2 * Handle passing Access Control Lists between systems.
4 * Copyright (C) 1996 Andrew Tridgell
5 * Copyright (C) 1996 Paul Mackerras
6 * Copyright (C) 2006-2009 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 static size_t prior_access_count = (size_t)-1;
92 static size_t prior_default_count = (size_t)-1;
94 /* === Calculations on ACL types === */
96 static const char *str_acl_type(SMB_ACL_TYPE_T type)
99 case SMB_ACL_TYPE_ACCESS:
101 return "ACL_TYPE_EXTENDED";
103 return "ACL_TYPE_ACCESS";
105 case SMB_ACL_TYPE_DEFAULT:
106 return "ACL_TYPE_DEFAULT";
110 return "unknown ACL type!";
113 static int calc_sacl_entries(const rsync_acl *racl)
115 /* A System ACL always gets user/group/other permission entries. */
116 return racl->names.count
117 #ifdef ACLS_NEED_MASK
120 + (racl->mask_obj != NO_ENTRY)
125 /* Extracts and returns the permission bits from the ACL. This cannot be
126 * called on an rsync_acl that has NO_ENTRY in any spot but the mask. */
127 static int rsync_acl_get_perms(const rsync_acl *racl)
129 return (racl->user_obj << 6)
130 + ((racl->mask_obj != NO_ENTRY ? racl->mask_obj : racl->group_obj) << 3)
134 /* Removes the permission-bit entries from the ACL because these
135 * can be reconstructed from the file's mode. */
136 static void rsync_acl_strip_perms(stat_x *sxp)
138 rsync_acl *racl = sxp->acc_acl;
140 racl->user_obj = NO_ENTRY;
141 if (racl->mask_obj == NO_ENTRY)
142 racl->group_obj = NO_ENTRY;
144 int group_perms = (sxp->st.st_mode >> 3) & 7;
145 if (racl->group_obj == group_perms)
146 racl->group_obj = NO_ENTRY;
147 #ifndef HAVE_SOLARIS_ACLS
148 if (racl->names.count != 0 && racl->mask_obj == group_perms)
149 racl->mask_obj = NO_ENTRY;
152 racl->other_obj = NO_ENTRY;
155 /* Given an empty rsync_acl, fake up the permission bits. */
156 static void rsync_acl_fake_perms(rsync_acl *racl, mode_t mode)
158 racl->user_obj = (mode >> 6) & 7;
159 racl->group_obj = (mode >> 3) & 7;
160 racl->other_obj = mode & 7;
163 /* === Rsync ACL functions === */
165 static rsync_acl *create_racl(void)
167 rsync_acl *racl = new(rsync_acl);
170 out_of_memory("create_racl");
171 *racl = empty_rsync_acl;
176 static BOOL ida_entries_equal(const ida_entries *ial1, const ida_entries *ial2)
178 id_access *ida1, *ida2;
179 int count = ial1->count;
180 if (count != ial2->count)
184 for (; count--; ida1++, ida2++) {
185 if (ida1->access != ida2->access || ida1->id != ida2->id)
191 static BOOL rsync_acl_equal(const rsync_acl *racl1, const rsync_acl *racl2)
193 return racl1->user_obj == racl2->user_obj
194 && racl1->group_obj == racl2->group_obj
195 && racl1->mask_obj == racl2->mask_obj
196 && racl1->other_obj == racl2->other_obj
197 && ida_entries_equal(&racl1->names, &racl2->names);
200 /* Are the extended (non-permission-bit) entries equal? If so, the rest of
201 * the ACL will be handled by the normal mode-preservation code. This is
202 * only meaningful for access ACLs! Note: the 1st arg is a fully-populated
203 * rsync_acl, but the 2nd parameter can be a condensed rsync_acl, which means
204 * that it might have several of its permission objects set to NO_ENTRY. */
205 static BOOL rsync_acl_equal_enough(const rsync_acl *racl1,
206 const rsync_acl *racl2, mode_t m)
208 if ((racl1->mask_obj ^ racl2->mask_obj) & NO_ENTRY)
