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)
95 return type == SMB_ACL_TYPE_ACCESS ? "SMB_ACL_TYPE_ACCESS"
96 : type == SMB_ACL_TYPE_DEFAULT ? "SMB_ACL_TYPE_DEFAULT"
97 : "unknown SMB_ACL_TYPE_T";
100 static int calc_sacl_entries(const rsync_acl *racl)
102 /* A System ACL always gets user/group/other permission entries. */
103 return racl->names.count
104 #ifdef ACLS_NEED_MASK
107 + (racl->mask_obj != NO_ENTRY) + 3;
111 /* Extracts and returns the permission bits from the ACL. This cannot be
112 * called on an rsync_acl that has NO_ENTRY in any spot but the mask. */
113 static int rsync_acl_get_perms(const rsync_acl *racl)
115 return (racl->user_obj << 6)
116 + ((racl->mask_obj != NO_ENTRY ? racl->mask_obj : racl->group_obj) << 3)
120 /* Removes the permission-bit entries from the ACL because these
121 * can be reconstructed from the file's mode. */
122 static void rsync_acl_strip_perms(rsync_acl *racl)
124 racl->user_obj = NO_ENTRY;
125 if (racl->mask_obj == NO_ENTRY)
126 racl->group_obj = NO_ENTRY;
128 if (racl->group_obj == racl->mask_obj)
129 racl->group_obj = NO_ENTRY;
130 racl->mask_obj = NO_ENTRY;
132 racl->other_obj = NO_ENTRY;
135 /* Given an empty rsync_acl, fake up the permission bits. */
136 static void rsync_acl_fake_perms(rsync_acl *racl, mode_t mode)
138 racl->user_obj = (mode >> 6) & 7;
139 racl->group_obj = (mode >> 3) & 7;
140 racl->other_obj = mode & 7;
143 /* === Rsync ACL functions === */
145 static rsync_acl *create_racl(void)
147 rsync_acl *racl = new(rsync_acl);
150 out_of_memory("create_racl");
151 *racl = empty_rsync_acl;
156 static BOOL ida_entries_equal(const ida_entries *ial1, const ida_entries *ial2)
158 id_access *ida1, *ida2;
159 int count = ial1->count;
160 if (count != ial2->count)
164 for (; count--; ida1++, ida2++) {
165 if (ida1->access != ida2->access || ida1->id != ida2->id)
171 static BOOL rsync_acl_equal(const rsync_acl *racl1, const rsync_acl *racl2)
173 return racl1->user_obj == racl2->user_obj
174 && racl1->group_obj == racl2->group_obj
175 && racl1->mask_obj == racl2->mask_obj
176 && racl1->other_obj == racl2->other_obj
177 && ida_entries_equal(&racl1->names, &racl2->names);
180 /* Are the extended (non-permission-bit) entries equal? If so, the rest of
181 * the ACL will be handled by the normal mode-preservation code. This is
182 * only meaningful for access ACLs! Note: the 1st arg is a fully-populated
183 * rsync_acl, but the 2nd parameter can be a condensed rsync_acl, which means
184 * that it might have several of its permission objects set to NO_ENTRY. */
185 static BOOL rsync_acl_equal_enough(const rsync_acl *racl1,
186 const rsync_acl *racl2, mode_t m)
188 if ((racl1->mask_obj ^ racl2->mask_obj) & NO_ENTRY)
189 return False; /* One has a mask and the other doesn't */
191 /* When there's a mask, the group_obj becomes an extended entry. */
192 if (racl1->mask_obj != NO_ENTRY) {
193 /* A condensed rsync_acl with a mask can only have no
194 * group_obj when it was identical to the mask. This
195 * means that it was also identical to the group attrs
197 if (racl2->group_obj == NO_ENTRY) {
198 if (racl1->group_obj != ((m >> 3) & 7))
200 } else if (racl1->group_obj != racl2->group_obj)
