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)
470 SMB_ACL_T sacl = sys_acl_get_file(fname, type);
473 BOOL ok = unpack_smb_acl(sacl, racl);
475 sys_acl_free_acl(sacl);
479 } else if (no_acl_syscall_error(errno)) {
480 /* ACLs are not supported, so pretend we have a basic ACL. */
481 if (type == SMB_ACL_TYPE_ACCESS)
482 rsync_acl_fake_perms(racl, mode);
484 rsyserr(FERROR, errno, "get_acl: sys_acl_get_file(%s, %s)",
485 fname, str_acl_type(type));
492 /* Return the Access Control List for the given filename. */
493 int get_acl(const char *fname, stat_x *sxp)
495 sxp->acc_acl = create_racl();
496 if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS,
497 sxp->st.st_mode) < 0) {
502 if (S_ISDIR(sxp->st.st_mode)) {
503 sxp->def_acl = create_racl();
504 if (get_rsync_acl(fname, sxp->def_acl, SMB_ACL_TYPE_DEFAULT,
505 sxp->st.st_mode) < 0) {
514 /* === Send functions === */
516 /* Send the ida list over the file descriptor. */
517 static void send_ida_entries(const ida_entries *idal, int f)
520 size_t count = idal->count;
522 write_varint(f, idal->count);
524 for (ida = idal->idas; count--; ida++) {
525 uint32 xbits = ida->access << 2;
527 if (ida->access & NAME_IS_USER) {
528 xbits |= XFLAG_NAME_IS_USER;
529 name = add_uid(ida->id);
531 name = add_gid(ida->id);
532 write_varint(f, ida->id);
533 if (inc_recurse && name) {
534 int len = strlen(name);
535 write_varint(f, xbits | XFLAG_NAME_FOLLOWS);
537 write_buf(f, name, len);
539 write_varint(f, xbits);
543 static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type,
544 item_list *racl_list, int f)
546 int ndx = find_matching_rsync_acl(racl, type, racl_list);
548 /* Send 0 (-1 + 1) to indicate that literal ACL data follows. */
549 write_varint(f, ndx + 1);
552 rsync_acl *new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000);
555 if (racl->user_obj != NO_ENTRY)
556 flags |= XMIT_USER_OBJ;
557 if (racl->group_obj != NO_ENTRY)
558 flags |= XMIT_GROUP_OBJ;
559 if (racl->mask_obj != NO_ENTRY)
560 flags |= XMIT_MASK_OBJ;
561 if (racl->other_obj != NO_ENTRY)
562 flags |= XMIT_OTHER_OBJ;
563 if (racl->names.count)
564 flags |= XMIT_NAME_LIST;
566 write_byte(f, flags);
568 if (flags & XMIT_USER_OBJ)
569 write_varint(f, racl->user_obj);
570 if (flags & XMIT_GROUP_OBJ)
571 write_varint(f, racl->group_obj);
572 if (flags & XMIT_MASK_OBJ)
573 write_varint(f, racl->mask_obj);
574 if (flags & XMIT_OTHER_OBJ)
575 write_varint(f, racl->other_obj);
576 if (flags & XMIT_NAME_LIST)
577 send_ida_entries(&racl->names, f);
579 /* Give the allocated data to the new list object. */
581 *racl = empty_rsync_acl;
585 /* Send the ACL from the stat_x structure down the indicated file descriptor.
586 * This also frees the ACL data. */
587 void send_acl(stat_x *sxp, int f)
590 sxp->acc_acl = create_racl();
591 rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode);
593 /* Avoid sending values that can be inferred from other data. */
594 rsync_acl_strip_perms(sxp->acc_acl);
596 send_rsync_acl(sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list, f);
598 if (S_ISDIR(sxp->st.st_mode)) {
600 sxp->def_acl = create_racl();
602 send_rsync_acl(sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list, f);
606 /* === Receive functions === */
608 static uint32 recv_acl_access(uchar *name_follows_ptr, int f)
610 uint32 access = read_varint(f);
612 if (name_follows_ptr) {
613 int flags = access & 3;
615 if (access & ~SMB_ACL_VALID_NAME_BITS)
617 if (flags & XFLAG_NAME_FOLLOWS)
618 *name_follows_ptr = 1;
620 *name_follows_ptr = 0;
621 if (flags & XFLAG_NAME_IS_USER)
622 access |= NAME_IS_USER;
623 } else if (access & ~SMB_ACL_VALID_OBJ_BITS) {
625 rprintf(FERROR, "recv_acl_access: value out of range: %x\n",
627 exit_cleanup(RERR_STREAMIO);
633 static uchar recv_ida_entries(ida_entries *ent, int f)
635 uchar computed_mask_bits = 0;
636 int i, count = read_varint(f);
639 if (!(ent->idas = new_array(id_access, count)))
640 out_of_memory("recv_ida_entries");
646 for (i = 0; i < count; i++) {
648 id_t id = read_varint(f);
649 uint32 access = recv_acl_access(&has_name, f);
652 if (access & NAME_IS_USER)
653 id = recv_user_name(f, id);
655 id = recv_group_name(f, id, NULL);
