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         int r;
 415
 416         assert(filename);
 417         assert(lvalue);
 418         assert(rvalue);
 419         assert(data);
 420
 421         if ((r = parse_usec(rvalue, usec)) < 0) {
 422                 log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
 423                 return r;
 424         }
 425
 426         return 0;
 427 }
 428
 429 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 430 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 431
 432 static int config_parse_bindtodevice(
 433                 const char *filename,
 434                 unsigned line,
 435                 const char *section,
 436                 const char *lvalue,
 437                 const char *rvalue,
 438                 void *data,
 439                 void *userdata) {
 440
 441         Socket *s = data;
 442         char *n;
 443
 444         assert(filename);
 445         assert(lvalue);
 446         assert(rvalue);
 447         assert(data);
 448
 449         if (rvalue[0] && !streq(rvalue, "*")) {
 450                 if (!(n = strdup(rvalue)))
 451                         return -ENOMEM;
 452         } else
 453                 n = NULL;
 454
 455         free(s->bind_to_device);
 456         s->bind_to_device = n;
 457
 458         return 0;
 459 }
 460
 461 DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 462 DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 463
 464 static int config_parse_facility(
 465                 const char *filename,
 466                 unsigned line,
 467                 const char *section,
 468                 const char *lvalue,
 469                 const char *rvalue,
 470                 void *data,
 471                 void *userdata) {
 472
 473
 474         int *o = data, x;
 475
 476         assert(filename);
 477         assert(lvalue);
 478         assert(rvalue);
 479         assert(data);
 480
 481         if ((x = log_facility_from_string(rvalue)) < 0) {
 482                 log_error("[%s:%u] Failed to parse log facility: %s", filename, line, rvalue);
 483                 return -EBADMSG;
 484         }
 485
 486         *o = LOG_MAKEPRI(x, LOG_PRI(*o));
 487
 488         return 0;
 489 }
 490
 491 static int config_parse_level(
 492                 const char *filename,
 493                 unsigned line,
 494                 const char *section,
 495                 const char *lvalue,
 496                 const char *rvalue,
 497                 void *data,
 498                 void *userdata) {
 499
 500
 501         int *o = data, x;
 502
 503         assert(filename);
 504         assert(lvalue);
 505         assert(rvalue);
 506         assert(data);
 507
 508         if ((x = log_level_from_string(rvalue)) < 0) {
 509                 log_error("[%s:%u] Failed to parse log level: %s", filename, line, rvalue);
 510                 return -EBADMSG;
 511         }
 512
 513         *o = LOG_MAKEPRI(LOG_FAC(*o), x);
 514         return 0;
 515 }
 516
 517 static int config_parse_io_class(
 518                 const char *filename,
 519                 unsigned line,
 520                 const char *section,
 521                 const char *lvalue,
 522                 const char *rvalue,
 523                 void *data,
 524                 void *userdata) {
 525
 526         ExecContext *c = data;
 527         int x;
 528
 529         assert(filename);
 530         assert(lvalue);
 531         assert(rvalue);
 532         assert(data);
 533
 534         if ((x = ioprio_class_from_string(rvalue)) < 0) {
 535                 log_error("[%s:%u] Failed to parse IO scheduling class: %s", filename, line, rvalue);
 536                 return -EBADMSG;
 537         }
 538
 539         c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
 540         c->ioprio_set = true;
 541
 542         return 0;
 543 }
 544
 545 static int config_parse_io_priority(
 546                 const char *filename,
 547                 unsigned line,
 548                 const char *section,
 549                 const char *lvalue,
 550                 const char *rvalue,
 551                 void *data,
 552                 void *userdata) {
 553
 554         ExecContext *c = data;
 555         int i;
 556
 557         assert(filename);
 558         assert(lvalue);
 559         assert(rvalue);
 560         assert(data);
 561
 562         if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
 563                 log_error("[%s:%u] Failed to parse io priority: %s", filename, line, rvalue);
 564                 return -EBADMSG;
 565         }
 566
 567         c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
 568         c->ioprio_set = true;
 569
 570         return 0;
 571 }
 572
 573 static int config_parse_cpu_sched_policy(
 574                 const char *filename,
 575                 unsigned line,
 576                 const char *section,
 577                 const char *lvalue,
 578                 const char *rvalue,
 579                 void *data,
 580                 void *userdata) {
 581
 582
 583         ExecContext *c = data;
 584         int x;
 585
 586         assert(filename);
 587         assert(lvalue);
 588         assert(rvalue);
 589         assert(data);
 590
 591         if ((x = sched_policy_from_string(rvalue)) < 0) {
 592                 log_error("[%s:%u] Failed to parse CPU scheduling policy: %s", filename, line, rvalue);
 593                 return -EBADMSG;
 594         }
 595
 596         c->cpu_sched_policy = x;
 597         c->cpu_sched_set = true;
 598
 599         return 0;
 600 }
 601