203 return ida_entries_equal(&racl1->names, &racl2->names);
206 static void rsync_acl_free(rsync_acl *racl)
208 if (racl->names.idas)
209 free(racl->names.idas);
210 *racl = empty_rsync_acl;
213 void free_acl(stat_x *sxp)
216 rsync_acl_free(sxp->acc_acl);
221 rsync_acl_free(sxp->def_acl);
227 #ifdef SMB_ACL_NEED_SORT
228 static int id_access_sorter(const void *r1, const void *r2)
230 id_access *ida1 = (id_access *)r1;
231 id_access *ida2 = (id_access *)r2;
232 id_t rid1 = ida1->id, rid2 = ida2->id;
233 if ((ida1->access ^ ida2->access) & NAME_IS_USER)
234 return ida1->access & NAME_IS_USER ? -1 : 1;
235 return rid1 == rid2 ? 0 : rid1 < rid2 ? -1 : 1;
239 /* === System ACLs === */
241 /* Unpack system ACL -> rsync ACL verbatim. Return whether we succeeded. */
242 static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
244 static item_list temp_ida_list = EMPTY_ITEM_LIST;
245 SMB_ACL_ENTRY_T entry;
249 errfun = "sys_acl_get_entry";
250 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
252 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
253 SMB_ACL_TAG_T tag_type;
257 if ((rc = sys_acl_get_info(entry, &tag_type, &access, &g_u_id)) != 0) {
258 errfun = "sys_acl_get_info";
261 /* continue == done with entry; break == store in temporary ida list */
263 #ifndef HAVE_OSX_ACLS
264 case SMB_ACL_USER_OBJ:
265 if (racl->user_obj == NO_ENTRY)
266 racl->user_obj = access;
268 rprintf(FINFO, "unpack_smb_acl: warning: duplicate USER_OBJ entry ignored\n");
270 case SMB_ACL_GROUP_OBJ:
271 if (racl->group_obj == NO_ENTRY)
272 racl->group_obj = access;
274 rprintf(FINFO, "unpack_smb_acl: warning: duplicate GROUP_OBJ entry ignored\n");
277 if (racl->mask_obj == NO_ENTRY)
278 racl->mask_obj = access;
280 rprintf(FINFO, "unpack_smb_acl: warning: duplicate MASK entry ignored\n");
283 if (racl->other_obj == NO_ENTRY)
284 racl->other_obj = access;
286 rprintf(FINFO, "unpack_smb_acl: warning: duplicate OTHER entry ignored\n");
290 access |= NAME_IS_USER;
295 rprintf(FINFO, "unpack_smb_acl: warning: entry with unrecognized tag type ignored\n");
298 ida = EXPAND_ITEM_LIST(&temp_ida_list, id_access, -10);
300 ida->access = access;
303 rsyserr(FERROR, errno, "unpack_smb_acl: %s()", errfun);
304 rsync_acl_free(racl);
308 /* Transfer the count id_access items out of the temp_ida_list
309 * into the names ida_entries list in racl. */
310 if (temp_ida_list.count) {
311 #ifdef SMB_ACL_NEED_SORT
312 if (temp_ida_list.count > 1) {
313 qsort(temp_ida_list.items, temp_ida_list.count,
314 sizeof (id_access), id_access_sorter);
317 if (!(racl->names.idas = new_array(id_access, temp_ida_list.count)))
318 out_of_memory("unpack_smb_acl");
319 memcpy(racl->names.idas, temp_ida_list.items,
320 temp_ida_list.count * sizeof (id_access));
322 racl->names.idas = NULL;
324 racl->names.count = temp_ida_list.count;
326 /* Truncate the temporary list now that its idas have been saved. */
327 temp_ida_list.count = 0;
329 #ifdef ACLS_NEED_MASK
330 if (!racl->names.count && racl->mask_obj != NO_ENTRY) {
331 /* Throw away a superfluous mask, but mask off the
332 * group perms with it first. */
333 racl->group_obj &= racl->mask_obj;
334 racl->mask_obj = NO_ENTRY;
341 /* Synactic sugar for system calls */
343 #define CALL_OR_ERROR(func,args,str) \
