src/load-fragment.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   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 #include <sys/time.h>
  34 #include <sys/resource.h>
  35
  36 #include "unit.h"
  37 #include "strv.h"
  38 #include "conf-parser.h"
  39 #include "load-fragment.h"
  40 #include "log.h"
  41 #include "ioprio.h"
  42 #include "securebits.h"
  43 #include "missing.h"
  44 #include "unit-name.h"
  45 #include "bus-errors.h"
  46
  47 #ifndef HAVE_SYSV_COMPAT
  48 static int config_parse_warn_compat(
  49                 const char *filename,
  50                 unsigned line,
  51                 const char *section,
  52                 const char *lvalue,
  53                 int ltype,
  54                 const char *rvalue,
  55                 void *data,
  56                 void *userdata) {
  57
  58         log_debug("[%s:%u] Support for option %s= has been disabled at compile time and is ignored", filename, line, lvalue);
  59         return 0;
  60 }
  61 #endif
  62
  63 static int config_parse_deps(
  64                 const char *filename,
  65                 unsigned line,
  66                 const char *section,
  67                 const char *lvalue,
  68                 int ltype,
  69                 const char *rvalue,
  70                 void *data,
  71                 void *userdata) {
  72
  73         UnitDependency d = PTR_TO_UINT(data);
  74         Unit *u = userdata;
  75         char *w;
  76         size_t l;
  77         char *state;
  78
  79         assert(filename);
  80         assert(lvalue);
  81         assert(rvalue);
  82
  83         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
  84                 char *t, *k;
  85                 int r;
  86
  87                 if (!(t = strndup(w, l)))
  88                         return -ENOMEM;
  89
  90                 k = unit_name_printf(u, t);
  91                 free(t);
  92
  93                 if (!k)
  94                         return -ENOMEM;
  95
  96                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
  97
  98                 if (r < 0) {
  99                         log_error("Failed to add dependency on %s, ignoring: %s", k, strerror(-r));
 100                         free(k);
 101                         return 0;
 102                 }
 103
 104                 free(k);
 105         }
 106
 107         return 0;
 108 }
 109
 110 static int config_parse_names(
 111                 const char *filename,
 112                 unsigned line,
 113                 const char *section,
 114                 const char *lvalue,
 115                 int ltype,
 116                 const char *rvalue,
 117                 void *data,
 118                 void *userdata) {
 119
 120         Unit *u = userdata;
 121         char *w;
 122         size_t l;
 123         char *state;
 124
 125         assert(filename);
 126         assert(lvalue);
 127         assert(rvalue);
 128         assert(data);
 129
 130         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 131                 char *t, *k;
 132                 int r;
 133
 134                 if (!(t = strndup(w, l)))
 135                         return -ENOMEM;
 136
 137                 k = unit_name_printf(u, t);
 138                 free(t);
 139
 140                 if (!k)
 141                         return -ENOMEM;
 142
 143                 r = unit_merge_by_name(u, k);
 144
 145                 if (r < 0) {
 146                         log_error("Failed to add name %s, ignoring: %s", k, strerror(-r));
 147                         free(k);
 148                         return 0;
 149                 }
 150
 151                 free(k);
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int config_parse_string_printf(
 158                 const char *filename,
 159                 unsigned line,
 160                 const char *section,
 161                 const char *lvalue,
 162                 int ltype,
 163                 const char *rvalue,
 164                 void *data,
 165                 void *userdata) {
 166
 167         Unit *u = userdata;
 168         char **s = data;
 169         char *k;
 170
 171         assert(filename);
 172         assert(lvalue);
 173         assert(rvalue);
 174         assert(s);
 175         assert(u);
 176
 177         if (!(k = unit_full_printf(u, rvalue)))
 178                 return -ENOMEM;
 179
 180         free(*s);
 181         if (*k)
 182                 *s = k;
 183         else {
 184                 free(k);
 185                 *s = NULL;
 186         }
 187
 188         return 0;
 189 }
 190
 191 static int config_parse_path_printf(
 192                 const char *filename,
 193                 unsigned line,
 194                 const char *section,
 195                 const char *lvalue,
 196                 int ltype,
 197                 const char *rvalue,
 198                 void *data,
 199                 void *userdata) {
 200
 201         Unit *u = userdata;
 202         char **s = data;
 203         char *k;
 204
 205         assert(filename);
 206         assert(lvalue);
 207         assert(rvalue);
 208         assert(s);
 209         assert(u);
 210
 211         if (!(k = unit_full_printf(u, rvalue)))
 212                 return -ENOMEM;
 213
 214         if (!path_is_absolute(k)) {
 215                 log_error("[%s:%u] Not an absolute path: %s", filename, line, k);
 216                 free(k);
 217                 return -EINVAL;
 218         }
 219
 220         path_kill_slashes(k);
 221
 222         free(*s);
 223         *s = k;
 224
 225         return 0;
 226 }
 227
 228 static int config_parse_listen(
 229                 const char *filename,
 230                 unsigned line,
 231                 const char *section,
 232                 const char *lvalue,
 233                 int ltype,
 234                 const char *rvalue,
 235                 void *data,
 236                 void *userdata) {
 237
 238         SocketPort *p, *tail;
 239         Socket *s;
 240
 241         assert(filename);
 242         assert(lvalue);
 243         assert(rvalue);
 244         assert(data);
 245
 246         s = (Socket*) data;
 247
 248         if (!(p = new0(SocketPort, 1)))
 249                 return -ENOMEM;
 250
 251         if (streq(lvalue, "ListenFIFO")) {
 252                 p->type = SOCKET_FIFO;
 253
 254                 if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
 255                         free(p);
 256                         return -ENOMEM;
 257                 }
 258
 259                 path_kill_slashes(p->path);
 260
 261         } else if (streq(lvalue, "ListenSpecial")) {
 262                 p->type = SOCKET_SPECIAL;
 263
 264                 if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
 265                         free(p);
 266                         return -ENOMEM;
 267                 }
 268
 269                 path_kill_slashes(p->path);
 270
 271         } else if (streq(lvalue, "ListenMessageQueue")) {
 272
 273                 p->type = SOCKET_MQUEUE;
 274
 275                 if (!(p->path = unit_full_printf(UNIT(s), rvalue))) {
 276                         free(p);
 277                         return -ENOMEM;
 278                 }
 279
 280                 path_kill_slashes(p->path);
 281
 282         } else if (streq(lvalue, "ListenNetlink")) {
 283                 char  *k;
 284                 int r;
 285
 286                 p->type = SOCKET_SOCKET;
 287                 k = unit_full_printf(UNIT(s), rvalue);
 288                 r = socket_address_parse_netlink(&p->address, k);
 289                 free(k);
 290
 291                 if (r < 0) {
 292                         log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue);
 293                         free(p);
 294                         return 0;
 295                 }
 296
 297         } else {
 298                 char *k;
 299                 int r;
 300
 301                 p->type = SOCKET_SOCKET;
 302                 k = unit_full_printf(UNIT(s), rvalue);
 303                 r = socket_address_parse(&p->address, k);
 304                 free(k);
 305
 306                 if (r < 0) {
 307                         log_error("[%s:%u] Failed to parse address value, ignoring: %s", filename, line, rvalue);
 308                         free(p);
 309                         return 0;
 310                 }
 311
 312                 if (streq(lvalue, "ListenStream"))
 313                         p->address.type = SOCK_STREAM;
 314                 else if (streq(lvalue, "ListenDatagram"))
 315                         p->address.type = SOCK_DGRAM;
 316                 else {
 317                         assert(streq(lvalue, "ListenSequentialPacket"));
 318                         p->address.type = SOCK_SEQPACKET;
 319                 }
 320
 321                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
 322                         log_error("[%s:%u] Address family not supported, ignoring: %s", filename, line, rvalue);
 323                         free(p);
 324                         return 0;
 325                 }
 326         }
 327
 328         p->fd = -1;
 329
 330         if (s->ports) {
 331                 LIST_FIND_TAIL(SocketPort, port, s->ports, tail);
 332                 LIST_INSERT_AFTER(SocketPort, port, s->ports, tail, p);
 333         } else
 334                 LIST_PREPEND(SocketPort, port, s->ports, p);
 335
 336         return 0;
 337 }
 338
 339 static int config_parse_socket_bind(
 340                 const char *filename,
 341                 unsigned line,
 342                 const char *section,
 343                 const char *lvalue,
 344                 int ltype,
 345                 const char *rvalue,
 346                 void *data,
 347                 void *userdata) {
 348
 349         Socket *s;
 350         SocketAddressBindIPv6Only b;
 351
 352         assert(filename);
 353         assert(lvalue);
 354         assert(rvalue);
 355         assert(data);
 356
 357         s = (Socket*) data;
 358
 359         if ((b = socket_address_bind_ipv6_only_from_string(rvalue)) < 0) {
 360                 int r;
 361
 362                 if ((r = parse_boolean(rvalue)) < 0) {
 363                         log_error("[%s:%u] Failed to parse bind IPv6 only value, ignoring: %s", filename, line, rvalue);
 364                         return 0;
 365                 }
 366
 367                 s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
 368         } else
 369                 s->bind_ipv6_only = b;
 370
 371         return 0;
 372 }
 373
 374 static int config_parse_nice(
 375                 const char *filename,
 376                 unsigned line,
 377                 const char *section,
 378                 const char *lvalue,
 379                 int ltype,
 380                 const char *rvalue,
 381                 void *data,
 382                 void *userdata) {
 383
 384         ExecContext *c = data;
 385         int priority;
 386
 387         assert(filename);
 388         assert(lvalue);
 389         assert(rvalue);
 390         assert(data);
 391
 392         if (safe_atoi(rvalue, &priority) < 0) {
 393                 log_error("[%s:%u] Failed to parse nice priority, ignoring: %s. ", filename, line, rvalue);
 394                 return 0;
 395         }
 396
 397         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
 398                 log_error("[%s:%u] Nice priority out of range, ignoring: %s", filename, line, rvalue);
 399                 return 0;
 400         }
 401
 402         c->nice = priority;
