src/xattrs.c

   1 /* Support for extended attributes.
   2
   3    Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011, 2012 Free Software
   4    Foundation, Inc.
   5
   6    Written by James Antill, on 2006-07-27.
   7
   8    This program is free software; you can redistribute it and/or modify it
   9    under the terms of the GNU General Public License as published by the
  10    Free Software Foundation; either version 3, or (at your option) any later
  11    version.
  12
  13    This program is distributed in the hope that it will be useful, but
  14    WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General
  16    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, write to the Free Software Foundation, Inc.,
  20    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  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   int size;
  37   int 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 acl_t acl_get_file_at (int dirfd, const char *file, acl_type_t type);
  62 int acl_set_file_at (int dirfd, const char *file, acl_type_t type, acl_t acl);
  63 int file_has_acl_at (int dirfd, char const *, struct stat const *);
  64
  65 /* acl_get_file_at */
  66 #define AT_FUNC_NAME acl_get_file_at
  67 #define AT_FUNC_RESULT acl_t
  68 #define AT_FUNC_FAIL (acl_t)NULL
  69 #define AT_FUNC_F1 acl_get_file
  70 #define AT_FUNC_POST_FILE_PARAM_DECLS   , acl_type_t type
  71 #define AT_FUNC_POST_FILE_ARGS          , type
  72 #include "at-func.c"
  73 #undef AT_FUNC_NAME
  74 #undef AT_FUNC_F1
  75 #undef AT_FUNC_RESULT
  76 #undef AT_FUNC_FAIL
  77 #undef AT_FUNC_POST_FILE_PARAM_DECLS
  78 #undef AT_FUNC_POST_FILE_ARGS
  79
  80 /* acl_set_file_at */
  81 #define AT_FUNC_NAME acl_set_file_at
  82 #define AT_FUNC_F1 acl_set_file
  83 #define AT_FUNC_POST_FILE_PARAM_DECLS   , acl_type_t type, acl_t acl
  84 #define AT_FUNC_POST_FILE_ARGS          , type, acl
  85 #include "at-func.c"
  86 #undef AT_FUNC_NAME
  87 #undef AT_FUNC_F1
  88 #undef AT_FUNC_POST_FILE_PARAM_DECLS
  89 #undef AT_FUNC_POST_FILE_ARGS
  90
  91 /* gnulib file_has_acl_at */
  92 #define AT_FUNC_NAME file_has_acl_at
  93 #define AT_FUNC_F1 file_has_acl
  94 #define AT_FUNC_POST_FILE_PARAM_DECLS   , struct stat const *st
  95 #define AT_FUNC_POST_FILE_ARGS          , st
  96 #include "at-func.c"
  97 #undef AT_FUNC_NAME
  98 #undef AT_FUNC_F1
  99 #undef AT_FUNC_POST_FILE_PARAM_DECLS
 100 #undef AT_FUNC_POST_FILE_ARGS
 101
 102 /* convert unix permissions into an ACL ... needed due to "default" ACLs */
 103 static acl_t
 104 perms2acl (int perms)
 105 {
 106   char val[] = "user::---,group::---,other::---";
 107   /*            0123456789 123456789 123456789 123456789 */
 108
 109   /* user */
 110   if (perms & 0400)
 111     val[6] = 'r';
 112   if (perms & 0200)
 113     val[7] = 'w';
 114   if (perms & 0100)
 115     val[8] = 'x';
 116
 117   /* group */
 118   if (perms & 0040)
 119     val[17] = 'r';
 120   if (perms & 0020)
 121     val[18] = 'w';
 122   if (perms & 0010)
 123     val[19] = 'x';
 124
 125   /* other */
 126   if (perms & 0004)
 127     val[28] = 'r';
 128   if (perms & 0002)
 129     val[29] = 'w';
 130   if (perms & 0001)
 131     val[30] = 'x';
 132
 133   return acl_from_text (val);
 134 }
 135
 136 static char *
 137 skip_to_ext_fields (char *ptr)
 138 {
 139   ptr += strcspn (ptr, ":,\n"); /* skip tag name. Ie. user/group/default/mask */
 140
 141   if (*ptr != ':')
 142     return ptr;         /* error? no user/group field */
 143   ++ptr;
 144
 145   ptr += strcspn (ptr, ":,\n"); /* skip user/group name */
 146
 147   if (*ptr != ':')
 148     return ptr;         /* error? no perms field */
 149   ++ptr;
 150
 151   ptr += strcspn (ptr, ":,\n"); /* skip perms */
 152
 153   if (*ptr != ':')
 154     return ptr;         /* no extra fields */
 155
 156   return ptr;
 157 }
 158
 159 /* The POSIX draft allows extra fields after the three main ones. Star
 160    uses this to add a fourth field for user/group which is the numeric ID.
