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 #include "bus-errors.h"
  43
  44 #define COMMENTS "#;\n"
  45
  46 static int config_parse_deps(
  47                 const char *filename,
  48                 unsigned line,
  49                 const char *section,
  50                 const char *lvalue,
  51                 const char *rvalue,
  52                 void *data,
  53                 void *userdata) {
  54
  55         UnitDependency d = PTR_TO_UINT(data);
  56         Unit *u = userdata;
  57         char *w;
  58         size_t l;
  59         char *state;
  60
  61         assert(filename);
  62         assert(lvalue);
  63         assert(rvalue);
  64
  65         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
  66                 char *t, *k;
  67                 int r;
  68
  69                 if (!(t = strndup(w, l)))
  70                         return -ENOMEM;
  71
  72                 k = unit_name_printf(u, t);
  73                 free(t);
  74
  75                 if (!k)
  76                         return -ENOMEM;
  77
  78                 r = unit_add_dependency_by_name(u, d, k, NULL, true);
  79                 free(k);
  80
  81                 if (r < 0)
  82                         return r;
  83         }
  84
  85         return 0;
  86 }
  87
  88 static int config_parse_names(
  89                 const char *filename,
  90                 unsigned line,
  91                 const char *section,
  92                 const char *lvalue,
  93                 const char *rvalue,
  94                 void *data,
  95                 void *userdata) {
  96
  97         Unit *u = userdata;
  98         char *w;
  99         size_t l;
 100         char *state;
 101
 102         assert(filename);
 103         assert(lvalue);
 104         assert(rvalue);
 105         assert(data);
 106
 107         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 108                 char *t, *k;
 109                 int r;
 110
 111                 if (!(t = strndup(w, l)))
 112                         return -ENOMEM;
 113
 114                 k = unit_name_printf(u, t);
 115                 free(t);
 116
 117                 if (!k)
 118                         return -ENOMEM;
 119
 120                 r = unit_merge_by_name(u, k);
 121                 free(k);
 122
 123                 if (r < 0)
 124                         return r;
 125         }
 126
 127         return 0;
 128 }
 129
 130 static int config_parse_string_printf(
 131                 const char *filename,
 132                 unsigned line,
 133                 const char *section,
 134                 const char *lvalue,
 135                 const char *rvalue,
 136                 void *data,
 137                 void *userdata) {
 138
 139         Unit *u = userdata;
 140         char **s = data;
 141         char *k;
 142
 143         assert(filename);
 144         assert(lvalue);
 145         assert(rvalue);
 146         assert(s);
 147         assert(u);
 148
 149         if (!(k = unit_full_printf(u, rvalue)))
 150                 return -ENOMEM;
 151
 152         free(*s);
 153         if (*k)
 154                 *s = k;
 155         else {
 156                 free(k);
 157                 *s = NULL;
 158         }
 159
 160         return 0;
 161 }
 162
 163 static int config_parse_listen(
 164                 const char *filename,
 165                 unsigned line,
 166                 const char *section,
 167                 const char *lvalue,
 168                 const char *rvalue,
 169                 void *data,
 170                 void *userdata) {
 171
 172         int r;
 173         SocketPort *p;
 174         Socket *s;
 175
 176         assert(filename);
 177         assert(lvalue);
 178         assert(rvalue);
 179         assert(data);
 180
 181         s = (Socket*) data;
 182
 183         if (!(p = new0(SocketPort, 1)))
 184                 return -ENOMEM;
 185
 186         if (streq(lvalue, "ListenFIFO")) {
 187                 p->type = SOCKET_FIFO;
 188
 189                 if (!(p->path = strdup(rvalue))) {
 190                         free(p);
 191                         return -ENOMEM;
 192                 }
 193
 194                 path_kill_slashes(p->path);
 195         } else {
 196                 p->type = SOCKET_SOCKET;
 197
 198                 if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
 199                         log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
 200                         free(p);
 201                         return r;
 202                 }
 203
 204                 if (streq(lvalue, "ListenStream"))
 205                         p->address.type = SOCK_STREAM;
 206                 else if (streq(lvalue, "ListenDatagram"))
 207                         p->address.type = SOCK_DGRAM;
 208                 else {
 209                         assert(streq(lvalue, "ListenSequentialPacket"));
 210                         p->address.type = SOCK_SEQPACKET;
 211                 }
 212
 213                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
 214                         free(p);
 215                         return -EPROTONOSUPPORT;
 216                 }
 217         }
 218
 219         p->fd = -1;
 220         LIST_PREPEND(SocketPort, port, s->ports, p);
 221
 222         return 0;
 223 }
 224
 225 static int config_parse_socket_bind(
 226                 const char *filename,
 227                 unsigned line,
 228                 const char *section,
 229                 const char *lvalue,
 230                 const char *rvalue,
 231                 void *data,
 232                 void *userdata) {
 233
 234         Socket *s;
 235         SocketAddressBindIPv6Only b;
 236
 237         assert(filename);
 238         assert(lvalue);
 239         assert(rvalue);
 240         assert(data);
 241
 242         s = (Socket*) data;
 243
 244         if ((b = socket_address_bind_ipv6_only_from_string(rvalue)) < 0) {
 245                 int r;
 246
 247                 if ((r = parse_boolean(rvalue)) < 0) {
 248                         log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
 249                         return -EBADMSG;
 250                 }
 251
 252                 s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
 253         } else
 254                 s->bind_ipv6_only = b;
 255
 256         return 0;
 257 }
 258
 259 static int config_parse_nice(
 260                 const char *filename,
 261                 unsigned line,
 262                 const char *section,
 263                 const char *lvalue,
 264                 const char *rvalue,
 265                 void *data,
 266                 void *userdata) {
 267
 268         ExecContext *c = data;
 269         int priority, r;
 270
 271         assert(filename);
 272         assert(lvalue);
 273         assert(rvalue);
 274         assert(data);
 275
 276         if ((r = safe_atoi(rvalue, &priority)) < 0) {
 277                 log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
 278                 return r;
 279         }
 280
 281         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
 282                 log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
 283                 return -ERANGE;
 284         }
 285
 286         c->nice = priority;
 287         c->nice_set = false;
 288
 289         return 0;
 290 }
 291
 292 static int config_parse_oom_adjust(
 293                 const char *filename,
 294                 unsigned line,
 295                 const char *section,
 296                 const char *lvalue,
 297                 const char *rvalue,
 298                 void *data,
 299                 void *userdata) {
 300
 301         ExecContext *c = data;
 302         int oa, r;
 303
 304         assert(filename);
 305         assert(lvalue);
 306         assert(rvalue);
 307         assert(data);
 308
 309         if ((r = safe_atoi(rvalue, &oa)) < 0) {
 310                 log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
 311                 return r;
 312         }
 313
 314         if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
 315                 log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
 316                 return -ERANGE;
 317         }
 318
 319         c->oom_adjust = oa;
