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[apple_cmds.git] / file_cmds / gzip / gzip.c
1 /* $NetBSD: gzip.c,v 1.109 2015/10/27 07:36:18 mrg Exp $ */
2
3 /*-
4 * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, 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 ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * 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
30 #include <sys/cdefs.h>
31 #ifndef lint
32 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006\
33 Matthew R. Green. All rights reserved.");
34 __FBSDID("$FreeBSD: head/usr.bin/gzip/gzip.c 290073 2015-10-27 21:26:05Z delphij $");
35 #endif /* not lint */
36
37 /*
38 * gzip.c -- GPL free gzip using zlib.
39 *
40 * RFC 1950 covers the zlib format
41 * RFC 1951 covers the deflate format
42 * RFC 1952 covers the gzip format
43 *
44 * TODO:
45 * - use mmap where possible
46 * - make bzip2/compress -v/-t/-l support work as well as possible
47 */
48
49 #include <sys/param.h>
50 #include <sys/stat.h>
51 #include <sys/time.h>
52
53 #include <inttypes.h>
54 #include <unistd.h>
55 #include <stdio.h>
56 #include <string.h>
57 #include <stdlib.h>
58 #include <err.h>
59 #include <errno.h>
60 #include <fcntl.h>
61 #include <zlib.h>
62 #include <fts.h>
63 #include <libgen.h>
64 #include <stdarg.h>
65 #include <getopt.h>
66 #include <time.h>
67
68 #ifdef __APPLE__
69 #include <sys/attr.h>
70 #include <copyfile.h>
71 #include <get_compat.h>
72 int futimens(int fd, const struct timespec times[2]);
73 #endif /* __APPLE__ */
74
75 /* what type of file are we dealing with */
76 enum filetype {
77 FT_GZIP,
78 #ifndef NO_BZIP2_SUPPORT
79 FT_BZIP2,
80 #endif
81 #ifndef NO_COMPRESS_SUPPORT
82 FT_Z,
83 #endif
84 #ifndef NO_PACK_SUPPORT
85 FT_PACK,
86 #endif
87 #ifndef NO_XZ_SUPPORT
88 FT_XZ,
89 #endif
90 FT_LAST,
91 FT_UNKNOWN
92 };
93
94 #ifndef NO_BZIP2_SUPPORT
95 #include <bzlib.h>
96
97 #define BZ2_SUFFIX ".bz2"
98 #define BZIP2_MAGIC "\102\132\150"
99 #endif
100
101 #ifndef NO_COMPRESS_SUPPORT
102 #define Z_SUFFIX ".Z"
103 #define Z_MAGIC "\037\235"
104 #endif
105
106 #ifndef NO_PACK_SUPPORT
107 #define PACK_MAGIC "\037\036"
108 #endif
109
110 #ifndef NO_XZ_SUPPORT
111 #include <lzma.h>
112 #define XZ_SUFFIX ".xz"
113 #define XZ_MAGIC "\3757zXZ"
114 #endif
115
116 #define GZ_SUFFIX ".gz"
117
118 #define BUFLEN (64 * 1024)
119
120 #define GZIP_MAGIC0 0x1F
121 #define GZIP_MAGIC1 0x8B
122 #define GZIP_OMAGIC1 0x9E
123
124 #define GZIP_TIMESTAMP (off_t)4
125 #define GZIP_ORIGNAME (off_t)10
126
127 #define HEAD_CRC 0x02
128 #define EXTRA_FIELD 0x04
129 #define ORIG_NAME 0x08
130 #define COMMENT 0x10
131
132 #define OS_CODE 3 /* Unix */
133
134 typedef struct {
135 const char *zipped;
136 int ziplen;
137 const char *normal; /* for unzip - must not be longer than zipped */
138 } suffixes_t;
139 static suffixes_t suffixes[] = {
140 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
141 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
142 #ifndef SMALL
143 SUFFIX(GZ_SUFFIX, ""),
144 SUFFIX(".z", ""),
145 SUFFIX("-gz", ""),
146 SUFFIX("-z", ""),
147 SUFFIX("_z", ""),
148 SUFFIX(".taz", ".tar"),
149 SUFFIX(".tgz", ".tar"),
150 #ifndef NO_BZIP2_SUPPORT
151 SUFFIX(BZ2_SUFFIX, ""),
152 SUFFIX(".tbz", ".tar"),
153 SUFFIX(".tbz2", ".tar"),
154 #endif
155 #ifndef NO_COMPRESS_SUPPORT
156 SUFFIX(Z_SUFFIX, ""),
157 #endif
158 #ifndef NO_XZ_SUPPORT
159 SUFFIX(XZ_SUFFIX, ""),
160 #endif
161 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
162 #endif /* SMALL */
163 #undef SUFFIX
164 };
165 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
166 #define SUFFIX_MAXLEN 30
167
168 #ifdef __APPLE__
169 static const char gzip_version[] = "Apple gzip " GZIP_APPLE_VERSION;
170 #else
171 static const char gzip_version[] = "FreeBSD gzip 20150413";
172 #endif
173
174 #ifndef SMALL
175 static const char gzip_copyright[] = \
176 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n"
177 " All rights reserved.\n"
178 "\n"
179 " Redistribution and use in source and binary forms, with or without\n"
180 " modification, are permitted provided that the following conditions\n"
181 " are met:\n"
182 " 1. Redistributions of source code must retain the above copyright\n"
183 " notice, this list of conditions and the following disclaimer.\n"
184 " 2. Redistributions in binary form must reproduce the above copyright\n"
185 " notice, this list of conditions and the following disclaimer in the\n"
186 " documentation and/or other materials provided with the distribution.\n"
187 "\n"
188 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
