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;
34 extern int preserve_devices;
35 extern int preserve_specials;
37 /* Flags used to indicate what items are being transmitted for an entry. */
38 #define XMIT_USER_OBJ (1<<0)
39 #define XMIT_GROUP_OBJ (1<<1)
40 #define XMIT_MASK_OBJ (1<<2)
41 #define XMIT_OTHER_OBJ (1<<3)
42 #define XMIT_NAME_LIST (1<<4)
44 #define NO_ENTRY ((uchar)0x80) /* Default value of a NON-name-list entry. */
46 #define NAME_IS_USER (1u<<31) /* Bit used only on a name-list entry. */
48 /* When we send the access bits over the wire, we shift them 2 bits to the
49 * left and use the lower 2 bits as flags (relevant only to a name entry).
50 * This makes the protocol more efficient than sending a value that would
51 * be likely to have its hightest bits set. */
52 #define XFLAG_NAME_FOLLOWS 0x0001u
53 #define XFLAG_NAME_IS_USER 0x0002u
55 /* === ACL structures === */
72 typedef struct rsync_acl {
74 /* These will be NO_ENTRY if there's no such entry. */
86 static const rsync_acl empty_rsync_acl = {
87 {NULL, 0}, NO_ENTRY, NO_ENTRY, NO_ENTRY, NO_ENTRY
90 static item_list access_acl_list = EMPTY_ITEM_LIST;
91 static item_list default_acl_list = EMPTY_ITEM_LIST;
93 static size_t prior_access_count = (size_t)-1;
94 static size_t prior_default_count = (size_t)-1;
96 /* === Calculations on ACL types === */
98 static const char *str_acl_type(SMB_ACL_TYPE_T type)
101 case SMB_ACL_TYPE_ACCESS:
103 return "ACL_TYPE_EXTENDED";
105 return "ACL_TYPE_ACCESS";
107 case SMB_ACL_TYPE_DEFAULT:
108 return "ACL_TYPE_DEFAULT";
112 return "unknown ACL type!";
115 static int calc_sacl_entries(const rsync_acl *racl)
117 /* A System ACL always gets user/group/other permission entries. */
118 return racl->names.count
119 #ifdef ACLS_NEED_MASK
122 + (racl->mask_obj != NO_ENTRY)
127 /* Extracts and returns the permission bits from the ACL. This cannot be
128 * called on an rsync_acl that has NO_ENTRY in any spot but the mask. */
129 static int rsync_acl_get_perms(const rsync_acl *racl)
131 return (racl->user_obj << 6)
132 + ((racl->mask_obj != NO_ENTRY ? racl->mask_obj : racl->group_obj) << 3)
136 /* Removes the permission-bit entries from the ACL because these
137 * can be reconstructed from the file's mode. */
138 static void rsync_acl_strip_perms(stat_x *sxp)
140 rsync_acl *racl = sxp->acc_acl;
142 racl->user_obj = NO_ENTRY;
143 if (racl->mask_obj == NO_ENTRY)
144 racl->group_obj = NO_ENTRY;
146 int group_perms = (sxp->st.st_mode >> 3) & 7;
147 if (racl->group_obj == group_perms)
148 racl->group_obj = NO_ENTRY;
149 #ifndef HAVE_SOLARIS_ACLS
150 if (racl->names.count != 0 && racl->mask_obj == group_perms)
151 racl->mask_obj = NO_ENTRY;
154 racl->other_obj = NO_ENTRY;
157 /* Given an empty rsync_acl, fake up the permission bits. */
158 static void rsync_acl_fake_perms(rsync_acl *racl, mode_t mode)
160 racl->user_obj = (mode >> 6) & 7;
161 racl->group_obj = (mode >> 3) & 7;
162 racl->other_obj = mode & 7;
165 /* === Rsync ACL functions === */
167 static rsync_acl *create_racl(void)
169 rsync_acl *racl = new(rsync_acl);
172 out_of_memory("create_racl");
173 *racl = empty_rsync_acl;
178 static BOOL ida_entries_equal(const ida_entries *ial1, const ida_entries *ial2)
180 id_access *ida1, *ida2;
181 int count = ial1->count;
182 if (count != ial2->count)
186 for (; count--; ida1++, ida2++) {