 602 static int config_parse_cpu_sched_prio(
 603                 const char *filename,
 604                 unsigned line,
 605                 const char *section,
 606                 const char *lvalue,
 607                 const char *rvalue,
 608                 void *data,
 609                 void *userdata) {
 610
 611         ExecContext *c = data;
 612         int i;
 613
 614         assert(filename);
 615         assert(lvalue);
 616         assert(rvalue);
 617         assert(data);
 618
 619         /* On Linux RR/FIFO have the same range */
 620         if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
 621                 log_error("[%s:%u] Failed to parse CPU scheduling priority: %s", filename, line, rvalue);
 622                 return -EBADMSG;
 623         }
 624
 625         c->cpu_sched_priority = i;
 626         c->cpu_sched_set = true;
 627
 628         return 0;
 629 }
 630
 631 static int config_parse_cpu_affinity(
 632                 const char *filename,
 633                 unsigned line,
 634                 const char *section,
 635                 const char *lvalue,
 636                 const char *rvalue,
 637                 void *data,
 638                 void *userdata) {
 639
 640         ExecContext *c = data;
 641         char *w;
 642         size_t l;
 643         char *state;
 644
 645         assert(filename);
 646         assert(lvalue);
 647         assert(rvalue);
 648         assert(data);
 649
 650         FOREACH_WORD(w, l, rvalue, state) {
 651                 char *t;
 652                 int r;
 653                 unsigned cpu;
 654
 655                 if (!(t = strndup(w, l)))
 656                         return -ENOMEM;
 657
 658                 r = safe_atou(t, &cpu);
 659                 free(t);
 660
 661                 if (r < 0 || cpu >= CPU_SETSIZE) {
 662                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 663                         return -EBADMSG;
 664                 }
 665
 666                 CPU_SET(cpu, &c->cpu_affinity);
 667         }
 668
 669         c->cpu_affinity_set = true;
 670
 671         return 0;
 672 }
 673
 674 static int config_parse_capabilities(
 675                 const char *filename,
 676                 unsigned line,
 677                 const char *section,
 678                 const char *lvalue,
 679                 const char *rvalue,
 680                 void *data,
 681                 void *userdata) {
 682
 683         ExecContext *c = data;
 684         cap_t cap;
 685
 686         assert(filename);
 687         assert(lvalue);
 688         assert(rvalue);
 689         assert(data);
 690
 691         if (!(cap = cap_from_text(rvalue))) {
 692                 if (errno == ENOMEM)
 693                         return -ENOMEM;
 694
 695                 log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
 696                 return -EBADMSG;
 697         }
 698
 699         if (c->capabilities)
 700                 cap_free(c->capabilities);
 701         c->capabilities = cap;
 702
 703         return 0;
 704 }
 705
 706 static int config_parse_secure_bits(
 707                 const char *filename,
 708                 unsigned line,
 709                 const char *section,
 710                 const char *lvalue,
 711                 const char *rvalue,
 712                 void *data,
 713                 void *userdata) {
 714
 715         ExecContext *c = data;
 716         char *w;
 717         size_t l;
 718         char *state;
 719
 720         assert(filename);
 721         assert(lvalue);
 722         assert(rvalue);
 723         assert(data);
 724
 725         FOREACH_WORD(w, l, rvalue, state) {
 726                 if (first_word(w, "keep-caps"))
 727                         c->secure_bits |= SECURE_KEEP_CAPS;
 728                 else if (first_word(w, "keep-caps-locked"))
 729                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 730                 else if (first_word(w, "no-setuid-fixup"))
 731                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 732                 else if (first_word(w, "no-setuid-fixup-locked"))
 733                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 734                 else if (first_word(w, "noroot"))
 735                         c->secure_bits |= SECURE_NOROOT;
 736                 else if (first_word(w, "noroot-locked"))
 737                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 738                 else {
 739                         log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
 740                         return -EBADMSG;
 741                 }
 742         }
 743
 744         return 0;
 745 }
 746
 747 static int config_parse_bounding_set(
 748                 const char *filename,
 749                 unsigned line,
 750                 const char *section,
 751                 const char *lvalue,
 752                 const char *rvalue,
 753                 void *data,
 754                 void *userdata) {
 755
 756         ExecContext *c = data;
 757         char *w;
 758         size_t l;
 759         char *state;
 760
 761         assert(filename);
 762         assert(lvalue);
 763         assert(rvalue);
 764         assert(data);
 765
 766         FOREACH_WORD(w, l, rvalue, state) {
 767                 char *t;
 768                 int r;
 769                 cap_value_t cap;
 770
 771                 if (!(t = strndup(w, l)))
 772                         return -ENOMEM;
 773
 774                 r = cap_from_name(t, &cap);
 775                 free(t);
 776
 777                 if (r < 0) {
