src/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 #include <linux/fs.h>
  32
  33 #include "unit.h"
  34 #include "strv.h"
  35 #include "conf-parser.h"
  36 #include "load-fragment.h"
  37 #include "log.h"
  38 #include "ioprio.h"
  39 #include "securebits.h"
  40 #include "missing.h"
  41 #include "unit-name.h"
  42
  43 #define COMMENTS "#;\n"
  44 #define LINE_MAX 4096
  45
  46 #define DEFINE_CONFIG_PARSE_ENUM(function,name,type,msg)                \
  47         static int function(                                            \
  48                         const char *filename,                           \
  49                         unsigned line,                                  \
  50                         const char *section,                            \
  51                         const char *lvalue,                             \
  52                         const char *rvalue,                             \
  53                         void *data,                                     \
  54                         void *userdata) {                               \
  55                                                                         \
  56                 type *i = data, x;                                      \
  57                                                                         \
  58                 assert(filename);                                       \
  59                 assert(lvalue);                                         \
  60                 assert(rvalue);                                         \
  61                 assert(data);                                           \
  62                                                                         \
  63                 if ((x = name##_from_string(rvalue)) < 0) {             \
  64                         log_error("[%s:%u] " msg ": %s", filename, line, rvalue); \
  65                         return -EBADMSG;                                \
  66                 }                                                       \
  67                                                                         \
  68                 *i = x;                                                 \
  69                                                                         \
  70                 return 0;                                               \
  71         }
  72
  73 static int config_parse_deps(
  74                 const char *filename,
  75                 unsigned line,
  76                 const char *section,
  77                 const char *lvalue,
  78                 const char *rvalue,
  79                 void *data,
  80                 void *userdata) {
  81
  82         UnitDependency d = PTR_TO_UINT(data);
  83         Unit *u = userdata;
  84         char *w;
  85         size_t l;
  86         char *state;
  87
  88         assert(filename);
  89         assert(lvalue);
  90         assert(rvalue);
  91
  92         FOREACH_WORD(w, l, rvalue, state) {
  93                 char *t, *k;
  94                 int r;
  95
  96                 if (!(t = strndup(w, l)))
  97                         return -ENOMEM;
  98
  99                 k = unit_name_printf(u, t);
 100                 free(t);
 101
 102                 if (!k)
 103                         return -ENOMEM;
 104
 105                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
 106                 free(k);
 107
 108                 if (r < 0)
 109                         return r;
 110         }
 111
 112         return 0;
 113 }
 114
 115 static int config_parse_names(
 116                 const char *filename,
 117                 unsigned line,
 118                 const char *section,
 119                 const char *lvalue,
 120                 const char *rvalue,
 121                 void *data,
 122                 void *userdata) {
 123
 124         Unit *u = userdata;
 125         char *w;
 126         size_t l;
 127         char *state;
 128
 129         assert(filename);
 130         assert(lvalue);
 131         assert(rvalue);
 132         assert(data);
 133
 134         FOREACH_WORD(w, l, rvalue, state) {
 135                 char *t, *k;
 136                 int r;
 137
 138                 if (!(t = strndup(w, l)))
 139                         return -ENOMEM;
 140
 141                 k = unit_name_printf(u, t);
 142                 free(t);
 143
 144                 if (!k)
 145                         return -ENOMEM;
 146
 147                 r = unit_merge_by_name(u, k);
 148                 free(k);
 149
 150                 if (r < 0)
 151                         return r;
 152         }
 153
 154         return 0;
 155 }
 156
 157 static int config_parse_description(
 158                 const char *filename,
 159                 unsigned line,
 160                 const char *section,
 161                 const char *lvalue,
 162                 const char *rvalue,
 163                 void *data,
 164                 void *userdata) {
 165
 166         Unit *u = userdata;
 167         char *k;
 168
 169         assert(filename);
 170         assert(lvalue);
 171         assert(rvalue);
 172         assert(data);
 173
 174         if (!(k = unit_full_printf(u, rvalue)))
 175                 return -ENOMEM;
 176
 177         free(u->meta.description);
 178
 179         if (*k)
 180                 u->meta.description = k;
 181         else {
 182                 free(k);
 183                 u->meta.description = NULL;
 184         }
 185
 186         return 0;
 187 }
 188
 189 static int config_parse_listen(
 190                 const char *filename,
 191                 unsigned line,
 192                 const char *section,
 193                 const char *lvalue,
 194                 const char *rvalue,
 195                 void *data,
 196                 void *userdata) {
 197
 198         int r;
 199         SocketPort *p;
 200         Socket *s;
 201
 202         assert(filename);
 203         assert(lvalue);
 204         assert(rvalue);
 205         assert(data);
 206
 207         s = (Socket*) data;
 208
 209         if (!(p = new0(SocketPort, 1)))
 210                 return -ENOMEM;
 211
 212         if (streq(lvalue, "ListenFIFO")) {
 213                 p->type = SOCKET_FIFO;
 214
 215                 if (!(p->path = strdup(rvalue))) {
 216                         free(p);
 217                         return -ENOMEM;
 218                 }
 219
 220                 path_kill_slashes(p->path);
 221         } else {
 222                 p->type = SOCKET_SOCKET;
 223
 224                 if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
 225                         log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
 226                         free(p);
 227                         return r;
 228                 }
 229
 230                 if (streq(lvalue, "ListenStream"))
 231                         p->address.type = SOCK_STREAM;
 232                 else if (streq(lvalue, "ListenDatagram"))
 233                         p->address.type = SOCK_DGRAM;
 234                 else {
 235                         assert(streq(lvalue, "ListenSequentialPacket"));
 236                         p->address.type = SOCK_SEQPACKET;
 237                 }
 238
 239                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
 240                         free(p);
 241                         return -EPROTONOSUPPORT;
 242                 }
 243         }
 244
 245         p->fd = -1;
 246         LIST_PREPEND(SocketPort, port, s->ports, p);
 247
 248         return 0;
 249 }
 250
 251 static int config_parse_socket_bind(
 252                 const char *filename,
 253                 unsigned line,
 254                 const char *section,
 255                 const char *lvalue,
 256                 const char *rvalue,
 257                 void *data,
