1 /* 2 * Copyright (c) Ian F. Darwin 1986-1995. 3 * Software written by Ian F. Darwin and others; 4 * maintained 1995-present by Christos Zoulas and others. 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 immediately at the beginning of the file, without modification, 11 * this list of conditions, and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR 20 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 /* 29 * compress routines: 30 * zmagic() - returns 0 if not recognized, uncompresses and prints 31 * information if recognized 32 * uncompress(method, old, n, newch) - uncompress old into new, 33 * using method, return sizeof new 34 */ 35 #include "file.h" 36 37 #ifndef lint 38 FILE_RCSID("@(#)$File: compress.c,v 1.93 2016/03/31 17:51:12 christos Exp $") 39 #endif 40 41 #include "magic.h" 42 #include <stdlib.h> 43 #ifdef HAVE_UNISTD_H 44 #include <unistd.h> 45 #endif 46 #include <string.h> 47 #include <errno.h> 48 #include <ctype.h> 49 #include <stdarg.h> 50 #ifdef HAVE_SIGNAL_H 51 #include <signal.h> 52 # ifndef HAVE_SIG_T 53 typedef void (*sig_t)(int); 54 # endif /* HAVE_SIG_T */ 55 #endif 56 #if !defined(__MINGW32__) && !defined(WIN32) 57 #include <sys/ioctl.h> 58 #endif 59 #ifdef HAVE_SYS_WAIT_H 60 #include <sys/wait.h> 61 #endif 62 #if defined(HAVE_SYS_TIME_H) 63 #include <sys/time.h> 64 #endif 65 #if defined(HAVE_ZLIB_H) && defined(HAVE_LIBZ) 66 #define BUILTIN_DECOMPRESS 67 #include <zlib.h> 68 #define ZLIBSUPPORT 69 #endif 70 #ifdef DEBUG 71 int tty = -1; 72 #define DPRINTF(...) do { \ 73 if (tty == -1) \ 74 tty = open("/dev/tty", O_RDWR); \ 75 if (tty == -1) \ 76 abort(); \ 77 dprintf(tty, __VA_ARGS__); \ 78 } while (/*CONSTCOND*/0) 79 #else 80 #define DPRINTF(...) 81 #endif 82 83 #ifdef ZLIBSUPPORT 84 /* 85 * The following python code is not really used because ZLIBSUPPORT is only 86 * defined if we have a built-in zlib, and the built-in zlib handles that. 87 */ 88 static const char zlibcode[] = 89 "import sys, zlib; sys.stdout.write(zlib.decompress(sys.stdin.read()))"; 90 91 static const char *zlib_args[] = { "python", "-c", zlibcode, NULL }; 92 93 static int 94 zlibcmp(const unsigned char *buf) 95 { 96 unsigned short x = 1; 97 unsigned char *s = (unsigned char *)&x; 98 99 if ((buf[0] & 0xf) != 8 || (buf[0] & 0x80) != 0) 100 return 0; 101 if (s[0] != 1) /* endianness test */ 102 x = buf[0] | (buf[1] << 8); 103 else 104 x = buf[1] | (buf[0] << 8); 105 if (x % 31) 106 return 0; 107 return 1; 108 } 109 #endif 110 111 #define gzip_flags "-cd" 112 #define lrzip_flags "-do" 113 #define lzip_flags gzip_flags 114 115 static const char *gzip_args[] = { 116 "gzip", gzip_flags, NULL 117 }; 118 static const char *uncompress_args[] = { 119 "uncompress", "-c", NULL 120 }; 121 static const char *bzip2_args[] = { 122 "bzip2", "-cd", NULL 123 }; 124 static const char *lzip_args[] = { 125 "lzip", lzip_flags, NULL 126 }; 127 static const char *xz_args[] = { 128 "xz", "-cd", NULL 129 }; 130 static const char *lrzip_args[] = { 131 "lrzip", lrzip_flags, NULL 132 }; 133 static const char *lz4_args[] = { 134 "lz4", "-cd", NULL 135 }; 136 137 private const struct { 138 const void *magic; 139 size_t maglen; 140 const char **argv; 141 } compr[] = { 142 { "\037\235", 2, gzip_args }, /* compressed */ 143 /* Uncompress can get stuck; so use gzip first if we have it 144 * Idea from Damien Clark, thanks! */ 145 { "\037\235", 2, uncompress_args }, /* compressed */ 146 { "\037\213", 2, gzip_args }, /* gzipped */ 147 { "\037\236", 2, gzip_args }, /* frozen */ 148 { "\037\240", 2, gzip_args }, /* SCO LZH */ 149 /* the standard pack utilities do not accept standard input */ 150 { "\037\036", 2, gzip_args }, /* packed */ 151 { "PK\3\4", 4, gzip_args }, /* pkzipped, */ 152 /* ...only first file examined */ 153 { "BZh", 3, bzip2_args }, /* bzip2-ed */ 154 { "LZIP", 4, lzip_args }, /* lzip-ed */ 155 { "\3757zXZ\0", 6, xz_args }, /* XZ Utils */ 156 { "LRZI", 4, lrzip_args }, /* LRZIP */ 157 { "\004\"M\030",4, lz4_args }, /* LZ4 */ 158 #ifdef ZLIBSUPPORT 159 { zlibcmp, 0, zlib_args }, /* zlib */ 160 #endif 161 }; 162 163 #define OKDATA 0 164 #define NODATA 1 165 #define ERRDATA 2 166 167 private ssize_t swrite(int, const void *, size_t); 168 #if HAVE_FORK 169 private size_t ncompr = sizeof(compr) / sizeof(compr[0]); 170 private int uncompressbuf(int, size_t, size_t, const unsigned char *, 171 unsigned char **, size_t *); 172 #ifdef BUILTIN_DECOMPRESS 173 private int uncompresszlib(const unsigned char *, unsigned char **, size_t, 174 size_t *, int); 175 private int uncompressgzipped(const unsigned char *, unsigned char **, size_t, 176 size_t *); 177 #endif 178 static int makeerror(unsigned char **, size_t *, const char *, ...) 179 __attribute__((__format__(__printf__, 3, 4))); 180 private const char *methodname(size_t); 181 182 protected int 183 file_zmagic(struct magic_set *ms, int fd, const char *name, 184 const unsigned char *buf, size_t nbytes) 185 { 186 unsigned char *newbuf = NULL; 187 size_t i, nsz; 188 char *rbuf; 189 file_pushbuf_t *pb; 190 int rv = 0; 191 int mime = ms->flags & MAGIC_MIME; 192 #ifdef HAVE_SIGNAL_H 193 sig_t osigpipe; 194 #endif 195 196 if ((ms->flags & MAGIC_COMPRESS) == 0) 197 return 0; 198 199 #ifdef HAVE_SIGNAL_H 200 osigpipe = signal(SIGPIPE, SIG_IGN); 201 #endif 202 for (i = 0; i < ncompr; i++) { 203 int zm; 204 if (nbytes < compr[i].maglen) 205 continue; 206 #ifdef ZLIBSUPPORT 207 if (compr[i].maglen == 0) 208 zm = (CAST(int (*)(const unsigned char *), 209 CCAST(void *, compr[i].magic)))(buf); 210 else 211 #endif 212 zm = memcmp(buf, compr[i].magic, compr[i].maglen) == 0; 213 214 if (!zm) 215 continue; 216 nsz = nbytes; 217 rv = uncompressbuf(fd, ms->bytes_max, i, buf, &newbuf, &nsz); 218 DPRINTF("uncompressbuf = %d, %s, %zu\n", rv, (char *)newbuf, 219 nsz); 220 switch (rv) { 221 case OKDATA: 222 case ERRDATA: 223 224 ms->flags &= ~MAGIC_COMPRESS; 225 if (rv == ERRDATA) 226 rv = file_printf(ms, "%s ERROR: %s", 227 methodname(i), newbuf); 228 else 229 