 320         c->oom_adjust_set = true;
 321
 322         return 0;
 323 }
 324
 325 static int config_parse_mode(
 326                 const char *filename,
 327                 unsigned line,
 328                 const char *section,
 329                 const char *lvalue,
 330                 const char *rvalue,
 331                 void *data,
 332                 void *userdata) {
 333
 334         mode_t *m = data;
 335         long l;
 336         char *x = NULL;
 337
 338         assert(filename);
 339         assert(lvalue);
 340         assert(rvalue);
 341         assert(data);
 342
 343         errno = 0;
 344         l = strtol(rvalue, &x, 8);
 345         if (!x || *x || errno) {
 346                 log_error("[%s:%u] Failed to parse mode value: %s", filename, line, rvalue);
 347                 return errno ? -errno : -EINVAL;
 348         }
 349
 350         if (l < 0000 || l > 07777) {
 351                 log_error("[%s:%u] mode value out of range: %s", filename, line, rvalue);
 352                 return -ERANGE;
 353         }
 354
 355         *m = (mode_t) l;
 356         return 0;
 357 }
 358
 359 static int config_parse_exec(
 360                 const char *filename,
 361                 unsigned line,
 362                 const char *section,
 363                 const char *lvalue,
 364                 const char *rvalue,
 365                 void *data,
 366                 void *userdata) {
 367
 368         ExecCommand **e = data, *nce;
 369         char *path, **n;
 370         unsigned k;
 371
 372         assert(filename);
 373         assert(lvalue);
 374         assert(rvalue);
 375         assert(e);
 376
 377         /* We accept an absolute path as first argument, or
 378          * alternatively an absolute prefixed with @ to allow
 379          * overriding of argv[0]. */
 380
 381         for (;;) {
 382                 char *w;
 383                 size_t l;
 384                 char *state;
 385                 bool honour_argv0, write_to_path;
 386
 387                 path = NULL;
 388                 nce = NULL;
 389                 n = NULL;
 390
 391                 rvalue += strspn(rvalue, WHITESPACE);
 392
 393                 if (rvalue[0] == 0)
 394                         break;
 395
 396                 honour_argv0 = rvalue[0] == '@';
 397
 398                 if (rvalue[honour_argv0 ? 1 : 0] != '/') {
 399                         log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
 400                         return -EINVAL;
 401                 }
 402
 403                 k = 0;
 404                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 405                         if (strncmp(w, ";", l) == 0)
 406                                 break;
 407
 408                         k++;
 409                 }
 410
 411                 if (!(n = new(char*, k + (honour_argv0 ? 0 : 1))))
 412                         return -ENOMEM;
 413
 414                 k = 0;
 415                 write_to_path = honour_argv0;
 416                 FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 417                         if (strncmp(w, ";", l) == 0)
 418                                 break;
 419
 420                         if (write_to_path) {
 421                                 if (!(path = cunescape_length(w+1, l-1)))
 422                                         goto fail;
 423                                 write_to_path = false;
 424                         } else {
 425                                 if (!(n[k++] = cunescape_length(w, l)))
 426                                         goto fail;
 427                         }
 428                 }
 429
 430                 n[k] = NULL;
 431
 432                 if (!n[0]) {
 433                         log_error("[%s:%u] Invalid command line: %s", filename, line, rvalue);
 434                         strv_free(n);
 435                         return -EINVAL;
 436                 }
 437
 438                 if (!path)
 439                         if (!(path = strdup(n[0])))
 440                                 goto fail;
 441
 442                 assert(path_is_absolute(path));
 443
 444                 if (!(nce = new0(ExecCommand, 1)))
 445                         goto fail;
 446
 447                 nce->argv = n;
 448                 nce->path = path;
 449
 450                 path_kill_slashes(nce->path);
 451
 452                 exec_command_append_list(e, nce);
 453
 454                 rvalue = state;
 455         }
 456
 457         return 0;
 458
 459 fail:
 460         n[k] = NULL;
 461         strv_free(n);
 462         free(path);
 463         free(nce);
 464
 465         return -ENOMEM;
 466 }
 467
 468 static int config_parse_usec(
 469                 const char *filename,
 470                 unsigned line,
 471                 const char *section,
 472                 const char *lvalue,
 473                 const char *rvalue,
 474                 void *data,
 475                 void *userdata) {
 476
 477         usec_t *usec = data;
 478         int r;
 479
 480         assert(filename);
 481         assert(lvalue);
 482         assert(rvalue);
 483         assert(data);
 484
 485         if ((r = parse_usec(rvalue, usec)) < 0) {
 486                 log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
 487                 return r;
 488         }
 489
 490         return 0;
 491 }
 492
 493 static DEFINE_CONFIG_PARSE_ENUM(config_parse_service_type, service_type, ServiceType, "Failed to parse service type");
 494 static DEFINE_CONFIG_PARSE_ENUM(config_parse_service_restart, service_restart, ServiceRestart, "Failed to parse service restart specifier");
 495
 496 static int config_parse_bindtodevice(
 497                 const char *filename,
 498                 unsigned line,
 499                 const char *section,
 500                 const char *lvalue,
 501                 const char *rvalue,
 502                 void *data,
 503                 void *userdata) {
 504
 505         Socket *s = data;
 506         char *n;
 507
 508         assert(filename);
 509         assert(lvalue);
 510         assert(rvalue);
 511         assert(data);
 512
 513         if (rvalue[0] && !streq(rvalue, "*")) {
 514                 if (!(n = strdup(rvalue)))
 515                         return -ENOMEM;
 516         } else
 517                 n = NULL;
 518
 519         free(s->bind_to_device);
 520         s->bind_to_device = n;
 521
 522         return 0;
 523 }
 524
 525 static DEFINE_CONFIG_PARSE_ENUM(config_parse_output, exec_output, ExecOutput, "Failed to parse output specifier");
 526 static DEFINE_CONFIG_PARSE_ENUM(config_parse_input, exec_input, ExecInput, "Failed to parse input specifier");
 527
 528 static int config_parse_facility(
 529                 const char *filename,
 530                 unsigned line,
 531                 const char *section,
 532                 const char *lvalue,
 533                 const char *rvalue,
 534                 void *data,
 535                 void *userdata) {
 536
 537
 538         int *o = data, x;
 539
 540         assert(filename);
 541         assert(lvalue);
 542         assert(rvalue);
 543         assert(data);
 544
 545         if ((x = log_facility_from_string(rvalue)) < 0) {
 546                 log_error("[%s:%u] Failed to parse log facility: %s", filename, line, rvalue);
 547                 return -EBADMSG;
 548         }
 549
 550         *o = LOG_MAKEPRI(x, LOG_PRI(*o));
 551
 552         return 0;
 553 }
 554
 555 static int config_parse_level(
 556                 const char *filename,
 557                 unsigned line,
 558                 const char *section,
 559                 const char *lvalue,
 560                 const char *rvalue,
 561                 void *data,
 562                 void *userdata) {
 563
 564
 565         int *o = data, x;
 566
 567         assert(filename);
 568         assert(lvalue);
 569         assert(rvalue);
 570         assert(data);
 571
 572         if ((x = log_level_from_string(rvalue)) < 0) {
 573                 log_error("[%s:%u] Failed to parse log level: %s", filename, line, rvalue);
 574                 return -EBADMSG;
 575         }
 576
 577         *o = LOG_MAKEPRI(LOG_FAC(*o), x);
 578         return 0;
 579 }
 580
 581 static int config_parse_io_class(
 582                 const char *filename,
