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                 r = safe_atou(t, &cpu);
 729                 free(t);
 730
 731                 if (r < 0 || cpu >= CPU_SETSIZE) {
 732                         log_error("[%s:%u] Failed to parse CPU affinity: %s", filename, line, rvalue);
 733                         return -EBADMSG;
 734                 }
 735
 736                 CPU_SET(cpu, &c->cpu_affinity);
 737         }
 738
 739         c->cpu_affinity_set = true;
 740
 741         return 0;
 742 }
 743
 744 static int config_parse_capabilities(
 745                 const char *filename,
 746                 unsigned line,
 747                 const char *section,
 748                 const char *lvalue,
 749                 const char *rvalue,
 750                 void *data,
 751                 void *userdata) {
 752
 753         ExecContext *c = data;
 754         cap_t cap;
 755
 756         assert(filename);
 757         assert(lvalue);
 758         assert(rvalue);
 759         assert(data);
 760
 761         if (!(cap = cap_from_text(rvalue))) {
 762                 if (errno == ENOMEM)
 763                         return -ENOMEM;
 764
 765                 log_error("[%s:%u] Failed to parse capabilities: %s", filename, line, rvalue);
 766                 return -EBADMSG;
 767         }
 768
 769         if (c->capabilities)
 770                 cap_free(c->capabilities);
 771         c->capabilities = cap;
 772
 773         return 0;
 774 }
 775
 776 static int config_parse_secure_bits(
 777                 const char *filename,
 778                 unsigned line,
 779                 const char *section,
 780                 const char *lvalue,
 781                 const char *rvalue,
 782                 void *data,
 783                 void *userdata) {
 784
 785         ExecContext *c = data;
 786         char *w;
 787         size_t l;
 788         char *state;
 789
 790         assert(filename);
 791         assert(lvalue);
 792         assert(rvalue);
 793         assert(data);
 794
 795         FOREACH_WORD(w, l, rvalue, state) {
 796                 if (first_word(w, "keep-caps"))
 797                         c->secure_bits |= SECURE_KEEP_CAPS;
 798                 else if (first_word(w, "keep-caps-locked"))
 799                         c->secure_bits |= SECURE_KEEP_CAPS_LOCKED;
 800                 else if (first_word(w, "no-setuid-fixup"))
 801                         c->secure_bits |= SECURE_NO_SETUID_FIXUP;
 802                 else if (first_word(w, "no-setuid-fixup-locked"))
 803                         c->secure_bits |= SECURE_NO_SETUID_FIXUP_LOCKED;
 804                 else if (first_word(w, "noroot"))
 805                         c->secure_bits |= SECURE_NOROOT;
 806                 else if (first_word(w, "noroot-locked"))
 807                         c->secure_bits |= SECURE_NOROOT_LOCKED;
 808                 else {
 809                         log_error("[%s:%u] Failed to parse secure bits: %s", filename, line, rvalue);
 810                         return -EBADMSG;
 811                 }
 812         }
 813
 814         return 0;
 815 }
 816
 817 static int config_parse_bounding_set(
 818                 const char *filename,
 819                 unsigned line,
 820                 const char *section,
 821                 const char *lvalue,
 822                 const char *rvalue,
 823                 void *data,
 824                 void *userdata) {
 825
 826         ExecContext *c = data;
 827         char *w;
 828         size_t l;
 829         char *state;
 830
 831         assert(filename);
 832         assert(lvalue);
 833         assert(rvalue);
 834         assert(data);
 835
 836         FOREACH_WORD(w, l, rvalue, state) {
 837                 char *t;
 838                 int r;
 839                 cap_value_t cap;
 840
 841                 if (!(t = strndup(w, l)))
 842                         return -ENOMEM;
 843
 844                 r = cap_from_name(t, &cap);
 845                 free(t);
 846
 847                 if (r < 0) {
 848                         log_error("[%s:%u] Failed to parse capability bounding set: %s", filename, line, rvalue);
 849                         return -EBADMSG;
 850                 }
 851
 852                 c->capability_bounding_set_drop |= 1 << cap;
 853         }
 854
 855         return 0;
 856 }
 857
 858 static int config_parse_timer_slack_ns(
 859                 const char *filename,
 860                 unsigned line,
 861                 const char *section,
 862                 const char *lvalue,
 863                 const char *rvalue,
 864                 void *data,
 865                 void *userdata) {
 866
 867         ExecContext *c = data;
 868         unsigned long u;
 869         int r;
 870
 871         assert(filename);
 872         assert(lvalue);
 873         assert(rvalue);
 874         assert(data);
 875
 876         if ((r = safe_atolu(rvalue, &u)) < 0) {
 877                 log_error("[%s:%u] Failed to parse time slack value: %s", filename, line, rvalue);
 878                 return r;
 879         }
 880
 881         c->timer_slack_ns = u;
 882
 883         return 0;
 884 }
 885
 886 static int config_parse_limit(
 887                 const char *filename,
 888                 unsigned line,
 889                 const char *section,
 890                 const char *lvalue,
 891                 const char *rvalue,
 892                 void *data,
 893                 void *userdata) {
 894
 895         struct rlimit **rl = data;
 896         unsigned long long u;
 897         int r;
 898
 899         assert(filename);
 900         assert(lvalue);
 901         assert(rvalue);
 902         assert(data);
 903
 904         if ((r = safe_atollu(rvalue, &u)) < 0) {
 905                 log_error("[%s:%u] Failed to parse resource value: %s", filename, line, rvalue);
 906                 return r;
 907         }
 908
 909         if (!*rl)
 910                 if (!(*rl = new(struct rlimit, 1)))
 911                         return -ENOMEM;
 912
