load-fragment.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2010 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU General Public License as published by
  10   the Free Software Foundation; either version 2 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <linux/oom.h>
  23 #include <assert.h>
  24 #include <errno.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include <fcntl.h>
  28 #include <sched.h>
  29 #include <sys/prctl.h>
  30 #include <sys/mount.h>
  31
  32 #include "unit.h"
  33 #include "strv.h"
  34 #include "conf-parser.h"
  35 #include "load-fragment.h"
  36 #include "log.h"
  37 #include "ioprio.h"
  38 #include "securebits.h"
  39 #include "missing.h"
  40 #include "unit-name.h"
  41
  42 #define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg)                \
  43         static int function(                                            \
  44                         const char *filename,                           \
  45                         unsigned line,                                  \
  46                         const char *section,                            \
  47                         const char *lvalue,                             \
  48                         const char *rvalue,                             \
  49                         void *data,                                     \
  50                         void *userdata) {                               \
  51                                                                         \
  52                 type *i = data, x;                                      \
  53                                                                         \
  54                 assert(filename);                                       \
  55                 assert(lvalue);                                         \
  56                 assert(rvalue);                                         \
  57                 assert(data);                                           \
  58                                                                         \
  59                 if ((x = name##_from_string(rvalue)) < 0) {             \
  60                         log_error("[%s:%u] " msg ": %s", filename, line, rvalue); \
  61                         return -EBADMSG;                                \
  62                 }                                                       \
  63                                                                         \
  64                 *i = x;                                                 \
  65                                                                         \
  66                 return 0;                                               \
  67         }
  68
  69 static int config_parse_deps(
  70                 const char *filename,
  71                 unsigned line,
  72                 const char *section,
  73                 const char *lvalue,
  74                 const char *rvalue,
  75                 void *data,
  76                 void *userdata) {
  77
  78         UnitDependency d = PTR_TO_UINT(data);
  79         Unit *u = userdata;
  80         char *w;
  81         size_t l;
  82         char *state;
  83
  84         assert(filename);
  85         assert(lvalue);
  86         assert(rvalue);
  87
  88         FOREACH_WORD(w, l, rvalue, state) {
  89                 char *t, *k;
  90                 int r;
  91
  92                 if (!(t = strndup(w, l)))
  93                         return -ENOMEM;
  94
  95                 k = unit_name_printf(u, t);
  96                 free(t);
  97
  98                 if (!k)
  99                         return -ENOMEM;
 100
 101                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
 102                 free(k);
 103
 104                 if (r < 0)
 105                         return r;
 106         }
 107
 108         return 0;
 109 }
 110
 111 static int config_parse_names(
 112                 const char *filename,
 113                 unsigned line,
 114                 const char *section,
 115                 const char *lvalue,
 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(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                 free(k);
 145
 146                 if (r < 0)
 147                         return r;
 148         }
 149
 150         return 0;
 151 }
 152
 153 static int config_parse_listen(
 154                 const char *filename,
 155                 unsigned line,
 156                 const char *section,
 157                 const char *lvalue,
 158                 const char *rvalue,
 159                 void *data,
 160                 void *userdata) {
 161
 162         int r;
 163         SocketPort *p;
 164         Socket *s;
 165
 166         assert(filename);
 167         assert(lvalue);
 168         assert(rvalue);
 169         assert(data);
 170
 171         s = (Socket*) data;
 172
 173         if (!(p = new0(SocketPort, 1)))
 174                 return -ENOMEM;
 175
 176         if (streq(lvalue, "ListenFIFO")) {
 177                 p->type = SOCKET_FIFO;
 178
 179                 if (!(p->path = strdup(rvalue))) {
 180                         free(p);
 181                         return -ENOMEM;
 182                 }
 183         } else {
 184                 p->type = SOCKET_SOCKET;
 185
 186                 if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
 187                         log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
 188                         free(p);
 189                         return r;
 190                 }
 191
 192                 if (streq(lvalue, "ListenStream"))
 193                         p->address.type = SOCK_STREAM;
 194                 else if (streq(lvalue, "ListenDatagram"))
 195                         p->address.type = SOCK_DGRAM;
 196                 else {
 197                         assert(streq(lvalue, "ListenSequentialPacket"));
 198                         p->address.type = SOCK_SEQPACKET;
 199                 }
 200
 201                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
 202                         free(p);
 203                         return -EPROTONOSUPPORT;
 204                 }
 205         }
 206
 207         p->fd = -1;
 208         LIST_PREPEND(SocketPort, port, s->ports, p);
 209
 210         return 0;
 211 }
 212
 213 static int config_parse_socket_bind(
