load-fragment.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #include <linux/oom.h>
   4 #include <assert.h>
   5 #include <errno.h>
   6 #include <string.h>
   7 #include <unistd.h>
   8 #include <fcntl.h>
   9
  10 #include "unit.h"
  11 #include "strv.h"
  12 #include "conf-parser.h"
  13 #include "load-fragment.h"
  14 #include "log.h"
  15
  16 static int config_parse_deps(
  17                 const char *filename,
  18                 unsigned line,
  19                 const char *section,
  20                 const char *lvalue,
  21                 const char *rvalue,
  22                 void *data,
  23                 void *userdata) {
  24
  25         UnitDependency d = PTR_TO_UINT(data);
  26         Unit *u = userdata;
  27         char *w;
  28         size_t l;
  29         char *state;
  30
  31         assert(filename);
  32         assert(lvalue);
  33         assert(rvalue);
  34
  35         FOREACH_WORD(w, &l, rvalue, state) {
  36                 char *t;
  37                 int r;
  38                 Unit *other;
  39
  40                 if (!(t = strndup(w, l)))
  41                         return -ENOMEM;
  42
  43                 r = manager_load_unit(u->meta.manager, t, &other);
  44                 free(t);
  45
  46                 if (r < 0)
  47                         return r;
  48
  49                 if ((r = unit_add_dependency(u, d, other)) < 0)
  50                         return r;
  51         }
  52
  53         return 0;
  54 }
  55
  56 static int config_parse_names(
  57                 const char *filename,
  58                 unsigned line,
  59                 const char *section,
  60                 const char *lvalue,
  61                 const char *rvalue,
  62                 void *data,
  63                 void *userdata) {
  64
  65         Unit *u = userdata;
  66         char *w;
  67         size_t l;
  68         char *state;
  69
  70         assert(filename);
  71         assert(lvalue);
  72         assert(rvalue);
  73         assert(data);
  74
  75         FOREACH_WORD(w, &l, rvalue, state) {
  76                 char *t;
  77                 int r;
  78                 Unit *other;
  79
  80                 if (!(t = strndup(w, l)))
  81                         return -ENOMEM;
  82
  83                 other = manager_get_unit(u->meta.manager, t);
  84
  85                 if (other) {
  86
  87                         if (other != u) {
  88
  89                                 if (other->meta.load_state != UNIT_STUB) {
  90                                         free(t);
  91                                         return -EEXIST;
  92                                 }
  93
  94                                 if ((r = unit_merge(u, other)) < 0) {
  95                                         free(t);
  96                                         return r;
  97                                 }
  98                         }
  99
 100                 } else {
 101                         if ((r = unit_add_name(u, t)) < 0) {
 102                                 free(t);
 103                                 return r;
 104                         }
 105                 }
 106
 107                 free(t);
 108         }
 109
 110         return 0;
 111 }
 112
 113 static int config_parse_listen(
 114                 const char *filename,
 115                 unsigned line,
 116                 const char *section,
 117                 const char *lvalue,
 118                 const char *rvalue,
 119                 void *data,
 120                 void *userdata) {
 121
 122         int r;
 123         SocketPort *p;
 124         Socket *s;
 125
 126         assert(filename);
 127         assert(lvalue);
 128         assert(rvalue);
 129         assert(data);
 130
 131         s = (Socket*) data;
 132
 133         if (!(p = new0(SocketPort, 1)))
 134                 return -ENOMEM;
 135
 136         if (streq(lvalue, "ListenFIFO")) {
 137                 p->type = SOCKET_FIFO;
 138
 139                 if (!(p->path = strdup(rvalue))) {
 140                         free(p);
