| 1 | /* |
| 2 | * Handle passing Access Control Lists between systems. |
| 3 | * |
| 4 | * Copyright (C) 1996 Andrew Tridgell |
| 5 | * Copyright (C) 1996 Paul Mackerras |
| 6 | * Copyright (C) 2006 Wayne Davison |
| 7 | * |
| 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. |
| 12 | * |
| 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. |
| 17 | * |
| 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. |
| 20 | */ |
| 21 | |
| 22 | #include "rsync.h" |
| 23 | #include "lib/sysacls.h" |
| 24 | |
| 25 | #ifdef SUPPORT_ACLS |
| 26 | |
| 27 | extern int dry_run; |
| 28 | extern int am_root; |
| 29 | extern int read_only; |
| 30 | extern int list_only; |
| 31 | extern int orig_umask; |
| 32 | extern int numeric_ids; |
| 33 | extern int inc_recurse; |
| 34 | |
| 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) |
| 41 | |
| 42 | #define NO_ENTRY ((uchar)0x80) /* Default value of a NON-name-list entry. */ |
| 43 | |
| 44 | #define NAME_IS_USER (1u<<31) /* Bit used only on a name-list entry. */ |
| 45 | |
| 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 |
| 52 | |
| 53 | /* === ACL structures === */ |
| 54 | |
| 55 | typedef struct { |
| 56 | id_t id; |
| 57 | uint32 access; |
| 58 | } id_access; |
| 59 | |
| 60 | typedef struct { |
| 61 | id_access *idas; |
| 62 | int count; |
| 63 | } ida_entries; |
| 64 | |
| 65 | typedef struct { |
| 66 | char *name; |
| 67 | uchar len; |
| 68 | } idname; |
| 69 | |
| 70 | typedef struct rsync_acl { |
| 71 | ida_entries names; |
| 72 | /* These will be NO_ENTRY if there's no such entry. */ |
| 73 | uchar user_obj; |
| 74 | uchar group_obj; |
| 75 | uchar mask_obj; |
| 76 | uchar other_obj; |
| 77 | } rsync_acl; |
| 78 | |
| 79 | typedef struct { |
| 80 | rsync_acl racl; |
| 81 | SMB_ACL_T sacl; |
| 82 | } acl_duo; |
| 83 | |
| 84 | static const rsync_acl empty_rsync_acl = { |
| 85 | {NULL, 0}, NO_ENTRY, NO_ENTRY, NO_ENTRY, NO_ENTRY |
| 86 | }; |
| 87 | |
| 88 | static item_list access_acl_list = EMPTY_ITEM_LIST; |
| 89 | static item_list default_acl_list = EMPTY_ITEM_LIST; |
| 90 | |
| 91 | /* === Calculations on ACL types === */ |
| 92 | |
| 93 | static const char *str_acl_type(SMB_ACL_TYPE_T type) |
| 94 | { |
| 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"; |
| 98 | } |
| 99 | |
| 100 | static int calc_sacl_entries(const rsync_acl *racl) |
| 101 | { |
| 102 | /* A System ACL always gets user/group/other permission entries. */ |
| 103 | return racl->names.count |
| 104 | #ifdef ACLS_NEED_MASK |
| 105 | + 4; |
| 106 | #else |
| 107 | + (racl->mask_obj != NO_ENTRY) + 3; |
| 108 | #endif |
| 109 | } |
| 110 | |
| 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) |
| 114 | { |
| 115 | return (racl->user_obj << 6) |
| 116 | + ((racl->mask_obj != NO_ENTRY ? racl->mask_obj : racl->group_obj) << 3) |
| 117 | + racl->other_obj; |
| 118 | } |
| 119 | |
| 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) |
| 123 | { |
| 124 | racl->user_obj = NO_ENTRY; |
| 125 | if (racl->mask_obj == NO_ENTRY) |
| 126 | racl->group_obj = NO_ENTRY; |
| 127 | else { |
| 128 | if (racl->group_obj == racl->mask_obj) |
| 129 | racl->group_obj = NO_ENTRY; |
| 130 | racl->mask_obj = NO_ENTRY; |
| 131 | } |
| 132 | racl->other_obj = NO_ENTRY; |
| 133 | } |
| 134 | |
| 135 | /* Given an empty rsync_acl, fake up the permission bits. */ |
| 136 | static void rsync_acl_fake_perms(rsync_acl *racl, mode_t mode) |
| 137 | { |
| 138 | racl->user_obj = (mode >> 6) & 7; |
| 139 | racl->group_obj = (mode >> 3) & 7; |
| 140 | racl->other_obj = mode & 7; |
| 141 | } |
| 142 | |
| 143 | /* === Rsync ACL functions === */ |
| 144 | |
| 145 | static rsync_acl *create_racl(void) |
| 146 | { |
| 147 | rsync_acl *racl = new(rsync_acl); |
| 148 | |
| 149 | if (!racl) |
| 150 | out_of_memory("create_racl"); |
| 151 | *racl = empty_rsync_acl; |
| 152 | |
| 153 | return racl; |
| 154 | } |
| 155 | |
| 156 | static BOOL ida_entries_equal(const ida_entries *ial1, const ida_entries *ial2) |
| 157 | { |
| 158 | id_access *ida1, *ida2; |
| 159 | int count = ial1->count; |
| 160 | if (count != ial2->count) |
| 161 | return False; |
| 162 | ida1 = ial1->idas; |
| 163 | ida2 = ial2->idas; |
| 164 | for (; count--; ida1++, ida2++) { |
| 165 | if (ida1->access != ida2->access || ida1->id != ida2->id) |
