1 /*- 2 * Copyright (c) 2003-2007 Tim Kientzle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #include "bsdtar_platform.h" 27 __FBSDID("$FreeBSD: src/usr.bin/tar/util.c,v 1.23 2008/12/15 06:00:25 kientzle Exp $"); 28 29 #ifdef HAVE_SYS_STAT_H 30 #include <sys/stat.h> 31 #endif 32 #ifdef HAVE_SYS_TYPES_H 33 #include <sys/types.h> /* Linux doesn't define mode_t, etc. in sys/stat.h. */ 34 #endif 35 #include <ctype.h> 36 #ifdef HAVE_ERRNO_H 37 #include <errno.h> 38 #endif 39 #ifdef HAVE_IO_H 40 #include <io.h> 41 #endif 42 #ifdef HAVE_STDARG_H 43 #include <stdarg.h> 44 #endif 45 #ifdef HAVE_STDINT_H 46 #include <stdint.h> 47 #endif 48 #include <stdio.h> 49 #ifdef HAVE_STDLIB_H 50 #include <stdlib.h> 51 #endif 52 #ifdef HAVE_STRING_H 53 #include <string.h> 54 #endif 55 #ifdef HAVE_WCTYPE_H 56 #include <wctype.h> 57 #else 58 /* If we don't have wctype, we need to hack up some version of iswprint(). */ 59 #define iswprint isprint 60 #endif 61 62 #include "bsdtar.h" 63 #include "err.h" 64 #include "passphrase.h" 65 66 static size_t bsdtar_expand_char(char *, size_t, char); 67 static const char *strip_components(const char *path, int elements); 68 69 #if defined(_WIN32) && !defined(__CYGWIN__) 70 #define read _read 71 #endif 72 73 /* TODO: Hack up a version of mbtowc for platforms with no wide 74 * character support at all. I think the following might suffice, 75 * but it needs careful testing. 76 * #if !HAVE_MBTOWC 77 * #define mbtowc(wcp, p, n) ((*wcp = *p), 1) 78 * #endif 79 */ 80 81 /* 82 * Print a string, taking care with any non-printable characters. 83 * 84 * Note that we use a stack-allocated buffer to receive the formatted 85 * string if we can. This is partly performance (avoiding a call to 86 * malloc()), partly out of expedience (we have to call vsnprintf() 87 * before malloc() anyway to find out how big a buffer we need; we may 88 * as well point that first call at a small local buffer in case it 89 * works), but mostly for safety (so we can use this to print messages 90 * about out-of-memory conditions). 91 */ 92 93 void 94 safe_fprintf(FILE *f, const char *fmt, ...) 95 { 96 char fmtbuff_stack[256]; /* Place to format the printf() string. */ 97 char outbuff[256]; /* Buffer for outgoing characters. */ 98 char *fmtbuff_heap; /* If fmtbuff_stack is too small, we use malloc */ 99 char *fmtbuff; /* Pointer to fmtbuff_stack or fmtbuff_heap. */ 100 int fmtbuff_length; 101 int length, n; 102 va_list ap; 103 const char *p; 104 unsigned i; 105 wchar_t wc; 106 char try_wc; 107 108 /* Use a stack-allocated buffer if we can, for speed and safety. */ 109 fmtbuff_heap = NULL; 110 fmtbuff_length = sizeof(fmtbuff_stack); 111 fmtbuff = fmtbuff_stack; 112 113 /* Try formatting into the stack buffer. */ 114 va_start(ap, fmt); 115 length = vsnprintf(fmtbuff, fmtbuff_length, fmt, ap); 116 va_end(ap); 117 118 /* If the result was too large, allocate a buffer on the heap. */ 119 while (length < 0 || length >= fmtbuff_length) { 120 if (length >= fmtbuff_length) 121 fmtbuff_length = length+1; 122 else if (fmtbuff_length < 8192) 123 fmtbuff_length *= 2; 124 else if (fmtbuff_length < 1000000) 125 fmtbuff_length += fmtbuff_length / 4; 126 else { 127 length = fmtbuff_length; 128 fmtbuff_heap[length-1] = '\0'; 129 break; 130 } 131 free(fmtbuff_heap); 132 fmtbuff_heap = malloc(fmtbuff_length); 133 134 /* Reformat the result into the heap buffer if we can. */ 135 if (fmtbuff_heap != NULL) { 136 fmtbuff = fmtbuff_heap; 137 va_start(ap, fmt); 138 length = vsnprintf(fmtbuff, fmtbuff_length, fmt, ap); 