189 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n"
190 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n"
191 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n"
192 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n"
193 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
194 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n"
195 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n"
196 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n"
197 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n"
198 " SUCH DAMAGE.";
199 #endif
200
201 static int cflag; /* stdout mode */
202 static int dflag; /* decompress mode */
203 static int lflag; /* list mode */
204 static int numflag = 6; /* gzip -1..-9 value */
205
206 #ifndef SMALL
207 static int fflag; /* force mode */
208 static int kflag; /* don't delete input files */
209 static int nflag; /* don't save name/timestamp */
210 static int Nflag; /* don't restore name/timestamp */
211 static int qflag; /* quiet mode */
212 static int rflag; /* recursive mode */
213 static int tflag; /* test */
214 static int vflag; /* verbose mode */
215 static const char *remove_file = NULL; /* file to be removed upon SIGINT */
216 #else
217 #define qflag 0
218 #define tflag 0
219 #endif
220
221 static int exit_value = 0; /* exit value */
222
223 static char *infile; /* name of file coming in */
224
225 #ifdef __APPLE__
226 static bool zcat;
227 #endif
228
229 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2;
230 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
231 !defined(NO_XZ_SUPPORT)
232 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2;
233 #endif
234 static void maybe_warn(const char *fmt, ...) __printflike(1, 2);
235 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2);
236 static enum filetype file_gettype(u_char *);
237 #ifdef SMALL
238 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
239 #endif
240 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
241 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
242 static off_t file_compress(char *, char *, size_t);
243 static off_t file_uncompress(char *, char *, size_t);
244 static void handle_pathname(char *);
245 static void handle_file(char *, struct stat *);
246 static void handle_stdin(void);
247 static void handle_stdout(void);
248 static void print_ratio(off_t, off_t, FILE *);
249 static void print_list(int fd, off_t, const char *, time_t);
250 static void usage(void) __dead2;
251 static void display_version(void) __dead2;
252 #ifndef SMALL
253 static void display_license(void);
254 static void sigint_handler(int);
255 #endif
256 static const suffixes_t *check_suffix(char *, int);
257 static ssize_t read_retry(int, void *, size_t);
258
259 #ifdef SMALL
260 #define unlink_input(f, sb) unlink(f)
261 #else
262 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd);
263 static void prepend_gzip(char *, int *, char ***);
264 static void handle_dir(char *);
265 static void print_verbage(const char *, const char *, off_t, off_t);
266 static void print_test(const char *, int);
267 static void copymodes(int fd, const struct stat *, const char *file);
268 static int check_outfile(const char *outfile);
269 #endif
270
271 #ifndef NO_BZIP2_SUPPORT
272 static off_t unbzip2(int, int, char *, size_t, off_t *);
273 #endif
274
275 #ifndef NO_COMPRESS_SUPPORT
276 static FILE *zdopen(int);
277 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
278 #endif
279
280 #ifndef NO_PACK_SUPPORT
281 static off_t unpack(int, int, char *, size_t, off_t *);
282 #endif
283
284 #ifndef NO_XZ_SUPPORT
285 static off_t unxz(int, int, char *, size_t, off_t *);
286 #endif
287
288 #ifdef SMALL
289 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
290 #else
291 static const struct option longopts[] = {
292 { "stdout", no_argument, 0, 'c' },
293 { "to-stdout", no_argument, 0, 'c' },
294 { "decompress", no_argument, 0, 'd' },
295 { "uncompress", no_argument, 0, 'd' },
296 { "force", no_argument, 0, 'f' },
297 { "help", no_argument, 0, 'h' },
298 { "keep", no_argument, 0, 'k' },
299 { "list", no_argument, 0, 'l' },
300 { "no-name", no_argument, 0, 'n' },
301 { "name", no_argument, 0, 'N' },
302 { "quiet", no_argument, 0, 'q' },
303 { "recursive", no_argument, 0, 'r' },
304 { "suffix", required_argument, 0, 'S' },
305 { "test", no_argument, 0, 't' },
306 { "verbose", no_argument, 0, 'v' },
307 { "version", no_argument, 0, 'V' },
308 { "fast", no_argument, 0, '1' },
309 { "best", no_argument, 0, '9' },
310 { "ascii", no_argument, 0, 'a' },
311 { "license", no_argument, 0, 'L' },