 161    We just skip all extra fields atm. */
 162 static const char *
 163 fixup_extra_acl_fields (const char *ptr)
 164 {
 165   char *src = (char *) ptr;
 166   char *dst = (char *) ptr;
 167
 168   while (*src)
 169     {
 170       const char *old = src;
 171       size_t len = 0;
 172
 173       src = skip_to_ext_fields (src);
 174       len = src - old;
 175       if (old != dst)
 176         memmove (dst, old, len);
 177       dst += len;
 178
 179       if (*src == ':')          /* We have extra fields, skip them all */
 180         src += strcspn (src, "\n,");
 181
 182       if ((*src == '\n') || (*src == ','))
 183         *dst++ = *src++;        /* also done when dst == src, but that's ok */
 184     }
 185   if (src != dst)
 186     *dst = 0;
 187
 188   return ptr;
 189 }
 190
 191 static void
 192 xattrs__acls_set (struct tar_stat_info const *st,
 193                   char const *file_name, int type,
 194                   const char *ptr, size_t len, bool def)
 195 {                               /* "system.posix_acl_access" */
 196   acl_t acl;
 197
 198   if (ptr)
 199     {
 200       /* assert (strlen (ptr) == len); */
 201       ptr = fixup_extra_acl_fields (ptr);
 202
 203       acl = acl_from_text (ptr);
 204       acls_option = 1;
 205     }
 206   else if (acls_option > 0)
 207     acl = perms2acl (st->stat.st_mode);
 208   else
 209     return;     /* don't call acl functions unless we first hit an ACL, or
 210                    --acls was passed explicitly */
 211
 212   if (acl == (acl_t) NULL)
 213     {
 214       call_arg_warn ("acl_from_text", file_name);
 215       return;
 216     }
 217
 218   if (acl_set_file_at (chdir_fd, file_name, type, acl) == -1)
 219     /* warn even if filesystem does not support acls */
 220     WARNOPT (WARN_XATTR_WRITE,
 221              (0, errno,
 222               _("acl_set_file_at: Cannot set POSIX ACLs for file '%s'"),
 223               file_name));
 224
 225   acl_free (acl);
 226 }
 227
 228 static void
 229 xattrs__acls_get_a (int parentfd, const char *file_name,
 230                     struct tar_stat_info *st,
 231                     char **ret_ptr, size_t * ret_len)
 232 { /* "system.posix_acl_access" */
 233   char *val = NULL;
 234   ssize_t len;
 235   acl_t acl;
 236
 237   if ((acl = acl_get_file_at (parentfd, file_name, ACL_TYPE_ACCESS))
 238       == (acl_t) NULL)
 239     {
 240       if (errno != ENOTSUP)
 241         call_arg_warn ("acl_get_file_at", file_name);
 242       return;
 243     }
 244
 245   val = acl_to_text (acl, &len);
 246   acl_free (acl);
 247
 248   if (val == NULL)
 249     {
 250       call_arg_warn ("acl_to_text", file_name);
 251       return;
 252     }
 253
 254   *ret_ptr = xstrdup (val);
 255   *ret_len = len;
 256
 257   acl_free (val);
 258 }
 259
 260 static void
 261 xattrs__acls_get_d (int parentfd, char const *file_name,
 262                     struct tar_stat_info *st,
 263                     char **ret_ptr, size_t * ret_len)
 264 {                               /* "system.posix_acl_default" */
 265   char *val = NULL;
 266   ssize_t len;
 267   acl_t acl;
 268
 269   if ((acl = acl_get_file_at (parentfd, file_name, ACL_TYPE_DEFAULT))
 270       == (acl_t) NULL)
 271     {
 272       if (errno != ENOTSUP)
 273         call_arg_warn ("acl_get_file_at", file_name);
 274       return;
 275     }
 276
 277   val = acl_to_text (acl, &len);
 278   acl_free (acl);
 279
 280   if (val == NULL)
 281     {
 282       call_arg_warn ("acl_to_text", file_name);
 283       return;
 284     }
 285
 286   *ret_ptr = xstrdup (val);
 287   *ret_len = len;
 288
 289   acl_free (val);
 290 }
 291 #endif /* HAVE_POSIX_ACLS */
 292
 293 static void
 294 acls_one_line (const char *prefix, char delim,