 403         c->nice_set = true;
 404
 405         return 0;
 406 }
 407
 408 static int config_parse_oom_score_adjust(
 409                 const char *filename,
 410                 unsigned line,
 411                 const char *section,
 412                 const char *lvalue,
 413                 int ltype,
 414                 const char *rvalue,
 415                 void *data,
 416                 void *userdata) {
 417
 418         ExecContext *c = data;
 419         int oa;
 420
 421         assert(filename);
 422         assert(lvalue);
 423         assert(rvalue);
 424         assert(data);
 425
 426         if (safe_atoi(rvalue, &oa) < 0) {
 427                 log_error("[%s:%u] Failed to parse the OOM score adjust value, ignoring: %s", filename, line, rvalue);
 428                 return 0;
 429         }
 430
 431         if (oa < OOM_SCORE_ADJ_MIN || oa > OOM_SCORE_ADJ_MAX) {
 432                 log_error("[%s:%u] OOM score adjust value out of range, ignoring: %s", filename, line, rvalue);
 433                 return 0;
 434         }
 435
 436         c->oom_score_adjust = oa;
 437         c->oom_score_adjust_set = true;
 438
 439         return 0;
 440 }
 441
 442 static int config_parse_mode(
 443                 const char *filename,
 444                 unsigned line,
 445                 const char *section,
 446                 const char *lvalue,
 447                 int ltype,
 448                 const char *rvalue,
 449                 void *data,
 450                 void *userdata) {
 451
 452         mode_t *m = data;
 453         long l;
 454         char *x = NULL;
 455
 456         assert(filename);
 457         assert(lvalue);
 458         assert(rvalue);
 459         assert(data);
 460
 461         errno = 0;
 462         l = strtol(rvalue, &x, 8);
 463         if (!x || *x || errno) {
 464                 log_error("[%s:%u] Failed to parse mode value, ignoring: %s", filename, line, rvalue);
 465                 return 0;
 466         }
 467
 468         if (l < 0000 || l > 07777) {
 469                 log_error("[%s:%u] mode value out of range, ignoring: %s", filename, line, rvalue);
 470                 return 0;
 471         }
 472
 473         *m = (mode_t) l;
 474         return 0;
 475 }
 476
 477 static int config_parse_exec(
 478                 const char *filename,
 479                 unsigned line,
 480                 const char *section,
 481                 const char *lvalue,
 482                 int ltype,
 483                 const char *rvalue,
 484                 void *data,
 485                 void *userdata) {
 486
 487         ExecCommand **e = data, *nce;
 488         char *path, **n;
 489         unsigned k;
 490
 491         assert(filename);
 492         assert(lvalue);
 493         assert(rvalue);
 494         assert(e);
 495
 496         /* We accept an absolute path as first argument, or
 497          * alternatively an absolute prefixed with @ to allow
 498          * overriding of argv[0]. */
 499
 500         for (;;) {
 501                 char *w;
 502                 size_t l;
 503                 char *state;
 504                 bool honour_argv0 = false, ignore = false;
 505
 506                 path = NULL;
 507                 nce = NULL;
 508                 n = NULL;
 509
 510                 rvalue += strspn(rvalue, WHITESPACE);
 511
 512                 if (rvalue[0] == 0)
 513                         break;
 514
 515                 if (rvalue[0] == '-') {
 516                         ignore = true;
 517                         rvalue ++;
 518                 }
 519
 520                 if (rvalue[0] == '@') {
 521                         honour_argv0 = true;
 522                         rvalue ++;
 523                 }
 524
 525                 if (*rvalue != '/') {
 526                         log_error("[%s:%u] Invalid executable path in command line, ignoring: %s", filename, line, rvalue);
 527                         return 0;
 528                 }
 529
 530                 k = 0;
 531                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 532                         if (strncmp(w, ";", MAX(l, 1U)) == 0)
 533                                 break;
 534
 535                         k++;
 536                 }
 537
 538                 if (!(n = new(char*, k + !honour_argv0)))
 539                         return -ENOMEM;
 540
 541                 k = 0;
 542                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 543                         if (strncmp(w, ";", MAX(l, 1U)) == 0)
 544                                 break;
 545
 546                         if (honour_argv0 && w == rvalue) {
 547                                 assert(!path);
 548                                 if (!(path = cunescape_length(w, l)))
 549                                         goto fail;
 550                         } else {
 551                                 if (!(n[k++] = cunescape_length(w, l)))
 552                                         goto fail;
 553                         }
 554                 }
 555
 556                 n[k] = NULL;
 557
 558                 if (!n[0]) {
 559                         log_error("[%s:%u] Invalid command line, ignoring: %s", filename, line, rvalue);
 560                         strv_free(n);
 561                         return 0;
 562                 }
 563
 564                 if (!path)
 565                         if (!(path = strdup(n[0])))
 566                                 goto fail;
 567
 568                 assert(path_is_absolute(path));
 569
 570                 if (!(nce = new0(ExecCommand, 1)))
 571                         goto fail;
 572
 573                 nce->argv = n;
 574                 nce->path = path;
 575                 nce->ignore = ignore;
 576
 577                 path_kill_slashes(nce->path);
 578
 579                 exec_command_append_list(e, nce);
 580
 581                 rvalue = state;
 582         }
 583
 584         return 0;
 585
 586 fail:
 587         n[k] = NULL;
 588         strv_free(n);
 589         free(path);
 590         free(nce);
 591
 592         return -ENOMEM;
 593 }
 594
 595 static int config_parse_usec(
 596                 const char *filename,
 597                 unsigned line,
 598                 const char *section,
 599                 const char *lvalue,
 600                 int ltype,
 601                 const char *rvalue,
 602                 void *data,
 603                 void *userdata) {
 604
 605         usec_t *usec = data;
 606
 607         assert(filename);
 608         assert(lvalue);
 609         assert(rvalue);
 610         assert(data);
 611
 612         if (parse_usec(rvalue, usec) < 0) {
 613                 log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
 614                 return 0;
 615         }
 616
 617         return 0;
 618 }
 619
 620 static DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 621 static DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 622
 623 static int config_parse_bindtodevice(
 624                 const char *filename,
 625                 unsigned line,
 626                 const char *section,
 627                 const char *lvalue,
 628                 int ltype,
 629                 const char *rvalue,
 630                 void *data,
 631                 void *userdata) {
 632
 633         Socket *s = data;
 634         char *n;
 635
 636         assert(filename);
 637         assert(lvalue);
 638         assert(rvalue);
 639         assert(data);
 640
 641         if (rvalue[0] && !streq(rvalue, "*")) {
 642                 if (!(n = strdup(rvalue)))
 643                         return -ENOMEM;
 644         } else
 645                 n = NULL;
 646
 647         free(s->bind_to_device);
 648         s->bind_to_device = n;
 649
 650         return 0;
 651 }
 652
 653 static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 654 static DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 655
 656 static int config_parse_facility(
 657                 const char *filename,
 658                 unsigned line,
 659                 const char *section,
 660                 const char *lvalue,
 661                 int ltype,
 662                 const char *rvalue,
 663                 void *data,
 664                 void *userdata) {
 665
 666
 667         int *o = data, x;
 668
 669         assert(filename);
 670         assert(lvalue);
 671         assert(rvalue);
 672         assert(data);
 673
 674         if ((x = log_facility_unshifted_from_string(rvalue)) < 0) {
 675                 log_error("[%s:%u] Failed to parse log facility, ignoring: %s", filename, line, rvalue);
 676                 return 0;
 677         }
 678
 679         *o = (x << 3) | LOG_PRI(*o);
 680
 681         return 0;
 682 }
 683
 684 static int config_parse_level(
 685                 const char *filename,
 686                 unsigned line,
 687                 const char *section,
 688                 const char *lvalue,
 689                 int ltype,
 690                 const char *rvalue,
 691                 void *data,
 692                 void *userdata) {
 693
 694
 695         int *o = data, x;
 696
 697         assert(filename);
 698         assert(lvalue);
 699         assert(rvalue);
 700         assert(data);
 701
 702         if ((x = log_level_from_string(rvalue)) < 0) {
 703                 log_error("[%s:%u] Failed to parse log level, ignoring: %s", filename, line, rvalue);
 704                 return 0;
 705         }
 706
 707         *o = (*o & LOG_FACMASK) | x;
 708         return 0;
 709 }
 710
 711 static int config_parse_io_class(
 712                 const char *filename,
 713                 unsigned line,
 714                 const char *section,
 715                 const char *lvalue,
 716                 int ltype,
 717                 const char *rvalue,
 718                 void *data,
 719                 void *userdata) {
 720
 721         ExecContext *c = data;
 722         int x;
 723
 724         assert(filename);
 725         assert(lvalue);
 726         assert(rvalue);
 727         assert(data);
 728
 729         if ((x = ioprio_class_from_string(rvalue)) < 0) {
 730                 log_error("[%s:%u] Failed to parse IO scheduling class, ignoring: %s", filename, line, rvalue);
 731                 return 0;
 732         }
 733
 734         c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
 735         c->ioprio_set = true;
 736
 737         return 0;
 738 }
 739
 740 static int config_parse_io_priority(
 741                 const char *filename,
 742                 unsigned line,
 743                 const char *section,
 744                 const char *lvalue,
 745                 int ltype,
 746                 const char *rvalue,
 747                 void *data,
 748                 void *userdata) {
 749
 750         ExecContext *c = data;
 751         int i;
 752
 753         assert(filename);
 754         assert(lvalue);
 755         assert(rvalue);
 756         assert(data);
 757
 758         if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
 759                 log_error("[%s:%u] Failed to parse io priority, ignoring: %s", filename, line, rvalue);
 760                 return 0;
 761         }
 762
 763         c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
 764         c->ioprio_set = true;
 765
 766         return 0;
 767 }
 768
 769 static int config_parse_cpu_sched_policy(
 770                 const char *filename,
 771                 unsigned line,
 772                 const char *section,
 773                 const char *lvalue,