 913         (*rl)->rlim_cur = (*rl)->rlim_max = (rlim_t) u;
 914         return 0;
 915 }
 916
 917 static int config_parse_cgroup(
 918                 const char *filename,
 919                 unsigned line,
 920                 const char *section,
 921                 const char *lvalue,
 922                 const char *rvalue,
 923                 void *data,
 924                 void *userdata) {
 925
 926         Unit *u = userdata;
 927         char *w;
 928         size_t l;
 929         char *state;
 930
 931         FOREACH_WORD(w, l, rvalue, state) {
 932                 char *t;
 933                 int r;
 934
 935                 if (!(t = strndup(w, l)))
 936                         return -ENOMEM;
 937
 938                 r = unit_add_cgroup_from_text(u, t);
 939                 free(t);
 940
 941                 if (r < 0)
 942                         return r;
 943         }
 944
 945         return 0;
 946 }
 947
 948 static int config_parse_sysv_priority(
 949                 const char *filename,
 950                 unsigned line,
 951                 const char *section,
 952                 const char *lvalue,
 953                 const char *rvalue,
 954                 void *data,
 955                 void *userdata) {
 956
 957         int *priority = data;
 958         int r, i;
 959
 960         assert(filename);
 961         assert(lvalue);
 962         assert(rvalue);
 963         assert(data);
 964
 965         if ((r = safe_atoi(rvalue, &i)) < 0 || i < 0) {
 966                 log_error("[%s:%u] Failed to parse SysV start priority: %s", filename, line, rvalue);
 967                 return r;
 968         }
 969
 970         *priority = (int) i;
 971         return 0;
 972 }
 973
 974 DEFINE_CONFIG_PARSE_ENUM(config_parse_kill_mode, kill_mode, KillMode, "Failed to parse kill mode");
 975
 976 static int config_parse_mount_flags(
 977                 const char *filename,
 978                 unsigned line,
 979                 const char *section,
 980                 const char *lvalue,
 981                 const char *rvalue,
 982                 void *data,
 983                 void *userdata) {
 984
 985         ExecContext *c = data;
 986         char *w;
 987         size_t l;
 988         char *state;
 989         unsigned long flags = 0;
 990
 991         assert(filename);
 992         assert(lvalue);
 993         assert(rvalue);
 994         assert(data);
 995
 996         FOREACH_WORD(w, l, rvalue, state) {
 997                 if (strncmp(w, "shared", l) == 0)
 998                         flags |= MS_SHARED;
 999                 else if (strncmp(w, "slave", l) == 0)
1000                         flags |= MS_SLAVE;
1001                 else if (strncmp(w, "private", l) == 0)
1002                         flags |= MS_PRIVATE;
1003                 else {
1004                         log_error("[%s:%u] Failed to parse mount flags: %s", filename, line, rvalue);
1005                         return -EINVAL;
1006                 }
1007         }
1008
1009         c->mount_flags = flags;
1010         return 0;
1011 }
1012
1013 static int config_parse_timer(
1014                 const char *filename,
1015                 unsigned line,
1016                 const char *section,
1017                 const char *lvalue,
1018                 const char *rvalue,
1019                 void *data,
1020                 void *userdata) {
1021
1022         Timer *t = data;
1023         usec_t u;
1024         int r;
1025         TimerValue *v;
1026         TimerBase b;
1027
1028         assert(filename);
1029         assert(lvalue);
1030         assert(rvalue);
1031         assert(data);
1032
1033         if ((b = timer_base_from_string(lvalue)) < 0) {
1034                 log_error("[%s:%u] Failed to parse timer base: %s", filename, line, lvalue);
1035                 return -EINVAL;
1036         }
1037
1038         if ((r = parse_usec(rvalue, &u)) < 0) {
1039                 log_error("[%s:%u] Failed to parse timer value: %s", filename, line, rvalue);
1040                 return r;
1041         }
1042
1043         if (!(v = new0(TimerValue, 1)))
1044                 return -ENOMEM;
1045
1046         v->base = b;
1047         v->value = u;
1048
1049         LIST_PREPEND(TimerValue, value, t->values, v);
1050
1051         return 0;
1052 }
1053
1054 static int config_parse_timer_unit(
1055                 const char *filename,
1056                 unsigned line,
1057                 const char *section,
1058                 const char *lvalue,
1059                 const char *rvalue,
1060                 void *data,
1061                 void *userdata) {
1062
1063         Timer *t = data;
1064         int r;
1065
1066         if (endswith(rvalue, ".timer")) {
1067                 log_error("[%s:%u] Unit cannot be of type timer: %s", filename, line, rvalue);
1068                 return -EINVAL;
1069         }
1070
1071         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &t->unit)) < 0) {
1072                 log_error("[%s:%u] Failed to load unit: %s", filename, line, rvalue);
1073                 return r;
1074         }
1075
1076         return 0;
1077 }
1078
1079 static int config_parse_path_spec(
1080                 const char *filename,
1081                 unsigned line,
1082                 const char *section,
1083                 const char *lvalue,
1084                 const char *rvalue,
1085                 void *data,
1086                 void *userdata) {
1087
1088         Path *p = data;
1089         PathSpec *s;
1090         PathType b;
1091
1092         assert(filename);
1093         assert(lvalue);
1094         assert(rvalue);
1095         assert(data);
1096
1097         if ((b = path_type_from_string(lvalue)) < 0) {
1098                 log_error("[%s:%u] Failed to parse path type: %s", filename, line, lvalue);
1099                 return -EINVAL;
1100         }
1101
1102         if (!path_is_absolute(rvalue)) {
1103                 log_error("[%s:%u] Path is not absolute: %s", filename, line, rvalue);
1104                 return -EINVAL;
