| 1 | Depends-On-Patch: acls.diff |
| 2 | |
| 3 | After applying this patch, run these commands for a successful build: |
| 4 | |
| 5 | ./prepare-source |
| 6 | ./configure --enable-acl-support --enable-xattr-support |
| 7 | make |
| 8 | |
| 9 | TODO: |
| 10 | |
| 11 | - This patch needs to be rewritten to more efficiently handle large xattrs. |
| 12 | |
| 13 | - We need to affect the itemized output to know when xattrs are being updated. |
| 14 | |
| 15 | - We need to affect the --link-dest option to avoid hard-linking two files |
| 16 | that differ in their xattrs (when --xattrs was specified). |
| 17 | |
| 18 | --- old/Makefile.in |
| 19 | +++ new/Makefile.in |
| 20 | @@ -27,13 +27,13 @@ VERSION=@VERSION@ |
| 21 | |
| 22 | HEADERS=byteorder.h config.h errcode.h proto.h rsync.h smb_acls.h lib/pool_alloc.h |
| 23 | LIBOBJ=lib/wildmatch.o lib/compat.o lib/snprintf.o lib/mdfour.o \ |
| 24 | - lib/permstring.o lib/pool_alloc.o lib/sysacls.o @LIBOBJS@ |
| 25 | + lib/permstring.o lib/pool_alloc.o lib/sysacls.o lib/sysxattr.o @LIBOBJS@ |
| 26 | ZLIBOBJ=zlib/deflate.o zlib/inffast.o zlib/inflate.o zlib/inftrees.o \ |
| 27 | zlib/trees.o zlib/zutil.o zlib/adler32.o zlib/compress.o zlib/crc32.o |
| 28 | OBJS1=rsync.o generator.o receiver.o cleanup.o sender.o exclude.o util.o \ |
| 29 | main.o checksum.o match.o syscall.o log.o backup.o |
| 30 | OBJS2=options.o flist.o io.o compat.o hlink.o token.o uidlist.o socket.o \ |
| 31 | - fileio.o batch.o clientname.o chmod.o acls.o |
| 32 | + fileio.o batch.o clientname.o chmod.o acls.o xattr.o |
| 33 | OBJS3=progress.o pipe.o |
| 34 | DAEMON_OBJ = params.o loadparm.o clientserver.o access.o connection.o authenticate.o |
| 35 | popt_OBJS=popt/findme.o popt/popt.o popt/poptconfig.o \ |
| 36 | --- old/acls.c |
| 37 | +++ new/acls.c |
| 38 | @@ -29,6 +29,7 @@ extern int am_root; |
| 39 | extern int dry_run; |
| 40 | extern int orig_umask; |
| 41 | extern int preserve_acls; |
| 42 | +extern int preserve_xattrs; |
| 43 | extern unsigned int file_struct_len; |
| 44 | |
| 45 | /* === ACL structures === */ |
| 46 | @@ -743,6 +744,10 @@ void receive_acl(struct file_struct *fil |
| 47 | type = SMB_ACL_TYPE_ACCESS; |
| 48 | racl_list = &access_acl_list; |
| 49 | ndx_ptr = (char*)file + file_struct_len; |
| 50 | +#ifdef SUPPORT_XATTRS |
| 51 | + if (preserve_xattrs) |
| 52 | + ndx_ptr += 4; |
| 53 | +#endif |
| 54 | do { |
| 55 | char tag = read_byte(f); |
| 56 | int ndx; |
| 57 | @@ -801,6 +806,10 @@ void cache_acl(struct file_struct *file, |
| 58 | racl = sxp->acc_acl; |
| 59 | racl_list = &access_acl_list; |
| 60 | ndx_ptr = (char*)file + file_struct_len; |
| 61 | +#ifdef SUPPORT_XATTRS |
| 62 | + if (preserve_xattrs) |
| 63 | + ndx_ptr += 4; |
| 64 | +#endif |
| 65 | do { |
| 66 | if (!racl) |
| 67 | ndx = -1; |
| 68 | @@ -916,6 +925,10 @@ int set_acl(const char *fname, const str |
| 69 | |
| 70 | type = SMB_ACL_TYPE_ACCESS; |
| 71 | ndx_ptr = (char*)file + file_struct_len; |
| 72 | +#ifdef SUPPORT_XATTRS |
| 73 | + if (preserve_xattrs) |
| 74 | + ndx_ptr += 4; |
| 75 | +#endif |
| 76 | do { |
| 77 | acl_duo *duo_item; |
| 78 | BOOL eq; |
| 79 | --- old/backup.c |
| 80 | +++ new/backup.c |
| 81 | @@ -30,6 +30,7 @@ extern char *backup_dir; |
| 82 | |
| 83 | extern int am_root; |
| 84 | extern int preserve_acls; |
| 85 | +extern int preserve_xattrs; |
| 86 | extern int preserve_devices; |
| 87 | extern int preserve_specials; |
| 88 | extern int preserve_links; |
| 89 | @@ -136,6 +137,9 @@ static int make_bak_dir(char *fullpath) |
| 90 | #ifdef SUPPORT_ACLS |
| 91 | sx.acc_acl = sx.def_acl = NULL; |
| 92 | #endif |
| 93 | +#ifdef SUPPORT_XATTRS |
| 94 | + sx.xattr = NULL; |
| 95 | +#endif |
| 96 | if (!(file = make_file(rel, NULL, NULL, 0, NO_FILTERS))) |
| 97 | continue; |
| 98 | #ifdef SUPPORT_ACLS |
| 99 | @@ -144,6 +148,12 @@ static int make_bak_dir(char *fullpath) |
| 100 | cache_acl(file, &sx); |
