319                 if (unit_name_is_valid(name)) {
1320                         if (!(id = set_get(names, name))) {
1321
1322                                 if (!(id = strdup(name)))
1323                                         return -ENOMEM;
1324
1325                                 if ((r = set_put(names, id)) < 0) {
1326                                         free(id);
1327                                         return r;
1328                                 }
1329                         }
1330                 }
1331
1332                 /* Try to open the file name, but don't if its a symlink */
1333                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
1334                         break;
1335
1336                 if (errno != ELOOP)
1337                         return -errno;
1338
1339                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
1340                 if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
1341                         return r;
1342
1343                 free(*filename);
1344                 *filename = target;
1345         }
1346
1347         if (!(f = fdopen(fd, "re"))) {
1348                 r = -errno;
1349                 close_nointr_nofail(fd);
1350                 return r;
1351         }
1352
1353         *_f = f;
1354         *_final = id;
1355         return 0;
1356 }
1357
1358 static int merge_by_names(Unit **u, Set *names, const char *id) {
1359         char *k;
1360         int r;
1361
1362         assert(u);
1363         assert(*u);
1364         assert(names);
1365
1366         /* Let's try to add in all symlink names we found */
1367         while ((k = set_steal_first(names))) {
1368
1369                 /* First try to merge in the other name into our
1370                  * unit */
1371                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1372                         Unit *other;
1373
1374                         /* Hmm, we couldn't merge the other unit into
1375                          * ours? Then let's try it the other way
1376                          * round */
1377
1378                         other = manager_get_unit((*u)->meta.manager, k);
1379                         free(k);
1380
1381                         if (other)
1382                                 if ((r = unit_merge(other, *u)) >= 0) {
1383                                         *u = other;
1384                                         return merge_by_names(u, names, NULL);
1385                                 }
1386
1387                         return r;
1388                 }
1389
1390                 if (id == k)
1391                         unit_choose_id(*u, id);
1392
1393                 free(k);
1394         }
1395
1396         return 0;
1397 }
1398
1399 static void dump_items(FILE *f, const ConfigItem *items) {
1400         const ConfigItem *i;
1401         const char *prev_section = NULL;
1402         bool not_first = false;
1403
1404         struct {
1405                 ConfigParserCallback callback;
1406                 const char *rvalue;
1407         } table[] = {
1408                 { config_parse_int,              "INTEGER" },
1409                 { config_parse_unsigned,         "UNSIGNED" },
1410                 { config_parse_size,             "SIZE" },
1411                 { config_parse_bool,             "BOOLEAN" },
1412                 { config_parse_string,           "STRING" },
1413                 { config_parse_path,             "PATH" },
1414                 { config_parse_strv,             "STRING [...]" },
1415                 { config_parse_nice,             "NICE" },
1416                 { config_parse_oom_adjust,       "OOMADJUST" },
1417                 { config_parse_io_class,         "IOCLASS" },
1418                 { config_parse_io_priority,      "IOPRIORITY" },
1419                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1420                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1421                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1422                 { config_parse_mode,             "MODE" },
1423                 { config_parse_env_file,         "FILE" },
1424                 { config_parse_output,           "OUTPUT" },
1425                 { config_parse_input,            "INPUT" },
1426                 { config_parse_facility,         "FACILITY" },
1427                 { config_parse_level,            "LEVEL" },
1428                 { config_parse_capabilities,     "CAPABILITIES" },
1429                 { config_parse_secure_bits,      "SECUREBITS" },
1430                 { config_parse_bounding_set,     "BOUNDINGSET" },
1431                 { config_parse_timer_slack_nsec, "TIMERSLACK" },
1432                 { config_parse_limit,            "LIMIT" },
1433                 { config_parse_cgroup,           "CGROUP [...]" },
1434                 { config_parse_deps,             "UNIT [...]" },
1435                 { config_parse_names,            "UNIT [...]" },
1436                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1437                 { config_parse_service_type,     "SERVICETYPE" },
1438                 { config_parse_service_restart,  "SERVICERESTART" },
1439                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1440                 { config_parse_kill_mode,        "KILLMODE" },
1441                 { config_parse_kill_signal,      "SIGNAL" },
1442                 { config_parse_listen,           "SOCKET [...]" },
1443                 { config_parse_socket_bind,      "SOCKETBIND" },
1444                 { config_parse_bindtodevice,     "NETWORKINTERFACE" },
1445                 { config_parse_usec,             "SECONDS" },
1446                 { config_parse_path_strv,        "PATH [...]" },
1447                 { config_parse_mount_flags,      "MOUNTFLAG [...]" },
1448                 { config_parse_string_printf,    "STRING" },
1449                 { config_parse_timer,            "TIMER" },
1450                 { config_parse_timer_unit,       "NAME" },
1451                 { config_parse_path_spec,        "PATH" },
1452                 { config_parse_path_unit,        "UNIT" },
1453                 { config_parse_notify_access,    "ACCESS" },
1454                 { config_parse_ip_tos,           "TOS" },
1455         };
1456
1457         assert(f);
1458         assert(items);
1459
1460         for (i = items; i->lvalue; i++) {
1461                 unsigned j;
1462                 const char *rvalue = "OTHER";
1463
1464                 if (!streq_ptr(i->section, prev_section)) {
1465                         if (!not_first)
1466                                 not_first = true;
1467                         else
1468                                 fputc('\n', f);
1469
1470                         fprintf(f, "[%s]\n", i->section);
1471                         prev_section = i->section;
1472                 }
1473
1474                 for (j = 0; j < ELEMENTSOF(table); j++)
1475                         if (i->parse == table[j].callback) {
1476                                 rvalue = table[j].rvalue;
1477                                 break;
1478                         }
1479