209 return False; /* One has a mask and the other doesn't */
211 /* When there's a mask, the group_obj becomes an extended entry. */
212 if (racl1->mask_obj != NO_ENTRY) {
213 /* A condensed rsync_acl with a mask can only have no
214 * group_obj when it was identical to the mask. This
215 * means that it was also identical to the group attrs
217 if (racl2->group_obj == NO_ENTRY) {
218 if (racl1->group_obj != ((m >> 3) & 7))
220 } else if (racl1->group_obj != racl2->group_obj)
223 return ida_entries_equal(&racl1->names, &racl2->names);
226 static void rsync_acl_free(rsync_acl *racl)
228 if (racl->names.idas)
229 free(racl->names.idas);
230 *racl = empty_rsync_acl;
233 void free_acl(stat_x *sxp)
236 rsync_acl_free(sxp->acc_acl);
241 rsync_acl_free(sxp->def_acl);
247 #ifdef SMB_ACL_NEED_SORT
248 static int id_access_sorter(const void *r1, const void *r2)
250 id_access *ida1 = (id_access *)r1;
251 id_access *ida2 = (id_access *)r2;
252 id_t rid1 = ida1->id, rid2 = ida2->id;
253 if ((ida1->access ^ ida2->access) & NAME_IS_USER)
254 return ida1->access & NAME_IS_USER ? -1 : 1;
255 return rid1 == rid2 ? 0 : rid1 < rid2 ? -1 : 1;
259 /* === System ACLs === */
261 /* Unpack system ACL -> rsync ACL verbatim. Return whether we succeeded. */
262 static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
264 static item_list temp_ida_list = EMPTY_ITEM_LIST;
265 SMB_ACL_ENTRY_T entry;
269 errfun = "sys_acl_get_entry";
270 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
272 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
273 SMB_ACL_TAG_T tag_type;
277 if ((rc = sys_acl_get_info(entry, &tag_type, &access, &g_u_id)) != 0) {
278 errfun = "sys_acl_get_info";
281 /* continue == done with entry; break == store in temporary ida list */
283 #ifndef HAVE_OSX_ACLS
284 case SMB_ACL_USER_OBJ:
285 if (racl->user_obj == NO_ENTRY)
286 racl->user_obj = access;
288 rprintf(FINFO, "unpack_smb_acl: warning: duplicate USER_OBJ entry ignored\n");
290 case SMB_ACL_GROUP_OBJ:
291 if (racl->group_obj == NO_ENTRY)
292 racl->group_obj = access;
294 rprintf(FINFO, "unpack_smb_acl: warning: duplicate GROUP_OBJ entry ignored\n");
297 if (racl->mask_obj == NO_ENTRY)
298 racl->mask_obj = access;
300 rprintf(FINFO, "unpack_smb_acl: warning: duplicate MASK entry ignored\n");
303 if (racl->other_obj == NO_ENTRY)
304 racl->other_obj = access;
306 rprintf(FINFO, "unpack_smb_acl: warning: duplicate OTHER entry ignored\n");
310 access |= NAME_IS_USER;
315 rprintf(FINFO, "unpack_smb_acl: warning: entry with unrecognized tag type ignored\n");
318 ida = EXPAND_ITEM_LIST(&temp_ida_list, id_access, -10);
320 ida->access = access;
323 rsyserr(FERROR_XFER, errno, "unpack_smb_acl: %s()", errfun);
324 rsync_acl_free(racl);
328 /* Transfer the count id_access items out of the temp_ida_list
329 * into the names ida_entries list in racl. */
330 if (temp_ida_list.count) {
331 #ifdef SMB_ACL_NEED_SORT
332 if (temp_ida_list.count > 1) {
333 qsort(temp_ida_list.items, temp_ida_list.count,
334 sizeof (id_access), id_access_sorter);
337 if (!(racl->names.idas = new_array(id_access, temp_ida_list.count)))
338 out_of_memory("unpack_smb_acl");
339 memcpy(racl->names.idas, temp_ida_list.items,
340 temp_ida_list.count * sizeof (id_access));
342 racl->names.idas = NULL;
344 racl->names.count = temp_ida_list.count;