351 #define COE(func,args) CALL_OR_ERROR(func,args,#func)
352 #define COE2(func,args) CALL_OR_ERROR(func,args,NULL)
354 #ifndef HAVE_OSX_ACLS
355 /* Store the permissions in the system ACL entry. */
356 static int store_access_in_entry(uint32 access, SMB_ACL_ENTRY_T entry)
358 if (sys_acl_set_access_bits(entry, access)) {
359 rsyserr(FERROR, errno, "store_access_in_entry sys_acl_set_access_bits()");
366 /* Pack rsync ACL -> system ACL verbatim. Return whether we succeeded. */
367 static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
369 #ifdef ACLS_NEED_MASK
374 const char *errfun = NULL;
375 SMB_ACL_ENTRY_T entry;
377 if (!(*smb_acl = sys_acl_init(calc_sacl_entries(racl)))) {
378 rsyserr(FERROR, errno, "pack_smb_acl: sys_acl_init()");
382 #ifndef HAVE_OSX_ACLS
383 COE( sys_acl_create_entry,(smb_acl, &entry) );
384 COE( sys_acl_set_info,(entry, SMB_ACL_USER_OBJ, racl->user_obj & ~NO_ENTRY, 0) );
387 for (ida = racl->names.idas, count = racl->names.count; count; ida++, count--) {
388 #ifdef SMB_ACL_NEED_SORT
389 if (!(ida->access & NAME_IS_USER))
392 COE( sys_acl_create_entry,(smb_acl, &entry) );
393 COE( sys_acl_set_info,(entry,
394 #ifdef SMB_ACL_NEED_SORT
397 ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP,
399 ida->access & ~NAME_IS_USER, ida->id) );
402 #ifndef HAVE_OSX_ACLS
403 COE( sys_acl_create_entry,(smb_acl, &entry) );
404 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP_OBJ, racl->group_obj & ~NO_ENTRY, 0) );
406 #ifdef SMB_ACL_NEED_SORT
407 for ( ; count; ida++, count--) {
408 COE( sys_acl_create_entry,(smb_acl, &entry) );
409 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP, ida->access, ida->id) );
413 #ifdef ACLS_NEED_MASK
414 mask_bits = racl->mask_obj == NO_ENTRY ? racl->group_obj & ~NO_ENTRY : racl->mask_obj;
415 COE( sys_acl_create_entry,(smb_acl, &entry) );
416 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, NULL) );
418 if (racl->mask_obj != NO_ENTRY) {
419 COE( sys_acl_create_entry,(smb_acl, &entry) );
420 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, racl->mask_obj, 0) );
424 COE( sys_acl_create_entry,(smb_acl, &entry) );
425 COE( sys_acl_set_info,(entry, SMB_ACL_OTHER, racl->other_obj & ~NO_ENTRY, 0) );
429 if (sys_acl_valid(*smb_acl) < 0)
430 rprintf(FERROR, "pack_smb_acl: warning: system says the ACL I packed is invalid\n");
437 rsyserr(FERROR, errno, "pack_smb_acl %s()", errfun);
439 sys_acl_free_acl(*smb_acl);
443 static int find_matching_rsync_acl(const rsync_acl *racl, SMB_ACL_TYPE_T type,
444 const item_list *racl_list)
446 static int access_match = -1, default_match = -1;
447 int *match = type == SMB_ACL_TYPE_ACCESS ? &access_match : &default_match;
448 size_t count = racl_list->count;
450 /* If this is the first time through or we didn't match the last
451 * time, then start at the end of the list, which should be the
452 * best place to start hunting. */
454 *match = racl_list->count - 1;
456 rsync_acl *base = racl_list->items;
457 if (rsync_acl_equal(base + *match, racl))
460 *match = racl_list->count - 1;
467 static int get_rsync_acl(const char *fname, rsync_acl *racl,
468 SMB_ACL_TYPE_T type, mode_t mode)
472 #ifdef SUPPORT_XATTRS
473 /* --fake-super support: load ACLs from an xattr. */