139 va_end(ap); 140 } else { 141 /* Leave fmtbuff pointing to the truncated 142 * string in fmtbuff_stack. */ 143 length = sizeof(fmtbuff_stack) - 1; 144 break; 145 } 146 } 147 148 /* Note: mbrtowc() has a cleaner API, but mbtowc() seems a bit 149 * more portable, so we use that here instead. */ 150 if (mbtowc(NULL, NULL, 1) == -1) { /* Reset the shift state. */ 151 /* mbtowc() should never fail in practice, but 152 * handle the theoretical error anyway. */ 153 free(fmtbuff_heap); 154 return; 155 } 156 157 /* Write data, expanding unprintable characters. */ 158 p = fmtbuff; 159 i = 0; 160 try_wc = 1; 161 while (*p != '\0') { 162 163 /* Convert to wide char, test if the wide 164 * char is printable in the current locale. */ 165 if (try_wc && (n = mbtowc(&wc, p, length)) != -1) { 166 length -= n; 167 if (iswprint(wc) && wc != L'\\') { 168 /* Printable, copy the bytes through. */ 169 while (n-- > 0) 170 outbuff[i++] = *p++; 171 } else { 172 /* Not printable, format the bytes. */ 173 while (n-- > 0) 174 i += (unsigned)bsdtar_expand_char( 175 outbuff, i, *p++); 176 } 177 } else { 178 /* After any conversion failure, don't bother 179 * trying to convert the rest. */ 180 i += (unsigned)bsdtar_expand_char(outbuff, i, *p++); 181 try_wc = 0; 182 } 183 184 /* If our output buffer is full, dump it and keep going. */ 185 if (i > (sizeof(outbuff) - 20)) { 186 outbuff[i] = '\0'; 187 fprintf(f, "%s", outbuff); 188 i = 0; 189 } 190 } 191 outbuff[i] = '\0'; 192 fprintf(f, "%s", outbuff); 193 194 /* If we allocated a heap-based formatting buffer, free it now. */ 195 free(fmtbuff_heap); 196 } 197 198 /* 199 * Render an arbitrary sequence of bytes into printable ASCII characters. 200 */ 201 static size_t 202 bsdtar_expand_char(char *buff, size_t offset, char c) 203 { 204 size_t i = offset; 205 206 if (isprint((unsigned char)c) && c != '\\') 207 buff[i++] = c; 208 else { 209 buff[i++] = '\\'; 210 switch (c) { 211 case '\a': buff[i++] = 'a'; break; 212 case '\b': buff[i++] = 'b'; break; 213 case '\f': buff[i++] = 'f'; break; 214 case '\n': buff[i++] = 'n'; break; 215 #if '\r' != '\n' 216 /* On some platforms, \n and \r are the same. */ 217 case '\r': buff[i++] = 'r'; break; 218 #endif 219 case '\t': buff[i++] = 't'; break; 220 case '\v': buff[i++] = 'v'; break; 221 case '\\': buff[i++] = '\\'; break; 222 default: 223 sprintf(buff + i, "%03o", 0xFF & (int)c); 224 i += 3; 225 } 226 } 227 228 return (i - offset); 229 } 230 231 int 232 yes(const char *fmt, ...) 233 { 234 char buff[32]; 235 char *p; 236 ssize_t l; 237 238 va_list ap; 239 va_start(ap, fmt); 240 vfprintf(stderr, fmt, ap); 241 va_end(ap); 242 fprintf(stderr, " (y/N)? "); 243 fflush(stderr); 244 245 l = read(2, buff, sizeof(buff) - 1); 246 if (l < 0) { 247 fprintf(stderr, "Keyboard read failed\n"); 248 exit(1); 249 } 250 if (l == 0) 251 return (0); 252 buff[l] = 0; 253 254 for (p = buff; *p != '\0'; p++) { 255 if (isspace((unsigned char)*p)) 256 continue; 257 switch(*p) { 258 case 'y': case 'Y': 259 return (1); 260 case 'n': case 'N': 261 return (0); 262 default: 263 return (0); 264 } 265 } 266 267 return (0); 268 } 269 270 /*- 271 * The logic here for -C <dir> attempts to avoid 272 * chdir() as long as possible. For example: 273 * "-C /foo -C /bar file" needs chdir("/bar") but not chdir("/foo") 274 * "-C /foo -C bar file" needs chdir("/foo/bar") 275 * "-C /foo -C bar /file1" does not need chdir() 276 * "-C /foo -C bar /file1 file2" needs chdir("/foo/bar") before file2 277 * 278 * The only correct way to handle this is to record a "pending" chdir 279 * request and combine multiple requests intelligently until we 280 * need to process a non-absolute file. set_chdir() adds the new dir 281 * to the pending list; do_chdir() actually executes any pending chdir. 