346 /* Truncate the temporary list now that its idas have been saved. */
347 temp_ida_list.count = 0;
352 /* Synactic sugar for system calls */
354 #define CALL_OR_ERROR(func,args,str) \
362 #define COE(func,args) CALL_OR_ERROR(func,args,#func)
363 #define COE2(func,args) CALL_OR_ERROR(func,args,NULL)
365 #ifndef HAVE_OSX_ACLS
366 /* Store the permissions in the system ACL entry. */
367 static int store_access_in_entry(uint32 access, SMB_ACL_ENTRY_T entry)
369 if (sys_acl_set_access_bits(entry, access)) {
370 rsyserr(FERROR_XFER, errno, "store_access_in_entry sys_acl_set_access_bits()");
377 /* Pack rsync ACL -> system ACL verbatim. Return whether we succeeded. */
378 static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
380 #ifdef ACLS_NEED_MASK
385 const char *errfun = NULL;
386 SMB_ACL_ENTRY_T entry;
388 if (!(*smb_acl = sys_acl_init(calc_sacl_entries(racl)))) {
389 rsyserr(FERROR_XFER, errno, "pack_smb_acl: sys_acl_init()");
393 #ifndef HAVE_OSX_ACLS
394 COE( sys_acl_create_entry,(smb_acl, &entry) );
395 COE( sys_acl_set_info,(entry, SMB_ACL_USER_OBJ, racl->user_obj & ~NO_ENTRY, 0) );
398 for (ida = racl->names.idas, count = racl->names.count; count; ida++, count--) {
399 #ifdef SMB_ACL_NEED_SORT
400 if (!(ida->access & NAME_IS_USER))
403 COE( sys_acl_create_entry,(smb_acl, &entry) );
404 COE( sys_acl_set_info,
406 ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP,
407 ida->access & ~NAME_IS_USER, ida->id) );
410 #ifndef HAVE_OSX_ACLS
411 COE( sys_acl_create_entry,(smb_acl, &entry) );
412 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP_OBJ, racl->group_obj & ~NO_ENTRY, 0) );
414 #ifdef SMB_ACL_NEED_SORT
415 for ( ; count; ida++, count--) {
416 COE( sys_acl_create_entry,(smb_acl, &entry) );
417 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP, ida->access, ida->id) );
421 #ifdef ACLS_NEED_MASK
422 mask_bits = racl->mask_obj == NO_ENTRY ? racl->group_obj & ~NO_ENTRY : racl->mask_obj;
423 COE( sys_acl_create_entry,(smb_acl, &entry) );
424 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, NULL) );
426 if (racl->mask_obj != NO_ENTRY) {
427 COE( sys_acl_create_entry,(smb_acl, &entry) );
428 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, racl->mask_obj, 0) );
432 COE( sys_acl_create_entry,(smb_acl, &entry) );
433 COE( sys_acl_set_info,(entry, SMB_ACL_OTHER, racl->other_obj & ~NO_ENTRY, 0) );
437 if (sys_acl_valid(*smb_acl) < 0)
438 rprintf(FERROR_XFER, "pack_smb_acl: warning: system says the ACL I packed is invalid\n");
445 rsyserr(FERROR_XFER, errno, "pack_smb_acl %s()", errfun);
447 sys_acl_free_acl(*smb_acl);
451 static int find_matching_rsync_acl(const rsync_acl *racl, SMB_ACL_TYPE_T type,
452 const item_list *racl_list)
454 static int access_match = -1, default_match = -1;
455 int *match = type == SMB_ACL_TYPE_ACCESS ? &access_match : &default_match;
456 size_t count = racl_list->count;
458 /* If this is the first time through or we didn't match the last
459 * time, then start at the end of the list, which should be the
460 * best place to start hunting. */
462 *match = racl_list->count - 1;
464 rsync_acl *base = racl_list->items;
465 if (rsync_acl_equal(base + *match, racl))
468 *match = racl_list->count - 1;
475 static int get_rsync_acl(const char *fname, rsync_acl *racl,
476 SMB_ACL_TYPE_T type, mode_t mode)