| 101 | } |
| 102 | #endif |
| 103 | +#ifdef SUPPORT_XATTRS |
| 104 | + if (preserve_xattrs) { |
| 105 | + get_xattr(rel, &sx); |
| 106 | + cache_xattr(file, &sx); |
| 107 | + } |
| 108 | +#endif |
| 109 | set_file_attrs(fullpath, file, NULL, 0); |
| 110 | free(file); |
| 111 | } |
| 112 | @@ -195,6 +205,9 @@ static int keep_backup(char *fname) |
| 113 | #ifdef SUPPORT_ACLS |
| 114 | sx.acc_acl = sx.def_acl = NULL; |
| 115 | #endif |
| 116 | +#ifdef SUPPORT_XATTRS |
| 117 | + sx.xattr = NULL; |
| 118 | +#endif |
| 119 | |
| 120 | if (!(file = make_file(fname, NULL, NULL, 0, NO_FILTERS))) |
| 121 | return 1; /* the file could have disappeared */ |
| 122 | @@ -208,6 +221,12 @@ static int keep_backup(char *fname) |
| 123 | cache_acl(file, &sx); |
| 124 | } |
| 125 | #endif |
| 126 | +#ifdef SUPPORT_XATTRS |
| 127 | + if (preserve_xattrs) { |
| 128 | + get_xattr(fname, &sx); |
| 129 | + cache_xattr(file, &sx); |
| 130 | + } |
| 131 | +#endif |
| 132 | |
| 133 | /* Check to see if this is a device file, or link */ |
| 134 | if ((am_root && preserve_devices && IS_DEVICE(file->mode)) |
| 135 | --- old/configure.in |
| 136 | +++ new/configure.in |
| 137 | @@ -823,6 +823,30 @@ samba_cv_HAVE_ACL_GET_PERM_NP=yes,samba_ |
| 138 | AC_MSG_RESULT(no) |
| 139 | ) |
| 140 | |
| 141 | +AC_CHECK_HEADERS(attr/xattr.h) |
| 142 | +AC_MSG_CHECKING(whether to support extended attributes) |
| 143 | +AC_ARG_ENABLE(xattr-support, |
| 144 | +AC_HELP_STRING([--enable-xattr-support], [Include extended attribute support (default=no)]), |
| 145 | +[ case "$enableval" in |
| 146 | + yes) |
| 147 | + case "$host_os" in |
| 148 | + *linux*) |
| 149 | + AC_MSG_RESULT(Using Linux xattrs) |
| 150 | + AC_DEFINE(HAVE_LINUX_XATTRS, 1, [True if you have Linux xattrs]) |
| 151 | + ;; |
| 152 | + *) |
| 153 | + AC_MSG_RESULT(Xattrs requested but not linux. Good luck) |
| 154 | + ;; |
| 155 | + esac |
| 156 | + ;; |
| 157 | + *) |
| 158 | + AC_MSG_RESULT(no) |
| 159 | + AC_DEFINE(HAVE_NA_XATTRS, 1, [True if you don't have extended attributes]) |
| 160 | + esac ], |
| 161 | + AC_MSG_RESULT(no) |
| 162 | + AC_DEFINE(HAVE_NO_XATTRL, 1, [True if you don't have extended attributes]) |
| 163 | +) |
| 164 | + |
| 165 | AC_CONFIG_FILES([Makefile lib/dummy zlib/dummy popt/dummy shconfig]) |
| 166 | AC_OUTPUT |
| 167 | |
| 168 | --- old/flist.c |
| 169 | +++ new/flist.c |
| 170 | @@ -41,6 +41,7 @@ extern int one_file_system; |
| 171 | extern int copy_dirlinks; |
| 172 | extern int keep_dirlinks; |
| 173 | extern int preserve_acls; |
| 174 | +extern int preserve_xattrs; |
| 175 | extern int preserve_links; |
| 176 | extern int preserve_hard_links; |
| 177 | extern int preserve_devices; |
| 178 | @@ -494,7 +495,7 @@ static struct file_struct *receive_file_ |
| 179 | char thisname[MAXPATHLEN]; |
| 180 | unsigned int l1 = 0, l2 = 0; |
| 181 | int alloc_len, basename_len, dirname_len, linkname_len, sum_len; |
| 182 | -#ifdef SUPPORT_ACLS |
| 183 | +#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS |
| 184 | int xtra_len; |
| 185 | #endif |
| 186 | OFF_T file_length; |
| 187 | @@ -606,10 +607,16 @@ static struct file_struct *receive_file_ |
| 188 | xtra_len = (S_ISDIR(mode) ? 2 : 1) * 4; |
| 189 | else |
| 190 | xtra_len = 0; |
| 191 | +#elif defined SUPPORT_XATTRS |
| 192 | + xtra_len = 0; |
| 193 | +#endif |
| 194 | +#ifdef SUPPORT_XATTRS |
| 195 | + if (preserve_xattrs) |
| 196 | + xtra_len += 4; |
| 197 | #endif |
| 198 | |
| 199 | alloc_len = file_struct_len + dirname_len + basename_len |
| 200 | -#ifdef SUPPORT_ACLS |
| 201 | +#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS |
| 202 | + xtra_len |
| 203 | #endif |
| 204 | + linkname_len + sum_len; |
| 205 | @@ -618,7 +625,7 @@ static struct file_struct *receive_file_ |
| 206 | file = (struct file_struct *)bp; |
| 207 | memset(bp, 0, file_struct_len); |
| 208 | bp += file_struct_len; |
| 209 | -#ifdef SUPPORT_ACLS |