 258                 void *userdata) {
 259
 260         Socket *s;
 261         SocketAddressBindIPv6Only b;
 262
 263         assert(filename);
 264         assert(lvalue);
 265         assert(rvalue);
 266         assert(data);
 267
 268         s = (Socket*) data;
 269
 270         if ((b = socket_address_bind_ipv6_only_from_string(rvalue)) < 0) {
 271                 int r;
 272
 273                 if ((r = parse_boolean(rvalue)) < 0) {
 274                         log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
 275                         return -EBADMSG;
 276                 }
 277
 278                 s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
 279         } else
 280                 s->bind_ipv6_only = b;
 281
 282         return 0;
 283 }
 284
 285 static int config_parse_nice(
 286                 const char *filename,
 287                 unsigned line,
 288                 const char *section,
 289                 const char *lvalue,
 290                 const char *rvalue,
 291                 void *data,
 292                 void *userdata) {
 293
 294         ExecContext *c = data;
 295         int priority, r;
 296
 297         assert(filename);
 298         assert(lvalue);
 299         assert(rvalue);
 300         assert(data);
 301
 302         if ((r = safe_atoi(rvalue, &priority)) < 0) {
 303                 log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
 304                 return r;
 305         }
 306
 307         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
 308                 log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
 309                 return -ERANGE;
 310         }
 311
 312         c->nice = priority;
 313         c->nice_set = false;
 314
 315         return 0;
 316 }
 317
 318 static int config_parse_oom_adjust(
 319                 const char *filename,
 320                 unsigned line,
 321                 const char *section,
 322                 const char *lvalue,
 323                 const char *rvalue,
 324                 void *data,
 325                 void *userdata) {
 326
 327         ExecContext *c = data;
 328         int oa, r;
 329
 330         assert(filename);
 331         assert(lvalue);
 332         assert(rvalue);
 333         assert(data);
 334
 335         if ((r = safe_atoi(rvalue, &oa)) < 0) {
 336                 log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
 337                 return r;
 338         }
 339
 340         if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
 341                 log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
 342                 return -ERANGE;
 343         }
 344
 345         c->oom_adjust = oa;
 346         c->oom_adjust_set = true;
 347
 348         return 0;
 349 }
 350
 351 static int config_parse_mode(
 352                 const char *filename,
 353                 unsigned line,
 354                 const char *section,
 355                 const char *lvalue,
 356                 const char *rvalue,
 357                 void *data,
 358                 void *userdata) {
 359
 360         mode_t *m = data;
 361         long l;
 362         char *x = NULL;
 363
 364         assert(filename);
 365         assert(lvalue);
 366         assert(rvalue);
 367         assert(data);
 368
 369         errno = 0;
 370         l = strtol(rvalue, &x, 8);
 371         if (!x || *x || errno) {
 372                 log_error("[%s:%u] Failed to parse mode value: %s", filename, line, rvalue);
 373                 return errno ? -errno : -EINVAL;
 374         }
 375
 376         if (l < 0000 || l > 07777) {
 377                 log_error("[%s:%u] mode value out of range: %s", filename, line, rvalue);
 378                 return -ERANGE;
 379         }
 380
 381         *m = (mode_t) l;
 382         return 0;
 383 }
 384
 385 static int config_parse_exec(
 386                 const char *filename,
 387                 unsigned line,
 388                 const char *section,
 389                 const char *lvalue,
 390                 const char *rvalue,
 391                 void *data,
 392                 void *userdata) {
 393
 394         ExecCommand **e = data, *nce = NULL;
 395         char **n;
 396         char *w;
 397         unsigned k;
 398         size_t l;
 399         char *state, *path = NULL;
 400         bool honour_argv0, write_to_path;
 401
 402         assert(filename);
 403         assert(lvalue);
 404         assert(rvalue);
 405         assert(data);
 406
 407         /* We accept an absolute path as first argument, or
 408          * alternatively an absolute prefixed with @ to allow
 409          * overriding of argv[0]. */
 410
 411         honour_argv0 = rvalue[0] == '@';
 412
 413         if (rvalue[honour_argv0 ? 1 : 0] != '/') {
 414                 log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
 415                 return -EINVAL;
 416         }
 417
 418         k = 0;
 419         FOREACH_WORD_QUOTED(w, l, rvalue, state)
 420                 k++;
 421
 422         if (!(n = new(char*, k + (honour_argv0 ? 0 : 1))))
 423                 return -ENOMEM;
 424
 425         k = 0;
 426         write_to_path = honour_argv0;
 427         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 428                 if (write_to_path) {
 429                         if (!(path = strndup(w+1, l-1)))
 430                                 goto fail;
 431                         write_to_path = false;
 432                 } else {
 433                         if (!(n[k++] = strndup(w, l)))
 434                                 goto fail;
 435                 }
 436         }
 437
 438         n[k] = NULL;
 439
 440         if (!n[0]) {
 441                 log_error("[%s:%u] Invalid command line: %s", filename, line, rvalue);
 442                 strv_free(n);
 443                 return -EINVAL;
 444         }
 445
 446         if (!path)
 447                 if (!(path = strdup(n[0])))
 448                         goto fail;
 449
 450         assert(path_is_absolute(path));
 451
 452         if (!(nce = new0(ExecCommand, 1)))
 453                 goto fail;
 454
 455         nce->argv = n;
 456         nce->path = path;
 457
 458         path_kill_slashes(nce->path);
 459
 460         exec_command_append_list(e, nce);
 461
 462         return 0;
 463
 464 fail:
 465         n[k] = NULL;
 466         strv_free(n);
 467         free(path);
 468         free(nce);
 469
 470         return -ENOMEM;
 471 }
 472
 473 static int config_parse_usec(
 474                 const char *filename,
 475                 unsigned line,
 476                 const char *section,
 477                 const char *lvalue,
 478                 const char *rvalue,
 479                 void *data,
 480                 void *userdata) {
 481
 482         usec_t *usec = data;
 483         int r;
 484
 485         assert(filename);
 486         assert(lvalue);
 487         assert(rvalue);
 488         assert(data);
 489
 490         if ((r = parse_usec(rvalue, usec)) < 0) {
 491                 log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
 492                 return r;
 493         }
 494
 495         return 0;
 496 }
 497
 498 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 499 DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 500
 501 static int config_parse_bindtodevice(
 502                 const char *filename,
 503                 unsigned line,
 504                 const char *section,
 505                 const char *lvalue,
 506                 const char *rvalue,
 507                 void *data,
 508                 void *userdata) {
 509
 510         Socket *s = data;
 511         char *n;
 512
 513         assert(filename);
 514         assert(lvalue);
 515         assert(rvalue);
 516         assert(data);
 517
 518         if (rvalue[0] && !streq(rvalue, "*")) {
