Dogcows Code - chaz/tar/blob - src/xattrs.c

   1 /* Support for extended attributes.
   2
   3    Copyright (C) 2006-2014 Free Software Foundation, Inc.
   4
   5    This file is part of GNU tar.
   6
   7    GNU tar is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    GNU tar is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19
  20    Written by James Antill, on 2006-07-27.  */
  21
  22 #include <config.h>
  23 #include <system.h>
  24
  25 #include <fnmatch.h>
  26 #include <quotearg.h>
  27
  28 #include "common.h"
  29
  30 #include "xattr-at.h"
  31 #include "selinux-at.h"
  32
  33 struct xattrs_mask_map
  34 {
  35   const char **masks;
  36   size_t size;
  37   size_t used;
  38 };
  39
  40 /* list of fnmatch patterns */
  41 static struct
  42 {
  43   /* lists of fnmatch patterns */
  44   struct xattrs_mask_map incl;
  45   struct xattrs_mask_map excl;
  46 } xattrs_setup;
  47
  48 /* disable posix acls when problem found in gnulib script m4/acl.m4 */
  49 #if ! USE_ACL
  50 # undef HAVE_POSIX_ACLS
  51 #endif
  52
  53 #ifdef HAVE_POSIX_ACLS
  54 # include "acl.h"
  55 # include <sys/acl.h>
  56 #endif
  57
  58 #ifdef HAVE_POSIX_ACLS
  59
  60 /* acl-at wrappers, TODO: move to gnulib in future? */
  61 static acl_t acl_get_file_at (int, const char *, acl_type_t);
  62 static int acl_set_file_at (int, const char *, acl_type_t, acl_t);
  63 static int file_has_acl_at (int, char const *, struct stat const *);
  64 static int acl_delete_def_file_at (int, char const *);
  65
  66 /* acl_get_file_at */
  67 #define AT_FUNC_NAME acl_get_file_at
  68 #define AT_FUNC_RESULT acl_t
  69 #define AT_FUNC_FAIL (acl_t)NULL
  70 #define AT_FUNC_F1 acl_get_file
  71 #define AT_FUNC_POST_FILE_PARAM_DECLS   , acl_type_t type
  72 #define AT_FUNC_POST_FILE_ARGS          , type
  73 #include "at-func.c"
  74 #undef AT_FUNC_NAME
  75 #undef AT_FUNC_F1
  76 #undef AT_FUNC_RESULT
  77 #undef AT_FUNC_FAIL
  78 #undef AT_FUNC_POST_FILE_PARAM_DECLS
  79 #undef AT_FUNC_POST_FILE_ARGS
  80
  81 /* acl_set_file_at */
  82 #define AT_FUNC_NAME acl_set_file_at
  83 #define AT_FUNC_F1 acl_set_file
  84 #define AT_FUNC_POST_FILE_PARAM_DECLS   , acl_type_t type, acl_t acl
  85 #define AT_FUNC_POST_FILE_ARGS          , type, acl
  86 #include "at-func.c"
  87 #undef AT_FUNC_NAME
  88 #undef AT_FUNC_F1
  89 #undef AT_FUNC_POST_FILE_PARAM_DECLS
  90 #undef AT_FUNC_POST_FILE_ARGS
  91
  92 /* acl_delete_def_file_at */
  93 #define AT_FUNC_NAME acl_delete_def_file_at
  94 #define AT_FUNC_F1 acl_delete_def_file
  95 #define AT_FUNC_POST_FILE_PARAM_DECLS
  96 #define AT_FUNC_POST_FILE_ARGS
  97 #include "at-func.c"
  98 #undef AT_FUNC_NAME
  99 #undef AT_FUNC_F1
 100 #undef AT_FUNC_POST_FILE_PARAM_DECLS
 101 #undef AT_FUNC_POST_FILE_ARGS
 102
 103 /* gnulib file_has_acl_at */
 104 #define AT_FUNC_NAME file_has_acl_at
 105 #define AT_FUNC_F1 file_has_acl
 106 #define AT_FUNC_POST_FILE_PARAM_DECLS   , struct stat const *st
 107 #define AT_FUNC_POST_FILE_ARGS          , st
 108 #include "at-func.c"
 109 #undef AT_FUNC_NAME
 110 #undef AT_FUNC_F1
 111 #undef AT_FUNC_POST_FILE_PARAM_DECLS
 112 #undef AT_FUNC_POST_FILE_ARGS
 113
 114 /* convert unix permissions into an ACL ... needed due to "default" ACLs */
 115 static acl_t
 116 perms2acl (int perms)
 117 {
 118   char val[] = "user::---,group::---,other::---";
 119   /*            0123456789 123456789 123456789 123456789 */
 120
 121   /* user */
 122   if (perms & 0400)
 123     val[6] = 'r';
 124   if (perms & 0200)
 125     val[7] = 'w';
 126   if (perms & 0100)
 127     val[8] = 'x';
 128
 129   /* group */
 130   if (perms & 0040)
 131     val[17] = 'r';
 132   if (perms & 0020)