656 } else if (access & NAME_IS_USER) {
657 if (inc_recurse && am_root && !numeric_ids)
660 if (inc_recurse && (!am_root || !numeric_ids))
661 id = match_gid(id, NULL);
664 ent->idas[i].id = id;
665 ent->idas[i].access = access;
666 computed_mask_bits |= access;
669 return computed_mask_bits & ~NO_ENTRY;
672 static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f)
674 uchar computed_mask_bits = 0;
677 int ndx = read_varint(f);
679 if (ndx < 0 || (size_t)ndx > racl_list->count) {
680 rprintf(FERROR, "recv_acl_index: %s ACL index %d > %d\n",
681 str_acl_type(type), ndx, (int)racl_list->count);
682 exit_cleanup(RERR_STREAMIO);
688 ndx = racl_list->count;
689 duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
690 duo_item->racl = empty_rsync_acl;
692 flags = read_byte(f);
694 if (flags & XMIT_USER_OBJ)
695 duo_item->racl.user_obj = recv_acl_access(NULL, f);
696 if (flags & XMIT_GROUP_OBJ)
697 duo_item->racl.group_obj = recv_acl_access(NULL, f);
698 if (flags & XMIT_MASK_OBJ)
699 duo_item->racl.mask_obj = recv_acl_access(NULL, f);
700 if (flags & XMIT_OTHER_OBJ)
701 duo_item->racl.other_obj = recv_acl_access(NULL, f);
702 if (flags & XMIT_NAME_LIST)
703 computed_mask_bits |= recv_ida_entries(&duo_item->racl.names, f);
705 if (!duo_item->racl.names.count) {
706 /* If we received a superfluous mask, throw it away. */
707 if (duo_item->racl.mask_obj != NO_ENTRY) {
708 /* Mask off the group perms with it first. */
709 duo_item->racl.group_obj &= duo_item->racl.mask_obj | NO_ENTRY;
710 duo_item->racl.mask_obj = NO_ENTRY;
713 #ifndef HAVE_OSX_ACLS
714 else if (duo_item->racl.mask_obj == NO_ENTRY) /* Must be non-empty with lists. */
715 duo_item->racl.mask_obj = (computed_mask_bits | duo_item->racl.group_obj) & ~NO_ENTRY;
718 duo_item->sacl = NULL;
723 /* Receive the ACL info the sender has included for this file-list entry. */
724 void receive_acl(struct file_struct *file, int f)
726 F_ACL(file) = recv_rsync_acl(&access_acl_list, SMB_ACL_TYPE_ACCESS, f);
728 if (S_ISDIR(file->mode))
729 F_DIR_DEFACL(file) = recv_rsync_acl(&default_acl_list, SMB_ACL_TYPE_DEFAULT, f);
732 static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list)
738 else if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) == -1) {
740 ndx = racl_list->count;
741 new_duo = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
742 new_duo->racl = *racl;
743 new_duo->sacl = NULL;
744 *racl = empty_rsync_acl;
750 /* Turn the ACL data in stat_x into cached ACL data, setting the index
751 * values in the file struct. */
752 void cache_acl(struct file_struct *file, stat_x *sxp)
754 F_ACL(file) = cache_rsync_acl(sxp->acc_acl,
755 SMB_ACL_TYPE_ACCESS, &access_acl_list);
757 if (S_ISDIR(sxp->st.st_mode)) {
758 F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl,
759 SMB_ACL_TYPE_DEFAULT, &default_acl_list);
763 #ifndef HAVE_OSX_ACLS
764 static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode, mode_t mode)
766 SMB_ACL_ENTRY_T entry;
771 /* If the sticky bit is going on, it's not safe to allow all
772 * the new ACL to go into effect before it gets set. */
773 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
777 if (mode & S_ISVTX && !(old_mode & S_ISVTX))
780 /* If setuid or setgid is going off, it's not safe to allow all
781 * the new ACL to go into effect before they get cleared. */
782 if ((old_mode & S_ISUID && !(mode & S_ISUID))
783 || (old_mode & S_ISGID && !(mode & S_ISGID)))
788 errfun = "sys_acl_get_entry";
789 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
791 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
792 SMB_ACL_TAG_T tag_type;
793 if ((rc = sys_acl_get_tag_type(entry, &tag_type)) != 0) {
794 errfun = "sys_acl_get_tag_type";
798 case SMB_ACL_USER_OBJ:
799 COE2( store_access_in_entry,((mode >> 6) & 7, entry) );
801 case SMB_ACL_GROUP_OBJ:
802 /* group is only empty when identical to group perms. */
803 if (racl->group_obj != NO_ENTRY)
805 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
808 #ifndef ACLS_NEED_MASK
809 /* mask is only empty when we don't need it. */
810 if (racl->mask_obj == NO_ENTRY)
813 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
816 COE2( store_access_in_entry,(mode & 7, entry) );