 214                 const char *filename,
 215                 unsigned line,
 216                 const char *section,
 217                 const char *lvalue,
 218                 const char *rvalue,
 219                 void *data,
 220                 void *userdata) {
 221
 222         int r;
 223         Socket *s;
 224
 225         assert(filename);
 226         assert(lvalue);
 227         assert(rvalue);
 228         assert(data);
 229
 230         s = (Socket*) data;
 231
 232         if ((r = parse_boolean(rvalue)) < 0) {
 233                 log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
 234                 return r;
 235         }
 236
 237         s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
 238
 239         return 0;
 240 }
 241
 242 static int config_parse_nice(
 243                 const char *filename,
 244                 unsigned line,
 245                 const char *section,
 246                 const char *lvalue,
 247                 const char *rvalue,
 248                 void *data,
 249                 void *userdata) {
 250
 251         ExecContext *c = data;
 252         int priority, r;
 253
 254         assert(filename);
 255         assert(lvalue);
 256         assert(rvalue);
 257         assert(data);
 258
 259         if ((r = safe_atoi(rvalue, &priority)) < 0) {
 260                 log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
 261                 return r;
 262         }
 263
 264         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
 265                 log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
 266                 return -ERANGE;
 267         }
 268
 269         c->nice = priority;
 270         c->nice_set = false;
 271
 272         return 0;
 273 }
 274
 275 static int config_parse_oom_adjust(
 276                 const char *filename,
 277                 unsigned line,
 278                 const char *section,
 279                 const char *lvalue,
 280                 const char *rvalue,
 281                 void *data,
 282                 void *userdata) {
 283
 284         ExecContext *c = data;
 285         int oa, r;
 286
 287         assert(filename);
 288         assert(lvalue);
 289         assert(rvalue);
 290         assert(data);
 291
 292         if ((r = safe_atoi(rvalue, &oa)) < 0) {
 293                 log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
 294                 return r;
 295         }
 296
 297         if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
 298                 log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
 299                 return -ERANGE;
 300         }
 301
 302         c->oom_adjust = oa;
 303         c->oom_adjust_set = true;
 304
 305         return 0;
 306 }
 307
 308 static int config_parse_mode(
 309                 const char *filename,
 310                 unsigned line,
 311                 const char *section,
 312                 const char *lvalue,
 313                 const char *rvalue,
 314                 void *data,
 315                 void *userdata) {
 316
 317         mode_t *m = data;
 318         long l;
 319         char *x = NULL;
 320
 321         assert(filename);
 322         assert(lvalue);
 323         assert(rvalue);
 324         assert(data);
 325
 326         errno = 0;
 327         l = strtol(rvalue, &x, 8);
 328         if (!x || *x || errno) {
 329                 log_error("[%s:%u] Failed to parse mode value: %s", filename, line, rvalue);
 330                 return errno ? -errno : -EINVAL;
 331         }
 332
 333         if (l < 0000 || l > 07777) {
 334                 log_error("[%s:%u] mode value out of range: %s", filename, line, rvalue);
 335                 return -ERANGE;
 336         }
 337
 338         *m = (mode_t) l;
 339         return 0;
 340 }
 341
 342 static int config_parse_exec(
 343                 const char *filename,
 344                 unsigned line,
 345                 const char *section,
 346                 const char *lvalue,
 347                 const char *rvalue,
 348                 void *data,
 349                 void *userdata) {
 350
 351         ExecCommand **e = data, *nce = NULL;
 352         char **n;
 353         char *w;
 354         unsigned k;
 355         size_t l;
 356         char *state;
 357
 358         assert(filename);
 359         assert(lvalue);
 360         assert(rvalue);
 361         assert(data);
 362
 363         k = 0;
 364         FOREACH_WORD_QUOTED(w, l, rvalue, state)
 365                 k++;
 366
 367         if (!(n = new(char*, k+1)))
 368                 return -ENOMEM;
 369
 370         k = 0;
 371         FOREACH_WORD_QUOTED(w, l, rvalue, state)
 372                 if (!(n[k++] = strndup(w, l)))
 373                         goto fail;
 374
 375         n[k] = NULL;
 376
 377         if (!n[0] || !path_is_absolute(n[0])) {
 378                 log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
 379                 strv_free(n);
 380                 return -EINVAL;
 381         }
 382
 383         if (!(nce = new0(ExecCommand, 1)))
 384                 goto fail;
 385
 386         nce->argv = n;
 387         if (!(nce->path = strdup(n[0])))
 388                 goto fail;
 389
 390         exec_command_append_list(e, nce);
 391
 392         return 0;
 393
 394 fail:
 395         for (; k > 0; k--)
 396                 free(n[k-1]);
 397         free(n);
 398
 399         free(nce);
 400
 401         return -ENOMEM;
 402 }
 403
 404 static int config_parse_usec(
 405                 const char *filename,
 406                 unsigned line,
 407                 const char *section,
 408                 const char *lvalue,
 409                 const char *rvalue,
 410                 void *data,
 411                 void *userdata) {
 412
 413         usec_t *usec = data;
 414         unsigned long long u;
 415         int r;
 416
 417         assert(filename);
 418         assert(lvalue);
 419         assert(rvalue);
 420         assert(data);
 421
 422         if ((r = safe_atollu(rvalue, &u)) < 0) {
 423                 log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
 424                 return r;
 425         }
 426
 427         /* We actually assume the user configures seconds. Later on we
 428          * might choose to support suffixes for time values, to
 429          * configure bigger or smaller units */
 430
 431         *usec = u * USEC_PER_SEC;