282 * 283 * This way, programs that build tar command lines don't have to worry 284 * about -C with non-existent directories; such requests will only 285 * fail if the directory must be accessed. 286 * 287 */ 288 void 289 set_chdir(struct bsdtar *bsdtar, const char *newdir) 290 { 291 #if defined(_WIN32) && !defined(__CYGWIN__) 292 if (newdir[0] == '/' || newdir[0] == '\\' || 293 /* Detect this type, for example, "C:\" or "C:/" */ 294 (((newdir[0] >= 'a' && newdir[0] <= 'z') || 295 (newdir[0] >= 'A' && newdir[0] <= 'Z')) && 296 newdir[1] == ':' && (newdir[2] == '/' || newdir[2] == '\\'))) { 297 #else 298 if (newdir[0] == '/') { 299 #endif 300 /* The -C /foo -C /bar case; dump first one. */ 301 free(bsdtar->pending_chdir); 302 bsdtar->pending_chdir = NULL; 303 } 304 if (bsdtar->pending_chdir == NULL) 305 /* Easy case: no previously-saved dir. */ 306 bsdtar->pending_chdir = strdup(newdir); 307 else { 308 /* The -C /foo -C bar case; concatenate */ 309 char *old_pending = bsdtar->pending_chdir; 310 size_t old_len = strlen(old_pending); 311 bsdtar->pending_chdir = malloc(old_len + strlen(newdir) + 2); 312 if (old_pending[old_len - 1] == '/') 313 old_pending[old_len - 1] = '\0'; 314 if (bsdtar->pending_chdir != NULL) 315 sprintf(bsdtar->pending_chdir, "%s/%s", 316 old_pending, newdir); 317 free(old_pending); 318 } 319 if (bsdtar->pending_chdir == NULL) 320 lafe_errc(1, errno, "No memory"); 321 } 322 323 void 324 do_chdir(struct bsdtar *bsdtar) 325 { 326 if (bsdtar->pending_chdir == NULL) 327 return; 328 329 if (chdir(bsdtar->pending_chdir) != 0) { 330 lafe_errc(1, 0, "could not chdir to '%s'\n", 331 bsdtar->pending_chdir); 332 } 333 free(bsdtar->pending_chdir); 334 bsdtar->pending_chdir = NULL; 335 } 336 337 static const char * 338 strip_components(const char *p, int elements) 339 { 340 /* Skip as many elements as necessary. */ 341 while (elements > 0) { 342 switch (*p++) { 343 case '/': 344 #if defined(_WIN32) && !defined(__CYGWIN__) 345 case '\\': /* Support \ path sep on Windows ONLY. */ 346 #endif 347 elements--; 348 break; 349 case '\0': 350 /* Path is too short, skip it. */ 351 return (NULL); 352 } 353 } 354 355 /* Skip any / characters. This handles short paths that have 356 * additional / termination. This also handles the case where 357 * the logic above stops in the middle of a duplicate // 358 * sequence (which would otherwise get converted to an 359 * absolute path). */ 360 for (;;) { 361 switch (*p) { 362 case '/': 363 #if defined(_WIN32) && !defined(__CYGWIN__) 364 case '\\': /* Support \ path sep on Windows ONLY. */ 365 #endif 366 ++p; 367 break; 368 case '\0': 369 return (NULL); 370 default: 371 return (p); 372 } 373 } 374 } 375 376 static void 377 warn_strip_leading_char(struct bsdtar *bsdtar, const char *c) 378 { 379 if (!bsdtar->warned_lead_slash) { 380 lafe_warnc(0, 381 "Removing leading '%c' from member names", 382 c[0]); 383 bsdtar->warned_lead_slash = 1; 384 } 385 } 386 387 static void 388 warn_strip_drive_letter(struct bsdtar *bsdtar) 389 { 390 if (!bsdtar->warned_lead_slash) { 391 lafe_warnc(0, 392 "Removing leading drive letter from " 393 "member names"); 394 bsdtar->warned_lead_slash = 1; 395 } 396 } 397 398 /* 399 * Convert absolute path to non-absolute path by skipping leading 400 * absolute path prefixes. 