 141                         return -ENOMEM;
 142                 }
 143         } else {
 144                 p->type = SOCKET_SOCKET;
 145
 146                 if ((r = socket_address_parse(&p->address, rvalue)) < 0) {
 147                         log_error("[%s:%u] Failed to parse address value: %s", filename, line, rvalue);
 148                         free(p);
 149                         return r;
 150                 }
 151
 152                 if (streq(lvalue, "ListenStream"))
 153                         p->address.type = SOCK_STREAM;
 154                 else if (streq(lvalue, "ListenDatagram"))
 155                         p->address.type = SOCK_DGRAM;
 156                 else {
 157                         assert(streq(lvalue, "ListenSequentialPacket"));
 158                         p->address.type = SOCK_SEQPACKET;
 159                 }
 160
 161                 if (socket_address_family(&p->address) != AF_LOCAL && p->address.type == SOCK_SEQPACKET) {
 162                         free(p);
 163                         return -EPROTONOSUPPORT;
 164                 }
 165         }
 166
 167         p->fd = -1;
 168         LIST_PREPEND(SocketPort, port, s->ports, p);
 169
 170         return 0;
 171 }
 172
 173 static int config_parse_socket_bind(
 174                 const char *filename,
 175                 unsigned line,
 176                 const char *section,
 177                 const char *lvalue,
 178                 const char *rvalue,
 179                 void *data,
 180                 void *userdata) {
 181
 182         int r;
 183         Socket *s;
 184
 185         assert(filename);
 186         assert(lvalue);
 187         assert(rvalue);
 188         assert(data);
 189
 190         s = (Socket*) data;
 191
 192         if ((r = parse_boolean(rvalue)) < 0) {
 193                 log_error("[%s:%u] Failed to parse bind IPv6 only value: %s", filename, line, rvalue);
 194                 return r;
 195         }
 196
 197         s->bind_ipv6_only = r ? SOCKET_ADDRESS_IPV6_ONLY : SOCKET_ADDRESS_BOTH;
 198
 199         return 0;
 200 }
 201
 202 static int config_parse_nice(
 203                 const char *filename,
 204                 unsigned line,
 205                 const char *section,
 206                 const char *lvalue,
 207                 const char *rvalue,
 208                 void *data,
 209                 void *userdata) {
 210
 211         int *i = data, priority, r;
 212
 213         assert(filename);
 214         assert(lvalue);
 215         assert(rvalue);
 216         assert(data);
 217
 218         if ((r = safe_atoi(rvalue, &priority)) < 0) {
 219                 log_error("[%s:%u] Failed to parse nice priority: %s", filename, line, rvalue);
 220                 return r;
 221         }
 222
 223         if (priority < PRIO_MIN || priority >= PRIO_MAX) {
 224                 log_error("[%s:%u] Nice priority out of range: %s", filename, line, rvalue);
 225                 return -ERANGE;
 226         }
 227
 228         *i = priority;
 229         return 0;
 230 }
 231
 232 static int config_parse_oom_adjust(
 233                 const char *filename,
 234                 unsigned line,
 235                 const char *section,
 236                 const char *lvalue,
 237                 const char *rvalue,
 238                 void *data,
 239                 void *userdata) {
 240
 241         int *i = data, oa, r;
 242
 243         assert(filename);
 244         assert(lvalue);
 245         assert(rvalue);
 246         assert(data);
 247
 248         if ((r = safe_atoi(rvalue, &oa)) < 0) {
 249                 log_error("[%s:%u] Failed to parse OOM adjust value: %s", filename, line, rvalue);
 250                 return r;
 251         }
 252
 253         if (oa < OOM_DISABLE || oa > OOM_ADJUST_MAX) {
 254                 log_error("[%s:%u] OOM adjust value out of range: %s", filename, line, rvalue);
 255                 return -ERANGE;
 256         }
 257
 258         *i = oa;
 259         return 0;
 260 }
 261
 262 static int config_parse_umask(
 263                 const char *filename,
 264                 unsigned line,