 583                 unsigned line,
 584                 const char *section,
 585                 const char *lvalue,
 586                 const char *rvalue,
 587                 void *data,
 588                 void *userdata) {
 589
 590         ExecContext *c = data;
 591         int x;
 592
 593         assert(filename);
 594         assert(lvalue);
 595         assert(rvalue);
 596         assert(data);
 597
 598         if ((x = ioprio_class_from_string(rvalue)) < 0) {
 599                 log_error("[%s:%u] Failed to parse IO scheduling class: %s", filename, line, rvalue);
 600                 return -EBADMSG;
 601         }
 602
 603         c->ioprio = IOPRIO_PRIO_VALUE(x, IOPRIO_PRIO_DATA(c->ioprio));
 604         c->ioprio_set = true;
 605
 606         return 0;
 607 }
 608
 609 static int config_parse_io_priority(
 610                 const char *filename,
 611                 unsigned line,
 612                 const char *section,
 613                 const char *lvalue,
 614                 const char *rvalue,
 615                 void *data,
 616                 void *userdata) {
 617
 618         ExecContext *c = data;
 619         int i;
 620
 621         assert(filename);
 622         assert(lvalue);
 623         assert(rvalue);
 624         assert(data);
 625
 626         if (safe_atoi(rvalue, &i) < 0 || i < 0 || i >= IOPRIO_BE_NR) {
 627                 log_error("[%s:%u] Failed to parse io priority: %s", filename, line, rvalue);
 628                 return -EBADMSG;
 629         }
 630
 631         c->ioprio = IOPRIO_PRIO_VALUE(IOPRIO_PRIO_CLASS(c->ioprio), i);
 632         c->ioprio_set = true;
 633
 634         return 0;
 635 }
 636
 637 static int config_parse_cpu_sched_policy(
 638                 const char *filename,
 639                 unsigned line,
 640                 const char *section,
 641                 const char *lvalue,
 642                 const char *rvalue,
 643                 void *data,
 644                 void *userdata) {
 645
 646
 647         ExecContext *c = data;
 648         int x;
 649
 650         assert(filename);
 651         assert(lvalue);
 652         assert(rvalue);
 653         assert(data);
 654
 655         if ((x = sched_policy_from_string(rvalue)) < 0) {
 656                 log_error("[%s:%u] Failed to parse CPU scheduling policy: %s", filename, line, rvalue);
 657                 return -EBADMSG;
 658         }
 659
 660         c->cpu_sched_policy = x;
 661         c->cpu_sched_set = true;
 662
 663         return 0;
 664 }
 665
 666 static int config_parse_cpu_sched_prio(
 667                 const char *filename,
 668                 unsigned line,
 669                 const char *section,
 670                 const char *lvalue,
 671                 const char *rvalue,
 672                 void *data,
 673                 void *userdata) {
 674
 675         ExecContext *c = data;
 676         int i;
 677
 678         assert(filename);
 679         assert(lvalue);
 680         assert(rvalue);
 681         assert(data);
 682
 683         /* On Linux RR/FIFO have the same range */
 684         if (safe_atoi(rvalue, &i) < 0 || i < sched_get_priority_min(SCHED_RR) || i > sched_get_priority_max(SCHED_RR)) {
 685                 log_error("[%s:%u] Failed to parse CPU scheduling priority: %s", filename, line, rvalue);
 686                 return -EBADMSG;
 687         }
 688
 689         c->cpu_sched_priority = i;
 690         c->cpu_sched_set = true;
 691
 692         return 0;
 693 }
 694
 695 static int config_parse_cpu_affinity(
 696                 const char *filename,
 697                 unsigned line,
 698                 const char *section,
 699                 const char *lvalue,
 700                 const char *rvalue,
 701                 void *data,
 702                 void *userdata) {
 703
 704         ExecContext *c = data;
 705         char *w;
 706         size_t l;
 707         char *state;
 708
 709         assert(filename);
 710         assert(lvalue);
 711         assert(rvalue);
 712         assert(data);
 713
 714         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 715                 char *t;
 716                 int r;
 717                 unsigned cpu;
 718
 719                 if (!(t = strndup(w, l)))
 720                         return -ENOMEM;
 721
 722                 r = safe_atou(t, &cpu);
 723                 free(t);
 724
 725                 if (!(c->cpuset))
 726                         if (!(c->cpuset = cpu_set_malloc(&c->cpuset_ncpus)))
 727                                 return -ENOMEM;
 728
 729                 if (r < 0 || cpu >= c->cpuset_ncpus) {
 730                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 731                         return -EBADMSG;
 732                 }
 733
 734                 CPU_SET_S(cpu, CPU_ALLOC_SIZE(c->cpuset_ncpus), c->cpuset);
 735         }
 736
 737         return 0;
 738 }
 739
 740 static int config_parse_capabilities(
 741                 const char *filename,
 742                 unsigned line,
 743                 const char *section,
 744                 const char *lvalue,
 745                 const char *rvalue,
 746                 void *data,
 747                 void *userdata) {
 748
 749         ExecContext *c = data;
 750         cap_t cap;
 751
 752         assert(filename);
 753         assert(lvalue);
 754         assert(rvalue);
 755         assert(data);
 756
 757         if (!(cap = cap_from_text(rvalue))) {
 758                 if (errno == ENOMEM)
 759                         return -ENOMEM;
 760
 761                 log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
 762                 return -EBADMSG;
 763         }
 764
 765         if (c->capabilities)
 766                 cap_free(c->capabilities);
 767         c->capabilities = cap;
 768
 769         return 0;
 770 }
 771
 772 static int config_parse_secure_bits(
 773                 const char *filename,
 774                 unsigned line,
 775                 const char *section,
 776                 const char *lvalue,
 777                 const char *rvalue,
 778                 void *data,
 779                 void *userdata) {
 780
 781         ExecContext *c = data;
 782         char *w;
 783         size_t l;
 784         char *state;
 785
 786         assert(filename);
 787         assert(lvalue);
 788         assert(rvalue);
 789         assert(data);
 790
 791         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 792                 if (first_word(w, "keep-caps"))
 793                         c->secure_bits |= SECURE_KEEP_CAPS;
 794                 else if (first_word(w, "keep-caps-locked"))
 795                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 796                 else if (first_word(w, "no-setuid-fixup"))
 797                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 798                 else if (first_word(w, "no-setuid-fixup-locked"))
 799                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 800                 else if (first_word(w, "noroot"))
 801                         c->secure_bits |= SECURE_NOROOT;
 802                 else if (first_word(w, "noroot-locked"))
 803                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 804                 else {
 805                         log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
 806                         return -EBADMSG;
 807                 }
 808         }
 809
 810         return 0;
 811 }
 812
 813 static int config_parse_bounding_set(
 814                 const char *filename,
 815                 unsigned line,
 816                 const char *section,
 817                 const char *lvalue,
 818                 const char *rvalue,
 819                 void *data,
 820                 void *userdata) {
 821
 822         ExecContext *c = data;
 823         char *w;
 824         size_t l;
 825         char *state;
 826
 827         assert(filename);
 828         assert(lvalue);
 829         assert(rvalue);
 830         assert(data);
 831
 832         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 833                 char *t;
 834                 int r;
 835                 cap_value_t cap;
 836
 837                 if (!(t = strndup(w, l)))
 838                         return -ENOMEM;
 839
