compress.c revision 302555
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 38FILE_RCSID("@(#)$File: compress.c,v 1.97 2016/05/13 23:02:28 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 53typedef 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) 66#define BUILTIN_DECOMPRESS 67#include <zlib.h> 68#endif 69#ifdef DEBUG 70int tty = -1; 71#define DPRINTF(...) do { \ 72 if (tty == -1) \ 73 tty = open("/dev/tty", O_RDWR); \ 74 if (tty == -1) \ 75 abort(); \ 76 dprintf(tty, __VA_ARGS__); \ 77} while (/*CONSTCOND*/0) 78#else 79#define DPRINTF(...) 80#endif 81 82#ifdef ZLIBSUPPORT 83/* 84 * The following python code is not really used because ZLIBSUPPORT is only 85 * defined if we have a built-in zlib, and the built-in zlib handles that. 86 */ 87static const char zlibcode[] = 88 "import sys, zlib; sys.stdout.write(zlib.decompress(sys.stdin.read()))"; 89 90static const char *zlib_args[] = { "python", "-c", zlibcode, NULL }; 91 92static int 93zlibcmp(const unsigned char *buf) 94{ 95 unsigned short x = 1; 96 unsigned char *s = (unsigned char *)&x; 97 98 if ((buf[0] & 0xf) != 8 || (buf[0] & 0x80) != 0) 99 return 0; 100 if (s[0] != 1) /* endianness test */ 101 x = buf[0] | (buf[1] << 8); 102 else 103 x = buf[1] | (buf[0] << 8); 104 if (x % 31) 105 return 0; 106 return 1; 107} 108#endif 109 110#define gzip_flags "-cd" 111#define lrzip_flags "-do" 112#define lzip_flags gzip_flags 113 114static const char *gzip_args[] = { 115 "gzip", gzip_flags, NULL 116}; 117static const char *uncompress_args[] = { 118 "uncompress", "-c", NULL 119}; 120static const char *bzip2_args[] = { 121 "bzip2", "-cd", NULL 122}; 123static const char *lzip_args[] = { 124 "lzip", lzip_flags, NULL 125}; 126static const char *xz_args[] = { 127 "xz", "-cd", NULL 128}; 129static const char *lrzip_args[] = { 130 "lrzip", lrzip_flags, NULL 131}; 132static const char *lz4_args[] = { 133 "lz4", "-cd", NULL 134}; 135 136private const struct { 137 const void *magic; 138 size_t maglen; 139 const char **argv; 140} compr[] = { 141 { "\037\235", 2, gzip_args }, /* compressed */ 142 /* Uncompress can get stuck; so use gzip first if we have it 143 * Idea from Damien Clark, thanks! */ 144 { "\037\235", 2, uncompress_args }, /* compressed */ 145 { "\037\213", 2, gzip_args }, /* gzipped */ 146 { "\037\236", 2, gzip_args }, /* frozen */ 147 { "\037\240", 2, gzip_args }, /* SCO LZH */ 148 /* the standard pack utilities do not accept standard input */ 149 { "\037\036", 2, gzip_args }, /* packed */ 150 { "PK\3\4", 4, gzip_args }, /* pkzipped, */ 151 /* ...only first file examined */ 152 { "BZh", 3, bzip2_args }, /* bzip2-ed */ 153 { "LZIP", 4, lzip_args }, /* lzip-ed */ 154 { "\3757zXZ\0", 6, xz_args }, /* XZ Utils */ 155 { "LRZI", 4, lrzip_args }, /* LRZIP */ 156 { "\004\"M\030",4, lz4_args }, /* LZ4 */ 157#ifdef ZLIBSUPPORT 158 { zlibcmp, 0, zlib_args }, /* zlib */ 159#endif 160}; 161 162#define OKDATA 0 163#define NODATA 1 164#define ERRDATA 2 165 166private ssize_t swrite(int, const void *, size_t); 167#if HAVE_FORK 168private size_t ncompr = sizeof(compr) / sizeof(compr[0]); 169private int uncompressbuf(int, size_t, size_t, const unsigned char *, 170 unsigned char **, size_t *); 171#ifdef BUILTIN_DECOMPRESS 172private int uncompresszlib(const unsigned char *, unsigned char **, size_t, 173 size_t *, int); 174private int uncompressgzipped(const unsigned char *, unsigned char **, size_t, 175 size_t *); 176#endif 177static int makeerror(unsigned char **, size_t *, const char *, ...) 