479 if ((buf = get_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, &len)) == NULL)
481 cnt = (len - 4*4) / (4+4);
482 if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4)
485 racl->user_obj = IVAL(buf, 0);
486 racl->group_obj = IVAL(buf, 4);
487 racl->mask_obj = IVAL(buf, 8);
488 racl->other_obj = IVAL(buf, 12);
491 char *bp = buf + 4*4;
493 if (!(ida = racl->names.idas = new_array(id_access, cnt)))
494 out_of_memory("get_rsync_acl");
495 racl->names.count = cnt;
496 for ( ; cnt--; ida++, bp += 4+4) {
497 ida->id = IVAL(bp, 0);
498 ida->access = IVAL(bp, 4);
506 if ((sacl = sys_acl_get_file(fname, type)) != 0) {
507 BOOL ok = unpack_smb_acl(sacl, racl);
509 sys_acl_free_acl(sacl);
513 } else if (no_acl_syscall_error(errno)) {
514 /* ACLs are not supported, so pretend we have a basic ACL. */
515 if (type == SMB_ACL_TYPE_ACCESS)
516 rsync_acl_fake_perms(racl, mode);
518 rsyserr(FERROR, errno, "get_acl: sys_acl_get_file(%s, %s)",
519 fname, str_acl_type(type));
526 /* Return the Access Control List for the given filename. */
527 int get_acl(const char *fname, stat_x *sxp)
529 sxp->acc_acl = create_racl();
530 if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS,
531 sxp->st.st_mode) < 0) {
536 if (S_ISDIR(sxp->st.st_mode)) {
537 sxp->def_acl = create_racl();
538 if (get_rsync_acl(fname, sxp->def_acl, SMB_ACL_TYPE_DEFAULT,
539 sxp->st.st_mode) < 0) {
548 /* === Send functions === */
550 /* Send the ida list over the file descriptor. */
551 static void send_ida_entries(const ida_entries *idal, int f)
554 size_t count = idal->count;
556 write_varint(f, idal->count);
558 for (ida = idal->idas; count--; ida++) {
559 uint32 xbits = ida->access << 2;
561 if (ida->access & NAME_IS_USER) {
562 xbits |= XFLAG_NAME_IS_USER;
563 name = add_uid(ida->id);
565 name = add_gid(ida->id);
566 write_varint(f, ida->id);
567 if (inc_recurse && name) {
568 int len = strlen(name);
569 write_varint(f, xbits | XFLAG_NAME_FOLLOWS);
571 write_buf(f, name, len);
573 write_varint(f, xbits);
577 static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type,
578 item_list *racl_list, int f)
580 int ndx = find_matching_rsync_acl(racl, type, racl_list);
582 /* Send 0 (-1 + 1) to indicate that literal ACL data follows. */
583 write_varint(f, ndx + 1);
586 rsync_acl *new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000);
589 if (racl->user_obj != NO_ENTRY)
590 flags |= XMIT_USER_OBJ;
591 if (racl->group_obj != NO_ENTRY)
592 flags |= XMIT_GROUP_OBJ;
593 if (racl->mask_obj != NO_ENTRY)
594 flags |= XMIT_MASK_OBJ;
595 if (racl->other_obj != NO_ENTRY)
596 flags |= XMIT_OTHER_OBJ;
597 if (racl->names.count)
598 flags |= XMIT_NAME_LIST;
600 write_byte(f, flags);
602 if (flags & XMIT_USER_OBJ)
603 write_varint(f, racl->user_obj);
604 if (flags & XMIT_GROUP_OBJ)
605 write_varint(f, racl->group_obj);
606 if (flags & XMIT_MASK_OBJ)
607 write_varint(f, racl->mask_obj);
608 if (flags & XMIT_OTHER_OBJ)
609 write_varint(f, racl->other_obj);
610 if (flags & XMIT_NAME_LIST)
611 send_ida_entries(&racl->names, f);
613 /* Give the allocated data to the new list object. */
615 *racl = empty_rsync_acl;
619 /* Send the ACL from the stat_x structure down the indicated file descriptor.