 519                 if (!(n = strdup(rvalue)))
 520                         return -ENOMEM;
 521         } else
 522                 n = NULL;
 523
 524         free(s->bind_to_device);
 525         s->bind_to_device = n;
 526
 527         return 0;
 528 }
 529
 530 DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 531 DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 532
 533 static int config_parse_facility(
 534                 const char *filename,
 535                 unsigned line,
 536                 const char *section,
 537                 const char *lvalue,
 538                 const char *rvalue,
 539                 void *data,
 540                 void *userdata) {
 541
 542
 543         int *o = data, x;
 544
 545         assert(filename);
 546         assert(lvalue);
 547         assert(rvalue);
 548         assert(data);
 549
 550         if ((x = log_facility_from_string(rvalue)) < 0) {
 551                 log_error("[%s:%u] Failed to parse log facility: %s", filename, line, rvalue);
 552                 return -EBADMSG;
 553         }
 554
 555         *o = LOG_MAKEPRI(x, LOG_PRI(*o));
 556
 557         return 0;
 558 }
 559
 560 static int config_parse_level(
 561                 const char *filename,
 562                 unsigned line,
 563                 const char *section,
 564                 const char *lvalue,
 565                 const char *rvalue,
 566                 void *data,
 567                 void *userdata) {
 568
 569
 570         int *o = data, x;
 571
 572         assert(filename);
 573         assert(lvalue);
 574         assert(rvalue);
 575         assert(data);
 576
 577         if ((x = log_level_from_string(rvalue)) < 0) {
 578                 log_error("[%s:%u] Failed to parse log level: %s", filename, line, rvalue);
 579                 return -EBADMSG;
 580         }
 581
 582         *o = LOG_MAKEPRI(LOG_FAC(*o), x);
 583         return 0;
 584 }
 585
 586 static int config_parse_io_class(
 587                 const char *filename,
 588                 unsigned line,
 589                 const char *section,
 590                 const char *lvalue,
 591                 const char *rvalue,
 592                 void *data,
 593                 void *userdata) {
 594
 595         ExecContext *c = data;
 596         int x;
 597
 598         assert(filename);
 599         assert(lvalue);
 600         assert(rvalue);
 601         assert(data);
 602
 603         if ((x = ioprio_class_from_string(rvalue)) < 0) {
 604                 log_error("[%s:%u] Failed to parse IO scheduling class: %s", filename, line, rvalue);
 605                 return -EBADMSG;
 606         }
 607
 608         c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
 609         c->ioprio_set = true;
 610
 611         return 0;
 612 }
 613
 614 static int config_parse_io_priority(
 615                 const char *filename,
 616                 unsigned line,
 617                 const char *section,
 618                 const char *lvalue,
 619                 const char *rvalue,
 620                 void *data,
 621                 void *userdata) {
 622
 623         ExecContext *c = data;
 624         int i;
 625
 626         assert(filename);
 627         assert(lvalue);
 628         assert(rvalue);
 629         assert(data);
 630
 631         if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
 632                 log_error("[%s:%u] Failed to parse io priority: %s", filename, line, rvalue);
 633                 return -EBADMSG;
 634         }
 635
 636         c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
 637         c->ioprio_set = true;
 638
 639         return 0;
 640 }
 641
 642 static int config_parse_cpu_sched_policy(
 643                 const char *filename,
 644                 unsigned line,
 645                 const char *section,
 646                 const char *lvalue,
 647                 const char *rvalue,
 648                 void *data,
 649                 void *userdata) {
 650
 651
 652         ExecContext *c = data;
 653         int x;
 654
 655         assert(filename);
 656         assert(lvalue);
 657         assert(rvalue);
 658         assert(data);
 659
 660         if ((x = sched_policy_from_string(rvalue)) < 0) {
 661                 log_error("[%s:%u] Failed to parse CPU scheduling policy: %s", filename, line, rvalue);
 662                 return -EBADMSG;
 663         }
 664
 665         c->cpu_sched_policy = x;
 666         c->cpu_sched_set = true;
 667
 668         return 0;
 669 }
 670
 671 static int config_parse_cpu_sched_prio(
 672                 const char *filename,
 673                 unsigned line,
 674                 const char *section,
 675                 const char *lvalue,
 676                 const char *rvalue,
 677                 void *data,
 678                 void *userdata) {
 679
 680         ExecContext *c = data;
 681         int i;
 682
 683         assert(filename);
 684         assert(lvalue);
 685         assert(rvalue);
 686         assert(data);
 687
 688         /* On Linux RR/FIFO have the same range */
 689         if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
 690                 log_error("[%s:%u] Failed to parse CPU scheduling priority: %s", filename, line, rvalue);
 691                 return -EBADMSG;
 692         }
 693
 694         c->cpu_sched_priority = i;
 695         c->cpu_sched_set = true;
 696
 697         return 0;
 698 }
 699
 700 static int config_parse_cpu_affinity(
 701                 const char *filename,
 702                 unsigned line,
 703                 const char *section,
 704                 const char *lvalue,
 705                 const char *rvalue,
 706                 void *data,
 707                 void *userdata) {
 708
 709         ExecContext *c = data;
 710         char *w;
 711         size_t l;
 712         char *state;
 713
 714         assert(filename);
 715         assert(lvalue);
 716         assert(rvalue);
 717         assert(data);
 718
 719         FOREACH_WORD(w, l, rvalue, state) {
 720                 char *t;
 721                 int r;
 722                 unsigned cpu;
 723
 724                 if (!(t = strndup(w, l)))
 725                         return -ENOMEM;
 726
 727                 r = safe_atou(t, &cpu);
 728                 free(t);
 729
 730                 if (r < 0 || cpu >= CPU_SETSIZE) {
 731                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 732                         return -EBADMSG;
 733                 }
 734
 735                 CPU_SET(cpu, &c->cpu_affinity);
 736         }
 737
 738         c->cpu_affinity_set = true;
 739
 740         return 0;
 741 }
 742
 743 static int config_parse_capabilities(
 744                 const char *filename,
 745                 unsigned line,
 746                 const char *section,
 747                 const char *lvalue,
 748                 const char *rvalue,
 749                 void *data,
 750                 void *userdata) {
 751
 752         ExecContext *c = data;
 753         cap_t cap;
 754
 755         assert(filename);
 756         assert(lvalue);
 757         assert(rvalue);
 758         assert(data);
 759
 760         if (!(cap = cap_from_text(rvalue))) {
 761                 if (errno == ENOMEM)
 762                         return -ENOMEM;
 763
 764                 log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
 765                 return -EBADMSG;
 766         }
 767
 768         if (c->capabilities)
 769                 cap_free(c->capabilities);
 770         c->capabilities = cap;
 771
 772         return 0;
 773 }
 774
 775 static int config_parse_secure_bits(
 776                 const char *filename,
 777                 unsigned line,
 778                 const char *section,
 779                 const char *lvalue,
 780                 const char *rvalue,