312 { NULL, no_argument, 0, 0 },
313 };
314 #endif
315
316 int
317 main(int argc, char **argv)
318 {
319 const char *progname = getprogname();
320 #ifndef SMALL
321 char *gzip;
322 int len;
323 #endif
324 int ch;
325
326 #ifndef SMALL
327 if ((gzip = getenv("GZIP")) != NULL)
328 prepend_gzip(gzip, &argc, &argv);
329 signal(SIGINT, sigint_handler);
330 #endif
331
332 /*
333 * XXX
334 * handle being called `gunzip', `zcat' and `gzcat'
335 */
336 if (strcmp(progname, "gunzip") == 0)
337 dflag = 1;
338 else if (strcmp(progname, "zcat") == 0 ||
339 strcmp(progname, "gzcat") == 0)
340 dflag = cflag = 1;
341
342 #ifdef __APPLE__
343 if (strcmp(progname, "zcat") == 0) {
344 zcat = true;
345 }
346 #endif
347
348 #ifdef SMALL
349 #define OPT_LIST "123456789cdhlV"
350 #else
351 #define OPT_LIST "123456789acdfhklLNnqrS:tVv"
352 #endif
353
354 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
355 switch (ch) {
356 case '1': case '2': case '3':
357 case '4': case '5': case '6':
358 case '7': case '8': case '9':
359 numflag = ch - '0';
360 break;
361 case 'c':
362 cflag = 1;
363 break;
364 case 'd':
365 dflag = 1;
366 break;
367 case 'l':
368 lflag = 1;
369 dflag = 1;
370 break;
371 case 'V':
372 display_version();
373 /* NOTREACHED */
374 #ifndef SMALL
375 case 'a':
376 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname);
377 break;
378 case 'f':
379 fflag = 1;
380 break;
381 case 'k':
382 kflag = 1;
383 break;
384 case 'L':
385 display_license();
386 /* NOT REACHED */
387 case 'N':
388 nflag = 0;
389 Nflag = 1;
390 break;
391 case 'n':
392 nflag = 1;
393 Nflag = 0;
394 break;
395 case 'q':
396 qflag = 1;
397 break;
398 case 'r':
399 rflag = 1;
400 break;
401 case 'S':
402 len = strlen(optarg);
403 if (len != 0) {
404 if (len > SUFFIX_MAXLEN)
405 errx(1, "incorrect suffix: '%s': too long", optarg);
406 suffixes[0].zipped = optarg;
407 suffixes[0].ziplen = len;
408 } else {
409 suffixes[NUM_SUFFIXES - 1].zipped = "";
410 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
411 }
412 break;
413 case 't':
414 cflag = 1;
415 tflag = 1;
416 dflag = 1;
417 break;
418 case 'v':
419 vflag = 1;
420 break;
421 #endif
422 default:
423 usage();
424 /* NOTREACHED */
425 }
426 }
427 argv += optind;
428 argc -= optind;
429
430 if (argc == 0) {
431 if (dflag) /* stdin mode */
432 handle_stdin();
433 else /* stdout mode */
434 handle_stdout();
435 } else {
436 do {
437 handle_pathname(argv[0]);
438 } while (*++argv);
439 }
440 #ifndef SMALL
441 if (qflag == 0 && lflag && argc > 1)
442 print_list(-1, 0, "(totals)", 0);
443 #endif
444 exit(exit_value);
445 }
446
447 /* maybe print a warning */
448 void
449 maybe_warn(const char *fmt, ...)
450 {
451 va_list ap;
452
453 if (qflag == 0) {
454 va_start(ap, fmt);
455 vwarn(fmt, ap);
456 va_end(ap);
457 }
458 if (exit_value == 0)
459 exit_value = 1;
460 }
461
462 /* ... without an errno. */
463 void
464 maybe_warnx(const char *fmt, ...)
465 {
466 va_list ap;
467
468 if (qflag == 0) {
469 va_start(ap, fmt);
470 vwarnx(fmt, ap);
471 va_end(ap);
472 }
473 if (exit_value == 0)
474 exit_value = 1;
475 }
476
477 /* maybe print an error */
478 void
479 maybe_err(const char *fmt, ...)
480 {
481 va_list ap;
482
483 if (qflag == 0) {
484 va_start(ap, fmt);
485 vwarn(fmt, ap);
486 va_end(ap);
487 }
488 exit(2);
489 }
490
491 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
492 !defined(NO_XZ_SUPPORT)
493 /* ... without an errno. */
494 void
495 maybe_errx(const char *fmt, ...)
496 {
497 va_list ap;
498
499 if (qflag == 0) {
500 va_start(ap, fmt);
501 vwarnx(fmt, ap);
502 va_end(ap);
503 }
504 exit(2);
505 }
506 #endif
507
508 #ifndef SMALL
509 /* split up $GZIP and prepend it to the argument list */
510 static void
511 prepend_gzip(char *gzip, int *argc, char ***argv)
512 {
513 char *s, **nargv, **ac;
514 int nenvarg = 0, i;
515
516 /* scan how many arguments there are */
517 for (s = gzip;;) {
518 while (*s == ' ' || *s == '\t')
519 s++;
520 if (*s == 0)
521 goto count_done;
522 nenvarg++;
523 while (*s != ' ' && *s != '\t')
524 if (*s++ == 0)
525 goto count_done;
526 }
527 count_done:
528 /* punt early */
529 if (nenvarg == 0)
530 return;
531
532 *argc += nenvarg;
533 ac = *argv;
534
535 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
536 if (nargv == NULL)
537 maybe_err("malloc");
538
539 /* stash this away */
540 *argv = nargv;
541
542 /* copy the program name first */
543 i = 0;
544 nargv[i++] = *(ac++);
545
546 s = gzip;
547 for (;;) {
548 /* Skip whitespaces. */
549 while (*s == ' ' || *s == '\t')
550 s++;
551 if (*s == 0) {