187 if (ida1->access != ida2->access || ida1->id != ida2->id)
193 static BOOL rsync_acl_equal(const rsync_acl *racl1, const rsync_acl *racl2)
195 return racl1->user_obj == racl2->user_obj
196 && racl1->group_obj == racl2->group_obj
197 && racl1->mask_obj == racl2->mask_obj
198 && racl1->other_obj == racl2->other_obj
199 && ida_entries_equal(&racl1->names, &racl2->names);
202 /* Are the extended (non-permission-bit) entries equal? If so, the rest of
203 * the ACL will be handled by the normal mode-preservation code. This is
204 * only meaningful for access ACLs! Note: the 1st arg is a fully-populated
205 * rsync_acl, but the 2nd parameter can be a condensed rsync_acl, which means
206 * that it might have several of its permission objects set to NO_ENTRY. */
207 static BOOL rsync_acl_equal_enough(const rsync_acl *racl1,
208 const rsync_acl *racl2, mode_t m)
210 if ((racl1->mask_obj ^ racl2->mask_obj) & NO_ENTRY)
211 return False; /* One has a mask and the other doesn't */
213 /* When there's a mask, the group_obj becomes an extended entry. */
214 if (racl1->mask_obj != NO_ENTRY) {
215 /* A condensed rsync_acl with a mask can only have no
216 * group_obj when it was identical to the mask. This
217 * means that it was also identical to the group attrs
219 if (racl2->group_obj == NO_ENTRY) {
220 if (racl1->group_obj != ((m >> 3) & 7))
222 } else if (racl1->group_obj != racl2->group_obj)
225 return ida_entries_equal(&racl1->names, &racl2->names);
228 static void rsync_acl_free(rsync_acl *racl)
230 if (racl->names.idas)
231 free(racl->names.idas);
232 *racl = empty_rsync_acl;
235 void free_acl(stat_x *sxp)
238 rsync_acl_free(sxp->acc_acl);
243 rsync_acl_free(sxp->def_acl);
249 #ifdef SMB_ACL_NEED_SORT
250 static int id_access_sorter(const void *r1, const void *r2)
252 id_access *ida1 = (id_access *)r1;
253 id_access *ida2 = (id_access *)r2;
254 id_t rid1 = ida1->id, rid2 = ida2->id;
255 if ((ida1->access ^ ida2->access) & NAME_IS_USER)
256 return ida1->access & NAME_IS_USER ? -1 : 1;
257 return rid1 == rid2 ? 0 : rid1 < rid2 ? -1 : 1;
261 /* === System ACLs === */
263 /* Unpack system ACL -> rsync ACL verbatim. Return whether we succeeded. */
264 static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl)
266 static item_list temp_ida_list = EMPTY_ITEM_LIST;
267 SMB_ACL_ENTRY_T entry;
271 errfun = "sys_acl_get_entry";
272 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
274 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
275 SMB_ACL_TAG_T tag_type;
279 if ((rc = sys_acl_get_info(entry, &tag_type, &access, &g_u_id)) != 0) {
280 errfun = "sys_acl_get_info";
283 /* continue == done with entry; break == store in temporary ida list */
285 #ifndef HAVE_OSX_ACLS
286 case SMB_ACL_USER_OBJ:
287 if (racl->user_obj == NO_ENTRY)
288 racl->user_obj = access;
290 rprintf(FINFO, "unpack_smb_acl: warning: duplicate USER_OBJ entry ignored\n");
292 case SMB_ACL_GROUP_OBJ:
293 if (racl->group_obj == NO_ENTRY)
294 racl->group_obj = access;
296 rprintf(FINFO, "unpack_smb_acl: warning: duplicate GROUP_OBJ entry ignored\n");
299 if (racl->mask_obj == NO_ENTRY)
300 racl->mask_obj = access;
302 rprintf(FINFO, "unpack_smb_acl: warning: duplicate MASK entry ignored\n");
305 if (racl->other_obj == NO_ENTRY)
306 racl->other_obj = access;
308 rprintf(FINFO, "unpack_smb_acl: warning: duplicate OTHER entry ignored\n");