 774                 int ltype,
 775                 const char *rvalue,
 776                 void *data,
 777                 void *userdata) {
 778
 779
 780         ExecContext *c = data;
 781         int x;
 782
 783         assert(filename);
 784         assert(lvalue);
 785         assert(rvalue);
 786         assert(data);
 787
 788         if ((x = sched_policy_from_string(rvalue)) < 0) {
 789                 log_error("[%s:%u] Failed to parse CPU scheduling policy, ignoring: %s", filename, line, rvalue);
 790                 return 0;
 791         }
 792
 793         c->cpu_sched_policy = x;
 794         c->cpu_sched_set = true;
 795
 796         return 0;
 797 }
 798
 799 static int config_parse_cpu_sched_prio(
 800                 const char *filename,
 801                 unsigned line,
 802                 const char *section,
 803                 const char *lvalue,
 804                 int ltype,
 805                 const char *rvalue,
 806                 void *data,
 807                 void *userdata) {
 808
 809         ExecContext *c = data;
 810         int i;
 811
 812         assert(filename);
 813         assert(lvalue);
 814         assert(rvalue);
 815         assert(data);
 816
 817         /* On Linux RR/FIFO have the same range */
 818         if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
 819                 log_error("[%s:%u] Failed to parse CPU scheduling priority, ignoring: %s", filename, line, rvalue);
 820                 return 0;
 821         }
 822
 823         c->cpu_sched_priority = i;
 824         c->cpu_sched_set = true;
 825
 826         return 0;
 827 }
 828
 829 static int config_parse_cpu_affinity(
 830                 const char *filename,
 831                 unsigned line,
 832                 const char *section,
 833                 const char *lvalue,
 834                 int ltype,
 835                 const char *rvalue,
 836                 void *data,
 837                 void *userdata) {
 838
 839         ExecContext *c = data;
 840         char *w;
 841         size_t l;
 842         char *state;
 843
 844         assert(filename);
 845         assert(lvalue);
 846         assert(rvalue);
 847         assert(data);
 848
 849         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 850                 char *t;
 851                 int r;
 852                 unsigned cpu;
 853
 854                 if (!(t = strndup(w, l)))
 855                         return -ENOMEM;
 856
 857                 r = safe_atou(t, &cpu);
 858                 free(t);
 859
 860                 if (!(c->cpuset))
 861                         if (!(c->cpuset = cpu_set_malloc(&c->cpuset_ncpus)))
 862                                 return -ENOMEM;
 863
 864                 if (r < 0 || cpu >= c->cpuset_ncpus) {
 865                         log_error("[%s:%u] Failed to parse CPU affinity, ignoring: %s", filename, line, rvalue);
 866                         return 0;
 867                 }
 868
 869                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset);
 870         }
 871
 872         return 0;
 873 }
 874
 875 static int config_parse_capabilities(
 876                 const char *filename,
 877                 unsigned line,
 878                 const char *section,
 879                 const char *lvalue,
 880                 int ltype,
 881                 const char *rvalue,
 882                 void *data,
 883                 void *userdata) {
 884
 885         ExecContext *c = data;
 886         cap_t cap;
 887
 888         assert(filename);
 889         assert(lvalue);
 890         assert(rvalue);
 891         assert(data);
 892
 893         if (!(cap = cap_from_text(rvalue))) {
 894                 if (errno == ENOMEM)
 895                         return -ENOMEM;
 896
 897                 log_error("[%s:%u] Failed to parse capabilities, ignoring: %s", filename, line, rvalue);
 898                 return 0;
 899         }
 900
 901         if (c->capabilities)
 902                 cap_free(c->capabilities);
 903         c->capabilities = cap;
 904
 905         return 0;
 906 }
 907
 908 static int config_parse_secure_bits(
 909                 const char *filename,
 910                 unsigned line,
 911                 const char *section,
 912                 const char *lvalue,
 913                 int ltype,
 914                 const char *rvalue,
 915                 void *data,
 916                 void *userdata) {
 917
 918         ExecContext *c = data;
 919         char *w;
 920         size_t l;
 921         char *state;
 922
 923         assert(filename);
 924         assert(lvalue);
 925         assert(rvalue);
 926         assert(data);
 927
 928         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 929                 if (first_word(w, "keep-caps"))
 930                         c->secure_bits |= SECURE_KEEP_CAPS;
 931                 else if (first_word(w, "keep-caps-locked"))
 932                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 933                 else if (first_word(w, "no-setuid-fixup"))
 934                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 935                 else if (first_word(w, "no-setuid-fixup-locked"))
 936                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 937                 else if (first_word(w, "noroot"))
 938                         c->secure_bits |= SECURE_NOROOT;
 939                 else if (first_word(w, "noroot-locked"))
 940                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 941                 else {
 942                         log_error("[%s:%u] Failed to parse secure bits, ignoring: %s", filename, line, rvalue);
 943                         return 0;
 944                 }
 945         }
 946
 947         return 0;
 948 }
 949
 950 static int config_parse_bounding_set(
 951                 const char *filename,
 952                 unsigned line,
 953                 const char *section,
 954                 const char *lvalue,
 955                 int ltype,
 956                 const char *rvalue,
 957                 void *data,
 958                 void *userdata) {
 959
 960         ExecContext *c = data;
 961         char *w;
 962         size_t l;
 963         char *state;
 964         bool invert = false;
 965         uint64_t sum = 0;
 966
 967         assert(filename);
 968         assert(lvalue);
 969         assert(rvalue);
 970         assert(data);
 971
 972         if (rvalue[0] == '~') {
 973                 invert = true;
 974                 rvalue++;
 975         }
 976
 977         /* Note that we store this inverted internally, since the
 978          * kernel wants it like this. But we actually expose it
 979          * non-inverted everywhere to have a fully normalized
 980          * interface. */
 981
 982         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 983                 char *t;
 984                 int r;
 985                 cap_value_t cap;
 986
 987                 if (!(t = strndup(w, l)))
 988                         return -ENOMEM;
 989
 990                 r = cap_from_name(t, &cap);
 991                 free(t);
 992
 993                 if (r < 0) {
 994                         log_error("[%s:%u] Failed to parse capability bounding set, ignoring: %s", filename, line, rvalue);
 995                         return 0;
 996                 }
 997
 998                 sum |= ((uint64_t) 1ULL) << (uint64_t) cap;
 999         }
1000
1001         if (invert)
1002                 c->capability_bounding_set_drop |= sum;
1003         else
1004                 c->capability_bounding_set_drop |= ~sum;
1005
1006         return 0;
1007 }
1008
1009 static int config_parse_timer_slack_nsec(
1010                 const char *filename,
1011                 unsigned line,
1012                 const char *section,
1013                 const char *lvalue,
1014                 int ltype,
1015                 const char *rvalue,
1016                 void *data,
1017                 void *userdata) {
1018
1019         ExecContext *c = data;
1020         unsigned long u;
1021
1022         assert(filename);
1023         assert(lvalue);
1024         assert(rvalue);
1025         assert(data);
1026
1027         if (safe_atolu(rvalue, &u) < 0) {
1028                 log_error("[%s:%u] Failed to parse time slack value, ignoring: %s", filename, line, rvalue);
1029                 return 0;
1030         }
1031
1032         c->timer_slack_nsec = u;
1033
1034         return 0;
1035 }
1036
1037 static int config_parse_limit(
1038                 const char *filename,
1039                 unsigned line,
1040                 const char *section,
1041                 const char *lvalue,
1042                 int ltype,
1043                 const char *rvalue,
1044                 void *data,
1045                 void *userdata) {
1046
1047         struct rlimit **rl = data;
1048         unsigned long long u;
1049
1050         assert(filename);
1051         assert(lvalue);
1052         assert(rvalue);
1053         assert(data);
1054
1055         if (streq(rvalue, "infinity"))
1056                 u = (unsigned long long) RLIM_INFINITY;
1057         else if (safe_atollu(rvalue, &u) < 0) {
1058                 log_error("[%s:%u] Failed to parse resource value, ignoring: %s", filename, line, rvalue);
1059                 return 0;
1060         }
1061
1062         if (!*rl)
1063                 if (!(*rl = new(struct rlimit, 1)))
1064                         return -ENOMEM;
1065
1066         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
1067         return 0;
1068 }
1069
1070 static int config_parse_cgroup(
1071                 const char *filename,
1072                 unsigned line,
1073                 const char *section,
1074                 const char *lvalue,
1075                 int ltype,
1076                 const char *rvalue,
1077                 void *data,
1078                 void *userdata) {
1079
1080         Unit *u = userdata;
1081         char *w;
1082         size_t l;
1083         char *state;
1084
1085         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
1086                 char *t, *k;
1087                 int r;
1088
1089                 t = strndup(w, l);
1090                 if (!t)
1091                         return -ENOMEM;
1092
1093                 k = unit_full_printf(u, t);
1094                 free(t);
1095
1096                 if (!k)
1097                         return -ENOMEM;
1098
1099                 t = cunescape(k);
1100                 free(k);
1101
1102                 if (!t)
1103                         return -ENOMEM;
1104
1105                 r = unit_add_cgroup_from_text(u, t);
1106                 free(t);
1107
1108                 if (r < 0) {
1109                         log_error("[%s:%u] Failed to parse cgroup value, ignoring: %s", filename, line, rvalue);
1110                         return 0;
1111                 }
1112         }
1113
1114         return 0;
1115 }
1116
1117 #ifdef HAVE_SYSV_COMPAT
1118 static int config_parse_sysv_priority(
1119                 const char *filename,
1120                 unsigned line,
1121                 const char *section,
1122                 const char *lvalue,
1123                 int ltype,
1124                 const char *rvalue,
1125                 void *data,
1126                 void *userdata) {
1127
1128         int *priority = data;
1129         int i;
1130
1131         assert(filename);
1132         assert(lvalue);
1133         assert(rvalue);
1134         assert(data);
1135
1136         if (safe_atoi(rvalue, &i) < 0 || i < 0) {
