contrib/libarchive/libarchive/archive_write_set_format_shar.c

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * Copyright (c) 2008 Joerg Sonnenberger
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  *
  15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
  16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  18  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
  19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  22  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  25  */
  26
  27 #include "archive_platform.h"
  28 __FBSDID("$FreeBSD$");
  29
  30 #ifdef HAVE_ERRNO_H
  31 #include <errno.h>
  32 #endif
  33 #include <stdio.h>
  34 #ifdef HAVE_STDLIB_H
  35 #include <stdlib.h>
  36 #endif
  37 #ifdef HAVE_STRING_H
  38 #include <string.h>
  39 #endif
  40
  41 #include "archive.h"
  42 #include "archive_entry.h"
  43 #include "archive_private.h"
  44 #include "archive_write_private.h"
  45
  46 struct shar {
  47         int                      dump;
  48         int                      end_of_line;
  49         struct archive_entry    *entry;
  50         int                      has_data;
  51         char                    *last_dir;
  52
  53         /* Line buffer for uuencoded dump format */
  54         char                     outbuff[45];
  55         size_t                   outpos;
  56
  57         int                      wrote_header;
  58         struct archive_string    work;
  59         struct archive_string    quoted_name;
  60 };
  61
  62 static int      archive_write_shar_close(struct archive_write *);
  63 static int      archive_write_shar_free(struct archive_write *);
  64 static int      archive_write_shar_header(struct archive_write *,
  65                     struct archive_entry *);
  66 static ssize_t  archive_write_shar_data_sed(struct archive_write *,
  67                     const void * buff, size_t);
  68 static ssize_t  archive_write_shar_data_uuencode(struct archive_write *,
  69                     const void * buff, size_t);
  70 static int      archive_write_shar_finish_entry(struct archive_write *);
  71
  72 /*
  73  * Copy the given string to the buffer, quoting all shell meta characters
  74  * found.
  75  */
  76 static void
  77 shar_quote(struct archive_string *buf, const char *str, int in_shell)
  78 {
  79         static const char meta[] = "\n \t'`\";&<>()|*?{}[]\\$!#^~";
  80         size_t len;
  81
  82         while (*str != '\0') {
  83                 if ((len = strcspn(str, meta)) != 0) {
  84                         archive_strncat(buf, str, len);
  85                         str += len;
  86                 } else if (*str == '\n') {
  87                         if (in_shell)
  88                                 archive_strcat(buf, "\"\n\"");
  89                         else
  90                                 archive_strcat(buf, "\\n");
  91                         ++str;
  92                 } else {
  93                         archive_strappend_char(buf, '\\');
  94                         archive_strappend_char(buf, *str);
  95                         ++str;
  96                 }
  97         }
  98 }
  99
 100 /*
 101  * Set output format to 'shar' format.
 102  */
 103 int
 104 archive_write_set_format_shar(struct archive *_a)
 105 {
 106         struct archive_write *a = (struct archive_write *)_a;
 107         struct shar *shar;
 108
 109         archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
 110             ARCHIVE_STATE_NEW, "archive_write_set_format_shar");
 111
 112         /* If someone else was already registered, unregister them. */
 113         if (a->format_free != NULL)
 114                 (a->format_free)(a);
 115
 116         shar = (struct shar *)calloc(1, sizeof(*shar));
 117         if (shar == NULL) {
 118                 archive_set_error(&a->archive, ENOMEM, "Can't allocate shar data");
 119                 return (ARCHIVE_FATAL);
 120         }
 121         archive_string_init(&shar->work);
 122         archive_string_init(&shar->quoted_name);
 123         a->format_data = shar;
 124         a->format_name = "shar";
 125         a->format_write_header = archive_write_shar_header;
 126         a->format_close = archive_write_shar_close;
 127         a->format_free = archive_write_shar_free;
 128         a->format_write_data = archive_write_shar_data_sed;
 129         a->format_finish_entry = archive_write_shar_finish_entry;
 130         a->archive.archive_format = ARCHIVE_FORMAT_SHAR_BASE;
 131         a->archive.archive_format_name = "shar";
 132         return (ARCHIVE_OK);
 133 }
 134
 135 /*
 136  * An alternate 'shar' that uses uudecode instead of 'sed' to encode
 137  * file contents and can therefore be used to archive binary files.