401 */ 402 static const char* 403 strip_absolute_path(struct bsdtar *bsdtar, const char *p) 404 { 405 const char *rp; 406 407 /* Remove leading "//./" or "//?/" or "//?/UNC/" 408 * (absolute path prefixes used by Windows API) */ 409 if ((p[0] == '/' || p[0] == '\\') && 410 (p[1] == '/' || p[1] == '\\') && 411 (p[2] == '.' || p[2] == '?') && 412 (p[3] == '/' || p[3] == '\\')) 413 { 414 if (p[2] == '?' && 415 (p[4] == 'U' || p[4] == 'u') && 416 (p[5] == 'N' || p[5] == 'n') && 417 (p[6] == 'C' || p[6] == 'c') && 418 (p[7] == '/' || p[7] == '\\')) 419 p += 8; 420 else 421 p += 4; 422 warn_strip_drive_letter(bsdtar); 423 } 424 425 /* Remove multiple leading slashes and Windows drive letters. */ 426 do { 427 rp = p; 428 if (((p[0] >= 'a' && p[0] <= 'z') || 429 (p[0] >= 'A' && p[0] <= 'Z')) && 430 p[1] == ':') { 431 p += 2; 432 warn_strip_drive_letter(bsdtar); 433 } 434 435 /* Remove leading "/../", "/./", "//", etc. */ 436 while (p[0] == '/' || p[0] == '\\') { 437 if (p[1] == '.' && 438 p[2] == '.' && 439 (p[3] == '/' || p[3] == '\\')) { 440 p += 3; /* Remove "/..", leave "/" for next pass. */ 441 } else if (p[1] == '.' && 442 (p[2] == '/' || p[2] == '\\')) { 443 p += 2; /* Remove "/.", leave "/" for next pass. */ 444 } else 445 p += 1; /* Remove "/". */ 446 warn_strip_leading_char(bsdtar, rp); 447 } 448 } while (rp != p); 449 450 return (p); 451 } 452 453 /* 454 * Handle --strip-components and any future path-rewriting options. 455 * Returns non-zero if the pathname should not be extracted. 456 * 457 * Note: The rewrites are applied uniformly to pathnames and hardlink 458 * names but not to symlink bodies. This is deliberate: Symlink 459 * bodies are not necessarily filenames. Even when they are, they 460 * need to be interpreted relative to the directory containing them, 461 * so simple rewrites like this are rarely appropriate. 462 * 463 * TODO: Support pax-style regex path rewrites. 464 */ 465 int 466 edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry) 467 { 468 const char *name = archive_entry_pathname(entry); 469 const char *original_name = name; 470 const char *hardlinkname = archive_entry_hardlink(entry); 471 const char *original_hardlinkname = hardlinkname; 472 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) 473 char *subst_name; 474 int r; 475 476 /* Apply user-specified substitution to pathname. */ 477 r = apply_substitution(bsdtar, name, &subst_name, 0, 0); 478 if (r == -1) { 479 lafe_warnc(0, "Invalid substitution, skipping entry"); 480 return 1; 481 } 482 if (r == 1) { 483 archive_entry_copy_pathname(entry, subst_name); 484 if (*subst_name == '\0') { 485 free(subst_name); 486 return -1; 487 } else 488 free(subst_name); 489 name = archive_entry_pathname(entry); 490 original_name = name; 491 } 492 493 /* Apply user-specified substitution to hardlink target. */ 494 if (hardlinkname != NULL) { 495 r = apply_substitution(bsdtar, hardlinkname, &subst_name, 0, 1); 496 if (r == -1) { 497 lafe_warnc(0, "Invalid substitution, skipping entry"); 498 return 1; 499 } 500 if (r == 1) { 501 archive_entry_copy_hardlink(entry, subst_name); 502 free(subst_name); 503 } 504 hardlinkname = archive_entry_hardlink(entry); 505 original_hardlinkname = hardlinkname; 506 } 507 508 /* Apply user-specified substitution to symlink body. */ 509 if (archive_entry_symlink(entry) != NULL) { 510 r = apply_substitution(bsdtar, archive_entry_symlink(entry), &subst_name, 1, 0); 511 if (r == -1) { 512 lafe_warnc(0, "Invalid substitution, skipping entry"); 513 return 