 265                 const char *section,
 266                 const char *lvalue,
 267                 const char *rvalue,
 268                 void *data,
 269                 void *userdata) {
 270
 271         mode_t *m = data;
 272         long l;
 273         char *x = NULL;
 274
 275         assert(filename);
 276         assert(lvalue);
 277         assert(rvalue);
 278         assert(data);
 279
 280         errno = 0;
 281         l = strtol(rvalue, &x, 8);
 282         if (!x || *x || errno) {
 283                 log_error("[%s:%u] Failed to parse umask value: %s", filename, line, rvalue);
 284                 return errno ? -errno : -EINVAL;
 285         }
 286
 287         if (l < 0000 || l > 0777) {
 288                 log_error("[%s:%u] umask value out of range: %s", filename, line, rvalue);
 289                 return -ERANGE;
 290         }
 291
 292         *m = (mode_t) l;
 293         return 0;
 294 }
 295
 296 static int config_parse_exec(
 297                 const char *filename,
 298                 unsigned line,
 299                 const char *section,
 300                 const char *lvalue,
 301                 const char *rvalue,
 302                 void *data,
 303                 void *userdata) {
 304
 305         ExecCommand **e = data, *ee, *nce = NULL;
 306         char **n;
 307         char *w;
 308         unsigned k;
 309         size_t l;
 310         char *state;
 311
 312         assert(filename);
 313         assert(lvalue);
 314         assert(rvalue);
 315         assert(data);
 316
 317         k = 0;
 318         FOREACH_WORD_QUOTED(w, l, rvalue, state)
 319                 k++;
 320
 321         if (!(n = new(char*, k+1)))
 322                 return -ENOMEM;
 323
 324         k = 0;
 325         FOREACH_WORD_QUOTED(w, l, rvalue, state)
 326                 if (!(n[k++] = strndup(w, l)))
 327                         goto fail;
 328
 329         n[k] = NULL;
 330
 331         if (!n[0] || !path_is_absolute(n[0])) {
 332                 log_error("[%s:%u] Invalid executable path in command line: %s", filename, line, rvalue);
 333                 strv_free(n);
 334                 return -EINVAL;
 335         }
 336
 337         if (!(nce = new0(ExecCommand, 1)))
 338                 goto fail;
 339
 340         nce->argv = n;
 341         if (!(nce->path = strdup(n[0])))
 342                 goto fail;
 343
 344         if (*e) {
 345                 /* It's kinda important that we keep the order here */
 346                 LIST_FIND_TAIL(ExecCommand, command, *e, ee);
 347                 LIST_INSERT_AFTER(ExecCommand, command, *e, ee, nce);
 348         } else
 349                 *e = nce;
 350
 351         return 0;
 352
 353 fail:
 354         for (; k > 0; k--)
 355                 free(n[k-1]);
 356         free(n);
 357
 358         free(nce);
 359
 360         return -ENOMEM;
 361 }
 362
 363 static int config_parse_usec(
 364                 const char *filename,
 365                 unsigned line,
 366                 const char *section,
 367                 const char *lvalue,
 368                 const char *rvalue,
 369                 void *data,
 370                 void *userdata) {
 371
 372         usec_t *usec = data;
 373         unsigned long long u;
 374         int r;
 375
 376         assert(filename);
 377         assert(lvalue);
 378         assert(rvalue);
 379         assert(data);
 380
 381         if ((r = safe_atollu(rvalue, &u)) < 0) {
 382                 log_error("[%s:%u] Failed to parse time value: %s", filename, line, rvalue);
 383                 return r;
 384         }
 385
 386         /* We actually assume the user configures seconds. Later on we
 387          * might choose to support suffixes for time values, to
 388          * configure bigger or smaller units */
 389
 390         *usec = u * USEC_PER_SEC;
 391
 392         return 0;
 393 }
 394
 395 static int config_parse_service_type(
 396                 const char *filename,
 397                 unsigned line,
 398                 const char *section,
 399                 const char *lvalue,
