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