823 rsyserr(FERROR, errno, "change_sacl_perms: %s()",
829 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
830 /* Ensure that chmod() will be called to restore any lost setid bits. */
831 if (old_mode & (S_ISUID | S_ISGID | S_ISVTX)
832 && BITS_EQUAL(old_mode, mode, CHMOD_BITS))
833 old_mode &= ~(S_ISUID | S_ISGID | S_ISVTX);
836 /* Return the mode of the file on disk, as we will set them. */
837 return (old_mode & ~ACCESSPERMS) | (mode & ACCESSPERMS);
841 static int set_rsync_acl(const char *fname, acl_duo *duo_item,
842 SMB_ACL_TYPE_T type, stat_x *sxp, mode_t mode)
844 if (type == SMB_ACL_TYPE_DEFAULT
845 && duo_item->racl.user_obj == NO_ENTRY) {
846 if (sys_acl_delete_def_file(fname) < 0) {
847 rsyserr(FERROR, errno, "set_acl: sys_acl_delete_def_file(%s)",
852 mode_t cur_mode = sxp->st.st_mode;
854 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
857 mode = 0; /* eliminate compiler warning */
859 if (type == SMB_ACL_TYPE_ACCESS) {
860 cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl,
862 if (cur_mode == (mode_t)~0)
866 if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) {
867 rsyserr(FERROR, errno, "set_acl: sys_acl_set_file(%s, %s)",
868 fname, str_acl_type(type));
871 if (type == SMB_ACL_TYPE_ACCESS)
872 sxp->st.st_mode = cur_mode;
878 /* Set ACL on indicated filename.
880 * This sets extended access ACL entries and default ACL. If convenient,
881 * it sets permission bits along with the access ACL and signals having
882 * done so by modifying sxp->st.st_mode.
884 * Returns 1 for unchanged, 0 for changed, -1 for failed. Call this
885 * with fname set to NULL to just check if the ACL is unchanged. */
886 int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp)
892 if (!dry_run && (read_only || list_only)) {
898 if (ndx >= 0 && (size_t)ndx < access_acl_list.count) {
899 acl_duo *duo_item = access_acl_list.items;
902 && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, file->mode);
905 if (!dry_run && fname
906 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS,
907 sxp, file->mode) < 0)
912 if (!S_ISDIR(sxp->st.st_mode))
915 ndx = F_DIR_DEFACL(file);
916 if (ndx >= 0 && (size_t)ndx < default_acl_list.count) {
917 acl_duo *duo_item = default_acl_list.items;
919 eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl);
923 if (!dry_run && fname
924 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT,
925 sxp, file->mode) < 0)
933 /* Non-incremental recursion needs to convert all the received IDs.
934 * This is done in a single pass after receiving the whole file-list. */
935 static void match_racl_ids(const item_list *racl_list)
937 int list_cnt, name_cnt;
938 acl_duo *duo_item = racl_list->items;
939 for (list_cnt = racl_list->count; list_cnt--; duo_item++) {
940 ida_entries *idal = &duo_item->racl.names;
941 id_access *ida = idal->idas;
942 for (name_cnt = idal->count; name_cnt--; ida++) {
943 if (ida->access & NAME_IS_USER)
944 ida->id = match_uid(ida->id);
946 ida->id = match_gid(ida->id, NULL);
951 void match_acl_ids(void)
953 match_racl_ids(&access_acl_list);
954 match_racl_ids(&default_acl_list);
957 /* This is used by dest_mode(). */
958 int default_perms_for_dir(const char *dir)
967 perms = ACCESSPERMS & ~orig_umask;
968 /* Read the directory's default ACL. If it has none, this will successfully return an empty ACL. */
969 sacl = sys_acl_get_file(dir, SMB_ACL_TYPE_DEFAULT);
971 /* Couldn't get an ACL. Darn. */
977 /* No ACLs are available. */
981 /* We're doing a dry run, so the containing directory
982 * wasn't actually created. Don't worry about it. */
985 /* Otherwise fall through. */
987 rprintf(FERROR, "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
988 dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno));
994 racl = empty_rsync_acl;
995 ok = unpack_smb_acl(sacl, &racl);
996 sys_acl_free_acl(sacl);
998 rprintf(FERROR, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
1002 /* Apply the permission-bit entries of the default ACL, if any. */
1003 if (racl.user_obj != NO_ENTRY) {
1004 perms = rsync_acl_get_perms(&racl);
1006 rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir);
1009 rsync_acl_free(&racl);
1013 #endif /* SUPPORT_ACLS */