480 #ifdef SUPPORT_XATTRS
481 /* --fake-super support: load ACLs from an xattr. */
487 if ((buf = get_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, &len)) == NULL)
489 cnt = (len - 4*4) / (4+4);
490 if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4) {
495 racl->user_obj = IVAL(buf, 0);
496 racl->group_obj = IVAL(buf, 4);
497 racl->mask_obj = IVAL(buf, 8);
498 racl->other_obj = IVAL(buf, 12);
501 char *bp = buf + 4*4;
503 if (!(ida = racl->names.idas = new_array(id_access, cnt)))
504 out_of_memory("get_rsync_acl");
505 racl->names.count = cnt;
506 for ( ; cnt--; ida++, bp += 4+4) {
507 ida->id = IVAL(bp, 0);
508 ida->access = IVAL(bp, 4);
516 if ((sacl = sys_acl_get_file(fname, type)) != 0) {
517 BOOL ok = unpack_smb_acl(sacl, racl);
519 sys_acl_free_acl(sacl);
523 } else if (no_acl_syscall_error(errno)) {
524 /* ACLs are not supported, so pretend we have a basic ACL. */
525 if (type == SMB_ACL_TYPE_ACCESS)
526 rsync_acl_fake_perms(racl, mode);
528 rsyserr(FERROR_XFER, errno, "get_acl: sys_acl_get_file(%s, %s)",
529 fname, str_acl_type(type));
536 /* Return the Access Control List for the given filename. */
537 int get_acl(const char *fname, stat_x *sxp)
539 sxp->acc_acl = create_racl();
540 if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS,
541 sxp->st.st_mode) < 0) {
546 if (S_ISDIR(sxp->st.st_mode)) {
547 sxp->def_acl = create_racl();
548 if (get_rsync_acl(fname, sxp->def_acl, SMB_ACL_TYPE_DEFAULT,
549 sxp->st.st_mode) < 0) {
558 /* === Send functions === */
560 /* Send the ida list over the file descriptor. */
561 static void send_ida_entries(int f, const ida_entries *idal)
564 size_t count = idal->count;
566 write_varint(f, idal->count);
568 for (ida = idal->idas; count--; ida++) {
569 uint32 xbits = ida->access << 2;
571 if (ida->access & NAME_IS_USER) {
572 xbits |= XFLAG_NAME_IS_USER;
573 name = add_uid(ida->id);
575 name = add_gid(ida->id);
576 write_varint(f, ida->id);
577 if (inc_recurse && name) {
578 int len = strlen(name);
579 write_varint(f, xbits | XFLAG_NAME_FOLLOWS);
581 write_buf(f, name, len);
583 write_varint(f, xbits);
587 static void send_rsync_acl(int f, rsync_acl *racl, SMB_ACL_TYPE_T type,
588 item_list *racl_list)
590 int ndx = find_matching_rsync_acl(racl, type, racl_list);
592 /* Send 0 (-1 + 1) to indicate that literal ACL data follows. */
593 write_varint(f, ndx + 1);
596 rsync_acl *new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000);
599 if (racl->user_obj != NO_ENTRY)
600 flags |= XMIT_USER_OBJ;
601 if (racl->group_obj != NO_ENTRY)
602 flags |= XMIT_GROUP_OBJ;
603 if (racl->mask_obj != NO_ENTRY)
604 flags |= XMIT_MASK_OBJ;
605 if (racl->other_obj != NO_ENTRY)
606 flags |= XMIT_OTHER_OBJ;
607 if (racl->names.count)
608 flags |= XMIT_NAME_LIST;
610 write_byte(f, flags);
612 if (flags & XMIT_USER_OBJ)
613 write_varint(f, racl->user_obj);
614 if (flags & XMIT_GROUP_OBJ)
615 write_varint(f, racl->group_obj);
616 if (flags & XMIT_MASK_OBJ)
617 write_varint(f, racl->mask_obj);
618 if (flags & XMIT_OTHER_OBJ)
619 write_varint(f, racl->other_obj);
620 if (flags & XMIT_NAME_LIST)
621 send_ida_entries(f, &racl->names);
623 /* Give the allocated data to the new list object. */
625 *racl = empty_rsync_acl;
629 /* Send the ACL from the stat_x structure down the indicated file descriptor.