620 * This also frees the ACL data. */
621 void send_acl(stat_x *sxp, int f)
624 sxp->acc_acl = create_racl();
625 rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode);
627 /* Avoid sending values that can be inferred from other data. */
628 rsync_acl_strip_perms(sxp->acc_acl);
630 send_rsync_acl(sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list, f);
632 if (S_ISDIR(sxp->st.st_mode)) {
634 sxp->def_acl = create_racl();
636 send_rsync_acl(sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list, f);
640 /* === Receive functions === */
642 static uint32 recv_acl_access(uchar *name_follows_ptr, int f)
644 uint32 access = read_varint(f);
646 if (name_follows_ptr) {
647 int flags = access & 3;
649 if (am_root >= 0 && access & ~SMB_ACL_VALID_NAME_BITS)
651 if (flags & XFLAG_NAME_FOLLOWS)
652 *name_follows_ptr = 1;
654 *name_follows_ptr = 0;
655 if (flags & XFLAG_NAME_IS_USER)
656 access |= NAME_IS_USER;
657 } else if (am_root >= 0 && access & ~SMB_ACL_VALID_OBJ_BITS) {
659 rprintf(FERROR, "recv_acl_access: value out of range: %x\n",
661 exit_cleanup(RERR_STREAMIO);
667 static uchar recv_ida_entries(ida_entries *ent, int f)
669 uchar computed_mask_bits = 0;
670 int i, count = read_varint(f);
673 if (!(ent->idas = new_array(id_access, count)))
674 out_of_memory("recv_ida_entries");
680 for (i = 0; i < count; i++) {
682 id_t id = read_varint(f);
683 uint32 access = recv_acl_access(&has_name, f);
686 if (access & NAME_IS_USER)
687 id = recv_user_name(f, id);
689 id = recv_group_name(f, id, NULL);
690 } else if (access & NAME_IS_USER) {
691 if (inc_recurse && am_root && !numeric_ids)
694 if (inc_recurse && (!am_root || !numeric_ids))
695 id = match_gid(id, NULL);
698 ent->idas[i].id = id;
699 ent->idas[i].access = access;
700 computed_mask_bits |= access;
703 return computed_mask_bits & ~NO_ENTRY;
706 static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
708 uchar computed_mask_bits = 0;
711 int ndx = read_varint(f);
713 if (ndx < 0 || (size_t)ndx > racl_list->count) {
714 rprintf(FERROR, "recv_acl_index: %s ACL index %d > %d\n",
715 str_acl_type(type), ndx, (int)racl_list->count);
716 exit_cleanup(RERR_STREAMIO);
722 ndx = racl_list->count;
723 duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
724 duo_item->racl = empty_rsync_acl;
726 flags = read_byte(f);
728 if (flags & XMIT_USER_OBJ)
729 duo_item->racl.user_obj = recv_acl_access(NULL, f);
730 if (flags & XMIT_GROUP_OBJ)
731 duo_item->racl.group_obj = recv_acl_access(NULL, f);
732 if (flags & XMIT_MASK_OBJ)
733 duo_item->racl.mask_obj = recv_acl_access(NULL, f);
734 if (flags & XMIT_OTHER_OBJ)
735 duo_item->racl.other_obj = recv_acl_access(NULL, f);
736 if (flags & XMIT_NAME_LIST)
737 computed_mask_bits |= recv_ida_entries(&duo_item->racl.names, f);
740 /* If we received a superfluous mask, throw it away. */
741 duo_item->racl.mask_obj = NO_ENTRY;
743 if (!duo_item->racl.names.count) {
744 /* If we received a superfluous mask, throw it away. */
745 if (duo_item->racl.mask_obj != NO_ENTRY) {
746 /* Mask off the group perms with it first. */
747 duo_item->racl.group_obj &= duo_item->racl.mask_obj | NO_ENTRY;
748 duo_item->racl.mask_obj = NO_ENTRY;
750 } else if (duo_item->racl.mask_obj == NO_ENTRY) /* Must be non-empty with lists. */
751 duo_item->racl.mask_obj = (computed_mask_bits | duo_item->racl.group_obj) & ~NO_ENTRY;
754 duo_item->sacl = NULL;
759 /* Receive the ACL info the sender has included for this file-list entry. */
760 void receive_acl(struct file_struct *file, int f)
762 F_ACL(file) = recv_rsync_acl(&access_acl_list, SMB_ACL_TYPE_ACCESS, f);
764 if (S_ISDIR(file->mode))
765 F_DIR_DEFACL(file) = recv_rsync_acl(&default_acl_list, SMB_ACL_TYPE_DEFAULT, f);
768 static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list)
774 else if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) == -1) {
776 ndx = racl_list->count;
777 new_duo = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