 295                const char *aclstring, size_t len)
 296 {
 297   /* support both long and short text representation of posix acls */
 298   struct obstack stk;
 299   obstack_init (&stk);
 300   int pref_len = strlen (prefix);
 301   const char *oldstring = aclstring;
 302
 303   if (!aclstring || !len)
 304     return;
 305
 306   int pos = 0;
 307   while (pos <= len)
 308     {
 309       int move = strcspn (aclstring, ",\n");
 310       if (!move)
 311         break;
 312
 313       if (oldstring != aclstring)
 314         obstack_1grow (&stk, delim);
 315
 316       obstack_grow (&stk, prefix, pref_len);
 317       obstack_grow (&stk, aclstring, move);
 318
 319       aclstring += move + 1;
 320     }
 321
 322   obstack_1grow (&stk, '\0');
 323   const char *toprint = obstack_finish (&stk);
 324
 325   fprintf (stdlis, "%s", toprint);
 326
 327   obstack_free (&stk, NULL);
 328 }
 329
 330 void
 331 xattrs_acls_get (int parentfd, char const *file_name,
 332                  struct tar_stat_info *st, int fd, int xisfile)
 333 {
 334   if (acls_option > 0)
 335     {
 336 #ifndef HAVE_POSIX_ACLS
 337       static int done = 0;
 338       if (!done)
 339         WARN ((0, 0, _("POSIX ACL support is not available")));
 340       done = 1;
 341 #else
 342       int err = file_has_acl_at (parentfd, file_name, &st->stat);
 343       if (err == 0)
 344         return;
 345       if (err == -1)
 346         {
 347           call_arg_warn ("file_has_acl_at", file_name);
 348           return;
 349         }
 350
 351       xattrs__acls_get_a (parentfd, file_name, st,
 352                           &st->acls_a_ptr, &st->acls_a_len);
 353       if (!xisfile)
 354         xattrs__acls_get_d (parentfd, file_name, st,
 355                             &st->acls_d_ptr, &st->acls_d_len);
 356 #endif
 357     }
 358 }
 359
 360 void
 361 xattrs_acls_set (struct tar_stat_info const *st,
 362                  char const *file_name, char typeflag)
 363 {
 364   if ((acls_option > 0) && (typeflag != SYMTYPE))
 365     {
 366 #ifndef HAVE_POSIX_ACLS
 367       static int done = 0;
 368       if (!done)
 369         WARN ((0, 0, _("POSIX ACL support is not available")));
 370       done = 1;
 371 #else
 372       xattrs__acls_set (st, file_name, ACL_TYPE_ACCESS,
 373                         st->acls_a_ptr, st->acls_a_len, false);
 374       if ((typeflag == DIRTYPE) || (typeflag == GNUTYPE_DUMPDIR))
 375         xattrs__acls_set (st, file_name, ACL_TYPE_DEFAULT,
 376                           st->acls_d_ptr, st->acls_d_len, true);
 377 #endif
 378     }
 379 }
 380
 381 static void
 382 mask_map_realloc (struct xattrs_mask_map *map)
 383 {
 384   if (map->size == 0)
 385     {
 386       map->size = 4;
 387       map->masks = xmalloc (16 * sizeof (char *));
 388       return;
 389     }
 390
 391   if (map->size <= map->used)
 392     {
 393       map->size *= 2;
 394       map->masks = xrealloc (map->masks, map->size * sizeof (char *));
 395       return;
 396     }
 397 }
 398
 399 void
 400 xattrs_mask_add (const char *mask, bool incl)
 401 {
 402   struct xattrs_mask_map *mask_map = incl ? &xattrs_setup.incl
 403     : &xattrs_setup.excl;
 404   /* ensure there is enough space */
 405   mask_map_realloc (mask_map);
 406   /* just assign pointers -- we silently expect that pointer "mask" is valid
 407      through the whole program (pointer to argv array) */
 408   mask_map->masks[mask_map->used++] = mask;
 409 }
 410
 411 static void
 412 clear_mask_map (struct xattrs_mask_map *mask_map)
 413 {
 414   if (mask_map->size)
 415     free (mask_map->masks);
 416 }
 417
 418 void
 419 xattrs_clear_setup ()
 420 {
 421   clear_mask_map (&xattrs_setup.incl);
 422   clear_mask_map (&xattrs_setup.excl);
 423 }
 424
