/**
* Gets the home directory for the given user.
*
* @param uid the uid
* @param homedir string to append home directory to
* @returns #TRUE if user existed and we appended their homedir
*/
dbus_bool_t
_dbus_homedir_from_uid (dbus_uid_t uid,
DBusString *homedir)
{
DBusUserDatabase *db;
const DBusUserInfo *info;
/* FIXME: this can't distinguish ENOMEM from other errors */
if (!_dbus_user_database_lock_system ())
return FALSE;
db = _dbus_user_database_get_system ();
if (db == NULL)
{
_dbus_user_database_unlock_system ();
return FALSE;
}
if (!_dbus_user_database_get_uid (db, uid,
&info, NULL))
{
_dbus_user_database_unlock_system ();
return FALSE;
}
if (!_dbus_string_append (homedir, info->homedir))
{
_dbus_user_database_unlock_system ();
return FALSE;
}
_dbus_user_database_unlock_system ();
return TRUE;
}
/**
* Gets the home directory for the given user.
*
* @param uid the uid
* @param homedir string to append home directory to
* @returns #TRUE if user existed and we appended their homedir
*/
dbus_bool_t
_dbus_homedir_from_uid (dbus_uid_t uid,
DBusString *homedir)
{
DBusUserDatabase *db;
const DBusUserInfo *info;
_dbus_user_database_lock_system ();
db = _dbus_user_database_get_system ();
if (db == NULL)
{
_dbus_user_database_unlock_system ();
return FALSE;
}
if (!_dbus_user_database_get_uid (db, uid,
&info, NULL))
{
_dbus_user_database_unlock_system ();
return FALSE;
}
if (!_dbus_string_append (homedir, info->homedir))
{
_dbus_user_database_unlock_system ();
return FALSE;
}
_dbus_user_database_unlock_system ();
return TRUE;
}
/**
* Gets all groups corresponding to the given UID. Returns #FALSE
* if no memory, or user isn't known, but always initializes
* group_ids to a NULL array.
*
* @param uid the UID
* @param group_ids return location for array of group IDs
* @param n_group_ids return location for length of returned array
* @returns #TRUE if the UID existed and we got some credentials
*/
dbus_bool_t
_dbus_groups_from_uid (dbus_uid_t uid,
dbus_gid_t **group_ids,
int *n_group_ids)
{
DBusUserDatabase *db;
const DBusUserInfo *info;
*group_ids = NULL;
*n_group_ids = 0;
/* FIXME: this can't distinguish ENOMEM from other errors */
if (!_dbus_user_database_lock_system ())
return FALSE;
db = _dbus_user_database_get_system ();
if (db == NULL)
{
_dbus_user_database_unlock_system ();
return FALSE;
}
if (!_dbus_user_database_get_uid (db, uid,
&info, NULL))
{
_dbus_user_database_unlock_system ();
return FALSE;
}
_dbus_assert (info->uid == uid);
if (info->n_group_ids > 0)
{
*group_ids = dbus_new (dbus_gid_t, info->n_group_ids);
if (*group_ids == NULL)
{
_dbus_user_database_unlock_system ();
return FALSE;
}
*n_group_ids = info->n_group_ids;
memcpy (*group_ids, info->group_ids, info->n_group_ids * sizeof (dbus_gid_t));
}
_dbus_user_database_unlock_system ();
return TRUE;
}
static dbus_bool_t
init_system_db (void)
{
_dbus_assert (database_locked);
if (system_db == NULL)
{
DBusError error;
const DBusUserInfo *info;
system_db = _dbus_user_database_new ();
if (system_db == NULL)
return FALSE;
dbus_error_init (&error);
if (!_dbus_user_database_get_uid (system_db,
_dbus_getuid (),
&info,
&error))
{
_dbus_user_database_unref (system_db);
system_db = NULL;
if (dbus_error_has_name (&error, DBUS_ERROR_NO_MEMORY))
{
dbus_error_free (&error);
return FALSE;
}
else
{
/* This really should not happen. */
_dbus_warn ("Could not get password database information for UID of current process: %s\n",
error.message);
dbus_error_free (&error);
return FALSE;
}
}
if (!_dbus_string_init (&process_username))
{
_dbus_user_database_unref (system_db);
system_db = NULL;
return FALSE;
}
if (!_dbus_string_init (&process_homedir))
{
_dbus_string_free (&process_username);
_dbus_user_database_unref (system_db);
system_db = NULL;
return FALSE;
}
if (!_dbus_string_append (&process_username,
info->username) ||
!_dbus_string_append (&process_homedir,
info->homedir) ||
!_dbus_register_shutdown_func (shutdown_system_db, NULL))
{
_dbus_string_free (&process_username);
_dbus_string_free (&process_homedir);
_dbus_user_database_unref (system_db);
system_db = NULL;
return FALSE;
}
}
return TRUE;
}
