]>
git.ipfire.org Git - thirdparty/systemd.git/blob - src/core/dynamic-user.c
1 /* SPDX-License-Identifier: LGPL-2.1+ */
8 #include "dynamic-user.h"
13 #include "parse-util.h"
14 #include "random-util.h"
15 #include "socket-util.h"
16 #include "stdio-util.h"
17 #include "string-util.h"
18 #include "user-util.h"
20 /* Takes a value generated randomly or by hashing and turns it into a UID in the right range */
21 #define UID_CLAMP_INTO_RANGE(rnd) (((uid_t) (rnd) % (DYNAMIC_UID_MAX - DYNAMIC_UID_MIN + 1)) + DYNAMIC_UID_MIN)
23 static DynamicUser
* dynamic_user_free ( DynamicUser
* d
) {
28 ( void ) hashmap_remove ( d
-> manager
-> dynamic_users
, d
-> name
);
30 safe_close_pair ( d
-> storage_socket
);
34 static int dynamic_user_add ( Manager
* m
, const char * name
, int storage_socket
[ 2 ], DynamicUser
** ret
) {
35 DynamicUser
* d
= NULL
;
40 assert ( storage_socket
);
42 r
= hashmap_ensure_allocated (& m
-> dynamic_users
, & string_hash_ops
);
46 d
= malloc0 ( offsetof ( DynamicUser
, name
) + strlen ( name
) + 1 );
50 strcpy ( d
-> name
, name
);
52 d
-> storage_socket
[ 0 ] = storage_socket
[ 0 ];
53 d
-> storage_socket
[ 1 ] = storage_socket
[ 1 ];
55 r
= hashmap_put ( m
-> dynamic_users
, d
-> name
, d
);
69 static int dynamic_user_acquire ( Manager
* m
, const char * name
, DynamicUser
** ret
) {
70 _cleanup_close_pair_
int storage_socket
[ 2 ] = { - 1 , - 1 };
77 /* Return the DynamicUser structure for a specific user name. Note that this won't actually allocate a UID for
78 * it, but just prepare the data structure for it. The UID is allocated only on demand, when it's really
79 * needed, and in the child process we fork off, since allocation involves NSS checks which are not OK to do
80 * from PID 1. To allow the children and PID 1 share information about allocated UIDs we use an anonymous
81 * AF_UNIX/SOCK_DGRAM socket (called the "storage socket") that contains at most one datagram with the
82 * allocated UID number, plus an fd referencing the lock file for the UID
83 * (i.e. /run/systemd/dynamic-uid/$UID). Why involve the socket pair? So that PID 1 and all its children can
84 * share the same storage for the UID and lock fd, simply by inheriting the storage socket fds. The socket pair
85 * may exist in three different states:
87 * a) no datagram stored. This is the initial state. In this case the dynamic user was never realized.
89 * b) a datagram containing a UID stored, but no lock fd attached to it. In this case there was already a
90 * statically assigned UID by the same name, which we are reusing.
92 * c) a datagram containing a UID stored, and a lock fd is attached to it. In this case we allocated a dynamic
93 * UID and locked it in the file system, using the lock fd.