 138  * In addition, this variant also attempts to restore ownership, file modes,
 139  * and other extended file information.
 140  */
 141 int
 142 archive_write_set_format_shar_dump(struct archive *_a)
 143 {
 144         struct archive_write *a = (struct archive_write *)_a;
 145         struct shar *shar;
 146
 147         archive_write_set_format_shar(&a->archive);
 148         shar = (struct shar *)a->format_data;
 149         shar->dump = 1;
 150         a->format_write_data = archive_write_shar_data_uuencode;
 151         a->archive.archive_format = ARCHIVE_FORMAT_SHAR_DUMP;
 152         a->archive.archive_format_name = "shar dump";
 153         return (ARCHIVE_OK);
 154 }
 155
 156 static int
 157 archive_write_shar_header(struct archive_write *a, struct archive_entry *entry)
 158 {
 159         const char *linkname;
 160         const char *name;
 161         char *p, *pp;
 162         struct shar *shar;
 163
 164         shar = (struct shar *)a->format_data;
 165         if (!shar->wrote_header) {
 166                 archive_strcat(&shar->work, "#!/bin/sh\n");
 167                 archive_strcat(&shar->work, "# This is a shell archive\n");
 168                 shar->wrote_header = 1;
 169         }
 170
 171         /* Save the entry for the closing. */
 172         if (shar->entry)
 173                 archive_entry_free(shar->entry);
 174         shar->entry = archive_entry_clone(entry);
 175         name = archive_entry_pathname(entry);
 176
 177         /* Handle some preparatory issues. */
 178         switch(archive_entry_filetype(entry)) {
 179         case AE_IFREG:
 180                 /* Only regular files have non-zero size. */
 181                 break;
 182         case AE_IFDIR:
 183                 archive_entry_set_size(entry, 0);
 184                 /* Don't bother trying to recreate '.' */
 185                 if (strcmp(name, ".") == 0  ||  strcmp(name, "./") == 0)
 186                         return (ARCHIVE_OK);
 187                 break;
 188         case AE_IFIFO:
 189         case AE_IFCHR:
 190         case AE_IFBLK:
 191                 /* All other file types have zero size in the archive. */
 192                 archive_entry_set_size(entry, 0);
 193                 break;
 194         default:
 195                 archive_entry_set_size(entry, 0);
 196                 if (archive_entry_hardlink(entry) == NULL &&
 197                     archive_entry_symlink(entry) == NULL) {
 198                         archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
 199                             "shar format cannot archive this");
 200                         return (ARCHIVE_WARN);
 201                 }
 202         }
 203
 204         archive_string_empty(&shar->quoted_name);
 205         shar_quote(&shar->quoted_name, name, 1);
 206
 207         /* Stock preparation for all file types. */
 208         archive_string_sprintf(&shar->work, "echo x %s\n", shar->quoted_name.s);
 209
 210         if (archive_entry_filetype(entry) != AE_IFDIR) {
 211                 /* Try to create the dir. */
 212                 p = strdup(name);
 213                 pp = strrchr(p, '/');
 214                 /* If there is a / character, try to create the dir. */
 215                 if (pp != NULL) {
 216                         *pp = '\0';
 217
 218                         /* Try to avoid a lot of redundant mkdir commands. */
 219                         if (strcmp(p, ".") == 0) {
 220                                 /* Don't try to "mkdir ." */
 221                                 free(p);
 222                         } else if (shar->last_dir == NULL) {
 223                                 archive_strcat(&shar->work, "mkdir -p ");
 224                                 shar_quote(&shar->work, p, 1);
 225                                 archive_strcat(&shar->work,
 226                                     " > /dev/null 2>&1\n");
 227                                 shar->last_dir = p;
 228                         } else if (strcmp(p, shar->last_dir) == 0) {
 229                                 /* We've already created this exact dir. */
 230                                 free(p);
