2 * Handle passing Access Control Lists between systems.
4 * Copyright (C) 1996 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2006 Wayne Davison
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 3 of the License, or
11 * (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, visit the http://fsf.org website.
23 #include "lib/sysacls.h"
31 extern int orig_umask;
32 extern int numeric_ids;
33 extern int inc_recurse;
35 /* Flags used to indicate what items are being transmitted for an entry. */
36 #define XMIT_USER_OBJ (1<<0)
37 #define XMIT_GROUP_OBJ (1<<1)
38 #define XMIT_MASK_OBJ (1<<2)
39 #define XMIT_OTHER_OBJ (1<<3)
40 #define XMIT_NAME_LIST (1<<4)
42 #define NO_ENTRY ((uchar)0x80) /* Default value of a NON-name-list entry. */
44 #define NAME_IS_USER (1u<<31) /* Bit used only on a name-list entry. */
46 /* When we send the access bits over the wire, we shift them 2 bits to the
47 * left and use the lower 2 bits as flags (relevant only to a name entry).
48 * This makes the protocol more efficient than sending a value that would
49 * be likely to have its hightest bits set. */
50 #define XFLAG_NAME_FOLLOWS 0x0001u
51 #define XFLAG_NAME_IS_USER 0x0002u
53 /* === ACL structures === */
70 typedef struct rsync_acl {
72 /* These will be NO_ENTRY if there's no such entry. */
84 static const rsync_acl empty_rsync_acl = {
85 {NULL, 0}, NO_ENTRY, NO_ENTRY, NO_ENTRY, NO_ENTRY
88 static item_list access_acl_list = EMPTY_ITEM_LIST;
89 static item_list default_acl_list = EMPTY_ITEM_LIST;
91 /* === Calculations on ACL types === */
93 static const char *str_acl_type(SMB_ACL_TYPE_T type)
96 case SMB_ACL_TYPE_ACCESS:
98 return "ACL_TYPE_EXTENDED";
100 return "ACL_TYPE_ACCESS";
102 case SMB_ACL_TYPE_DEFAULT:
103 return "ACL_TYPE_DEFAULT";
105 return "unknown ACL type!";
108 static int calc_sacl_entries(const rsync_acl *racl)
110 /* A System ACL always gets user/group/other permission entries. */
111 return racl->names.count
112 #ifdef ACLS_NEED_MASK
115 + (racl->mask_obj != NO_ENTRY) + 3;
119 /* Extracts and returns the permission bits from the ACL. This cannot be
120 * called on an rsync_acl that has NO_ENTRY in any spot but the mask. */
121 static int rsync_acl_get_perms(const rsync_acl *racl)
123 return (racl->user_obj << 6)
124 + ((racl->mask_obj != NO_ENTRY ? racl->mask_obj : racl->group_obj) << 3)
128 /* Removes the permission-bit entries from the ACL because these
129 * can be reconstructed from the file's mode. */
130 static void rsync_acl_strip_perms(rsync_acl *racl)
132 racl->user_obj = NO_ENTRY;
133 if (racl->mask_obj == NO_ENTRY)
134 racl->group_obj = NO_ENTRY;
136 if (racl->group_obj == racl->mask_obj)
137 racl->group_obj = NO_ENTRY;
138 racl->mask_obj = NO_ENTRY;
140 racl->other_obj = NO_ENTRY;
143 /* Given an empty rsync_acl, fake up the permission bits. */
144 static void rsync_acl_fake_perms(rsync_acl *racl, mode_t mode)
146 racl->user_obj = (mode >> 6) & 7;
147 racl->group_obj = (mode >> 3) & 7;
148 racl->other_obj = mode & 7;
151 /* === Rsync ACL functions === */
153 static rsync_acl *create_racl(void)
155 rsync_acl *racl = new(rsync_acl);
158 out_of_memory("create_racl");
159 *racl = empty_rsync_acl;
164 static BOOL ida_entries_equal(const ida_entries *ial1, const ida_entries *ial2)
166 id_access *ida1, *ida2;
167 int count = ial1->count;
168 if (count != ial2->count)
172 for (; count--; ida1++, ida2++) {
173 if (ida1->access != ida2->access || ida1->id != ida2->id)
179 static BOOL rsync_acl_equal(const rsync_acl *racl1, const rsync_acl *racl2)
181 return racl1->user_obj == racl2->user_obj
182 && racl1->group_obj == racl2->group_obj
