load-dropin.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 <dirent.h>
  23 #include <errno.h>
  24
  25 #include "unit.h"
  26 #include "load-dropin.h"
  27 #include "log.h"
  28 #include "strv.h"
  29
  30 int unit_load_dropin(Unit *u) {
  31         Iterator i;
  32         int r;
  33         char *t;
  34
  35         assert(u);
  36
  37         /* Load dependencies from supplementary drop-in directories */
  38
  39         SET_FOREACH(t, u->meta.names, i) {
  40                 char *path;
  41                 DIR *d;
  42                 struct dirent *de;
  43                 char **p;
  44
  45                 STRV_FOREACH(p, u->meta.manager->unit_path) {
  46
  47                         if (asprintf(&path, "%s/%s.wants", *p, t) < 0)
  48                                 return -ENOMEM;
  49
  50                         if (!(d = opendir(path))) {
  51                                 r = -errno;
  52                                 free(path);
  53
  54                                 if (r == -ENOENT)
  55                                         continue;
  56
  57                                 return r;
  58                         }
  59
  60                         free(path);
  61
  62                         while ((de = readdir(d))) {
  63
  64                                 if (ignore_file(de->d_name))
  65                                         continue;
  66
  67                                 if (asprintf(&path, "%s/%s.wants/%s", *p, t, de->d_name) < 0) {
  68                                         closedir(d);
  69                                         return -ENOMEM;
  70                                 }
  71
  72                                 if (!unit_name_is_valid(de->d_name)) {
  73                                         log_info("Name of %s is not a valid unit name. Ignoring.", path);
  74                                         free(path);
  75                                         continue;
  76                                 }
  77
  78                                 r = unit_add_dependency_by_name(u, UNIT_WANTS, path);
  79                                 free(path);
  80
  81                                 if (r < 0) {
  82                                         closedir(d);
  83                                         return r;
  84                                 }
  85                         }
  86
  87                         closedir(d);
  88                 }
  89         }
  90
  91         return 0;
  92 }