1; 514 } 515 if (r == 1) { 516 archive_entry_copy_symlink(entry, subst_name); 517 free(subst_name); 518 } 519 } 520 #endif 521 522 /* Strip leading dir names as per --strip-components option. */ 523 if (bsdtar->strip_components > 0) { 524 name = strip_components(name, bsdtar->strip_components); 525 if (name == NULL) 526 return (1); 527 528 if (hardlinkname != NULL) { 529 hardlinkname = strip_components(hardlinkname, 530 bsdtar->strip_components); 531 if (hardlinkname == NULL) 532 return (1); 533 } 534 } 535 536 if (!bsdtar->option_absolute_paths) { 537 /* By default, don't write or restore absolute pathnames. */ 538 name = strip_absolute_path(bsdtar, name); 539 if (*name == '\0') 540 name = "."; 541 542 if (hardlinkname != NULL) { 543 hardlinkname = strip_absolute_path(bsdtar, hardlinkname); 544 if (*hardlinkname == '\0') 545 return (1); 546 } 547 } else { 548 /* Strip redundant leading '/' characters. */ 549 while (name[0] == '/' && name[1] == '/') 550 name++; 551 } 552 553 /* Replace name in archive_entry. */ 554 if (name != original_name) { 555 archive_entry_copy_pathname(entry, name); 556 } 557 if (hardlinkname != original_hardlinkname) { 558 archive_entry_copy_hardlink(entry, hardlinkname); 559 } 560 return (0); 561 } 562 563 /* 564 * It would be nice to just use printf() for formatting large numbers, 565 * but the compatibility problems are quite a headache. Hence the 566 * following simple utility function. 567 */ 568 const char * 569 tar_i64toa(int64_t n0) 570 { 571 static char buff[24]; 572 uint64_t n = n0 < 0 ? -n0 : n0; 573 char *p = buff + sizeof(buff); 574 575 *--p = '\0'; 576 do { 577 *--p = '0' + (int)(n % 10); 578 } while (n /= 10); 579 if (n0 < 0) 580 *--p = '-'; 581 return p; 582 } 583 584 /* 585 * Like strcmp(), but try to be a little more aware of the fact that 586 * we're comparing two paths. Right now, it just handles leading 587 * "./" and trailing '/' specially, so that "a/b/" == "./a/b" 588 * 589 * TODO: Make this better, so that "./a//b/./c/" == "a/b/c" 590 * TODO: After this works, push it down into libarchive. 591 * TODO: Publish the path normalization routines in libarchive so 592 * that bsdtar can normalize paths and use fast strcmp() instead 593 * of this. 594 * 595 * Note: This is currently only used within write.c, so should 596 * not handle \ path separators. 597 */ 598 599 int 600 pathcmp(const char *a, const char *b) 601 { 602 /* Skip leading './' */ 603 if (a[0] == '.' && a[1] == '/' && a[2] != '\0') 604 a += 2; 605 if (b[0] == '.' && b[1] == '/' && b[2] != '\0') 606 b += 2; 607 /* Find the first difference, or return (0) if none. */ 608 while (*a == *b) { 609 if (*a == '\0') 610 return (0); 611 a++; 612 b++; 613 } 614 /* 615 * If one ends in '/' and the other one doesn't, 616 * they're the same. 617 */ 618 if (a[0] == '/' && a[1] == '\0' && b[0] == '\0') 619 return (0); 620 if (a[0] == '\0' && b[0] == '/' && b[1] == '\0') 621 return (0); 622 /* They're really different, return the correct sign. */ 623 return (*(const unsigned char *)a - *(const unsigned char *)b); 624 } 625 626 #define PPBUFF_SIZE 1024 627 const char * 628 passphrase_callback(struct archive *a, void *_client_data) 629 { 630 struct bsdtar *bsdtar = (struct bsdtar *)_client_data; 631 (void)a; /* UNUSED */ 632 633 if (bsdtar->ppbuff == NULL) { 634 bsdtar->ppbuff = malloc(PPBUFF_SIZE); 635 if (bsdtar->ppbuff == NULL) 636 lafe_errc(1, errno, "Out of memory"); 637 } 638 return lafe_readpassphrase("Enter passphrase:", 639 bsdtar->ppbuff, PPBUFF_SIZE); 640 } 641 642 void 643 passphrase_free(char *ppbuff) 644 { 645 if (ppbuff != NULL) { 646 memset(ppbuff, 0, PPBUFF_SIZE); 647 free(ppbuff); 648 } 649 } 650 651 /* 652 * Display information about the current file. 653 * 654 * The format here roughly duplicates the output of 'ls -l'. 