 840                 r = cap_from_name(t, &cap);
 841                 free(t);
 842
 843                 if (r < 0) {
 844                         log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
 845                         return -EBADMSG;
 846                 }
 847
 848                 c->capability_bounding_set_drop |= 1 << cap;
 849         }
 850
 851         return 0;
 852 }
 853
 854 static int config_parse_timer_slack_nsec(
 855                 const char *filename,
 856                 unsigned line,
 857                 const char *section,
 858                 const char *lvalue,
 859                 const char *rvalue,
 860                 void *data,
 861                 void *userdata) {
 862
 863         ExecContext *c = data;
 864         unsigned long u;
 865         int r;
 866
 867         assert(filename);
 868         assert(lvalue);
 869         assert(rvalue);
 870         assert(data);
 871
 872         if ((r = safe_atolu(rvalue, &u)) < 0) {
 873                 log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
 874                 return r;
 875         }
 876
 877         c->timer_slack_nsec = u;
 878
 879         return 0;
 880 }
 881
 882 static int config_parse_limit(
 883                 const char *filename,
 884                 unsigned line,
 885                 const char *section,
 886                 const char *lvalue,
 887                 const char *rvalue,
 888                 void *data,
 889                 void *userdata) {
 890
 891         struct rlimit **rl = data;
 892         unsigned long long u;
 893         int r;
 894
 895         assert(filename);
 896         assert(lvalue);
 897         assert(rvalue);
 898         assert(data);
 899
 900         if ((r = safe_atollu(rvalue, &u)) < 0) {
 901                 log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
 902                 return r;
 903         }
 904
 905         if (!*rl)
 906                 if (!(*rl = new(struct rlimit, 1)))
 907                         return -ENOMEM;
 908
 909         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
 910         return 0;
 911 }
 912
 913 static int config_parse_cgroup(
 914                 const char *filename,
 915                 unsigned line,
 916                 const char *section,
 917                 const char *lvalue,
 918                 const char *rvalue,
 919                 void *data,
 920                 void *userdata) {
 921
 922         Unit *u = userdata;
 923         char *w;
 924         size_t l;
 925         char *state;
 926
 927         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
 928                 char *t;
 929                 int r;
 930
 931                 if (!(t = cunescape_length(w, l)))
 932                         return -ENOMEM;
 933
 934                 r = unit_add_cgroup_from_text(u, t);
 935                 free(t);
 936
 937                 if (r < 0)
 938                         return r;
 939         }
 940
 941         return 0;
 942 }
 943
 944 static int config_parse_sysv_priority(
 945                 const char *filename,
 946                 unsigned line,
 947                 const char *section,
 948                 const char *lvalue,
 949                 const char *rvalue,
 950                 void *data,
 951                 void *userdata) {
 952
 953         int *priority = data;
 954         int r, i;
 955
 956         assert(filename);
 957         assert(lvalue);
 958         assert(rvalue);
 959         assert(data);
 960
 961         if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
 962                 log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
 963                 return r;
 964         }
 965
 966         *priority = (int) i;
 967         return 0;
 968 }
 969
 970 static DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 971
 972 static int config_parse_kill_signal(
 973                 const char *filename,
 974                 unsigned line,
 975                 const char *section,
 976                 const char *lvalue,
 977                 const char *rvalue,
 978                 void *data,
 979                 void *userdata) {
 980
 981         int *sig = data;
 982         int r;
 983
 984         assert(filename);
 985         assert(lvalue);
 986         assert(rvalue);
 987         assert(sig);
 988
 989         if ((r = signal_from_string(rvalue)) <= 0)
 990                 if (startswith(rvalue, "SIG"))
 991                         r = signal_from_string(rvalue+3);
 992
 993         if (r <= 0) {
 994                 log_error("[%s:%u] Failed to parse kill signal: %s", filename, line, rvalue);
 995                 return -EINVAL;
 996         }
 997
 998         *sig = r;
 999         return 0;
1000 }
1001
1002 static int config_parse_mount_flags(
1003                 const char *filename,
1004                 unsigned line,
1005                 const char *section,
1006                 const char *lvalue,
1007                 const char *rvalue,
1008                 void *data,
1009                 void *userdata) {
1010
1011         ExecContext *c = data;
1012         char *w;
1013         size_t l;
1014         char *state;
1015         unsigned long flags = 0;
1016
1017         assert(filename);
1018         assert(lvalue);
1019         assert(rvalue);
1020         assert(data);
1021
1022         FOREACH_WORD_QUOTED(w, l, rvalue, state) {
1023                 if (strncmp(w, "shared", l) == 0)
1024                         flags |= MS_SHARED;
1025                 else if (strncmp(w, "slave", l) == 0)
1026                         flags |= MS_SLAVE;
1027                 else if (strncmp(w, "private", l) == 0)
1028                         flags |= MS_PRIVATE;
1029                 else {
1030                         log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
1031                         return -EINVAL;
1032                 }
1033         }
1034
1035         c->mount_flags = flags;
1036         return 0;
1037 }
1038
1039 static int config_parse_timer(
1040                 const char *filename,
1041                 unsigned line,
1042                 const char *section,
1043                 const char *lvalue,
1044                 const char *rvalue,
1045                 void *data,
1046                 void *userdata) {
1047
1048         Timer *t = data;
1049         usec_t u;
1050         int r;
1051         TimerValue *v;
1052         TimerBase b;
1053
1054         assert(filename);
1055         assert(lvalue);
1056         assert(rvalue);
1057         assert(data);
1058
1059         if ((b = timer_base_from_string(lvalue)) < 0) {
1060                 log_error("[%s:%u] Failed to parse timer base: %s", filename, line, lvalue);
1061                 return -EINVAL;
1062         }
1063
1064         if ((r = parse_usec(rvalue, &u)) < 0) {
1065                 log_error("[%s:%u] Failed to parse timer value: %s", filename, line, rvalue);
1066                 return r;
1067         }
1068
1069         if (!(v = new0(TimerValue, 1)))
1070                 return -ENOMEM;
1071
1072         v->base = b;
1073         v->value = u;
1074
1075         LIST_PREPEND(TimerValue, value, t->values, v);
1076
1077         return 0;
1078 }
1079
1080 static int config_parse_timer_unit(
1081                 const char *filename,
1082                 unsigned line,
1083                 const char *section,
1084                 const char *lvalue,
1085                 const char *rvalue,
1086                 void *data,
1087                 void *userdata) {
1088
1089         Timer *t = data;
1090         int r;
1091         DBusError error;
1092
1093         assert(filename);
1094         assert(lvalue);
1095         assert(rvalue);
1096         assert(data);
1097
1098         dbus_error_init(&error);
1099
1100         if (endswith(rvalue, ".timer")) {
1101                 log_error("[%s:%u] Unit cannot be of type timer: %s", filename, line, rvalue);
1102                 return -EINVAL;
1103         }
1104
1105         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, NULL, &t->unit)) < 0) {
1106                 log_error("[%s:%u] Failed to load unit %s: %s", filename, line, rvalue, bus_error(&error, r));
1107                 dbus_error_free(&error);
1108                 return r;
1109         }
1110
1111         return 0;
1112 }
1113
1114 static int config_parse_path_spec(