552 goto copy_done;
553 }
554 nargv[i++] = s;
555 /* Find the end of this argument. */
556 while (*s != ' ' && *s != '\t')
557 if (*s++ == 0)
558 /* Argument followed by NUL. */
559 goto copy_done;
560 /* copy any unterminated args */
561 nargv[i-1] = strndup(nargv[i-1], s-nargv[i-1]);
562 if (nargv[i-1] == NULL)
563 maybe_err("strndup");
564 s++;
565 }
566 copy_done:
567
568 /* copy the original arguments and a NULL */
569 while (*ac)
570 nargv[i++] = *(ac++);
571 nargv[i] = NULL;
572 }
573 #endif
574
575 /* compress input to output. Return bytes read, -1 on error */
576 static off_t
577 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
578 {
579 z_stream z;
580 char *outbufp, *inbufp;
581 off_t in_tot = 0, out_tot = 0;
582 ssize_t in_size;
583 int i, error;
584 uLong crc;
585 #ifdef SMALL
586 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
587 0, 0, 0, 0,
588 0, OS_CODE };
589 #endif
590
591 outbufp = malloc(BUFLEN);
592 inbufp = malloc(BUFLEN);
593 if (outbufp == NULL || inbufp == NULL) {
594 maybe_err("malloc failed");
595 goto out;
596 }
597
598 memset(&z, 0, sizeof z);
599 z.zalloc = Z_NULL;
600 z.zfree = Z_NULL;
601 z.opaque = 0;
602
603 #ifdef SMALL
604 memcpy(outbufp, header, sizeof header);
605 i = sizeof header;
606 #else
607 if (nflag != 0) {
608 mtime = 0;
609 origname = "";
610 }
611
612 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
613 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
614 *origname ? ORIG_NAME : 0,
615 mtime & 0xff,
616 (mtime >> 8) & 0xff,
617 (mtime >> 16) & 0xff,
618 (mtime >> 24) & 0xff,
619 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
620 OS_CODE, origname);
621 if (i >= BUFLEN)
622 /* this need PATH_MAX > BUFLEN ... */
623 maybe_err("snprintf");
624 if (*origname)
625 i++;
626 #endif
627
628 z.next_out = (unsigned char *)outbufp + i;
629 z.avail_out = BUFLEN - i;
630
631 error = deflateInit2(&z, numflag, Z_DEFLATED,
632 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
633 if (error != Z_OK) {
634 maybe_warnx("deflateInit2 failed");
635 in_tot = -1;
636 goto out;
637 }
638
639 crc = crc32(0L, Z_NULL, 0);
640 for (;;) {
641 if (z.avail_out == 0) {
642 if (write(out, outbufp, BUFLEN) != BUFLEN) {
643 maybe_warn("write");
644 out_tot = -1;
645 goto out;
646 }
647
648 out_tot += BUFLEN;
649 z.next_out = (unsigned char *)outbufp;
650 z.avail_out = BUFLEN;
651 }
652
653 if (z.avail_in == 0) {
654 in_size = read(in, inbufp, BUFLEN);
655 if (in_size < 0) {
656 maybe_warn("read");
657 in_tot = -1;
658 goto out;
659 }
660 if (in_size == 0)
661 break;
662
663 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
664 in_tot += in_size;
665 z.next_in = (unsigned char *)inbufp;
666 z.avail_in = in_size;
667 }
668
669 error = deflate(&z, Z_NO_FLUSH);
670 if (error != Z_OK && error != Z_STREAM_END) {
671 maybe_warnx("deflate failed");
672 in_tot = -1;
673 goto out;
674 }
675 }
676
677 /* clean up */
678 for (;;) {
679 size_t len;
680 ssize_t w;
681
682 error = deflate(&z, Z_FINISH);
683 if (error != Z_OK && error != Z_STREAM_END) {
684 maybe_warnx("deflate failed");
685 in_tot = -1;
686 goto out;
687 }
688
689 len = (char *)z.next_out - outbufp;
690
691 w = write(out, outbufp, len);
692 if (w == -1 || (size_t)w != len) {
693 maybe_warn("write");
694 out_tot = -1;
695 goto out;
696 }
697 out_tot += len;
698 z.next_out = (unsigned char *)outbufp;
699 z.avail_out = BUFLEN;
700
701 if (error == Z_STREAM_END)
702 break;
703 }
704
705 if (deflateEnd(&z) != Z_OK) {
706 maybe_warnx("deflateEnd failed");
707 in_tot = -1;
708 goto out;
709 }
710
711 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
712 (int)crc & 0xff,
713 (int)(crc >> 8) & 0xff,
714 (int)(crc >> 16) & 0xff,
715 (int)(crc >> 24) & 0xff,
716 (int)in_tot & 0xff,
717 (int)(in_tot >> 8) & 0xff,
718 (int)(in_tot >> 16) & 0xff,
719 (int)(in_tot >> 24) & 0xff);
720 if (i != 8)
721 maybe_err("snprintf");
722 if (write(out, outbufp, i) != i) {
723 maybe_warn("write");
724 in_tot = -1;
725 } else
726 out_tot += i;
727
728 out:
729 if (inbufp != NULL)
730 free(inbufp);
731 if (outbufp != NULL)
732 free(outbufp);
733 if (gsizep)
734 *gsizep = out_tot;
735 return in_tot;
736 }
737
738 /*
739 * uncompress input to output then close the input. return the
740 * uncompressed size written, and put the compressed sized read
741 * into `*gsizep'.
742 */
743 static off_t
744 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
745 const char *filename)
746 {
747 z_stream z;
748 char *outbufp, *inbufp;
749 off_t out_tot = -1, in_tot = 0;
750 uint32_t out_sub_tot = 0;
751 enum {
752 GZSTATE_MAGIC0,