 231                         } else if (strlen(p) < strlen(shar->last_dir) &&
 232                             strncmp(p, shar->last_dir, strlen(p)) == 0) {
 233                                 /* We've already created a subdir. */
 234                                 free(p);
 235                         } else {
 236                                 archive_strcat(&shar->work, "mkdir -p ");
 237                                 shar_quote(&shar->work, p, 1);
 238                                 archive_strcat(&shar->work,
 239                                     " > /dev/null 2>&1\n");
 240                                 shar->last_dir = p;
 241                         }
 242                 } else {
 243                         free(p);
 244                 }
 245         }
 246
 247         /* Handle file-type specific issues. */
 248         shar->has_data = 0;
 249         if ((linkname = archive_entry_hardlink(entry)) != NULL) {
 250                 archive_strcat(&shar->work, "ln -f ");
 251                 shar_quote(&shar->work, linkname, 1);
 252                 archive_string_sprintf(&shar->work, " %s\n",
 253                     shar->quoted_name.s);
 254         } else if ((linkname = archive_entry_symlink(entry)) != NULL) {
 255                 archive_strcat(&shar->work, "ln -fs ");
 256                 shar_quote(&shar->work, linkname, 1);
 257                 archive_string_sprintf(&shar->work, " %s\n",
 258                     shar->quoted_name.s);
 259         } else {
 260                 switch(archive_entry_filetype(entry)) {
 261                 case AE_IFREG:
 262                         if (archive_entry_size(entry) == 0) {
 263                                 /* More portable than "touch." */
 264                                 archive_string_sprintf(&shar->work,
 265                                     "test -e \"%s\" || :> \"%s\"\n",
 266                                     shar->quoted_name.s, shar->quoted_name.s);
 267                         } else {
 268                                 if (shar->dump) {
 269                                         unsigned int mode = archive_entry_mode(entry) & 0777;
 270                                         archive_string_sprintf(&shar->work,
 271                                             "uudecode -p > %s << 'SHAR_END'\n",
 272                                             shar->quoted_name.s);
 273                                         archive_string_sprintf(&shar->work,
 274                                             "begin %o ", mode);
 275                                         shar_quote(&shar->work, name, 0);
 276                                         archive_strcat(&shar->work, "\n");
 277                                 } else {
 278                                         archive_string_sprintf(&shar->work,
 279                                             "sed 's/^X//' > %s << 'SHAR_END'\n",
 280                                             shar->quoted_name.s);
 281                                 }
 282                                 shar->has_data = 1;
 283                                 shar->end_of_line = 1;
 284                                 shar->outpos = 0;
 285                         }
 286                         break;
 287                 case AE_IFDIR:
 288                         archive_string_sprintf(&shar->work,
 289                             "mkdir -p %s > /dev/null 2>&1\n",
 290                             shar->quoted_name.s);
 291                         /* Record that we just created this directory. */
 292                         if (shar->last_dir != NULL)
 293                                 free(shar->last_dir);
 294
 295                         shar->last_dir = strdup(name);
 296                         /* Trim a trailing '/'. */
 297                         pp = strrchr(shar->last_dir, '/');
 298                         if (pp != NULL && pp[1] == '\0')
 299                                 *pp = '\0';
 300                         /*
 301                          * TODO: Put dir name/mode on a list to be fixed
 302                          * up at end of archive.