| 166 | return False; |
| 167 | } |
| 168 | return True; |
| 169 | } |
| 170 | |
| 171 | static BOOL rsync_acl_equal(const rsync_acl *racl1, const rsync_acl *racl2) |
| 172 | { |
| 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); |
| 178 | } |
| 179 | |
| 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) |
| 187 | { |
| 188 | if ((racl1->mask_obj ^ racl2->mask_obj) & NO_ENTRY) |
| 189 | return False; /* One has a mask and the other doesn't */ |
| 190 | |
| 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 |
| 196 | * from the mode. */ |
| 197 | if (racl2->group_obj == NO_ENTRY) { |
| 198 | if (racl1->group_obj != ((m >> 3) & 7)) |
| 199 | return False; |
| 200 | } else if (racl1->group_obj != racl2->group_obj) |
| 201 | return False; |
| 202 | } |
| 203 | return ida_entries_equal(&racl1->names, &racl2->names); |
| 204 | } |
| 205 | |
| 206 | static void rsync_acl_free(rsync_acl *racl) |
| 207 | { |
| 208 | if (racl->names.idas) |
| 209 | free(racl->names.idas); |
| 210 | *racl = empty_rsync_acl; |
| 211 | } |
| 212 | |
| 213 | void free_acl(stat_x *sxp) |
| 214 | { |
| 215 | if (sxp->acc_acl) { |
| 216 | rsync_acl_free(sxp->acc_acl); |
| 217 | free(sxp->acc_acl); |
| 218 | sxp->acc_acl = NULL; |
| 219 | } |
| 220 | if (sxp->def_acl) { |
| 221 | rsync_acl_free(sxp->def_acl); |
| 222 | free(sxp->def_acl); |
| 223 | sxp->def_acl = NULL; |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | #ifdef SMB_ACL_NEED_SORT |
| 228 | static int id_access_sorter(const void *r1, const void *r2) |
| 229 | { |
| 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; |
| 236 | } |
| 237 | #endif |
| 238 | |
| 239 | /* === System ACLs === */ |
| 240 | |
| 241 | /* Unpack system ACL -> rsync ACL verbatim. Return whether we succeeded. */ |
| 242 | static BOOL unpack_smb_acl(SMB_ACL_T sacl, rsync_acl *racl) |
| 243 | { |
| 244 | static item_list temp_ida_list = EMPTY_ITEM_LIST; |
| 245 | SMB_ACL_ENTRY_T entry; |
| 246 | const char *errfun; |
| 247 | int rc; |
| 248 | |
| 249 | errfun = "sys_acl_get_entry"; |
| 250 | for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry); |
| 251 | rc == 1; |
| 252 | rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) { |
| 253 | SMB_ACL_TAG_T tag_type; |
| 254 | uint32 access; |
| 255 | id_t g_u_id; |
| 256 | id_access *ida; |
| 257 | if ((rc = sys_acl_get_info(entry, &tag_type, &access, &g_u_id)) != 0) { |
| 258 | errfun = "sys_acl_get_info"; |
| 259 | break; |
| 260 | } |
| 261 | /* continue == done with entry; break == store in temporary ida list */ |
| 262 | switch (tag_type) { |
| 263 | #ifndef HAVE_OSX_ACLS |
| 264 | case SMB_ACL_USER_OBJ: |
| 265 | if (racl->user_obj == NO_ENTRY) |
| 266 | racl->user_obj = access; |
| 267 | else |
| 268 | rprintf(FINFO, "unpack_smb_acl: warning: duplicate USER_OBJ entry ignored\n"); |
| 269 | continue; |
| 270 | case SMB_ACL_GROUP_OBJ: |
| 271 | if (racl->group_obj == NO_ENTRY) |
| 272 | racl->group_obj = access; |
| 273 | else |
| 274 | rprintf(FINFO, "unpack_smb_acl: warning: duplicate GROUP_OBJ entry ignored\n"); |
| 275 | continue; |
| 276 | case SMB_ACL_MASK: |
| 277 | if (racl->mask_obj == NO_ENTRY) |
| 278 | racl->mask_obj = access; |
| 279 | else |
| 280 | rprintf(FINFO, "unpack_smb_acl: warning: duplicate MASK entry ignored\n"); |
| 281 | continue; |
| 282 | case SMB_ACL_OTHER: |
| 283 | if (racl->other_obj == NO_ENTRY) |
| 284 | racl->other_obj = access; |
| 285 | else |
| 286 | rprintf(FINFO, "unpack_smb_acl: warning: duplicate OTHER entry ignored\n"); |
| 287 | continue; |
| 288 | #endif |
| 289 | case SMB_ACL_USER: |
| 290 | access |= NAME_IS_USER; |
| 291 | break; |
| 292 | case SMB_ACL_GROUP: |
| 293 | break; |
| 294 | default: |
| 295 | rprintf(FINFO, "unpack_smb_acl: warning: entry with unrecognized tag type ignored\n"); |
| 296 | continue; |
| 297 | } |
| 298 | ida = EXPAND_ITEM_LIST(&temp_ida_list, id_access, -10); |
| 299 | ida->id = g_u_id; |
| 300 | ida->access = access; |
| 301 | } |
| 302 | if (rc) { |
| 303 | rsyserr(FERROR, errno, "unpack_smb_acl: %s()", errfun); |
| 304 | rsync_acl_free(racl); |
| 305 | return False; |
| 306 | } |
| 307 | |
| 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); |
| 315 | } |
| 316 | #endif |
| 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)); |
| 321 | } else |
| 322 | racl->names.idas = NULL; |