 781                 void *data,
 782                 void *userdata) {
 783
 784         ExecContext *c = data;
 785         char *w;
 786         size_t l;
 787         char *state;
 788
 789         assert(filename);
 790         assert(lvalue);
 791         assert(rvalue);
 792         assert(data);
 793
 794         FOREACH_WORD(w, l, rvalue, state) {
 795                 if (first_word(w, "keep-caps"))
 796                         c->secure_bits |= SECURE_KEEP_CAPS;
 797                 else if (first_word(w, "keep-caps-locked"))
 798                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 799                 else if (first_word(w, "no-setuid-fixup"))
 800                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 801                 else if (first_word(w, "no-setuid-fixup-locked"))
 802                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 803                 else if (first_word(w, "noroot"))
 804                         c->secure_bits |= SECURE_NOROOT;
 805                 else if (first_word(w, "noroot-locked"))
 806                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 807                 else {
 808                         log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
 809                         return -EBADMSG;
 810                 }
 811         }
 812
 813         return 0;
 814 }
 815
 816 static int config_parse_bounding_set(
 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         ExecContext *c = data;
 826         char *w;
 827         size_t l;
 828         char *state;
 829
 830         assert(filename);
 831         assert(lvalue);
 832         assert(rvalue);
 833         assert(data);
 834
 835         FOREACH_WORD(w, l, rvalue, state) {
 836                 char *t;
 837                 int r;
 838                 cap_value_t cap;
 839
 840                 if (!(t = strndup(w, l)))
 841                         return -ENOMEM;
 842
 843                 r = cap_from_name(t, &cap);
 844                 free(t);
 845
 846                 if (r < 0) {
 847                         log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
 848                         return -EBADMSG;
 849                 }
 850
 851                 c->capability_bounding_set_drop |= 1 << cap;
 852         }
 853
 854         return 0;
 855 }
 856
 857 static int config_parse_timer_slack_ns(
 858                 const char *filename,
 859                 unsigned line,
 860                 const char *section,
 861                 const char *lvalue,
 862                 const char *rvalue,
 863                 void *data,
 864                 void *userdata) {
 865
 866         ExecContext *c = data;
 867         unsigned long u;
 868         int r;
 869
 870         assert(filename);
 871         assert(lvalue);
 872         assert(rvalue);
 873         assert(data);
 874
 875         if ((r = safe_atolu(rvalue, &u)) < 0) {
 876                 log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
 877                 return r;
 878         }
 879
 880         c->timer_slack_ns = u;
 881
 882         return 0;
 883 }
 884
 885 static int config_parse_limit(
 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         struct rlimit **rl = data;
 895         unsigned long long u;
 896         int r;
 897
 898         assert(filename);
 899         assert(lvalue);
 900         assert(rvalue);
 901         assert(data);
 902
 903         if ((r = safe_atollu(rvalue, &u)) < 0) {
 904                 log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
 905                 return r;
 906         }
 907
 908         if (!*rl)
 909                 if (!(*rl = new(struct rlimit, 1)))
 910                         return -ENOMEM;
 911
 912         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
 913         return 0;
 914 }
 915
 916 static int config_parse_cgroup(
 917                 const char *filename,
 918                 unsigned line,
 919                 const char *section,
 920                 const char *lvalue,
 921                 const char *rvalue,
 922                 void *data,
 923                 void *userdata) {
 924
 925         Unit *u = userdata;
 926         char *w;
 927         size_t l;
 928         char *state;
 929
 930         FOREACH_WORD(w, l, rvalue, state) {
 931                 char *t;
 932                 int r;
 933
 934                 if (!(t = strndup(w, l)))
 935                         return -ENOMEM;
 936
 937                 r = unit_add_cgroup_from_text(u, t);
 938                 free(t);
 939
 940                 if (r < 0)
 941                         return r;
 942         }
 943
 944         return 0;
 945 }
 946
 947 static int config_parse_sysv_priority(
 948                 const char *filename,
 949                 unsigned line,
 950                 const char *section,
 951                 const char *lvalue,
 952                 const char *rvalue,
 953                 void *data,
 954                 void *userdata) {
 955
 956         int *priority = data;
 957         int r, i;
 958
 959         assert(filename);
 960         assert(lvalue);
 961         assert(rvalue);
 962         assert(data);
 963
 964         if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
 965                 log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
 966                 return r;
 967         }
 968
 969         *priority = (int) i;
 970         return 0;
 971 }
 972
 973 DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 974
 975 static int config_parse_mount_flags(
 976                 const char *filename,
 977                 unsigned line,
 978                 const char *section,
 979                 const char *lvalue,
 980                 const char *rvalue,
 981                 void *data,
 982                 void *userdata) {
 983
 984         ExecContext *c = data;
 985         char *w;
 986         size_t l;
 987         char *state;
 988         unsigned long flags = 0;
 989
 990         assert(filename);
 991         assert(lvalue);
 992         assert(rvalue);
 993         assert(data);
 994
 995         FOREACH_WORD(w, l, rvalue, state) {
 996                 if (strncmp(w, "shared", l) == 0)
 997                         flags |= MS_SHARED;
 998                 else if (strncmp(w, "slave", l) == 0)
 999                         flags |= MS_SLAVE;
1000                 else if (strncmp(w, "private", l) == 0)
1001                         flags |= MS_PRIVATE;
1002                 else {
1003                         log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
1004                         return -EINVAL;
1005                 }
1006         }
1007
1008         c->mount_flags = flags;
1009         return 0;
1010 }
1011
1012 static int config_parse_timer(
1013                 const char *filename,
1014                 unsigned line,
1015                 const char *section,
1016                 const char *lvalue,
1017                 const char *rvalue,
1018                 void *data,
1019                 void *userdata) {
1020
1021         Timer *t = data;
1022         usec_t u;
1023         int r;
1024         TimerValue *v;
1025         TimerBase b;
1026
1027         assert(filename);
1028         assert(lvalue);
1029         assert(rvalue);
1030         assert(data);
1031
1032         if ((b = timer_base_from_string(lvalue)) < 0) {
1033                 log_error("[%s:%u] Failed to parse timer base: %s", filename, line, lvalue);
1034                 return -EINVAL;
1035         }
1036
1037         if ((r = parse_usec(rvalue, &u)) < 0) {
1038                 log_error("[%s:%u] Failed to parse timer value: %s", filename, line, rvalue);
1039                 return r;
1040         }
1041
1042         if (!(v = new0(TimerValue, 1)))
1043                 return -ENOMEM;
1044
1045         v->base = b;