178 __attribute__((__format__(__printf__, 3, 4))); 179private const char *methodname(size_t); 180 181protected int 182file_zmagic(struct magic_set *ms, int fd, const char *name, 183 const unsigned char *buf, size_t nbytes) 184{ 185 unsigned char *newbuf = NULL; 186 size_t i, nsz; 187 char *rbuf; 188 file_pushbuf_t *pb; 189 int urv, prv, rv = 0; 190 int mime = ms->flags & MAGIC_MIME; 191#ifdef HAVE_SIGNAL_H 192 sig_t osigpipe; 193#endif 194 195 if ((ms->flags & MAGIC_COMPRESS) == 0) 196 return 0; 197 198#ifdef HAVE_SIGNAL_H 199 osigpipe = signal(SIGPIPE, SIG_IGN); 200#endif 201 for (i = 0; i < ncompr; i++) { 202 int zm; 203 if (nbytes < compr[i].maglen) 204 continue; 205#ifdef ZLIBSUPPORT 206 if (compr[i].maglen == 0) 207 zm = (CAST(int (*)(const unsigned char *), 208 CCAST(void *, compr[i].magic)))(buf); 209 else 210#endif 211 zm = memcmp(buf, compr[i].magic, compr[i].maglen) == 0; 212 213 if (!zm) 214 continue; 215 nsz = nbytes; 216 urv = uncompressbuf(fd, ms->bytes_max, i, buf, &newbuf, &nsz); 217 DPRINTF("uncompressbuf = %d, %s, %zu\n", urv, (char *)newbuf, 218 nsz); 219 switch (urv) { 220 case OKDATA: 221 case ERRDATA: 222 223 ms->flags &= ~MAGIC_COMPRESS; 224 if (urv == ERRDATA) 225 prv = file_printf(ms, "%s ERROR: %s", 226 methodname(i), newbuf); 227 else 228 prv = file_buffer(ms, -1, name, newbuf, nsz); 229 if (prv == -1) 230 goto error; 231 rv = 1; 232 if ((ms->flags & MAGIC_COMPRESS_TRANSP) != 0) 233 goto out; 234 if (mime != MAGIC_MIME && mime != 0) 235 goto out; 236 if ((file_printf(ms, 237 mime ? " compressed-encoding=" : " (")) == -1) 238 goto error; 239 if ((pb = file_push_buffer(ms)) == NULL) 240 goto error; 241 /* 242 * XXX: If file_buffer fails here, we overwrite 243 * the compressed text. FIXME. 244 */ 245 if (file_buffer(ms, -1, NULL, buf, nbytes) == -1) 246 goto error; 247 if ((rbuf = file_pop_buffer(ms, pb)) != NULL) { 248 if (file_printf(ms, "%s", rbuf) == -1) { 249 free(rbuf); 250 goto error; 251 } 252 free(rbuf); 253 } 254 if (!mime && file_printf(ms, ")") == -1) 255 goto error; 256 /*FALLTHROUGH*/ 257 case NODATA: 258 break; 259 default: 260 abort(); 261 /*NOTREACHED*/ 262 error: 263 rv = -1; 264 break; 265 } 266 } 267out: 268 DPRINTF("rv = %d\n", rv); 269 270#ifdef HAVE_SIGNAL_H 271 (void)signal(SIGPIPE, osigpipe); 272#endif 273 free(newbuf); 274 ms->flags |= MAGIC_COMPRESS; 275 DPRINTF("Zmagic returns %d\n", rv); 276 return rv; 277} 278#endif 279/* 280 * `safe' write for sockets and pipes. 281 */ 282private ssize_t 283swrite(int fd, const void *buf, size_t n) 284{ 285 ssize_t rv; 286 size_t rn = n; 287 288 do 289 switch (rv = write(fd, buf, n)) { 290 case -1: 291 if (errno == EINTR) 292 continue; 293 return -1; 294 default: 295 n -= rv; 296 buf = CAST(const char *, buf) + rv; 297 break; 298 } 299 while (n > 0); 300 return rn; 301} 302 303 304/* 305 * `safe' read for sockets and pipes. 306 */ 307protected ssize_t 308sread(int fd, void *buf, size_t n, int canbepipe __attribute__((__unused__))) 309{ 310 ssize_t rv; 311#ifdef FIONREAD 312 int t = 0; 313#endif 314 size_t rn = n; 315 316 if (fd == STDIN_FILENO) 317 goto nocheck; 318 319#ifdef FIONREAD 320 if (canbepipe && (ioctl(fd, FIONREAD, &t) == -1 || t == 0)) { 321#ifdef FD_ZERO 322 ssize_t cnt; 323 for (cnt = 0;; cnt++) { 324 fd_set check; 325 struct timeval tout = {0, 100 * 1000}; 326 int selrv; 327 328 FD_ZERO(&check); 329 FD_SET(fd, &check); 330 331 /* 332 * Avoid soft deadlock: do not read if there 333 * is nothing to read from sockets and pipes. 