95 * As PID 1 and various children might access the socket pair simultaneously, and pop the datagram or push it
96 * back in any time, we also maintain a lock on the socket pair. Note one peculiarity regarding locking here:
97 * the UID lock on disk is protected via a BSD file lock (i.e. an fd-bound lock), so that the lock is kept in
98 * place as long as there's a reference to the fd open. The lock on the storage socket pair however is a POSIX
99 * file lock (i.e. a process-bound lock), as all users share the same fd of this (after all it is anonymous,
100 * nobody else could get any access to it except via our own fd) and we want to synchronize access between all
101 * processes that have access to it. */
103 d
= hashmap_get ( m
-> dynamic_users
, name
);
105 /* We already have a structure for the dynamic user, let's increase the ref count and reuse it */
111 if (! valid_user_group_name_or_id ( name
))
114 if ( socketpair ( AF_UNIX
, SOCK_DGRAM
| SOCK_CLOEXEC
, 0 , storage_socket
) < 0 )
117 r
= dynamic_user_add ( m
, name
, storage_socket
, & d
);
121 storage_socket
[ 0 ] = storage_socket
[ 1 ] = - 1 ;
131 static int make_uid_symlinks ( uid_t uid
, const char * name
, bool b
) {
133 char path1
[ STRLEN ( "/run/systemd/dynamic-uid/direct:" ) + DECIMAL_STR_MAX ( uid_t
) + 1 ];
137 /* Add direct additional symlinks for direct lookups of dynamic UIDs and their names by userspace code. The
138 * only reason we have this is because dbus-daemon cannot use D-Bus for resolving users and groups (since it
139 * would be its own client then). We hence keep these world-readable symlinks in place, so that the
140 * unprivileged dbus user can read the mappings when it needs them via these symlinks instead of having to go
141 * via the bus. Ideally, we'd use the lock files we keep for this anyway, but we can't since we use BSD locks
142 * on them and as those may be taken by any user with read access we can't make them world-readable. */
144 xsprintf ( path1
, "/run/systemd/dynamic-uid/direct:" UID_FMT
, uid
);
145 if ( unlink ( path1
) < 0 && errno
!= ENOENT
)
148 if ( b
&& symlink ( name
, path1
) < 0 ) {
149 k
= log_warning_errno ( errno
, "Failed to symlink \" %s \" : %m" , path1
);
154 path2
= strjoina ( "/run/systemd/dynamic-uid/direct:" , name
);
155 if ( unlink ( path2
) < 0 && errno
!= ENOENT
) {
161 if ( b
&& symlink ( path1
+ STRLEN ( "/run/systemd/dynamic-uid/direct:" ), path2
) < 0 ) {
162 k
= log_warning_errno ( errno
, "Failed to symlink \" %s \" : %m" , path2
);
170 static int pick_uid ( char ** suggested_paths
, const char * name
, uid_t
* ret_uid
) {
172 /* Find a suitable free UID. We use the following strategy to find a suitable UID:
174 * 1. Initially, we try to read the UID of a number of specified paths. If any of these UIDs works, we use
175 * them. We use in order to increase the chance of UID reuse, if StateDirectory=, CacheDirectory= or
176 * LogDirectory= are used, as reusing the UID these directories are owned by saves us from having to
177 * recursively chown() them to new users.
179 * 2. If that didn't yield a currently unused UID, we hash the user name, and try to use that. This should be
180 * pretty good, as the use ris by default derived from the unit name, and hence the same service and same
181 * user should usually get the same UID as long as our hashing doesn't clash.
183 * 3. Finally, if that didn't work, we randomly pick UIDs, until we find one that is empty.
185 * Since the dynamic UID space is relatively small we'll stop trying after 100 iterations, giving up. */
188 PHASE_SUGGESTED
, /* the first phase, reusing directory ownership UIDs */
189 PHASE_HASHED
, /* the second phase, deriving a UID from the username by hashing */
190 PHASE_RANDOM
, /* the last phase, randomly picking UIDs */