| 323 | |
| 324 | racl->names.count = temp_ida_list.count; |
| 325 | |
| 326 | /* Truncate the temporary list now that its idas have been saved. */ |
| 327 | temp_ida_list.count = 0; |
| 328 | |
| 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; |
| 335 | } |
| 336 | #endif |
| 337 | |
| 338 | return True; |
| 339 | } |
| 340 | |
| 341 | /* Synactic sugar for system calls */ |
| 342 | |
| 343 | #define CALL_OR_ERROR(func,args,str) \ |
| 344 | do { \ |
| 345 | if (func args) { \ |
| 346 | errfun = str; \ |
| 347 | goto error_exit; \ |
| 348 | } \ |
| 349 | } while (0) |
| 350 | |
| 351 | #define COE(func,args) CALL_OR_ERROR(func,args,#func) |
| 352 | #define COE2(func,args) CALL_OR_ERROR(func,args,NULL) |
| 353 | |
| 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) |
| 357 | { |
| 358 | if (sys_acl_set_access_bits(entry, access)) { |
| 359 | rsyserr(FERROR, errno, "store_access_in_entry sys_acl_set_access_bits()"); |
| 360 | return -1; |
| 361 | } |
| 362 | return 0; |
| 363 | } |
| 364 | #endif |
| 365 | |
| 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) |
| 368 | { |
| 369 | #ifdef ACLS_NEED_MASK |
| 370 | uchar mask_bits; |
| 371 | #endif |
| 372 | size_t count; |
| 373 | id_access *ida; |
| 374 | const char *errfun = NULL; |
| 375 | SMB_ACL_ENTRY_T entry; |
| 376 | |
| 377 | if (!(*smb_acl = sys_acl_init(calc_sacl_entries(racl)))) { |
| 378 | rsyserr(FERROR, errno, "pack_smb_acl: sys_acl_init()"); |
| 379 | return False; |
| 380 | } |
| 381 | |
| 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) ); |
| 385 | #endif |
| 386 | |
| 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)) |
| 390 | break; |
| 391 | #endif |
| 392 | COE( sys_acl_create_entry,(smb_acl, &entry) ); |
| 393 | COE( sys_acl_set_info, |
| 394 | (entry, |
| 395 | ida->access & NAME_IS_USER ? SMB_ACL_USER : SMB_ACL_GROUP, |
| 396 | ida->access & ~NAME_IS_USER, ida->id) ); |
| 397 | } |
| 398 | |
| 399 | #ifndef HAVE_OSX_ACLS |
| 400 | COE( sys_acl_create_entry,(smb_acl, &entry) ); |
| 401 | COE( sys_acl_set_info,(entry, SMB_ACL_GROUP_OBJ, racl->group_obj & ~NO_ENTRY, 0) ); |
| 402 | |
| 403 | #ifdef SMB_ACL_NEED_SORT |
| 404 | for ( ; count; ida++, count--) { |
| 405 | COE( sys_acl_create_entry,(smb_acl, &entry) ); |
| 406 | COE( sys_acl_set_info,(entry, SMB_ACL_GROUP, ida->access, ida->id) ); |
| 407 | } |
| 408 | #endif |
| 409 | |
| 410 | #ifdef ACLS_NEED_MASK |
| 411 | mask_bits = racl->mask_obj == NO_ENTRY ? racl->group_obj & ~NO_ENTRY : racl->mask_obj; |
| 412 | COE( sys_acl_create_entry,(smb_acl, &entry) ); |
| 413 | COE( sys_acl_set_info,(entry, SMB_ACL_MASK, mask_bits, NULL) ); |
| 414 | #else |
| 415 | if (racl->mask_obj != NO_ENTRY) { |
| 416 | COE( sys_acl_create_entry,(smb_acl, &entry) ); |
| 417 | COE( sys_acl_set_info,(entry, SMB_ACL_MASK, racl->mask_obj, 0) ); |
| 418 | } |
| 419 | #endif |
| 420 | |
| 421 | COE( sys_acl_create_entry,(smb_acl, &entry) ); |
| 422 | COE( sys_acl_set_info,(entry, SMB_ACL_OTHER, racl->other_obj & ~NO_ENTRY, 0) ); |
| 423 | #endif |
| 424 | |
| 425 | #ifdef DEBUG |
| 426 | if (sys_acl_valid(*smb_acl) < 0) |
| 427 | rprintf(FERROR, "pack_smb_acl: warning: system says the ACL I packed is invalid\n"); |
| 428 | #endif |
| 429 | |
| 430 | return True; |
| 431 | |
| 432 | error_exit: |
| 433 | if (errfun) { |
| 434 | rsyserr(FERROR, errno, "pack_smb_acl %s()", errfun); |
| 435 | } |
| 436 | sys_acl_free_acl(*smb_acl); |
| 437 | return False; |
| 438 | } |
| 439 | |
| 440 | static int find_matching_rsync_acl(const rsync_acl *racl, SMB_ACL_TYPE_T type, |
| 441 | const item_list *racl_list) |
| 442 | { |
| 443 | static int access_match = -1, default_match = -1; |
| 444 | int *match = type == SMB_ACL_TYPE_ACCESS ? &access_match : &default_match; |
| 445 | size_t count = racl_list->count; |
| 446 | |
| 447 | /* If this is the first time through or we didn't match the last |
| 448 | * time, then start at the end of the list, which should be the |
| 449 | * best place to start hunting. */ |
| 450 | if (*match == -1) |
| 451 | *match = racl_list->count - 1; |
| 452 | while (count--) { |
| 453 | rsync_acl *base = racl_list->items; |
| 454 | if (rsync_acl_equal(base + *match, racl)) |
| 455 | return *match; |
| 456 | if (!(*match)--) |
| 457 | *match = racl_list->count - 1; |