753 GZSTATE_MAGIC1,
754 GZSTATE_METHOD,
755 GZSTATE_FLAGS,
756 GZSTATE_SKIPPING,
757 GZSTATE_EXTRA,
758 GZSTATE_EXTRA2,
759 GZSTATE_EXTRA3,
760 GZSTATE_ORIGNAME,
761 GZSTATE_COMMENT,
762 GZSTATE_HEAD_CRC1,
763 GZSTATE_HEAD_CRC2,
764 GZSTATE_INIT,
765 GZSTATE_READ,
766 GZSTATE_CRC,
767 GZSTATE_LEN,
768 } state = GZSTATE_MAGIC0;
769 int flags = 0, skip_count = 0;
770 int error = Z_STREAM_ERROR, done_reading = 0;
771 uLong crc = 0;
772 ssize_t wr;
773 int needmore = 0;
774
775 #define ADVANCE() { z.next_in++; z.avail_in--; }
776
777 if ((outbufp = malloc(BUFLEN)) == NULL) {
778 maybe_err("malloc failed");
779 goto out2;
780 }
781 if ((inbufp = malloc(BUFLEN)) == NULL) {
782 maybe_err("malloc failed");
783 goto out1;
784 }
785
786 memset(&z, 0, sizeof z);
787 z.avail_in = prelen;
788 z.next_in = (unsigned char *)pre;
789 z.avail_out = BUFLEN;
790 z.next_out = (unsigned char *)outbufp;
791 z.zalloc = NULL;
792 z.zfree = NULL;
793 z.opaque = 0;
794
795 in_tot = prelen;
796 out_tot = 0;
797
798 for (;;) {
799 if ((z.avail_in == 0 || needmore) && done_reading == 0) {
800 ssize_t in_size;
801
802 if (z.avail_in > 0) {
803 memmove(inbufp, z.next_in, z.avail_in);
804 }
805 z.next_in = (unsigned char *)inbufp;
806 in_size = read(in, z.next_in + z.avail_in,
807 BUFLEN - z.avail_in);
808
809 if (in_size == -1) {
810 maybe_warn("failed to read stdin");
811 goto stop_and_fail;
812 } else if (in_size == 0) {
813 done_reading = 1;
814 }
815
816 z.avail_in += in_size;
817 needmore = 0;
818
819 in_tot += in_size;
820 }
821 if (z.avail_in == 0) {
822 if (done_reading && state != GZSTATE_MAGIC0) {
823 maybe_warnx("%s: unexpected end of file",
824 filename);
825 goto stop_and_fail;
826 }
827 goto stop;
828 }
829 switch (state) {
830 case GZSTATE_MAGIC0:
831 if (*z.next_in != GZIP_MAGIC0) {
832 if (in_tot > 0) {
833 maybe_warnx("%s: trailing garbage "
834 "ignored", filename);
835 exit_value = 2;
836 goto stop;
837 }
838 maybe_warnx("input not gziped (MAGIC0)");
839 goto stop_and_fail;
840 }
841 ADVANCE();
842 state++;
843 out_sub_tot = 0;
844 crc = crc32(0L, Z_NULL, 0);
845 break;
846
847 case GZSTATE_MAGIC1:
848 if (*z.next_in != GZIP_MAGIC1 &&
849 *z.next_in != GZIP_OMAGIC1) {
850 maybe_warnx("input not gziped (MAGIC1)");
851 goto stop_and_fail;
852 }
853 ADVANCE();
854 state++;
855 break;
856
857 case GZSTATE_METHOD:
858 if (*z.next_in != Z_DEFLATED) {
859 maybe_warnx("unknown compression method");
860 goto stop_and_fail;
861 }
862 ADVANCE();
863 state++;
864 break;
865
866 case GZSTATE_FLAGS:
867 flags = *z.next_in;
868 ADVANCE();
869 skip_count = 6;
870 state++;
871 break;
872
873 case GZSTATE_SKIPPING:
874 if (skip_count > 0) {
875 skip_count--;
876 ADVANCE();
877 } else
878 state++;
879 break;
880
881 case GZSTATE_EXTRA:
882 if ((flags & EXTRA_FIELD) == 0) {
883 state = GZSTATE_ORIGNAME;
884 break;
885 }
886 skip_count = *z.next_in;
887 ADVANCE();
888 state++;
889 break;
890
891 case GZSTATE_EXTRA2:
892 skip_count |= ((*z.next_in) << 8);
893 ADVANCE();
894 state++;
895 break;
896
897 case GZSTATE_EXTRA3:
898 if (skip_count > 0) {
899 skip_count--;
900 ADVANCE();
901 } else
902 state++;
903 break;
904
905 case GZSTATE_ORIGNAME:
906 if ((flags & ORIG_NAME) == 0) {
907 state++;
908 break;
909 }
910 if (*z.next_in == 0)
911 state++;
912 ADVANCE();
913 break;
914
915 case GZSTATE_COMMENT:
916 if ((flags & COMMENT) == 0) {
917 state++;
918 break;
919 }
920 if (*z.next_in == 0)
921 state++;
922 ADVANCE();
923 break;
924
925 case GZSTATE_HEAD_CRC1:
926 if (flags & HEAD_CRC)
927 skip_count = 2;
928 else
929 skip_count = 0;
930 state++;
931 break;
932
933 case GZSTATE_HEAD_CRC2:
934 if (skip_count > 0) {
935 skip_count--;
936 ADVANCE();
937 } else
938 state++;
939 break;
940
941 case GZSTATE_INIT:
942 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
943 maybe_warnx("failed to inflateInit");
944 goto stop_and_fail;
945 }
946 state++;
947 break;
948
949 case GZSTATE_READ:
950 error = inflate(&z, Z_FINISH);
951 switch (error) {
952 /* Z_BUF_ERROR goes with Z_FINISH... */
953 case Z_BUF_ERROR:
954 if (z.avail_out > 0 && !done_reading)
955 continue;
956
957 case Z_STREAM_END:
958 case Z_OK:
959 break;
960
961 case Z_NEED_DICT:
962 maybe_warnx("Z_NEED_DICT error");
963 goto stop_and_fail;
964 case Z_DATA_ERROR:
965 maybe_warnx("data stream error");
966 goto stop_and_fail;
967 case Z_STREAM_ERROR:
968 maybe_warnx("internal stream error");
969 goto stop_and_fail;
970 case Z_MEM_ERROR:
971 maybe_warnx("memory allocation error");
972 goto stop_and_fail;
973
974 default:
975 maybe_warn("unknown error from inflate(): %d",