312 access |= NAME_IS_USER;
317 rprintf(FINFO, "unpack_smb_acl: warning: entry with unrecognized tag type ignored\n");
320 ida = EXPAND_ITEM_LIST(&temp_ida_list, id_access, -10);
322 ida->access = access;
325 rsyserr(FERROR_XFER, errno, "unpack_smb_acl: %s()", errfun);
326 rsync_acl_free(racl);
330 /* Transfer the count id_access items out of the temp_ida_list
331 * into the names ida_entries list in racl. */
332 if (temp_ida_list.count) {
333 #ifdef SMB_ACL_NEED_SORT
334 if (temp_ida_list.count > 1) {
335 qsort(temp_ida_list.items, temp_ida_list.count,
336 sizeof (id_access), id_access_sorter);
339 if (!(racl->names.idas = new_array(id_access, temp_ida_list.count)))
340 out_of_memory("unpack_smb_acl");
341 memcpy(racl->names.idas, temp_ida_list.items,
342 temp_ida_list.count * sizeof (id_access));
344 racl->names.idas = NULL;
346 racl->names.count = temp_ida_list.count;
348 /* Truncate the temporary list now that its idas have been saved. */
349 temp_ida_list.count = 0;
354 /* Synactic sugar for system calls */
356 #define CALL_OR_ERROR(func,args,str) \
364 #define COE(func,args) CALL_OR_ERROR(func,args,#func)
365 #define COE2(func,args) CALL_OR_ERROR(func,args,NULL)
367 #ifndef HAVE_OSX_ACLS
368 /* Store the permissions in the system ACL entry. */
369 static int store_access_in_entry(uint32 access, SMB_ACL_ENTRY_T entry)
371 if (sys_acl_set_access_bits(entry, access)) {
372 rsyserr(FERROR_XFER, errno, "store_access_in_entry sys_acl_set_access_bits()");
379 /* Pack rsync ACL -> system ACL verbatim. Return whether we succeeded. */
380 static BOOL pack_smb_acl(SMB_ACL_T *smb_acl, const rsync_acl *racl)
382 #ifdef ACLS_NEED_MASK
387 const char *errfun = NULL;
388 SMB_ACL_ENTRY_T entry;
390 if (!(*smb_acl = sys_acl_init(calc_sacl_entries(racl)))) {
391 rsyserr(FERROR_XFER, errno, "pack_smb_acl: sys_acl_init()");
395 #ifndef HAVE_OSX_ACLS
396 COE( sys_acl_create_entry,(smb_acl, &entry) );
397 COE( sys_acl_set_info,(entry, SMB_ACL_USER_OBJ, racl->user_obj & ~NO_ENTRY, 0) );
400 for (ida = racl->names.idas, count = racl->names.count; count; ida++, count--) {
401 #ifdef SMB_ACL_NEED_SORT
402 if (!(ida->access & NAME_IS_USER))
405 COE( sys_acl_create_entry,(smb_acl, &entry) );
406 COE( sys_acl_set_info,
408 ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP,
409 ida->access & ~NAME_IS_USER, ida->id) );
412 #ifndef HAVE_OSX_ACLS
413 COE( sys_acl_create_entry,(smb_acl, &entry) );
414 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP_OBJ, racl->group_obj & ~NO_ENTRY, 0) );
416 #ifdef SMB_ACL_NEED_SORT
417 for ( ; count; ida++, count--) {
418 COE( sys_acl_create_entry,(smb_acl, &entry) );
419 COE( sys_acl_set_info,(entry, SMB_ACL_GROUP, ida->access, ida->id) );
423 #ifdef ACLS_NEED_MASK
424 mask_bits = racl->mask_obj == NO_ENTRY ? racl->group_obj & ~NO_ENTRY : racl->mask_obj;
425 COE( sys_acl_create_entry,(smb_acl, &entry) );
426 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, NULL) );
428 if (racl->mask_obj != NO_ENTRY) {
429 COE( sys_acl_create_entry,(smb_acl, &entry) );
430 COE( sys_acl_set_info,(entry, SMB_ACL_MASK, racl->mask_obj, 0) );
434 COE( sys_acl_create_entry,(smb_acl, &entry) );
435 COE( sys_acl_set_info,(entry, SMB_ACL_OTHER, racl->other_obj & ~NO_ENTRY, 0) );
439 if (sys_acl_valid(*smb_acl) < 0)