 400                 const char *rvalue,
 401                 void *data,
 402                 void *userdata) {
 403
 404         Service *s = data;
 405
 406         assert(filename);
 407         assert(lvalue);
 408         assert(rvalue);
 409         assert(data);
 410
 411         if (streq(rvalue, "forking"))
 412                 s->type = SERVICE_FORKING;
 413         else if (streq(rvalue, "simple"))
 414                 s->type = SERVICE_SIMPLE;
 415         else {
 416                 log_error("[%s:%u] Failed to parse service type: %s", filename, line, rvalue);
 417                 return -EBADMSG;
 418         }
 419
 420         return 0;
 421 }
 422
 423 static int config_parse_service_restart(
 424                 const char *filename,
 425                 unsigned line,
 426                 const char *section,
 427                 const char *lvalue,
 428                 const char *rvalue,
 429                 void *data,
 430                 void *userdata) {
 431
 432         Service *s = data;
 433
 434         assert(filename);
 435         assert(lvalue);
 436         assert(rvalue);
 437         assert(data);
 438
 439         if (streq(rvalue, "once"))
 440                 s->restart = SERVICE_ONCE;
 441         else if (streq(rvalue, "on-success"))
 442                 s->type = SERVICE_RESTART_ON_SUCCESS;
 443         else if (streq(rvalue, "always"))
 444                 s->type = SERVICE_RESTART_ALWAYS;
 445         else {
 446                 log_error("[%s:%u] Failed to parse service type: %s", filename, line, rvalue);
 447                 return -EBADMSG;
 448         }
 449
 450         return 0;
 451 }
 452
 453 int config_parse_bindtodevice(
 454                 const char *filename,
 455                 unsigned line,
 456                 const char *section,
 457                 const char *lvalue,
 458                 const char *rvalue,
 459                 void *data,
 460                 void *userdata) {
 461
 462         Socket *s = data;
 463         char *n;
 464
 465         assert(filename);
 466         assert(lvalue);
 467         assert(rvalue);
 468         assert(data);
 469
 470         if (rvalue[0] && !streq(rvalue, "*")) {
 471                 if (!(n = strdup(rvalue)))
 472                         return -ENOMEM;
 473         } else
 474                 n = NULL;
 475
 476         free(s->bind_to_device);
 477         s->bind_to_device = n;
 478
 479         return 0;
 480 }
 481
 482 int config_parse_output(
 483                 const char *filename,
 484                 unsigned line,
 485                 const char *section,
 486                 const char *lvalue,
 487                 const char *rvalue,
 488                 void *data,
 489                 void *userdata) {
 490
 491         ExecOutput *o = data;
 492
 493         assert(filename);
 494         assert(lvalue);
 495         assert(rvalue);
 496         assert(data);
 497
 498         if (streq(rvalue, "syslog"))
 499                 *o = EXEC_SYSLOG;
 500         else if (streq(rvalue, "null"))
 501                 *o = EXEC_NULL;
 502         else if (streq(rvalue, "syslog"))
 503                 *o = EXEC_SYSLOG;
 504         else if (streq(rvalue, "kernel"))
 505                 *o = EXEC_KERNEL;
 506         else {
 507                 log_error("[%s:%u] Failed to parse log output: %s", filename, line, rvalue);
 508                 return -EBADMSG;
 509         }
 510
 511         return 0;
 512 }
 513
 514 int config_parse_facility(
 515                 const char *filename,
 516                 unsigned line,
 517                 const char *section,
 518                 const char *lvalue,
 519                 const char *rvalue,
 520                 void *data,
 521                 void *userdata) {
 522
 523         static const char * const table[LOG_NFACILITIES] = {
 524                 [LOG_FAC(LOG_KERN)] = "kern",
 525                 [LOG_FAC(LOG_USER)] = "user",
 526                 [LOG_FAC(LOG_MAIL)] = "mail",
 527                 [LOG_FAC(LOG_DAEMON)] = "daemon",
 528                 [LOG_FAC(LOG_AUTH)] = "auth",
