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
   9 int unit_load_dropin(Unit *u) {
  10         Iterator i;
  11         int r;
  12         char *t;
  13
  14         assert(u);
  15
  16         /* Load dependencies from supplementary drop-in directories */
  17
  18         SET_FOREACH(t, u->meta.names, i) {
  19                 char *path;
  20                 DIR *d;
  21                 struct dirent *de;
  22
  23                 if (asprintf(&path, "%s/%s.wants", unit_path(), t) < 0)
  24                         return -ENOMEM;
  25
  26                 if (!(d = opendir(path))) {
  27                         r = -errno;
  28                         free(path);
  29
  30                         if (r == -ENOENT)
  31                                 continue;
  32
  33                         return r;
  34                 }
  35
  36                 free(path);
  37
  38                 while ((de = readdir(d))) {
  39                         Unit *other;
  40
  41                         if (de->d_name[0] == '.')
  42                                 continue;
  43
  44                         assert(de->d_name[0]);
  45
  46                         if (de->d_name[strlen(de->d_name)-1] == '~')
  47                                 continue;
  48
  49                         if (asprintf(&path, "%s/%s.wants/%s", unit_path(), t, de->d_name) < 0) {
  50                                 closedir(d);
  51                                 return -ENOMEM;
  52                         }
  53
  54                         r = manager_load_unit(u->meta.manager, path, &other);
  55                         free(path);
  56
  57                         if (r < 0) {
  58                                 closedir(d);
  59                                 return r;
  60                         }
  61
  62                         if ((r = unit_add_dependency(u, UNIT_WANTS, other)) < 0) {
  63                                 closedir(d);
  64                                 return r;
  65                         }
  66                 }
  67
  68                 closedir(d);
  69         }
  70
  71         return 0;
  72 }