630 * This also frees the ACL data. */
631 void send_acl(int f, stat_x *sxp)
634 sxp->acc_acl = create_racl();
635 rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode);
637 /* Avoid sending values that can be inferred from other data. */
638 rsync_acl_strip_perms(sxp);
640 send_rsync_acl(f, sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list);
642 if (S_ISDIR(sxp->st.st_mode)) {
644 sxp->def_acl = create_racl();
646 send_rsync_acl(f, sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list);
650 /* === Receive functions === */
652 static uint32 recv_acl_access(int f, uchar *name_follows_ptr)
654 uint32 access = read_varint(f);
656 if (name_follows_ptr) {
657 int flags = access & 3;
659 if (am_root >= 0 && access & ~SMB_ACL_VALID_NAME_BITS)
661 if (flags & XFLAG_NAME_FOLLOWS)
662 *name_follows_ptr = 1;
664 *name_follows_ptr = 0;
665 if (flags & XFLAG_NAME_IS_USER)
666 access |= NAME_IS_USER;
667 } else if (am_root >= 0 && access & ~SMB_ACL_VALID_OBJ_BITS) {
669 rprintf(FERROR_XFER, "recv_acl_access: value out of range: %x\n",
671 exit_cleanup(RERR_STREAMIO);
677 static uchar recv_ida_entries(int f, ida_entries *ent)
679 uchar computed_mask_bits = 0;
680 int i, count = read_varint(f);
683 if (!(ent->idas = new_array(id_access, count)))
684 out_of_memory("recv_ida_entries");
690 for (i = 0; i < count; i++) {
692 id_t id = read_varint(f);
693 uint32 access = recv_acl_access(f, &has_name);
696 if (access & NAME_IS_USER)
697 id = recv_user_name(f, id);
699 id = recv_group_name(f, id, NULL);
700 } else if (access & NAME_IS_USER) {
701 if (inc_recurse && am_root && !numeric_ids)
704 if (inc_recurse && (!am_root || !numeric_ids))
705 id = match_gid(id, NULL);
708 ent->idas[i].id = id;
709 ent->idas[i].access = access;
710 computed_mask_bits |= access;
713 return computed_mask_bits & ~NO_ENTRY;
716 static int recv_rsync_acl(int f, item_list *racl_list, SMB_ACL_TYPE_T type, mode_t mode)
718 uchar computed_mask_bits = 0;
721 int ndx = read_varint(f);
723 if (ndx < 0 || (size_t)ndx > racl_list->count) {
724 rprintf(FERROR_XFER, "recv_acl_index: %s ACL index %d > %d\n",
725 str_acl_type(type), ndx, (int)racl_list->count);
726 exit_cleanup(RERR_STREAMIO);
732 ndx = racl_list->count;
733 duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
734 duo_item->racl = empty_rsync_acl;
736 flags = read_byte(f);
738 if (flags & XMIT_USER_OBJ)
739 duo_item->racl.user_obj = recv_acl_access(f, NULL);
740 if (flags & XMIT_GROUP_OBJ)
741 duo_item->racl.group_obj = recv_acl_access(f, NULL);
742 if (flags & XMIT_MASK_OBJ)
743 duo_item->racl.mask_obj = recv_acl_access(f, NULL);
744 if (flags & XMIT_OTHER_OBJ)
745 duo_item->racl.other_obj = recv_acl_access(f, NULL);
746 if (flags & XMIT_NAME_LIST)
747 computed_mask_bits |= recv_ida_entries(f, &duo_item->racl.names);
750 /* If we received a superfluous mask, throw it away. */
751 duo_item->racl.mask_obj = NO_ENTRY;
753 if (duo_item->racl.names.count && duo_item->racl.mask_obj == NO_ENTRY) {
754 /* Mask must be non-empty with lists. */
755 if (type == SMB_ACL_TYPE_ACCESS)
756 computed_mask_bits = (mode >> 3) & 7;
758 computed_mask_bits |= duo_item->racl.group_obj & ~NO_ENTRY;
759 duo_item->racl.mask_obj = computed_mask_bits;
763 duo_item->sacl = NULL;
768 /* Receive the ACL info the sender has included for this file-list entry. */
769 void receive_acl(int f, struct file_struct *file)
771 F_ACL(file) = recv_rsync_acl(f, &access_acl_list, SMB_ACL_TYPE_ACCESS, file->mode);
773 if (S_ISDIR(file->mode))
774 F_DIR_DEFACL(file) = recv_rsync_acl(f, &default_acl_list, SMB_ACL_TYPE_DEFAULT, 0);
777 static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list)
783 else if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) == -1) {
785 ndx = racl_list->count;
786 new_duo = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
787 new_duo->racl = *racl;