1046         v->value = u;
1047
1048         LIST_PREPEND(TimerValue, value, t->values, v);
1049
1050         return 0;
1051 }
1052
1053 static int config_parse_timer_unit(
1054                 const char *filename,
1055                 unsigned line,
1056                 const char *section,
1057                 const char *lvalue,
1058                 const char *rvalue,
1059                 void *data,
1060                 void *userdata) {
1061
1062         Timer *t = data;
1063         int r;
1064
1065         if (endswith(rvalue, ".timer")) {
1066                 log_error("[%s:%u] Unit cannot be of type timer: %s", filename, line, rvalue);
1067                 return -EINVAL;
1068         }
1069
1070         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &t->unit)) < 0) {
1071                 log_error("[%s:%u] Failed to load unit: %s", filename, line, rvalue);
1072                 return r;
1073         }
1074
1075         return 0;
1076 }
1077
1078 static int config_parse_path_spec(
1079                 const char *filename,
1080                 unsigned line,
1081                 const char *section,
1082                 const char *lvalue,
1083                 const char *rvalue,
1084                 void *data,
1085                 void *userdata) {
1086
1087         Path *p = data;
1088         PathSpec *s;
1089         PathType b;
1090
1091         assert(filename);
1092         assert(lvalue);
1093         assert(rvalue);
1094         assert(data);
1095
1096         if ((b = path_type_from_string(lvalue)) < 0) {
1097                 log_error("[%s:%u] Failed to parse path type: %s", filename, line, lvalue);
1098                 return -EINVAL;
1099         }
1100
1101         if (!path_is_absolute(rvalue)) {
1102                 log_error("[%s:%u] Path is not absolute: %s", filename, line, rvalue);
1103                 return -EINVAL;
1104         }
1105
1106         if (!(s = new0(PathSpec, 1)))
1107                 return -ENOMEM;
1108
1109         if (!(s->path = strdup(rvalue))) {
1110                 free(s);
1111                 return -ENOMEM;
1112         }
1113
1114         path_kill_slashes(s->path);
1115
1116         s->type = b;
1117         s->inotify_fd = -1;
1118
1119         LIST_PREPEND(PathSpec, spec, p->specs, s);
1120
1121         return 0;
1122 }
1123
1124 static int config_parse_path_unit(
1125                 const char *filename,
1126                 unsigned line,
1127                 const char *section,
1128                 const char *lvalue,
1129                 const char *rvalue,
1130                 void *data,
1131                 void *userdata) {
1132
1133         Path *t = data;
1134         int r;
1135
1136         if (endswith(rvalue, ".path")) {
1137                 log_error("[%s:%u] Unit cannot be of type path: %s", filename, line, rvalue);
1138                 return -EINVAL;
1139         }
1140
1141         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &t->unit)) < 0) {
1142                 log_error("[%s:%u] Failed to load unit: %s", filename, line, rvalue);
1143                 return r;
1144         }
1145
1146         return 0;
1147 }
1148
1149 static int config_parse_env_file(
1150                 const char *filename,
1151                 unsigned line,
1152                 const char *section,
1153                 const char *lvalue,
1154                 const char *rvalue,
1155                 void *data,
1156                 void *userdata) {
1157
1158         FILE *f;
1159         int r;
1160         char ***env = data;
1161
1162         assert(filename);
1163         assert(lvalue);
1164         assert(rvalue);
1165         assert(data);
1166
1167         if (!(f = fopen(rvalue, "re"))) {
1168                 log_error("[%s:%u] Failed to open environment file '%s': %m", filename, line, rvalue);
1169                 return -errno;
1170         }
1171
1172         while (!feof(f)) {
1173                 char l[LINE_MAX], *p;
1174                 char **t;
1175
1176                 if (!fgets(l, sizeof(l), f)) {
1177                         if (feof(f))
1178                                 break;
1179
1180                         r = -errno;
1181                         log_error("[%s:%u] Failed to read environment file '%s': %m", filename, line, rvalue);
1182                         goto finish;
1183                 }
1184
1185                 p = strstrip(l);
1186
1187                 if (!*p)
1188                         continue;
1189
1190                 if (strchr(COMMENTS, *p))
1191                         continue;
1192
1193                 t = strv_env_set(*env, p);
1194                 strv_free(*env);
1195                 *env = t;
1196         }
1197
1198         r = 0;
1199
1200 finish:
1201         if (f)
1202                 fclose(f);
1203
1204         return r;
1205 }
1206
1207 DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier");
1208
1209 #define FOLLOW_MAX 8
1210
1211 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
1212         unsigned c = 0;
1213         int fd, r;
1214         FILE *f;
1215         char *id = NULL;
1216
1217         assert(filename);
1218         assert(*filename);
1219         assert(_f);
1220         assert(names);
1221
1222         /* This will update the filename pointer if the loaded file is
1223          * reached by a symlink. The old string will be freed. */
1224
1225         for (;;) {
1226                 char *target, *name;
1227
1228                 if (c++ >= FOLLOW_MAX)
1229                         return -ELOOP;
1230
1231                 path_kill_slashes(*filename);
1232
1233                 /* Add the file name we are currently looking at to
1234                  * the names of this unit */
1235                 name = file_name_from_path(*filename);
1236                 if (!(id = set_get(names, name))) {
1237
1238                         if (!(id = strdup(name)))
1239                                 return -ENOMEM;
1240
1241                         if ((r = set_put(names, id)) < 0) {
1242                                 free(id);
1243                                 return r;
1244                         }
1245                 }
1246
1247                 /* Try to open the file name, but don't if its a symlink */
1248                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
1249                         break;
1250
1251                 if (errno != ELOOP)
1252                         return -errno;
1253
1254                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
1255                 if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
1256                         return r;
1257
1258                 free(*filename);
1259                 *filename = target;
1260         }
1261
1262         if (!(f = fdopen(fd, "r"))) {
1263                 r = -errno;
1264                 close_nointr_nofail(fd);
1265                 return r;
1266         }
1267
1268         *_f = f;
1269         *_final = id;
1270         return 0;
1271 }
1272
1273 static int merge_by_names(Unit **u, Set *names, const char *id) {
1274         char *k;
1275         int r;
1276
1277         assert(u);
1278         assert(*u);
1279         assert(names);
1280
1281         /* Let's try to add in all symlink names we found */
1282         while ((k = set_steal_first(names))) {
1283
1284                 /* First try to merge in the other name into our
1285                  * unit */
1286                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1287                         Unit *other;
1288
1289                         /* Hmm, we couldn't merge the other unit into
1290                          * ours? Then let's try it the other way
1291                          * round */
1292
1293                         other = manager_get_unit((*u)->meta.manager, k);
1294                         free(k);
1295