 778                         log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
 779                         return -EBADMSG;
 780                 }
 781
 782                 c->capability_bounding_set_drop |= 1 << cap;
 783         }
 784
 785         return 0;
 786 }
 787
 788 static int config_parse_timer_slack_ns(
 789                 const char *filename,
 790                 unsigned line,
 791                 const char *section,
 792                 const char *lvalue,
 793                 const char *rvalue,
 794                 void *data,
 795                 void *userdata) {
 796
 797         ExecContext *c = data;
 798         unsigned long u;
 799         int r;
 800
 801         assert(filename);
 802         assert(lvalue);
 803         assert(rvalue);
 804         assert(data);
 805
 806         if ((r = safe_atolu(rvalue, &u)) < 0) {
 807                 log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
 808                 return r;
 809         }
 810
 811         c->timer_slack_ns = u;
 812
 813         return 0;
 814 }
 815
 816 static int config_parse_limit(
 817                 const char *filename,
 818                 unsigned line,
 819                 const char *section,
 820                 const char *lvalue,
 821                 const char *rvalue,
 822                 void *data,
 823                 void *userdata) {
 824
 825         struct rlimit **rl = data;
 826         unsigned long long u;
 827         int r;
 828
 829         assert(filename);
 830         assert(lvalue);
 831         assert(rvalue);
 832         assert(data);
 833
 834         if ((r = safe_atollu(rvalue, &u)) < 0) {
 835                 log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
 836                 return r;
 837         }
 838
 839         if (!*rl)
 840                 if (!(*rl = new(struct rlimit, 1)))
 841                         return -ENOMEM;
 842
 843         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
 844         return 0;
 845 }
 846
 847 static int config_parse_cgroup(
 848                 const char *filename,
 849                 unsigned line,
 850                 const char *section,
 851                 const char *lvalue,
 852                 const char *rvalue,
 853                 void *data,
 854                 void *userdata) {
 855
 856         Unit *u = userdata;
 857         char *w;
 858         size_t l;
 859         char *state;
 860
 861         FOREACH_WORD(w, l, rvalue, state) {
 862                 char *t;
 863                 int r;
 864
 865                 if (!(t = strndup(w, l)))
 866                         return -ENOMEM;
 867
 868                 r = unit_add_cgroup_from_text(u, t);
 869                 free(t);
 870
 871                 if (r < 0)
 872                         return r;
 873         }
 874
 875         return 0;
 876 }
 877
 878 static int config_parse_sysv_priority(
 879                 const char *filename,
 880                 unsigned line,
 881                 const char *section,
 882                 const char *lvalue,
 883                 const char *rvalue,
 884                 void *data,
 885                 void *userdata) {
 886
 887         int *priority = data;
 888         int r, i;
 889
 890         assert(filename);
 891         assert(lvalue);
 892         assert(rvalue);
 893         assert(data);
 894
 895         if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
 896                 log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
 897                 return r;
 898         }
 899
 900         *priority = (int) i;
 901         return 0;
 902 }
 903
 904 DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 905
 906 static int config_parse_mount_flags(
 907                 const char *filename,
 908                 unsigned line,
 909                 const char *section,
 910                 const char *lvalue,
 911                 const char *rvalue,
 912                 void *data,
 913                 void *userdata) {
 914
 915         ExecContext *c = data;
 916         char *w;
 917         size_t l;
 918         char *state;
 919         unsigned long flags = 0;
 920
 921         assert(filename);
 922         assert(lvalue);
 923         assert(rvalue);
 924         assert(data);
 925
 926         FOREACH_WORD(w, l, rvalue, state) {
 927                 if (strncmp(w, "shared", l) == 0)
 928                         flags |= MS_SHARED;
 929                 else if (strncmp(w, "slave", l) == 0)
 930                         flags |= MS_SLAVE;
 931                 else if (strncmp(w, "private", l) == 0)
 932                         flags |= MS_PRIVATE;
 933                 else {
 934                         log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
 935                         return -EINVAL;
 936                 }
 937         }
 938
 939         c->mount_flags = flags;
 940         return 0;
 941 }
 942
 943 #define FOLLOW_MAX 8
 944
 945 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
 946         unsigned c = 0;
 947         int fd, r;
 948         FILE *f;
 949         char *id = NULL;
 950
 951         assert(filename);
 952         assert(*filename);
 953         assert(_f);
 954         assert(names);
 955
 956         /* This will update the filename pointer if the loaded file is
 957          * reached by a symlink. The old string will be freed. */
 958
 959         for (;;) {
 960                 char *target, *k, *name;
 961
 962                 if (c++ >= FOLLOW_MAX)
 963                         return -ELOOP;
 964
 965                 path_kill_slashes(*filename);
 966