440 rprintf(FERROR_XFER, "pack_smb_acl: warning: system says the ACL I packed is invalid\n");
447 rsyserr(FERROR_XFER, errno, "pack_smb_acl %s()", errfun);
449 sys_acl_free_acl(*smb_acl);
453 static int find_matching_rsync_acl(const rsync_acl *racl, SMB_ACL_TYPE_T type,
454 const item_list *racl_list)
456 static int access_match = -1, default_match = -1;
457 int *match = type == SMB_ACL_TYPE_ACCESS ? &access_match : &default_match;
458 size_t count = racl_list->count;
460 /* If this is the first time through or we didn't match the last
461 * time, then start at the end of the list, which should be the
462 * best place to start hunting. */
464 *match = racl_list->count - 1;
466 rsync_acl *base = racl_list->items;
467 if (rsync_acl_equal(base + *match, racl))
470 *match = racl_list->count - 1;
477 static int get_rsync_acl(const char *fname, rsync_acl *racl,
478 SMB_ACL_TYPE_T type, mode_t mode)
482 #ifdef SUPPORT_XATTRS
483 /* --fake-super support: load ACLs from an xattr. */
489 if ((buf = get_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, &len)) == NULL)
491 cnt = (len - 4*4) / (4+4);
492 if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4) {
497 racl->user_obj = IVAL(buf, 0);
498 racl->group_obj = IVAL(buf, 4);
499 racl->mask_obj = IVAL(buf, 8);
500 racl->other_obj = IVAL(buf, 12);
503 char *bp = buf + 4*4;
505 if (!(ida = racl->names.idas = new_array(id_access, cnt)))
506 out_of_memory("get_rsync_acl");
507 racl->names.count = cnt;
508 for ( ; cnt--; ida++, bp += 4+4) {
509 ida->id = IVAL(bp, 0);
510 ida->access = IVAL(bp, 4);
518 if ((sacl = sys_acl_get_file(fname, type)) != 0) {
519 BOOL ok = unpack_smb_acl(sacl, racl);
521 sys_acl_free_acl(sacl);
525 } else if (no_acl_syscall_error(errno)) {
526 /* ACLs are not supported, so pretend we have a basic ACL. */
527 if (type == SMB_ACL_TYPE_ACCESS)
528 rsync_acl_fake_perms(racl, mode);
530 rsyserr(FERROR_XFER, errno, "get_acl: sys_acl_get_file(%s, %s)",
531 fname, str_acl_type(type));
538 /* Return the Access Control List for the given filename. */
539 int get_acl(const char *fname, stat_x *sxp)
541 sxp->acc_acl = create_racl();
543 if (S_ISREG(sxp->st.st_mode) || S_ISDIR(sxp->st.st_mode)) {
544 /* Everyone supports this. */
545 } else if (S_ISLNK(sxp->st.st_mode)) {
547 } else if (IS_SPECIAL(sxp->st.st_mode)) {
548 #ifndef NO_SPECIAL_ACLS
549 if (!preserve_specials)
552 } else if (IS_DEVICE(sxp->st.st_mode)) {
553 #ifndef NO_DEVICE_ACLS
554 if (!preserve_devices)
559 if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS,
560 sxp->st.st_mode) < 0) {
565 if (S_ISDIR(sxp->st.st_mode)) {
566 sxp->def_acl = create_racl();
567 if (get_rsync_acl(fname, sxp->def_acl, SMB_ACL_TYPE_DEFAULT,
568 sxp->st.st_mode) < 0) {
577 /* === Send functions === */
579 /* Send the ida list over the file descriptor. */
580 static void send_ida_entries(int f, const ida_entries *idal)
583 size_t count = idal->count;
585 write_varint(f, idal->count);
587 for (ida = idal->idas; count--; ida++) {
588 uint32 xbits = ida->access << 2;
590 if (ida->access & NAME_IS_USER) {
591 xbits |= XFLAG_NAME_IS_USER;
592 name = add_uid(ida->id);
594 name = add_gid(ida->id);
595 write_varint(f, ida->id);
596 if (inc_recurse && name) {
597 int len = strlen(name);
598 write_varint(f, xbits | XFLAG_NAME_FOLLOWS);
600 write_buf(f, name, len);
602 write_varint(f, xbits);