1296                         if (other)
1297                                 if ((r = unit_merge(other, *u)) >= 0) {
1298                                         *u = other;
1299                                         return merge_by_names(u, names, NULL);
1300                                 }
1301
1302                         return r;
1303                 }
1304
1305                 if (id == k)
1306                         unit_choose_id(*u, id);
1307
1308                 free(k);
1309         }
1310
1311         return 0;
1312 }
1313
1314 static void dump_items(FILE *f, const ConfigItem *items) {
1315         const ConfigItem *i;
1316         const char *prev_section = NULL;
1317         bool not_first = false;
1318
1319         struct {
1320                 ConfigParserCallback callback;
1321                 const char *rvalue;
1322         } table[] = {
1323                 { config_parse_int,              "INTEGER" },
1324                 { config_parse_unsigned,         "UNSIGNED" },
1325                 { config_parse_size,             "SIZE" },
1326                 { config_parse_bool,             "BOOLEAN" },
1327                 { config_parse_string,           "STRING" },
1328                 { config_parse_path,             "PATH" },
1329                 { config_parse_strv,             "STRING [...]" },
1330                 { config_parse_nice,             "NICE" },
1331                 { config_parse_oom_adjust,       "OOMADJUST" },
1332                 { config_parse_io_class,         "IOCLASS" },
1333                 { config_parse_io_priority,      "IOPRIORITY" },
1334                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1335                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1336                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1337                 { config_parse_mode,             "MODE" },
1338                 { config_parse_env_file,         "FILE" },
1339                 { config_parse_output,           "OUTPUT" },
1340                 { config_parse_input,            "INPUT" },
1341                 { config_parse_facility,         "FACILITY" },
1342                 { config_parse_level,            "LEVEL" },
1343                 { config_parse_capabilities,     "CAPABILITIES" },
1344                 { config_parse_secure_bits,      "SECUREBITS" },
1345                 { config_parse_bounding_set,     "BOUNDINGSET" },
1346                 { config_parse_timer_slack_ns,   "TIMERSLACK" },
1347                 { config_parse_limit,            "LIMIT" },
1348                 { config_parse_cgroup,           "CGROUP [...]" },
1349                 { config_parse_deps,             "UNIT [...]" },
1350                 { config_parse_names,            "UNIT [...]" },
1351                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1352                 { config_parse_service_type,     "SERVICETYPE" },
1353                 { config_parse_service_restart,  "SERVICERESTART" },
1354                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1355                 { config_parse_kill_mode,        "KILLMODE" },
1356                 { config_parse_listen,           "SOCKET [...]" },
1357                 { config_parse_socket_bind,      "SOCKETBIND" },
1358                 { config_parse_bindtodevice,     "NETWORKINTERFACE" },
1359                 { config_parse_usec,             "SECONDS" },
1360                 { config_parse_path_strv,        "PATH [...]" },
1361                 { config_parse_mount_flags,      "MOUNTFLAG [...]" },
1362                 { config_parse_description,      "DESCRIPTION" },
1363                 { config_parse_timer,            "TIMER" },
1364                 { config_parse_timer_unit,       "NAME" },
1365                 { config_parse_path_spec,        "PATH" },
1366                 { config_parse_path_unit,        "UNIT" },
1367                 { config_parse_notify_access,    "ACCESS" }
1368         };
1369
1370         assert(f);
1371         assert(items);
1372
1373         for (i = items; i->lvalue; i++) {
1374                 unsigned j;
1375                 const char *rvalue = "OTHER";
1376
1377                 if (!streq_ptr(i->section, prev_section)) {
1378                         if (!not_first)
1379                                 not_first = true;
1380                         else
1381                                 fputc('\n', f);
1382
1383                         fprintf(f, "[%s]\n", i->section);
1384                         prev_section = i->section;
1385                 }
1386
1387                 for (j = 0; j < ELEMENTSOF(table); j++)
1388                         if (i->parse == table[j].callback) {
1389                                 rvalue = table[j].rvalue;
1390                                 break;
1391                         }
1392
1393                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1394         }
1395 }
1396
1397 static int load_from_path(Unit *u, const char *path) {
1398
1399         static const char* const section_table[_UNIT_TYPE_MAX] = {
1400                 [UNIT_SERVICE]   = "Service",
1401                 [UNIT_TIMER]     = "Timer",
1402                 [UNIT_SOCKET]    = "Socket",
1403                 [UNIT_TARGET]    = "Target",
1404                 [UNIT_DEVICE]    = "Device",
1405                 [UNIT_MOUNT]     = "Mount",
1406                 [UNIT_AUTOMOUNT] = "Automount",
1407                 [UNIT_SNAPSHOT]  = "Snapshot",
1408                 [UNIT_SWAP]      = "Swap",
1409                 [UNIT_PATH]      = "Path"
1410         };
1411
1412 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1413                 { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
1414                 { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
1415                 { "User",                   config_parse_string,          &(context).user,                                 section   }, \
1416                 { "Group",                  config_parse_string,          &(context).group,                                section   }, \
1417                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
1418                 { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
1419                 { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
1420                 { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
1421                 { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
1422                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
1423                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
1424                 { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
1425                 { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
1426                 { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
1427                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
1428                 { "EnvironmentFile",        config_parse_env_file,        &(context).environment,                          section   }, \
1429                 { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
1430                 { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
1431                 { "StandardError",          config_parse_output,          &(context).std_error,                            section   }, \
1432                 { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
1433                 { "SyslogIdentifier",       config_parse_string,          &(context).syslog_identifier,                    section   }, \
1434                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
1435                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
1436                 { "SyslogNoPrefix",         config_parse_bool,            &(context).syslog_no_prefix,                     section   }, \