| 210 | +#if defined SUPPORT_ACLS || defined SUPPORT_XATTRS |
| 211 | bp += xtra_len; |
| 212 | #endif |
| 213 | |
| 214 | @@ -717,6 +724,10 @@ static struct file_struct *receive_file_ |
| 215 | if (preserve_acls) |
| 216 | receive_acl(file, f); |
| 217 | #endif |
| 218 | +#ifdef SUPPORT_XATTRS |
| 219 | + if (preserve_xattrs) |
| 220 | + receive_xattr(file, f ); |
| 221 | +#endif |
| 222 | |
| 223 | return file; |
| 224 | } |
| 225 | @@ -987,6 +998,13 @@ static struct file_struct *send_file_nam |
| 226 | return NULL; |
| 227 | } |
| 228 | #endif |
| 229 | +#ifdef SUPPORT_XATTRS |
| 230 | + if (preserve_xattrs) { |
| 231 | + sx.xattr = NULL; |
| 232 | + if (get_xattr(fname, &sx) < 0) |
| 233 | + return NULL; |
| 234 | + } |
| 235 | +#endif |
| 236 | |
| 237 | maybe_emit_filelist_progress(flist->count + flist_count_offset); |
| 238 | |
| 239 | @@ -999,11 +1017,19 @@ static struct file_struct *send_file_nam |
| 240 | if (preserve_acls) |
| 241 | send_acl(&sx, f); |
| 242 | #endif |
| 243 | +#ifdef SUPPORT_XATTRS |
| 244 | + if (preserve_xattrs) |
| 245 | + send_xattr(&sx, f); |
| 246 | +#endif |
| 247 | } else { |
| 248 | #ifdef SUPPORT_ACLS |
| 249 | if (preserve_acls) |
| 250 | free_acl(&sx); |
| 251 | #endif |
| 252 | +#ifdef SUPPORT_XATTRS |
| 253 | + if (preserve_xattrs) |
| 254 | + free_xattr(&sx); |
| 255 | +#endif |
| 256 | } |
| 257 | return file; |
| 258 | } |
| 259 | --- old/lib/sysxattr.c |
| 260 | +++ new/lib/sysxattr.c |
| 261 | @@ -0,0 +1,44 @@ |
| 262 | +/* |
| 263 | + * Extended attribute support for rsync. |
| 264 | + * |
| 265 | + * Copyright (C) 2004 Red Hat, Inc. |
| 266 | + * Written by Jay Fenlason. |
| 267 | + * |
| 268 | + * This program is free software; you can redistribute it and/or modify |
| 269 | + * it under the terms of the GNU General Public License as published by |
| 270 | + * the Free Software Foundation; either version 2 of the License, or |
| 271 | + * (at your option) any later version. |
| 272 | + * |
| 273 | + * This program is distributed in the hope that it will be useful, |
| 274 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 275 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 276 | + * GNU General Public License for more details. |
| 277 | + * |
| 278 | + * You should have received a copy of the GNU General Public License along |
| 279 | + * with this program; if not, write to the Free Software Foundation, Inc., |
| 280 | + * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
| 281 | + */ |
| 282 | + |
| 283 | +#include "rsync.h" |
| 284 | +#include "sysxattr.h" |
| 285 | + |
| 286 | +#if defined HAVE_LINUX_XATTRS |
| 287 | + |
| 288 | +ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size) |
| 289 | +{ |
| 290 | + return lgetxattr(path, name, value, size); |
| 291 | +} |
| 292 | + |
| 293 | +int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags) |
| 294 | +{ |
| 295 | + return lsetxattr(path, name, value, size, flags); |
| 296 | +} |
| 297 | + |
| 298 | +ssize_t sys_llistxattr(const char *path, char *list, size_t size) |
| 299 | +{ |
| 300 | + return llistxattr(path, list, size); |
| 301 | +} |
| 302 | + |
| 303 | +#else |
| 304 | + |
| 305 | +#endif /* No xattrs */ |
| 306 | --- old/lib/sysxattr.h |
| 307 | +++ new/lib/sysxattr.h |
| 308 | @@ -0,0 +1,13 @@ |
| 309 | +#if defined SUPPORT_XATTRS && defined HAVE_ATTR_XATTR_H |
| 310 | +#include <attr/xattr.h> |
| 311 | +#endif |
| 312 | + |
| 313 | +#if defined HAVE_LINUX_XATTRS |
| 314 | + |
| 315 | +ssize_t sys_lgetxattr(const char *path, const char *name, void *value, size_t size); |
| 316 | +int sys_lsetxattr(const char *path, const char *name, const void *value, size_t size, int flags); |
| 317 | +ssize_t sys_llistxattr(const char *path, char *list, size_t size); |
| 318 | + |
| 319 | +#else |
| 320 | + |
| 321 | +#endif /* No xattrs */ |
| 322 | --- old/options.c |
| 323 | +++ new/options.c |