 529                 [LOG_FAC(LOG_SYSLOG)] = "syslog",
 530                 [LOG_FAC(LOG_LPR)] = "lpr",
 531                 [LOG_FAC(LOG_NEWS)] = "news",
 532                 [LOG_FAC(LOG_UUCP)] = "uucp",
 533                 [LOG_FAC(LOG_CRON)] = "cron",
 534                 [LOG_FAC(LOG_AUTHPRIV)] = "authpriv",
 535                 [LOG_FAC(LOG_FTP)] = "ftp",
 536                 [LOG_FAC(LOG_LOCAL0)] = "local0",
 537                 [LOG_FAC(LOG_LOCAL1)] = "local1",
 538                 [LOG_FAC(LOG_LOCAL2)] = "local2",
 539                 [LOG_FAC(LOG_LOCAL3)] = "local3",
 540                 [LOG_FAC(LOG_LOCAL4)] = "local4",
 541                 [LOG_FAC(LOG_LOCAL5)] = "local5",
 542                 [LOG_FAC(LOG_LOCAL6)] = "local6",
 543                 [LOG_FAC(LOG_LOCAL7)] = "local7"
 544         };
 545
 546         ExecOutput *o = data;
 547         int i;
 548
 549         assert(filename);
 550         assert(lvalue);
 551         assert(rvalue);
 552         assert(data);
 553
 554         for (i = 0; i < (int) ELEMENTSOF(table); i++)
 555                 if (streq(rvalue, table[i])) {
 556                         *o = LOG_MAKEPRI(i, LOG_PRI(*o));
 557                         break;
 558                 }
 559
 560         if (i >= (int) ELEMENTSOF(table)) {
 561
 562                 /* Second try, let's see if this is a number. */
 563                 if (safe_atoi(rvalue, &i) >= 0 &&
 564                     i >= 0 &&
 565                     i < (int) ELEMENTSOF(table))
 566                         *o = LOG_MAKEPRI(i, LOG_PRI(*o));
 567                 else {
 568                         log_error("[%s:%u] Failed to parse log output: %s", filename, line, rvalue);
 569                         return -EBADMSG;
 570                 }
 571         }
 572
 573         return 0;
 574 }
 575
 576 int config_parse_level(
 577                 const char *filename,
 578                 unsigned line,
 579                 const char *section,
 580                 const char *lvalue,
 581                 const char *rvalue,
 582                 void *data,
 583                 void *userdata) {
 584
 585         static const char * const table[LOG_DEBUG+1] = {
 586                 [LOG_EMERG] = "emerg",
 587                 [LOG_ALERT] = "alert",
 588                 [LOG_CRIT] = "crit",
 589                 [LOG_ERR] = "err",
 590                 [LOG_WARNING] = "warning",
 591                 [LOG_NOTICE] = "notice",
 592                 [LOG_INFO] = "info",
 593                 [LOG_DEBUG] = "debug"
 594         };
 595
 596         ExecOutput *o = data;
 597         int i;
 598
 599         assert(filename);
 600         assert(lvalue);
 601         assert(rvalue);
 602         assert(data);
 603
 604         for (i = 0; i < (int) ELEMENTSOF(table); i++)
 605                 if (streq(rvalue, table[i])) {
 606                         *o = LOG_MAKEPRI(LOG_FAC(*o), i);
 607                         break;
 608                 }
 609
 610         if (i >= LOG_NFACILITIES) {
 611
 612                 /* Second try, let's see if this is a number. */
 613                 if (safe_atoi(rvalue, &i) >= 0 &&
 614                     i >= 0 &&
 615                     i < (int) ELEMENTSOF(table))
 616                         *o = LOG_MAKEPRI(LOG_FAC(*o), i);
 617                 else {
 618                         log_error("[%s:%u] Failed to parse log output: %s", filename, line, rvalue);
 619                         return -EBADMSG;
 620                 }
 621         }
 622
 623         return 0;
 624 }
 625
 626 #define FOLLOW_MAX 8
 627
 628 static int open_follow(char **filename, FILE **_f, Set *names, char **_id) {
 629         unsigned c = 0;
 630         int fd, r;
 631         FILE *f;
 632         char *id = NULL;
 633
 634         assert(filename);
 635         assert(*filename);
 636         assert(_f);
 637         assert(names);
 638
 639         /* This will update the filename pointer if the loaded file is
 640          * reached by a symlink. The old string will be freed. */
 641
 642         for (;;) {
 643                 char *target, *k, *name;
 644
