load-dropin.c

   1 /*-*- Mode: C; c-basic-offset: 8 -*-*/
   2
   3 #include <dirent.h>
   4 #include <errno.h>
   5
   6 #include "unit.h"
   7 #include "load-dropin.h"
   8 #include "log.h"
   9
  10 int unit_load_dropin(Unit *u) {
  11         Iterator i;
  12         int r;
  13         char *t;
  14
  15         assert(u);
  16
  17         /* Load dependencies from supplementary drop-in directories */
  18
  19         SET_FOREACH(t, u->meta.names, i) {
  20                 char *path;
  21                 DIR *d;
  22                 struct dirent *de;
  23
  24                 if (asprintf(&path, "%s/%s.wants", unit_path(), t) < 0)
  25                         return -ENOMEM;
  26
  27                 if (!(d = opendir(path))) {
  28                         r = -errno;
  29                         free(path);
  30
  31                         if (r == -ENOENT)
  32                                 continue;
  33
  34                         return r;
  35                 }
  36
  37                 free(path);
  38
  39                 while ((de = readdir(d))) {
  40                         Unit *other;
  41
  42                         if (de->d_name[0] == '.')
  43                                 continue;
  44
  45                         assert(de->d_name[0]);
  46
  47                         if (de->d_name[strlen(de->d_name)-1] == '~')
  48                                 continue;
  49
  50                         if (asprintf(&path, "%s/%s.wants/%s", unit_path(), t, de->d_name) < 0) {
  51                                 closedir(d);
  52                                 return -ENOMEM;
  53                         }
  54
  55                         if (!unit_name_is_valid(de->d_name)) {
  56                                 log_info("Name of %s is not a valid unit name. Ignoring.", path);
  57                                 free(path);
  58                                 continue;
  59                         }
  60
  61                         r = manager_load_unit(u->meta.manager, path, &other);
  62                         free(path);
  63
  64                         if (r < 0) {
  65                                 closedir(d);
  66                                 return r;
  67                         }
  68
  69                         if ((r = unit_add_dependency(u, UNIT_WANTS, other)) < 0) {
  70                                 closedir(d);
  71                                 return r;
  72                         }
  73                 }
  74
  75                 closedir(d);
  76         }
  77
  78         return 0;
  79 }