 967                 /* Add the file name we are currently looking at to
 968                  * the names of this unit */
 969                 name = file_name_from_path(*filename);
 970                 if (!(id = set_get(names, name))) {
 971
 972                         if (!(id = strdup(name)))
 973                                 return -ENOMEM;
 974
 975                         if ((r = set_put(names, id)) < 0) {
 976                                 free(id);
 977                                 return r;
 978                         }
 979                 }
 980
 981                 /* Try to open the file name, but don't if its a symlink */
 982                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
 983                         break;
 984
 985                 if (errno != ELOOP)
 986                         return -errno;
 987
 988                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
 989                 if ((r = readlink_malloc(*filename, &target)) < 0)
 990                         return r;
 991
 992                 k = file_in_same_dir(*filename, target);
 993                 free(target);
 994
 995                 if (!k)
 996                         return -ENOMEM;
 997
 998                 free(*filename);
 999                 *filename = k;
1000         }
1001
1002         if (!(f = fdopen(fd, "r"))) {
1003                 r = -errno;
1004                 close_nointr_nofail(fd);
1005                 return r;
1006         }
1007
1008         *_f = f;
1009         *_final = id;
1010         return 0;
1011 }
1012
1013 static int merge_by_names(Unit **u, Set *names, const char *id) {
1014         char *k;
1015         int r;
1016
1017         assert(u);
1018         assert(*u);
1019         assert(names);
1020
1021         /* Let's try to add in all symlink names we found */
1022         while ((k = set_steal_first(names))) {
1023
1024                 /* First try to merge in the other name into our
1025                  * unit */
1026                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1027                         Unit *other;
1028
1029                         /* Hmm, we couldn't merge the other unit into
1030                          * ours? Then let's try it the other way
1031                          * round */
1032
1033                         other = manager_get_unit((*u)->meta.manager, k);
1034                         free(k);
1035
1036                         if (other)
1037                                 if ((r = unit_merge(other, *u)) >= 0) {
1038                                         *u = other;
1039                                         return merge_by_names(u, names, NULL);
1040                                 }
1041
1042                         return r;
1043                 }
1044
1045                 if (id == k)
1046                         unit_choose_id(*u, id);
1047
1048                 free(k);
1049         }
1050
1051         return 0;
1052 }
1053
1054 static void dump_items(FILE *f, const ConfigItem *items) {
1055         const ConfigItem *i;
1056         const char *prev_section = NULL;
1057         bool not_first = false;
1058
1059         struct {
1060                 ConfigParserCallback callback;
1061                 const char *rvalue;
1062         } table[] = {
1063                 { config_parse_int,              "INTEGER" },
1064                 { config_parse_unsigned,         "UNSIGNED" },
1065                 { config_parse_size,             "SIZE" },
1066                 { config_parse_bool,             "BOOLEAN" },
1067                 { config_parse_string,           "STRING" },
1068                 { config_parse_path,             "PATH" },
1069                 { config_parse_strv,             "STRING [...]" },
1070                 { config_parse_nice,             "NICE" },
1071                 { config_parse_oom_adjust,       "OOMADJUST" },
1072                 { config_parse_io_class,         "IOCLASS" },
1073                 { config_parse_io_priority,      "IOPRIORITY" },
1074                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1075                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1076                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1077                 { config_parse_mode,             "MODE" },
1078                 { config_parse_output,           "OUTPUT" },
1079                 { config_parse_input,            "INPUT" },
1080                 { config_parse_facility,         "FACILITY" },
1081                 { config_parse_level,            "LEVEL" },
1082                 { config_parse_capabilities,     "CAPABILITIES" },
1083                 { config_parse_secure_bits,      "SECUREBITS" },
1084                 { config_parse_bounding_set,     "BOUNDINGSET" },
1085                 { config_parse_timer_slack_ns,   "TIMERSLACK" },
1086                 { config_parse_limit,            "LIMIT" },
1087                 { config_parse_cgroup,           "CGROUP [...]" },
1088                 { config_parse_deps,             "UNIT [...]" },
1089                 { config_parse_names,            "UNIT [...]" },
1090                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1091                 { config_parse_service_type,     "SERVICETYPE" },
1092                 { config_parse_service_restart,  "SERVICERESTART" },
1093                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1094                 { config_parse_kill_mode,        "KILLMODE" },
1095                 { config_parse_listen,           "SOCKET [...]" },
1096                 { config_parse_socket_bind,      "SOCKETBIND" },