 432
 433         return 0;
 434 }
 435
 436 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 437 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 438
 439 static int config_parse_bindtodevice(
 440                 const char *filename,
 441                 unsigned line,
 442                 const char *section,
 443                 const char *lvalue,
 444                 const char *rvalue,
 445                 void *data,
 446                 void *userdata) {
 447
 448         Socket *s = data;
 449         char *n;
 450
 451         assert(filename);
 452         assert(lvalue);
 453         assert(rvalue);
 454         assert(data);
 455
 456         if (rvalue[0] && !streq(rvalue, "*")) {
 457                 if (!(n = strdup(rvalue)))
 458                         return -ENOMEM;
 459         } else
 460                 n = NULL;
 461
 462         free(s->bind_to_device);
 463         s->bind_to_device = n;
 464
 465         return 0;
 466 }
 467
 468 DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 469 DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 470
 471 static int config_parse_facility(
 472                 const char *filename,
 473                 unsigned line,
 474                 const char *section,
 475                 const char *lvalue,
 476                 const char *rvalue,
 477                 void *data,
 478                 void *userdata) {
 479
 480
 481         int *o = data, x;
 482
 483         assert(filename);
 484         assert(lvalue);
 485         assert(rvalue);
 486         assert(data);
 487
 488         if ((x = log_facility_from_string(rvalue)) < 0) {
 489                 log_error("[%s:%u] Failed to parse log facility: %s", filename, line, rvalue);
 490                 return -EBADMSG;
 491         }
 492
 493         *o = LOG_MAKEPRI(x, LOG_PRI(*o));
 494
 495         return 0;
 496 }
 497
 498 static int config_parse_level(
 499                 const char *filename,
 500                 unsigned line,
 501                 const char *section,
 502                 const char *lvalue,
 503                 const char *rvalue,
 504                 void *data,
 505                 void *userdata) {
 506
 507
 508         int *o = data, x;
 509
 510         assert(filename);
 511         assert(lvalue);
 512         assert(rvalue);
 513         assert(data);
 514
 515         if ((x = log_level_from_string(rvalue)) < 0) {
 516                 log_error("[%s:%u] Failed to parse log level: %s", filename, line, rvalue);
 517                 return -EBADMSG;
 518         }
 519
 520         *o = LOG_MAKEPRI(LOG_FAC(*o), x);
 521         return 0;
 522 }
 523
 524 static int config_parse_io_class(
 525                 const char *filename,
 526                 unsigned line,
 527                 const char *section,
 528                 const char *lvalue,
 529                 const char *rvalue,
 530                 void *data,
 531                 void *userdata) {
 532
 533         ExecContext *c = data;
 534         int x;
 535
 536         assert(filename);
 537         assert(lvalue);
 538         assert(rvalue);
 539         assert(data);
 540
 541         if ((x = ioprio_class_from_string(rvalue)) < 0) {
 542                 log_error("[%s:%u] Failed to parse IO scheduling class: %s", filename, line, rvalue);
 543                 return -EBADMSG;
 544         }
 545
 546         c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
 547         c->ioprio_set = true;
 548
 549         return 0;
 550 }
 551
 552 static int config_parse_io_priority(
 553                 const char *filename,
 554                 unsigned line,
 555                 const char *section,
 556                 const char *lvalue,
 557                 const char *rvalue,
 558                 void *data,
 559                 void *userdata) {
 560
 561         ExecContext *c = data;
 562         int i;
 563
 564         assert(filename);
 565         assert(lvalue);
 566         assert(rvalue);
 567         assert(data);
 568
 569         if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
 570                 log_error("[%s:%u] Failed to parse io priority: %s", filename, line, rvalue);
 571                 return -EBADMSG;
 572         }
 573
 574         c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
 575         c->ioprio_set = true;
 576
 577         return 0;
 578 }
 579
 580 static int config_parse_cpu_sched_policy(
 581                 const char *filename,
 582                 unsigned line,
 583                 const char *section,
 584                 const char *lvalue,
 585                 const char *rvalue,
 586                 void *data,
 587                 void *userdata) {
 588
 589
 590         ExecContext *c = data;
 591         int x;
 592
 593         assert(filename);
 594         assert(lvalue);
 595         assert(rvalue);
 596         assert(data);
 597
 598         if ((x = sched_policy_from_string(rvalue)) < 0) {
 599                 log_error("[%s:%u] Failed to parse CPU scheduling policy: %s", filename, line, rvalue);
 600                 return -EBADMSG;
 601         }
 602
 603         c->cpu_sched_policy = x;
 604         c->cpu_sched_set = true;
 605
 606         return 0;
 607 }
 608
 609 static int config_parse_cpu_sched_prio(
 610                 const char *filename,
 611                 unsigned line,
 612                 const char *section,
 613                 const char *lvalue,
 614                 const char *rvalue,
 615                 void *data,
 616                 void *userdata) {
 617
 618         ExecContext *c = data;
 619         int i;
 620
 621         assert(filename);
 622         assert(lvalue);
 623         assert(rvalue);
 624         assert(data);
 625
 626         /* On Linux RR/FIFO have the same range */
 627         if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
 628                 log_error("[%s:%u] Failed to parse CPU scheduling priority: %s", filename, line, rvalue);
 629                 return -EBADMSG;
 630         }
 631
 632         c->cpu_sched_priority = i;
 633         c->cpu_sched_set = true;
 634
 635         return 0;
 636 }
 637
 638 static int config_parse_cpu_affinity(
 639                 const char *filename,
 640                 unsigned line,
 641                 const char *section,
 642                 const char *lvalue,
 643                 const char *rvalue,