1480                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1481         }
1482 }
1483
1484 static int load_from_path(Unit *u, const char *path) {
1485
1486         static const char* const section_table[_UNIT_TYPE_MAX] = {
1487                 [UNIT_SERVICE]   = "Service",
1488                 [UNIT_TIMER]     = "Timer",
1489                 [UNIT_SOCKET]    = "Socket",
1490                 [UNIT_TARGET]    = "Target",
1491                 [UNIT_DEVICE]    = "Device",
1492                 [UNIT_MOUNT]     = "Mount",
1493                 [UNIT_AUTOMOUNT] = "Automount",
1494                 [UNIT_SNAPSHOT]  = "Snapshot",
1495                 [UNIT_SWAP]      = "Swap",
1496                 [UNIT_PATH]      = "Path"
1497         };
1498
1499 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1500                 { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
1501                 { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
1502                 { "User",                   config_parse_string_printf,   &(context).user,                                 section   }, \
1503                 { "Group",                  config_parse_string_printf,   &(context).group,                                section   }, \
1504                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
1505                 { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
1506                 { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
1507                 { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
1508                 { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
1509                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
1510                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
1511                 { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
1512                 { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
1513                 { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
1514                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
1515                 { "EnvironmentFile",        config_parse_env_file,        &(context).environment,                          section   }, \
1516                 { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
1517                 { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
1518                 { "StandardError",          config_parse_output,          &(context).std_error,                            section   }, \
1519                 { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
1520                 { "SyslogIdentifier",       config_parse_string_printf,   &(context).syslog_identifier,                    section   }, \
1521                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
1522                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
1523                 { "SyslogLevelPrefix",      config_parse_bool,            &(context).syslog_level_prefix,                  section   }, \
1524                 { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
1525                 { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
1526                 { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
1527                 { "TimerSlackNSec",         config_parse_timer_slack_nsec,&(context),                                      section   }, \
1528                 { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
1529                 { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1530                 { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
1531                 { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
1532                 { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
1533                 { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
1534                 { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1535                 { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
1536                 { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1537                 { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1538                 { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1539                 { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1540                 { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1541                 { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
1542                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1543                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1544                 { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
1545                 { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
1546                 { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
1547                 { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
1548                 { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
1549                 { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }, \
1550                 { "TCPWrapName",            config_parse_string_printf,   &(context).tcpwrap_name,                         section   }, \
1551                 { "PAMName",                config_parse_string_printf,   &(context).pam_name,                             section   }, \
1552                 { "KillMode",               config_parse_kill_mode,       &(context).kill_mode,                            section   }, \
1553                 { "KillSignal",             config_parse_kill_signal,     &(context).kill_signal,                          section   }
1554
1555         const ConfigItem items[] = {
1556                 { "Names",                  config_parse_names,           u,                                               "Unit"    },
1557                 { "Description",            config_parse_string_printf,   &u->meta.description,                            "Unit"    },
1558                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1559                 { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1560                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1561                 { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1562                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1563                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1564                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1565                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1566                 { "OnFailure",              config_parse_deps,            UINT_TO_PTR(UNIT_ON_FAILURE),                    "Unit"    },
1567                 { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
1568                 { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
1569                 { "OnlyByDependency",       config_parse_bool,            &u->meta.only_by_dependency,                     "Unit"    },
1570                 { "DefaultDependencies",    config_parse_bool,            &u->meta.default_dependencies,                   "Unit"    },
1571                 { "IgnoreDependencyFailure",config_parse_bool,            &u->meta.ignore_dependency_failure,              "Unit"    },