1105         }
1106
1107         if (!(s = new0(PathSpec, 1)))
1108                 return -ENOMEM;
1109
1110         if (!(s->path = strdup(rvalue))) {
1111                 free(s);
1112                 return -ENOMEM;
1113         }
1114
1115         path_kill_slashes(s->path);
1116
1117         s->type = b;
1118         s->inotify_fd = -1;
1119
1120         LIST_PREPEND(PathSpec, spec, p->specs, s);
1121
1122         return 0;
1123 }
1124
1125 static int config_parse_path_unit(
1126                 const char *filename,
1127                 unsigned line,
1128                 const char *section,
1129                 const char *lvalue,
1130                 const char *rvalue,
1131                 void *data,
1132                 void *userdata) {
1133
1134         Path *t = data;
1135         int r;
1136
1137         if (endswith(rvalue, ".path")) {
1138                 log_error("[%s:%u] Unit cannot be of type path: %s", filename, line, rvalue);
1139                 return -EINVAL;
1140         }
1141
1142         if ((r = manager_load_unit(t->meta.manager, rvalue, NULL, &t->unit)) < 0) {
1143                 log_error("[%s:%u] Failed to load unit: %s", filename, line, rvalue);
1144                 return r;
1145         }
1146
1147         return 0;
1148 }
1149
1150 static int config_parse_env_file(
1151                 const char *filename,
1152                 unsigned line,
1153                 const char *section,
1154                 const char *lvalue,
1155                 const char *rvalue,
1156                 void *data,
1157                 void *userdata) {
1158
1159         FILE *f;
1160         int r;
1161         char ***env = data;
1162
1163         assert(filename);
1164         assert(lvalue);
1165         assert(rvalue);
1166         assert(data);
1167
1168         if (!(f = fopen(rvalue, "re"))) {
1169                 log_error("[%s:%u] Failed to open environment file '%s': %m", filename, line, rvalue);
1170                 return -errno;
1171         }
1172
1173         while (!feof(f)) {
1174                 char l[LINE_MAX], *p;
1175                 char **t;
1176
1177                 if (!fgets(l, sizeof(l), f)) {
1178                         if (feof(f))
1179                                 break;
1180
1181                         r = -errno;
1182                         log_error("[%s:%u] Failed to read environment file '%s': %m", filename, line, rvalue);
1183                         goto finish;
1184                 }
1185
1186                 p = strstrip(l);
1187
1188                 if (!*p)
1189                         continue;
1190
1191                 if (strchr(COMMENTS, *p))
1192                         continue;
1193
1194                 t = strv_env_set(*env, p);
1195                 strv_free(*env);
1196                 *env = t;
1197         }
1198
1199         r = 0;
1200
1201 finish:
1202         if (f)
1203                 fclose(f);
1204
1205         return r;
1206 }
1207
1208 static int config_parse_ip_tos(
1209                 const char *filename,
1210                 unsigned line,
1211                 const char *section,
1212                 const char *lvalue,
1213                 const char *rvalue,
1214                 void *data,
1215                 void *userdata) {
1216
1217         int *ip_tos = data, x;
1218         int r;
1219
1220         assert(filename);
1221         assert(lvalue);
1222         assert(rvalue);
1223         assert(data);
1224
1225         if ((x = ip_tos_from_string(rvalue)) < 0)
1226                 if ((r = safe_atoi(rvalue, &x)) < 0) {
1227                         log_error("[%s:%u] Failed to parse IP TOS value: %s", filename, line, rvalue);
1228                         return r;
1229                 }
1230
1231         *ip_tos = x;
1232         return 0;
1233 }
1234
1235 DEFINE_CONFIG_PARSE_ENUM(config_parse_notify_access, notify_access, NotifyAccess, "Failed to parse notify access specifier");
1236
1237 #define FOLLOW_MAX 8
1238
1239 static int open_follow(char **filename, FILE **_f, Set *names, char **_final) {
1240         unsigned c = 0;
1241         int fd, r;
1242         FILE *f;
1243         char *id = NULL;
1244
1245         assert(filename);
1246         assert(*filename);
1247         assert(_f);
1248         assert(names);
1249
1250         /* This will update the filename pointer if the loaded file is
1251          * reached by a symlink. The old string will be freed. */
1252
1253         for (;;) {
1254                 char *target, *name;
1255
1256                 if (c++ >= FOLLOW_MAX)
1257                         return -ELOOP;
1258
1259                 path_kill_slashes(*filename);
1260
1261                 /* Add the file name we are currently looking at to
1262                  * the names of this unit */
1263                 name = file_name_from_path(*filename);
1264                 if (!(id = set_get(names, name))) {
1265
1266                         if (!(id = strdup(name)))
1267                                 return -ENOMEM;
1268
1269                         if ((r = set_put(names, id)) < 0) {
1270                                 free(id);
1271                                 return r;
1272                         }
1273                 }
1274
1275                 /* Try to open the file name, but don't if its a symlink */
1276                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
1277                         break;
1278
1279                 if (errno != ELOOP)
1280                         return -errno;
1281
1282                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
1283                 if ((r = readlink_and_make_absolute(*filename, &target)) < 0)
1284                         return r;
1285
1286                 free(*filename);
1287                 *filename = target;
1288         }
1289
1290         if (!(f = fdopen(fd, "r"))) {
1291                 r = -errno;
1292                 close_nointr_nofail(fd);
1293                 return r;
1294         }
1295
1296         *_f = f;
1297         *_final = id;
1298         return 0;