1137                 log_error("[%s:%u] Failed to parse SysV start priority, ignoring: %s", filename, line, rvalue);
1138                 return 0;
1139         }
1140
1141         *priority = (int) i;
1142         return 0;
1143 }
1144 #endif
1145
1146 static int config_parse_fsck_passno(
1147                 const char *filename,
1148                 unsigned line,
1149                 const char *section,
1150                 const char *lvalue,
1151                 int ltype,
1152                 const char *rvalue,
1153                 void *data,
1154                 void *userdata) {
1155
1156         int *passno = data;
1157         int i;
1158
1159         assert(filename);
1160         assert(lvalue);
1161         assert(rvalue);
1162         assert(data);
1163
1164         if (safe_atoi(rvalue, &i) || i < 0) {
1165                 log_error("[%s:%u] Failed to parse fsck pass number, ignoring: %s", filename, line, rvalue);
1166                 return 0;
1167         }
1168
1169         *passno = (int) i;
1170         return 0;
1171 }
1172
1173 static DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
1174
1175 static int config_parse_kill_signal(
1176                 const char *filename,
1177                 unsigned line,
1178                 const char *section,
1179                 const char *lvalue,
1180                 int ltype,
1181                 const char *rvalue,
1182                 void *data,
1183                 void *userdata) {
1184
1185         int *sig = data;
1186         int r;
1187
1188         assert(filename);
1189         assert(lvalue);
1190         assert(rvalue);
1191         assert(sig);
1192
1193         if ((r = signal_from_string_try_harder(rvalue)) <= 0) {
1194                 log_error("[%s:%u] Failed to parse kill signal, ignoring: %s", filename, line, rvalue);
1195                 return 0;
1196         }
1197
1198         *sig = r;
1199         return 0;
1200 }
1201
1202 static int config_parse_mount_flags(
1203                 const char *filename,
1204                 unsigned line,
1205                 const char *section,
1206                 const char *lvalue,
1207                 int ltype,
1208                 const char *rvalue,
1209                 void *data,
1210                 void *userdata) {
1211
1212         ExecContext *c = data;
1213         char *w;
1214         size_t l;
1215         char *state;
1216         unsigned long flags = 0;
1217
1218         assert(filename);
1219         assert(lvalue);
1220         assert(rvalue);
1221         assert(data);
1222
1223         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
1224                 if (strncmp(w, "shared", MAX(l, 6U)) == 0)
1225                         flags |= MS_SHARED;
1226                 else if (strncmp(w, "slave", MAX(l, 5U)) == 0)
1227                         flags |= MS_SLAVE;
1228                 else if (strncmp(w, "private", MAX(l, 7U)) == 0)
1229                         flags |= MS_PRIVATE;
1230                 else {
1231                         log_error("[%s:%u] Failed to parse mount flags, ignoring: %s", filename, line, rvalue);
1232                         return 0;
1233                 }
1234         }
1235
1236         c->mount_flags = flags;
1237         return 0;
1238 }
1239
1240 static int config_parse_timer(
1241                 const char *filename,
1242                 unsigned line,
1243                 const char *section,
1244                 const char *lvalue,
1245                 int ltype,
1246                 const char *rvalue,
1247                 void *data,
1248                 void *userdata) {
1249
1250         Timer *t = data;
1251         usec_t u;
1252         TimerValue *v;
1253         TimerBase b;
1254
1255         assert(filename);
1256         assert(lvalue);
1257         assert(rvalue);
1258         assert(data);
1259
1260         if ((b = timer_base_from_string(lvalue)) < 0) {
1261                 log_error("[%s:%u] Failed to parse timer base, ignoring: %s", filename, line, lvalue);
1262                 return 0;
1263         }
1264
1265         if (parse_usec(rvalue, &u) < 0) {
1266                 log_error("[%s:%u] Failed to parse timer value, ignoring: %s", filename, line, rvalue);
1267                 return 0;
1268         }
1269
1270         if (!(v = new0(TimerValue, 1)))
1271                 return -ENOMEM;
1272
1273         v->base = b;
1274         v->value = u;
1275
1276         LIST_PREPEND(TimerValue, value, t->values, v);
1277
1278         return 0;
1279 }
1280
1281 static int config_parse_timer_unit(
1282                 const char *filename,
1283                 unsigned line,
1284                 const char *section,
1285                 const char *lvalue,
1286                 int ltype,
1287                 const char *rvalue,
1288                 void *data,
1289                 void *userdata) {
1290
1291         Timer *t = data;
1292         int r;
1293         DBusError error;
1294
1295         assert(filename);
1296         assert(lvalue);
1297         assert(rvalue);
1298         assert(data);
1299
1300         dbus_error_init(&error);
1301
1302         if (endswith(rvalue, ".timer")) {
1303                 log_error("[%s:%u] Unit cannot be of type timer, ignoring: %s", filename, line, rvalue);
1304                 return 0;
1305         }
1306
1307         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, NULL, &t->unit)) < 0) {
1308                 log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
1309                 dbus_error_free(&error);
1310                 return 0;
1311         }
1312
1313         return 0;
1314 }
1315
1316 static int config_parse_path_spec(
1317                 const char *filename,
1318                 unsigned line,
1319                 const char *section,
1320                 const char *lvalue,
1321                 int ltype,
1322                 const char *rvalue,
1323                 void *data,
1324                 void *userdata) {
1325
1326         Path *p = data;
1327         PathSpec *s;
1328         PathType b;
1329
1330         assert(filename);
1331         assert(lvalue);
1332         assert(rvalue);
1333         assert(data);
1334
1335         if ((b = path_type_from_string(lvalue)) < 0) {
1336                 log_error("[%s:%u] Failed to parse path type, ignoring: %s", filename, line, lvalue);
1337                 return 0;
1338         }
1339
1340         if (!path_is_absolute(rvalue)) {
1341                 log_error("[%s:%u] Path is not absolute, ignoring: %s", filename, line, rvalue);
1342                 return 0;
1343         }
1344
1345         if (!(s = new0(PathSpec, 1)))
1346                 return -ENOMEM;
1347
1348         if (!(s->path = strdup(rvalue))) {
1349                 free(s);
1350                 return -ENOMEM;
1351         }
1352
1353         path_kill_slashes(s->path);
1354
1355         s->type = b;
1356         s->inotify_fd = -1;
1357
1358         LIST_PREPEND(PathSpec, spec, p->specs, s);
1359
1360         return 0;
1361 }
1362
1363 static int config_parse_path_unit(
1364                 const char *filename,
1365                 unsigned line,
1366                 const char *section,
1367                 const char *lvalue,
1368                 int ltype,
1369                 const char *rvalue,
1370                 void *data,
1371                 void *userdata) {
1372
1373         Path *t = data;
1374         int r;
1375         DBusError error;
1376
1377         assert(filename);
1378         assert(lvalue);
1379         assert(rvalue);
1380         assert(data);
1381
1382         dbus_error_init(&error);
1383
1384         if (endswith(rvalue, ".path")) {
1385                 log_error("[%s:%u] Unit cannot be of type path, ignoring: %s", filename, line, rvalue);
1386                 return 0;
1387         }
1388
1389         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &error, &t->unit)) < 0) {
1390                 log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
1391                 dbus_error_free(&error);
1392                 return 0;
1393         }
1394
1395         return 0;
1396 }
1397
1398 static int config_parse_socket_service(
1399                 const char *filename,
1400                 unsigned line,
1401                 const char *section,
1402                 const char *lvalue,
1403                 int ltype,
1404                 const char *rvalue,
1405                 void *data,
1406                 void *userdata) {
1407
1408         Socket *s = data;
1409         int r;
1410         DBusError error;
1411
1412         assert(filename);
1413         assert(lvalue);
1414         assert(rvalue);
1415         assert(data);
1416
1417         dbus_error_init(&error);
1418
1419         if (!endswith(rvalue, ".service")) {
1420                 log_error("[%s:%u] Unit must be of type service, ignoring: %s", filename, line, rvalue);
1421                 return 0;
1422         }
1423
1424         if ((r = manager_load_unit(s->meta.manager, rvalue, NULL, &error, (Unit**) &s->service)) < 0) {
1425                 log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
1426                 dbus_error_free(&error);
1427                 return 0;
1428         }
1429
1430         return 0;
1431 }
1432
1433 static int config_parse_service_sockets(
1434                 const char *filename,
1435                 unsigned line,
1436                 const char *section,
1437                 const char *lvalue,
1438                 int ltype,
1439                 const char *rvalue,
1440                 void *data,
1441                 void *userdata) {
1442
1443         Service *s = data;
1444         int r;
1445         DBusError error;
1446         char *state, *w;
1447         size_t l;
1448
1449         assert(filename);
1450         assert(lvalue);
1451         assert(rvalue);
1452         assert(data);
1453
1454         dbus_error_init(&error);
1455
1456         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
1457                 char *t;
1458                 Unit *sock;
1459
1460                 if (!(t = strndup(w, l)))
1461                         return -ENOMEM;
1462
1463                 if (!endswith(t, ".socket")) {
1464                         log_error("[%s:%u] Unit must be of type socket, ignoring: %s", filename, line, rvalue);
1465                         free(t);
1466                         continue;
1467                 }
1468
1469                 r = manager_load_unit(s->meta.manager, t, NULL, &error, &sock);
1470                 free(t);
1471
1472                 if (r < 0) {
1473                         log_error("[%s:%u] Failed to load unit %s, ignoring: %s", filename, line, rvalue, bus_error(&error, r));
1474                         dbus_error_free(&error);
1475                         continue;
1476                 }
1477
1478                 if ((r = set_ensure_allocated(&s->configured_sockets, trivial_hash_func, trivial_compare_func)) < 0)
1479                         return r;
1480
1481                 if ((r = set_put(s->configured_sockets, sock)) < 0)
1482                         return r;
1483         }
1484
1485         return 0;
1486 }
1487
1488 static int config_parse_env_file(
1489                 const char *filename,
1490                 unsigned line,
1491                 const char *section,
1492                 const char *lvalue,
1493                 int ltype,
1494                 const char *rvalue,
1495                 void *data,
1496                 void *userdata) {
1497
1498         char ***env = data, **k;
1499
1500         assert(filename);
1501         assert(lvalue);
1502         assert(rvalue);
1503         assert(data);
1504