 425 /* get all xattrs from file given by FILE_NAME or FD (when non-zero).  This
 426    includes all the user.*, security.*, system.*, etc. available domains */
 427 void
 428 xattrs_xattrs_get (int parentfd, char const *file_name,
 429                    struct tar_stat_info *st, int fd)
 430 {
 431   if (xattrs_option > 0)
 432     {
 433 #ifndef HAVE_XATTRS
 434       static int done = 0;
 435       if (!done)
 436         WARN ((0, 0, _("XATTR support is not available")));
 437       done = 1;
 438 #else
 439       static ssize_t xsz = 1024;
 440       static char *xatrs = NULL;
 441       ssize_t xret = -1;
 442
 443       if (!xatrs)
 444         xatrs = xmalloc (xsz);
 445
 446       while (((fd == 0) ?
 447               ((xret =
 448                 llistxattrat (parentfd, file_name, xatrs, xsz)) == -1) :
 449                 ((xret = flistxattr (fd, xatrs, xsz)) == -1))
 450              && (errno == ERANGE))
 451         {
 452           xsz <<= 1;
 453           xatrs = xrealloc (xatrs, xsz);
 454         }
 455
 456       if (xret == -1)
 457         call_arg_warn ((fd == 0) ? "llistxattrat" : "flistxattr", file_name);
 458       else
 459         {
 460           const char *attr = xatrs;
 461           static ssize_t asz = 1024;
 462           static char *val = NULL;
 463
 464           if (!val)
 465             val = xmalloc (asz);
 466
 467           while (xret > 0)
 468             {
 469               size_t len = strlen (attr);
 470               ssize_t aret = 0;
 471
 472               /* Archive all xattrs during creation, decide at extraction time
 473                * which ones are of interest/use for the target filesystem. */
 474               while (((fd == 0)
 475                       ? ((aret = lgetxattrat (parentfd, file_name, attr,
 476                                               val, asz)) == -1)
 477                       : ((aret = fgetxattr (fd, attr, val, asz)) == -1))
 478                      && (errno == ERANGE))
 479                 {
 480                   asz <<= 1;
 481                   val = xrealloc (val, asz);
 482                 }
 483
 484               if (aret != -1)
 485                 xheader_xattr_add (st, attr, val, aret);
 486               else if (errno != ENOATTR)
 487                 call_arg_warn ((fd == 0) ? "lgetxattrat"
 488                                : "fgetxattr", file_name);
 489
 490               attr += len + 1;
 491               xret -= len + 1;
 492             }
 493         }
 494 #endif
 495     }
 496 }
 497
 498 static void
 499 xattrs__fd_set (struct tar_stat_info const *st,
 500                 char const *file_name, char typeflag,
 501                 const char *attr, const char *ptr, size_t len)
 502 {
 503   if (ptr)
 504     {
 505       const char *sysname = "setxattrat";
 506       int ret = -1;
 507
 508       if (typeflag != SYMTYPE)
 509         ret = setxattrat (chdir_fd, file_name, attr, ptr, len, 0);
 510       else
 511         {
 512           sysname = "lsetxattr";
 513           ret = lsetxattrat (chdir_fd, file_name, attr, ptr, len, 0);
 514         }
 515
 516       if (ret == -1)
 517         WARNOPT (WARN_XATTR_WRITE,
 518                  (0, errno,
 519                   _("%s: Cannot set '%s' extended attribute for file '%s'"),
 520                   sysname, attr, file_name));
 521     }
 522 }
 523
 524 /* lgetfileconat is called against FILE_NAME iff the FD parameter is set to
 525    zero, otherwise the fgetfileconat is used against correct file descriptor */
 526 void
 527 xattrs_selinux_get (int parentfd, char const *file_name,
 528                     struct tar_stat_info *st, int fd)
 529 {
 530   if (selinux_context_option > 0)
 531     {
 532 #if HAVE_SELINUX_SELINUX_H != 1