1299 }
1300
1301 static int merge_by_names(Unit **u, Set *names, const char *id) {
1302         char *k;
1303         int r;
1304
1305         assert(u);
1306         assert(*u);
1307         assert(names);
1308
1309         /* Let's try to add in all symlink names we found */
1310         while ((k = set_steal_first(names))) {
1311
1312                 /* First try to merge in the other name into our
1313                  * unit */
1314                 if ((r = unit_merge_by_name(*u, k)) < 0) {
1315                         Unit *other;
1316
1317                         /* Hmm, we couldn't merge the other unit into
1318                          * ours? Then let's try it the other way
1319                          * round */
1320
1321                         other = manager_get_unit((*u)->meta.manager, k);
1322                         free(k);
1323
1324                         if (other)
1325                                 if ((r = unit_merge(other, *u)) >= 0) {
1326                                         *u = other;
1327                                         return merge_by_names(u, names, NULL);
1328                                 }
1329
1330                         return r;
1331                 }
1332
1333                 if (id == k)
1334                         unit_choose_id(*u, id);
1335
1336                 free(k);
1337         }
1338
1339         return 0;
1340 }
1341
1342 static void dump_items(FILE *f, const ConfigItem *items) {
1343         const ConfigItem *i;
1344         const char *prev_section = NULL;
1345         bool not_first = false;
1346
1347         struct {
1348                 ConfigParserCallback callback;
1349                 const char *rvalue;
1350         } table[] = {
1351                 { config_parse_int,              "INTEGER" },
1352                 { config_parse_unsigned,         "UNSIGNED" },
1353                 { config_parse_size,             "SIZE" },
1354                 { config_parse_bool,             "BOOLEAN" },
1355                 { config_parse_string,           "STRING" },
1356                 { config_parse_path,             "PATH" },
1357                 { config_parse_strv,             "STRING [...]" },
1358                 { config_parse_nice,             "NICE" },
1359                 { config_parse_oom_adjust,       "OOMADJUST" },
1360                 { config_parse_io_class,         "IOCLASS" },
1361                 { config_parse_io_priority,      "IOPRIORITY" },
1362                 { config_parse_cpu_sched_policy, "CPUSCHEDPOLICY" },
1363                 { config_parse_cpu_sched_prio,   "CPUSCHEDPRIO" },
1364                 { config_parse_cpu_affinity,     "CPUAFFINITY" },
1365                 { config_parse_mode,             "MODE" },
1366                 { config_parse_env_file,         "FILE" },
1367                 { config_parse_output,           "OUTPUT" },
1368                 { config_parse_input,            "INPUT" },
1369                 { config_parse_facility,         "FACILITY" },
1370                 { config_parse_level,            "LEVEL" },
1371                 { config_parse_capabilities,     "CAPABILITIES" },
1372                 { config_parse_secure_bits,      "SECUREBITS" },
1373                 { config_parse_bounding_set,     "BOUNDINGSET" },
1374                 { config_parse_timer_slack_ns,   "TIMERSLACK" },
1375                 { config_parse_limit,            "LIMIT" },
1376                 { config_parse_cgroup,           "CGROUP [...]" },
1377                 { config_parse_deps,             "UNIT [...]" },
1378                 { config_parse_names,            "UNIT [...]" },
1379                 { config_parse_exec,             "PATH [ARGUMENT [...]]" },
1380                 { config_parse_service_type,     "SERVICETYPE" },
1381                 { config_parse_service_restart,  "SERVICERESTART" },
1382                 { config_parse_sysv_priority,    "SYSVPRIORITY" },
1383                 { config_parse_kill_mode,        "KILLMODE" },
1384                 { config_parse_listen,           "SOCKET [...]" },
1385                 { config_parse_socket_bind,      "SOCKETBIND" },
1386                 { config_parse_bindtodevice,     "NETWORKINTERFACE" },
1387                 { config_parse_usec,             "SECONDS" },
1388                 { config_parse_path_strv,        "PATH [...]" },
1389                 { config_parse_mount_flags,      "MOUNTFLAG [...]" },
1390                 { config_parse_string_printf,    "STRING" },
1391                 { config_parse_timer,            "TIMER" },
1392                 { config_parse_timer_unit,       "NAME" },
1393                 { config_parse_path_spec,        "PATH" },
1394                 { config_parse_path_unit,        "UNIT" },
1395                 { config_parse_notify_access,    "ACCESS" },
1396                 { config_parse_ip_tos,           "TOS" },
1397         };
1398
1399         assert(f);
1400         assert(items);
1401
1402         for (i = items; i->lvalue; i++) {
1403                 unsigned j;
1404                 const char *rvalue = "OTHER";
1405
1406                 if (!streq_ptr(i->section, prev_section)) {
1407                         if (!not_first)
1408                                 not_first = true;
1409                         else
1410                                 fputc('\n', f);
1411
1412                         fprintf(f, "[%s]\n", i->section);
1413                         prev_section = i->section;
1414                 }
1415
1416                 for (j = 0; j < ELEMENTSOF(table); j++)
1417                         if (i->parse == table[j].callback) {
1418                                 rvalue = table[j].rvalue;
1419                                 break;
1420                         }
1421
1422                 fprintf(f, "%s=%s\n", i->lvalue, rvalue);
1423         }
1424 }
1425
1426 static int load_from_path(Unit *u, const char *path) {
1427
1428         static const char* const section_table[_UNIT_TYPE_MAX] = {
1429                 [UNIT_SERVICE]   = "Service",
1430                 [UNIT_TIMER]     = "Timer",