1505         if (!path_is_absolute(rvalue[0] == '-' ? rvalue + 1 : rvalue)) {
1506                 log_error("[%s:%u] Path '%s' is not absolute, ignoring.", filename, line, rvalue);
1507                 return 0;
1508         }
1509
1510         if (!(k = strv_append(*env, rvalue)))
1511                 return -ENOMEM;
1512
1513         strv_free(*env);
1514         *env = k;
1515
1516         return 0;
1517 }
1518
1519 static int config_parse_ip_tos(
1520                 const char *filename,
1521                 unsigned line,
1522                 const char *section,
1523                 const char *lvalue,
1524                 int ltype,
1525                 const char *rvalue,
1526                 void *data,
1527                 void *userdata) {
1528
1529         int *ip_tos = data, x;
1530
1531         assert(filename);
1532         assert(lvalue);
1533         assert(rvalue);
1534         assert(data);
1535
1536         if ((x = ip_tos_from_string(rvalue)) < 0)
1537                 if (safe_atoi(rvalue, &x) < 0) {
1538                         log_error("[%s:%u] Failed to parse IP TOS value, ignoring: %s", filename, line, rvalue);
1539                         return 0;
1540                 }
1541
1542         *ip_tos = x;
1543         return 0;
1544 }
1545
1546 static int config_parse_condition_path(
1547                 const char *filename,
1548                 unsigned line,
1549                 const char *section,
1550                 const char *lvalue,
1551                 int ltype,
1552                 const char *rvalue,
1553                 void *data,
1554                 void *userdata) {
1555
1556         ConditionType cond = ltype;
1557         Unit *u = data;
1558         bool trigger, negate;
1559         Condition *c;
1560
1561         assert(filename);
1562         assert(lvalue);
1563         assert(rvalue);
1564         assert(data);
1565
1566         if ((trigger = rvalue[0] == '|'))
1567                 rvalue++;
1568
1569         if ((negate = rvalue[0] == '!'))
1570                 rvalue++;
1571
1572         if (!path_is_absolute(rvalue)) {
1573                 log_error("[%s:%u] Path in condition not absolute, ignoring: %s", filename, line, rvalue);
1574                 return 0;
1575         }
1576
1577         if (!(c = condition_new(cond, rvalue, trigger, negate)))
1578                 return -ENOMEM;
1579
1580         LIST_PREPEND(Condition, conditions, u->meta.conditions, c);
1581         return 0;
1582 }
1583
1584 static int config_parse_condition_string(
1585                 const char *filename,
1586                 unsigned line,
1587                 const char *section,
1588                 const char *lvalue,
1589                 int ltype,
1590                 const char *rvalue,
1591                 void *data,
1592                 void *userdata) {
1593
1594         ConditionType cond = ltype;
1595         Unit *u = data;
1596         bool trigger, negate;
1597         Condition *c;
1598
1599         assert(filename);
1600         assert(lvalue);
1601         assert(rvalue);
1602         assert(data);
1603
1604         if ((trigger = rvalue[0] == '|'))
1605                 rvalue++;
1606
1607         if ((negate = rvalue[0] == '!'))
1608                 rvalue++;
1609
1610         if (!(c = condition_new(cond, rvalue, trigger, negate)))
1611                 return -ENOMEM;
1612
1613         LIST_PREPEND(Condition, conditions, u->meta.conditions, c);
1614         return 0;
1615 }
1616
1617 static int config_parse_condition_null(
1618                 const char *filename,
1619                 unsigned line,
1620                 const char *section,
1621                 const char *lvalue,
1622                 int ltype,
1623                 const char *rvalue,
1624                 void *data,
1625                 void *userdata) {
1626
1627         Unit *u = data;
1628         Condition *c;
1629         bool trigger, negate;
1630         int b;
1631
1632         assert(filename);
1633         assert(lvalue);
1634         assert(rvalue);
1635         assert(data);
1636
1637         if ((trigger = rvalue[0] == '|'))
1638                 rvalue++;
1639
1640         if ((negate = rvalue[0] == '!'))
1641                 rvalue++;
1642
1643         if ((b = parse_boolean(rvalue)) < 0) {
1644                 log_error("[%s:%u] Failed to parse boolean value in condition, ignoring: %s", filename, line, rvalue);
1645                 return 0;
1646         }
1647
1648         if (!b)
1649                 negate = !negate;
1650
1651         if (!(c = condition_new(CONDITION_NULL, NULL, trigger, negate)))
1652                 return -ENOMEM;
1653
1654         LIST_PREPEND(Condition, conditions, u->meta.conditions, c);
1655         return 0;
1656 }
1657
1658 static DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier");
1659
1660 #define FOLLOW_MAX 8
1661
1662 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
1663         unsigned c = 0;
1664         int fd, r;
1665         FILE *f;
1666         char *id = NULL;
1667
1668         assert(filename);
1669         assert(*filename);
1670         assert(_f);
1671         assert(names);
1672
1673         /* This will update the filename pointer if the loaded file is
1674          * reached by a symlink. The old string will be freed. */
1675
1676         for (;;) {
1677                 char *target, *name;
1678
1679                 if (c++ >= FOLLOW_MAX)
1680                         return -ELOOP;
1681
1682                 path_kill_slashes(*filename);
1683
1684                 /* Add the file name we are currently looking at to
1685                  * the names of this unit, but only if it is a valid
1686                  * unit name. */
1687                 name = file_name_from_path(*filename);
1688
1689                 if (unit_name_is_valid(name, true)) {
1690
1691                         id = set_get(names, name);
1692                         if (!id) {
1693                                 id = strdup(name);
1694                                 if (!id)
1695                                         return -ENOMEM;
1696
1697                                 r = set_put(names, id);
1698                                 if (r < 0) {
1699                                         free(id);
1700                                         return r;
1701                                 }
1702                         }
1703                 }
1704
1705                 /* Try to open the file name, but don't if its a symlink */
1706                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
1707                         break;
1708
1709                 if (errno != ELOOP)
1710                         return -errno;
1711
1712                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
1713                 if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
1714                         return r;
1715
1716                 free(*filename);
1717                 *filename = target;
1718         }
1719
1720         if (!(f = fdopen(fd, "re"))) {
1721                 r = -errno;
1722                 close_nointr_nofail(fd);
1723                 return r;
1724         }
1725
1726         *_f = f;
1727         *_final = id;
1728         return 0;
1729 }
1730
1731 static int merge_by_names(Unit **u, Set *names, const char *id) {
1732         char *k;
1733         int r;
1734
1735         assert(u);
1736         assert(*u);
1737         assert(names);
1738
1739         /* Let's try to add in all symlink names we found */
1740         while ((k = set_steal_first(names))) {
1741
1742                 /* First try to merge in the other name into our
1743                  * unit */
1744                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1745                         Unit *other;
1746
1747                         /* Hmm, we couldn't merge the other unit into
1748                          * ours? Then let's try it the other way
1749                          * round */
1750
1751                         other = manager_get_unit((*u)->meta.manager, k);
1752                         free(k);
1753
1754                         if (other)
1755                                 if ((r = unit_merge(other, *u)) >= 0) {
1756                                         *u = other;
1757                                         return merge_by_names(u, names, NULL);
1758                                 }
1759
1760                         return r;
1761                 }
1762
1763                 if (id == k)
1764                         unit_choose_id(*u, id);
1765
1766                 free(k);
1767         }
1768
1769         return 0;
1770 }
1771
1772 static void dump_items(FILE *f, const ConfigItem *items) {
1773         const ConfigItem *i;
1774         const char *prev_section = NULL;
1775         bool not_first = false;
1776
1777         struct {
1778                 ConfigParserCallback callback;
1779                 const char *rvalue;
1780         } table[] = {
1781                 { config_parse_int,              "INTEGER" },
1782                 { config_parse_unsigned,         "UNSIGNED" },
1783                 { config_parse_size,             "SIZE" },
1784                 { config_parse_bool,             "BOOLEAN" },
1785                 { config_parse_string,           "STRING" },
1786                 { config_parse_path,             "PATH" },
1787                 { config_parse_path_printf,      "PATH" },
1788                 { config_parse_strv,             "STRING [...]" },
1789                 { config_parse_nice,             "NICE" },
1790                 { config_parse_oom_score_adjust, "OOMSCOREADJUST" },
1791                 { config_parse_io_class,         "IOCLASS" },
1792                 { config_parse_io_priority,      "IOPRIORITY" },
1793                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1794                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1795                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1796                 { config_parse_mode,             "MODE" },
1797                 { config_parse_env_file,         "FILE" },
1798                 { config_parse_output,           "OUTPUT" },
1799                 { config_parse_input,            "INPUT" },
1800                 { config_parse_facility,         "FACILITY" },
1801                 { config_parse_level,            "LEVEL" },
1802                 { config_parse_capabilities,     "CAPABILITIES" },
1803                 { config_parse_secure_bits,      "SECUREBITS" },
1804                 { config_parse_bounding_set,     "BOUNDINGSET" },
1805                 { config_parse_timer_slack_nsec, "TIMERSLACK" },
1806                 { config_parse_limit,            "LIMIT" },
1807                 { config_parse_cgroup,           "CGROUP [...]" },
1808                 { config_parse_deps,             "UNIT [...]" },
1809                 { config_parse_names,            "UNIT [...]" },
1810                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1811                 { config_parse_service_type,     "SERVICETYPE" },
1812                 { config_parse_service_restart,  "SERVICERESTART" },
1813 #ifdef HAVE_SYSV_COMPAT
1814                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1815 #else
1816                 { config_parse_warn_compat,      "NOTSUPPORTED" },
1817 #endif
1818                 { config_parse_kill_mode,        "KILLMODE" },
1819                 { config_parse_kill_signal,      "SIGNAL" },
1820                 { config_parse_listen,           "SOCKET [...]" },
1821                 { config_parse_socket_bind,      "SOCKETBIND" },