191 } phase
= PHASE_SUGGESTED
;
193 static const uint8_t hash_key
[] = {
194 0x37 , 0x53 , 0x7e , 0x31 , 0xcf , 0xce , 0x48 , 0xf5 ,
195 0x8a , 0xbb , 0x39 , 0x57 , 0x8d , 0xd9 , 0xec , 0x59
198 unsigned n_tries
= 100 , current_suggested
= 0 ;
201 ( void ) mkdir ( "/run/systemd/dynamic-uid" , 0755 );
204 char lock_path
[ STRLEN ( "/run/systemd/dynamic-uid/" ) + DECIMAL_STR_MAX ( uid_t
) + 1 ];
205 _cleanup_close_
int lock_fd
= - 1 ;
209 if (-- n_tries
<= 0 ) /* Give up retrying eventually */
214 case PHASE_SUGGESTED
: {
217 if (! suggested_paths
|| ! suggested_paths
[ current_suggested
]) {
218 /* We reached the end of the suggested paths list, let's try by hashing the name */
219 phase
= PHASE_HASHED
;
223 if ( stat ( suggested_paths
[ current_suggested
++], & st
) < 0 )
224 continue ; /* We can't read the UID of this path, but that doesn't matter, just try the next */
226 candidate
= st
. st_uid
;
231 /* A static user by this name does not exist yet. Let's find a free ID then, and use that. We
232 * start with a UID generated as hash from the user name. */
233 candidate
= UID_CLAMP_INTO_RANGE ( siphash24 ( name
, strlen ( name
), hash_key
));
235 /* If this one fails, we should proceed with random tries */
236 phase
= PHASE_RANDOM
;
241 /* Pick another random UID, and see if that works for us. */
242 random_bytes (& candidate
, sizeof ( candidate
));
243 candidate
= UID_CLAMP_INTO_RANGE ( candidate
);
247 assert_not_reached ( "unknown phase" );
250 /* Make sure whatever we picked here actually is in the right range */
251 if (! uid_is_dynamic ( candidate
))
254 xsprintf ( lock_path
, "/run/systemd/dynamic-uid/" UID_FMT
, candidate
);
259 lock_fd
= open ( lock_path
, O_CREAT
| O_RDWR
| O_NOFOLLOW
| O_CLOEXEC
| O_NOCTTY
, 0600 );
263 r
= flock ( lock_fd
, LOCK_EX
| LOCK_NB
); /* Try to get a BSD file lock on the UID lock file */
265 if ( IN_SET ( errno
, EBUSY
, EAGAIN
))
266 goto next
; /* already in use */
271 if ( fstat ( lock_fd
, & st
) < 0 )
276 /* Oh, bummer, we got the lock, but the file was unlinked between the time we opened it and
277 * got the lock. Close it, and try again. */
278 lock_fd
= safe_close ( lock_fd
);
281 /* Some superficial check whether this UID/GID might already be taken by some static user */
282 if ( getpwuid ( candidate
) ||
283 getgrgid (( gid_t
) candidate
) ||
284 search_ipc ( candidate
, ( gid_t
) candidate
) != 0 ) {
285 ( void ) unlink ( lock_path
);
289 /* Let's store the user name in the lock file, so that we can use it for looking up the username for a UID */
292 IOVEC_INIT_STRING ( name
),
293 IOVEC_INIT (( char [ 1 ]) { ' \n ' }, 1 ),
297 ( void ) unlink ( lock_path
);
301 ( void ) ftruncate ( lock_fd
, l
);
302 ( void ) make_uid_symlinks ( candidate
, name
, true ); /* also add direct lookup symlinks */
304 * ret_uid
= candidate
;
305 return TAKE_FD ( lock_fd
);
312 static int dynamic_user_pop ( DynamicUser
* d
, uid_t
* ret_uid
, int * ret_lock_fd
) {
313 uid_t uid
= UID_INVALID
;
314 struct iovec iov
= IOVEC_INIT (& uid
, sizeof ( uid
));
316 struct cmsghdr cmsghdr
;
317 uint8_t buf
[ CMSG_SPACE ( sizeof ( int ))];
320 . msg_control
= & control
,
321 . msg_controllen
= sizeof ( control
),
325 struct cmsghdr
* cmsg
;
334 /* Read the UID and lock fd that is stored in the storage AF_UNIX socket. This should be called with the lock
335 * on the socket taken. */
337 k
= recvmsg ( d
-> storage_socket
[ 0 ], & mh
, MSG_DONTWAIT
| MSG_NOSIGNAL
| MSG_CMSG_CLOEXEC
);
341 cmsg
= cmsg_find (& mh
, SOL_SOCKET
, SCM_RIGHTS
, CMSG_LEN ( sizeof ( int )));
343 lock_fd
= *( int *) CMSG_DATA ( cmsg
);
345 cmsg_close_all (& mh
); /* just in case... */
348 * ret_lock_fd
= lock_fd
;
353 static int dynamic_user_push ( DynamicUser
* d
, uid_t uid
, int lock_fd
) {
354 struct iovec iov