 133     val[18] = 'w';
 134   if (perms & 0010)
 135     val[19] = 'x';
 136
 137   /* other */
 138   if (perms & 0004)
 139     val[28] = 'r';
 140   if (perms & 0002)
 141     val[29] = 'w';
 142   if (perms & 0001)
 143     val[30] = 'x';
 144
 145   return acl_from_text (val);
 146 }
 147
 148 static char *
 149 skip_to_ext_fields (char *ptr)
 150 {
 151   /* skip tag name (user/group/default/mask) */
 152   ptr += strcspn (ptr, ":,\n");
 153
 154   if (*ptr != ':')
 155     return ptr;
 156   ++ptr;
 157
 158   ptr += strcspn (ptr, ":,\n"); /* skip user/group name */
 159
 160   if (*ptr != ':')
 161     return ptr;
 162   ++ptr;
 163
 164   ptr += strcspn (ptr, ":,\n"); /* skip perms */
 165
 166   return ptr;
 167 }
 168
 169 /* The POSIX draft allows extra fields after the three main ones. Star
 170    uses this to add a fourth field for user/group which is the numeric ID.
 171    This function removes such extra fields by overwriting them with the
 172    characters that follow. */
 173 static char *
 174 fixup_extra_acl_fields (char *ptr)
 175 {
 176   char *src = ptr;
 177   char *dst = ptr;
 178
 179   while (*src)
 180     {
 181       const char *old = src;
 182       size_t len = 0;
 183
 184       src = skip_to_ext_fields (src);
 185       len = src - old;
 186       if (old != dst)
 187         memmove (dst, old, len);
 188       dst += len;
 189
 190       if (*src == ':')          /* We have extra fields, skip them all */
 191         src += strcspn (src, "\n,");
 192
 193       if ((*src == '\n') || (*src == ','))
 194         *dst++ = *src++;        /* also done when dst == src, but that's ok */
 195     }
 196   if (src != dst)
 197     *dst = 0;
 198
 199   return ptr;
 200 }
 201
 202 /* Set the "system.posix_acl_access/system.posix_acl_default" extended
 203    attribute.  Called only when acls_option > 0. */
 204 static void
 205 xattrs__acls_set (struct tar_stat_info const *st,
 206                   char const *file_name, int type,
 207                   char *ptr, size_t len, bool def)
 208 {
 209   acl_t acl;
 210
 211   if (ptr)
 212     {
 213       /* assert (strlen (ptr) == len); */
 214       ptr = fixup_extra_acl_fields (ptr);
 215       acl = acl_from_text (ptr);
 216     }
 217   else if (def)
 218     {
 219       /* No "default" IEEE 1003.1e ACL set for directory.  At this moment,
 220          FILE_NAME may already have inherited default acls from parent
 221          directory;  clean them up. */
 222       if (acl_delete_def_file_at (chdir_fd, file_name))
 223         WARNOPT (WARN_XATTR_WRITE,
 224                 (0, errno,
 225                  _("acl_delete_def_file_at: Cannot drop default POSIX ACLs "
 226                    "for file '%s'"),
 227                  file_name));
 228       return;
 229     }
 230   else
 231     acl = perms2acl (st->stat.st_mode);
 232
 233   if (!acl)
 234     {
 235       call_arg_warn ("acl_from_text", file_name);
 236       return;
 237     }
 238
 239   if (acl_set_file_at (chdir_fd, file_name, type, acl) == -1)
 240     /* warn even if filesystem does not support acls */
 241     WARNOPT (WARN_XATTR_WRITE,
 242              (0, errno,
 243               _ ("acl_set_file_at: Cannot set POSIX ACLs for file '%s'"),
 244               file_name));
 245
 246   acl_free (acl);
 247 }
 248
 249 static void
 250 xattrs__acls_get_a (int parentfd, const char *file_name,
 251                     struct tar_stat_info *st,
 252                     char **ret_ptr, size_t * ret_len)
 253 {
 254   char *val = NULL;
 255   ssize_t len;
 256   acl_t acl;
 257
 258   if (!(acl = acl_get_file_at (parentfd, file_name, ACL_TYPE_ACCESS)))
 259     {