1822                 { config_parse_bindtodevice,     "NETWORKINTERFACE" },
1823                 { config_parse_usec,             "SECONDS" },
1824                 { config_parse_path_strv,        "PATH [...]" },
1825                 { config_parse_mount_flags,      "MOUNTFLAG [...]" },
1826                 { config_parse_string_printf,    "STRING" },
1827                 { config_parse_timer,            "TIMER" },
1828                 { config_parse_timer_unit,       "NAME" },
1829                 { config_parse_path_spec,        "PATH" },
1830                 { config_parse_path_unit,        "UNIT" },
1831                 { config_parse_notify_access,    "ACCESS" },
1832                 { config_parse_ip_tos,           "TOS" },
1833                 { config_parse_condition_path,   "CONDITION" },
1834                 { config_parse_condition_string, "CONDITION" },
1835                 { config_parse_condition_null,   "CONDITION" },
1836         };
1837
1838         assert(f);
1839         assert(items);
1840
1841         for (i = items; i->lvalue; i++) {
1842                 unsigned j;
1843                 const char *rvalue = "OTHER";
1844
1845                 if (!streq_ptr(i->section, prev_section)) {
1846                         if (!not_first)
1847                                 not_first = true;
1848                         else
1849                                 fputc('\n', f);
1850
1851                         fprintf(f, "[%s]\n", i->section);
1852                         prev_section = i->section;
1853                 }
1854
1855                 for (j = 0; j < ELEMENTSOF(table); j++)
1856                         if (i->parse == table[j].callback) {
1857                                 rvalue = table[j].rvalue;
1858                                 break;
1859                         }
1860
1861                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1862         }
1863 }
1864
1865 static int load_from_path(Unit *u, const char *path) {
1866
1867         static const char* const section_table[_UNIT_TYPE_MAX] = {
1868                 [UNIT_SERVICE]   = "Service",
1869                 [UNIT_TIMER]     = "Timer",
1870                 [UNIT_SOCKET]    = "Socket",
1871                 [UNIT_TARGET]    = "Target",
1872                 [UNIT_DEVICE]    = "Device",
1873                 [UNIT_MOUNT]     = "Mount",
1874                 [UNIT_AUTOMOUNT] = "Automount",
1875                 [UNIT_SNAPSHOT]  = "Snapshot",
1876                 [UNIT_SWAP]      = "Swap",
1877                 [UNIT_PATH]      = "Path"
1878         };
1879
1880 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1881                 { "WorkingDirectory",       config_parse_path_printf,     0, &(context).working_directory,                    section   }, \
1882                 { "RootDirectory",          config_parse_path_printf,     0, &(context).root_directory,                       section   }, \
1883                 { "User",                   config_parse_string_printf,   0, &(context).user,                                 section   }, \
1884                 { "Group",                  config_parse_string_printf,   0, &(context).group,                                section   }, \
1885                 { "SupplementaryGroups",    config_parse_strv,            0, &(context).supplementary_groups,                 section   }, \
1886                 { "Nice",                   config_parse_nice,            0, &(context),                                      section   }, \
1887                 { "OOMScoreAdjust",         config_parse_oom_score_adjust,0, &(context),                                      section   }, \
1888                 { "IOSchedulingClass",      config_parse_io_class,        0, &(context),                                      section   }, \
1889                 { "IOSchedulingPriority",   config_parse_io_priority,     0, &(context),                                      section   }, \
1890                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,0, &(context),                                      section   }, \
1891                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  0, &(context),                                      section   }, \
1892                 { "CPUSchedulingResetOnFork", config_parse_bool,          0, &(context).cpu_sched_reset_on_fork,              section   }, \
1893                 { "CPUAffinity",            config_parse_cpu_affinity,    0, &(context),                                      section   }, \
1894                 { "UMask",                  config_parse_mode,            0, &(context).umask,                                section   }, \
1895                 { "Environment",            config_parse_strv,            0, &(context).environment,                          section   }, \
1896                 { "EnvironmentFile",        config_parse_env_file,        0, &(context).environment_files,                    section   }, \
1897                 { "StandardInput",          config_parse_input,           0, &(context).std_input,                            section   }, \
1898                 { "StandardOutput",         config_parse_output,          0, &(context).std_output,                           section   }, \
1899                 { "StandardError",          config_parse_output,          0, &(context).std_error,                            section   }, \
1900                 { "TTYPath",                config_parse_path_printf,     0, &(context).tty_path,                             section   }, \
1901                 { "TTYReset",               config_parse_bool,            0, &(context).tty_reset,                            section   }, \
1902                 { "TTYVHangup",             config_parse_bool,            0, &(context).tty_vhangup,                          section   }, \
1903                 { "TTYVTDisallocate",       config_parse_bool,            0, &(context).tty_vt_disallocate,                   section   }, \
1904                 { "SyslogIdentifier",       config_parse_string_printf,   0, &(context).syslog_identifier,                    section   }, \
1905                 { "SyslogFacility",         config_parse_facility,        0, &(context).syslog_priority,                      section   }, \
1906                 { "SyslogLevel",            config_parse_level,           0, &(context).syslog_priority,                      section   }, \
1907                 { "SyslogLevelPrefix",      config_parse_bool,            0, &(context).syslog_level_prefix,                  section   }, \
1908                 { "Capabilities",           config_parse_capabilities,    0, &(context),                                      section   }, \
1909                 { "SecureBits",             config_parse_secure_bits,     0, &(context),                                      section   }, \
1910                 { "CapabilityBoundingSet",  config_parse_bounding_set,    0, &(context),                                      section   }, \
1911                 { "TimerSlackNSec",         config_parse_timer_slack_nsec,0, &(context),                                      section   }, \
1912                 { "LimitCPU",               config_parse_limit,           0, &(context).rlimit[RLIMIT_CPU],                   section   }, \
1913                 { "LimitFSIZE",             config_parse_limit,           0, &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1914                 { "LimitDATA",              config_parse_limit,           0, &(context).rlimit[RLIMIT_DATA],                  section   }, \
1915                 { "LimitSTACK",             config_parse_limit,           0, &(context).rlimit[RLIMIT_STACK],                 section   }, \
1916                 { "LimitCORE",              config_parse_limit,           0, &(context).rlimit[RLIMIT_CORE],                  section   }, \
1917                 { "LimitRSS",               config_parse_limit,           0, &(context).rlimit[RLIMIT_RSS],                   section   }, \
1918                 { "LimitNOFILE",            config_parse_limit,           0, &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1919                 { "LimitAS",                config_parse_limit,           0, &(context).rlimit[RLIMIT_AS],                    section   }, \
1920                 { "LimitNPROC",             config_parse_limit,           0, &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1921                 { "LimitMEMLOCK",           config_parse_limit,           0, &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1922                 { "LimitLOCKS",             config_parse_limit,           0, &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1923                 { "LimitSIGPENDING",        config_parse_limit,           0, &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1924                 { "LimitMSGQUEUE",          config_parse_limit,           0, &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1925                 { "LimitNICE",              config_parse_limit,           0, &(context).rlimit[RLIMIT_NICE],                  section   }, \
1926                 { "LimitRTPRIO",            config_parse_limit,           0, &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1927                 { "LimitRTTIME",            config_parse_limit,           0, &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1928                 { "ControlGroup",           config_parse_cgroup,          0, u,                                               section   }, \
1929                 { "ReadWriteDirectories",   config_parse_path_strv,       0, &(context).read_write_dirs,                      section   }, \
1930                 { "ReadOnlyDirectories",    config_parse_path_strv,       0, &(context).read_only_dirs,                       section   }, \
1931                 { "InaccessibleDirectories",config_parse_path_strv,       0, &(context).inaccessible_dirs,                    section   }, \
1932                 { "PrivateTmp",             config_parse_bool,            0, &(context).private_tmp,                          section   }, \
1933                 { "MountFlags",             config_parse_mount_flags,     0, &(context),                                      section   }, \
1934                 { "TCPWrapName",            config_parse_string_printf,   0, &(context).tcpwrap_name,                         section   }, \
1935                 { "PAMName",                config_parse_string_printf,   0, &(context).pam_name,                             section   }, \
1936                 { "KillMode",               config_parse_kill_mode,       0, &(context).kill_mode,                            section   }, \
1937                 { "KillSignal",             config_parse_kill_signal,     0, &(context).kill_signal,                          section   }, \
1938                 { "SendSIGKILL",            config_parse_bool,            0, &(context).send_sigkill,                         section   }, \
1939                 { "UtmpIdentifier",         config_parse_string_printf,   0, &(context).utmp_id,                              section   }, \
1940                 { "ControlGroupModify",     config_parse_bool,            0, &(context).control_group_modify,                 section   }
1941
1942         const ConfigItem items[] = {
1943                 { "Names",                  config_parse_names,           0, u,                                               "Unit"    },
1944                 { "Description",            config_parse_string_printf,   0, &u->meta.description,                            "Unit"    },