1097                 { config_parse_bindtodevice,     "NETWORKINTERFACE" },
1098                 { config_parse_usec,             "SECONDS" },
1099                 { config_parse_path_strv,        "PATH [...]" },
1100                 { config_parse_mount_flags,      "MOUNTFLAG [...]" }
1101         };
1102
1103         assert(f);
1104         assert(items);
1105
1106         for (i = items; i->lvalue; i++) {
1107                 unsigned j;
1108                 const char *rvalue = "OTHER";
1109
1110                 if (!streq_ptr(i->section, prev_section)) {
1111                         if (!not_first)
1112                                 not_first = true;
1113                         else
1114                                 fputc('\n', f);
1115
1116                         fprintf(f, "[%s]\n", i->section);
1117                         prev_section = i->section;
1118                 }
1119
1120                 for (j = 0; j < ELEMENTSOF(table); j++)
1121                         if (i->parse == table[j].callback) {
1122                                 rvalue = table[j].rvalue;
1123                                 break;
1124                         }
1125
1126                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1127         }
1128 }
1129
1130 static int load_from_path(Unit *u, const char *path) {
1131
1132         static const char* const section_table[_UNIT_TYPE_MAX] = {
1133                 [UNIT_SERVICE]   = "Service",
1134                 [UNIT_TIMER]     = "Timer",
1135                 [UNIT_SOCKET]    = "Socket",
1136                 [UNIT_TARGET]    = "Target",
1137                 [UNIT_DEVICE]    = "Device",
1138                 [UNIT_MOUNT]     = "Mount",
1139                 [UNIT_AUTOMOUNT] = "Automount",
1140                 [UNIT_SNAPSHOT]  = "Snapshot"
1141         };
1142
1143 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1144                 { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
1145                 { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
1146                 { "User",                   config_parse_string,          &(context).user,                                 section   }, \
1147                 { "Group",                  config_parse_string,          &(context).group,                                section   }, \
1148                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
1149                 { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
1150                 { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
1151                 { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
1152                 { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
1153                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
1154                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
1155                 { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
1156                 { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
1157                 { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
1158                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
1159                 { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
1160                 { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
1161                 { "StandardError",          config_parse_output,          &(context).std_output,                           section   }, \
1162                 { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
1163                 { "SyslogIdentifier",       config_parse_string,          &(context).syslog_identifier,                    section   }, \
1164                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
1165                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
1166                 { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
1167                 { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
1168                 { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
1169                 { "TimerSlackNS",           config_parse_timer_slack_ns,  &(context),                                      section   }, \
1170                 { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
1171                 { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1172                 { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
1173                 { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
1174                 { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
1175                 { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
1176                 { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1177                 { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
1178                 { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1179                 { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1180                 { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1181                 { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1182                 { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1183                 { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
1184                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1185                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1186                 { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
1187                 { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
1188                 { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