183 && racl1->mask_obj == racl2->mask_obj
184 && racl1->other_obj == racl2->other_obj
185 && ida_entries_equal(&racl1->names, &racl2->names);
188 /* Are the extended (non-permission-bit) entries equal? If so, the rest of
189 * the ACL will be handled by the normal mode-preservation code. This is
190 * only meaningful for access ACLs! Note: the 1st arg is a fully-populated
191 * rsync_acl, but the 2nd parameter can be a condensed rsync_acl, which means
192 * that it might have several of its permission objects set to NO_ENTRY. */
193 static BOOL rsync_acl_equal_enough(const rsync_acl *racl1,
194 const rsync_acl *racl2, mode_t m)
196 if ((racl1->mask_obj ^ racl2->mask_obj) & NO_ENTRY)
197 return False; /* One has a mask and the other doesn't */
199 /* When there's a mask, the group_obj becomes an extended entry. */
200 if (racl1->mask_obj != NO_ENTRY) {
201 /* A condensed rsync_acl with a mask can only have no
202 * group_obj when it was identical to the mask. This
203 * means that it was also identical to the group attrs
205 if (racl2->group_obj == NO_ENTRY) {
206 if (racl1->group_obj != ((m >> 3) & 7))
208 } else if (racl1->group_obj != racl2->group_obj)
211 return ida_entries_equal(&racl1->names, &racl2->names);
214 static void rsync_acl_free(rsync_acl *racl)
216 if (racl->names.idas)
217 free(racl->names.idas);
218 *racl = empty_rsync_acl;
221 void free_acl(stat_x *sxp)
224 rsync_acl_free(sxp->acc_acl);
229 rsync_acl_free(sxp->def_acl);
235 #ifdef SMB_ACL_NEED_SORT
236 static int id_access_sorter(const void *r1, const void *r2)
238 id_access *ida1 = (id_access *)r1;
239 id_access *ida2 = (id_access *)r2;
240 id_t rid1 = ida1->id, rid2 = ida2->id;
241 if ((ida1->access ^ ida2->access) & NAME_IS_USER)
242 return ida1->access & NAME_IS_USER ? -1 : 1;
243 return rid1 == rid2 ? 0 : rid1 < rid2 ? -1 : 1;
247 /* === System ACLs === */
249 /* Unpack system ACL -> rsync ACL verbatim. Return whether we succeeded. */
250 static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
252 static item_list temp_ida_list = EMPTY_ITEM_LIST;
253 SMB_ACL_ENTRY_T entry;
257 errfun = "sys_acl_get_entry";
258 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
260 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
261 SMB_ACL_TAG_T tag_type;
265 if ((rc = sys_acl_get_info(entry, &tag_type, &access, &g_u_id)) != 0) {
266 errfun = "sys_acl_get_info";
269 /* continue == done with entry; break == store in temporary ida list */
271 #ifndef HAVE_OSX_ACLS
272 case SMB_ACL_USER_OBJ:
273 if (racl->user_obj == NO_ENTRY)
274 racl->user_obj = access;
276 rprintf(FINFO, "unpack_smb_acl: warning: duplicate USER_OBJ entry ignored\n");
278 case SMB_ACL_GROUP_OBJ:
279 if (racl->group_obj == NO_ENTRY)
280 racl->group_obj = access;
282 rprintf(FINFO, "unpack_smb_acl: warning: duplicate GROUP_OBJ entry ignored\n");
285 if (racl->mask_obj == NO_ENTRY)
286 racl->mask_obj = access;
288 rprintf(FINFO, "unpack_smb_acl: warning: duplicate MASK entry ignored\n");
291 if (racl->other_obj == NO_ENTRY)
292 racl->other_obj = access;
294 rprintf(FINFO, "unpack_smb_acl: warning: duplicate OTHER entry ignored\n");
298 access |= NAME_IS_USER;
303 rprintf(FINFO, "unpack_smb_acl: warning: entry with unrecognized tag type ignored\n");
306 ida = EXPAND_ITEM_LIST(&temp_ida_list, id_access, -10);
308 ida->access = access;
311 rsyserr(FERROR_XFER, errno, "unpack_smb_acl: %s()", errfun);
312 rsync_acl_free(racl);
316 /* Transfer the count id_access items out of the temp_ida_list
317 * into the names ida_entries list in racl. */
318 if (temp_ida_list.count) {
319 #ifdef SMB_ACL_NEED_SORT
320 if (temp_ida_list.count > 1) {