 533       static int done = 0;
 534       if (!done)
 535         WARN ((0, 0, _("SELinux support is not available")));
 536       done = 1;
 537 #else
 538       int result = (fd ? fgetfilecon (fd, &st->cntx_name)
 539                     : lgetfileconat (parentfd, file_name, &st->cntx_name));
 540
 541       if (result == -1 && errno != ENODATA && errno != ENOTSUP)
 542         call_arg_warn (fd ? "fgetfilecon" : "lgetfileconat", file_name);
 543 #endif
 544     }
 545 }
 546
 547 void
 548 xattrs_selinux_set (struct tar_stat_info const *st,
 549                     char const *file_name, char typeflag)
 550 {
 551   if (selinux_context_option > 0)
 552     {
 553 #if HAVE_SELINUX_SELINUX_H != 1
 554       static int done = 0;
 555       if (!done)
 556         WARN ((0, 0, _("SELinux support is not available")));
 557       done = 1;
 558 #else
 559       const char *sysname = "setfilecon";
 560       int ret;
 561
 562       if (!st->cntx_name)
 563         return;
 564
 565       if (typeflag != SYMTYPE)
 566         {
 567           ret = setfileconat (chdir_fd, file_name, st->cntx_name);
 568           sysname = "setfileconat";
 569         }
 570       else
 571         {
 572           ret = lsetfileconat (chdir_fd, file_name, st->cntx_name);
 573           sysname = "lsetfileconat";
 574         }
 575
 576       if (ret == -1)
 577         WARNOPT (WARN_XATTR_WRITE,
 578                  (0, errno,
 579                   _("%s: Cannot set SELinux context for file '%s'"),
 580                   sysname, file_name));
 581 #endif
 582     }
 583 }
 584
 585 static bool
 586 xattrs_matches_mask (const char *kw, struct xattrs_mask_map *mm)
 587 {
 588   int i;
 589
 590   if (!mm->size)
 591     return false;
 592
 593   for (i = 0; i < mm->used; i++)
 594     if (fnmatch (mm->masks[i], kw, 0) == 0)
 595       return true;
 596
 597   return false;
 598 }
 599
 600 static bool
 601 xattrs_kw_included (const char *kw, bool archiving)
 602 {
 603   if (xattrs_setup.incl.size)
 604     return xattrs_matches_mask (kw, &xattrs_setup.incl);
 605   else
 606     {
 607       if (archiving)
 608         return true;
 609       else
 610         return strncmp (kw, "user.", strlen ("user.")) == 0;
 611     }
 612 }
 613
 614 static bool
 615 xattrs_kw_excluded (const char *kw, bool archiving)
 616 {
 617   if (!xattrs_setup.excl.size)
 618     return false;
 619
 620   return xattrs_matches_mask (kw, &xattrs_setup.excl);
 621 }
 622
 623 /* Check whether the xattr with keyword KW should be discarded from list of
 624    attributes that are going to be archived/excluded (set ARCHIVING=true for
 625    archiving, false for excluding) */
 626 static bool
 627 xattrs_masked_out (const char *kw, bool archiving)
 628 {
 629   if (!xattrs_kw_included (kw, archiving))
 630     return true;
 631
 632   return xattrs_kw_excluded (kw, archiving);
 633 }
 634
 635 void
 636 xattrs_xattrs_set (struct tar_stat_info const *st,
 637                    char const *file_name, char typeflag, int later_run)
 638 {
 639   if (xattrs_option > 0)
 640     {
 641 #ifndef HAVE_XATTRS
 642       static int done = 0;
 643       if (!done)
 644         WARN ((0, 0, _("XATTR support is not available")));
 645       done = 1;
 646 #else
 647       size_t scan = 0;
 648
 649       if (!st->xattr_map_size)
 650         return;
 651
 652       for (; scan < st->xattr_map_size; ++scan)
 653         {
 654           char *keyword = st->xattr_map[scan].xkey;
 655           keyword += strlen ("SCHILY.xattr.");
 656
 657           /* TODO: this 'later_run' workaround is temporary solution -> once
 658              capabilities should become fully supported by it's API and there
 659              should exist something like xattrs_capabilities_set() call.