 644                 void *data,
 645                 void *userdata) {
 646
 647         ExecContext *c = data;
 648         char *w;
 649         size_t l;
 650         char *state;
 651
 652         assert(filename);
 653         assert(lvalue);
 654         assert(rvalue);
 655         assert(data);
 656
 657         FOREACH_WORD(w, l, rvalue, state) {
 658                 char *t;
 659                 int r;
 660                 unsigned cpu;
 661
 662                 if (!(t = strndup(w, l)))
 663                         return -ENOMEM;
 664
 665                 r = safe_atou(t, &cpu);
 666                 free(t);
 667
 668                 if (r < 0 || cpu >= CPU_SETSIZE) {
 669                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 670                         return -EBADMSG;
 671                 }
 672
 673                 CPU_SET(cpu, &c->cpu_affinity);
 674         }
 675
 676         c->cpu_affinity_set = true;
 677
 678         return 0;
 679 }
 680
 681 static int config_parse_capabilities(
 682                 const char *filename,
 683                 unsigned line,
 684                 const char *section,
 685                 const char *lvalue,
 686                 const char *rvalue,
 687                 void *data,
 688                 void *userdata) {
 689
 690         ExecContext *c = data;
 691         cap_t cap;
 692
 693         assert(filename);
 694         assert(lvalue);
 695         assert(rvalue);
 696         assert(data);
 697
 698         if (!(cap = cap_from_text(rvalue))) {
 699                 if (errno == ENOMEM)
 700                         return -ENOMEM;
 701
 702                 log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
 703                 return -EBADMSG;
 704         }
 705
 706         if (c->capabilities)
 707                 cap_free(c->capabilities);
 708         c->capabilities = cap;
 709
 710         return 0;
 711 }
 712
 713 static int config_parse_secure_bits(
 714                 const char *filename,
 715                 unsigned line,
 716                 const char *section,
 717                 const char *lvalue,
 718                 const char *rvalue,
 719                 void *data,
 720                 void *userdata) {
 721
 722         ExecContext *c = data;
 723         char *w;
 724         size_t l;
 725         char *state;
 726
 727         assert(filename);
 728         assert(lvalue);
 729         assert(rvalue);
 730         assert(data);
 731
 732         FOREACH_WORD(w, l, rvalue, state) {
 733                 if (first_word(w, "keep-caps"))
 734                         c->secure_bits |= SECURE_KEEP_CAPS;
 735                 else if (first_word(w, "keep-caps-locked"))
 736                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 737                 else if (first_word(w, "no-setuid-fixup"))
 738                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 739                 else if (first_word(w, "no-setuid-fixup-locked"))
 740                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 741                 else if (first_word(w, "noroot"))
 742                         c->secure_bits |= SECURE_NOROOT;
 743                 else if (first_word(w, "noroot-locked"))
 744                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 745                 else {
 746                         log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
 747                         return -EBADMSG;
 748                 }
 749         }
 750
 751         return 0;
 752 }
 753
 754 static int config_parse_bounding_set(
 755                 const char *filename,
 756                 unsigned line,
 757                 const char *section,
 758                 const char *lvalue,
 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(w, l, rvalue, state) {
 774                 char *t;
 775                 int r;
 776                 cap_value_t cap;
 777
 778                 if (!(t = strndup(w, l)))
 779                         return -ENOMEM;
 780
 781                 r = cap_from_name(t, &cap);
 782                 free(t);
 783
 784                 if (r < 0) {
 785                         log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
 786                         return -EBADMSG;
 787                 }
 788
 789                 c->capability_bounding_set_drop |= 1 << cap;
 790         }
 791
 792         return 0;
 793 }
 794
 795 static int config_parse_timer_slack_ns(
 796                 const char *filename,
 797                 unsigned line,
 798                 const char *section,
 799                 const char *lvalue,
 800                 const char *rvalue,
 801                 void *data,
 802                 void *userdata) {
 803
 804         ExecContext *c = data;
 805         unsigned long u;
 806         int r;
 807
 808         assert(filename);
 809         assert(lvalue);
 810         assert(rvalue);
 811         assert(data);
 812
 813         if ((r = safe_atolu(rvalue, &u)) < 0) {
 814                 log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
 815                 return r;
 816         }
 817
 818         c->timer_slack_ns = u;
 819
 820         return 0;
 821 }
 822
 823 static int config_parse_limit(
 824                 const char *filename,
 825                 unsigned line,
 826                 const char *section,
 827                 const char *lvalue,
 828                 const char *rvalue,
 829                 void *data,
 830                 void *userdata) {
 831
 832         struct rlimit **rl = data;
 833         unsigned long long u;
 834         int r;
 835
 836         assert(filename);
 837         assert(lvalue);
 838         assert(rvalue);
 839         assert(data);
 840
 841         if ((r = safe_atollu(rvalue, &u)) < 0) {
 842                 log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
 843                 return r;
 844         }
 845
 846         if (!*rl)
 847                 if (!(*rl = new(struct rlimit, 1)))
 848                         return -ENOMEM;
 849
 850         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
 851         return 0;
 852 }
 853
 854 static int config_parse_cgroup(
 855                 const char *filename,
 856                 unsigned line,
 857                 const char *section,
 858                 const char *lvalue,
 859                 const char *rvalue,