 303                          */
 304                         break;
 305                 case AE_IFIFO:
 306                         archive_string_sprintf(&shar->work,
 307                             "mkfifo %s\n", shar->quoted_name.s);
 308                         break;
 309                 case AE_IFCHR:
 310                         archive_string_sprintf(&shar->work,
 311                             "mknod %s c %ju %ju\n", shar->quoted_name.s,
 312                             (uintmax_t)archive_entry_rdevmajor(entry),
 313                             (uintmax_t)archive_entry_rdevminor(entry));
 314                         break;
 315                 case AE_IFBLK:
 316                         archive_string_sprintf(&shar->work,
 317                             "mknod %s b %ju %ju\n", shar->quoted_name.s,
 318                             (uintmax_t)archive_entry_rdevmajor(entry),
 319                             (uintmax_t)archive_entry_rdevminor(entry));
 320                         break;
 321                 default:
 322                         return (ARCHIVE_WARN);
 323                 }
 324         }
 325
 326         return (ARCHIVE_OK);
 327 }
 328
 329 static ssize_t
 330 archive_write_shar_data_sed(struct archive_write *a, const void *buff, size_t n)
 331 {
 332         static const size_t ensured = 65533;
 333         struct shar *shar;
 334         const char *src;
 335         char *buf, *buf_end;
 336         int ret;
 337         size_t written = n;
 338
 339         shar = (struct shar *)a->format_data;
 340         if (!shar->has_data || n == 0)
 341                 return (0);
 342
 343         src = (const char *)buff;
 344
 345         /*
 346          * ensure is the number of bytes in buffer before expanding the
 347          * current character.  Each operation writes the current character
 348          * and optionally the start-of-new-line marker.  This can happen
 349          * twice before entering the loop, so make sure three additional
 350          * bytes can be written.
 351          */
 352         if (archive_string_ensure(&shar->work, ensured + 3) == NULL) {
 353                 archive_set_error(&a->archive, ENOMEM, "Out of memory");
 354                 return (ARCHIVE_FATAL);
 355         }
 356
 357         if (shar->work.length > ensured) {
 358                 ret = __archive_write_output(a, shar->work.s,
 359                     shar->work.length);
 360                 if (ret != ARCHIVE_OK)
 361                         return (ARCHIVE_FATAL);
 362                 archive_string_empty(&shar->work);
 363         }
 364         buf = shar->work.s + shar->work.length;
 365         buf_end = shar->work.s + ensured;
 366
 367         if (shar->end_of_line) {
 368                 *buf++ = 'X';
 369                 shar->end_of_line = 0;
 370         }
 371
 372         while (n-- != 0) {
 373                 if ((*buf++ = *src++) == '\n') {
 374                         if (n == 0)
 375                                 shar->end_of_line = 1;
 376                         else
 377                                 *buf++ = 'X';
 378                 }
 379
 380                 if (buf >= buf_end) {
 381                         shar->work.length = buf - shar->work.s;
 382                         ret = __archive_write_output(a, shar->work.s,
 383                             shar->work.length);
 384                         if (ret != ARCHIVE_OK)
 385                                 return (ARCHIVE_FATAL);
 386                         archive_string_empty(&shar->work);
 387                         buf = shar->work.s;
 388                 }
 389         }
 390
 391         shar->work.length = buf - shar->work.s;
 392
 393         return (written);
 394 }
 395
 396 #define UUENC(c)        (((c)!=0) ? ((c) & 077) + ' ': '`')
 397
 398 static void
 399 uuencode_group(const char _in[3], char out[4])
 400 {
 401         const unsigned char *in = (const unsigned char *)_in;
 402         int t;
 403
 404         t = (in[0] << 16) | (in[1] << 8) | in[2];
 405         out[0] = UUENC( 0x3f & (t >> 18) );
 406         out[1] = UUENC( 0x3f & (t >> 12) );
 407         out[2] = UUENC( 0x3f & (t >> 6) );
 408         out[3] = UUENC( 0x3f & t );
 409 }
 410
 411 static int
 412 _uuencode_line(struct archive_write *a, struct shar *shar, const char *inbuf, size_t len)
 413 {
 414         char *buf;
 415         size_t alloc_len;