rv = file_buffer(ms, -1, name, newbuf, nsz); 230 if (rv == -1) 231 goto error; 232 DPRINTF("rv = %d\n", rv); 233 if ((ms->flags & MAGIC_COMPRESS_TRANSP) != 0) 234 goto out; 235 if (mime != MAGIC_MIME && mime != 0) 236 goto out; 237 if ((file_printf(ms, 238 mime ? " compressed-encoding=" : " (")) == -1) 239 goto error; 240 if ((pb = file_push_buffer(ms)) == NULL) 241 goto error; 242 if (file_buffer(ms, -1, NULL, buf, nbytes) == -1) 243 goto error; 244 if ((rbuf = file_pop_buffer(ms, pb)) != NULL) { 245 if (file_printf(ms, "%s", rbuf) == -1) { 246 free(rbuf); 247 goto error; 248 } 249 free(rbuf); 250 } 251 if (!mime && file_printf(ms, ")") == -1) 252 goto error; 253 goto out; 254 case NODATA: 255 goto out; 256 default: 257 abort(); 258 } 259 } 260 out: 261 rv = 1; 262 error: 263 #ifdef HAVE_SIGNAL_H 264 (void)signal(SIGPIPE, osigpipe); 265 #endif 266 free(newbuf); 267 ms->flags |= MAGIC_COMPRESS; 268 DPRINTF("Zmagic returns %d\n", rv); 269 return rv; 270 } 271 #endif 272 /* 273 * `safe' write for sockets and pipes. 274 */ 275 private ssize_t 276 swrite(int fd, const void *buf, size_t n) 277 { 278 ssize_t rv; 279 size_t rn = n; 280 281 do 282 switch (rv = write(fd, buf, n)) { 283 case -1: 284 if (errno == EINTR) 285 continue; 286 return -1; 287 default: 288 n -= rv; 289 buf = CAST(const char *, buf) + rv; 290 break; 291 } 292 while (n > 0); 293 return rn; 294 } 295 296 297 /* 298 * `safe' read for sockets and pipes. 299 */ 300 protected ssize_t 301 sread(int fd, void *buf, size_t n, int canbepipe __attribute__((__unused__))) 302 { 303 ssize_t rv; 304 #ifdef FIONREAD 305 int t = 0; 306 #endif 307 size_t rn = n; 308 309 if (fd == STDIN_FILENO) 310 goto nocheck; 311 312 #ifdef FIONREAD 313 if (canbepipe && (ioctl(fd, FIONREAD, &t) == -1 || t == 0)) { 314 #ifdef FD_ZERO 315 ssize_t cnt; 316 for (cnt = 0;; cnt++) { 317 fd_set check; 318 struct timeval tout = {0, 100 * 1000}; 319 int selrv; 320 321 FD_ZERO(&check); 322 FD_SET(fd, &check); 323 324 /* 325 * Avoid soft deadlock: do not read if there 326 * is nothing to read from sockets and pipes. 327 */ 328 selrv = select(fd + 1, &check, NULL, NULL, &tout); 329 if (selrv == -1) { 330 if (errno == EINTR || errno == EAGAIN) 331 continue; 332 } else if (selrv == 0 && cnt >= 5) { 333 return 0; 334 } else 335 break; 336 } 337 #endif 338 (void)ioctl(fd, FIONREAD, &t); 339 } 340 341 if (t > 0 && (size_t)t < n) { 342 n = t; 343 rn = n; 344 } 345 #endif 346 347 nocheck: 348 do 349 switch ((rv = read(fd, buf, n))) { 350 case -1: 351 if (errno == EINTR) 352 continue; 353 return -1; 354 case 0: 355 return rn - n; 356 default: 357 n -= rv; 358 buf = ((char *)buf) + rv; 359 break; 360 } 361 while (n > 0); 362 return rn; 363 } 364 365 protected int 366 file_pipe2file(struct magic_set *ms, int fd, const void *startbuf, 367 size_t nbytes) 368 { 369 char buf[4096]; 370 ssize_t r; 371 int tfd; 372 373 (void)strlcpy(buf, "/tmp/file.XXXXXX", sizeof buf); 374 #ifndef HAVE_MKSTEMP 375 { 376 char *ptr = mktemp(buf); 377 