 860                 void *data,
 861                 void *userdata) {
 862
 863         Unit *u = userdata;
 864         char *w;
 865         size_t l;
 866         char *state;
 867
 868         FOREACH_WORD(w, l, rvalue, state) {
 869                 char *t;
 870                 int r;
 871
 872                 if (!(t = strndup(w, l)))
 873                         return -ENOMEM;
 874
 875                 r = unit_add_cgroup_from_text(u, t);
 876                 free(t);
 877
 878                 if (r < 0)
 879                         return r;
 880         }
 881
 882         return 0;
 883 }
 884
 885 static int config_parse_sysv_priority(
 886                 const char *filename,
 887                 unsigned line,
 888                 const char *section,
 889                 const char *lvalue,
 890                 const char *rvalue,
 891                 void *data,
 892                 void *userdata) {
 893
 894         int *priority = data;
 895         int r, i;
 896
 897         assert(filename);
 898         assert(lvalue);
 899         assert(rvalue);
 900         assert(data);
 901
 902         if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
 903                 log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
 904                 return r;
 905         }
 906
 907         *priority = (int) i;
 908         return 0;
 909 }
 910
 911 DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 912
 913 static int config_parse_mount_flags(
 914                 const char *filename,
 915                 unsigned line,
 916                 const char *section,
 917                 const char *lvalue,
 918                 const char *rvalue,
 919                 void *data,
 920                 void *userdata) {
 921
 922         ExecContext *c = data;
 923         char *w;
 924         size_t l;
 925         char *state;
 926         unsigned long flags = 0;
 927
 928         assert(filename);
 929         assert(lvalue);
 930         assert(rvalue);
 931         assert(data);
 932
 933         FOREACH_WORD(w, l, rvalue, state) {
 934                 if (strncmp(w, "shared", l) == 0)
 935                         flags |= MS_SHARED;
 936                 else if (strncmp(w, "slave", l) == 0)
 937                         flags |= MS_SLAVE;
 938                 else if (strncmp(w, "private", l) == 0)
 939                         flags |= MS_PRIVATE;
 940                 else {
 941                         log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
 942                         return -EINVAL;
 943                 }
 944         }
 945
 946         c->mount_flags = flags;
 947         return 0;
 948 }
 949
 950 #define FOLLOW_MAX 8
 951
 952 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
 953         unsigned c = 0;
 954         int fd, r;
 955         FILE *f;
 956         char *id = NULL;
 957
 958         assert(filename);
 959         assert(*filename);
 960         assert(_f);
 961         assert(names);
 962
 963         /* This will update the filename pointer if the loaded file is
 964          * reached by a symlink. The old string will be freed. */
 965
 966         for (;;) {
 967                 char *target, *k, *name;
 968
 969                 if (c++ >= FOLLOW_MAX)
 970                         return -ELOOP;
 971
 972                 path_kill_slashes(*filename);
 973
 974                 /* Add the file name we are currently looking at to
 975                  * the names of this unit */
 976                 name = file_name_from_path(*filename);
 977                 if (!(id = set_get(names, name))) {
 978
 979                         if (!(id = strdup(name)))
 980                                 return -ENOMEM;
 981
 982                         if ((r = set_put(names, id)) < 0) {
 983                                 free(id);
 984                                 return r;
 985                         }
 986                 }
 987
 988                 /* Try to open the file name, but don't if its a symlink */
 989                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
 990                         break;
 991
 992                 if (errno != ELOOP)
 993                         return -errno;
 994
 995                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
 996                 if ((r = readlink_malloc(*filename, &target)) < 0)
 997                         return r;
 998
 999                 k = file_in_same_dir(*filename, target);
1000                 free(target);
1001
1002                 if (!k)
1003                         return -ENOMEM;
1004
1005                 free(*filename);
1006                 *filename = k;
1007         }
1008
1009         if (!(f = fdopen(fd, "r"))) {
1010                 r = -errno;
1011                 close_nointr_nofail(fd);
1012                 return r;
1013         }
1014
1015         *_f = f;
1016         *_final = id;
1017         return 0;
1018 }
1019
1020 static int merge_by_names(Unit **u, Set *names, const char *id) {
1021         char *k;
1022         int r;
1023
1024         assert(u);
1025         assert(*u);
1026         assert(names);
1027
1028         /* Let's try to add in all symlink names we found */
1029         while ((k = set_steal_first(names))) {
1030
1031                 /* First try to merge in the other name into our
1032                  * unit */
1033                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1034                         Unit *other;
1035
1036                         /* Hmm, we couldn't merge the other unit into
1037                          * ours? Then let's try it the other way
1038                          * round */
1039
1040                         other = manager_get_unit((*u)->meta.manager, k);
1041                         free(k);
1042
1043                         if (other)
1044                                 if ((r = unit_merge(other, *u)) >= 0) {
1045                                         *u = other;
1046                                         return merge_by_names(u, names, NULL);
1047                                 }
1048
1049                         return r;
1050                 }
1051
1052                 if (id == k)
1053                         unit_choose_id(*u, id);
1054
1055                 free(k);
1056         }
1057
1058         return 0;
1059 }
1060
1061 static void dump_items(FILE *f, const ConfigItem *items) {