1437                 { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
1438                 { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
1439                 { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
1440                 { "TimerSlackNS",           config_parse_timer_slack_ns,  &(context),                                      section   }, \
1441                 { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
1442                 { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1443                 { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
1444                 { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
1445                 { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
1446                 { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
1447                 { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1448                 { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
1449                 { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1450                 { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1451                 { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1452                 { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1453                 { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1454                 { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
1455                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1456                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1457                 { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
1458                 { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
1459                 { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
1460                 { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
1461                 { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
1462                 { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }, \
1463                 { "TCPWrapName",            config_parse_string,          &(context).tcpwrap_name,                         section   }, \
1464                 { "PAMName",                config_parse_string,          &(context).pam_name,                             section   }
1465
1466         const ConfigItem items[] = {
1467                 { "Names",                  config_parse_names,           u,                                               "Unit"    },
1468                 { "Description",            config_parse_description,     u,                                               "Unit"    },
1469                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1470                 { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1471                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1472                 { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1473                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1474                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1475                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1476                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1477                 { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
1478                 { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
1479                 { "OnlyByDependency",       config_parse_bool,            &u->meta.only_by_dependency,                     "Unit"    },
1480
1481                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
1482                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1483                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1484                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1485                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1486                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1487                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1488                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
1489                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
1490                 { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
1491                 { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
1492                 { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
1493                 { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
1494                 { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
1495                 { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
1496                 { "KillMode",               config_parse_kill_mode,       &u->service.kill_mode,                           "Service" },
1497                 { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
1498                 { "BusName",                config_parse_string,          &u->service.bus_name,                            "Service" },
1499                 { "NotifyAccess",           config_parse_notify_access,   &u->service.notify_access,                       "Service" },
1500                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1501
1502                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
1503                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
1504                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
1505                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
1506                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
1507                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
1508                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
1509                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
1510                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
1511                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
1512                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
1513                 { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
1514                 { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
1515                 { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
1516                 { "KillMode",               config_parse_kill_mode,       &u->socket.kill_mode,                            "Socket"  },
1517                 { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
1518                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
1519
1520                 { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
1521                 { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
1522                 { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
1523                 { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
1524                 { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
1525                 { "KillMode",               config_parse_kill_mode,       &u->mount.kill_mode,                             "Mount"   },
1526                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
1527
1528                 { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
1529
1530                 { "What",                   config_parse_path,            &u->swap.parameters_fragment.what,               "Swap"    },
1531                 { "Priority",               config_parse_int,             &u->swap.parameters_fragment.priority,           "Swap"    },
1532
1533                 { "OnActive",               config_parse_timer,           &u->timer,                                       "Timer"   },
1534                 { "OnBoot",                 config_parse_timer,           &u->timer,                                       "Timer"   },
1535                 { "OnStartup",              config_parse_timer,           &u->timer,                                       "Timer"   },