321 qsort(temp_ida_list.items, temp_ida_list.count,
322 sizeof (id_access), id_access_sorter);
325 if (!(racl->names.idas = new_array(id_access, temp_ida_list.count)))
326 out_of_memory("unpack_smb_acl");
327 memcpy(racl->names.idas, temp_ida_list.items,
328 temp_ida_list.count * sizeof (id_access));
330 racl->names.idas = NULL;
332 racl->names.count = temp_ida_list.count;
334 /* Truncate the temporary list now that its idas have been saved. */
335 temp_ida_list.count = 0;
337 #ifdef ACLS_NEED_MASK
338 if (!racl->names.count && racl->mask_obj != NO_ENTRY) {
339 /* Throw away a superfluous mask, but mask off the
340 * group perms with it first. */
341 racl->group_obj &= racl->mask_obj;
342 racl->mask_obj = NO_ENTRY;
349 /* Synactic sugar for system calls */
351 #define CALL_OR_ERROR(func,args,str) \
359 #define COE(func,args) CALL_OR_ERROR(func,args,#func)
360 #define COE2(func,args) CALL_OR_ERROR(func,args,NULL)
362 #ifndef HAVE_OSX_ACLS
363 /* Store the permissions in the system ACL entry. */
364 static int store_access_in_entry(uint32 access, SMB_ACL_ENTRY_T entry)
366 if (sys_acl_set_access_bits(entry, access)) {
367 rsyserr(FERROR_XFER, errno, "store_access_in_entry sys_acl_set_access_bits()");
374 /* Pack rsync ACL -> system ACL verbatim. Return whether we succeeded. */
375 static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
377 #ifdef ACLS_NEED_MASK
382 const char *errfun = NULL;
383 SMB_ACL_ENTRY_T entry;
385 if (!(*smb_acl = sys_acl_init(calc_sacl_entries(racl)))) {
386 rsyserr(FERROR_XFER, errno, "pack_smb_acl: sys_acl_init()");
390 #ifndef HAVE_OSX_ACLS
391 COE( sys_acl_create_entry,(smb_acl, &entry) );
392 COE( sys_acl_set_info,(entry, SMB_ACL_USER_OBJ, racl->user_obj & ~NO_ENTRY, 0) );
395 for (ida = racl->names.idas, count = racl->names.count; count; ida++, count--) {
396 #ifdef SMB_ACL_NEED_SORT
397 if (!(ida->access & NAME_IS_USER))
400 COE( sys_acl_create_entry,(smb_acl, &entry) );
401 COE( sys_acl_set_info,
403 ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP,
404 ida->access & ~NAME_IS_USER, ida->id) );
407 #ifndef HAVE_OSX_ACLS
408 COE( sys_acl_create_entry,(smb_acl, &entry) );
409 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP_OBJ, racl->group_obj & ~NO_ENTRY, 0) );
411 #ifdef SMB_ACL_NEED_SORT
412 for ( ; count; ida++, count--) {
413 COE( sys_acl_create_entry,(smb_acl, &entry) );
414 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP, ida->access, ida->id) );
418 #ifdef ACLS_NEED_MASK
419 mask_bits = racl->mask_obj == NO_ENTRY ? racl->group_obj & ~NO_ENTRY : racl->mask_obj;
420 COE( sys_acl_create_entry,(smb_acl, &entry) );
421 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, NULL) );
423 if (racl->mask_obj != NO_ENTRY) {
424 COE( sys_acl_create_entry,(smb_acl, &entry) );
425 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, racl->mask_obj, 0) );
429 COE( sys_acl_create_entry,(smb_acl, &entry) );
430 COE( sys_acl_set_info,(entry, SMB_ACL_OTHER, racl->other_obj & ~NO_ENTRY, 0) );
434 if (sys_acl_valid(*smb_acl) < 0)
435 rprintf(FERROR_XFER, "pack_smb_acl: warning: system says the ACL I packed is invalid\n");
442 rsyserr(FERROR_XFER, errno, "pack_smb_acl %s()", errfun);
444 sys_acl_free_acl(*smb_acl);
448 static int find_matching_rsync_acl(const rsync_acl *racl, SMB_ACL_TYPE_T type,
449 const item_list *racl_list)
451 static int access_match = -1, default_match = -1;
452 int *match = type == SMB_ACL_TYPE_ACCESS ? &access_match : &default_match;
453 size_t count = racl_list->count;
455 /* If this is the first time through or we didn't match the last
456 * time, then start at the end of the list, which should be the