1431                 [UNIT_SOCKET]    = "Socket",
1432                 [UNIT_TARGET]    = "Target",
1433                 [UNIT_DEVICE]    = "Device",
1434                 [UNIT_MOUNT]     = "Mount",
1435                 [UNIT_AUTOMOUNT] = "Automount",
1436                 [UNIT_SNAPSHOT]  = "Snapshot",
1437                 [UNIT_SWAP]      = "Swap",
1438                 [UNIT_PATH]      = "Path"
1439         };
1440
1441 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
1442                 { "WorkingDirectory",       config_parse_path,            &(context).working_directory,                    section   }, \
1443                 { "RootDirectory",          config_parse_path,            &(context).root_directory,                       section   }, \
1444                 { "User",                   config_parse_string_printf,   &(context).user,                                 section   }, \
1445                 { "Group",                  config_parse_string_printf,   &(context).group,                                section   }, \
1446                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
1447                 { "Nice",                   config_parse_nice,            &(context),                                      section   }, \
1448                 { "OOMAdjust",              config_parse_oom_adjust,      &(context),                                      section   }, \
1449                 { "IOSchedulingClass",      config_parse_io_class,        &(context),                                      section   }, \
1450                 { "IOSchedulingPriority",   config_parse_io_priority,     &(context),                                      section   }, \
1451                 { "CPUSchedulingPolicy",    config_parse_cpu_sched_policy,&(context),                                      section   }, \
1452                 { "CPUSchedulingPriority",  config_parse_cpu_sched_prio,  &(context),                                      section   }, \
1453                 { "CPUSchedulingResetOnFork", config_parse_bool,          &(context).cpu_sched_reset_on_fork,              section   }, \
1454                 { "CPUAffinity",            config_parse_cpu_affinity,    &(context),                                      section   }, \
1455                 { "UMask",                  config_parse_mode,            &(context).umask,                                section   }, \
1456                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
1457                 { "EnvironmentFile",        config_parse_env_file,        &(context).environment,                          section   }, \
1458                 { "StandardInput",          config_parse_input,           &(context).std_input,                            section   }, \
1459                 { "StandardOutput",         config_parse_output,          &(context).std_output,                           section   }, \
1460                 { "StandardError",          config_parse_output,          &(context).std_error,                            section   }, \
1461                 { "TTYPath",                config_parse_path,            &(context).tty_path,                             section   }, \
1462                 { "SyslogIdentifier",       config_parse_string_printf,   &(context).syslog_identifier,                    section   }, \
1463                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
1464                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }, \
1465                 { "SyslogNoPrefix",         config_parse_bool,            &(context).syslog_no_prefix,                     section   }, \
1466                 { "Capabilities",           config_parse_capabilities,    &(context),                                      section   }, \
1467                 { "SecureBits",             config_parse_secure_bits,     &(context),                                      section   }, \
1468                 { "CapabilityBoundingSetDrop", config_parse_bounding_set, &(context),                                      section   }, \
1469                 { "TimerSlackNS",           config_parse_timer_slack_ns,  &(context),                                      section   }, \
1470                 { "LimitCPU",               config_parse_limit,           &(context).rlimit[RLIMIT_CPU],                   section   }, \
1471                 { "LimitFSIZE",             config_parse_limit,           &(context).rlimit[RLIMIT_FSIZE],                 section   }, \
1472                 { "LimitDATA",              config_parse_limit,           &(context).rlimit[RLIMIT_DATA],                  section   }, \
1473                 { "LimitSTACK",             config_parse_limit,           &(context).rlimit[RLIMIT_STACK],                 section   }, \
1474                 { "LimitCORE",              config_parse_limit,           &(context).rlimit[RLIMIT_CORE],                  section   }, \
1475                 { "LimitRSS",               config_parse_limit,           &(context).rlimit[RLIMIT_RSS],                   section   }, \
1476                 { "LimitNOFILE",            config_parse_limit,           &(context).rlimit[RLIMIT_NOFILE],                section   }, \
1477                 { "LimitAS",                config_parse_limit,           &(context).rlimit[RLIMIT_AS],                    section   }, \
1478                 { "LimitNPROC",             config_parse_limit,           &(context).rlimit[RLIMIT_NPROC],                 section   }, \
1479                 { "LimitMEMLOCK",           config_parse_limit,           &(context).rlimit[RLIMIT_MEMLOCK],               section   }, \
1480                 { "LimitLOCKS",             config_parse_limit,           &(context).rlimit[RLIMIT_LOCKS],                 section   }, \
1481                 { "LimitSIGPENDING",        config_parse_limit,           &(context).rlimit[RLIMIT_SIGPENDING],            section   }, \
1482                 { "LimitMSGQUEUE",          config_parse_limit,           &(context).rlimit[RLIMIT_MSGQUEUE],              section   }, \