| 458 | } |
| 459 | |
| 460 | *match = -1; |
| 461 | return *match; |
| 462 | } |
| 463 | |
| 464 | static int get_rsync_acl(const char *fname, rsync_acl *racl, |
| 465 | SMB_ACL_TYPE_T type, mode_t mode) |
| 466 | { |
| 467 | SMB_ACL_T sacl; |
| 468 | |
| 469 | #ifdef SUPPORT_XATTRS |
| 470 | /* --fake-super support: load ACLs from an xattr. */ |
| 471 | if (am_root < 0) { |
| 472 | char *buf; |
| 473 | size_t len; |
| 474 | int cnt; |
| 475 | |
| 476 | if ((buf = get_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, &len)) == NULL) |
| 477 | return 0; |
| 478 | cnt = (len - 4*4) / (4+4); |
| 479 | if (len < 4*4 || len != (size_t)cnt*(4+4) + 4*4) |
| 480 | return -1; |
| 481 | |
| 482 | racl->user_obj = IVAL(buf, 0); |
| 483 | racl->group_obj = IVAL(buf, 4); |
| 484 | racl->mask_obj = IVAL(buf, 8); |
| 485 | racl->other_obj = IVAL(buf, 12); |
| 486 | |
| 487 | if (cnt) { |
| 488 | char *bp = buf + 4*4; |
| 489 | id_access *ida; |
| 490 | if (!(ida = racl->names.idas = new_array(id_access, cnt))) |
| 491 | out_of_memory("get_rsync_acl"); |
| 492 | racl->names.count = cnt; |
| 493 | for ( ; cnt--; ida++, bp += 4+4) { |
| 494 | ida->id = IVAL(bp, 0); |
| 495 | ida->access = IVAL(bp, 4); |
| 496 | } |
| 497 | } |
| 498 | free(buf); |
| 499 | return 0; |
| 500 | } |
| 501 | #endif |
| 502 | |
| 503 | if ((sacl = sys_acl_get_file(fname, type)) != 0) { |
| 504 | BOOL ok = unpack_smb_acl(sacl, racl); |
| 505 | |
| 506 | sys_acl_free_acl(sacl); |
| 507 | if (!ok) { |
| 508 | return -1; |
| 509 | } |
| 510 | } else if (no_acl_syscall_error(errno)) { |
| 511 | /* ACLs are not supported, so pretend we have a basic ACL. */ |
| 512 | if (type == SMB_ACL_TYPE_ACCESS) |
| 513 | rsync_acl_fake_perms(racl, mode); |
| 514 | } else { |
| 515 | rsyserr(FERROR, errno, "get_acl: sys_acl_get_file(%s, %s)", |
| 516 | fname, str_acl_type(type)); |
| 517 | return -1; |
| 518 | } |
| 519 | |
| 520 | return 0; |
| 521 | } |
| 522 | |
| 523 | /* Return the Access Control List for the given filename. */ |
| 524 | int get_acl(const char *fname, stat_x *sxp) |
| 525 | { |
| 526 | sxp->acc_acl = create_racl(); |
| 527 | if (get_rsync_acl(fname, sxp->acc_acl, SMB_ACL_TYPE_ACCESS, |
| 528 | sxp->st.st_mode) < 0) { |
| 529 | free_acl(sxp); |
| 530 | return -1; |
| 531 | } |
| 532 | |
| 533 | if (S_ISDIR(sxp->st.st_mode)) { |
| 534 | sxp->def_acl = create_racl(); |
| 535 | if (get_rsync_acl(fname, sxp->def_acl, SMB_ACL_TYPE_DEFAULT, |
| 536 | sxp->st.st_mode) < 0) { |
| 537 | free_acl(sxp); |
| 538 | return -1; |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | return 0; |
| 543 | } |
| 544 | |
| 545 | /* === Send functions === */ |
| 546 | |
| 547 | /* Send the ida list over the file descriptor. */ |
| 548 | static void send_ida_entries(const ida_entries *idal, int f) |
| 549 | { |
| 550 | id_access *ida; |
| 551 | size_t count = idal->count; |
| 552 | |
| 553 | write_varint(f, idal->count); |
| 554 | |
| 555 | for (ida = idal->idas; count--; ida++) { |
| 556 | uint32 xbits = ida->access << 2; |
| 557 | char *name; |
| 558 | if (ida->access & NAME_IS_USER) { |
| 559 | xbits |= XFLAG_NAME_IS_USER; |
| 560 | name = add_uid(ida->id); |
| 561 | } else |
| 562 | name = add_gid(ida->id); |
| 563 | write_varint(f, ida->id); |
| 564 | if (inc_recurse && name) { |
| 565 | int len = strlen(name); |
| 566 | write_varint(f, xbits | XFLAG_NAME_FOLLOWS); |
| 567 | write_byte(f, len); |
| 568 | write_buf(f, name, len); |
| 569 | } else |
| 570 | write_varint(f, xbits); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | static void send_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, |
| 575 | item_list *racl_list, int f) |
| 576 | { |
| 577 | int ndx = find_matching_rsync_acl(racl, type, racl_list); |
| 578 | |
| 579 | /* Send 0 (-1 + 1) to indicate that literal ACL data follows. */ |
| 580 | write_varint(f, ndx + 1); |
| 581 | |
| 582 | if (ndx < 0) { |
| 583 | rsync_acl *new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000); |
| 584 | uchar flags = 0; |
| 585 | |
| 586 | if (racl->user_obj != NO_ENTRY) |
| 587 | flags |= XMIT_USER_OBJ; |
| 588 | if (racl->group_obj != NO_ENTRY) |
| 589 | flags |= XMIT_GROUP_OBJ; |
| 590 | if (racl->mask_obj != NO_ENTRY) |
| 591 | flags |= XMIT_MASK_OBJ; |
| 592 | if (racl->other_obj != NO_ENTRY) |