606 static void send_rsync_acl(int f, rsync_acl *racl, SMB_ACL_TYPE_T type,
607 item_list *racl_list)
609 int ndx = find_matching_rsync_acl(racl, type, racl_list);
611 /* Send 0 (-1 + 1) to indicate that literal ACL data follows. */
612 write_varint(f, ndx + 1);
615 rsync_acl *new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000);
618 if (racl->user_obj != NO_ENTRY)
619 flags |= XMIT_USER_OBJ;
620 if (racl->group_obj != NO_ENTRY)
621 flags |= XMIT_GROUP_OBJ;
622 if (racl->mask_obj != NO_ENTRY)
623 flags |= XMIT_MASK_OBJ;
624 if (racl->other_obj != NO_ENTRY)
625 flags |= XMIT_OTHER_OBJ;
626 if (racl->names.count)
627 flags |= XMIT_NAME_LIST;
629 write_byte(f, flags);
631 if (flags & XMIT_USER_OBJ)
632 write_varint(f, racl->user_obj);
633 if (flags & XMIT_GROUP_OBJ)
634 write_varint(f, racl->group_obj);
635 if (flags & XMIT_MASK_OBJ)
636 write_varint(f, racl->mask_obj);
637 if (flags & XMIT_OTHER_OBJ)
638 write_varint(f, racl->other_obj);
639 if (flags & XMIT_NAME_LIST)
640 send_ida_entries(f, &racl->names);
642 /* Give the allocated data to the new list object. */
644 *racl = empty_rsync_acl;
648 /* Send the ACL from the stat_x structure down the indicated file descriptor.
649 * This also frees the ACL data. */
650 void send_acl(int f, stat_x *sxp)
653 sxp->acc_acl = create_racl();
654 rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode);
656 /* Avoid sending values that can be inferred from other data. */
657 rsync_acl_strip_perms(sxp);
659 send_rsync_acl(f, sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list);
661 if (S_ISDIR(sxp->st.st_mode)) {
663 sxp->def_acl = create_racl();
665 send_rsync_acl(f, sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list);
669 /* === Receive functions === */
671 static uint32 recv_acl_access(int f, uchar *name_follows_ptr)
673 uint32 access = read_varint(f);
675 if (name_follows_ptr) {
676 int flags = access & 3;
678 if (am_root >= 0 && access & ~SMB_ACL_VALID_NAME_BITS)
680 if (flags & XFLAG_NAME_FOLLOWS)
681 *name_follows_ptr = 1;
683 *name_follows_ptr = 0;
684 if (flags & XFLAG_NAME_IS_USER)
685 access |= NAME_IS_USER;
686 } else if (am_root >= 0 && access & ~SMB_ACL_VALID_OBJ_BITS) {
688 rprintf(FERROR_XFER, "recv_acl_access: value out of range: %x\n",
690 exit_cleanup(RERR_STREAMIO);
696 static uchar recv_ida_entries(int f, ida_entries *ent)
698 uchar computed_mask_bits = 0;
699 int i, count = read_varint(f);
702 if (!(ent->idas = new_array(id_access, count)))
703 out_of_memory("recv_ida_entries");
709 for (i = 0; i < count; i++) {
711 id_t id = read_varint(f);
712 uint32 access = recv_acl_access(f, &has_name);
715 if (access & NAME_IS_USER)
716 id = recv_user_name(f, id);
718 id = recv_group_name(f, id, NULL);
719 } else if (access & NAME_IS_USER) {
720 if (inc_recurse && am_root && !numeric_ids)
723 if (inc_recurse && (!am_root || !numeric_ids))
724 id = match_gid(id, NULL);
727 ent->idas[i].id = id;
728 ent->idas[i].access = access;
729 computed_mask_bits |= access;
732 return computed_mask_bits & ~NO_ENTRY;
735 static int recv_rsync_acl(int f, item_list *racl_list, SMB_ACL_TYPE_T type, mode_t mode)
737 uchar computed_mask_bits = 0;
740 int ndx = read_varint(f);
742 if (ndx < 0 || (size_t)ndx > racl_list->count) {
743 rprintf(FERROR_XFER, "recv_acl_index: %s ACL index %d > %d\n",
744 str_acl_type(type), ndx, (int)racl_list->count);
745 exit_cleanup(RERR_STREAMIO);