1483                 { "LimitNICE",              config_parse_limit,           &(context).rlimit[RLIMIT_NICE],                  section   }, \
1484                 { "LimitRTPRIO",            config_parse_limit,           &(context).rlimit[RLIMIT_RTPRIO],                section   }, \
1485                 { "LimitRTTIME",            config_parse_limit,           &(context).rlimit[RLIMIT_RTTIME],                section   }, \
1486                 { "ControlGroup",           config_parse_cgroup,          u,                                               section   }, \
1487                 { "ReadWriteDirectories",   config_parse_path_strv,       &(context).read_write_dirs,                      section   }, \
1488                 { "ReadOnlyDirectories",    config_parse_path_strv,       &(context).read_only_dirs,                       section   }, \
1489                 { "InaccessibleDirectories",config_parse_path_strv,       &(context).inaccessible_dirs,                    section   }, \
1490                 { "PrivateTmp",             config_parse_bool,            &(context).private_tmp,                          section   }, \
1491                 { "MountFlags",             config_parse_mount_flags,     &(context),                                      section   }, \
1492                 { "TCPWrapName",            config_parse_string_printf,   &(context).tcpwrap_name,                         section   }, \
1493                 { "PAMName",                config_parse_string_printf,   &(context).pam_name,                             section   }
1494
1495         const ConfigItem items[] = {
1496                 { "Names",                  config_parse_names,           u,                                               "Unit"    },
1497                 { "Description",            config_parse_string_printf,   &u->meta.description,                            "Unit"    },
1498                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Unit"    },
1499                 { "RequiresOverridable",    config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES_OVERRIDABLE),          "Unit"    },
1500                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Unit"    },
1501                 { "RequisiteOverridable",   config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE_OVERRIDABLE),         "Unit"    },
1502                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Unit"    },
1503                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Unit"    },
1504                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Unit"    },
1505                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Unit"    },
1506                 { "RecursiveStop",          config_parse_bool,            &u->meta.recursive_stop,                         "Unit"    },
1507                 { "StopWhenUnneeded",       config_parse_bool,            &u->meta.stop_when_unneeded,                     "Unit"    },
1508                 { "OnlyByDependency",       config_parse_bool,            &u->meta.only_by_dependency,                     "Unit"    },
1509
1510                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
1511                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
1512                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
1513                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
1514                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
1515                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
1516                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
1517                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
1518                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
1519                 { "Type",                   config_parse_service_type,    &u->service.type,                                "Service" },
1520                 { "Restart",                config_parse_service_restart, &u->service.restart,                             "Service" },
1521                 { "PermissionsStartOnly",   config_parse_bool,            &u->service.permissions_start_only,              "Service" },
1522                 { "RootDirectoryStartOnly", config_parse_bool,            &u->service.root_directory_start_only,           "Service" },
1523                 { "ValidNoProcess",         config_parse_bool,            &u->service.valid_no_process,                    "Service" },
1524                 { "SysVStartPriority",      config_parse_sysv_priority,   &u->service.sysv_start_priority,                 "Service" },
1525                 { "KillMode",               config_parse_kill_mode,       &u->service.kill_mode,                           "Service" },
1526                 { "NonBlocking",            config_parse_bool,            &u->service.exec_context.non_blocking,           "Service" },
1527                 { "BusName",                config_parse_string_printf,   &u->service.bus_name,                            "Service" },
1528                 { "NotifyAccess",           config_parse_notify_access,   &u->service.notify_access,                       "Service" },
1529                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
1530
1531                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
1532                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
1533                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
1534                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
1535                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
1536                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
1537                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
1538                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
1539                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
1540                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
1541                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