334 */ 335 selrv = select(fd + 1, &check, NULL, NULL, &tout); 336 if (selrv == -1) { 337 if (errno == EINTR || errno == EAGAIN) 338 continue; 339 } else if (selrv == 0 && cnt >= 5) { 340 return 0; 341 } else 342 break; 343 } 344#endif 345 (void)ioctl(fd, FIONREAD, &t); 346 } 347 348 if (t > 0 && (size_t)t < n) { 349 n = t; 350 rn = n; 351 } 352#endif 353 354nocheck: 355 do 356 switch ((rv = read(fd, buf, n))) { 357 case -1: 358 if (errno == EINTR) 359 continue; 360 return -1; 361 case 0: 362 return rn - n; 363 default: 364 n -= rv; 365 buf = ((char *)buf) + rv; 366 break; 367 } 368 while (n > 0); 369 return rn; 370} 371 372protected int 373file_pipe2file(struct magic_set *ms, int fd, const void *startbuf, 374 size_t nbytes) 375{ 376 char buf[4096]; 377 ssize_t r; 378 int tfd; 379 380 (void)strlcpy(buf, "/tmp/file.XXXXXX", sizeof buf); 381#ifndef HAVE_MKSTEMP 382 { 383 char *ptr = mktemp(buf); 384 tfd = open(ptr, O_RDWR|O_TRUNC|O_EXCL|O_CREAT, 0600); 385 r = errno; 386 (void)unlink(ptr); 387 errno = r; 388 } 389#else 390 { 391 int te; 392 tfd = mkstemp(buf); 393 te = errno; 394 (void)unlink(buf); 395 errno = te; 396 } 397#endif 398 if (tfd == -1) { 399 file_error(ms, errno, 400 "cannot create temporary file for pipe copy"); 401 return -1; 402 } 403 404 if (swrite(tfd, startbuf, nbytes) != (ssize_t)nbytes) 405 r = 1; 406 else { 407 while ((r = sread(fd, buf, sizeof(buf), 1)) > 0) 408 if (swrite(tfd, buf, (size_t)r) != r) 409 break; 410 } 411 412 switch (r) { 413 case -1: 414 file_error(ms, errno, "error copying from pipe to temp file"); 415 return -1; 416 case 0: 417 break; 418 default: 419 file_error(ms, errno, "error while writing to temp file"); 420 return -1; 421 } 422 423 /* 424 * We duplicate the file descriptor, because fclose on a 425 * tmpfile will delete the file, but any open descriptors 426 * can still access the phantom inode. 427 */ 428 if ((fd = dup2(tfd, fd)) == -1) { 429 file_error(ms, errno, "could not dup descriptor for temp file"); 430 return -1; 431 } 432 (void)close(tfd); 433 if (lseek(fd, (off_t)0, SEEK_SET) == (off_t)-1) { 434 file_badseek(ms); 435 return -1; 436 } 437 return fd; 438} 439#if HAVE_FORK 440#ifdef BUILTIN_DECOMPRESS 441 442#define FHCRC (1 << 1) 443#define FEXTRA (1 << 2) 444#define FNAME (1 << 3) 445#define FCOMMENT (1 << 4) 446 447 448private int 449uncompressgzipped(const unsigned char *old, unsigned char **newch, 450 size_t bytes_max, size_t *n) 451{ 452 unsigned char flg = old[3]; 453 size_t data_start = 10; 454 455 if (flg & FEXTRA) { 456 if (data_start + 1 >= *n) 457 goto err; 458 data_start += 2 + old[data_start] + old[data_start + 1] * 256; 459 } 460 if (flg & FNAME) { 461 while(data_start < *n && old[data_start]) 462 data_start++; 463 data_start++; 464 } 465 if (flg & FCOMMENT) { 466 while(data_start < *n && old[data_start]) 467 data_start++; 468 data_start++; 469 } 470 if (flg & FHCRC) 471 data_start += 2; 472 473 if (data_start >= *n) 474 goto err; 475 476 *n -= data_start; 477 old += data_start; 478 return uncompresszlib(old, newch, bytes_max, n, 0); 479err: 480 return makeerror(newch, n, "File