976 error);
977 }
978 wr = BUFLEN - z.avail_out;
979
980 if (wr != 0) {
981 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
982 if (
983 #ifndef SMALL
984 /* don't write anything with -t */
985 tflag == 0 &&
986 #endif
987 write(out, outbufp, wr) != wr) {
988 maybe_warn("error writing to output");
989 goto stop_and_fail;
990 }
991
992 out_tot += wr;
993 out_sub_tot += wr;
994 }
995
996 if (error == Z_STREAM_END) {
997 inflateEnd(&z);
998 state++;
999 }
1000
1001 z.next_out = (unsigned char *)outbufp;
1002 z.avail_out = BUFLEN;
1003
1004 break;
1005 case GZSTATE_CRC:
1006 {
1007 uLong origcrc;
1008
1009 if (z.avail_in < 4) {
1010 if (!done_reading) {
1011 needmore = 1;
1012 continue;
1013 }
1014 maybe_warnx("truncated input");
1015 goto stop_and_fail;
1016 }
1017 origcrc = ((unsigned)z.next_in[0] & 0xff) |
1018 ((unsigned)z.next_in[1] & 0xff) << 8 |
1019 ((unsigned)z.next_in[2] & 0xff) << 16 |
1020 ((unsigned)z.next_in[3] & 0xff) << 24;
1021 if (origcrc != crc) {
1022 maybe_warnx("invalid compressed"
1023 " data--crc error");
1024 goto stop_and_fail;
1025 }
1026 }
1027
1028 z.avail_in -= 4;
1029 z.next_in += 4;
1030
1031 if (!z.avail_in && done_reading) {
1032 goto stop;
1033 }
1034 state++;
1035 break;
1036 case GZSTATE_LEN:
1037 {
1038 uLong origlen;
1039
1040 if (z.avail_in < 4) {
1041 if (!done_reading) {
1042 needmore = 1;
1043 continue;
1044 }
1045 maybe_warnx("truncated input");
1046 goto stop_and_fail;
1047 }
1048 origlen = ((unsigned)z.next_in[0] & 0xff) |
1049 ((unsigned)z.next_in[1] & 0xff) << 8 |
1050 ((unsigned)z.next_in[2] & 0xff) << 16 |
1051 ((unsigned)z.next_in[3] & 0xff) << 24;
1052
1053 if (origlen != out_sub_tot) {
1054 maybe_warnx("invalid compressed"
1055 " data--length error");
1056 goto stop_and_fail;
1057 }
1058 }
1059
1060 z.avail_in -= 4;
1061 z.next_in += 4;
1062
1063 if (error < 0) {
1064 maybe_warnx("decompression error");
1065 goto stop_and_fail;
1066 }
1067 state = GZSTATE_MAGIC0;
1068 break;
1069 }
1070 continue;
1071 stop_and_fail:
1072 out_tot = -1;
1073 stop:
1074 break;
1075 }
1076 if (state > GZSTATE_INIT)
1077 inflateEnd(&z);
1078
1079 free(inbufp);
1080 out1:
1081 free(outbufp);
1082 out2:
1083 if (gsizep)
1084 *gsizep = in_tot;
1085 return (out_tot);
1086 }
1087
1088 #ifndef SMALL
1089 /*
1090 * set the owner, mode, flags & utimes using the given file descriptor.
1091 * file is only used in possible warning messages.
1092 */
1093 static void
1094 copymodes(int fd, const struct stat *sbp, const char *file)
1095 {
1096 struct timespec times[2];
1097 struct stat sb;
1098
1099 /*
1100 * If we have no info on the input, give this file some
1101 * default values and return..
1102 */
1103 if (sbp == NULL) {
1104 mode_t mask = umask(022);
1105
1106 (void)fchmod(fd, DEFFILEMODE & ~mask);
1107 (void)umask(mask);
1108 return;
1109 }
1110 sb = *sbp;
1111
1112 /* if the chown fails, remove set-id bits as-per compress(1) */
1113 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) {
1114 if (errno != EPERM)
1115 maybe_warn("couldn't fchown: %s", file);
1116 sb.st_mode &= ~(S_ISUID|S_ISGID);
1117 }
1118
1119 /* we only allow set-id and the 9 normal permission bits */
1120 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1121 if (fchmod(fd, sb.st_mode) < 0)
1122 maybe_warn("couldn't fchmod: %s", file);
1123
1124 #ifdef __APPLE__
1125 times[0] = sb.st_atimespec;
1126 times[1] = sb.st_mtimespec;
1127 #else
1128 times[0] = sb.st_atim;
1129 times[1] = sb.st_mtim;
1130 #endif
1131 if (futimens(fd, times) < 0)
1132 maybe_warn("couldn't futimens: %s", file);
1133
1134 /* only try flags if they exist already */
1135 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0)
1136 maybe_warn("couldn't fchflags: %s", file);
1137 }
1138 #endif
1139
1140 /* what sort of file is this? */
1141 static enum filetype
1142 file_gettype(u_char *buf)
1143 {
1144
1145 if (buf[0] == GZIP_MAGIC0 &&
1146 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1147 return FT_GZIP;
1148 else
1149 #ifndef NO_BZIP2_SUPPORT
1150 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1151 buf[3] >= '0' && buf[3] <= '9')
1152 return FT_BZIP2;
1153 else
1154 #endif
1155 #ifndef NO_COMPRESS_SUPPORT
1156 if (memcmp(buf, Z_MAGIC, 2) == 0)
1157 return FT_Z;
1158 else
1159 #endif
1160 #ifndef NO_PACK_SUPPORT
1161 if (memcmp(buf, PACK_MAGIC, 2) == 0)
1162 return FT_PACK;
1163 else
1164 #endif
1165 #ifndef NO_XZ_SUPPORT
1166 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */
1167 return FT_XZ;
1168 else
1169 #endif
1170 return FT_UNKNOWN;
1171 }
1172
1173 #ifndef SMALL