| 593 | flags |= XMIT_OTHER_OBJ; |
| 594 | if (racl->names.count) |
| 595 | flags |= XMIT_NAME_LIST; |
| 596 | |
| 597 | write_byte(f, flags); |
| 598 | |
| 599 | if (flags & XMIT_USER_OBJ) |
| 600 | write_varint(f, racl->user_obj); |
| 601 | if (flags & XMIT_GROUP_OBJ) |
| 602 | write_varint(f, racl->group_obj); |
| 603 | if (flags & XMIT_MASK_OBJ) |
| 604 | write_varint(f, racl->mask_obj); |
| 605 | if (flags & XMIT_OTHER_OBJ) |
| 606 | write_varint(f, racl->other_obj); |
| 607 | if (flags & XMIT_NAME_LIST) |
| 608 | send_ida_entries(&racl->names, f); |
| 609 | |
| 610 | /* Give the allocated data to the new list object. */ |
| 611 | *new_racl = *racl; |
| 612 | *racl = empty_rsync_acl; |
| 613 | } |
| 614 | } |
| 615 | |
| 616 | /* Send the ACL from the stat_x structure down the indicated file descriptor. |
| 617 | * This also frees the ACL data. */ |
| 618 | void send_acl(stat_x *sxp, int f) |
| 619 | { |
| 620 | if (!sxp->acc_acl) { |
| 621 | sxp->acc_acl = create_racl(); |
| 622 | rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode); |
| 623 | } |
| 624 | /* Avoid sending values that can be inferred from other data. */ |
| 625 | rsync_acl_strip_perms(sxp->acc_acl); |
| 626 | |
| 627 | send_rsync_acl(sxp->acc_acl, SMB_ACL_TYPE_ACCESS, &access_acl_list, f); |
| 628 | |
| 629 | if (S_ISDIR(sxp->st.st_mode)) { |
| 630 | if (!sxp->def_acl) |
| 631 | sxp->def_acl = create_racl(); |
| 632 | |
| 633 | send_rsync_acl(sxp->def_acl, SMB_ACL_TYPE_DEFAULT, &default_acl_list, f); |
| 634 | } |
| 635 | } |
| 636 | |
| 637 | /* === Receive functions === */ |
| 638 | |
| 639 | static uint32 recv_acl_access(uchar *name_follows_ptr, int f) |
| 640 | { |
| 641 | uint32 access = read_varint(f); |
| 642 | |
| 643 | if (name_follows_ptr) { |
| 644 | int flags = access & 3; |
| 645 | access >>= 2; |
| 646 | if (am_root >= 0 && access & ~SMB_ACL_VALID_NAME_BITS) |
| 647 | goto value_error; |
| 648 | if (flags & XFLAG_NAME_FOLLOWS) |
| 649 | *name_follows_ptr = 1; |
| 650 | else |
| 651 | *name_follows_ptr = 0; |
| 652 | if (flags & XFLAG_NAME_IS_USER) |
| 653 | access |= NAME_IS_USER; |
| 654 | } else if (am_root >= 0 && access & ~SMB_ACL_VALID_OBJ_BITS) { |
| 655 | value_error: |
| 656 | rprintf(FERROR, "recv_acl_access: value out of range: %x\n", |
| 657 | access); |
| 658 | exit_cleanup(RERR_STREAMIO); |
| 659 | } |
| 660 | |
| 661 | return access; |
| 662 | } |
| 663 | |
| 664 | static uchar recv_ida_entries(ida_entries *ent, int f) |
| 665 | { |
| 666 | uchar computed_mask_bits = 0; |
| 667 | int i, count = read_varint(f); |
| 668 | |
| 669 | if (count) { |
| 670 | if (!(ent->idas = new_array(id_access, count))) |
| 671 | out_of_memory("recv_ida_entries"); |
| 672 | } else |
| 673 | ent->idas = NULL; |
| 674 | |
| 675 | ent->count = count; |
| 676 | |
| 677 | for (i = 0; i < count; i++) { |
| 678 | uchar has_name; |
| 679 | id_t id = read_varint(f); |
| 680 | uint32 access = recv_acl_access(&has_name, f); |
| 681 | |
| 682 | if (has_name) { |
| 683 | if (access & NAME_IS_USER) |
| 684 | id = recv_user_name(f, id); |
| 685 | else |
| 686 | id = recv_group_name(f, id, NULL); |
| 687 | } else if (access & NAME_IS_USER) { |
| 688 | if (inc_recurse && am_root && !numeric_ids) |
| 689 | id = match_uid(id); |
| 690 | } else { |
| 691 | if (inc_recurse && (!am_root || !numeric_ids)) |
| 692 | id = match_gid(id, NULL); |
| 693 | } |
| 694 | |
| 695 | ent->idas[i].id = id; |
| 696 | ent->idas[i].access = access; |
| 697 | computed_mask_bits |= access; |
| 698 | } |
| 699 | |
| 700 | return computed_mask_bits & ~NO_ENTRY; |
| 701 | } |
| 702 | |
| 703 | static int recv_rsync_acl(item_list *racl_list, SMB_ACL_TYPE_T type, int f) |
| 704 | { |
| 705 | uchar computed_mask_bits = 0; |
| 706 | acl_duo *duo_item; |
| 707 | uchar flags; |
| 708 | int ndx = read_varint(f); |
| 709 | |
| 710 | if (ndx < 0 || (size_t)ndx > racl_list->count) { |
| 711 | rprintf(FERROR, "recv_acl_index: %s ACL index %d > %d\n", |
| 712 | str_acl_type(type), ndx, (int)racl_list->count); |
| 713 | exit_cleanup(RERR_STREAMIO); |
| 714 | } |
| 715 | |
| 716 | if (ndx != 0) |
| 717 | return ndx - 1; |
| 718 | |
| 719 | ndx = racl_list->count; |
| 720 | duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000); |
| 721 | duo_item->racl = empty_rsync_acl; |
| 722 | |
| 723 | flags = read_byte(f); |