788 new_duo->sacl = NULL;
789 *racl = empty_rsync_acl;
795 /* Turn the ACL data in stat_x into cached ACL data, setting the index
796 * values in the file struct. */
797 void cache_tmp_acl(struct file_struct *file, stat_x *sxp)
799 if (prior_access_count == (size_t)-1)
800 prior_access_count = access_acl_list.count;
802 F_ACL(file) = cache_rsync_acl(sxp->acc_acl,
803 SMB_ACL_TYPE_ACCESS, &access_acl_list);
805 if (S_ISDIR(sxp->st.st_mode)) {
806 if (prior_default_count == (size_t)-1)
807 prior_default_count = default_acl_list.count;
808 F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl,
809 SMB_ACL_TYPE_DEFAULT, &default_acl_list);
813 static void uncache_duo_acls(item_list *duo_list, size_t start)
815 acl_duo *duo_item = duo_list->items;
816 acl_duo *duo_start = duo_item + start;
818 duo_item += duo_list->count;
819 duo_list->count = start;
821 while (duo_item-- > duo_start) {
822 rsync_acl_free(&duo_item->racl);
824 sys_acl_free_acl(duo_item->sacl);
828 void uncache_tmp_acls(void)
830 if (prior_access_count != (size_t)-1) {
831 uncache_duo_acls(&access_acl_list, prior_access_count);
832 prior_access_count = (size_t)-1;
835 if (prior_default_count != (size_t)-1) {
836 uncache_duo_acls(&default_acl_list, prior_default_count);
837 prior_default_count = (size_t)-1;
841 #ifndef HAVE_OSX_ACLS
842 static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode, mode_t mode)
844 SMB_ACL_ENTRY_T entry;
849 /* If the sticky bit is going on, it's not safe to allow all
850 * the new ACL to go into effect before it gets set. */
851 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
855 if (mode & S_ISVTX && !(old_mode & S_ISVTX))
858 /* If setuid or setgid is going off, it's not safe to allow all
859 * the new ACL to go into effect before they get cleared. */
860 if ((old_mode & S_ISUID && !(mode & S_ISUID))
861 || (old_mode & S_ISGID && !(mode & S_ISGID)))
866 errfun = "sys_acl_get_entry";
867 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
869 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
870 SMB_ACL_TAG_T tag_type;
871 if ((rc = sys_acl_get_tag_type(entry, &tag_type)) != 0) {
872 errfun = "sys_acl_get_tag_type";
876 case SMB_ACL_USER_OBJ:
877 COE2( store_access_in_entry,((mode >> 6) & 7, entry) );
879 case SMB_ACL_GROUP_OBJ:
880 /* group is only empty when identical to group perms. */
881 if (racl->group_obj != NO_ENTRY)
883 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
886 #ifndef HAVE_SOLARIS_ACLS
887 #ifndef ACLS_NEED_MASK
888 /* mask is only empty when we don't need it. */
889 if (racl->mask_obj == NO_ENTRY)
892 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
896 COE2( store_access_in_entry,(mode & 7, entry) );
903 rsyserr(FERROR_XFER, errno, "change_sacl_perms: %s()",
909 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
910 /* Ensure that chmod() will be called to restore any lost setid bits. */
911 if (old_mode & (S_ISUID | S_ISGID | S_ISVTX)
912 && BITS_EQUAL(old_mode, mode, CHMOD_BITS))
913 old_mode &= ~(S_ISUID | S_ISGID | S_ISVTX);
916 /* Return the mode of the file on disk, as we will set them. */
917 return (old_mode & ~ACCESSPERMS) | (mode & ACCESSPERMS);
921 static int set_rsync_acl(const char *fname, acl_duo *duo_item,
922 SMB_ACL_TYPE_T type, stat_x *sxp, mode_t mode)
924 if (type == SMB_ACL_TYPE_DEFAULT
925 && duo_item->racl.user_obj == NO_ENTRY) {
927 #ifdef SUPPORT_XATTRS
928 /* --fake-super support: delete default ACL from xattrs. */
930 rc = del_def_xattr_acl(fname);
933 rc = sys_acl_delete_def_file(fname);
935 rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_delete_def_file(%s)",
939 #ifdef SUPPORT_XATTRS
940 } else if (am_root < 0) {
941 /* --fake-super support: store ACLs in an xattr. */
942 int cnt = duo_item->racl.names.count;
943 size_t len = 4*4 + cnt * (4+4);
944 char *buf = new_array(char, len);
947 SIVAL(buf, 0, duo_item->racl.user_obj);