 660              For a regular files: all extended attributes are restored during
 661              the first run except 'security.capability' which is restored in
 662              'later_run == 1'.  */
 663           if (typeflag == REGTYPE
 664               && later_run == !!strcmp (keyword, "security.capability"))
 665             continue;
 666
 667           if (xattrs_masked_out (keyword, false /* extracting */ ))
 668             /* we don't want to restore this keyword */
 669             continue;
 670
 671           xattrs__fd_set (st, file_name, typeflag, keyword,
 672                           st->xattr_map[scan].xval_ptr,
 673                           st->xattr_map[scan].xval_len);
 674         }
 675 #endif
 676     }
 677 }
 678
 679 void
 680 xattrs_print_char (struct tar_stat_info const *st, char *output)
 681 {
 682   int i;
 683
 684   if (verbose_option < 2)
 685     {
 686       *output = 0;
 687       return;
 688     }
 689
 690   if (xattrs_option > 0 || selinux_context_option > 0 || acls_option > 0)
 691     {
 692       /* placeholders */
 693       *output = ' ';
 694       *(output + 1) = 0;
 695     }
 696
 697   if (xattrs_option > 0 && st->xattr_map_size)
 698     for (i = 0; i < st->xattr_map_size; ++i)
 699       {
 700         char *keyword = st->xattr_map[i].xkey + strlen ("SCHILY.xattr.");
 701         if (xattrs_masked_out (keyword, false /* like extracting */ ))
 702           continue;
 703         *output = '*';
 704         break;
 705       }
 706
 707   if (selinux_context_option > 0 && st->cntx_name)
 708     *output = '.';
 709
 710   if (acls_option && (st->acls_a_len || st->acls_d_len))
 711     *output = '+';
 712 }
 713
 714 void
 715 xattrs_print (struct tar_stat_info const *st)
 716 {
 717   if (verbose_option < 3)
 718     return;
 719
 720   /* selinux */
 721   if (selinux_context_option && st->cntx_name)
 722     fprintf (stdlis, "  s: %s\n", st->cntx_name);
 723
 724   /* acls */
 725   if (acls_option && (st->acls_a_len || st->acls_d_len))
 726     {
 727       fprintf (stdlis, "  a: ");
 728       acls_one_line ("", ',', st->acls_a_ptr, st->acls_a_len);
 729       acls_one_line ("default:", ',', st->acls_d_ptr, st->acls_d_len);
 730       fprintf (stdlis, "\n");
 731     }
 732
 733   /* xattrs */
 734   if (xattrs_option && st->xattr_map_size)
 735     {
 736       int i;
 737       for (i = 0; i < st->xattr_map_size; ++i)
 738         {
 739           char *keyword = st->xattr_map[i].xkey + strlen ("SCHILY.xattr.");
 740           if (xattrs_masked_out (keyword, false /* like extracting */ ))
 741             continue;
 742           fprintf (stdlis, "  x: %lu %s\n",
 743                    (unsigned long) st->xattr_map[i].xval_len, keyword);
 744         }
 745     }
 746 }