 260       if (errno != ENOTSUP)
 261         call_arg_warn ("acl_get_file_at", file_name);
 262       return;
 263     }
 264
 265   val = acl_to_text (acl, &len);
 266   acl_free (acl);
 267
 268   if (!val)
 269     {
 270       call_arg_warn ("acl_to_text", file_name);
 271       return;
 272     }
 273
 274   *ret_ptr = xstrdup (val);
 275   *ret_len = len;
 276
 277   acl_free (val);
 278 }
 279
 280 /* "system.posix_acl_default" */
 281 static void
 282 xattrs__acls_get_d (int parentfd, char const *file_name,
 283                     struct tar_stat_info *st,
 284                     char **ret_ptr, size_t * ret_len)
 285 {
 286   char *val = NULL;
 287   ssize_t len;
 288   acl_t acl;
 289
 290   if (!(acl = acl_get_file_at (parentfd, file_name, ACL_TYPE_DEFAULT)))
 291     {
 292       if (errno != ENOTSUP)
 293         call_arg_warn ("acl_get_file_at", file_name);
 294       return;
 295     }
 296
 297   val = acl_to_text (acl, &len);
 298   acl_free (acl);
 299
 300   if (!val)
 301     {
 302       call_arg_warn ("acl_to_text", file_name);
 303       return;
 304     }
 305
 306   *ret_ptr = xstrdup (val);
 307   *ret_len = len;
 308
 309   acl_free (val);
 310 }
 311 #endif /* HAVE_POSIX_ACLS */
 312
 313 static void
 314 acls_one_line (const char *prefix, char delim,
 315                const char *aclstring, size_t len)
 316 {
 317   /* support both long and short text representation of posix acls */
 318   struct obstack stk;
 319   int pref_len = strlen (prefix);
 320   const char *oldstring = aclstring;
 321   int pos = 0;
 322
 323   if (!aclstring || !len)
 324     return;
 325
 326   obstack_init (&stk);
 327   while (pos <= len)
 328     {
 329       int move = strcspn (aclstring, ",\n");
 330       if (!move)
 331         break;
 332
 333       if (oldstring != aclstring)
 334         obstack_1grow (&stk, delim);
 335
 336       obstack_grow (&stk, prefix, pref_len);
 337       obstack_grow (&stk, aclstring, move);
 338
 339       aclstring += move + 1;
 340     }
 341
 342   obstack_1grow (&stk, '\0');
 343
 344   fprintf (stdlis, "%s", (char *) obstack_finish (&stk));
 345
 346   obstack_free (&stk, NULL);
 347 }
 348
 349 void
 350 xattrs_acls_get (int parentfd, char const *file_name,
 351                  struct tar_stat_info *st, int fd, int xisfile)
 352 {
 353   if (acls_option > 0)
 354     {
 355 #ifndef HAVE_POSIX_ACLS
 356       static int done = 0;
 357       if (!done)
 358         WARN ((0, 0, _("POSIX ACL support is not available")));
 359       done = 1;
 360 #else
 361       int err = file_has_acl_at (parentfd, file_name, &st->stat);
 362       if (err == 0)
 363         return;
 364       if (err == -1)
 365         {
 366           call_arg_warn ("file_has_acl_at", file_name);
 367           return;
 368         }
 369
 370       xattrs__acls_get_a (parentfd, file_name, st,
 371                           &st->acls_a_ptr, &st->acls_a_len);
 372       if (!xisfile)
 373         xattrs__acls_get_d (parentfd, file_name, st,
 374                             &st->acls_d_ptr, &st->acls_d_len);
 375 #endif
 376     }
 377 }
 378
 379 void
 380 xattrs_acls_set (struct tar_stat_info const *st,
 381                  char const *file_name, char typeflag)
 382 {
 383   if (acls_option > 0 && typeflag != SYMTYPE)
 384     {
 385 #ifndef HAVE_POSIX_ACLS
 386       static int done = 0;
 387       if (!done)
 388         WARN ((0, 0, _("POSIX ACL support is not available")));
 389       done = 1;
 390 #else
 391       xattrs__acls_set (st, file_name, ACL_TYPE_ACCESS,
 392                         st->acls_a_ptr, st->acls_a_len, false);
 393       if (typeflag == DIRTYPE || typeflag == GNUTYPE_DUMPDIR)