751 ndx = racl_list->count;
752 duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
753 duo_item->racl = empty_rsync_acl;
755 flags = read_byte(f);
757 if (flags & XMIT_USER_OBJ)
758 duo_item->racl.user_obj = recv_acl_access(f, NULL);
759 if (flags & XMIT_GROUP_OBJ)
760 duo_item->racl.group_obj = recv_acl_access(f, NULL);
761 if (flags & XMIT_MASK_OBJ)
762 duo_item->racl.mask_obj = recv_acl_access(f, NULL);
763 if (flags & XMIT_OTHER_OBJ)
764 duo_item->racl.other_obj = recv_acl_access(f, NULL);
765 if (flags & XMIT_NAME_LIST)
766 computed_mask_bits |= recv_ida_entries(f, &duo_item->racl.names);
769 /* If we received a superfluous mask, throw it away. */
770 duo_item->racl.mask_obj = NO_ENTRY;
772 if (duo_item->racl.names.count && duo_item->racl.mask_obj == NO_ENTRY) {
773 /* Mask must be non-empty with lists. */
774 if (type == SMB_ACL_TYPE_ACCESS)
775 computed_mask_bits = (mode >> 3) & 7;
777 computed_mask_bits |= duo_item->racl.group_obj & ~NO_ENTRY;
778 duo_item->racl.mask_obj = computed_mask_bits;
782 duo_item->sacl = NULL;
787 /* Receive the ACL info the sender has included for this file-list entry. */
788 void receive_acl(int f, struct file_struct *file)
790 F_ACL(file) = recv_rsync_acl(f, &access_acl_list, SMB_ACL_TYPE_ACCESS, file->mode);
792 if (S_ISDIR(file->mode))
793 F_DIR_DEFACL(file) = recv_rsync_acl(f, &default_acl_list, SMB_ACL_TYPE_DEFAULT, 0);
796 static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list)
802 else if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) == -1) {
804 ndx = racl_list->count;
805 new_duo = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000);
806 new_duo->racl = *racl;
807 new_duo->sacl = NULL;
808 *racl = empty_rsync_acl;
814 /* Turn the ACL data in stat_x into cached ACL data, setting the index
815 * values in the file struct. */
816 void cache_tmp_acl(struct file_struct *file, stat_x *sxp)
818 if (prior_access_count == (size_t)-1)
819 prior_access_count = access_acl_list.count;
821 F_ACL(file) = cache_rsync_acl(sxp->acc_acl,
822 SMB_ACL_TYPE_ACCESS, &access_acl_list);
824 if (S_ISDIR(sxp->st.st_mode)) {
825 if (prior_default_count == (size_t)-1)
826 prior_default_count = default_acl_list.count;
827 F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl,
828 SMB_ACL_TYPE_DEFAULT, &default_acl_list);
832 static void uncache_duo_acls(item_list *duo_list, size_t start)
834 acl_duo *duo_item = duo_list->items;
835 acl_duo *duo_start = duo_item + start;
837 duo_item += duo_list->count;
838 duo_list->count = start;
840 while (duo_item-- > duo_start) {
841 rsync_acl_free(&duo_item->racl);
843 sys_acl_free_acl(duo_item->sacl);
847 void uncache_tmp_acls(void)
849 if (prior_access_count != (size_t)-1) {
850 uncache_duo_acls(&access_acl_list, prior_access_count);
851 prior_access_count = (size_t)-1;
854 if (prior_default_count != (size_t)-1) {
855 uncache_duo_acls(&default_acl_list, prior_default_count);
856 prior_default_count = (size_t)-1;
860 #ifndef HAVE_OSX_ACLS
861 static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode, mode_t mode)
863 SMB_ACL_ENTRY_T entry;
868 /* If the sticky bit is going on, it's not safe to allow all
869 * the new ACL to go into effect before it gets set. */
870 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
874 if (mode & S_ISVTX && !(old_mode & S_ISVTX))
