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