457 * best place to start hunting. */
459 *match = racl_list->count - 1;
461 rsync_acl *base = racl_list->items;
462 if (rsync_acl_equal(base + *match, racl))
465 *match = racl_list->count - 1;
472 static int get_rsync_acl(const char *fname, rsync_acl *racl,
473 SMB_ACL_TYPE_T type, mode_t mode)
477 #ifdef SUPPORT_XATTRS
478 /* --fake-super support: load ACLs from an xattr. */
484 if ((buf = get_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, &len)) == NULL)
486 cnt = (len - 4*4) / (4+4);
487 if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4) {
492 racl->user_obj = IVAL(buf, 0);
493 racl->group_obj = IVAL(buf, 4);
494 racl->mask_obj = IVAL(buf, 8);
495 racl->other_obj = IVAL(buf, 12);
498 char *bp = buf + 4*4;
500 if (!(ida = racl->names.idas = new_array(id_access, cnt)))
501 out_of_memory("get_rsync_acl");
502 racl->names.count = cnt;
503 for ( ; cnt--; ida++, bp += 4+4) {
504 ida->id = IVAL(bp, 0);
505 ida->access = IVAL(bp, 4);
513 if ((sacl = sys_acl_get_file(fname, type)) != 0) {
514 BOOL ok = unpack_smb_acl(sacl, racl);
516 sys_acl_free_acl(sacl);
520 } else if (no_acl_syscall_error(errno)) {
521 /* ACLs are not supported, so pretend we have a basic ACL. */
522 if (type == SMB_ACL_TYPE_ACCESS)
523 rsync_acl_fake_perms(racl, mode);
525 rsyserr(FERROR_XFER, errno, "get_acl: sys_acl_get_file(%s, %s)",
526 fname, str_acl_type(type));
533 /* Return the Access Control List for the given filename. */
534 int get_acl(const char *fname, stat_x *sxp)
536 sxp->acc_acl = create_racl();
537 if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS,
538 sxp->st.st_mode) < 0) {
543 if (S_ISDIR(sxp->st.st_mode)) {
544 sxp->def_acl = create_racl();
545 if (get_rsync_acl(fname, sxp->def_acl, SMB_ACL_TYPE_DEFAULT,
546 sxp->st.st_mode) < 0) {
555 /* === Send functions === */
557 /* Send the ida list over the file descriptor. */
558 static void send_ida_entries(const ida_entries *idal, int f)
561 size_t count = idal->count;
563 write_varint(f, idal->count);
565 for (ida = idal->idas; count--; ida++) {
566 uint32 xbits = ida->access << 2;
568 if (ida->access & NAME_IS_USER) {
569 xbits |= XFLAG_NAME_IS_USER;
570 name = add_uid(ida->id);
572 name = add_gid(ida->id);
573 write_varint(f, ida->id);
574 if (inc_recurse && name) {
575 int len = strlen(name);
576 write_varint(f, xbits | XFLAG_NAME_FOLLOWS);
578 write_buf(f, name, len);
580 write_varint(f, xbits);
584 static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type,
585 item_list *racl_list, int f)
587 int ndx = find_matching_rsync_acl(racl, type, racl_list);
589 /* Send 0 (-1 + 1) to indicate that literal ACL data follows. */
590 write_varint(f, ndx + 1);
593 rsync_acl *new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000);
596 if (racl->user_obj != NO_ENTRY)
597 flags |= XMIT_USER_OBJ;
598 if (racl->group_obj != NO_ENTRY)
599 flags |= XMIT_GROUP_OBJ;
600 if (racl->mask_obj != NO_ENTRY)
601 flags |= XMIT_MASK_OBJ;
602 if (racl->other_obj != NO_ENTRY)
603 flags |= XMIT_OTHER_OBJ;
604 if (racl->names.count)
605 flags |= XMIT_NAME_LIST;
607 write_byte(f, flags);
609 if (flags & XMIT_USER_OBJ)
610 write_varint(f, racl->user_obj);
611 if (flags & XMIT_GROUP_OBJ)
612 write_varint(f, racl->group_obj);
613 if (flags & XMIT_MASK_OBJ)
614 write_varint(f, racl->mask_obj);
615 if (flags & XMIT_OTHER_OBJ)
616 write_varint(f, racl->other_obj);
617 if (flags & XMIT_NAME_LIST)
618 send_ida_entries(&racl->names, f);
620 /* Give the allocated data to the new list object. */
622 *racl = empty_rsync_acl;
626 /* Send the ACL from the stat_x structure down the indicated file descriptor.