| 724 | |
| 725 | if (flags & XMIT_USER_OBJ) |
| 726 | duo_item->racl.user_obj = recv_acl_access(NULL, f); |
| 727 | if (flags & XMIT_GROUP_OBJ) |
| 728 | duo_item->racl.group_obj = recv_acl_access(NULL, f); |
| 729 | if (flags & XMIT_MASK_OBJ) |
| 730 | duo_item->racl.mask_obj = recv_acl_access(NULL, f); |
| 731 | if (flags & XMIT_OTHER_OBJ) |
| 732 | duo_item->racl.other_obj = recv_acl_access(NULL, f); |
| 733 | if (flags & XMIT_NAME_LIST) |
| 734 | computed_mask_bits |= recv_ida_entries(&duo_item->racl.names, f); |
| 735 | |
| 736 | #ifdef HAVE_OSX_ACLS |
| 737 | /* If we received a superfluous mask, throw it away. */ |
| 738 | duo_item->racl.mask_obj = NO_ENTRY; |
| 739 | #else |
| 740 | if (!duo_item->racl.names.count) { |
| 741 | /* If we received a superfluous mask, throw it away. */ |
| 742 | if (duo_item->racl.mask_obj != NO_ENTRY) { |
| 743 | /* Mask off the group perms with it first. */ |
| 744 | duo_item->racl.group_obj &= duo_item->racl.mask_obj | NO_ENTRY; |
| 745 | duo_item->racl.mask_obj = NO_ENTRY; |
| 746 | } |
| 747 | } else if (duo_item->racl.mask_obj == NO_ENTRY) /* Must be non-empty with lists. */ |
| 748 | duo_item->racl.mask_obj = (computed_mask_bits | duo_item->racl.group_obj) & ~NO_ENTRY; |
| 749 | #endif |
| 750 | |
| 751 | duo_item->sacl = NULL; |
| 752 | |
| 753 | return ndx; |
| 754 | } |
| 755 | |
| 756 | /* Receive the ACL info the sender has included for this file-list entry. */ |
| 757 | void receive_acl(struct file_struct *file, int f) |
| 758 | { |
| 759 | F_ACL(file) = recv_rsync_acl(&access_acl_list, SMB_ACL_TYPE_ACCESS, f); |
| 760 | |
| 761 | if (S_ISDIR(file->mode)) |
| 762 | F_DIR_DEFACL(file) = recv_rsync_acl(&default_acl_list, SMB_ACL_TYPE_DEFAULT, f); |
| 763 | } |
| 764 | |
| 765 | static int cache_rsync_acl(rsync_acl *racl, SMB_ACL_TYPE_T type, item_list *racl_list) |
| 766 | { |
| 767 | int ndx; |
| 768 | |
| 769 | if (!racl) |
| 770 | ndx = -1; |
| 771 | else if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) == -1) { |
| 772 | acl_duo *new_duo; |
| 773 | ndx = racl_list->count; |
| 774 | new_duo = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000); |
| 775 | new_duo->racl = *racl; |
| 776 | new_duo->sacl = NULL; |
| 777 | *racl = empty_rsync_acl; |
| 778 | } |
| 779 | |
| 780 | return ndx; |
| 781 | } |
| 782 | |
| 783 | /* Turn the ACL data in stat_x into cached ACL data, setting the index |
| 784 | * values in the file struct. */ |
| 785 | void cache_acl(struct file_struct *file, stat_x *sxp) |
| 786 | { |
| 787 | F_ACL(file) = cache_rsync_acl(sxp->acc_acl, |
| 788 | SMB_ACL_TYPE_ACCESS, &access_acl_list); |
| 789 | |
| 790 | if (S_ISDIR(sxp->st.st_mode)) { |
| 791 | F_DIR_DEFACL(file) = cache_rsync_acl(sxp->def_acl, |
| 792 | SMB_ACL_TYPE_DEFAULT, &default_acl_list); |
| 793 | } |
| 794 | } |
| 795 | |
| 796 | #ifndef HAVE_OSX_ACLS |
| 797 | static mode_t change_sacl_perms(SMB_ACL_T sacl, rsync_acl *racl, mode_t old_mode, mode_t mode) |
| 798 | { |
| 799 | SMB_ACL_ENTRY_T entry; |
| 800 | const char *errfun; |
| 801 | int rc; |
| 802 | |
| 803 | if (S_ISDIR(mode)) { |
| 804 | /* If the sticky bit is going on, it's not safe to allow all |
| 805 | * the new ACL to go into effect before it gets set. */ |
| 806 | #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS |
| 807 | if (mode & S_ISVTX) |
| 808 | mode &= ~0077; |
| 809 | #else |
| 810 | if (mode & S_ISVTX && !(old_mode & S_ISVTX)) |
| 811 | mode &= ~0077; |
| 812 | } else { |
| 813 | /* If setuid or setgid is going off, it's not safe to allow all |
| 814 | * the new ACL to go into effect before they get cleared. */ |
| 815 | if ((old_mode & S_ISUID && !(mode & S_ISUID)) |
| 816 | || (old_mode & S_ISGID && !(mode & S_ISGID))) |
| 817 | mode &= ~0077; |
| 818 | #endif |
| 819 | } |
| 820 | |
| 821 | errfun = "sys_acl_get_entry"; |
| 822 | for (rc = sys_acl_get_entry(sacl, SMB_ACL_FIRST_ENTRY, &entry); |
| 823 | rc == 1; |
| 824 | rc = sys_acl_get_entry(sacl, SMB_ACL_NEXT_ENTRY, &entry)) { |
| 825 | SMB_ACL_TAG_T tag_type; |
| 826 | if ((rc = sys_acl_get_tag_type(entry, &tag_type)) != 0) { |
| 827 | errfun = "sys_acl_get_tag_type"; |
| 828 | break; |
| 829 | } |
| 830 | switch (tag_type) { |
| 831 | case SMB_ACL_USER_OBJ: |
| 832 | COE2( store_access_in_entry,((mode >> 6) & 7, entry) ); |