 394         xattrs__acls_set (st, file_name, ACL_TYPE_DEFAULT,
 395                           st->acls_d_ptr, st->acls_d_len, true);
 396 #endif
 397     }
 398 }
 399
 400 static void
 401 mask_map_realloc (struct xattrs_mask_map *map)
 402 {
 403   if (map->used == map->size)
 404     {
 405       if (map->size == 0)
 406         map->size = 4;
 407       map->masks = x2nrealloc (map->masks, &map->size, sizeof (map->masks[0]));
 408     }
 409 }
 410
 411 void
 412 xattrs_mask_add (const char *mask, bool incl)
 413 {
 414   struct xattrs_mask_map *mask_map =
 415     incl ? &xattrs_setup.incl : &xattrs_setup.excl;
 416   /* ensure there is enough space */
 417   mask_map_realloc (mask_map);
 418   /* just assign pointers -- we silently expect that pointer "mask" is valid
 419      through the whole program (pointer to argv array) */
 420   mask_map->masks[mask_map->used++] = mask;
 421 }
 422
 423 static void
 424 clear_mask_map (struct xattrs_mask_map *mask_map)
 425 {
 426   if (mask_map->size)
 427     free (mask_map->masks);
 428 }
 429
 430 void
 431 xattrs_clear_setup (void)
 432 {
 433   clear_mask_map (&xattrs_setup.incl);
 434   clear_mask_map (&xattrs_setup.excl);
 435 }
 436
 437 /* get all xattrs from file given by FILE_NAME or FD (when non-zero).  This
 438    includes all the user.*, security.*, system.*, etc. available domains */
 439 void
 440 xattrs_xattrs_get (int parentfd, char const *file_name,
 441                    struct tar_stat_info *st, int fd)
 442 {
 443   if (xattrs_option > 0)
 444     {
 445 #ifndef HAVE_XATTRS
 446       static int done = 0;
 447       if (!done)
 448         WARN ((0, 0, _("XATTR support is not available")));
 449       done = 1;
 450 #else
 451       static size_t xsz = 1024;
 452       static char *xatrs = NULL;
 453       ssize_t xret = -1;
 454
 455       if (!xatrs)
 456         xatrs = x2nrealloc (xatrs, &xsz, 1);
 457
 458       while (((fd == 0) ?
 459               ((xret =
 460                 llistxattrat (parentfd, file_name, xatrs, xsz)) == -1) :
 461               ((xret = flistxattr (fd, xatrs, xsz)) == -1))
 462              && (errno == ERANGE))
 463         {
 464           xatrs = x2nrealloc (xatrs, &xsz, 1);
 465         }
 466
 467       if (xret == -1)
 468         call_arg_warn ((fd == 0) ? "llistxattrat" : "flistxattr", file_name);
 469       else
 470         {
 471           const char *attr = xatrs;
 472           static size_t asz = 1024;
 473           static char *val = NULL;
 474
 475           if (!val)
 476             val = x2nrealloc (val, &asz, 1);
 477
 478           while (xret > 0)
 479             {
 480               size_t len = strlen (attr);
 481               ssize_t aret = 0;
 482
 483               /* Archive all xattrs during creation, decide at extraction time
 484                * which ones are of interest/use for the target filesystem. */
 485               while (((fd == 0)
 486                       ? ((aret = lgetxattrat (parentfd, file_name, attr,
 487                                               val, asz)) == -1)
 488                       : ((aret = fgetxattr (fd, attr, val, asz)) == -1))
 489                      && (errno == ERANGE))
 490                 {
 491                   val = x2nrealloc (val, &asz, 1);
 492                 }
 493
 494               if (aret != -1)
 495                 xheader_xattr_add (st, attr, val, aret);
 496               else if (errno != ENOATTR)
 497                 call_arg_warn ((fd == 0) ? "lgetxattrat"
 498                                : "fgetxattr", file_name);
 499
 500               attr += len + 1;
 501               xret -= len + 1;
 502             }
 503         }
 504 #endif