1062         const ConfigItem *i;
1063         const char *prev_section = NULL;
1064         bool not_first = false;
1065
1066         struct {
1067                 ConfigParserCallback callback;
1068                 const char *rvalue;
1069         } table[] = {
1070                 { config_parse_int,              "INTEGER" },
1071                 { config_parse_unsigned,         "UNSIGNED" },
1072                 { config_parse_size,             "SIZE" },
1073                 { config_parse_bool,             "BOOLEAN" },
1074                 { config_parse_string,           "STRING" },
1075                 { config_parse_path,             "PATH" },
1076                 { config_parse_strv,             "STRING [...]" },
1077                 { config_parse_nice,             "NICE" },
1078                 { config_parse_oom_adjust,       "OOMADJUST" },
1079                 { config_parse_io_class,         "IOCLASS" },
1080                 { config_parse_io_priority,      "IOPRIORITY" },
1081                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1082                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1083                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1084                 { config_parse_mode,             "MODE" },
1085                 { config_parse_output,           "OUTPUT" },
1086                 { config_parse_input,            "INPUT" },
1087                 { config_parse_facility,         "FACILITY" },
1088                 { config_parse_level,            "LEVEL" },
1089                 { config_parse_capabilities,     "CAPABILITIES" },
1090                 { config_parse_secure_bits,      "SECUREBITS" },
1091                 { config_parse_bounding_set,     "BOUNDINGSET" },
1092                 { config_parse_timer_slack_ns,   "TIMERSLACK" },
1093                 { config_parse_limit,            "LIMIT" },
1094                 { config_parse_cgroup,           "CGROUP [...]" },
1095                 { config_parse_deps,             "UNIT [...]" },
1096                 { config_parse_names,            "UNIT [...]" },
1097                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1098                 { config_parse_service_type,     "SERVICETYPE" },
1099                 { config_parse_service_restart,  "SERVICERESTART" },
1100                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1101                 { config_parse_kill_mode,        "KILLMODE" },
1102                 { config_parse_listen,           "SOCKET [...]" },
1103                 { config_parse_socket_bind,      "SOCKETBIND" },
1104                 { config_parse_bindtodevice,     "NETWORKINTERFACE" }
1105         };
1106
1107         assert(f);
1108         assert(items);
1109
1110         for (i = items; i->lvalue; i++) {
1111                 unsigned j;
1112                 const char *rvalue = "OTHER";
1113
1114                 if (!streq_ptr(i->section, prev_section)) {
1115                         if (!not_first)
1116                                 not_first = true;
1117                         else
1118                                 fputc('\n', f);
1119
1120                         fprintf(f, "[%s]\n", i->section);
1121                         prev_section = i->section;
1122                 }
1123
1124                 for (j = 0; j < ELEMENTSOF(table); j++)
1125                         if (i->parse == table[j].callback) {
1126                                 rvalue = table[j].rvalue;
1127                                 break;
1128                         }
1129
1130                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1131         }
1132 }
1133
1134 static int load_from_path(Unit *u, const char *path) {
1135
1136         static const char* const section_table[_UNIT_TYPE_MAX] = {
1137                 [UNIT_SERVICE]   = "Service",
1138                 [UNIT_TIMER]     = "Timer",
1139                 [UNIT_SOCKET]    = "Socket",
1140                 [UNIT_TARGET]    = "Target",
1141                 [UNIT_DEVICE]    = "Device",
1142                 [UNIT_MOUNT]     = "Mount",
1143                 [UNIT_AUTOMOUNT] = "Automount",
1144                 [UNIT_SNAPSHOT]  = "Snapshot"
1145         };
1146
1147 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1148                 { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
1149                 { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
1150                 { "User",                   config_parse_string,          &(context).user,                                 section   }, \
1151                 { "Group",                  config_parse_string,          &(context).group,                                section   }, \
1152                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
1153                 { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
1154                 { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
1155                 { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
1156                 { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
1157                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
1158                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
1159                 { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
1160                 { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
1161                 { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
1162                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
1163                 { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
1164                 { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
1165                 { "StandardError",          config_parse_output,          &(context).std_output,                           section   }, \
1166                 { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
1167                 { "SyslogIdentifier",       config_parse_string,          &(context).syslog_identifier,                    section   }, \
1168                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
1169                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
1170                 { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
1171                 { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
1172                 { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