948 SIVAL(buf, 4, duo_item->racl.group_obj);
949 SIVAL(buf, 8, duo_item->racl.mask_obj);
950 SIVAL(buf, 12, duo_item->racl.other_obj);
953 char *bp = buf + 4*4;
954 id_access *ida = duo_item->racl.names.idas;
955 for ( ; cnt--; ida++, bp += 4+4) {
956 SIVAL(bp, 0, ida->id);
957 SIVAL(bp, 4, ida->access);
960 rc = set_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, buf, len);
965 mode_t cur_mode = sxp->st.st_mode;
967 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
970 mode = 0; /* eliminate compiler warning */
972 if (type == SMB_ACL_TYPE_ACCESS) {
973 cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl,
975 if (cur_mode == (mode_t)-1)
979 if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) {
980 rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_set_file(%s, %s)",
981 fname, str_acl_type(type));
984 if (type == SMB_ACL_TYPE_ACCESS)
985 sxp->st.st_mode = cur_mode;
991 /* Given a fname, this sets extended access ACL entries, the default ACL (for a
992 * dir), and the regular mode bits on the file. Call this with fname set to
993 * NULL to just check if the ACL is different.
995 * If the ACL operation has a side-effect of changing the file's mode, the
996 * sxp->st.st_mode value will be changed to match.
998 * Returns 0 for an unchanged ACL, 1 for changed, -1 for failed. */
999 int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp, mode_t new_mode)
1005 if (!dry_run && (read_only || list_only)) {
1011 if (ndx >= 0 && (size_t)ndx < access_acl_list.count) {
1012 acl_duo *duo_item = access_acl_list.items;
1015 && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, new_mode);
1018 if (!dry_run && fname
1019 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS,
1025 if (!S_ISDIR(new_mode))
1028 ndx = F_DIR_DEFACL(file);
1029 if (ndx >= 0 && (size_t)ndx < default_acl_list.count) {
1030 acl_duo *duo_item = default_acl_list.items;
1032 eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl);
1035 if (!dry_run && fname
1036 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT,
1045 /* Non-incremental recursion needs to convert all the received IDs.
1046 * This is done in a single pass after receiving the whole file-list. */
1047 static void match_racl_ids(const item_list *racl_list)
1049 int list_cnt, name_cnt;
1050 acl_duo *duo_item = racl_list->items;
1051 for (list_cnt = racl_list->count; list_cnt--; duo_item++) {
1052 ida_entries *idal = &duo_item->racl.names;
1053 id_access *ida = idal->idas;
1054 for (name_cnt = idal->count; name_cnt--; ida++) {
1055 if (ida->access & NAME_IS_USER)
1056 ida->id = match_uid(ida->id);
1058 ida->id = match_gid(ida->id, NULL);
1063 void match_acl_ids(void)
1065 match_racl_ids(&access_acl_list);
1066 match_racl_ids(&default_acl_list);
1069 /* This is used by dest_mode(). */
1070 int default_perms_for_dir(const char *dir)
1079 perms = ACCESSPERMS & ~orig_umask;
1080 /* Read the directory's default ACL. If it has none, this will successfully return an empty ACL. */
1081 sacl = sys_acl_get_file(dir, SMB_ACL_TYPE_DEFAULT);
1083 /* Couldn't get an ACL. Darn. */
1089 /* No ACLs are available. */
1093 /* We're doing a dry run, so the containing directory
1094 * wasn't actually created. Don't worry about it. */
1097 /* Otherwise fall through. */
1100 "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
1101 dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno));
1107 racl = empty_rsync_acl;
1108 ok = unpack_smb_acl(sacl, &racl);
1109 sys_acl_free_acl(sacl);
1111 rprintf(FWARNING, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
1115 /* Apply the permission-bit entries of the default ACL, if any. */
1116 if (racl.user_obj != NO_ENTRY) {
1117 perms = rsync_acl_get_perms(&racl);
1118 if (DEBUG_GTE(ACL, 1))
1119 rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir);
1122 rsync_acl_free(&racl);
1126 #endif /* SUPPORT_ACLS */