1572                 { "JobTimeoutSec",          config_parse_usec,            &u->meta.job_timeout,                            "Unit"    },
1573
1574                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
1575                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1576                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1577                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1578                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1579                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1580                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1581                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
1582                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
1583                 { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
1584                 { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
1585                 { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
1586                 { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
1587                 { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
1588                 { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
1589                 { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
1590                 { "BusName",                config_parse_string_printf,   &u->service.bus_name,                            "Service" },
1591                 { "NotifyAccess",           config_parse_notify_access,   &u->service.notify_access,                       "Service" },
1592                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1593
1594                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
1595                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
1596                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
1597                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
1598                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
1599                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
1600                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
1601                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
1602                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
1603                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
1604                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
1605                 { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
1606                 { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
1607                 { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
1608                 { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
1609                 { "MaxConnections",         config_parse_unsigned,        &u->socket.max_connections,                      "Socket"  },
1610                 { "KeepAlive",              config_parse_bool,            &u->socket.keep_alive,                           "Socket"  },
1611                 { "Priority",               config_parse_int,             &u->socket.priority,                             "Socket"  },
1612                 { "ReceiveBuffer",          config_parse_size,            &u->socket.receive_buffer,                       "Socket"  },
1613                 { "SendBuffer",             config_parse_size,            &u->socket.send_buffer,                          "Socket"  },
1614                 { "IPTOS",                  config_parse_ip_tos,          &u->socket.ip_tos,                               "Socket"  },
1615                 { "IPTTL",                  config_parse_int,             &u->socket.ip_ttl,                               "Socket"  },
1616                 { "Mark",                   config_parse_int,             &u->socket.mark,                                 "Socket"  },
1617                 { "PipeSize",               config_parse_size,            &u->socket.pipe_size,                            "Socket"  },
1618                 { "FreeBind",               config_parse_bool,            &u->socket.free_bind,                            "Socket"  },
1619                 { "TCPCongestion",          config_parse_string,          &u->socket.tcp_congestion,                       "Socket"  },
1620                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
1621
1622                 { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
1623                 { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
1624                 { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
1625                 { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
1626                 { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
1627                 { "DirectoryMode",          config_parse_mode,            &u->mount.directory_mode,                        "Mount"   },
1628                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
1629
1630                 { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
1631                 { "DirectoryMode",          config_parse_mode,            &u->automount.directory_mode,                    "Automount" },
1632
1633                 { "What",                   config_parse_path,            &u->swap.parameters_fragment.what,               "Swap"    },
1634                 { "Priority",               config_parse_int,             &u->swap.parameters_fragment.priority,           "Swap"    },
1635
1636                 { "OnActiveSec",            config_parse_timer,           &u->timer,                                       "Timer"   },
1637                 { "OnBootSec",              config_parse_timer,           &u->timer,                                       "Timer"   },
1638                 { "OnStartupSec",           config_parse_timer,           &u->timer,                                       "Timer"   },
1639                 { "OnUnitActiveSec",        config_parse_timer,           &u->timer,                                       "Timer"   },
1640                 { "OnUnitInactiveSec",      config_parse_timer,           &u->timer,                                       "Timer"   },
1641                 { "Unit",                   config_parse_timer_unit,      &u->timer,                                       "Timer"   },
1642
1643                 { "PathExists",             config_parse_path_spec,       &u->path,                                        "Path"    },
1644                 { "PathChanged",            config_parse_path_spec,       &u->path,                                        "Path"    },
1645                 { "DirectoryNotEmpty",      config_parse_path_spec,       &u->path,                                        "Path"    },
1646                 { "Unit",                   config_parse_path_unit,       &u->path,                                        "Path"    },
1647
1648                 /* The [Install] section is ignored here. */
1649                 { "Alias",                  NULL,                         NULL,                                            "Install" },