1173                 { "TimerSlackNS",           config_parse_timer_slack_ns,  &(context),                                      section   }, \
1174                 { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
1175                 { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1176                 { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
1177                 { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
1178                 { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
1179                 { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
1180                 { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1181                 { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
1182                 { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1183                 { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1184                 { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1185                 { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1186                 { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1187                 { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
1188                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1189                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1190                 { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
1191                 { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
1192                 { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
1193                 { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
1194                 { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
1195                 { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }
1196
1197         const ConfigItem items[] = {
1198                 { "Names",                  config_parse_names,           u,                                               "Unit"    },
1199                 { "Description",            config_parse_string,          &u->meta.description,                            "Unit"    },
1200                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1201                 { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1202                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1203                 { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1204                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1205                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1206                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1207                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1208                 { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
1209                 { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
1210
1211                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
1212                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1213                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1214                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1215                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1216                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1217                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1218                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
1219                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
1220                 { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
1221                 { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
1222                 { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
1223                 { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
1224                 { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
1225                 { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
1226                 { "KillMode",               config_parse_kill_mode,       &u->service.kill_mode,                           "Service" },
1227                 { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
1228                 { "BusName",                config_parse_string,          &u->service.bus_name,                            "Service" },
1229                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1230
1231                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
1232                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
1233                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
1234                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
1235                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
1236                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
1237                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
1238                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
1239                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
1240                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
1241                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
1242                 { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
1243                 { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
1244                 { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
1245                 { "KillMode",               config_parse_kill_mode,       &u->socket.kill_mode,                            "Socket"  },
1246                 { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
1247                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
1248
1249                 { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
1250                 { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
1251                 { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
1252                 { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
1253                 { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
1254                 { "KillMode",               config_parse_kill_mode,       &u->mount.kill_mode,                             "Mount"   },
1255                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
1256
1257                 { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
1258