 645                 if (c++ >= FOLLOW_MAX)
 646                         return -ELOOP;
 647
 648                 /* Add the file name we are currently looking at to
 649                  * the names of this unit */
 650                 name = file_name_from_path(*filename);
 651                 if (!(id = set_get(names, name))) {
 652
 653                         if (!(id = strdup(name)))
 654                                 return -ENOMEM;
 655
 656                         if ((r = set_put(names, id)) < 0) {
 657                                 free(id);
 658                                 return r;
 659                         }
 660                 }
 661
 662                 /* Try to open the file name, but don't if its a symlink */
 663                 if ((fd = open(*filename, O_RDONLY|O_CLOEXEC|O_NOCTTY|O_NOFOLLOW)) >= 0)
 664                         break;
 665
 666                 if (errno != ELOOP)
 667                         return -errno;
 668
 669                 /* Hmm, so this is a symlink. Let's read the name, and follow it manually */
 670                 if ((r = readlink_malloc(*filename, &target)) < 0)
 671                         return r;
 672
 673                 k = file_in_same_dir(*filename, target);
 674                 free(target);
 675
 676                 if (!k)
 677                         return -ENOMEM;
 678
 679                 free(*filename);
 680                 *filename = k;
 681         }
 682
 683         if (!(f = fdopen(fd, "r"))) {
 684                 r = -errno;
 685                 assert(close_nointr(fd) == 0);
 686                 return r;
 687         }
 688
 689         *_f = f;
 690         *_id = id;
 691         return 0;
 692 }
 693
 694 static int load_from_path(Unit *u, const char *path) {
 695
 696         static const char* const section_table[_UNIT_TYPE_MAX] = {
 697                 [UNIT_SERVICE]   = "Service",
 698                 [UNIT_TIMER]     = "Timer",
 699                 [UNIT_SOCKET]    = "Socket",
 700                 [UNIT_TARGET]    = "Target",
 701                 [UNIT_DEVICE]    = "Device",
 702                 [UNIT_MOUNT]     = "Mount",
 703                 [UNIT_AUTOMOUNT] = "Automount",
 704                 [UNIT_SNAPSHOT]  = "Snapshot"
 705         };
 706
 707 #define EXEC_CONTEXT_CONFIG_ITEMS(context, section) \
 708                 { "Directory",              config_parse_path,            &(context).directory,                            section   }, \
 709                 { "User",                   config_parse_string,          &(context).user,                                 section   }, \
 710                 { "Group",                  config_parse_string,          &(context).group,                                section   }, \
 711                 { "SupplementaryGroups",    config_parse_strv,            &(context).supplementary_groups,                 section   }, \
 712                 { "Nice",                   config_parse_nice,            &(context).nice,                                 section   }, \
 713                 { "OOMAdjust",              config_parse_oom_adjust,      &(context).oom_adjust,                           section   }, \
 714                 { "UMask",                  config_parse_umask,           &(context).umask,                                section   }, \
 715                 { "Environment",            config_parse_strv,            &(context).environment,                          section   }, \
 716                 { "Output",                 config_parse_output,          &(context).output,                               section   }, \
 717                 { "SyslogIdentifier",       config_parse_string,          &(context).syslog_identifier,                    section   }, \
 718                 { "SyslogFacility",         config_parse_facility,        &(context).syslog_priority,                      section   }, \
 719                 { "SyslogLevel",            config_parse_level,           &(context).syslog_priority,                      section   }
 720
 721         const ConfigItem items[] = {