= IOVEC_INIT (& uid
, sizeof ( uid
));
356 struct cmsghdr cmsghdr
;
357 uint8_t buf
[ CMSG_SPACE ( sizeof ( int ))];
360 . msg_control
= & control
,
361 . msg_controllen
= sizeof ( control
),
369 /* Store the UID and lock_fd in the storage socket. This should be called with the socket pair lock taken. */
372 struct cmsghdr
* cmsg
;
374 cmsg
= CMSG_FIRSTHDR (& mh
);
375 cmsg
-> cmsg_level
= SOL_SOCKET
;
376 cmsg
-> cmsg_type
= SCM_RIGHTS
;
377 cmsg
-> cmsg_len
= CMSG_LEN ( sizeof ( int ));
378 memcpy ( CMSG_DATA ( cmsg
), & lock_fd
, sizeof ( int ));
380 mh
. msg_controllen
= CMSG_SPACE ( sizeof ( int ));
382 mh
. msg_control
= NULL
;
383 mh
. msg_controllen
= 0 ;
386 k
= sendmsg ( d
-> storage_socket
[ 1 ], & mh
, MSG_DONTWAIT
| MSG_NOSIGNAL
);
393 static void unlink_uid_lock ( int lock_fd
, uid_t uid
, const char * name
) {
394 char lock_path
[ STRLEN ( "/run/systemd/dynamic-uid/" ) + DECIMAL_STR_MAX ( uid_t
) + 1 ];
399 xsprintf ( lock_path
, "/run/systemd/dynamic-uid/" UID_FMT
, uid
);
400 ( void ) unlink ( lock_path
);
402 ( void ) make_uid_symlinks ( uid
, name
, false ); /* remove direct lookup symlinks */
405 static int lockfp ( int fd
, int * fd_lock
) {
406 if ( lockf ( fd
, F_LOCK
, 0 ) < 0 )
412 static void unlockfp ( int * fd_lock
) {
415 lockf (* fd_lock
, F_ULOCK
, 0 );
419 static int dynamic_user_realize (
421 char ** suggested_dirs
,
422 uid_t
* ret_uid
, gid_t
* ret_gid
,
425 _cleanup_ ( unlockfp
) int storage_socket0_lock
= - 1 ;
426 _cleanup_close_
int uid_lock_fd
= - 1 ;
427 _cleanup_close_
int etc_passwd_lock_fd
= - 1 ;
428 uid_t num
= UID_INVALID
; /* a uid if is_user, and a gid otherwise */
429 gid_t gid
= GID_INVALID
; /* a gid if is_user, ignored otherwise */
433 assert ( is_user
== !! ret_uid
);
436 /* Acquire a UID for the user name. This will allocate a UID for the user name if the user doesn't exist
437 * yet. If it already exists its existing UID/GID will be reused. */
439 r
= lockfp ( d
-> storage_socket
[ 0 ], & storage_socket0_lock
);
443 r
= dynamic_user_pop ( d
, & num
, & uid_lock_fd
);
451 /* OK, nothing stored yet, let's try to find something useful. While we are working on this release the
452 * lock however, so that nobody else blocks on our NSS lookups. */
453 unlockfp (& storage_socket0_lock
);
455 /* Let's see if a proper, static user or group by this name exists. Try to take the lock on
456 * /etc/passwd, if that fails with EROFS then /etc is read-only. In that case it's fine if we don't
457 * take the lock, given that users can't be added there anyway in this case. */
458 etc_passwd_lock_fd
= take_etc_passwd_lock ( NULL
);
459 if ( etc_passwd_lock_fd
< 0 && etc_passwd_lock_fd
!= - EROFS
)
460 return etc_passwd_lock_fd
;
462 /* First, let's parse this as numeric UID */
463 r
= parse_uid ( d
-> name
, & num
);
469 /* OK, this is not a numeric UID. Let's see if there's a user by this name */
470 p
= getpwnam ( d
-> name
);
475 /* if the user does not exist but the group with the same name exists, refuse operation */
476 g
= getgrnam ( d
-> name
);
481 /* Let's see if there's a group by this name */
482 g
= getgrnam ( d
-> name
);
484 num
= ( uid_t
) g
-> gr_gid
;
486 /* if the group does not exist but the user with the same name exists, refuse operation */
487 p
= getpwnam ( d
-> name
);
494 if ( num
== UID_INVALID
) {
495 /* No static UID assigned yet, excellent. Let's pick a new dynamic one, and lock it. */
497 uid_lock_fd
= pick_uid ( suggested_dirs
, d
-> name
, & num
);
502 /* So, we found a working UID/lock combination. Let's see if we actually still need it. */
503 r
= lockfp ( d
-> storage_socket
[ 0 ], & storage_socket0_lock
);
505 unlink_uid_lock ( uid_lock_fd
, num
, d
-> name
);
509 r
= dynamic_user_pop ( d
, & new_uid
, & new_uid_lock_fd
);