1174 /* check the outfile is OK. */
1175 static int
1176 check_outfile(const char *outfile)
1177 {
1178 struct stat sb;
1179 int ok = 1;
1180
1181 if (lflag == 0 && stat(outfile, &sb) == 0) {
1182 if (fflag)
1183 unlink(outfile);
1184 else if (isatty(STDIN_FILENO)) {
1185 char ans[10] = { 'n', '\0' }; /* default */
1186
1187 fprintf(stderr, "%s already exists -- do you wish to "
1188 "overwrite (y or n)? " , outfile);
1189 (void)fgets(ans, sizeof(ans) - 1, stdin);
1190 if (ans[0] != 'y' && ans[0] != 'Y') {
1191 fprintf(stderr, "\tnot overwriting\n");
1192 ok = 0;
1193 } else
1194 unlink(outfile);
1195 } else {
1196 maybe_warnx("%s already exists -- skipping", outfile);
1197 ok = 0;
1198 }
1199 }
1200 return ok;
1201 }
1202
1203 static void
1204 unlink_input(const char *file, const struct stat *sb)
1205 {
1206 struct stat nsb;
1207
1208 if (kflag)
1209 return;
1210 bzero(&nsb, sizeof(nsb));
1211 if (stat(file, &nsb) != 0)
1212 /* Must be gone already */
1213 return;
1214 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1215 /* Definitely a different file */
1216 return;
1217 unlink(file);
1218 }
1219
1220 static void
1221 sigint_handler(int signo __unused)
1222 {
1223
1224 if (remove_file != NULL)
1225 unlink(remove_file);
1226 _exit(2);
1227 }
1228 #endif
1229
1230 static const suffixes_t *
1231 check_suffix(char *file, int xlate)
1232 {
1233 const suffixes_t *s;
1234 int len = strlen(file);
1235 char *sp;
1236
1237 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1238 /* if it doesn't fit in "a.suf", don't bother */
1239 if (s->ziplen >= len)
1240 continue;
1241 sp = file + len - s->ziplen;
1242 if (strcmp(s->zipped, sp) != 0)
1243 continue;
1244 if (xlate)
1245 strcpy(sp, s->normal);
1246 return s;
1247 }
1248 return NULL;
1249 }
1250
1251 #ifdef __APPLE__
1252 static void
1253 clear_type_and_creator(int fd)
1254 {
1255 struct attrlist alist;
1256 struct {
1257 u_int32_t length;
1258 char info[32];
1259 } abuf;
1260
1261 memset(&alist, 0, sizeof(alist));
1262 alist.bitmapcount = ATTR_BIT_MAP_COUNT;
1263 alist.commonattr = ATTR_CMN_FNDRINFO;
1264
1265 if (!fgetattrlist(fd, &alist, &abuf, sizeof(abuf), 0) && abuf.length == sizeof(abuf)) {
1266 memset(abuf.info, 0, 8);
1267 fsetattrlist(fd, &alist, abuf.info, sizeof(abuf.info), 0);
1268 }
1269 }
1270 #endif /* __APPLE__ */
1271
1272 /*
1273 * compress the given file: create a corresponding .gz file and remove the
1274 * original.
1275 */
1276 static off_t
1277 file_compress(char *file, char *outfile, size_t outsize)
1278 {
1279 int in;
1280 int out;
1281 off_t size, insize;
1282 #ifndef SMALL
1283 struct stat isb, osb;
1284 const suffixes_t *suff;
1285 #endif
1286
1287 in = open(file, O_RDONLY);
1288 if (in == -1) {
1289 maybe_warn("can't open %s", file);
1290 return (-1);
1291 }
1292
1293 #ifndef SMALL
1294 bzero(&isb, sizeof(isb));
1295 if (fstat(in, &isb) != 0) {
1296 maybe_warn("couldn't stat: %s", file);
1297 close(in);
1298 return (-1);
1299 }
1300 #endif
1301
1302 if (cflag == 0) {
1303 #ifndef SMALL
1304 if (isb.st_nlink > 1 && fflag == 0) {
1305 maybe_warnx("%s has %d other link%s -- skipping",
1306 file, isb.st_nlink - 1,
1307 (isb.st_nlink - 1) == 1 ? "" : "s");
1308 close(in);
1309 return (-1);
1310 }
1311
1312 if (fflag == 0 && (suff = check_suffix(file, 0)) &&
1313 suff->zipped[0] != 0) {
1314 maybe_warnx("%s already has %s suffix -- unchanged",
1315 file, suff->zipped);
1316 close(in);
1317 return (-1);
1318 }
1319 #endif
1320
1321 /* Add (usually) .gz to filename */
1322 if ((size_t)snprintf(outfile, outsize, "%s%s",
1323 file, suffixes[0].zipped) >= outsize)
1324 memcpy(outfile + outsize - suffixes[0].ziplen - 1,
1325 suffixes[0].zipped, suffixes[0].ziplen + 1);
1326
1327 #ifndef SMALL
1328 if (check_outfile(outfile) == 0) {
1329 close(in);
1330 return (-1);
1331 }
1332 #endif
1333 }
1334
1335 if (cflag == 0) {
1336 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1337 if (out == -1) {
1338 maybe_warn("could not create output: %s", outfile);
1339 fclose(stdin);
1340 return (-1);
1341 }
1342 #ifndef SMALL
1343 remove_file = outfile;
1344 #endif
1345 } else
1346 out = STDOUT_FILENO;
1347
1348 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1349
1350 #ifndef __APPLE__
1351 (void)close(in);
1352 #endif /* !__APPLE__ */
1353
1354 /*
1355 * If there was an error, insize will be -1.
1356 * If we compressed to stdout, just return the size.
1357 * Otherwise stat the file and check it is the correct size.
1358 * We only blow away the file if we can stat the output and it
1359 * has the expected size.