| 324 | @@ -48,6 +48,7 @@ int copy_links = 0; |
| 325 | int preserve_links = 0; |
| 326 | int preserve_hard_links = 0; |
| 327 | int preserve_acls = 0; |
| 328 | +int preserve_xattrs = 0; |
| 329 | int preserve_perms = 0; |
| 330 | int preserve_executability = 0; |
| 331 | int preserve_devices = 0; |
| 332 | @@ -200,6 +201,7 @@ static void print_rsync_version(enum log |
| 333 | char const *have_inplace = "no "; |
| 334 | char const *hardlinks = "no "; |
| 335 | char const *acls = "no "; |
| 336 | + char const *xattrs = "no "; |
| 337 | char const *links = "no "; |
| 338 | char const *ipv6 = "no "; |
| 339 | STRUCT_STAT *dumstat; |
| 340 | @@ -219,7 +221,9 @@ static void print_rsync_version(enum log |
| 341 | #ifdef SUPPORT_ACLS |
| 342 | acls = ""; |
| 343 | #endif |
| 344 | - |
| 345 | +#ifdef SUPPORT_XATTRS |
| 346 | + xattrs = ""; |
| 347 | +#endif |
| 348 | #ifdef SUPPORT_LINKS |
| 349 | links = ""; |
| 350 | #endif |
| 351 | @@ -233,9 +237,9 @@ static void print_rsync_version(enum log |
| 352 | rprintf(f, "Copyright (C) 1996-2006 by Andrew Tridgell, Wayne Davison, and others.\n"); |
| 353 | rprintf(f, "<http://rsync.samba.org/>\n"); |
| 354 | rprintf(f, "Capabilities: %d-bit files, %ssocketpairs, " |
| 355 | - "%shard links, %sACLs, %ssymlinks, batchfiles,\n", |
| 356 | + "%shard links, %sACLs, %sxattrs, %ssymlinks, batchfiles,\n", |
| 357 | (int) (sizeof (OFF_T) * 8), |
| 358 | - got_socketpair, hardlinks, acls, links); |
| 359 | + got_socketpair, hardlinks, acls, xattrs, links); |
| 360 | |
| 361 | /* Note that this field may not have type ino_t. It depends |
| 362 | * on the complicated interaction between largefile feature |
| 363 | @@ -308,6 +312,9 @@ void usage(enum logcode F) |
| 364 | #ifdef SUPPORT_ACLS |
| 365 | rprintf(F," -A, --acls preserve ACLs (implies --perms)\n"); |
| 366 | #endif |
| 367 | +#ifdef SUPPORT_XATTRS |
| 368 | + rprintf(F," -X, --xattrs preserve extended attributes (implies --perms)\n"); |
| 369 | +#endif |
| 370 | rprintf(F," --chmod=CHMOD change destination permissions\n"); |
| 371 | rprintf(F," -o, --owner preserve owner (super-user only)\n"); |
| 372 | rprintf(F," -g, --group preserve group\n"); |
| 373 | @@ -427,6 +434,9 @@ static struct poptOption long_options[] |
| 374 | {"acls", 'A', POPT_ARG_NONE, 0, 'A', 0, 0 }, |
| 375 | {"no-acls", 0, POPT_ARG_VAL, &preserve_acls, 0, 0, 0 }, |
| 376 | {"no-A", 0, POPT_ARG_VAL, &preserve_acls, 0, 0, 0 }, |
| 377 | + {"xattrs", 'X', POPT_ARG_NONE, 0, 'X', 0, 0 }, |
| 378 | + {"no-xattrs", 0, POPT_ARG_VAL, &preserve_xattrs, 0, 0, 0 }, |
| 379 | + {"no-X", 0, POPT_ARG_VAL, &preserve_xattrs, 0, 0, 0 }, |
| 380 | {"times", 't', POPT_ARG_VAL, &preserve_times, 1, 0, 0 }, |
| 381 | {"no-times", 0, POPT_ARG_VAL, &preserve_times, 0, 0, 0 }, |
| 382 | {"no-t", 0, POPT_ARG_VAL, &preserve_times, 0, 0, 0 }, |
| 383 | @@ -1109,6 +1119,17 @@ int parse_arguments(int *argc, const cha |
| 384 | return 0; |
| 385 | #endif |
| 386 | |
| 387 | + case 'X': |
| 388 | +#ifdef SUPPORT_XATTRS |
| 389 | + preserve_xattrs = 1; |
| 390 | + preserve_perms = 1; |
| 391 | + break; |
| 392 | +#else |
| 393 | + snprintf(err_buf,sizeof(err_buf), |
| 394 | + "extended attributes are not supported on this %s\n", |
| 395 | + am_server ? "server" : "client"); |
| 396 | + return 0; |
| 397 | +#endif /* SUPPORT_XATTRS */ |
| 398 | |
| 399 | default: |
| 400 | /* A large opt value means that set_refuse_options() |
| 401 | @@ -1560,6 +1581,10 @@ void server_options(char **args,int *arg |
| 402 | if (preserve_acls) |
| 403 | argstr[x++] = 'A'; |
| 404 | #endif |
| 405 | +#ifdef SUPPORT_XATTRS |
| 406 | + if (preserve_xattrs) |
| 407 | + argstr[x++] = 'X'; |
| 408 | +#endif |
| 409 | if (preserve_uid) |
| 410 | argstr[x++] = 'o'; |
| 411 | if (preserve_gid) |
| 412 | --- old/rsync.c |
| 413 | +++ new/rsync.c |
| 414 | @@ -34,6 +34,7 @@ extern int verbose; |
| 415 | extern int dry_run; |