1115                 const char *filename,
1116                 unsigned line,
1117                 const char *section,
1118                 const char *lvalue,
1119                 const char *rvalue,
1120                 void *data,
1121                 void *userdata) {
1122
1123         Path *p = data;
1124         PathSpec *s;
1125         PathType b;
1126
1127         assert(filename);
1128         assert(lvalue);
1129         assert(rvalue);
1130         assert(data);
1131
1132         if ((b = path_type_from_string(lvalue)) < 0) {
1133                 log_error("[%s:%u] Failed to parse path type: %s", filename, line, lvalue);
1134                 return -EINVAL;
1135         }
1136
1137         if (!path_is_absolute(rvalue)) {
1138                 log_error("[%s:%u] Path is not absolute: %s", filename, line, rvalue);
1139                 return -EINVAL;
1140         }
1141
1142         if (!(s = new0(PathSpec, 1)))
1143                 return -ENOMEM;
1144
1145         if (!(s->path = strdup(rvalue))) {
1146                 free(s);
1147                 return -ENOMEM;
1148         }
1149
1150         path_kill_slashes(s->path);
1151
1152         s->type = b;
1153         s->inotify_fd = -1;
1154
1155         LIST_PREPEND(PathSpec, spec, p->specs, s);
1156
1157         return 0;
1158 }
1159
1160 static int config_parse_path_unit(
1161                 const char *filename,
1162                 unsigned line,
1163                 const char *section,
1164                 const char *lvalue,
1165                 const char *rvalue,
1166                 void *data,
1167                 void *userdata) {
1168
1169         Path *t = data;
1170         int r;
1171         DBusError error;
1172
1173         assert(filename);
1174         assert(lvalue);
1175         assert(rvalue);
1176         assert(data);
1177
1178         dbus_error_init(&error);
1179
1180         if (endswith(rvalue, ".path")) {
1181                 log_error("[%s:%u] Unit cannot be of type path: %s", filename, line, rvalue);
1182                 return -EINVAL;
1183         }
1184
1185         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &error, &t->unit)) < 0) {
1186                 log_error("[%s:%u] Failed to load unit %s: %s", filename, line, rvalue, bus_error(&error, r));
1187                 dbus_error_free(&error);
1188                 return r;
1189         }
1190
1191         return 0;
1192 }
1193
1194 static int config_parse_env_file(
1195                 const char *filename,
1196                 unsigned line,
1197                 const char *section,
1198                 const char *lvalue,
1199                 const char *rvalue,
1200                 void *data,
1201                 void *userdata) {
1202
1203         FILE *f;
1204         int r;
1205         char ***env = data;
1206
1207         assert(filename);
1208         assert(lvalue);
1209         assert(rvalue);
1210         assert(data);
1211
1212         if (!(f = fopen(rvalue, "re"))) {
1213                 log_error("[%s:%u] Failed to open environment file '%s': %m", filename, line, rvalue);
1214                 return -errno;
1215         }
1216
1217         while (!feof(f)) {
1218                 char l[LINE_MAX], *p;
1219                 char **t;
1220
1221                 if (!fgets(l, sizeof(l), f)) {
1222                         if (feof(f))
1223                                 break;
1224
1225                         r = -errno;
1226                         log_error("[%s:%u] Failed to read environment file '%s': %m", filename, line, rvalue);
1227                         goto finish;
1228                 }
1229
1230                 p = strstrip(l);
1231
1232                 if (!*p)
1233                         continue;
1234
1235                 if (strchr(COMMENTS, *p))
1236                         continue;
1237
1238                 t = strv_env_set(*env, p);
1239                 strv_free(*env);
1240                 *env = t;
1241         }
1242
1243         r = 0;
1244
1245 finish:
1246         if (f)
1247                 fclose(f);
1248
1249         return r;
1250 }
1251
1252 static int config_parse_ip_tos(
1253                 const char *filename,
1254                 unsigned line,
1255                 const char *section,
1256                 const char *lvalue,
1257                 const char *rvalue,
1258                 void *data,
1259                 void *userdata) {
1260
1261         int *ip_tos = data, x;
1262         int r;
1263
1264         assert(filename);
1265         assert(lvalue);
1266         assert(rvalue);
1267         assert(data);
1268
1269         if ((x = ip_tos_from_string(rvalue)) < 0)
1270                 if ((r = safe_atoi(rvalue, &x)) < 0) {
1271                         log_error("[%s:%u] Failed to parse IP TOS value: %s", filename, line, rvalue);
1272                         return r;
1273                 }
1274
1275         *ip_tos = x;
1276         return 0;
1277 }
1278
1279 static DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier");
1280
1281 #define FOLLOW_MAX 8
1282
1283 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
1284         unsigned c = 0;
1285         int fd, r;
1286         FILE *f;
1287         char *id = NULL;
1288
1289         assert(filename);
1290         assert(*filename);
1291         assert(_f);
1292         assert(names);
1293
1294         /* This will update the filename pointer if the loaded file is
1295          * reached by a symlink. The old string will be freed. */
1296
1297         for (;;) {
1298                 char *target, *name;
1299
1300                 if (c++ >= FOLLOW_MAX)
1301                         return -ELOOP;
1302
1303                 path_kill_slashes(*filename);
1304
1305                 /* Add the file name we are currently looking at to
1306                  * the names of this unit */
1307                 name = file_name_from_path(*filename);
1308                 if (!(id = set_get(names, name))) {
1309
1310                         if (!(id = strdup(name)))
1311                                 return -ENOMEM;
1312
1313                         if ((r = set_put(names, id)) < 0) {
1314                                 free(id);
1315                                 return r;
1316                         }
1317                 }
1318
1319                 /* Try to open the file name, but don't if its a symlink */
1320                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
1321                         break;
1322
1323                 if (errno != ELOOP)
1324                         return -errno;
1325
1326                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
1327                 if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
1328                         return r;
1329
1330                 free(*filename);
1331                 *filename = target;
1332         }
1333
1334         if (!(f = fdopen(fd, "r"))) {
1335                 r = -errno;
1336                 close_nointr_nofail(fd);
1337                 return r;
1338         }
1339
1340         *_f = f;
1341         *_final = id;
1342         return 0;
1343 }
1344
1345 static int merge_by_names(Unit **u, Set *names, const char *id) {
1346         char *k;
1347         int r;
1348
1349         assert(u);
1350         assert(*u);
1351         assert(names);
1352
1353         /* Let's try to add in all symlink names we found */
1354         while ((k = set_steal_first(names))) {
1355
1356                 /* First try to merge in the other name into our
1357                  * unit */
1358                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1359                         Unit *other;
1360
1361                         /* Hmm, we couldn't merge the other unit into
1362                          * ours? Then let's try it the other way
1363                          * round */
1364
1365                         other = manager_get_unit((*u)->meta.manager, k);
1366                         free(k);
1367
1368                         if (other)
1369                                 if ((r = unit_merge(other, *u)) >= 0) {
1370                                         *u = other;
1371                                         return merge_by_names(u, names, NULL);
1372                                 }
1373
1374                         return r;
1375                 }
1376