512 /* OK, something bad happened, let's get rid of the bits we acquired. */
513 unlink_uid_lock ( uid_lock_fd
, num
, d
-> name
);
517 /* Great! Nothing is stored here, still. Store our newly acquired data. */
519 /* Hmm, so as it appears there's now something stored in the storage socket. Throw away what we
520 * acquired, and use what's stored now. */
522 unlink_uid_lock ( uid_lock_fd
, num
, d
-> name
);
523 safe_close ( uid_lock_fd
);
526 uid_lock_fd
= new_uid_lock_fd
;
530 /* If the UID/GID was already allocated dynamically, push the data we popped out back in. If it was already
531 * allocated statically, push the UID back too, but do not push the lock fd in. If we allocated the UID
532 * dynamically right here, push that in along with the lock fd for it. */
533 r
= dynamic_user_push ( d
, num
, uid_lock_fd
);
539 * ret_gid
= gid
!= GID_INVALID
? gid
: num
;
546 int dynamic_user_current ( DynamicUser
* d
, uid_t
* ret
) {
547 _cleanup_ ( unlockfp
) int storage_socket0_lock
= - 1 ;
548 _cleanup_close_
int lock_fd
= - 1 ;
555 /* Get the currently assigned UID for the user, if there's any. This simply pops the data from the storage socket, and pushes it back in right-away. */
557 r
= lockfp ( d
-> storage_socket
[ 0 ], & storage_socket0_lock
);
561 r
= dynamic_user_pop ( d
, & uid
, & lock_fd
);
565 r
= dynamic_user_push ( d
, uid
, lock_fd
);
573 static DynamicUser
* dynamic_user_ref ( DynamicUser
* d
) {
577 assert ( d
-> n_ref
> 0 );
583 static DynamicUser
* dynamic_user_unref ( DynamicUser
* d
) {
587 /* Note that this doesn't actually release any resources itself. If a dynamic user should be fully destroyed
588 * and its UID released, use dynamic_user_destroy() instead. NB: the dynamic user table may contain entries
589 * with no references, which is commonly the case right before a daemon reload. */
591 assert ( d
-> n_ref
> 0 );
597 static int dynamic_user_close ( DynamicUser
* d
) {
598 _cleanup_ ( unlockfp
) int storage_socket0_lock
= - 1 ;
599 _cleanup_close_
int lock_fd
= - 1 ;
603 /* Release the user ID, by releasing the lock on it, and emptying the storage socket. After this the user is
604 * unrealized again, much like it was after it the DynamicUser object was first allocated. */
606 r
= lockfp ( d
-> storage_socket
[ 0 ], & storage_socket0_lock
);
610 r
= dynamic_user_pop ( d
, & uid
, & lock_fd
);
612 /* User wasn't realized yet, nothing to do. */
617 /* This dynamic user was realized and dynamically allocated. In this case, let's remove the lock file. */
618 unlink_uid_lock ( lock_fd
, uid
, d
-> name
);
622 static DynamicUser
* dynamic_user_destroy ( DynamicUser
* d
) {
626 /* Drop a reference to a DynamicUser object, and destroy the user completely if this was the last
627 * reference. This is called whenever a service is shut down and wants its dynamic UID gone. Note that
628 * dynamic_user_unref() is what is called whenever a service is simply freed, for example during a reload
629 * cycle, where the dynamic users should not be destroyed, but our datastructures should. */
631 dynamic_user_unref ( d
);
636 ( void ) dynamic_user_close ( d
);
637 return dynamic_user_free ( d
);
640 int dynamic_user_serialize ( Manager
* m
, FILE * f
, FDSet
* fds
) {
648 /* Dump the dynamic user database into the manager serialization, to deal with daemon reloads. */
650 HASHMAP_FOREACH ( d
, m
-> dynamic_users
, i
) {
653 copy0
= fdset_put_dup ( fds
, d
-> storage_socket
[ 0 ]);
657 copy1
= fdset_put_dup ( fds
, d
-> storage_socket
[ 1 ]);
661 fprintf ( f
, "dynamic-user=%s %i %i \n " , d
-> name
, copy0
, copy1
);
667 void dynamic_user_deserialize_one ( Manager
* m
, const char * value
, FDSet
* fds
) {
668 _cleanup_free_
char * name
= NULL
, * s0
= NULL
, * s1
= NULL
;
675 /* Parse the serialization again, after a daemon reload */