655 * This is based on SUSv2, where 'tar tv' is documented as 656 * listing additional information in an "unspecified format," 657 * and 'pax -l' is documented as using the same format as 'ls -l'. 658 */ 659 void 660 list_item_verbose(struct bsdtar *bsdtar, FILE *out, struct archive_entry *entry) 661 { 662 char tmp[100]; 663 size_t w; 664 const char *p; 665 const char *fmt; 666 time_t tim; 667 static time_t now; 668 669 /* 670 * We avoid collecting the entire list in memory at once by 671 * listing things as we see them. However, that also means we can't 672 * just pre-compute the field widths. Instead, we start with guesses 673 * and just widen them as necessary. These numbers are completely 674 * arbitrary. 675 */ 676 if (!bsdtar->u_width) { 677 bsdtar->u_width = 6; 678 bsdtar->gs_width = 13; 679 } 680 if (!now) 681 time(&now); 682 fprintf(out, "%s %d ", 683 archive_entry_strmode(entry), 684 archive_entry_nlink(entry)); 685 686 /* Use uname if it's present, else uid. */ 687 p = archive_entry_uname(entry); 688 if ((p == NULL) || (*p == '\0')) { 689 sprintf(tmp, "%lu ", 690 (unsigned long)archive_entry_uid(entry)); 691 p = tmp; 692 } 693 w = strlen(p); 694 if (w > bsdtar->u_width) 695 bsdtar->u_width = w; 696 fprintf(out, "%-*s ", (int)bsdtar->u_width, p); 697 698 /* Use gname if it's present, else gid. */ 699 p = archive_entry_gname(entry); 700 if (p != NULL && p[0] != '\0') { 701 fprintf(out, "%s", p); 702 w = strlen(p); 703 } else { 704 sprintf(tmp, "%lu", 705 (unsigned long)archive_entry_gid(entry)); 706 w = strlen(tmp); 707 fprintf(out, "%s", tmp); 708 } 709 710 /* 711 * Print device number or file size, right-aligned so as to make 712 * total width of group and devnum/filesize fields be gs_width. 713 * If gs_width is too small, grow it. 714 */ 715 if (archive_entry_filetype(entry) == AE_IFCHR 716 || archive_entry_filetype(entry) == AE_IFBLK) { 717 sprintf(tmp, "%lu,%lu", 718 (unsigned long)archive_entry_rdevmajor(entry), 719 (unsigned long)archive_entry_rdevminor(entry)); 720 } else { 721 strcpy(tmp, tar_i64toa(archive_entry_size(entry))); 722 } 723 if (w + strlen(tmp) >= bsdtar->gs_width) 724 bsdtar->gs_width = w+strlen(tmp)+1; 725 fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp); 726 727 /* Format the time using 'ls -l' conventions. */ 728 tim = archive_entry_mtime(entry); 729 #define HALF_YEAR (time_t)365 * 86400 / 2 730 #if defined(_WIN32) && !defined(__CYGWIN__) 731 #define DAY_FMT "%d" /* Windows' strftime function does not support %e format. */ 732 #else 733 #define DAY_FMT "%e" /* Day number without leading zeros */ 734 #endif 735 if (tim < now - HALF_YEAR || tim > now + HALF_YEAR) 736 fmt = bsdtar->day_first ? DAY_FMT " %b %Y" : "%b " DAY_FMT " %Y"; 737 else 738 fmt = bsdtar->day_first ? DAY_FMT " %b %H:%M" : "%b " DAY_FMT " %H:%M"; 739 strftime(tmp, sizeof(tmp), fmt, localtime(&tim)); 740 fprintf(out, " %s ", tmp); 741 safe_fprintf(out, "%s", archive_entry_pathname(entry)); 742 743 /* Extra information for links. */ 744 if (archive_entry_hardlink(entry)) /* Hard link */ 745 safe_fprintf(out, " link to %s", 746 archive_entry_hardlink(entry)); 747 else if (archive_entry_symlink(entry)) /* Symbolic link */ 748 safe_fprintf(out, " -> %s", archive_entry_symlink(entry)); 749 } 750