877 /* If setuid or setgid is going off, it's not safe to allow all
878 * the new ACL to go into effect before they get cleared. */
879 if ((old_mode & S_ISUID && !(mode & S_ISUID))
880 || (old_mode & S_ISGID && !(mode & S_ISGID)))
885 errfun = "sys_acl_get_entry";
886 for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry);
888 rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) {
889 SMB_ACL_TAG_T tag_type;
890 if ((rc = sys_acl_get_tag_type(entry, &tag_type)) != 0) {
891 errfun = "sys_acl_get_tag_type";
895 case SMB_ACL_USER_OBJ:
896 COE2( store_access_in_entry,((mode >> 6) & 7, entry) );
898 case SMB_ACL_GROUP_OBJ:
899 /* group is only empty when identical to group perms. */
900 if (racl->group_obj != NO_ENTRY)
902 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
905 #ifndef HAVE_SOLARIS_ACLS
906 #ifndef ACLS_NEED_MASK
907 /* mask is only empty when we don't need it. */
908 if (racl->mask_obj == NO_ENTRY)
911 COE2( store_access_in_entry,((mode >> 3) & 7, entry) );
915 COE2( store_access_in_entry,(mode & 7, entry) );
922 rsyserr(FERROR_XFER, errno, "change_sacl_perms: %s()",
928 #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS
929 /* Ensure that chmod() will be called to restore any lost setid bits. */
930 if (old_mode & (S_ISUID | S_ISGID | S_ISVTX)
931 && BITS_EQUAL(old_mode, mode, CHMOD_BITS))
932 old_mode &= ~(S_ISUID | S_ISGID | S_ISVTX);
935 /* Return the mode of the file on disk, as we will set them. */
936 return (old_mode & ~ACCESSPERMS) | (mode & ACCESSPERMS);
940 static int set_rsync_acl(const char *fname, acl_duo *duo_item,
941 SMB_ACL_TYPE_T type, stat_x *sxp, mode_t mode)
943 if (type == SMB_ACL_TYPE_DEFAULT
944 && duo_item->racl.user_obj == NO_ENTRY) {
946 #ifdef SUPPORT_XATTRS
947 /* --fake-super support: delete default ACL from xattrs. */
949 rc = del_def_xattr_acl(fname);
952 rc = sys_acl_delete_def_file(fname);
954 rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_delete_def_file(%s)",
958 #ifdef SUPPORT_XATTRS
959 } else if (am_root < 0) {
960 /* --fake-super support: store ACLs in an xattr. */
961 int cnt = duo_item->racl.names.count;
962 size_t len = 4*4 + cnt * (4+4);
963 char *buf = new_array(char, len);
966 SIVAL(buf, 0, duo_item->racl.user_obj);
967 SIVAL(buf, 4, duo_item->racl.group_obj);
968 SIVAL(buf, 8, duo_item->racl.mask_obj);
969 SIVAL(buf, 12, duo_item->racl.other_obj);
972 char *bp = buf + 4*4;
973 id_access *ida = duo_item->racl.names.idas;
974 for ( ; cnt--; ida++, bp += 4+4) {
975 SIVAL(bp, 0, ida->id);
976 SIVAL(bp, 4, ida->access);
979 rc = set_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, buf, len);
984 mode_t cur_mode = sxp->st.st_mode;
986 && !pack_smb_acl(&duo_item->sacl, &duo_item->racl))
989 mode = 0; /* eliminate compiler warning */
991 if (type == SMB_ACL_TYPE_ACCESS) {
992 cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl,
994 if (cur_mode == (mode_t)-1)
998 if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) {
999 rsyserr(FERROR_XFER, errno, "set_acl: sys_acl_set_file(%s, %s)",
1000 fname, str_acl_type(type));
1003 if (type == SMB_ACL_TYPE_ACCESS)
1004 sxp->st.st_mode = cur_mode;
1010 /* Given a fname, this sets extended access ACL entries, the default ACL (for a
1011 * dir), and the regular mode bits on the file. Call this with fname set to
1012 * NULL to just check if the ACL is different.
