src/core/load-dropin.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2010 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20
  21 #include "conf-parser.h"
  22 #include "load-dropin.h"
  23 #include "load-fragment.h"
  24 #include "log.h"
  25 #include "strv.h"
  26 #include "unit-name.h"
  27 #include "unit.h"
  28
  29 static int add_dependency_consumer(
  30                 UnitDependency dependency,
  31                 const char *entry,
  32                 const char* filepath,
  33                 void *arg) {
  34         Unit *u = arg;
  35         int r;
  36
  37         assert(u);
  38
  39         r = unit_add_dependency_by_name(u, dependency, entry, filepath, true);
  40         if (r < 0)
  41                 log_error_errno(r, "Cannot add dependency %s to %s, ignoring: %m", entry, u->id);
  42
  43         return 0;
  44 }
  45
  46 int unit_load_dropin(Unit *u) {
  47         Iterator i;
  48         char *t, **f;
  49         int r;
  50
  51         assert(u);
  52
  53         /* Load dependencies from supplementary drop-in directories */
  54
  55         SET_FOREACH(t, u->names, i) {
  56                 char **p;
  57
  58                 STRV_FOREACH(p, u->manager->lookup_paths.unit_path) {
  59                         unit_file_process_dir(u->manager->unit_path_cache, *p, t, ".wants", UNIT_WANTS,
  60                                               add_dependency_consumer, u, NULL);
  61                         unit_file_process_dir(u->manager->unit_path_cache, *p, t, ".requires", UNIT_REQUIRES,
  62                                               add_dependency_consumer, u, NULL);
  63                 }
  64         }
  65
  66         u->dropin_paths = strv_free(u->dropin_paths);
  67         r = unit_find_dropin_paths(u, &u->dropin_paths);
  68         if (r <= 0)
  69                 return 0;
  70
  71         STRV_FOREACH(f, u->dropin_paths) {
  72                 config_parse(u->id, *f, NULL,
  73                              UNIT_VTABLE(u)->sections,
  74                              config_item_perf_lookup, load_fragment_gperf_lookup,
  75                              false, false, false, u);
  76         }
  77
  78         u->dropin_mtime = now(CLOCK_REALTIME);
  79
  80         return 0;
  81 }