| 833 | break; |
| 834 | case SMB_ACL_GROUP_OBJ: |
| 835 | /* group is only empty when identical to group perms. */ |
| 836 | if (racl->group_obj != NO_ENTRY) |
| 837 | break; |
| 838 | COE2( store_access_in_entry,((mode >> 3) & 7, entry) ); |
| 839 | break; |
| 840 | case SMB_ACL_MASK: |
| 841 | #ifndef ACLS_NEED_MASK |
| 842 | /* mask is only empty when we don't need it. */ |
| 843 | if (racl->mask_obj == NO_ENTRY) |
| 844 | break; |
| 845 | #endif |
| 846 | COE2( store_access_in_entry,((mode >> 3) & 7, entry) ); |
| 847 | break; |
| 848 | case SMB_ACL_OTHER: |
| 849 | COE2( store_access_in_entry,(mode & 7, entry) ); |
| 850 | break; |
| 851 | } |
| 852 | } |
| 853 | if (rc) { |
| 854 | error_exit: |
| 855 | if (errfun) { |
| 856 | rsyserr(FERROR, errno, "change_sacl_perms: %s()", |
| 857 | errfun); |
| 858 | } |
| 859 | return (mode_t)~0; |
| 860 | } |
| 861 | |
| 862 | #ifdef SMB_ACL_LOSES_SPECIAL_MODE_BITS |
| 863 | /* Ensure that chmod() will be called to restore any lost setid bits. */ |
| 864 | if (old_mode & (S_ISUID | S_ISGID | S_ISVTX) |
| 865 | && BITS_EQUAL(old_mode, mode, CHMOD_BITS)) |
| 866 | old_mode &= ~(S_ISUID | S_ISGID | S_ISVTX); |
| 867 | #endif |
| 868 | |
| 869 | /* Return the mode of the file on disk, as we will set them. */ |
| 870 | return (old_mode & ~ACCESSPERMS) | (mode & ACCESSPERMS); |
| 871 | } |
| 872 | #endif |
| 873 | |
| 874 | static int set_rsync_acl(const char *fname, acl_duo *duo_item, |
| 875 | SMB_ACL_TYPE_T type, stat_x *sxp, mode_t mode) |
| 876 | { |
| 877 | if (type == SMB_ACL_TYPE_DEFAULT |
| 878 | && duo_item->racl.user_obj == NO_ENTRY) { |
| 879 | int rc; |
| 880 | #ifdef SUPPORT_XATTRS |
| 881 | /* --fake-super support: delete default ACL from xattrs. */ |
| 882 | if (am_root < 0) |
| 883 | rc = del_def_xattr_acl(fname); |
| 884 | else |
| 885 | #endif |
| 886 | rc = sys_acl_delete_def_file(fname); |
| 887 | if (rc < 0) { |
| 888 | rsyserr(FERROR, errno, "set_acl: sys_acl_delete_def_file(%s)", |
| 889 | fname); |
| 890 | return -1; |
| 891 | } |
| 892 | #ifdef SUPPORT_XATTRS |
| 893 | } else if (am_root < 0) { |
| 894 | /* --fake-super support: store ACLs in an xattr. */ |
| 895 | int cnt = duo_item->racl.names.count; |
| 896 | size_t len = 4*4 + cnt * (4+4); |
| 897 | char *buf = new_array(char, len); |
| 898 | int rc; |
| 899 | |
| 900 | SIVAL(buf, 0, duo_item->racl.user_obj); |
| 901 | SIVAL(buf, 4, duo_item->racl.group_obj); |
| 902 | SIVAL(buf, 8, duo_item->racl.mask_obj); |
| 903 | SIVAL(buf, 12, duo_item->racl.other_obj); |
| 904 | |
| 905 | if (cnt) { |
| 906 | char *bp = buf + 4*4; |
| 907 | id_access *ida = duo_item->racl.names.idas; |
| 908 | for ( ; cnt--; ida++, bp += 4+4) { |
| 909 | SIVAL(bp, 0, ida->id); |
| 910 | SIVAL(bp, 4, ida->access); |
| 911 | } |
| 912 | } |
| 913 | rc = set_xattr_acl(fname, type == SMB_ACL_TYPE_ACCESS, buf, len); |
| 914 | free(buf); |
| 915 | return rc; |
| 916 | #endif |
| 917 | } else { |
| 918 | mode_t cur_mode = sxp->st.st_mode; |
| 919 | if (!duo_item->sacl |
| 920 | && !pack_smb_acl(&duo_item->sacl, &duo_item->racl)) |
| 921 | return -1; |
| 922 | #ifdef HAVE_OSX_ACLS |
| 923 | mode = 0; /* eliminate compiler warning */ |
| 924 | #else |
| 925 | if (type == SMB_ACL_TYPE_ACCESS) { |
| 926 | cur_mode = change_sacl_perms(duo_item->sacl, &duo_item->racl, |
| 927 | cur_mode, mode); |
| 928 | if (cur_mode == (mode_t)~0) |
| 929 | return 0; |
| 930 | } |
| 931 | #endif |
| 932 | if (sys_acl_set_file(fname, type, duo_item->sacl) < 0) { |
| 933 | rsyserr(FERROR, errno, "set_acl: sys_acl_set_file(%s, %s)", |
| 934 | fname, str_acl_type(type)); |
| 935 | return -1; |
| 936 | } |
| 937 | if (type == SMB_ACL_TYPE_ACCESS) |
| 938 | sxp->st.st_mode = cur_mode; |
| 939 | } |
| 940 | |
| 941 | return 0; |
| 942 | } |
| 943 | |
| 944 | /* Set ACL on indicated filename. |
| 945 | * |
| 946 | * This sets extended access ACL entries and default ACL. If convenient, |
| 947 | * it sets permission bits along with the access ACL and signals having |
| 948 | * done so by modifying sxp->st.st_mode. |
| 949 | * |
| 950 | * Returns 1 for unchanged, 0 for changed, -1 for failed. Call this |
| 951 | * with fname set to NULL to just check if the ACL is unchanged. */ |
| 952 | int set_acl(const char *fname, const struct file_struct *file, stat_x *sxp) |
| 953 | { |