| 416 | extern int logfile_format_has_i; |
| 417 | extern int preserve_acls; |
| 418 | +extern int preserve_xattrs; |
| 419 | extern int preserve_perms; |
| 420 | extern int preserve_executability; |
| 421 | extern int preserve_times; |
| 422 | @@ -223,6 +224,10 @@ int set_file_attrs(char *fname, struct f |
| 423 | if (preserve_acls && set_acl(fname, file, sxp) == 0) |
| 424 | updated = 1; |
| 425 | #endif |
| 426 | +#ifdef SUPPORT_XATTRS |
| 427 | + if (preserve_xattrs && set_xattr(fname, file, sxp) == 0) |
| 428 | + updated = 1; |
| 429 | +#endif |
| 430 | |
| 431 | #ifdef HAVE_CHMOD |
| 432 | if ((sxp->st.st_mode & CHMOD_BITS) != (file->mode & CHMOD_BITS)) { |
| 433 | --- old/rsync.h |
| 434 | +++ new/rsync.h |
| 435 | @@ -495,6 +495,10 @@ struct idev { |
| 436 | #define ACLS_NEED_MASK 1 |
| 437 | #endif |
| 438 | |
| 439 | +#ifdef HAVE_LINUX_XATTRS |
| 440 | +#define SUPPORT_XATTRS 1 |
| 441 | +#endif |
| 442 | + |
| 443 | #define GID_NONE ((gid_t)-1) |
| 444 | |
| 445 | #define HL_CHECK_MASTER 0 |
| 446 | @@ -687,6 +691,9 @@ typedef struct { |
| 447 | struct rsync_acl *acc_acl; /* access ACL */ |
| 448 | struct rsync_acl *def_acl; /* default ACL */ |
| 449 | #endif |
| 450 | +#ifdef SUPPORT_XATTRS |
| 451 | + item_list *xattr; |
| 452 | +#endif |
| 453 | } statx; |
| 454 | |
| 455 | #define ACL_READY(sx) ((sx).acc_acl != NULL) |
| 456 | --- old/rsync.yo |
| 457 | +++ new/rsync.yo |
| 458 | @@ -322,6 +322,7 @@ to the detailed description below for a |
| 459 | -p, --perms preserve permissions |
| 460 | -E, --executability preserve executability |
| 461 | -A, --acls preserve ACLs (implies -p) [non-standard] |
| 462 | + -X, --xattrs preserve extended attrs (implies -p) [n.s.] |
| 463 | --chmod=CHMOD change destination permissions |
| 464 | -o, --owner preserve owner (super-user only) |
| 465 | -g, --group preserve group |
| 466 | @@ -809,6 +810,11 @@ version makes it incompatible with sendi |
| 467 | rsync unless you double the bf(--acls) option (e.g. bf(-AA)). This |
| 468 | doubling is not needed when pulling files from an older rsync. |
| 469 | |
| 470 | +dit(bf(-X, --xattrs)) This option causes rsync to update the remote |
| 471 | +extended attributes to be the same as the local ones. This will work |
| 472 | +only if the remote machine's rsync supports this option also. This is |
| 473 | +a non-standard option. |
| 474 | + |
| 475 | dit(bf(--chmod)) This option tells rsync to apply one or more |
| 476 | comma-separated "chmod" strings to the permission of the files in the |
| 477 | transfer. The resulting value is treated as though it was the permissions |
| 478 | --- old/xattr.c |
| 479 | +++ new/xattr.c |
| 480 | @@ -0,0 +1,358 @@ |
| 481 | +/* |
| 482 | + * Extended Attribute support for rsync. |
| 483 | + * Written by Jay Fenlason, vaguely based on the ACLs patch. |
| 484 | + * |
| 485 | + * Copyright (C) 2004 Red Hat, Inc. |
| 486 | + * Copyright (C) 2006 Wayne Davison |
| 487 | + * |
| 488 | + * This program is free software; you can redistribute it and/or modify |
| 489 | + * it under the terms of the GNU General Public License as published by |
| 490 | + * the Free Software Foundation; either version 2 of the License, or |
| 491 | + * (at your option) any later version. |
| 492 | + * |
| 493 | + * This program is distributed in the hope that it will be useful, |
| 494 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 495 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 496 | + * GNU General Public License for more details. |
| 497 | + * |
| 498 | + * You should have received a copy of the GNU General Public License along |
| 499 | + * with this program; if not, write to the Free Software Foundation, Inc., |
| 500 | + * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. |
| 501 | + */ |
| 502 | + |
| 503 | +#include "rsync.h" |
| 504 | +#include "lib/sysxattr.h" |
| 505 | + |
| 506 | +#ifdef SUPPORT_XATTRS |