1377                 if (id == k)
1378                         unit_choose_id(*u, id);
1379
1380                 free(k);
1381         }
1382
1383         return 0;
1384 }
1385
1386 static void dump_items(FILE *f, const ConfigItem *items) {
1387         const ConfigItem *i;
1388         const char *prev_section = NULL;
1389         bool not_first = false;
1390
1391         struct {
1392                 ConfigParserCallback callback;
1393                 const char *rvalue;
1394         } table[] = {
1395                 { config_parse_int,              "INTEGER" },
1396                 { config_parse_unsigned,         "UNSIGNED" },
1397                 { config_parse_size,             "SIZE" },
1398                 { config_parse_bool,             "BOOLEAN" },
1399                 { config_parse_string,           "STRING" },
1400                 { config_parse_path,             "PATH" },
1401                 { config_parse_strv,             "STRING [...]" },
1402                 { config_parse_nice,             "NICE" },
1403                 { config_parse_oom_adjust,       "OOMADJUST" },
1404                 { config_parse_io_class,         "IOCLASS" },
1405                 { config_parse_io_priority,      "IOPRIORITY" },
1406                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1407                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1408                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1409                 { config_parse_mode,             "MODE" },
1410                 { config_parse_env_file,         "FILE" },
1411                 { config_parse_output,           "OUTPUT" },
1412                 { config_parse_input,            "INPUT" },
1413                 { config_parse_facility,         "FACILITY" },
1414                 { config_parse_level,            "LEVEL" },
1415                 { config_parse_capabilities,     "CAPABILITIES" },
1416                 { config_parse_secure_bits,      "SECUREBITS" },
1417                 { config_parse_bounding_set,     "BOUNDINGSET" },
1418                 { config_parse_timer_slack_nsec, "TIMERSLACK" },
1419                 { config_parse_limit,            "LIMIT" },
1420                 { config_parse_cgroup,           "CGROUP [...]" },
1421                 { config_parse_deps,             "UNIT [...]" },
1422                 { config_parse_names,            "UNIT [...]" },
1423                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1424                 { config_parse_service_type,     "SERVICETYPE" },
1425                 { config_parse_service_restart,  "SERVICERESTART" },
1426                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1427                 { config_parse_kill_mode,        "KILLMODE" },
1428                 { config_parse_kill_signal,      "SIGNAL" },
1429                 { config_parse_listen,           "SOCKET [...]" },
1430                 { config_parse_socket_bind,      "SOCKETBIND" },
1431                 { config_parse_bindtodevice,     "NETWORKINTERFACE" },
1432                 { config_parse_usec,             "SECONDS" },
1433                 { config_parse_path_strv,        "PATH [...]" },
1434                 { config_parse_mount_flags,      "MOUNTFLAG [...]" },
1435                 { config_parse_string_printf,    "STRING" },
1436                 { config_parse_timer,            "TIMER" },
1437                 { config_parse_timer_unit,       "NAME" },
1438                 { config_parse_path_spec,        "PATH" },
1439                 { config_parse_path_unit,        "UNIT" },
1440                 { config_parse_notify_access,    "ACCESS" },
1441                 { config_parse_ip_tos,           "TOS" },
1442         };
1443
1444         assert(f);
1445         assert(items);
1446
1447         for (i = items; i->lvalue; i++) {
1448                 unsigned j;
1449                 const char *rvalue = "OTHER";
1450
1451                 if (!streq_ptr(i->section, prev_section)) {
1452                         if (!not_first)
1453                                 not_first = true;
1454                         else
1455                                 fputc('\n', f);
1456
1457                         fprintf(f, "[%s]\n", i->section);
1458                         prev_section = i->section;
1459                 }
1460
1461                 for (j = 0; j < ELEMENTSOF(table); j++)
1462                         if (i->parse == table[j].callback) {
1463                                 rvalue = table[j].rvalue;
1464                                 break;
1465                         }
1466
1467                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1468         }
1469 }
1470
1471 static int load_from_path(Unit *u, const char *path) {
1472
1473         static const char* const section_table[_UNIT_TYPE_MAX] = {
1474                 [UNIT_SERVICE]   = "Service",
1475                 [UNIT_TIMER]     = "Timer",
1476                 [UNIT_SOCKET]    = "Socket",
1477                 [UNIT_TARGET]    = "Target",
1478                 [UNIT_DEVICE]    = "Device",
1479                 [UNIT_MOUNT]     = "Mount",
1480                 [UNIT_AUTOMOUNT] = "Automount",
1481                 [UNIT_SNAPSHOT]  = "Snapshot",
1482                 [UNIT_SWAP]      = "Swap",
1483                 [UNIT_PATH]      = "Path"
1484         };
1485
1486 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1487                 { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
1488                 { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
1489                 { "User",                   config_parse_string_printf,   &(context).user,                                 section   }, \
1490                 { "Group",                  config_parse_string_printf,   &(context).group,                                section   }, \
1491                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
1492                 { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
1493                 { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
1494                 { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
1495                 { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
1496                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
1497                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
1498                 { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
1499                 { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
1500                 { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
1501                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
1502                 { "EnvironmentFile",        config_parse_env_file,        &(context).environment,                          section   }, \
1503                 { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
1504                 { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
1505                 { "StandardError",          config_parse_output,          &(context).std_error,                            section   }, \
1506                 { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
1507                 { "SyslogIdentifier",       config_parse_string_printf,   &(context).syslog_identifier,                    section   }, \
1508                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
1509                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
1510                 { "SyslogLevelPrefix",      config_parse_bool,            &(context).syslog_level_prefix,                  section   }, \
1511                 { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
1512                 { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
1513                 { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
1514                 { "TimerSlackNSec",         config_parse_timer_slack_nsec,&(context),                                      section   }, \
1515                 { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
1516                 { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1517                 { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
1518                 { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
1519                 { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