| 954 | int unchanged = 1; |
| 955 | int32 ndx; |
| 956 | BOOL eq; |
| 957 | |
| 958 | if (!dry_run && (read_only || list_only)) { |
| 959 | errno = EROFS; |
| 960 | return -1; |
| 961 | } |
| 962 | |
| 963 | ndx = F_ACL(file); |
| 964 | if (ndx >= 0 && (size_t)ndx < access_acl_list.count) { |
| 965 | acl_duo *duo_item = access_acl_list.items; |
| 966 | duo_item += ndx; |
| 967 | eq = sxp->acc_acl |
| 968 | && rsync_acl_equal_enough(sxp->acc_acl, &duo_item->racl, file->mode); |
| 969 | if (!eq) { |
| 970 | unchanged = 0; |
| 971 | if (!dry_run && fname |
| 972 | && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_ACCESS, |
| 973 | sxp, file->mode) < 0) |
| 974 | unchanged = -1; |
| 975 | } |
| 976 | } |
| 977 | |
| 978 | if (!S_ISDIR(sxp->st.st_mode)) |
| 979 | return unchanged; |
| 980 | |
| 981 | ndx = F_DIR_DEFACL(file); |
| 982 | if (ndx >= 0 && (size_t)ndx < default_acl_list.count) { |
| 983 | acl_duo *duo_item = default_acl_list.items; |
| 984 | duo_item += ndx; |
| 985 | eq = sxp->def_acl && rsync_acl_equal(sxp->def_acl, &duo_item->racl); |
| 986 | if (!eq) { |
| 987 | if (unchanged > 0) |
| 988 | unchanged = 0; |
| 989 | if (!dry_run && fname |
| 990 | && set_rsync_acl(fname, duo_item, SMB_ACL_TYPE_DEFAULT, |
| 991 | sxp, file->mode) < 0) |
| 992 | unchanged = -1; |
| 993 | } |
| 994 | } |
| 995 | |
| 996 | return unchanged; |
| 997 | } |
| 998 | |
| 999 | /* Non-incremental recursion needs to convert all the received IDs. |
| 1000 | * This is done in a single pass after receiving the whole file-list. */ |
| 1001 | static void match_racl_ids(const item_list *racl_list) |
| 1002 | { |
| 1003 | int list_cnt, name_cnt; |
| 1004 | acl_duo *duo_item = racl_list->items; |
| 1005 | for (list_cnt = racl_list->count; list_cnt--; duo_item++) { |
| 1006 | ida_entries *idal = &duo_item->racl.names; |
| 1007 | id_access *ida = idal->idas; |
| 1008 | for (name_cnt = idal->count; name_cnt--; ida++) { |
| 1009 | if (ida->access & NAME_IS_USER) |
| 1010 | ida->id = match_uid(ida->id); |
| 1011 | else |
| 1012 | ida->id = match_gid(ida->id, NULL); |
| 1013 | } |
| 1014 | } |
| 1015 | } |
| 1016 | |
| 1017 | void match_acl_ids(void) |
| 1018 | { |
| 1019 | match_racl_ids(&access_acl_list); |
| 1020 | match_racl_ids(&default_acl_list); |
| 1021 | } |
| 1022 | |
| 1023 | /* This is used by dest_mode(). */ |
| 1024 | int default_perms_for_dir(const char *dir) |
| 1025 | { |
| 1026 | rsync_acl racl; |
| 1027 | SMB_ACL_T sacl; |
| 1028 | BOOL ok; |
| 1029 | int perms; |
| 1030 | |
| 1031 | if (dir == NULL) |
| 1032 | dir = "."; |
| 1033 | perms = ACCESSPERMS & ~orig_umask; |
| 1034 | /* Read the directory's default ACL. If it has none, this will successfully return an empty ACL. */ |
| 1035 | sacl = sys_acl_get_file(dir, SMB_ACL_TYPE_DEFAULT); |
| 1036 | if (sacl == NULL) { |
| 1037 | /* Couldn't get an ACL. Darn. */ |
| 1038 | switch (errno) { |
| 1039 | #ifdef ENOTSUP |
| 1040 | case ENOTSUP: |
| 1041 | #endif |
| 1042 | case ENOSYS: |
| 1043 | /* No ACLs are available. */ |
| 1044 | break; |
| 1045 | case ENOENT: |
| 1046 | if (dry_run) { |
| 1047 | /* We're doing a dry run, so the containing directory |
| 1048 | * wasn't actually created. Don't worry about it. */ |
| 1049 | break; |
| 1050 | } |
| 1051 | /* Otherwise fall through. */ |
| 1052 | default: |
| 1053 | rprintf(FERROR, "default_perms_for_dir: sys_acl_get_file(%s, %s): %s, falling back on umask\n", |
| 1054 | dir, str_acl_type(SMB_ACL_TYPE_DEFAULT), strerror(errno)); |
| 1055 | } |
| 1056 | return perms; |
| 1057 | } |
| 1058 | |
| 1059 | /* Convert it. */ |
| 1060 | racl = empty_rsync_acl; |
| 1061 | ok = unpack_smb_acl(sacl, &racl); |
| 1062 | sys_acl_free_acl(sacl); |
| 1063 | if (!ok) { |
| 1064 | rprintf(FERROR, "default_perms_for_dir: unpack_smb_acl failed, falling back on umask\n"); |
| 1065 | return perms; |
| 1066 | } |
| 1067 | |
| 1068 | /* Apply the permission-bit entries of the default ACL, if any. */ |
| 1069 | if (racl.user_obj != NO_ENTRY) { |
| 1070 | perms = rsync_acl_get_perms(&racl); |
| 1071 | if (verbose > 2) |
| 1072 | rprintf(FINFO, "got ACL-based default perms %o for directory %s\n", perms, dir); |
| 1073 | } |
| 1074 | |
| 1075 | rsync_acl_free(&racl); |
| 1076 | return perms; |
| 1077 | } |
| 1078 | |
| 1079 | #endif /* SUPPORT_ACLS */ |