1650                 { "WantedBy",               NULL,                         NULL,                                            "Install" },
1651                 { "Also",                   NULL,                         NULL,                                            "Install" },
1652
1653                 { NULL, NULL, NULL, NULL }
1654         };
1655
1656 #undef EXEC_CONTEXT_CONFIG_ITEMS
1657
1658         const char *sections[4];
1659         int r;
1660         Set *symlink_names;
1661         FILE *f = NULL;
1662         char *filename = NULL, *id = NULL;
1663         Unit *merged;
1664         struct stat st;
1665
1666         if (!u) {
1667                 /* Dirty dirty hack. */
1668                 dump_items((FILE*) path, items);
1669                 return 0;
1670         }
1671
1672         assert(u);
1673         assert(path);
1674
1675         sections[0] = "Unit";
1676         sections[1] = section_table[u->meta.type];
1677         sections[2] = "Install";
1678         sections[3] = NULL;
1679
1680         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
1681                 return -ENOMEM;
1682
1683         if (path_is_absolute(path)) {
1684
1685                 if (!(filename = strdup(path))) {
1686                         r = -ENOMEM;
1687                         goto finish;
1688                 }
1689
1690                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1691                         free(filename);
1692                         filename = NULL;
1693
1694                         if (r != -ENOENT)
1695                                 goto finish;
1696                 }
1697
1698         } else  {
1699                 char **p;
1700
1701                 STRV_FOREACH(p, u->meta.manager->lookup_paths.unit_path) {
1702
1703                         /* Instead of opening the path right away, we manually
1704                          * follow all symlinks and add their name to our unit
1705                          * name set while doing so */
1706                         if (!(filename = path_make_absolute(path, *p))) {
1707                                 r = -ENOMEM;
1708                                 goto finish;
1709                         }
1710
1711                         if (u->meta.manager->unit_path_cache &&
1712                             !set_get(u->meta.manager->unit_path_cache, filename))
1713                                 r = -ENOENT;
1714                         else
1715                                 r = open_follow(&filename, &f, symlink_names, &id);
1716
1717                         if (r < 0) {
1718                                 char *sn;
1719
1720                                 free(filename);
1721                                 filename = NULL;
1722
1723                                 if (r != -ENOENT)
1724                                         goto finish;
1725
1726                                 /* Empty the symlink names for the next run */
1727                                 while ((sn = set_steal_first(symlink_names)))
1728                                         free(sn);
1729
1730                                 continue;
1731                         }
1732
1733                         break;
1734                 }
1735         }
1736
1737         if (!filename) {
1738                 /* Hmm, no suitable file found? */
1739                 r = 0;
1740                 goto finish;
1741         }
1742
1743         merged = u;
1744         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
1745                 goto finish;
1746
1747         if (merged != u) {
1748                 u->meta.load_state = UNIT_MERGED;
1749                 r = 0;
1750                 goto finish;
1751         }
1752
1753         zero(st);
1754         if (fstat(fileno(f), &st) < 0) {
1755                 r = -errno;
1756                 goto finish;
1757         }
1758
1759         /* Now, parse the file contents */
1760         if ((r = config_parse(filename, f, sections, items, false, u)) < 0)
1761                 goto finish;
1762
1763         free(u->meta.fragment_path);
1764         u->meta.fragment_path = filename;
1765         filename = NULL;
1766
1767         u->meta.fragment_mtime = timespec_load(&st.st_mtim);
1768
1769         u->meta.load_state = UNIT_LOADED;
1770         r = 0;
1771
1772 finish:
1773         set_free_free(symlink_names);
1774         free(filename);
1775
1776         if (f)
1777                 fclose(f);
1778
1779         return r;
1780 }
1781
1782 int unit_load_fragment(Unit *u) {
1783         int r;
1784         Iterator i;
1785         const char *t;
1786
1787         assert(u);
1788         assert(u->meta.load_state == UNIT_STUB);
1789         assert(u->meta.id);
1790
1791         /* First, try to find the unit under its id. We always look
1792          * for unit files in the default directories, to make it easy
1793          * to override things by placing things in /etc/systemd/system */
1794         if ((r = load_from_path(u, u->meta.id)) < 0)
1795                 return r;
1796
1797         /* Try to find an alias we can load this with */
1798         if (u->meta.load_state == UNIT_STUB)
1799                 SET_FOREACH(t, u->meta.names, i) {
1800
1801                         if (t == u->meta.id)
1802                                 continue;
1803
1804                         if ((r = load_from_path(u, t)) < 0)
1805                                 return r;
1806
1807                         if (u->meta.load_state != UNIT_STUB)
1808                                 break;
1809                 }
1810
1811         /* And now, try looking for it under the suggested (originally linked) path */
1812         if (u->meta.load_state == UNIT_STUB && u->meta.fragment_path)
1813                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
1814                         return r;
1815
1816         /* Look for a template */
1817         if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
1818                 char *k;
1819
1820                 if (!(k = unit_name_template(u->meta.id)))
1821                         return -ENOMEM;
1822
1823                 r = load_from_path(u, k);
1824                 free(k);
1825
1826                 if (r < 0)
1827                         return r;
1828
1829                 if (u->meta.load_state == UNIT_STUB)
1830                         SET_FOREACH(t, u->meta.names, i) {
1831
1832                                 if (t == u->meta.id)
1833                                         continue;
1834
1835                                 if (!(k = unit_name_template(t)))
1836                                         return -ENOMEM;
1837
1838                                 r = load_from_path(u, k);
1839                                 free(k);
1840
1841                                 if (r < 0)
1842                                         return r;
1843
1844                                 if (u->meta.load_state != UNIT_STUB)
1845                                         break;
1846                         }
1847         }
1848
1849         return 0;
1850 }
1851
1852 void unit_dump_config_items(FILE *f) {
1853         /* OK, this wins a prize for extreme ugliness. */
1854
1855         load_from_path(NULL, (const void*) f);
1856 }