627 * This also frees the ACL data. */
628 void send_acl(stat_x *sxp, int f)
631 sxp->acc_acl = create_racl();
632 rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode);
634 /* Avoid sending values that can be inferred from other data. */
635 rsync_acl_strip_perms(sxp->acc_acl);
637 send_rsync_acl(sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list, f);
639 if (S_ISDIR(sxp->st.st_mode)) {
641 sxp->def_acl = create_racl();
643 send_rsync_acl(sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list, f);
647 /* === Receive functions === */
649 static uint32 recv_acl_access(uchar *name_follows_ptr, int f)
651 uint32 access = read_varint(f);
653 if (name_follows_ptr) {
654 int flags = access & 3;
656 if (am_root >= 0 && access & ~SMB_ACL_VALID_NAME_BITS)
658 if (flags & XFLAG_NAME_FOLLOWS)
659 *name_follows_ptr = 1;
661 *name_follows_ptr = 0;
662 if (flags & XFLAG_NAME_IS_USER)
663 access |= NAME_IS_USER;
664 } else if (am_root >= 0 && access & ~SMB_ACL_VALID_OBJ_BITS) {
666 rprintf(FERROR_XFER, "recv_acl_access: value out of range: %x\n",
668 exit_cleanup(RERR_STREAMIO);
674 static uchar recv_ida_entries(ida_entries *ent, int f)
676 uchar computed_mask_bits = 0;
677 int i, count = read_varint(f);
680 if (!(ent->idas = new_array(id_access, count)))
681 out_of_memory("recv_ida_entries");
687 for (i = 0; i < count; i++) {
689 id_t id = read_varint(f);
690 uint32 access = recv_acl_access(&has_name, f);
693 if (access & NAME_IS_USER)
694 id = recv_user_name(f, id);
696 id = recv_group_name(f, id, NULL);
697 } else if (access & NAME_IS_USER) {
698 if (inc_recurse && am_root && !numeric_ids)
701 if (inc_recurse && (!am_root || !numeric_ids))
702 id = match_gid(id, NULL);
705 ent->idas[i].id = id;
706 ent->idas[i].access = access;
707 computed_mask_bits |= access;
710 return computed_mask_bits & ~NO_ENTRY;
713 static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
715 uchar computed_mask_bits = 0;
718 int ndx = read_varint(f);
720 if (ndx < 0 || (size_t)ndx > racl_list->count) {
721 rprintf(FERROR_XFER, "recv_acl_index: %s ACL index %d > %d\n",
722 str_acl_type(type), ndx, (int)racl_list->count);
723 exit_cleanup(RERR_STREAMIO);
729 ndx = racl_list->count;
730 duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
731 duo_item->racl = empty_rsync_acl;
733 flags = read_byte(f);
735 if (flags & XMIT_USER_OBJ)
736 duo_item->racl.user_obj = recv_acl_access(NULL, f);
737 if (flags & XMIT_GROUP_OBJ)
738 duo_item->racl.group_obj = recv_acl_access(NULL, f);
739 if (flags & XMIT_MASK_OBJ)
740 duo_item->racl.mask_obj = recv_acl_access(NULL, f);
741 if (flags & XMIT_OTHER_OBJ)
742 duo_item->racl.other_obj = recv_acl_access(NULL, f);
743 if (flags & XMIT_NAME_LIST)
744 computed_mask_bits |= recv_ida_entries(&duo_item->racl.names, f);
747 /* If we received a superfluous mask, throw it away. */
748 duo_item->racl.mask_obj = NO_ENTRY;
750 if (!duo_item->racl.names.count) {
751 /* If we received a superfluous mask, throw it away. */
752 if (duo_item->racl.mask_obj != NO_ENTRY) {
753 /* Mask off the group perms with it first. */
754 duo_item->racl.group_obj &= duo_item->racl.mask_obj | NO_ENTRY;
755 duo_item->racl.mask_obj = NO_ENTRY;
757 } else if (duo_item->racl.mask_obj == NO_ENTRY) /* Must be non-empty with lists. */
758 duo_item->racl.mask_obj = (computed_mask_bits | duo_item->racl.group_obj) & ~NO_ENTRY;
761 duo_item->sacl = NULL;
766 /* Receive the ACL info the sender has included for this file-list entry. */
767 void receive_acl(struct file_struct *file, int f)
769 F_ACL(file) = recv_rsync_acl(&access_acl_list, SMB_ACL_TYPE_ACCESS, f);