| 507 | + |
| 508 | +extern int dry_run; |
| 509 | +extern unsigned int file_struct_len; |
| 510 | + |
| 511 | +#define RSYNC_XAL_INITIAL 5 |
| 512 | +#define RSYNC_XAL_LIST_INITIAL 100 |
| 513 | + |
| 514 | +typedef struct { |
| 515 | + char *name; |
| 516 | + char *datum; |
| 517 | + size_t name_len; |
| 518 | + size_t datum_len; |
| 519 | +} rsync_xa; |
| 520 | + |
| 521 | +static size_t namebuf_len = 0; |
| 522 | +static char *namebuf = NULL; |
| 523 | + |
| 524 | +static size_t datumbuf_len = 0; |
| 525 | +static char *datumbuf = NULL; |
| 526 | + |
| 527 | +static item_list empty_xattr = EMPTY_ITEM_LIST; |
| 528 | +static item_list rsync_xal_l = EMPTY_ITEM_LIST; |
| 529 | + |
| 530 | +/* ------------------------------------------------------------------------- */ |
| 531 | + |
| 532 | +static void rsync_xal_free(item_list *xalp) |
| 533 | +{ |
| 534 | + size_t i; |
| 535 | + rsync_xa *rxas = xalp->items; |
| 536 | + |
| 537 | + for (i = 0; i < xalp->count; i++) { |
| 538 | + free(rxas[i].name); |
| 539 | + /* free(rxas[i].value); */ |
| 540 | + } |
| 541 | + xalp->count = 0; |
| 542 | +} |
| 543 | + |
| 544 | +void free_xattr(statx *sxp) |
| 545 | +{ |
| 546 | + rsync_xal_free(sxp->xattr); |
| 547 | + free(sxp->xattr); |
| 548 | + sxp->xattr = NULL; |
| 549 | +} |
| 550 | + |
| 551 | +static int rsync_xal_compare_names(const void *x1, const void *x2) |
| 552 | +{ |
| 553 | + const rsync_xa *xa1 = x1; |
| 554 | + const rsync_xa *xa2 = x2; |
| 555 | + return strcmp(xa1->name, xa2->name); |
| 556 | +} |
| 557 | + |
| 558 | +static int rsync_xal_get(const char *fname, item_list *xalp) |
| 559 | +{ |
| 560 | + ssize_t name_size; |
| 561 | + ssize_t datum_size; |
| 562 | + ssize_t left; |
| 563 | + char *name; |
| 564 | + size_t len; |
| 565 | + char *ptr; |
| 566 | + |
| 567 | + if (!namebuf) { |
| 568 | + namebuf_len = 100; |
| 569 | + namebuf = new_array(char, namebuf_len); |
| 570 | + datumbuf_len = 100; |
| 571 | + datumbuf = new_array(char, datumbuf_len); |
| 572 | + if (!namebuf || !datumbuf) |
| 573 | + out_of_memory("rsync_xal_get"); |
| 574 | + } |
| 575 | + |
| 576 | + name_size = sys_llistxattr(fname, namebuf, namebuf_len); |
| 577 | + if (name_size > (ssize_t)namebuf_len) { |
| 578 | + name_size = -1; |
| 579 | + errno = ERANGE; |
| 580 | + } |
| 581 | + if (name_size < 0) { |
| 582 | + if (errno == ENOTSUP) |
| 583 | + return 0; |
| 584 | + if (errno == ERANGE) { |
| 585 | + name_size = sys_llistxattr(fname, NULL, 0); |
| 586 | + if (name_size < 0) { |
| 587 | + rsyserr(FERROR, errno, "%s: rsync_xal_get: llistxattr", |
| 588 | + fname); |
| 589 | + return -1; |
| 590 | + } |
| 591 | + namebuf = realloc_array(namebuf, char, name_size + 1); |
| 592 | + if (!namebuf) |
| 593 | + out_of_memory("rsync_xal_get"); |
| 594 | + namebuf_len = name_size; |
| 595 | + name_size = sys_llistxattr(fname, namebuf, namebuf_len); |
| 596 | + if (name_size < 0) { |
| 597 | + rsyserr(FERROR, errno, |
| 598 | + "%s: rsync_xal_get: re-llistxattr failed", |
| 599 | + fname); |
| 600 | + return -1; |
| 601 | + } |
| 602 | + } else { |
| 603 | + rsyserr(FERROR, errno, |
| 604 | + "%s: rsync_xal_get: llistxattr failed:", |
| 605 | + fname); |
| 606 | + return -1; |
| 607 | + } |
| 608 | + } |
| 609 | + if (name_size == 0) |
| 610 | + return 0; |
| 611 | + for (left = name_size, name = namebuf; left > 0 ; left -= len, name += len) { |
| 612 | + rsync_xa *rxas = EXPAND_ITEM_LIST(xalp, rsync_xa, RSYNC_XAL_INITIAL); |
| 613 | + |
| 614 | + len = strlen(name) + 1; |
| 615 | + datum_size = sys_lgetxattr(fname, name, datumbuf, datumbuf_len); |
| 616 | + if (datum_size > (ssize_t)datumbuf_len) { |
| 617 | + datum_size = -1; |
| 618 | + errno = ERANGE; |
| 619 | + } |
| 620 | + if (datum_size < 0) { |
| 621 | + if (errno == ENOTSUP) |
| 622 | + return -1; |
| 623 | + if (errno == ERANGE) { |
| 624 | + datum_size = sys_lgetxattr(fname, name, NULL, 0); |