 416
 417         /* len <= 45 -> expanded to 60 + len byte + new line */
 418         alloc_len = shar->work.length + 62;
 419         if (archive_string_ensure(&shar->work, alloc_len) == NULL) {
 420                 archive_set_error(&a->archive, ENOMEM, "Out of memory");
 421                 return (ARCHIVE_FATAL);
 422         }
 423
 424         buf = shar->work.s + shar->work.length;
 425         *buf++ = UUENC(len);
 426         while (len >= 3) {
 427                 uuencode_group(inbuf, buf);
 428                 len -= 3;
 429                 inbuf += 3;
 430                 buf += 4;
 431         }
 432         if (len != 0) {
 433                 char tmp_buf[3];
 434                 tmp_buf[0] = inbuf[0];
 435                 if (len == 1)
 436                         tmp_buf[1] = '\0';
 437                 else
 438                         tmp_buf[1] = inbuf[1];
 439                 tmp_buf[2] = '\0';
 440                 uuencode_group(tmp_buf, buf);
 441                 buf += 4;
 442         }
 443         *buf++ = '\n';
 444         if ((buf - shar->work.s) > (ptrdiff_t)(shar->work.length + 62)) {
 445                 archive_set_error(&a->archive,
 446                     ARCHIVE_ERRNO_MISC, "Buffer overflow");
 447                 return (ARCHIVE_FATAL);
 448         }
 449         shar->work.length = buf - shar->work.s;
 450         return (ARCHIVE_OK);
 451 }
 452
 453 #define uuencode_line(__a, __shar, __inbuf, __len) \
 454         do { \
 455                 int r = _uuencode_line(__a, __shar, __inbuf, __len); \
 456                 if (r != ARCHIVE_OK) \
 457                         return (ARCHIVE_FATAL); \
 458         } while (0)
 459
 460 static ssize_t
 461 archive_write_shar_data_uuencode(struct archive_write *a, const void *buff,
 462     size_t length)
 463 {
 464         struct shar *shar;
 465         const char *src;
 466         size_t n;
 467         int ret;
 468
 469         shar = (struct shar *)a->format_data;
 470         if (!shar->has_data)
 471                 return (ARCHIVE_OK);
 472         src = (const char *)buff;
 473
 474         if (shar->outpos != 0) {
 475                 n = 45 - shar->outpos;
 476                 if (n > length)
 477                         n = length;
 478                 memcpy(shar->outbuff + shar->outpos, src, n);
 479                 if (shar->outpos + n < 45) {
 480                         shar->outpos += n;
 481                         return length;
 482                 }
 483                 uuencode_line(a, shar, shar->outbuff, 45);
 484                 src += n;
 485                 n = length - n;
 486         } else {
 487                 n = length;
 488         }
 489
 490         while (n >= 45) {
 491                 uuencode_line(a, shar, src, 45);
 492                 src += 45;
 493                 n -= 45;
 494
 495                 if (shar->work.length < 65536)
 496                         continue;
 497                 ret = __archive_write_output(a, shar->work.s,
 498                     shar->work.length);
 499                 if (ret != ARCHIVE_OK)
 500                         return (ARCHIVE_FATAL);
 501                 archive_string_empty(&shar->work);
 502         }
 503         if (n != 0) {
 504                 memcpy(shar->outbuff, src, n);
 505                 shar->outpos = n;
 506         }
 507         return (length);
 508 }
 509
 510 static int
 511 archive_write_shar_finish_entry(struct archive_write *a)
 512 {
 513         const char *g, *p, *u;
 514         struct shar *shar;
 515         int ret;
 516
 517         shar = (struct shar *)a->format_data;
 518         if (shar->entry == NULL)
 519                 return (0);
 520
 521         if (shar->dump) {
 522                 /* Finish uuencoded data. */
 523                 if (shar->has_data) {
 524                         if (shar->outpos > 0)
 525                                 uuencode_line(a, shar, shar->outbuff,
 526                                     shar->outpos);
 527                         archive_strcat(&shar->work, "`\nend\n");
 528                         archive_strcat(&shar->work, "SHAR_END\n");
 529                 }
 530                 /* Restore file mode, owner, flags. */
 531                 /*
 532                  * TODO: Don't immediately restore mode for
 533                  * directories; defer that to end of script.
