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