 722                 { "Names",                  config_parse_names,           u,                                               "Meta"    },
 723                 { "Description",            config_parse_string,          &u->meta.description,                            "Meta"    },
 724                 { "Requires",               config_parse_deps,            UINT_TO_PTR(UNIT_REQUIRES),                      "Meta"    },
 725                 { "SoftRequires",           config_parse_deps,            UINT_TO_PTR(UNIT_SOFT_REQUIRES),                 "Meta"    },
 726                 { "Wants",                  config_parse_deps,            UINT_TO_PTR(UNIT_WANTS),                         "Meta"    },
 727                 { "Requisite",              config_parse_deps,            UINT_TO_PTR(UNIT_REQUISITE),                     "Meta"    },
 728                 { "SoftRequisite",          config_parse_deps,            UINT_TO_PTR(UNIT_SOFT_REQUISITE),                "Meta"    },
 729                 { "Conflicts",              config_parse_deps,            UINT_TO_PTR(UNIT_CONFLICTS),                     "Meta"    },
 730                 { "Before",                 config_parse_deps,            UINT_TO_PTR(UNIT_BEFORE),                        "Meta"    },
 731                 { "After",                  config_parse_deps,            UINT_TO_PTR(UNIT_AFTER),                         "Meta"    },
 732
 733                 { "PIDFile",                config_parse_path,            &u->service.pid_file,                            "Service" },
 734                 { "ExecStartPre",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_PRE,  "Service" },
 735                 { "ExecStart",              config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START,      "Service" },
 736                 { "ExecStartPost",          config_parse_exec,            u->service.exec_command+SERVICE_EXEC_START_POST, "Service" },
 737                 { "ExecReload",             config_parse_exec,            u->service.exec_command+SERVICE_EXEC_RELOAD,     "Service" },
 738                 { "ExecStop",               config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP,       "Service" },
 739                 { "ExecStopPost",           config_parse_exec,            u->service.exec_command+SERVICE_EXEC_STOP_POST,  "Service" },
 740                 { "RestartSec",             config_parse_usec,            &u->service.restart_usec,                        "Service" },
 741                 { "TimeoutSec",             config_parse_usec,            &u->service.timeout_usec,                        "Service" },
 742                 { "Type",                   config_parse_service_type,    &u->service,                                     "Service" },
 743                 { "Restart",                config_parse_service_restart, &u->service,                                     "Service" },
 744                 EXEC_CONTEXT_CONFIG_ITEMS(u->service.exec_context, "Service"),
 745
 746                 { "ListenStream",           config_parse_listen,          &u->socket,                                      "Socket"  },
 747                 { "ListenDatagram",         config_parse_listen,          &u->socket,                                      "Socket"  },
 748                 { "ListenSequentialPacket", config_parse_listen,          &u->socket,                                      "Socket"  },
 749                 { "ListenFIFO",             config_parse_listen,          &u->socket,                                      "Socket"  },
 750                 { "BindIPv6Only",           config_parse_socket_bind,     &u->socket,                                      "Socket"  },
 751                 { "Backlog",                config_parse_unsigned,        &u->socket.backlog,                              "Socket"  },
 752                 { "BindToDevice",           config_parse_bindtodevice,    &u->socket,                                      "Socket"  },
 753                 { "ExecStartPre",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_PRE,    "Socket"  },
 754                 { "ExecStartPost",          config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_START_POST,   "Socket"  },