tfd = open(ptr, O_RDWR|O_TRUNC|O_EXCL|O_CREAT, 0600); 378 r = errno; 379 (void)unlink(ptr); 380 errno = r; 381 } 382 #else 383 { 384 int te; 385 tfd = mkstemp(buf); 386 te = errno; 387 (void)unlink(buf); 388 errno = te; 389 } 390 #endif 391 if (tfd == -1) { 392 file_error(ms, errno, 393 "cannot create temporary file for pipe copy"); 394 return -1; 395 } 396 397 if (swrite(tfd, startbuf, nbytes) != (ssize_t)nbytes) 398 r = 1; 399 else { 400 while ((r = sread(fd, buf, sizeof(buf), 1)) > 0) 401 if (swrite(tfd, buf, (size_t)r) != r) 402 break; 403 } 404 405 switch (r) { 406 case -1: 407 file_error(ms, errno, "error copying from pipe to temp file"); 408 return -1; 409 case 0: 410 break; 411 default: 412 file_error(ms, errno, "error while writing to temp file"); 413 return -1; 414 } 415 416 /* 417 * We duplicate the file descriptor, because fclose on a 418 * tmpfile will delete the file, but any open descriptors 419 * can still access the phantom inode. 420 */ 421 if ((fd = dup2(tfd, fd)) == -1) { 422 file_error(ms, errno, "could not dup descriptor for temp file"); 423 return -1; 424 } 425 (void)close(tfd); 426 if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) { 427 file_badseek(ms); 428 return -1; 429 } 430 return fd; 431 } 432 #if HAVE_FORK 433 #ifdef BUILTIN_DECOMPRESS 434 435 #define FHCRC (1 << 1) 436 #define FEXTRA (1 << 2) 437 #define FNAME (1 << 3) 438 #define FCOMMENT (1 << 4) 439 440 441 private int 442 uncompressgzipped(const unsigned char *old, unsigned char **newch, 443 size_t bytes_max, size_t *n) 444 { 445 unsigned char flg = old[3]; 446 size_t data_start = 10; 447 448 if (flg & FEXTRA) { 449 if (data_start + 1 >= *n) 450 goto err; 451 data_start += 2 + old[data_start] + old[data_start + 1] * 256; 452 } 453 if (flg & FNAME) { 454 while(data_start < *n && old[data_start]) 455 data_start++; 456 data_start++; 457 } 458 if (flg & FCOMMENT) { 459 while(data_start < *n && old[data_start]) 460 data_start++; 461 data_start++; 462 } 463 if (flg & FHCRC) 464 data_start += 2; 465 466 if (data_start >= *n) 467 goto err; 468 469 *n -= data_start; 470 old += data_start; 471 return uncompresszlib(old, newch, bytes_max, n, 0); 472 err: 473 return makeerror(newch, n, "File too short"); 474 } 475 476 private int 477 uncompresszlib(const unsigned char *old, unsigned char **newch, 478 size_t bytes_max, size_t *n, int zlib) 479 { 480 int rc; 481 z_stream z; 482 483 if ((*newch = CAST(unsigned char *, malloc(bytes_max + 1))) == NULL) 484 return makeerror(newch, n, "No buffer, %s", strerror(errno)); 485 486 z.next_in = CCAST(Bytef *, old); 487 z.avail_in = CAST(uint32_t, *n); 488 z.next_out = *newch; 489 z.avail_out = bytes_max; 490 z.zalloc = Z_NULL; 491 z.zfree = Z_NULL; 492 z.opaque = Z_NULL; 493 494 /* LINTED bug in header macro */ 495 rc = zlib ? inflateInit(&z) : inflateInit2(&z, -15); 496 if (rc != Z_OK) 497 goto err; 498 499 rc = inflate(&z, Z_SYNC_FLUSH); 500 if (rc != Z_OK && rc != Z_STREAM_END) 501 goto err; 502 503 *n = (size_t)z.total_out; 504 rc = inflateEnd(&z); 505 if (rc != Z_OK) 506 goto err; 507 508 /* let's keep the nul-terminate tradition */ 509 (*newch)[*n] = '\0'; 510 511 return OKDATA; 512 err: 513 strlcpy((char *)*newch, z.msg, bytes_max); 514 *n = strlen((char *)*newch); 515 return ERRDATA; 516 } 517 #endif 518 519 static int 520 makeerror(unsigned char **buf, size_t *len, const char *fmt, ...) 