677 r
= extract_many_words (& value
, NULL
, 0 , & name
, & s0
, & s1
, NULL
);
678 if ( r
!= 3 || ! isempty ( value
)) {
679 log_debug ( "Unable to parse dynamic user line." );
683 if ( safe_atoi ( s0
, & fd0
) < 0 || ! fdset_contains ( fds
, fd0
)) {
684 log_debug ( "Unable to process dynamic user fd specification." );
688 if ( safe_atoi ( s1
, & fd1
) < 0 || ! fdset_contains ( fds
, fd1
)) {
689 log_debug ( "Unable to process dynamic user fd specification." );
693 r
= dynamic_user_add ( m
, name
, ( int []) { fd0
, fd1
}, NULL
);
695 log_debug_errno ( r
, "Failed to add dynamic user: %m" );
699 ( void ) fdset_remove ( fds
, fd0
);
700 ( void ) fdset_remove ( fds
, fd1
);
703 void dynamic_user_vacuum ( Manager
* m
, bool close_user
) {
709 /* Empty the dynamic user database, optionally cleaning up orphaned dynamic users, i.e. destroy and free users
710 * to which no reference exist. This is called after a daemon reload finished, in order to destroy users which
711 * might not be referenced anymore. */
713 HASHMAP_FOREACH ( d
, m
-> dynamic_users
, i
) {
718 log_debug ( "Removing orphaned dynamic user %s" , d
-> name
);
719 ( void ) dynamic_user_close ( d
);
722 dynamic_user_free ( d
);
726 int dynamic_user_lookup_uid ( Manager
* m
, uid_t uid
, char ** ret
) {
727 char lock_path
[ STRLEN ( "/run/systemd/dynamic-uid/" ) + DECIMAL_STR_MAX ( uid_t
) + 1 ];
728 _cleanup_free_
char * user
= NULL
;
735 /* A friendly way to translate a dynamic user's UID into a name. */
736 if (! uid_is_dynamic ( uid
))
739 xsprintf ( lock_path
, "/run/systemd/dynamic-uid/" UID_FMT
, uid
);
740 r
= read_one_line_file ( lock_path
, & user
);
746 /* The lock file might be stale, hence let's verify the data before we return it */
747 r
= dynamic_user_lookup_name ( m
, user
, & check_uid
);
750 if ( check_uid
!= uid
) /* lock file doesn't match our own idea */
753 * ret
= TAKE_PTR ( user
);
758 int dynamic_user_lookup_name ( Manager
* m
, const char * name
, uid_t
* ret
) {
766 /* A friendly call for translating a dynamic user's name into its UID */
768 d
= hashmap_get ( m
-> dynamic_users
, name
);
772 r
= dynamic_user_current ( d
, ret
);
773 if ( r
== - EAGAIN
) /* not realized yet? */
779 int dynamic_creds_acquire ( DynamicCreds
* creds
, Manager
* m
, const char * user
, const char * group
) {
780 bool acquired
= false ;
786 /* A DynamicUser object encapsulates an allocation of both a UID and a GID for a specific name. However, some
787 * services use different user and groups. For cases like that there's DynamicCreds containing a pair of user
788 * and group. This call allocates a pair. */
790 if (! creds
-> user
&& user
) {
791 r
= dynamic_user_acquire ( m
, user
, & creds
-> user
);
800 if ( creds
-> user
&& (! group
|| streq_ptr ( user
, group
)))
801 creds
-> group
= dynamic_user_ref ( creds
-> user
);
803 r
= dynamic_user_acquire ( m
, group
, & creds
-> group
);
806 creds
-> user
= dynamic_user_unref ( creds
-> user
);
815 int dynamic_creds_realize ( DynamicCreds
* creds
, char ** suggested_paths
, uid_t
* uid
, gid_t
* gid
) {
816 uid_t u
= UID_INVALID
;
817 gid_t g
= GID_INVALID
;
824 /* Realize both the referenced user and group */
827 r
= dynamic_user_realize ( creds
-> user
, suggested_paths
, & u
, & g
, true );
832 if ( creds
-> group
&& creds
-> group
!= creds
-> user
) {
833 r
= dynamic_user_realize ( creds
-> group
, suggested_paths
, NULL
, & g
, false );
843 void dynamic_creds_unref ( DynamicCreds
* creds
) {
846 creds
-> user
= dynamic_user_unref ( creds
-> user
);
847 creds
-> group
= dynamic_user_unref ( creds
-> group
);
850 void dynamic_creds_destroy ( DynamicCreds
* creds
) {
853 creds
-> user
= dynamic_user_destroy ( creds
-> user
);
854 creds
-> group
= dynamic_user_destroy ( creds
-> group
);