| 625 | + if (datum_size < 0) { |
| 626 | + rsyserr(FERROR, errno, |
| 627 | + "%s: rsync_xal_get: lgetxattr %s failed", |
| 628 | + fname, name); |
| 629 | + return -1; |
| 630 | + } |
| 631 | + datumbuf = realloc_array(datumbuf, char, datum_size + 1); |
| 632 | + if (!datumbuf) |
| 633 | + out_of_memory("rsync_xal_get"); |
| 634 | + datumbuf_len = datum_size; |
| 635 | + datum_size = sys_lgetxattr(fname, name, datumbuf, datumbuf_len); |
| 636 | + if (datum_size < 0) { |
| 637 | + rsyserr(FERROR, errno, |
| 638 | + "%s: rsync_xal_get: re-lgetxattr of %s failed", |
| 639 | + name, fname); |
| 640 | + return -1; |
| 641 | + } |
| 642 | + } else { |
| 643 | + rsyserr(FERROR, errno, |
| 644 | + "%s: rsync_xal_get: lgetxattr %s failed", |
| 645 | + fname, name); |
| 646 | + return -1; |
| 647 | + } |
| 648 | + } |
| 649 | + ptr = new_array(char, len + datum_size); |
| 650 | + if (!ptr) |
| 651 | + out_of_memory("rsync_xal_get"); |
| 652 | + memcpy(ptr, name, len); |
| 653 | + if (datum_size) |
| 654 | + memcpy(ptr + len, datumbuf, datum_size); |
| 655 | + rxas->name_len = len; |
| 656 | + rxas->name = ptr; |
| 657 | + rxas->datum_len = datum_size; |
| 658 | + rxas->datum = ptr + len; |
| 659 | + } |
| 660 | + if (xalp->count > 1) |
| 661 | + qsort(xalp->items, xalp->count, sizeof (rsync_xa), rsync_xal_compare_names); |
| 662 | + return 0; |
| 663 | +} |
| 664 | + |
| 665 | +/* Read the xattr(s) for this filename. */ |
| 666 | +int get_xattr(const char *fname, statx *sxp) |
| 667 | +{ |
| 668 | + sxp->xattr = new(item_list); |
| 669 | + *sxp->xattr = empty_xattr; |
| 670 | + if (rsync_xal_get(fname, sxp->xattr) < 0) { |
| 671 | + free_xattr(sxp); |
| 672 | + return -1; |
| 673 | + } |
| 674 | + return 0; |
| 675 | +} |
| 676 | + |
| 677 | +static int find_matching_xattr(item_list *xalp) |
| 678 | +{ |
| 679 | + size_t i, j; |
| 680 | + item_list *lst = rsync_xal_l.items; |
| 681 | + |
| 682 | + for (i = 0; i < rsync_xal_l.count; i++) { |
| 683 | + rsync_xa *rxas1 = lst[i].items; |
| 684 | + rsync_xa *rxas2 = xalp->items; |
| 685 | + |
| 686 | + /* Wrong number of elements? */ |
| 687 | + if (lst[i].count != xalp->count) |
| 688 | + continue; |
| 689 | + /* any elements different? */ |
| 690 | + for (j = 0; j < xalp->count; j++) { |
| 691 | + if (rxas1[j].name_len != rxas2[j].name_len |
| 692 | + || rxas1[j].datum_len != rxas2[j].datum_len |
| 693 | + || strcmp(rxas1[j].name, rxas2[j].name) |
| 694 | + || memcmp(rxas1[j].datum, rxas2[j].datum, rxas2[j].datum_len)) |
| 695 | + break; |
| 696 | + } |
| 697 | + /* no differences found. This is The One! */ |
| 698 | + if (j == xalp->count) |
| 699 | + return i; |
| 700 | + } |
| 701 | + |
| 702 | + return -1; |
| 703 | +} |
| 704 | + |
| 705 | +/* Store *xalp on the end of rsync_xal_l */ |
| 706 | +static void rsync_xal_store(item_list *xalp) |
| 707 | +{ |
| 708 | + item_list *new_lst = EXPAND_ITEM_LIST(&rsync_xal_l, item_list, RSYNC_XAL_LIST_INITIAL); |
| 709 | + EXPAND_ITEM_LIST(new_lst, item_list, xalp->count); |
| 710 | + memcpy(new_lst->items, xalp->items, xalp->count * sizeof (item_list)); |
| 711 | + new_lst->count = xalp->count; |
| 712 | + xalp->count = 0; |
| 713 | +} |
| 714 | + |
| 715 | +/* Send the make_xattr()-generated xattr list for this flist entry. */ |
| 716 | +void send_xattr(statx *sxp, int f) |
| 717 | +{ |
| 718 | + int ndx = find_matching_xattr(sxp->xattr); |
| 719 | + if (ndx != -1) { |
| 720 | + write_byte(f, 'x'); |
| 721 | + write_int(f, ndx); |
| 722 | + rsync_xal_free(sxp->xattr); |
| 723 | + } else { |
| 724 | + rsync_xa *rxa; |
| 725 | + int count = sxp->xattr->count; |
| 726 | + write_byte(f, 'X'); |
| 727 | + write_int(f, count); |
| 728 | + for (rxa = sxp->xattr->items; count--; rxa++) { |
| 729 | + write_int(f, rxa->name_len); |
| 730 | + write_int(f, rxa->datum_len); |
| 731 | + write_buf(f, rxa->name, rxa->name_len); |