521 { 522 char *msg; 523 va_list ap; 524 int rv; 525 526 va_start(ap, fmt); 527 rv = vasprintf(&msg, fmt, ap); 528 va_end(ap); 529 if (rv < 0) { 530 *buf = NULL; 531 *len = 0; 532 return NODATA; 533 } 534 *buf = (unsigned char *)msg; 535 *len = strlen(msg); 536 return ERRDATA; 537 } 538 539 static void 540 closefd(int *fd, size_t i) 541 { 542 if (fd[i] == -1) 543 return; 544 (void) close(fd[i]); 545 fd[i] = -1; 546 } 547 548 static void 549 closep(int *fd) 550 { 551 size_t i; 552 for (i = 0; i < 2; i++) 553 closefd(fd, i); 554 } 555 556 static void 557 copydesc(int i, int *fd) 558 { 559 int j = fd[i == STDIN_FILENO ? 0 : 1]; 560 if (j == i) 561 return; 562 if (dup2(j, i) == -1) { 563 DPRINTF("dup(%d, %d) failed (%s)\n", j, i, strerror(errno)); 564 exit(1); 565 } 566 closep(fd); 567 } 568 569 static void 570 writechild(int fdp[3][2], const void *old, size_t n) 571 { 572 int status; 573 574 closefd(fdp[STDIN_FILENO], 0); 575 /* 576 * fork again, to avoid blocking because both 577 * pipes filled 578 */ 579 switch (fork()) { 580 case 0: /* child */ 581 closefd(fdp[STDOUT_FILENO], 0); 582 if (swrite(fdp[STDIN_FILENO][1], old, n) != (ssize_t)n) { 583 DPRINTF("Write failed (%s)\n", strerror(errno)); 584 exit(1); 585 } 586 exit(0); 587 /*NOTREACHED*/ 588 589 case -1: 590 DPRINTF("Fork failed (%s)\n", strerror(errno)); 591 exit(1); 592 /*NOTREACHED*/ 593 594 default: /* parent */ 595 if (wait(&status) == -1) { 596 DPRINTF("Wait failed (%s)\n", strerror(errno)); 597 exit(1); 598 } 599 DPRINTF("Grandchild wait return %#x\n", status); 600 } 601 closefd(fdp[STDIN_FILENO], 1); 602 } 603 604 static ssize_t 605 filter_error(unsigned char *ubuf, ssize_t n) 606 { 607 char *p; 608 char *buf; 609 610 ubuf[n] = '\0'; 611 buf = (char *)ubuf; 612 while (isspace((unsigned char)*buf)) 613 buf++; 614 DPRINTF("Filter error[[[%s]]]\n", buf); 615 if ((p = strchr((char *)buf, '\n')) != NULL) 616 *p = '\0'; 617 if ((p = strchr((char *)buf, ';')) != NULL) 618 *p = '\0'; 619 if ((p = strrchr((char *)buf, ':')) != NULL) { 620 ++p; 621 while (isspace((unsigned char)*p)) 622 p++; 623 n = strlen(p); 624 memmove(ubuf, p, n + 1); 625 } 626 DPRINTF("Filter error after[[[%s]]]\n", (char *)ubuf); 627 if (islower(*ubuf)) 628 *ubuf = toupper(*ubuf); 629 return n; 630 } 631 632 private const char * 633 methodname(size_t method) 634 { 635 #ifdef BUILTIN_DECOMPRESS 636 /* FIXME: This doesn't cope with bzip2 */ 637 if (method == 2 || compr[method].maglen == 0) 638 return "zlib"; 639 #endif 640 return compr[method].argv[0]; 641 } 642 643 private int 644 uncompressbuf(int fd, size_t bytes_max, size_t