1542                 { "TimeoutSec",             config_parse_usec,            &u->socket.timeout_usec,                         "Socket"  },
1543                 { "DirectoryMode",          config_parse_mode,            &u->socket.directory_mode,                       "Socket"  },
1544                 { "SocketMode",             config_parse_mode,            &u->socket.socket_mode,                          "Socket"  },
1545                 { "KillMode",               config_parse_kill_mode,       &u->socket.kill_mode,                            "Socket"  },
1546                 { "Accept",                 config_parse_bool,            &u->socket.accept,                               "Socket"  },
1547                 { "MaxConnections",         config_parse_unsigned,        &u->socket.max_connections,                      "Socket"  },
1548                 { "KeepAlive",              config_parse_bool,            &u->socket.keep_alive,                           "Socket"  },
1549                 { "Priority",               config_parse_int,             &u->socket.priority,                             "Socket"  },
1550                 { "ReceiveBuffer",          config_parse_size,            &u->socket.receive_buffer,                       "Socket"  },
1551                 { "SendBuffer",             config_parse_size,            &u->socket.send_buffer,                          "Socket"  },
1552                 { "IPTOS",                  config_parse_ip_tos,          &u->socket.ip_tos,                               "Socket"  },
1553                 { "IPTTL",                  config_parse_int,             &u->socket.ip_ttl,                               "Socket"  },
1554                 { "Mark",                   config_parse_int,             &u->socket.mark,                                 "Socket"  },
1555                 { "PipeSize",               config_parse_size,            &u->socket.pipe_size,                            "Socket"  },
1556                 { "FreeBind",               config_parse_bool,            &u->socket.free_bind,                            "Socket"  },
1557                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
1558
1559                 { "What",                   config_parse_string,          &u->mount.parameters_fragment.what,              "Mount"   },
1560                 { "Where",                  config_parse_path,            &u->mount.where,                                 "Mount"   },
1561                 { "Options",                config_parse_string,          &u->mount.parameters_fragment.options,           "Mount"   },
1562                 { "Type",                   config_parse_string,          &u->mount.parameters_fragment.fstype,            "Mount"   },
1563                 { "TimeoutSec",             config_parse_usec,            &u->mount.timeout_usec,                          "Mount"   },
1564                 { "KillMode",               config_parse_kill_mode,       &u->mount.kill_mode,                             "Mount"   },
1565                 { "DirectoryMode",          config_parse_mode,            &u->mount.directory_mode,                        "Mount"   },
1566                 EXEC_CONTEXT_CONFIG_ITEMS(u->mount.exec_context, "Mount"),
1567
1568                 { "Where",                  config_parse_path,            &u->automount.where,                             "Automount" },
1569                 { "DirectoryMode",          config_parse_mode,            &u->automount.directory_mode,                    "Automount" },
1570
1571                 { "What",                   config_parse_path,            &u->swap.parameters_fragment.what,               "Swap"    },
1572                 { "Priority",               config_parse_int,             &u->swap.parameters_fragment.priority,           "Swap"    },
1573
1574                 { "OnActive",               config_parse_timer,           &u->timer,                                       "Timer"   },
1575                 { "OnBoot",                 config_parse_timer,           &u->timer,                                       "Timer"   },
1576                 { "OnStartup",              config_parse_timer,           &u->timer,                                       "Timer"   },
1577                 { "OnUnitActive",           config_parse_timer,           &u->timer,                                       "Timer"   },
1578                 { "OnUnitInactive",         config_parse_timer,           &u->timer,                                       "Timer"   },
1579                 { "Unit",                   config_parse_timer_unit,      &u->timer,                                       "Timer"   },
1580
1581                 { "PathExists",             config_parse_path_spec,       &u->path,                                        "Path"    },
1582                 { "PathChanged",            config_parse_path_spec,       &u->path,                                        "Path"    },
1583                 { "DirectoryNotEmpty",      config_parse_path_spec,       &u->path,                                        "Path"    },
1584                 { "Unit",                   config_parse_path_unit,       &u->path,                                        "Path"    },
1585
1586                 /* The [Install] section is ignored here. */
1587                 { "Alias",                  NULL,                         NULL,                                            "Install" },
1588                 { "WantedBy",               NULL,                         NULL,                                            "Install" },
1589                 { "Also",                   NULL,                         NULL,                                            "Install" },
1590
1591                 { NULL, NULL, NULL, NULL }
1592         };
1593
1594 #undef EXEC_CONTEXT_CONFIG_ITEMS
1595
1596         const char *sections[4];
1597         int r;
1598         Set *symlink_names;
1599         FILE *f = NULL;
1600         char *filename = NULL, *id = NULL;
1601         Unit *merged;
1602