too short"); 481} 482 483private int 484uncompresszlib(const unsigned char *old, unsigned char **newch, 485 size_t bytes_max, size_t *n, int zlib) 486{ 487 int rc; 488 z_stream z; 489 490 if ((*newch = CAST(unsigned char *, malloc(bytes_max + 1))) == NULL) 491 return makeerror(newch, n, "No buffer, %s", strerror(errno)); 492 493 z.next_in = CCAST(Bytef *, old); 494 z.avail_in = CAST(uint32_t, *n); 495 z.next_out = *newch; 496 z.avail_out = bytes_max; 497 z.zalloc = Z_NULL; 498 z.zfree = Z_NULL; 499 z.opaque = Z_NULL; 500 501 /* LINTED bug in header macro */ 502 rc = zlib ? inflateInit(&z) : inflateInit2(&z, -15); 503 if (rc != Z_OK) 504 goto err; 505 506 rc = inflate(&z, Z_SYNC_FLUSH); 507 if (rc != Z_OK && rc != Z_STREAM_END) 508 goto err; 509 510 *n = (size_t)z.total_out; 511 rc = inflateEnd(&z); 512 if (rc != Z_OK) 513 goto err; 514 515 /* let's keep the nul-terminate tradition */ 516 (*newch)[*n] = '\0'; 517 518 return OKDATA; 519err: 520 strlcpy((char *)*newch, z.msg, bytes_max); 521 *n = strlen((char *)*newch); 522 return ERRDATA; 523} 524#endif 525 526static int 527makeerror(unsigned char **buf, size_t *len, const char *fmt, ...) 528{ 529 char *msg; 530 va_list ap; 531 int rv; 532 533 va_start(ap, fmt); 534 rv = vasprintf(&msg, fmt, ap); 535 va_end(ap); 536 if (rv < 0) { 537 *buf = NULL; 538 *len = 0; 539 return NODATA; 540 } 541 *buf = (unsigned char *)msg; 542 *len = strlen(msg); 543 return ERRDATA; 544} 545 546static void 547closefd(int *fd, size_t i) 548{ 549 if (fd[i] == -1) 550 return; 551 (void) close(fd[i]); 552 fd[i] = -1; 553} 554 555static void 556closep(int *fd) 557{ 558 size_t i; 559 for (i = 0; i < 2; i++) 560 closefd(fd, i); 561} 562 563static void 564copydesc(int i, int *fd) 565{ 566 int j = fd[i == STDIN_FILENO ? 0 : 1]; 567 if (j == i) 568 return; 569 if (dup2(j, i) == -1) { 570 DPRINTF("dup(%d, %d) failed (%s)\n", j, i, strerror(errno)); 571 exit(1); 572 } 573 closep(fd); 574} 575 576static void 577writechild(int fdp[3][2], const void *old, size_t n) 578{ 579 int status; 580 581 closefd(fdp[STDIN_FILENO], 0); 582 /* 583 * fork again, to avoid blocking because both 584 * pipes filled 585 */ 586 switch (fork()) { 587 case 0: /* child */ 588 closefd(fdp[STDOUT_FILENO], 0); 589 if (swrite(fdp[STDIN_FILENO][1], old, n) != (ssize_t)n) { 590 DPRINTF("Write failed (%s)\n", strerror(errno)); 591 exit(1); 592 } 593 exit(0); 594 /*NOTREACHED*/ 595 596 case -1: 597 DPRINTF("Fork failed (%s)\n", strerror(errno)); 598 exit(1); 599 /*NOTREACHED*/ 600 601 default: /* parent */ 602 if (wait(&status) == -1) { 603 DPRINTF("Wait failed (%s)\n", strerror(errno)); 604 exit(1); 605 } 606 DPRINTF("Grandchild wait return %#x\n", status); 607 } 608 closefd(fdp[STDIN_FILENO], 1); 609} 610 611static ssize_t 612filter_error(unsigned char *ubuf, ssize_t n) 613{ 614 char *p; 615 char *buf; 616 617 ubuf[n] = '\0'; 618 buf = (char *)ubuf; 619 while (isspace((unsigned char)*buf)) 620 buf++; 621 DPRINTF("Filter error[[[%s]]]\n", buf); 622 if ((p = strchr((char *)buf, '\n')) != NULL) 623 *p = '\0'; 624 if ((p = strchr((char *)buf, ';')) != NULL) 625 *p = '\0'; 626 if ((p = strrchr((char *)buf, ':')) != NULL) { 627 ++p; 628 while (isspace((unsigned char)*p)) 629 p++; 630 n = strlen(p); 631 memmove(ubuf, p, n + 1); 632 } 633 DPRINTF("Filter error after[[[%s]]]\n", (char *)ubuf); 634 if (islower(*ubuf)) 