1536                 { "OnUnitActive",           config_parse_timer,           &u->timer,                                       "Timer"   },
1537                 { "OnUnitInactive",         config_parse_timer,           &u->timer,                                       "Timer"   },
1538                 { "Unit",                   config_parse_timer_unit,      &u->timer,                                       "Timer"   },
1539
1540                 { "PathExists",             config_parse_path_spec,       &u->path,                                        "Path"    },
1541                 { "PathChanged",            config_parse_path_spec,       &u->path,                                        "Path"    },
1542                 { "DirectoryNotEmpty",      config_parse_path_spec,       &u->path,                                        "Path"    },
1543                 { "Unit",                   config_parse_path_unit,       &u->path,                                        "Path"    },
1544
1545                 /* The [Install] section is ignored here. */
1546                 { "Alias",                  NULL,                         NULL,                                            "Install" },
1547                 { "WantedBy",               NULL,                         NULL,                                            "Install" },
1548                 { "Also",                   NULL,                         NULL,                                            "Install" },
1549
1550                 { NULL, NULL, NULL, NULL }
1551         };
1552
1553 #undef EXEC_CONTEXT_CONFIG_ITEMS
1554
1555         const char *sections[4];
1556         int r;
1557         Set *symlink_names;
1558         FILE *f = NULL;
1559         char *filename = NULL, *id = NULL;
1560         Unit *merged;
1561
1562         if (!u) {
1563                 /* Dirty dirty hack. */
1564                 dump_items((FILE*) path, items);
1565                 return 0;
1566         }
1567
1568         assert(u);
1569         assert(path);
1570
1571         sections[0] = "Unit";
1572         sections[1] = section_table[u->meta.type];
1573         sections[2] = "Install";
1574         sections[3] = NULL;
1575
1576         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
1577                 return -ENOMEM;
1578
1579         if (path_is_absolute(path)) {
1580
1581                 if (!(filename = strdup(path))) {
1582                         r = -ENOMEM;
1583                         goto finish;
1584                 }
1585
1586                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1587                         free(filename);
1588                         filename = NULL;
1589
1590                         if (r != -ENOENT)
1591                                 goto finish;
1592                 }
1593
1594         } else  {
1595                 char **p;
1596
1597                 STRV_FOREACH(p, u->meta.manager->lookup_paths.unit_path) {
1598
1599                         /* Instead of opening the path right away, we manually
1600                          * follow all symlinks and add their name to our unit
1601                          * name set while doing so */
1602                         if (!(filename = path_make_absolute(path, *p))) {
1603                                 r = -ENOMEM;
1604                                 goto finish;
1605                         }
1606
1607                         if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1608                                 char *sn;
1609
1610                                 free(filename);
1611                                 filename = NULL;
1612
1613                                 if (r != -ENOENT)
1614                                         goto finish;
1615
1616                                 /* Empty the symlink names for the next run */
1617                                 while ((sn = set_steal_first(symlink_names)))
1618                                         free(sn);
1619
1620                                 continue;
1621                         }
1622
1623                         break;
1624                 }
1625         }
1626
1627         if (!filename) {
1628                 r = 0;
1629                 goto finish;
1630         }
1631
1632         merged = u;
1633         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
1634                 goto finish;
1635
1636         if (merged != u) {
1637                 u->meta.load_state = UNIT_MERGED;
1638                 r = 0;
1639                 goto finish;
1640         }
1641
1642         /* Now, parse the file contents */
1643         if ((r = config_parse(filename, f, sections, items, false, u)) < 0)
1644                 goto finish;
1645
1646         free(u->meta.fragment_path);
1647         u->meta.fragment_path = filename;
1648         filename = NULL;
1649
1650         u->meta.load_state = UNIT_LOADED;
1651         r = 0;
1652
1653 finish:
1654         set_free_free(symlink_names);
1655         free(filename);
1656
1657         if (f)
1658                 fclose(f);
1659
1660         return r;
1661 }
1662
1663 int unit_load_fragment(Unit *u) {
1664         int r;
1665
1666         assert(u);
1667
1668         if (u->meta.fragment_path) {
1669
1670                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
1671                         return r;
1672
1673         } else {
1674                 Iterator i;
1675                 const char *t;
1676
1677                 /* Try to find the unit under its id */
1678                 if ((r = load_from_path(u, u->meta.id)) < 0)
1679                         return r;
1680
1681                 /* Try to find an alias we can load this with */
1682                 if (u->meta.load_state == UNIT_STUB)
1683                         SET_FOREACH(t, u->meta.names, i) {
1684
1685                                 if (t == u->meta.id)
1686                                         continue;
1687
1688                                 if ((r = load_from_path(u, t)) < 0)
1689                                         return r;
1690
1691                                 if (u->meta.load_state != UNIT_STUB)
1692                                         break;
1693                         }
1694
1695                 /* Now, follow the same logic, but look for a template */
1696                 if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
1697                         char *k;
1698
1699                         if (!(k = unit_name_template(u->meta.id)))
1700                                 return -ENOMEM;
1701
1702                         r = load_from_path(u, k);
1703                         free(k);
1704
1705                         if (r < 0)
1706                                 return r;
1707
1708                         if (u->meta.load_state == UNIT_STUB)
1709                                 SET_FOREACH(t, u->meta.names, i) {
1710
1711                                         if (t == u->meta.id)
1712                                                 continue;
1713
1714                                         if (!(k = unit_name_template(t)))
1715                                                 return -ENOMEM;
1716
1717                                         r = load_from_path(u, k);
1718                                         free(k);
1719
1720                                         if (r < 0)
1721                                                 return r;
1722
1723                                         if (u->meta.load_state != UNIT_STUB)
1724                                                 break;
1725                                 }
1726                 }
1727         }
1728
1729         return 0;
1730 }
1731
1732 void unit_dump_config_items(FILE *f) {
1733         /* OK, this wins a prize for extreme ugliness. */
1734
1735         load_from_path(NULL, (const void*) f);
1736 }