src/core/dynamic-user.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #pragma once
   3
   4 /***
   5   Copyright 2016 Lennart Poettering
   6 ***/
   7
   8 typedef struct DynamicUser DynamicUser;
   9
  10 typedef struct DynamicCreds {
  11         /* A combination of a dynamic user and group */
  12         DynamicUser *user;
  13         DynamicUser *group;
  14 } DynamicCreds;
  15
  16 #include "manager.h"
  17
  18 /* Note that this object always allocates a pair of user and group under the same name, even if one of them isn't
  19  * used. This means, if you want to allocate a group and user pair, and they might have two different names, then you
  20  * need to allocated two of these objects. DynamicCreds below makes that easy. */
  21 struct DynamicUser {
  22         int n_ref;
  23         Manager *manager;
  24
  25         /* An AF_UNIX socket pair that contains a datagram containing both the numeric ID assigned, as well as a lock
  26          * file fd locking the user ID we picked. */
  27         int storage_socket[2];
  28
  29         char name[];
  30 };
  31
  32 int dynamic_user_serialize(Manager *m, FILE *f, FDSet *fds);
  33 void dynamic_user_deserialize_one(Manager *m, const char *value, FDSet *fds);
  34 void dynamic_user_vacuum(Manager *m, bool close_user);
  35
  36 int dynamic_user_current(DynamicUser *d, uid_t *ret);
  37 int dynamic_user_lookup_uid(Manager *m, uid_t uid, char **ret);
  38 int dynamic_user_lookup_name(Manager *m, const char *name, uid_t *ret);
  39
  40 int dynamic_creds_acquire(DynamicCreds *creds, Manager *m, const char *user, const char *group);
  41 int dynamic_creds_realize(DynamicCreds *creds, char **suggested_paths, uid_t *uid, gid_t *gid);
  42
  43 void dynamic_creds_unref(DynamicCreds *creds);
  44 void dynamic_creds_destroy(DynamicCreds *creds);