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