 505     }
 506 }
 507
 508 #ifdef HAVE_XATTRS
 509 static void
 510 xattrs__fd_set (struct tar_stat_info const *st,
 511                 char const *file_name, char typeflag,
 512                 const char *attr, const char *ptr, size_t len)
 513 {
 514   if (ptr)
 515     {
 516       const char *sysname = "setxattrat";
 517       int ret = -1;
 518
 519       if (typeflag != SYMTYPE)
 520         ret = setxattrat (chdir_fd, file_name, attr, ptr, len, 0);
 521       else
 522         {
 523           sysname = "lsetxattr";
 524           ret = lsetxattrat (chdir_fd, file_name, attr, ptr, len, 0);
 525         }
 526
 527       if (ret == -1)
 528         WARNOPT (WARN_XATTR_WRITE,
 529                  (0, errno,
 530                   _("%s: Cannot set '%s' extended attribute for file '%s'"),
 531                   sysname, attr, file_name));
 532     }
 533 }
 534 #endif
 535
 536 /* lgetfileconat is called against FILE_NAME iff the FD parameter is set to
 537    zero, otherwise the fgetfileconat is used against correct file descriptor */
 538 void
 539 xattrs_selinux_get (int parentfd, char const *file_name,
 540                     struct tar_stat_info *st, int fd)
 541 {
 542   if (selinux_context_option > 0)
 543     {
 544 #if HAVE_SELINUX_SELINUX_H != 1
 545       static int done = 0;
 546       if (!done)
 547         WARN ((0, 0, _("SELinux support is not available")));
 548       done = 1;
 549 #else
 550       int result = fd ?
 551                     fgetfilecon (fd, &st->cntx_name)
 552                     : lgetfileconat (parentfd, file_name, &st->cntx_name);
 553
 554       if (result == -1 && errno != ENODATA && errno != ENOTSUP)
 555         call_arg_warn (fd ? "fgetfilecon" : "lgetfileconat", file_name);
 556 #endif
 557     }
 558 }
 559
 560 void
 561 xattrs_selinux_set (struct tar_stat_info const *st,
 562                     char const *file_name, char typeflag)
 563 {
 564   if (selinux_context_option > 0)
 565     {
 566 #if HAVE_SELINUX_SELINUX_H != 1
 567       static int done = 0;
 568       if (!done)
 569         WARN ((0, 0, _("SELinux support is not available")));
 570       done = 1;
 571 #else
 572       const char *sysname = "setfilecon";
 573       int ret;
 574
 575       if (!st->cntx_name)
 576         return;
 577
 578       if (typeflag != SYMTYPE)
 579         {
 580           ret = setfileconat (chdir_fd, file_name, st->cntx_name);
 581           sysname = "setfileconat";
 582         }
 583       else
 584         {
 585           ret = lsetfileconat (chdir_fd, file_name, st->cntx_name);
 586           sysname = "lsetfileconat";
 587         }
 588
 589       if (ret == -1)
 590         WARNOPT (WARN_XATTR_WRITE,
 591                  (0, errno,
 592                   _("%s: Cannot set SELinux context for file '%s'"),
 593                   sysname, file_name));
 594 #endif
 595     }
 596 }
 597
 598 static bool
 599 xattrs_matches_mask (const char *kw, struct xattrs_mask_map *mm)
 600 {
 601   int i;
 602
 603   if (!mm->size)
 604     return false;
 605
 606   for (i = 0; i < mm->used; i++)
 607     if (fnmatch (mm->masks[i], kw, 0) == 0)
 608       return true;
 609
 610   return false;
 611 }
 612
 613 #define USER_DOT_PFX "user."
 614
 615 static bool
 616 xattrs_kw_included (const char *kw, bool archiving)
 617 {
 618   if (xattrs_setup.incl.size)
 619     return xattrs_matches_mask (kw, &xattrs_setup.incl);
 620   else if (archiving)
 621     return true;
 622   else
 623     return strncmp (kw, USER_DOT_PFX, sizeof (USER_DOT_PFX) - 1) == 0;
 624 }
 625
 626 static bool
 627 xattrs_kw_excluded (const char *kw, bool archiving)
 628 {
 629   return xattrs_setup.excl.size ?