778 new_duo->racl = *racl;
779 new_duo->sacl = NULL;
780 *racl = empty_rsync_acl;
786 /* Turn the ACL data in stat_x into cached ACL data, setting the index
787 * values in the file struct. */
788 void cache_acl(struct file_struct *file, stat_x *sxp)
790 F_ACL(file) = cache_rsync_acl(sxp->acc_acl,
791 SMB_ACL_TYPE_ACCESS, &access_acl_list);
793 if (S_ISDIR(sxp->st.st_mode)) {
794 F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl,
795 SMB_ACL_TYPE_DEFAULT, &default_acl_list);
799 #ifndef HAVE_OSX_ACLS
800 static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode, mode_t mode)
802 SMB_ACL_ENTRY_T entry;
807 /* If the sticky bit is going on, it's not safe to allow all
808 * the new ACL to go into effect before it gets set. */
809 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
813 if (mode & S_ISVTX && !(old_mode & S_ISVTX))
816 /* If setuid or setgid is going off, it's not safe to allow all
817 * the new ACL to go into effect before they get cleared. */
818 if ((old_mode & S_ISUID && !(mode & S_ISUID))
819 || (old_mode & S_ISGID && !(mode & S_ISGID)))
824 errfun = "sys_acl_get_entry";
825 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
827 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
828 SMB_ACL_TAG_T tag_type;
829 if ((rc = sys_acl_get_tag_type(entry, &tag_type)) != 0) {
830 errfun = "sys_acl_get_tag_type";
834 case SMB_ACL_USER_OBJ:
835 COE2( store_access_in_entry,((mode >> 6) & 7, entry) );
837 case SMB_ACL_GROUP_OBJ:
838 /* group is only empty when identical to group perms. */
839 if (racl->group_obj != NO_ENTRY)
841 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
844 #ifndef ACLS_NEED_MASK
845 /* mask is only empty when we don't need it. */
846 if (racl->mask_obj == NO_ENTRY)
849 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
852 COE2( store_access_in_entry,(mode & 7, entry) );
859 rsyserr(FERROR, errno, "change_sacl_perms: %s()",
865 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
866 /* Ensure that chmod() will be called to restore any lost setid bits. */
867 if (old_mode & (S_ISUID | S_ISGID | S_ISVTX)
868 && BITS_EQUAL(old_mode, mode, CHMOD_BITS))
869 old_mode &= ~(S_ISUID | S_ISGID | S_ISVTX);
872 /* Return the mode of the file on disk, as we will set them. */
873 return (old_mode & ~ACCESSPERMS) | (mode & ACCESSPERMS);
877 static int set_rsync_acl(const char *fname, acl_duo *duo_item,
878 SMB_ACL_TYPE_T type, stat_x *sxp, mode_t mode)
880 if (type == SMB_ACL_TYPE_DEFAULT
881 && duo_item->racl.user_obj == NO_ENTRY) {
883 #ifdef SUPPORT_XATTRS
884 /* --fake-super support: delete default ACL from xattrs. */
886 rc = del_def_xattr_acl(fname);
889 rc = sys_acl_delete_def_file(fname);
891 rsyserr(FERROR, errno, "set_acl: sys_acl_delete_def_file(%s)",
895 #ifdef SUPPORT_XATTRS
896 } else if (am_root < 0) {
897 /* --fake-super support: store ACLs in an xattr. */
898 int cnt = duo_item->racl.names.count;
899 size_t len = 4*4 + cnt * (4+4);
900 char *buf = new_array(char, len);
903 SIVAL(buf, 0, duo_item->racl.user_obj);
904 SIVAL(buf, 4, duo_item->racl.group_obj);
905 SIVAL(buf, 8, duo_item->racl.mask_obj);
906 SIVAL(buf, 12, duo_item->racl.other_obj);
909 char *bp = buf + 4*4;
910 id_access *ida = duo_item->racl.names.idas;
911 for ( ; cnt--; ida++, bp += 4+4) {
912 SIVAL(bp, 0, ida->id);
913 SIVAL(bp, 4, ida->access);
916 rc = set_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, buf, len);
921 mode_t cur_mode = sxp->st.st_mode;
923 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
926 mode = 0; /* eliminate compiler warning */
928 if (type == SMB_ACL_TYPE_ACCESS) {
929 cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl,
931 if (cur_mode == (mode_t)~0)
935 if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) {
936 rsyserr(FERROR, errno, "set_acl: sys_acl_set_file(%s, %s)",
937 fname, str_acl_type(type));
940 if (type == SMB_ACL_TYPE_ACCESS)
941 sxp->st.st_mode = cur_mode;
947 /* Set ACL on indicated filename.