1945                 { "Requires",               config_parse_deps,            0, UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1946                 { "RequiresOverridable",    config_parse_deps,            0, UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1947                 { "Requisite",              config_parse_deps,            0, UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1948                 { "RequisiteOverridable",   config_parse_deps,            0, UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1949                 { "Wants",                  config_parse_deps,            0, UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1950                 { "BindTo",                 config_parse_deps,            0, UINT_TO_PTR(UNIT_BIND_TO),                       "Unit"    },
1951                 { "Conflicts",              config_parse_deps,            0, UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1952                 { "Before",                 config_parse_deps,            0, UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1953                 { "After",                  config_parse_deps,            0, UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1954                 { "OnFailure",              config_parse_deps,            0, UINT_TO_PTR(UNIT_ON_FAILURE),                    "Unit"    },
1955                 { "StopWhenUnneeded",       config_parse_bool,            0, &u->meta.stop_when_unneeded,                     "Unit"    },
1956                 { "RefuseManualStart",      config_parse_bool,            0, &u->meta.refuse_manual_start,                    "Unit"    },
1957                 { "RefuseManualStop",       config_parse_bool,            0, &u->meta.refuse_manual_stop,                     "Unit"    },
1958                 { "AllowIsolate",           config_parse_bool,            0, &u->meta.allow_isolate,                          "Unit"    },
1959                 { "DefaultDependencies",    config_parse_bool,            0, &u->meta.default_dependencies,                   "Unit"    },
1960                 { "OnFailureIsolate",       config_parse_bool,            0, &u->meta.on_failure_isolate,                     "Unit"    },
1961                 { "IgnoreOnIsolate",        config_parse_bool,            0, &u->meta.ignore_on_isolate,                      "Unit"    },
1962                 { "IgnoreOnSnapshot",       config_parse_bool,            0, &u->meta.ignore_on_snapshot,                     "Unit"    },
1963                 { "JobTimeoutSec",          config_parse_usec,            0, &u->meta.job_timeout,                            "Unit"    },
1964                 { "ConditionPathExists",        config_parse_condition_path, CONDITION_PATH_EXISTS, u,                        "Unit"    },
1965                 { "ConditionPathIsDirectory",   config_parse_condition_path, CONDITION_PATH_IS_DIRECTORY, u,                  "Unit"    },
1966                 { "ConditionDirectoryNotEmpty", config_parse_condition_path, CONDITION_DIRECTORY_NOT_EMPTY, u,                "Unit"    },
1967                 { "ConditionKernelCommandLine", config_parse_condition_string, CONDITION_KERNEL_COMMAND_LINE, u,              "Unit"    },
1968                 { "ConditionVirtualization",    config_parse_condition_string, CONDITION_VIRTUALIZATION, u,                   "Unit"    },
1969                 { "ConditionSecurity",          config_parse_condition_string, CONDITION_SECURITY, u,                         "Unit"    },
1970                 { "ConditionNull",          config_parse_condition_null,  0, u,                                               "Unit"    },
1971
1972                 { "PIDFile",                config_parse_path_printf,     0, &u->service.pid_file,                            "Service" },
1973                 { "ExecStartPre",           config_parse_exec,            0, u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1974                 { "ExecStart",              config_parse_exec,            0, u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1975                 { "ExecStartPost",          config_parse_exec,            0, u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1976                 { "ExecReload",             config_parse_exec,            0, u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1977                 { "ExecStop",               config_parse_exec,            0, u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1978                 { "ExecStopPost",           config_parse_exec,            0, u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1979                 { "RestartSec",             config_parse_usec,            0, &u->service.restart_usec,                        "Service" },
1980                 { "TimeoutSec",             config_parse_usec,            0, &u->service.timeout_usec,                        "Service" },
1981                 { "Type",                   config_parse_service_type,    0, &u->service.type,                                "Service" },
1982                 { "Restart",                config_parse_service_restart, 0, &u->service.restart,                             "Service" },
1983                 { "PermissionsStartOnly",   config_parse_bool,            0, &u->service.permissions_start_only,              "Service" },
1984                 { "RootDirectoryStartOnly", config_parse_bool,            0, &u->service.root_directory_start_only,           "Service" },
1985                 { "RemainAfterExit",        config_parse_bool,            0, &u->service.remain_after_exit,                   "Service" },
1986                 { "GuessMainPID",           config_parse_bool,            0, &u->service.guess_main_pid,                      "Service" },
1987 #ifdef HAVE_SYSV_COMPAT
1988                 { "SysVStartPriority",      config_parse_sysv_priority,   0, &u->service.sysv_start_priority,                 "Service" },
1989 #else
1990                 { "SysVStartPriority",      config_parse_warn_compat,     0, NULL,                                            "Service" },
1991 #endif
1992                 { "NonBlocking",            config_parse_bool,            0, &u->service.exec_context.non_blocking,           "Service" },
1993                 { "BusName",                config_parse_string_printf,   0, &u->service.bus_name,                            "Service" },
1994                 { "NotifyAccess",           config_parse_notify_access,   0, &u->service.notify_access,                       "Service" },
1995                 { "Sockets",                config_parse_service_sockets, 0, &u->service,                                     "Service" },
1996                 { "FsckPassNo",             config_parse_fsck_passno,     0, &u->service.fsck_passno,                         "Service" },
1997                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1998
1999                 { "ListenStream",           config_parse_listen,          0, &u->socket,                                      "Socket"  },
2000                 { "ListenDatagram",         config_parse_listen,          0, &u->socket,                                      "Socket"  },
2001                 { "ListenSequentialPacket", config_parse_listen,          0, &u->socket,                                      "Socket"  },
2002                 { "ListenFIFO",             config_parse_listen,          0, &u->socket,                                      "Socket"  },
2003                 { "ListenNetlink",          config_parse_listen,          0, &u->socket,                                      "Socket"  },
2004                 { "ListenSpecial",          config_parse_listen,          0, &u->socket,                                      "Socket"  },
2005                 { "ListenMessageQueue",     config_parse_listen,          0, &u->socket,                                      "Socket"  },
2006                 { "BindIPv6Only",           config_parse_socket_bind,     0, &u->socket,                                      "Socket"  },
2007                 { "Backlog",                config_parse_unsigned,        0, &u->socket.backlog,                              "Socket"  },
2008                 { "BindToDevice",           config_parse_bindtodevice,    0, &u->socket,                                      "Socket"  },
2009                 { "ExecStartPre",           config_parse_exec,            0, u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
2010                 { "ExecStartPost",          config_parse_exec,            0, u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
2011                 { "ExecStopPre",            config_parse_exec,            0, u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
2012                 { "ExecStopPost",           config_parse_exec,            0, u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
2013                 { "TimeoutSec",             config_parse_usec,            0, &u->socket.timeout_usec,                         "Socket"  },
2014                 { "DirectoryMode",          config_parse_mode,            0, &u->socket.directory_mode,                       "Socket"  },
2015                 { "SocketMode",             config_parse_mode,            0, &u->socket.socket_mode,                          "Socket"  },
2016                 { "Accept",                 config_parse_bool,            0, &u->socket.accept,                               "Socket"  },
2017                 { "MaxConnections",         config_parse_unsigned,        0, &u->socket.max_connections,                      "Socket"  },
2018                 { "KeepAlive",              config_parse_bool,            0, &u->socket.keep_alive,                           "Socket"  },
2019                 { "Priority",               config_parse_int,             0, &u->socket.priority,                             "Socket"  },
2020                 { "ReceiveBuffer",          config_parse_size,            0, &u->socket.receive_buffer,                       "Socket"  },
2021                 { "SendBuffer",             config_parse_size,            0, &u->socket.send_buffer,                          "Socket"  },
2022                 { "IPTOS",                  config_parse_ip_tos,          0, &u->socket.ip_tos,                               "Socket"  },
2023                 { "IPTTL",                  config_parse_int,             0, &u->socket.ip_ttl,                               "Socket"  },
2024                 { "Mark",                   config_parse_int,             0, &u->socket.mark,                                 "Socket"  },
2025                 { "PipeSize",               config_parse_size,            0, &u->socket.pipe_size,                            "Socket"  },
2026                 { "FreeBind",               config_parse_bool,            0, &u->socket.free_bind,                            "Socket"  },
2027                 { "Transparent",            config_parse_bool,            0, &u->socket.transparent,                          "Socket"  },
2028                 { "Broadcast",              config_parse_bool,            0, &u->socket.broadcast,                            "Socket"  },
2029                 { "TCPCongestion",          config_parse_string,          0, &u->socket.tcp_congestion,                       "Socket"  },
2030                 { "MessageQueueMaxMessages", config_parse_long,           0, &u->socket.mq_maxmsg,                            "Socket"  },
2031                 { "MessageQueueMessageSize", config_parse_long,           0, &u->socket.mq_msgsize,                           "Socket"  },
2032                 { "Service",                config_parse_socket_service,  0, &u->socket,                                      "Socket"  },