1189                 { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
1190                 { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
1191                 { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }
1192
1193         const ConfigItem items[] = {
1194                 { "Names",                  config_parse_names,           u,                                               "Unit"    },
1195                 { "Description",            config_parse_string,          &u->meta.description,                            "Unit"    },
1196                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1197                 { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1198                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1199                 { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1200                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1201                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1202                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1203                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1204                 { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
1205                 { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
1206
1207                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
1208                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1209                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1210                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1211                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1212                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1213                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1214                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
1215                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
1216                 { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
1217                 { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
1218                 { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
1219                 { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
1220                 { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
1221                 { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
1222                 { "KillMode",               config_parse_kill_mode,       &u->service.kill_mode,                           "Service" },
1223                 { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
1224                 { "BusName",                config_parse_string,          &u->service.bus_name,                            "Service" },
1225                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1226
1227                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
1228                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
1229                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
1230                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
1231                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
1232                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
1233                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
1234                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
1235                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
1236                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
1237                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
1238                 { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
1239                 { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
1240                 { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
1241                 { "KillMode",               config_parse_kill_mode,       &u->socket.kill_mode,                            "Socket"  },
1242                 { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
1243                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
1244
1245                 { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
1246                 { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
1247                 { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
1248                 { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
1249                 { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
1250                 { "KillMode",               config_parse_kill_mode,       &u->mount.kill_mode,                             "Mount"   },
1251                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
1252
1253                 { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
1254
1255                 { NULL, NULL, NULL, NULL }
1256         };
1257
1258 #undef EXEC_CONTEXT_CONFIG_ITEMS
1259
1260         const char *sections[3];
1261         char *k;
1262         int r;
1263         Set *symlink_names;
1264         FILE *f = NULL;
1265         char *filename = NULL, *id = NULL;
1266         Unit *merged;
1267
1268         if (!u) {
1269                 /* Dirty dirty hack. */
1270                 dump_items((FILE*) path, items);
1271                 return 0;
1272         }
1273
1274         assert(u);
1275         assert(path);
1276
1277         sections[0] = "Unit";
1278         sections[1] = section_table[u->meta.type];
1279         sections[2] = NULL;
1280
1281         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
1282                 return -ENOMEM;