| 732 | + write_buf(f, rxa->datum, rxa->datum_len); |
| 733 | + } |
| 734 | + rsync_xal_store(sxp->xattr); |
| 735 | + } |
| 736 | + free_xattr(sxp); |
| 737 | +} |
| 738 | + |
| 739 | +/* ------------------------------------------------------------------------- */ |
| 740 | + |
| 741 | +/* receive and build the rsync_xattr_lists */ |
| 742 | +void receive_xattr(struct file_struct *file, int f) |
| 743 | +{ |
| 744 | + static item_list temp_xattr = EMPTY_ITEM_LIST; |
| 745 | + int tag = read_byte(f); |
| 746 | + char *ndx_ptr = (char*)file + file_struct_len; |
| 747 | + int ndx; |
| 748 | + |
| 749 | + if (tag == 'X') { |
| 750 | + int i, count = read_int(f); |
| 751 | + for (i = 0; i < count; i++) { |
| 752 | + char *ptr; |
| 753 | + rsync_xa *rxa; |
| 754 | + size_t name_len = read_int(f); |
| 755 | + size_t datum_len = read_int(f); |
| 756 | + if (name_len + datum_len < name_len) |
| 757 | + out_of_memory("receive_xattr"); /* overflow */ |
| 758 | + rxa = EXPAND_ITEM_LIST(&temp_xattr, rsync_xa, count); |
| 759 | + ptr = new_array(char, name_len + datum_len); |
| 760 | + if (!ptr) |
| 761 | + out_of_memory("receive_xattr"); |
| 762 | + read_buf(f, ptr, name_len); |
| 763 | + read_buf(f, ptr + name_len, datum_len); |
| 764 | + rxa->name_len = name_len; |
| 765 | + rxa->datum_len = datum_len; |
| 766 | + rxa->name = ptr; |
| 767 | + rxa->datum = ptr + name_len; |
| 768 | + } |
| 769 | + ndx = rsync_xal_l.count; |
| 770 | + rsync_xal_store(&temp_xattr); |
| 771 | + } else if (tag == 'x') { |
| 772 | + ndx = read_int(f); |
| 773 | + if (ndx < 0 || (size_t)ndx >= rsync_xal_l.count) { |
| 774 | + rprintf(FERROR, "%s: receive_xattr: xa index %d out of range\n", |
| 775 | + f_name(file, NULL), ndx); |
| 776 | + exit_cleanup(RERR_STREAMIO); |
| 777 | + } |
| 778 | + } else { |
| 779 | + rprintf(FERROR, |
| 780 | + "%s: receive_xattr: unknown extended attribute type tag: %c\n", |
| 781 | + f_name(file, NULL), tag); |
| 782 | + exit_cleanup(RERR_STREAMIO); |
| 783 | + ndx = 0; /* silence a compiler warning... */ |
| 784 | + } |
| 785 | + |
| 786 | + SIVAL(ndx_ptr, 0, ndx); |
| 787 | +} |
| 788 | + |
| 789 | +/* Turn the xattr data in statx into cached xattr data, setting the index |
| 790 | + * values in the file struct. */ |
| 791 | +void cache_xattr(struct file_struct *file, statx *sxp) |
| 792 | +{ |
| 793 | + char *ndx_ptr = (char*)file + file_struct_len; |
| 794 | + int ndx; |
| 795 | + |
| 796 | + if (!sxp->xattr) |
| 797 | + return; |
| 798 | + |
| 799 | + ndx = find_matching_xattr(sxp->xattr); |
| 800 | + if (ndx == -1) |
| 801 | + rsync_xal_store(sxp->xattr); |
| 802 | + free_xattr(sxp); |
| 803 | + |
| 804 | + SIVAL(ndx_ptr, 0, ndx); |
| 805 | +} |
| 806 | + |
| 807 | +static int rsync_xal_set(const char *fname, item_list *xalp) |
| 808 | +{ |
| 809 | + rsync_xa *rxas = xalp->items; |
| 810 | + size_t i; |
| 811 | + int ret = 0; |
| 812 | + |
| 813 | + for (i = 0; i < xalp->count; i++) { |
| 814 | + int status = sys_lsetxattr(fname, rxas[i].name, rxas[i].datum, rxas[i].datum_len, 0); |
| 815 | + if (status < 0) { |
| 816 | + rsyserr(FERROR, errno, "%s: rsync_xal_set: lsetxattr %s failed", |
| 817 | + fname, rxas[i].name); |
| 818 | + ret = -1; |
| 819 | + } |
| 820 | + } |
| 821 | + return ret; |
| 822 | +} |
| 823 | + |
| 824 | +/* Set extended attributes on indicated filename. */ |
| 825 | +int set_xattr(const char *fname, const struct file_struct *file, UNUSED(statx *sxp)) |
| 826 | +{ |
| 827 | + int ndx; |
| 828 | + char *ndx_ptr = (char*)file + file_struct_len; |
| 829 | + item_list *lst = rsync_xal_l.items; |
| 830 | + |
| 831 | + if (dry_run) |
| 832 | + return 1; /* FIXME: --dry-run needs to compute this value */ |
| 833 | + |
| 834 | + ndx = IVAL(ndx_ptr, 0); |
| 835 | + return rsync_xal_set(fname, lst + ndx); /* TODO: This needs to return 1 if no xattrs changed! */ |
| 836 | +} |
| 837 | + |
| 838 | +#endif /* SUPPORT_XATTRS */ |