1520                 { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
1521                 { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1522                 { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
1523                 { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1524                 { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1525                 { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1526                 { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1527                 { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1528                 { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
1529                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1530                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1531                 { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
1532                 { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
1533                 { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
1534                 { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
1535                 { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
1536                 { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }, \
1537                 { "TCPWrapName",            config_parse_string_printf,   &(context).tcpwrap_name,                         section   }, \
1538                 { "PAMName",                config_parse_string_printf,   &(context).pam_name,                             section   }, \
1539                 { "KillMode",               config_parse_kill_mode,       &(context).kill_mode,                            section   }, \
1540                 { "KillSignal",             config_parse_kill_signal,     &(context).kill_signal,                          section   }
1541
1542         const ConfigItem items[] = {
1543                 { "Names",                  config_parse_names,           u,                                               "Unit"    },
1544                 { "Description",            config_parse_string_printf,   &u->meta.description,                            "Unit"    },
1545                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1546                 { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1547                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1548                 { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1549                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1550                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1551                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1552                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1553                 { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
1554                 { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
1555                 { "OnlyByDependency",       config_parse_bool,            &u->meta.only_by_dependency,                     "Unit"    },
1556                 { "DefaultDependencies",    config_parse_bool,            &u->meta.default_dependencies,                   "Unit"    },
1557
1558                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
1559                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1560                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1561                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1562                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1563                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1564                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1565                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
1566                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
1567                 { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
1568                 { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
1569                 { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
1570                 { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
1571                 { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
1572                 { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
1573                 { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
1574                 { "BusName",                config_parse_string_printf,   &u->service.bus_name,                            "Service" },
1575                 { "NotifyAccess",           config_parse_notify_access,   &u->service.notify_access,                       "Service" },
1576                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1577
1578                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
1579                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
1580                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
1581                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
1582                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
1583                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
1584                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
1585                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
1586                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
1587                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
1588                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
1589                 { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
1590                 { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
1591                 { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
1592                 { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
1593                 { "MaxConnections",         config_parse_unsigned,        &u->socket.max_connections,                      "Socket"  },
1594                 { "KeepAlive",              config_parse_bool,            &u->socket.keep_alive,                           "Socket"  },
1595                 { "Priority",               config_parse_int,             &u->socket.priority,                             "Socket"  },
1596                 { "ReceiveBuffer",          config_parse_size,            &u->socket.receive_buffer,                       "Socket"  },
1597                 { "SendBuffer",             config_parse_size,            &u->socket.send_buffer,                          "Socket"  },
1598                 { "IPTOS",                  config_parse_ip_tos,          &u->socket.ip_tos,                               "Socket"  },
1599                 { "IPTTL",                  config_parse_int,             &u->socket.ip_ttl,                               "Socket"  },
1600                 { "Mark",                   config_parse_int,             &u->socket.mark,                                 "Socket"  },
1601                 { "PipeSize",               config_parse_size,            &u->socket.pipe_size,                            "Socket"  },
1602                 { "FreeBind",               config_parse_bool,            &u->socket.free_bind,                            "Socket"  },
1603                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
1604
1605                 { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
1606                 { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
1607                 { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
1608                 { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
1609                 { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
1610                 { "DirectoryMode",          config_parse_mode,            &u->mount.directory_mode,                        "Mount"   },
1611                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
1612
1613                 { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
1614                 { "DirectoryMode",          config_parse_mode,            &u->automount.directory_mode,                    "Automount" },
1615
1616                 { "What",                   config_parse_path,            &u->swap.parameters_fragment.what,               "Swap"    },