771 if (S_ISDIR(file->mode))
772 F_DIR_DEFACL(file) = recv_rsync_acl(&default_acl_list, SMB_ACL_TYPE_DEFAULT, f);
775 static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list)
781 else if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) == -1) {
783 ndx = racl_list->count;
784 new_duo = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
785 new_duo->racl = *racl;
786 new_duo->sacl = NULL;
787 *racl = empty_rsync_acl;
793 /* Turn the ACL data in stat_x into cached ACL data, setting the index
794 * values in the file struct. */
795 void cache_acl(struct file_struct *file, stat_x *sxp)
797 F_ACL(file) = cache_rsync_acl(sxp->acc_acl,
798 SMB_ACL_TYPE_ACCESS, &access_acl_list);
800 if (S_ISDIR(sxp->st.st_mode)) {
801 F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl,
802 SMB_ACL_TYPE_DEFAULT, &default_acl_list);
806 #ifndef HAVE_OSX_ACLS
807 static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode, mode_t mode)
809 SMB_ACL_ENTRY_T entry;
814 /* If the sticky bit is going on, it's not safe to allow all
815 * the new ACL to go into effect before it gets set. */
816 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
820 if (mode & S_ISVTX && !(old_mode & S_ISVTX))
823 /* If setuid or setgid is going off, it's not safe to allow all
824 * the new ACL to go into effect before they get cleared. */
825 if ((old_mode & S_ISUID && !(mode & S_ISUID))
826 || (old_mode & S_ISGID && !(mode & S_ISGID)))
831 errfun = "sys_acl_get_entry";
832 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
834 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
835 SMB_ACL_TAG_T tag_type;
836 if ((rc = sys_acl_get_tag_type(entry, &tag_type)) != 0) {
837 errfun = "sys_acl_get_tag_type";
841 case SMB_ACL_USER_OBJ:
842 COE2( store_access_in_entry,((mode >> 6) & 7, entry) );
844 case SMB_ACL_GROUP_OBJ:
845 /* group is only empty when identical to group perms. */
846 if (racl->group_obj != NO_ENTRY)
848 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
851 #ifndef ACLS_NEED_MASK
852 /* mask is only empty when we don't need it. */
853 if (racl->mask_obj == NO_ENTRY)
856 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
859 COE2( store_access_in_entry,(mode & 7, entry) );
866 rsyserr(FERROR_XFER, errno, "change_sacl_perms: %s()",
872 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
873 /* Ensure that chmod() will be called to restore any lost setid bits. */
874 if (old_mode & (S_ISUID | S_ISGID | S_ISVTX)
875 && BITS_EQUAL(old_mode, mode, CHMOD_BITS))
876 old_mode &= ~(S_ISUID | S_ISGID | S_ISVTX);
879 /* Return the mode of the file on disk, as we will set them. */
880 return (old_mode & ~ACCESSPERMS) | (mode & ACCESSPERMS);
884 static int set_rsync_acl(const char *fname, acl_duo *duo_item,
885 SMB_ACL_TYPE_T type, stat_x *sxp, mode_t mode)
887 if (type == SMB_ACL_TYPE_DEFAULT
888 && duo_item->racl.user_obj == NO_ENTRY) {
890 #ifdef SUPPORT_XATTRS
891 /* --fake-super support: delete default ACL from xattrs. */
893 rc = del_def_xattr_acl(fname);
896 rc = sys_acl_delete_def_file(fname);
898 rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_delete_def_file(%s)",
902 #ifdef SUPPORT_XATTRS
903 } else if (am_root < 0) {
904 /* --fake-super support: store ACLs in an xattr. */
905 int cnt = duo_item->racl.names.count;
906 size_t len = 4*4 + cnt * (4+4);
907 char *buf = new_array(char, len);
910 SIVAL(buf, 0, duo_item->racl.user_obj);
911 SIVAL(buf, 4, duo_item->racl.group_obj);
912 SIVAL(buf, 8, duo_item->racl.mask_obj);
913 SIVAL(buf, 12, duo_item->racl.other_obj);
916 char *bp = buf + 4*4;
917 id_access *ida = duo_item->racl.names.idas;