1259                 { NULL, NULL, NULL, NULL }
1260         };
1261
1262 #undef EXEC_CONTEXT_CONFIG_ITEMS
1263
1264         const char *sections[3];
1265         char *k;
1266         int r;
1267         Set *symlink_names;
1268         FILE *f = NULL;
1269         char *filename = NULL, *id = NULL;
1270         Unit *merged;
1271
1272         if (!u) {
1273                 /* Dirty dirty hack. */
1274                 dump_items((FILE*) path, items);
1275                 return 0;
1276         }
1277
1278         assert(u);
1279         assert(path);
1280
1281         sections[0] = "Unit";
1282         sections[1] = section_table[u->meta.type];
1283         sections[2] = NULL;
1284
1285         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
1286                 return -ENOMEM;
1287
1288         if (path_is_absolute(path)) {
1289
1290                 if (!(filename = strdup(path))) {
1291                         r = -ENOMEM;
1292                         goto finish;
1293                 }
1294
1295                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1296                         free(filename);
1297                         filename = NULL;
1298
1299                         if (r != -ENOENT)
1300                                 goto finish;
1301                 }
1302
1303         } else  {
1304                 char **p;
1305
1306                 STRV_FOREACH(p, u->meta.manager->unit_path) {
1307
1308                         /* Instead of opening the path right away, we manually
1309                          * follow all symlinks and add their name to our unit
1310                          * name set while doing so */
1311                         if (!(filename = path_make_absolute(path, *p))) {
1312                                 r = -ENOMEM;
1313                                 goto finish;
1314                         }
1315
1316                         if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1317                                 char *sn;
1318
1319                                 free(filename);
1320                                 filename = NULL;
1321
1322                                 if (r != -ENOENT)
1323                                         goto finish;
1324
1325                                 /* Empty the symlink names for the next run */
1326                                 while ((sn = set_steal_first(symlink_names)))
1327                                         free(sn);
1328
1329                                 continue;
1330                         }
1331
1332                         break;
1333                 }
1334         }
1335
1336         if (!filename) {
1337                 r = 0;
1338                 goto finish;
1339         }
1340
1341         merged = u;
1342         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
1343                 goto finish;
1344
1345         if (merged != u) {
1346                 u->meta.load_state = UNIT_MERGED;
1347                 r = 0;
1348                 goto finish;
1349         }
1350
1351         /* Now, parse the file contents */
1352         if ((r = config_parse(filename, f, sections, items, u)) < 0)
1353                 goto finish;
1354
1355         free(u->meta.fragment_path);
1356         u->meta.fragment_path = filename;
1357         filename = NULL;
1358
1359         u->meta.load_state = UNIT_LOADED;
1360         r = 0;
1361
1362 finish:
1363         while ((k = set_steal_first(symlink_names)))
1364                 free(k);
1365
1366         set_free(symlink_names);
1367         free(filename);
1368
1369         if (f)
1370                 fclose(f);
1371
1372         return r;
1373 }
1374
1375 int unit_load_fragment(Unit *u) {
1376         int r;
1377
1378         assert(u);
1379
1380         if (u->meta.fragment_path) {
1381
1382                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
1383                         return r;
1384
1385         } else {
1386                 Iterator i;
1387                 const char *t;
1388
1389                 /* Try to find the unit under its id */
1390                 if ((r = load_from_path(u, u->meta.id)) < 0)
1391                         return r;
1392
1393                 /* Try to find an alias we can load this with */
1394                 if (u->meta.load_state == UNIT_STUB)
1395                         SET_FOREACH(t, u->meta.names, i) {
1396
1397                                 if (t == u->meta.id)
1398                                         continue;
1399
1400                                 if ((r = load_from_path(u, t)) < 0)
1401                                         return r;
1402
1403                                 if (u->meta.load_state != UNIT_STUB)
1404                                         break;
1405                         }
1406
1407                 /* Now, follow the same logic, but look for a template */
1408                 if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
1409                         char *k;
1410
1411                         if (!(k = unit_name_template(u->meta.id)))
1412                                 return -ENOMEM;
1413
1414                         r = load_from_path(u, k);
1415                         free(k);
1416
1417                         if (r < 0)
1418                                 return r;
1419
1420                         if (u->meta.load_state == UNIT_STUB)
1421                                 SET_FOREACH(t, u->meta.names, i) {
1422
1423                                         if (t == u->meta.id)
1424                                                 continue;
1425
1426                                         if (!(k = unit_name_template(t)))
1427                                                 return -ENOMEM;
1428
1429                                         r = load_from_path(u, k);
1430                                         free(k);
1431
1432                                         if (r < 0)
1433                                                 return r;
1434
1435                                         if (u->meta.load_state != UNIT_STUB)
1436                                                 break;
1437                                 }
1438                 }
1439         }
1440
1441         return 0;
1442 }
1443
1444 void unit_dump_config_items(FILE *f) {
1445         /* OK, this wins a prize for extreme ugliness. */
1446
1447         load_from_path(NULL, (const void*) f);
1448 }