method, const unsigned char *old, 645 unsigned char **newch, size_t* n) 646 { 647 int fdp[3][2]; 648 int status, rv; 649 size_t i; 650 ssize_t r; 651 652 #ifdef BUILTIN_DECOMPRESS 653 /* FIXME: This doesn't cope with bzip2 */ 654 if (method == 2) 655 return uncompressgzipped(old, newch, bytes_max, n); 656 if (compr[method].maglen == 0) 657 return uncompresszlib(old, newch, bytes_max, n, 1); 658 #endif 659 (void)fflush(stdout); 660 (void)fflush(stderr); 661 662 for (i = 0; i < __arraycount(fdp); i++) 663 fdp[i][0] = fdp[i][1] = -1; 664 665 if ((fd == -1 && pipe(fdp[STDIN_FILENO]) == -1) || 666 pipe(fdp[STDOUT_FILENO]) == -1 || pipe(fdp[STDERR_FILENO]) == -1) { 667 closep(fdp[STDIN_FILENO]); 668 closep(fdp[STDOUT_FILENO]); 669 return makeerror(newch, n, "Cannot create pipe, %s", 670 strerror(errno)); 671 } 672 switch (fork()) { 673 case 0: /* child */ 674 if (fd != -1) { 675 fdp[STDIN_FILENO][0] = fd; 676 (void) lseek(fd, (off_t)0, SEEK_SET); 677 } 678 679 for (i = 0; i < __arraycount(fdp); i++) 680 copydesc(i, fdp[i]); 681 682 (void)execvp(compr[method].argv[0], 683 (char *const *)(intptr_t)compr[method].argv); 684 dprintf(STDERR_FILENO, "exec `%s' failed, %s", 685 compr[method].argv[0], strerror(errno)); 686 exit(1); 687 /*NOTREACHED*/ 688 case -1: 689 return makeerror(newch, n, "Cannot fork, %s", 690 strerror(errno)); 691 692 default: /* parent */ 693 for (i = 1; i < __arraycount(fdp); i++) 694 closefd(fdp[i], 1); 695 696 /* Write the buffer data to the child, if we don't have fd */ 697 if (fd == -1) 698 writechild(fdp, old, *n); 699 700 *newch = CAST(unsigned char *, malloc(bytes_max + 1)); 701 if (*newch == NULL) { 702 rv = makeerror(newch, n, "No buffer, %s", 703 strerror(errno)); 704 goto err; 705 } 706 rv = OKDATA; 707 if ((r = sread(fdp[STDOUT_FILENO][0], *newch, bytes_max, 0)) > 0) 708 break; 709 DPRINTF("Read stdout failed %d (%s)\n", fdp[STDOUT_FILENO][0], 710 r != -1 ? strerror(errno) : "no data"); 711 712 rv = ERRDATA; 713 if (r == 0 && 714 (r = sread(fdp[STDERR_FILENO][0], *newch, bytes_max, 0)) > 0) 715 { 716 r = filter_error(*newch, r); 717 break; 718 } 719 free(*newch); 720 if (r == 0) 721 rv = makeerror(newch, n, "Read failed, %s", 722 strerror(errno)); 723 else 724 rv = makeerror(newch, n, "No data"); 725 goto err; 726 } 727 728 *n = r; 729 /* NUL terminate, as every buffer is handled here. */ 730 (*newch)[*n] = '\0'; 731 err: 732 closefd(fdp[STDIN_FILENO], 1); 733 closefd(fdp[STDOUT_FILENO], 0); 734 closefd(fdp[STDERR_FILENO], 0); 735 if (wait(&status) == -1) { 736 free(*newch); 737 rv = makeerror(newch, n, "Wait failed, %s", strerror(errno)); 738 DPRINTF("Child wait return %#x\n", status); 739 } else if (!WIFEXITED(status)) { 740 DPRINTF("Child not exited (0x%x)\n", status); 741 } else if (WEXITSTATUS(status) != 0) { 742 DPRINTF("Child exited (0x%d)\n", WEXITSTATUS(status)); 743 } 744 745 closefd(fdp[STDIN_FILENO], 0); 746 DPRINTF("Returning %p n=%zu rv=%d\n", *newch, *n, rv); 747 748 return rv; 749 } 750 #endif 751