918 for ( ; cnt--; ida++, bp += 4+4) {
919 SIVAL(bp, 0, ida->id);
920 SIVAL(bp, 4, ida->access);
923 rc = set_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, buf, len);
928 mode_t cur_mode = sxp->st.st_mode;
930 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
933 mode = 0; /* eliminate compiler warning */
935 if (type == SMB_ACL_TYPE_ACCESS) {
936 cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl,
938 if (cur_mode == (mode_t)~0)
942 if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) {
943 rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_set_file(%s, %s)",
944 fname, str_acl_type(type));
947 if (type == SMB_ACL_TYPE_ACCESS)
948 sxp->st.st_mode = cur_mode;
954 /* Set ACL on indicated filename.
956 * This sets extended access ACL entries and default ACL. If convenient,
957 * it sets permission bits along with the access ACL and signals having
958 * done so by modifying sxp->st.st_mode.
960 * Returns 1 for unchanged, 0 for changed, -1 for failed. Call this
961 * with fname set to NULL to just check if the ACL is unchanged. */
962 int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp)
968 if (!dry_run && (read_only || list_only)) {
974 if (ndx >= 0 && (size_t)ndx < access_acl_list.count) {
975 acl_duo *duo_item = access_acl_list.items;
978 && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, file->mode);
981 if (!dry_run && fname
982 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS,
983 sxp, file->mode) < 0)
988 if (!S_ISDIR(sxp->st.st_mode))
991 ndx = F_DIR_DEFACL(file);
992 if (ndx >= 0 && (size_t)ndx < default_acl_list.count) {
993 acl_duo *duo_item = default_acl_list.items;
995 eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl);
999 if (!dry_run && fname
1000 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT,
1001 sxp, file->mode) < 0)
1009 /* Non-incremental recursion needs to convert all the received IDs.
1010 * This is done in a single pass after receiving the whole file-list. */
1011 static void match_racl_ids(const item_list *racl_list)
1013 int list_cnt, name_cnt;
1014 acl_duo *duo_item = racl_list->items;
1015 for (list_cnt = racl_list->count; list_cnt--; duo_item++) {
1016 ida_entries *idal = &duo_item->racl.names;
1017 id_access *ida = idal->idas;
1018 for (name_cnt = idal->count; name_cnt--; ida++) {
1019 if (ida->access & NAME_IS_USER)
1020 ida->id = match_uid(ida->id);
1022 ida->id = match_gid(ida->id, NULL);
1027 void match_acl_ids(void)
1029 match_racl_ids(&access_acl_list);
1030 match_racl_ids(&default_acl_list);
1033 /* This is used by dest_mode(). */
1034 int default_perms_for_dir(const char *dir)
1043 perms = ACCESSPERMS & ~orig_umask;
1044 /* Read the directory's default ACL. If it has none, this will successfully return an empty ACL. */
1045 sacl = sys_acl_get_file(dir, SMB_ACL_TYPE_DEFAULT);
1047 /* Couldn't get an ACL. Darn. */
1053 /* No ACLs are available. */
1057 /* We're doing a dry run, so the containing directory
1058 * wasn't actually created. Don't worry about it. */
1061 /* Otherwise fall through. */
1064 "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
1065 dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno));
1071 racl = empty_rsync_acl;
1072 ok = unpack_smb_acl(sacl, &racl);
1073 sys_acl_free_acl(sacl);
1075 rprintf(FWARNING, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
1079 /* Apply the permission-bit entries of the default ACL, if any. */
1080 if (racl.user_obj != NO_ENTRY) {
1081 perms = rsync_acl_get_perms(&racl);
1083 rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir);
1086 rsync_acl_free(&racl);
1090 #endif /* SUPPORT_ACLS */