1617                 { "Priority",               config_parse_int,             &u->swap.parameters_fragment.priority,           "Swap"    },
1618
1619                 { "OnActiveSec",            config_parse_timer,           &u->timer,                                       "Timer"   },
1620                 { "OnBootSec",              config_parse_timer,           &u->timer,                                       "Timer"   },
1621                 { "OnStartupSec",           config_parse_timer,           &u->timer,                                       "Timer"   },
1622                 { "OnUnitActiveSec",        config_parse_timer,           &u->timer,                                       "Timer"   },
1623                 { "OnUnitInactiveSec",      config_parse_timer,           &u->timer,                                       "Timer"   },
1624                 { "Unit",                   config_parse_timer_unit,      &u->timer,                                       "Timer"   },
1625
1626                 { "PathExists",             config_parse_path_spec,       &u->path,                                        "Path"    },
1627                 { "PathChanged",            config_parse_path_spec,       &u->path,                                        "Path"    },
1628                 { "DirectoryNotEmpty",      config_parse_path_spec,       &u->path,                                        "Path"    },
1629                 { "Unit",                   config_parse_path_unit,       &u->path,                                        "Path"    },
1630
1631                 /* The [Install] section is ignored here. */
1632                 { "Alias",                  NULL,                         NULL,                                            "Install" },
1633                 { "WantedBy",               NULL,                         NULL,                                            "Install" },
1634                 { "Also",                   NULL,                         NULL,                                            "Install" },
1635
1636                 { NULL, NULL, NULL, NULL }
1637         };
1638
1639 #undef EXEC_CONTEXT_CONFIG_ITEMS
1640
1641         const char *sections[4];
1642         int r;
1643         Set *symlink_names;
1644         FILE *f = NULL;
1645         char *filename = NULL, *id = NULL;
1646         Unit *merged;
1647
1648         if (!u) {
1649                 /* Dirty dirty hack. */
1650                 dump_items((FILE*) path, items);
1651                 return 0;
1652         }
1653
1654         assert(u);
1655         assert(path);
1656
1657         sections[0] = "Unit";
1658         sections[1] = section_table[u->meta.type];
1659         sections[2] = "Install";
1660         sections[3] = NULL;
1661
1662         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
1663                 return -ENOMEM;
1664
1665         if (path_is_absolute(path)) {
1666
1667                 if (!(filename = strdup(path))) {
1668                         r = -ENOMEM;
1669                         goto finish;
1670                 }
1671
1672                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1673                         free(filename);
1674                         filename = NULL;
1675
1676                         if (r != -ENOENT)
1677                                 goto finish;
1678                 }
1679
1680         } else  {
1681                 char **p;
1682
1683                 STRV_FOREACH(p, u->meta.manager->lookup_paths.unit_path) {
1684
1685                         /* Instead of opening the path right away, we manually
1686                          * follow all symlinks and add their name to our unit
1687                          * name set while doing so */
1688                         if (!(filename = path_make_absolute(path, *p))) {
1689                                 r = -ENOMEM;
1690                                 goto finish;
1691                         }
1692
1693                         if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1694                                 char *sn;
1695
1696                                 free(filename);
1697                                 filename = NULL;
1698
1699                                 if (r != -ENOENT)
1700                                         goto finish;
1701
1702                                 /* Empty the symlink names for the next run */
1703                                 while ((sn = set_steal_first(symlink_names)))
1704                                         free(sn);
1705
1706                                 continue;
1707                         }
1708
1709                         break;
1710                 }
1711         }
1712
1713         if (!filename) {
1714                 r = 0;
1715                 goto finish;
1716         }
1717
1718         merged = u;
1719         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
1720                 goto finish;
1721
1722         if (merged != u) {
1723                 u->meta.load_state = UNIT_MERGED;
1724                 r = 0;
1725                 goto finish;
1726         }
1727
1728         /* Now, parse the file contents */
1729         if ((r = config_parse(filename, f, sections, items, false, u)) < 0)
1730                 goto finish;
1731
1732         free(u->meta.fragment_path);
1733         u->meta.fragment_path = filename;
1734         filename = NULL;
1735
1736         u->meta.load_state = UNIT_LOADED;
1737         r = 0;
1738
1739 finish:
1740         set_free_free(symlink_names);
1741         free(filename);
1742
1743         if (f)
1744                 fclose(f);
1745
1746         return r;
1747 }
1748
1749 int unit_load_fragment(Unit *u) {
1750         int r;
1751
1752         assert(u);
1753
1754         if (u->meta.fragment_path) {
1755
1756                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
1757                         return r;
1758
1759         } else {
1760                 Iterator i;
1761                 const char *t;
1762
1763                 /* Try to find the unit under its id */
1764                 if ((r = load_from_path(u, u->meta.id)) < 0)
1765                         return r;
1766
1767                 /* Try to find an alias we can load this with */
1768                 if (u->meta.load_state == UNIT_STUB)
1769                         SET_FOREACH(t, u->meta.names, i) {
1770
1771                                 if (t == u->meta.id)
1772                                         continue;
1773
1774                                 if ((r = load_from_path(u, t)) < 0)
1775                                         return r;
1776
1777                                 if (u->meta.load_state != UNIT_STUB)
1778                                         break;
1779                         }
1780
1781                 /* Now, follow the same logic, but look for a template */
1782                 if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
1783                         char *k;
1784
1785                         if (!(k = unit_name_template(u->meta.id)))
1786                                 return -ENOMEM;
1787
1788                         r = load_from_path(u, k);
1789                         free(k);
1790
1791                         if (r < 0)
1792                                 return r;
1793
1794                         if (u->meta.load_state == UNIT_STUB)
1795                                 SET_FOREACH(t, u->meta.names, i) {
1796
1797                                         if (t == u->meta.id)
1798                                                 continue;
1799
1800                                         if (!(k = unit_name_template(t)))
1801                                                 return -ENOMEM;
1802
1803                                         r = load_from_path(u, k);
1804                                         free(k);
1805
1806                                         if (r < 0)
1807                                                 return r;
1808
1809                                         if (u->meta.load_state != UNIT_STUB)
1810                                                 break;
1811                                 }
1812                 }
1813         }
1814
1815         return 0;
1816 }
1817
1818 void unit_dump_config_items(FILE *f) {
1819         /* OK, this wins a prize for extreme ugliness. */
1820
1821         load_from_path(NULL, (const void*) f);
1822 }