 630     xattrs_matches_mask (kw, &xattrs_setup.excl) : false;
 631 }
 632
 633 /* Check whether the xattr with keyword KW should be discarded from list of
 634    attributes that are going to be archived/excluded (set ARCHIVING=true for
 635    archiving, false for excluding) */
 636 static bool
 637 xattrs_masked_out (const char *kw, bool archiving)
 638 {
 639   return xattrs_kw_included (kw, archiving) ?
 640     xattrs_kw_excluded (kw, archiving) : true;
 641 }
 642
 643 void
 644 xattrs_xattrs_set (struct tar_stat_info const *st,
 645                    char const *file_name, char typeflag, int later_run)
 646 {
 647   if (xattrs_option > 0)
 648     {
 649 #ifndef HAVE_XATTRS
 650       static int done = 0;
 651       if (!done)
 652         WARN ((0, 0, _("XATTR support is not available")));
 653       done = 1;
 654 #else
 655       size_t scan = 0;
 656
 657       if (!st->xattr_map_size)
 658         return;
 659
 660       for (; scan < st->xattr_map_size; ++scan)
 661         {
 662           char *keyword = st->xattr_map[scan].xkey;
 663           keyword += strlen ("SCHILY.xattr.");
 664
 665           /* TODO: this 'later_run' workaround is temporary solution -> once
 666              capabilities should become fully supported by it's API and there
 667              should exist something like xattrs_capabilities_set() call.
 668              For a regular files: all extended attributes are restored during
 669              the first run except 'security.capability' which is restored in
 670              'later_run == 1'.  */
 671           if (typeflag == REGTYPE
 672               && later_run == !!strcmp (keyword, "security.capability"))
 673             continue;
 674
 675           if (xattrs_masked_out (keyword, false /* extracting */ ))
 676             /* we don't want to restore this keyword */
 677             continue;
 678
 679           xattrs__fd_set (st, file_name, typeflag, keyword,
 680                           st->xattr_map[scan].xval_ptr,
 681                           st->xattr_map[scan].xval_len);
 682         }
 683 #endif
 684     }
 685 }
 686
 687 void
 688 xattrs_print_char (struct tar_stat_info const *st, char *output)
 689 {
 690   int i;
 691
 692   if (verbose_option < 2)
 693     {
 694       *output = 0;
 695       return;
 696     }
 697
 698   if (xattrs_option > 0 || selinux_context_option > 0 || acls_option > 0)
 699     {
 700       /* placeholders */
 701       *output = ' ';
 702       output[1] = 0;
 703     }
 704
 705   if (xattrs_option > 0 && st->xattr_map_size)
 706     for (i = 0; i < st->xattr_map_size; ++i)
 707       {
 708         char *keyword = st->xattr_map[i].xkey + strlen ("SCHILY.xattr.");
 709         if (!xattrs_masked_out (keyword, false /* like extracting */ ))
 710           {
 711             *output = '*';
 712             break;
 713           }
 714       }
 715
 716   if (selinux_context_option > 0 && st->cntx_name)
 717     *output = '.';
 718
 719   if (acls_option > 0 && (st->acls_a_len || st->acls_d_len))
 720     *output = '+';
 721 }
 722
 723 void
 724 xattrs_print (struct tar_stat_info const *st)
 725 {
 726   if (verbose_option < 3)
 727     return;
 728
 729   /* selinux */
 730   if (selinux_context_option > 0 && st->cntx_name)
 731     fprintf (stdlis, "  s: %s\n", st->cntx_name);
 732
 733   /* acls */
 734   if (acls_option > 0 && (st->acls_a_len || st->acls_d_len))
 735     {
 736       fprintf (stdlis, "  a: ");
 737       acls_one_line ("", ',', st->acls_a_ptr, st->acls_a_len);
 738       acls_one_line ("default:", ',', st->acls_d_ptr, st->acls_d_len);
 739       fprintf (stdlis, "\n");
 740     }
 741
 742   /* xattrs */
 743   if (xattrs_option > 0 && st->xattr_map_size)
 744     {
 745       int i;
 746
 747       for (i = 0; i < st->xattr_map_size; ++i)
 748         {
 749           char *keyword = st->xattr_map[i].xkey + strlen ("SCHILY.xattr.");
 750           if (!xattrs_masked_out (keyword, false /* like extracting */ ))
 751             fprintf (stdlis, "  x: %lu %s\n",
 752                      (unsigned long) st->xattr_map[i].xval_len, keyword);
 753         }
 754     }
 755 }