1014 * If the ACL operation has a side-effect of changing the file's mode, the
1015 * sxp->st.st_mode value will be changed to match.
1017 * Returns 0 for an unchanged ACL, 1 for changed, -1 for failed. */
1018 int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp, mode_t new_mode)
1024 if (!dry_run && (read_only || list_only)) {
1030 if (ndx >= 0 && (size_t)ndx < access_acl_list.count) {
1031 acl_duo *duo_item = access_acl_list.items;
1034 && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, new_mode);
1037 if (!dry_run && fname
1038 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS,
1044 if (!S_ISDIR(new_mode))
1047 ndx = F_DIR_DEFACL(file);
1048 if (ndx >= 0 && (size_t)ndx < default_acl_list.count) {
1049 acl_duo *duo_item = default_acl_list.items;
1051 eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl);
1054 if (!dry_run && fname
1055 && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT,
1064 /* Non-incremental recursion needs to convert all the received IDs.
1065 * This is done in a single pass after receiving the whole file-list. */
1066 static void match_racl_ids(const item_list *racl_list)
1068 int list_cnt, name_cnt;
1069 acl_duo *duo_item = racl_list->items;
1070 for (list_cnt = racl_list->count; list_cnt--; duo_item++) {
1071 ida_entries *idal = &duo_item->racl.names;
1072 id_access *ida = idal->idas;
1073 for (name_cnt = idal->count; name_cnt--; ida++) {
1074 if (ida->access & NAME_IS_USER)
1075 ida->id = match_uid(ida->id);
1077 ida->id = match_gid(ida->id, NULL);
1082 void match_acl_ids(void)
1084 match_racl_ids(&access_acl_list);
1085 match_racl_ids(&default_acl_list);
1088 /* This is used by dest_mode(). */
1089 int default_perms_for_dir(const char *dir)
1098 perms = ACCESSPERMS & ~orig_umask;
1099 /* Read the directory's default ACL. If it has none, this will successfully return an empty ACL. */
1100 sacl = sys_acl_get_file(dir, SMB_ACL_TYPE_DEFAULT);
1102 /* Couldn't get an ACL. Darn. */
1105 /* If SMB_ACL_TYPE_DEFAULT isn't valid, then the ACLs must be non-POSIX. */
1111 /* No ACLs are available. */
1115 /* We're doing a dry run, so the containing directory
1116 * wasn't actually created. Don't worry about it. */
1119 /* Otherwise fall through. */
1122 "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n",
1123 dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno));
1129 racl = empty_rsync_acl;
1130 ok = unpack_smb_acl(sacl, &racl);
1131 sys_acl_free_acl(sacl);
1133 rprintf(FWARNING, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n");
1137 /* Apply the permission-bit entries of the default ACL, if any. */
1138 if (racl.user_obj != NO_ENTRY) {
1139 perms = rsync_acl_get_perms(&racl);
1140 if (DEBUG_GTE(ACL, 1))
1141 rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir);
1144 rsync_acl_free(&racl);
1148 #endif /* SUPPORT_ACLS */