 755                 { "ExecStopPre",            config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_PRE,     "Socket"  },
 756                 { "ExecStopPost",           config_parse_exec,            u->socket.exec_command+SOCKET_EXEC_STOP_POST,    "Socket"  },
 757                 EXEC_CONTEXT_CONFIG_ITEMS(u->socket.exec_context, "Socket"),
 758
 759                 EXEC_CONTEXT_CONFIG_ITEMS(u->automount.exec_context, "Automount"),
 760
 761                 { NULL, NULL, NULL, NULL }
 762         };
 763
 764 #undef EXEC_CONTEXT_CONFIG_ITEMS
 765
 766         const char *sections[3];
 767         char *k;
 768         int r;
 769         Set *symlink_names;
 770         FILE *f;
 771         char *filename, *id;
 772
 773         sections[0] = "Meta";
 774         sections[1] = section_table[u->meta.type];
 775         sections[2] = NULL;
 776
 777         if (!(symlink_names = set_new(string_hash_func, string_compare_func)))
 778                 return -ENOMEM;
 779
 780         /* Instead of opening the path right away, we manually
 781          * follow all symlinks and add their name to our unit
 782          * name set while doing so */
 783         if (!(filename = path_make_absolute(path, unit_path()))) {
 784                 r = -ENOMEM;
 785                 goto finish;
 786         }
 787
 788         if ((r = open_follow(&filename, &f, symlink_names, &id)) < 0) {
 789                 if (r == -ENOENT)
 790                         r = 0; /* returning 0 means: no suitable config file found */
 791
 792                 goto finish;
 793         }
 794
 795         /* Now, parse the file contents */
 796         r = config_parse(filename, f, sections, items, u);
 797         if (r < 0)
 798                 goto finish;
 799
 800         /* Let's try to add in all symlink names we found */
 801         while ((k = set_steal_first(symlink_names))) {
 802                 if ((r = unit_add_name(u, k)) < 0)
 803                         goto finish;
 804
 805                 if (id == k)
 806                         assert_se(u->meta.id = set_get(u->meta.names, k));
 807
 808                 free(k);
 809         }
 810
 811         free(u->meta.load_path);
 812         u->meta.load_path = filename;
 813         filename = NULL;
 814
 815         r = 1; /* returning 1 means: suitable config file found and loaded */
 816
 817 finish:
 818         while ((k = set_steal_first(symlink_names)))
 819                 free(k);
 820         set_free(symlink_names);
 821         free(filename);
 822
 823         return r;
 824 }
 825
 826 int unit_load_fragment(Unit *u) {
 827         int r = -ENOENT;
 828         ExecContext *c;
 829
 830         assert(u);
 831         assert(u->meta.load_state == UNIT_STUB);
 832
 833         if (u->meta.load_path)
 834                 r = load_from_path(u, u->meta.load_path);
 835         else {
 836                 Iterator i;
 837                 char *t;
 838
 839                 /* Try to find a name we can load this with */
 840                 SET_FOREACH(t, u->meta.names, i)
 841                         if ((r = load_from_path(u, t)) != 0)
 842                                 return r;
 843         }
 844
 845         if (u->meta.type == UNIT_SOCKET)
 846                 c = &u->socket.exec_context;
 847         else if (u->meta.type == UNIT_SERVICE)
 848                 c = &u->service.exec_context;
 849         else
 850                 c = NULL;
 851
 852         if (r >= 0 && c &&
 853             (c->output == EXEC_KERNEL || c->output == EXEC_SYSLOG)) {
 854                 /* If syslog or kernel logging is requested, make sure
 855                  * our own logging daemon is run first. */
 856
 857                 if ((r = unit_add_dependency(u, UNIT_AFTER, u->meta.manager->special_units[SPECIAL_LOGGER_SOCKET])) < 0)
 858                         return r;
 859
 860                 if ((r = unit_add_dependency(u, UNIT_REQUIRES, u->meta.manager->special_units[SPECIAL_LOGGER_SOCKET])) < 0)
 861                         return r;
 862         }
 863
 864         return r;
 865 }