src/core/dynamic-user.h

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2 #pragma once
   3
   4 typedef struct DynamicUser DynamicUser;
   5
   6 typedef struct DynamicCreds {
   7         /* A combination of a dynamic user and group */
   8         DynamicUser *user;
   9         DynamicUser *group;
  10 } DynamicCreds;
  11
  12 #include "manager.h"
  13
  14 /* Note that this object always allocates a pair of user and group under the same name, even if one of them isn't
  15  * used. This means, if you want to allocate a group and user pair, and they might have two different names, then you
  16  * need to allocated two of these objects. DynamicCreds below makes that easy. */
  17 struct DynamicUser {
  18         Manager *manager;
  19         unsigned n_ref;
  20
  21         /* An AF_UNIX socket pair that contains a datagram containing both the numeric ID assigned, as well as a lock
  22          * file fd locking the user ID we picked. */
  23         int storage_socket[2];
  24
  25         char name[];
  26 };
  27
  28 int dynamic_user_serialize(Manager *m, FILE *f, FDSet *fds);
  29 void dynamic_user_deserialize_one(Manager *m, const char *value, FDSet *fds);
  30 void dynamic_user_vacuum(Manager *m, bool close_user);
  31
  32 int dynamic_user_current(DynamicUser *d, uid_t *ret);
  33 int dynamic_user_lookup_uid(Manager *m, uid_t uid, char **ret);
  34 int dynamic_user_lookup_name(Manager *m, const char *name, uid_t *ret);
  35
  36 int dynamic_creds_make(Manager *m, const char *user, const char *group, DynamicCreds **ret);
  37 int dynamic_creds_realize(DynamicCreds *creds, char **suggested_paths, uid_t *uid, gid_t *gid);
  38
  39 DynamicCreds *dynamic_creds_unref(DynamicCreds *creds);
  40 DynamicCreds *dynamic_creds_destroy(DynamicCreds *creds);
  41
  42 DEFINE_TRIVIAL_CLEANUP_FUNC(DynamicCreds*, dynamic_creds_unref);
  43 DEFINE_TRIVIAL_CLEANUP_FUNC(DynamicCreds*, dynamic_creds_destroy);