1603         if (!u) {
1604                 /* Dirty dirty hack. */
1605                 dump_items((FILE*) path, items);
1606                 return 0;
1607         }
1608
1609         assert(u);
1610         assert(path);
1611
1612         sections[0] = "Unit";
1613         sections[1] = section_table[u->meta.type];
1614         sections[2] = "Install";
1615         sections[3] = NULL;
1616
1617         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
1618                 return -ENOMEM;
1619
1620         if (path_is_absolute(path)) {
1621
1622                 if (!(filename = strdup(path))) {
1623                         r = -ENOMEM;
1624                         goto finish;
1625                 }
1626
1627                 if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1628                         free(filename);
1629                         filename = NULL;
1630
1631                         if (r != -ENOENT)
1632                                 goto finish;
1633                 }
1634
1635         } else  {
1636                 char **p;
1637
1638                 STRV_FOREACH(p, u->meta.manager->lookup_paths.unit_path) {
1639
1640                         /* Instead of opening the path right away, we manually
1641                          * follow all symlinks and add their name to our unit
1642                          * name set while doing so */
1643                         if (!(filename = path_make_absolute(path, *p))) {
1644                                 r = -ENOMEM;
1645                                 goto finish;
1646                         }
1647
1648                         if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
1649                                 char *sn;
1650
1651                                 free(filename);
1652                                 filename = NULL;
1653
1654                                 if (r != -ENOENT)
1655                                         goto finish;
1656
1657                                 /* Empty the symlink names for the next run */
1658                                 while ((sn = set_steal_first(symlink_names)))
1659                                         free(sn);
1660
1661                                 continue;
1662                         }
1663
1664                         break;
1665                 }
1666         }
1667
1668         if (!filename) {
1669                 r = 0;
1670                 goto finish;
1671         }
1672
1673         merged = u;
1674         if ((r = merge_by_names(&merged, symlink_names, id)) < 0)
1675                 goto finish;
1676
1677         if (merged != u) {
1678                 u->meta.load_state = UNIT_MERGED;
1679                 r = 0;
1680                 goto finish;
1681         }
1682
1683         /* Now, parse the file contents */
1684         if ((r = config_parse(filename, f, sections, items, false, u)) < 0)
1685                 goto finish;
1686
1687         free(u->meta.fragment_path);
1688         u->meta.fragment_path = filename;
1689         filename = NULL;
1690
1691         u->meta.load_state = UNIT_LOADED;
1692         r = 0;
1693
1694 finish:
1695         set_free_free(symlink_names);
1696         free(filename);
1697
1698         if (f)
1699                 fclose(f);
1700
1701         return r;
1702 }
1703
1704 int unit_load_fragment(Unit *u) {
1705         int r;
1706
1707         assert(u);
1708
1709         if (u->meta.fragment_path) {
1710
1711                 if ((r = load_from_path(u, u->meta.fragment_path)) < 0)
1712                         return r;
1713
1714         } else {
1715                 Iterator i;
1716                 const char *t;
1717
1718                 /* Try to find the unit under its id */
1719                 if ((r = load_from_path(u, u->meta.id)) < 0)
1720                         return r;
1721
1722                 /* Try to find an alias we can load this with */
1723                 if (u->meta.load_state == UNIT_STUB)
1724                         SET_FOREACH(t, u->meta.names, i) {
1725
1726                                 if (t == u->meta.id)
1727                                         continue;
1728
1729                                 if ((r = load_from_path(u, t)) < 0)
1730                                         return r;
1731
1732                                 if (u->meta.load_state != UNIT_STUB)
1733                                         break;
1734                         }
1735
1736                 /* Now, follow the same logic, but look for a template */
1737                 if (u->meta.load_state == UNIT_STUB && u->meta.instance) {
1738                         char *k;
1739
1740                         if (!(k = unit_name_template(u->meta.id)))
1741                                 return -ENOMEM;
1742
1743                         r = load_from_path(u, k);
1744                         free(k);
1745
1746                         if (r < 0)
1747                                 return r;
1748
1749                         if (u->meta.load_state == UNIT_STUB)
1750                                 SET_FOREACH(t, u->meta.names, i) {
1751
1752                                         if (t == u->meta.id)
1753                                                 continue;
1754
1755                                         if (!(k = unit_name_template(t)))
1756                                                 return -ENOMEM;
1757
1758                                         r = load_from_path(u, k);
1759                                         free(k);
1760
1761                                         if (r < 0)
1762                                                 return r;
1763
1764                                         if (u->meta.load_state != UNIT_STUB)
1765                                                 break;
1766                                 }
1767                 }
1768         }
1769
1770         return 0;
1771 }
1772
1773 void unit_dump_config_items(FILE *f) {
1774         /* OK, this wins a prize for extreme ugliness. */
1775
1776         load_from_path(NULL, (const void*) f);
1777 }