635 *ubuf = toupper(*ubuf); 636 return n; 637} 638 639private const char * 640methodname(size_t method) 641{ 642#ifdef BUILTIN_DECOMPRESS 643 /* FIXME: This doesn't cope with bzip2 */ 644 if (method == 2 || compr[method].maglen == 0) 645 return "zlib"; 646#endif 647 return compr[method].argv[0]; 648} 649 650private int 651uncompressbuf(int fd, size_t bytes_max, size_t method, const unsigned char *old, 652 unsigned char **newch, size_t* n) 653{ 654 int fdp[3][2]; 655 int status, rv; 656 size_t i; 657 ssize_t r; 658 659#ifdef BUILTIN_DECOMPRESS 660 /* FIXME: This doesn't cope with bzip2 */ 661 if (method == 2) 662 return uncompressgzipped(old, newch, bytes_max, n); 663 if (compr[method].maglen == 0) 664 return uncompresszlib(old, newch, bytes_max, n, 1); 665#endif 666 (void)fflush(stdout); 667 (void)fflush(stderr); 668 669 for (i = 0; i < __arraycount(fdp); i++) 670 fdp[i][0] = fdp[i][1] = -1; 671 672 if ((fd == -1 && pipe(fdp[STDIN_FILENO]) == -1) || 673 pipe(fdp[STDOUT_FILENO]) == -1 || pipe(fdp[STDERR_FILENO]) == -1) { 674 closep(fdp[STDIN_FILENO]); 675 closep(fdp[STDOUT_FILENO]); 676 return makeerror(newch, n, "Cannot create pipe, %s", 677 strerror(errno)); 678 } 679 switch (fork()) { 680 case 0: /* child */ 681 if (fd != -1) { 682 fdp[STDIN_FILENO][0] = fd; 683 (void) lseek(fd, (off_t)0, SEEK_SET); 684 } 685 686 for (i = 0; i < __arraycount(fdp); i++) 687 copydesc(i, fdp[i]); 688 689 (void)execvp(compr[method].argv[0], 690 (char *const *)(intptr_t)compr[method].argv); 691 dprintf(STDERR_FILENO, "exec `%s' failed, %s", 692 compr[method].argv[0], strerror(errno)); 693 exit(1); 694 /*NOTREACHED*/ 695 case -1: 696 return makeerror(newch, n, "Cannot fork, %s", 697 strerror(errno)); 698 699 default: /* parent */ 700 for (i = 1; i < __arraycount(fdp); i++) 701 closefd(fdp[i], 1); 702 703 /* Write the buffer data to the child, if we don't have fd */ 704 if (fd == -1) 705 writechild(fdp, old, *n); 706 707 *newch = CAST(unsigned char *, malloc(bytes_max + 1)); 708 if (*newch == NULL) { 709 rv = makeerror(newch, n, "No buffer, %s", 710 strerror(errno)); 711 goto err; 712 } 713 rv = OKDATA; 714 if ((r = sread(fdp[STDOUT_FILENO][0], *newch, bytes_max, 0)) > 0) 715 break; 716 DPRINTF("Read stdout failed %d (%s)\n", fdp[STDOUT_FILENO][0], 717 r != -1 ? strerror(errno) : "no data"); 718 719 rv = ERRDATA; 720 if (r == 0 && 721 (r = sread(fdp[STDERR_FILENO][0], *newch, bytes_max, 0)) > 0) 722 { 723 r = filter_error(*newch, r); 724 break; 725 } 726 free(*newch); 727 if (r == 0) 728 rv = makeerror(newch, n, "Read failed, %s", 729 strerror(errno)); 730 else 731 rv = makeerror(newch, n, "No data"); 732 goto err; 733 } 734 735 *n = r; 736 /* NUL terminate, as every buffer is handled here. */ 737 (*newch)[*n] = '\0'; 738err: 739 closefd(fdp[STDIN_FILENO], 1); 740 closefd(fdp[STDOUT_FILENO], 0); 741 closefd(fdp[STDERR_FILENO], 0); 742 if (wait(&status) == -1) { 743 free(*newch); 744 rv = makeerror(newch, n, "Wait failed, %s", strerror(errno)); 745 DPRINTF("Child wait return %#x\n", status); 746 } else if (!WIFEXITED(status)) { 747 DPRINTF("Child not exited (0x%x)\n", status); 748 } else if (WEXITSTATUS(status) != 0) { 749 DPRINTF("Child exited (0x%d)\n", WEXITSTATUS(status)); 750 } 751 752 closefd(fdp[STDIN_FILENO], 0); 753 DPRINTF("Returning %p n=%zu rv=%d\n", *newch, *n, rv); 754 755 return rv; 756} 757#endif 758