2033                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
2034
2035                 { "What",                   config_parse_string,          0, &u->mount.parameters_fragment.what,              "Mount"   },
2036                 { "Where",                  config_parse_path,            0, &u->mount.where,                                 "Mount"   },
2037                 { "Options",                config_parse_string,          0, &u->mount.parameters_fragment.options,           "Mount"   },
2038                 { "Type",                   config_parse_string,          0, &u->mount.parameters_fragment.fstype,            "Mount"   },
2039                 { "TimeoutSec",             config_parse_usec,            0, &u->mount.timeout_usec,                          "Mount"   },
2040                 { "DirectoryMode",          config_parse_mode,            0, &u->mount.directory_mode,                        "Mount"   },
2041                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
2042
2043                 { "Where",                  config_parse_path,            0, &u->automount.where,                             "Automount" },
2044                 { "DirectoryMode",          config_parse_mode,            0, &u->automount.directory_mode,                    "Automount" },
2045
2046                 { "What",                   config_parse_path,            0, &u->swap.parameters_fragment.what,               "Swap"    },
2047                 { "Priority",               config_parse_int,             0, &u->swap.parameters_fragment.priority,           "Swap"    },
2048                 { "TimeoutSec",             config_parse_usec,            0, &u->swap.timeout_usec,                           "Swap"    },
2049                 EXEC_CONTEXT_CONFIG_ITEMS(u->swap.exec_context, "Swap"),
2050
2051                 { "OnActiveSec",            config_parse_timer,           0, &u->timer,                                       "Timer"   },
2052                 { "OnBootSec",              config_parse_timer,           0, &u->timer,                                       "Timer"   },
2053                 { "OnStartupSec",           config_parse_timer,           0, &u->timer,                                       "Timer"   },
2054                 { "OnUnitActiveSec",        config_parse_timer,           0, &u->timer,                                       "Timer"   },
2055                 { "OnUnitInactiveSec",      config_parse_timer,           0, &u->timer,                                       "Timer"   },
2056                 { "Unit",                   config_parse_timer_unit,      0, &u->timer,                                       "Timer"   },
2057
2058                 { "PathExists",             config_parse_path_spec,       0, &u->path,                                        "Path"    },
2059                 { "PathChanged",            config_parse_path_spec,       0, &u->path,                                        "Path"    },
2060                 { "DirectoryNotEmpty",      config_parse_path_spec,       0, &u->path,                                        "Path"    },
2061                 { "Unit",                   config_parse_path_unit,       0, &u->path,                                        "Path"    },
2062                 { "MakeDirectory",          config_parse_bool,            0, &u->path.make_directory,                         "Path"    },
2063                 { "DirectoryMode",          config_parse_mode,            0, &u->path.directory_mode,                         "Path"    },
2064
2065                 /* The [Install] section is ignored here. */
2066                 { "Alias",                  NULL,                         0, NULL,                                            "Install" },
2067                 { "WantedBy",               NULL,                         0, NULL,                                            "Install" },
2068                 { "Also",                   NULL,                         0, NULL,                                            "Install" },
2069
2070                 { NULL, NULL, 0, NULL, NULL }
2071         };
2072
2073 #undef EXEC_CONTEXT_CONFIG_ITEMS
2074
2075         const char *sections[4];
2076         int r;
2077         Set *symlink_names;
2078         FILE *f = NULL;
2079         char *filename = NULL, *id = NULL;
2080         Unit *merged;
2081         struct stat st;
2082
2083         if (!u) {
2084                 /* Dirty dirty hack. */
2085                 dump_items((FILE*) path, items);
2086                 return 0;
2087         }
2088
2089         assert(u);
2090         assert(path);
2091
2092         sections[0] = "Unit";
2093         sections[1] = section_table[u->meta.type];
2094         sections[2] = "Install";
2095         sections[3] = NULL;
2096
2097         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
2098                 return -ENOMEM;
2099
2100         if (path_is_absolute(path)) {
2101
2102                 if (!(filename = strdup(path))) {
2103                         r = -ENOMEM;
2104                         goto finish;
2105                 }
2106
2107                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
2108                         free(filename);
2109                         filename = NULL;
2110
2111                         if (r != -ENOENT)
2112                                 goto finish;
2113                 }
2114
2115         } else  {
2116                 char **p;
2117
2118                 STRV_FOREACH(p, u->meta.manager->lookup_paths.unit_path) {
2119
2120                         /* Instead of opening the path right away, we manually
2121                          * follow all symlinks and add their name to our unit
2122                          * name set while doing so */
2123                         if (!(filename = path_make_absolute(path, *p))) {
2124                                 r = -ENOMEM;
2125                                 goto finish;
2126                         }
2127
2128                         if (u->meta.manager->unit_path_cache &&
2129                             !set_get(u->meta.manager->unit_path_cache, filename))
2130                                 r = -ENOENT;
2131                         else
2132                                 r = open_follow(&filename, &f, symlink_names, &id);
2133
2134                         if (r < 0) {
2135                                 char *sn;
2136
2137                                 free(filename);
2138                                 filename = NULL;
2139
2140                                 if (r != -ENOENT)
2141                                         goto finish;
2142
2143                                 /* Empty the symlink names for the next run */
2144                                 while ((sn = set_steal_first(symlink_names)))
2145                                         free(sn);
2146
2147                                 continue;
2148                         }
2149
2150                         break;
2151                 }
2152         }
2153
2154         if (!filename) {
2155                 /* Hmm, no suitable file found? */
2156                 r = 0;
2157                 goto finish;
2158         }
2159
2160         merged = u;
2161         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
2162                 goto finish;
2163
2164         if (merged != u) {
2165                 u->meta.load_state = UNIT_MERGED;
2166                 r = 0;
2167                 goto finish;
2168         }
2169
2170         zero(st);
2171         if (fstat(fileno(f), &st) < 0) {
2172                 r = -errno;
2173                 goto finish;
2174         }
2175
2176         if (null_or_empty(&st))
2177                 u->meta.load_state = UNIT_MASKED;
2178         else {
2179                 /* Now, parse the file contents */
2180                 if ((r = config_parse(filename, f, sections, items, false, u)) < 0)
2181                         goto finish;
2182
2183                 u->meta.load_state = UNIT_LOADED;
2184         }
2185
2186         free(u->meta.fragment_path);
2187         u->meta.fragment_path = filename;
2188         filename = NULL;
2189
2190         u->meta.fragment_mtime = timespec_load(&st.st_mtim);
2191
2192         r = 0;
2193
2194 finish:
2195         set_free_free(symlink_names);
2196         free(filename);
2197
2198         if (f)
2199                 fclose(f);
2200
2201         return r;
2202 }
2203
2204 int unit_load_fragment(Unit *u) {
2205         int r;
2206         Iterator i;
2207         const char *t;
2208
2209         assert(u);
2210         assert(u->meta.load_state == UNIT_STUB);
2211         assert(u->meta.id);
2212
2213         /* First, try to find the unit under its id. We always look
2214          * for unit files in the default directories, to make it easy
2215          * to override things by placing things in /etc/systemd/system */
2216         if ((r = load_from_path(u, u->meta.id)) < 0)
2217                 return r;
2218
2219         /* Try to find an alias we can load this with */
2220         if (u->meta.load_state == UNIT_STUB)
2221                 SET_FOREACH(t, u->meta.names, i) {
2222
2223                         if (t == u->meta.id)
2224                                 continue;
2225
2226                         if ((r = load_from_path(u, t)) < 0)
2227                                 return r;
2228
2229                         if (u->meta.load_state != UNIT_STUB)
2230                                 break;
2231                 }
2232
2233         /* And now, try looking for it under the suggested (originally linked) path */
2234         if (u->meta.load_state == UNIT_STUB && u->meta.fragment_path) {
2235
2236                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
2237                         return r;
2238
2239                 if (u->meta.load_state == UNIT_STUB) {
2240                         /* Hmm, this didn't work? Then let's get rid
2241                          * of the fragment path stored for us, so that
2242                          * we don't point to an invalid location. */
2243                         free(u->meta.fragment_path);
2244                         u->meta.fragment_path = NULL;
2245                 }
2246         }
2247
2248         /* Look for a template */
2249         if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
2250                 char *k;
2251
2252                 if (!(k = unit_name_template(u->meta.id)))
2253                         return -ENOMEM;
2254
2255                 r = load_from_path(u, k);
2256                 free(k);
2257
2258                 if (r < 0)
2259                         return r;
2260
2261                 if (u->meta.load_state == UNIT_STUB)
2262                         SET_FOREACH(t, u->meta.names, i) {
2263
2264                                 if (t == u->meta.id)
2265                                         continue;
2266
2267                                 if (!(k = unit_name_template(t)))
2268                                         return -ENOMEM;
2269
2270                                 r = load_from_path(u, k);
2271                                 free(k);
2272
2273                                 if (r < 0)
2274                                         return r;
2275
2276                                 if (u->meta.load_state != UNIT_STUB)
2277                                         break;
2278                         }
2279         }
2280
2281         return 0;
2282 }
2283
2284 void unit_dump_config_items(FILE *f) {
2285         /* OK, this wins a prize for extreme ugliness. */
2286
2287         load_from_path(NULL, (const void*) f);
2288 }