949 * This sets extended access ACL entries and default ACL. If convenient,
950 * it sets permission bits along with the access ACL and signals having
951 * done so by modifying sxp->st.st_mode.
953 * Returns 1 for unchanged, 0 for changed, -1 for failed. Call this
954 * with fname set to NULL to just check if the ACL is unchanged. */
955 int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp)
961 if (!dry_run && (read_only || list_only)) {
967 if (ndx >= 0 && (size_t)ndx < access_acl_list.count) {
968 acl_duo *duo_item = access_acl_list.items;
971 && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, file->mode);
974 if (!dry_run && fname
975 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS,
976 sxp, file->mode) < 0)
981 if (!S_ISDIR(sxp->st.st_mode))
984 ndx = F_DIR_DEFACL(file);
985 if (ndx >= 0 && (size_t)ndx < default_acl_list.count) {
986 acl_duo *duo_item = default_acl_list.items;
988 eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl);
992 if (!dry_run && fname
993 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT,
994 sxp, file->mode) < 0)
1002 /* Non-incremental recursion needs to convert all the received IDs.
1003 * This is done in a single pass after receiving the whole file-list. */
1004 static void match_racl_ids(const item_list *racl_list)
1006 int list_cnt, name_cnt;
1007 acl_duo *duo_item = racl_list->items;
1008 for (list_cnt = racl_list->count; list_cnt--; duo_item++) {
1009 ida_entries *idal = &duo_item->racl.names;
1010 id_access *ida = idal->idas;
1011 for (name_cnt = idal->count; name_cnt--; ida++) {
1012 if (ida->access & NAME_IS_USER)
1013 ida->id = match_uid(ida->id);
1015 ida->id = match_gid(ida->id, NULL);
1020 void match_acl_ids(void)
1022 match_racl_ids(&access_acl_list);
1023 match_racl_ids(&default_acl_list);
1026 /* This is used by dest_mode(). */
1027 int default_perms_for_dir(const char *dir)
1036 perms = ACCESSPERMS & ~orig_umask;
1037 /* Read the directory's default ACL. If it has none, this will successfully return an empty ACL. */
1038 sacl = sys_acl_get_file(dir, SMB_ACL_TYPE_DEFAULT);
1040 /* Couldn't get an ACL. Darn. */
1046 /* No ACLs are available. */
1050 /* We're doing a dry run, so the containing directory
1051 * wasn't actually created. Don't worry about it. */
1054 /* Otherwise fall through. */
1056 rprintf(FERROR, "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
1057 dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno));
1063 racl = empty_rsync_acl;
1064 ok = unpack_smb_acl(sacl, &racl);
1065 sys_acl_free_acl(sacl);
1067 rprintf(FERROR, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
1071 /* Apply the permission-bit entries of the default ACL, if any. */
1072 if (racl.user_obj != NO_ENTRY) {
1073 perms = rsync_acl_get_perms(&racl);
1075 rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir);
1078 rsync_acl_free(&racl);
1082 #endif /* SUPPORT_ACLS */