1283
1284         if (path_is_absolute(path)) {
1285
1286                 if (!(filename = strdup(path))) {
1287                         r = -ENOMEM;
1288                         goto finish;
1289                 }
1290
1291                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1292                         free(filename);
1293                         filename = NULL;
1294
1295                         if (r != -ENOENT)
1296                                 goto finish;
1297                 }
1298
1299         } else  {
1300                 char **p;
1301
1302                 STRV_FOREACH(p, u->meta.manager->unit_path) {
1303
1304                         /* Instead of opening the path right away, we manually
1305                          * follow all symlinks and add their name to our unit
1306                          * name set while doing so */
1307                         if (!(filename = path_make_absolute(path, *p))) {
1308                                 r = -ENOMEM;
1309                                 goto finish;
1310                         }
1311
1312                         if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1313                                 char *sn;
1314
1315                                 free(filename);
1316                                 filename = NULL;
1317
1318                                 if (r != -ENOENT)
1319                                         goto finish;
1320
1321                                 /* Empty the symlink names for the next run */
1322                                 while ((sn = set_steal_first(symlink_names)))
1323                                         free(sn);
1324
1325                                 continue;
1326                         }
1327
1328                         break;
1329                 }
1330         }
1331
1332         if (!filename) {
1333                 r = 0;
1334                 goto finish;
1335         }
1336
1337         merged = u;
1338         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
1339                 goto finish;
1340
1341         if (merged != u) {
1342                 u->meta.load_state = UNIT_MERGED;
1343                 r = 0;
1344                 goto finish;
1345         }
1346
1347         /* Now, parse the file contents */
1348         if ((r = config_parse(filename, f, sections, items, u)) < 0)
1349                 goto finish;
1350
1351         free(u->meta.fragment_path);
1352         u->meta.fragment_path = filename;
1353         filename = NULL;
1354
1355         u->meta.load_state = UNIT_LOADED;
1356         r = 0;
1357
1358 finish:
1359         while ((k = set_steal_first(symlink_names)))
1360                 free(k);
1361
1362         set_free(symlink_names);
1363         free(filename);
1364
1365         if (f)
1366                 fclose(f);
1367
1368         return r;
1369 }
1370
1371 int unit_load_fragment(Unit *u) {
1372         int r;
1373
1374         assert(u);
1375
1376         if (u->meta.fragment_path) {
1377
1378                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
1379                         return r;
1380
1381         } else {
1382                 Iterator i;
1383                 const char *t;
1384
1385                 /* Try to find the unit under its id */
1386                 if ((r = load_from_path(u, u->meta.id)) < 0)
1387                         return r;
1388
1389                 /* Try to find an alias we can load this with */
1390                 if (u->meta.load_state == UNIT_STUB)
1391                         SET_FOREACH(t, u->meta.names, i) {
1392
1393                                 if (t == u->meta.id)
1394                                         continue;
1395
1396                                 if ((r = load_from_path(u, t)) < 0)
1397                                         return r;
1398
1399                                 if (u->meta.load_state != UNIT_STUB)
1400                                         break;
1401                         }
1402
1403                 /* Now, follow the same logic, but look for a template */
1404                 if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
1405                         char *k;
1406
1407                         if (!(k = unit_name_template(u->meta.id)))
1408                                 return -ENOMEM;
1409
1410                         r = load_from_path(u, k);
1411                         free(k);
1412
1413                         if (r < 0)
1414                                 return r;
1415
1416                         if (u->meta.load_state == UNIT_STUB)
1417                                 SET_FOREACH(t, u->meta.names, i) {
1418
1419                                         if (t == u->meta.id)
1420                                                 continue;
1421
1422                                         if (!(k = unit_name_template(t)))
1423                                                 return -ENOMEM;
1424
1425                                         r = load_from_path(u, k);
1426                                         free(k);
1427
1428                                         if (r < 0)
1429                                                 return r;
1430
1431                                         if (u->meta.load_state != UNIT_STUB)
1432                                                 break;
1433                                 }
1434                 }
1435         }
1436
1437         return 0;
1438 }
1439
1440 void unit_dump_config_items(FILE *f) {
1441         /* OK, this wins a prize for extreme ugliness. */
1442
1443         load_from_path(NULL, (const void*) f);
1444 }