 534                  */
 535                 archive_string_sprintf(&shar->work, "chmod %o ",
 536                     (unsigned int)(archive_entry_mode(shar->entry) & 07777));
 537                 shar_quote(&shar->work, archive_entry_pathname(shar->entry), 1);
 538                 archive_strcat(&shar->work, "\n");
 539
 540                 u = archive_entry_uname(shar->entry);
 541                 g = archive_entry_gname(shar->entry);
 542                 if (u != NULL || g != NULL) {
 543                         archive_strcat(&shar->work, "chown ");
 544                         if (u != NULL)
 545                                 shar_quote(&shar->work, u, 1);
 546                         if (g != NULL) {
 547                                 archive_strcat(&shar->work, ":");
 548                                 shar_quote(&shar->work, g, 1);
 549                         }
 550                         archive_strcat(&shar->work, " ");
 551                         shar_quote(&shar->work,
 552                             archive_entry_pathname(shar->entry), 1);
 553                         archive_strcat(&shar->work, "\n");
 554                 }
 555
 556                 if ((p = archive_entry_fflags_text(shar->entry)) != NULL) {
 557                         archive_string_sprintf(&shar->work, "chflags %s ", p);
 558                         shar_quote(&shar->work,
 559                             archive_entry_pathname(shar->entry), 1);
 560                         archive_strcat(&shar->work, "\n");
 561                 }
 562
 563                 /* TODO: restore ACLs */
 564
 565         } else {
 566                 if (shar->has_data) {
 567                         /* Finish sed-encoded data:  ensure last line ends. */
 568                         if (!shar->end_of_line)
 569                                 archive_strappend_char(&shar->work, '\n');
 570                         archive_strcat(&shar->work, "SHAR_END\n");
 571                 }
 572         }
 573
 574         archive_entry_free(shar->entry);
 575         shar->entry = NULL;
 576
 577         if (shar->work.length < 65536)
 578                 return (ARCHIVE_OK);
 579
 580         ret = __archive_write_output(a, shar->work.s, shar->work.length);
 581         if (ret != ARCHIVE_OK)
 582                 return (ARCHIVE_FATAL);
 583         archive_string_empty(&shar->work);
 584
 585         return (ARCHIVE_OK);
 586 }
 587
 588 static int
 589 archive_write_shar_close(struct archive_write *a)
 590 {
 591         struct shar *shar;
 592         int ret;
 593
 594         /*
 595          * TODO: Accumulate list of directory names/modes and
 596          * fix them all up at end-of-archive.
 597          */
 598
 599         shar = (struct shar *)a->format_data;
 600
 601         /*
 602          * Only write the end-of-archive markers if the archive was
 603          * actually started.  This avoids problems if someone sets
 604          * shar format, then sets another format (which would invoke
 605          * shar_finish to free the format-specific data).
 606          */
 607         if (shar->wrote_header == 0)
 608                 return (ARCHIVE_OK);
 609
 610         archive_strcat(&shar->work, "exit\n");
 611
 612         ret = __archive_write_output(a, shar->work.s, shar->work.length);
 613         if (ret != ARCHIVE_OK)
 614                 return (ARCHIVE_FATAL);
 615
 616         /* Shar output is never padded. */
 617         archive_write_set_bytes_in_last_block(&a->archive, 1);
 618         /*
 619          * TODO: shar should also suppress padding of
 620          * uncompressed data within gzip/bzip2 streams.
 621          */
 622
 623         return (ARCHIVE_OK);
 624 }
 625
 626 static int
 627 archive_write_shar_free(struct archive_write *a)
 628 {
 629         struct shar *shar;
 630
 631         shar = (struct shar *)a->format_data;
 632         if (shar == NULL)
 633                 return (ARCHIVE_OK);
 634
 635         archive_entry_free(shar->entry);
 636         free(shar->last_dir);
 637         archive_string_free(&(shar->work));
 638         archive_string_free(&(shar->quoted_name));
 639         free(shar);
 640         a->format_data = NULL;
 641         return (ARCHIVE_OK);
 642 }