1360 */
1361 if (cflag != 0)
1362 return (insize == -1 ? -1 : size);
1363
1364 #ifndef SMALL
1365 if (fstat(out, &osb) != 0) {
1366 maybe_warn("couldn't stat: %s", outfile);
1367 goto bad_outfile;
1368 }
1369
1370 if (osb.st_size != size) {
1371 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting",
1372 outfile, (uintmax_t)osb.st_size, (uintmax_t)size);
1373 goto bad_outfile;
1374 }
1375
1376 #ifdef __APPLE__
1377 fcopyfile(in, out, 0, COPYFILE_ACL | COPYFILE_XATTR);
1378 clear_type_and_creator(out);
1379 #endif /* __APPLE__ */
1380 copymodes(out, &isb, outfile);
1381 remove_file = NULL;
1382 #endif
1383 #ifdef __APPLE__
1384 (void)close(in);
1385 #endif /* __APPLE__ */
1386 if (close(out) == -1)
1387 maybe_warn("couldn't close output");
1388
1389 /* output is good, ok to delete input */
1390 unlink_input(file, &isb);
1391 return (size);
1392
1393 #ifndef SMALL
1394 bad_outfile:
1395 if (close(out) == -1)
1396 maybe_warn("couldn't close output");
1397
1398 maybe_warnx("leaving original %s", file);
1399 unlink(outfile);
1400 return (size);
1401 #endif
1402 }
1403
1404 /* uncompress the given file and remove the original */
1405 static off_t
1406 file_uncompress(char *file, char *outfile, size_t outsize)
1407 {
1408 struct stat isb, osb;
1409 off_t size;
1410 ssize_t rbytes;
1411 unsigned char header1[4];
1412 enum filetype method;
1413 int fd, ofd, zfd = -1;
1414 #ifndef SMALL
1415 ssize_t rv;
1416 time_t timestamp = 0;
1417 char name[PATH_MAX + 1];
1418 #endif
1419
1420 /* gather the old name info */
1421
1422 fd = open(file, O_RDONLY);
1423 if (fd < 0) {
1424 maybe_warn("can't open %s", file);
1425 goto lose;
1426 }
1427
1428 strlcpy(outfile, file, outsize);
1429 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1430 maybe_warnx("%s: unknown suffix -- ignored", file);
1431 goto lose;
1432 }
1433
1434 rbytes = read(fd, header1, sizeof header1);
1435 if (rbytes != sizeof header1) {
1436 /* we don't want to fail here. */
1437 #ifndef SMALL
1438 if (fflag)
1439 goto lose;
1440 #endif
1441 if (rbytes == -1)
1442 maybe_warn("can't read %s", file);
1443 else
1444 goto unexpected_EOF;
1445 goto lose;
1446 }
1447
1448 method = file_gettype(header1);
1449 #ifndef SMALL
1450 if (fflag == 0 && method == FT_UNKNOWN) {
1451 maybe_warnx("%s: not in gzip format", file);
1452 goto lose;
1453 }
1454
1455 #endif
1456
1457 #ifndef SMALL
1458 if (method == FT_GZIP && Nflag) {
1459 unsigned char ts[4]; /* timestamp */
1460
1461 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
1462 if (rv >= 0 && rv < (ssize_t)(sizeof ts))
1463 goto unexpected_EOF;
1464 if (rv == -1) {
1465 if (!fflag)
1466 maybe_warn("can't read %s", file);
1467 goto lose;
1468 }
1469 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1470
1471 if (header1[3] & ORIG_NAME) {
1472 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
1473 if (rbytes < 0) {
1474 maybe_warn("can't read %s", file);
1475 goto lose;
1476 }
1477 if (name[0] != '\0') {
1478 char *dp, *nf;
1479
1480 /* Make sure that name is NUL-terminated */
1481 name[rbytes] = '\0';
1482
1483 /* strip saved directory name */
1484 nf = strrchr(name, '/');
1485 if (nf == NULL)
1486 nf = name;
1487 else
1488 nf++;
1489
1490 /* preserve original directory name */
1491 dp = strrchr(file, '/');
1492 if (dp == NULL)
1493 dp = file;
1494 else
1495 dp++;
1496 snprintf(outfile, outsize, "%.*s%.*s",
1497 (int) (dp - file),
1498 file, (int) rbytes, nf);
1499 }
1500 }
1501 }
1502 #endif
1503 lseek(fd, 0, SEEK_SET);
1504 bzero(&isb, sizeof(isb));
1505 if (cflag == 0 || lflag) {
1506 if (fstat(fd, &isb) != 0)
1507 goto lose;
1508 #ifndef SMALL
1509 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1510 maybe_warnx("%s has %d other links -- skipping",
1511 file, isb.st_nlink - 1);
1512 goto lose;
1513 }
1514 if (nflag == 0 && timestamp)
1515 isb.st_mtime = timestamp;
1516 if (check_outfile(outfile) == 0)
1517 goto lose;
1518 #endif
1519 }
1520
1521 if (cflag == 0 && lflag == 0) {
1522 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1523 if (zfd == STDOUT_FILENO) {
1524 /* We won't close STDOUT_FILENO later... */
1525 zfd = dup(zfd);
1526 close(STDOUT_FILENO);
1527 }
1528 if (zfd == -1) {
1529 maybe_warn("can't open %s", outfile);
1530 goto lose;
1531 }
1532 #ifndef SMALL
1533 remove_file = outfile;
1534 #endif
1535 } else
1536 zfd = STDOUT_FILENO;
1537
1538 switch (method) {
1539 #ifndef NO_BZIP2_SUPPORT
1540 case FT_BZIP2:
1541 /* XXX */
1542 if (lflag) {
1543 maybe_warnx("no -l with bzip2 files");
1544 goto lose;
1545 }
1546
1547 size = unbzip2(fd, zfd, NULL, 0, NULL);
1548 break;
1549 #endif
1550
1551 #ifndef NO_COMPRESS_SUPPORT
1552 case FT_Z: {
1553 FILE *in, *out;
1554
1555 /* XXX */
1556 if (lflag) {
1557 maybe_warnx("no -l with Lempel-Ziv files");
1558 goto lose;
1559 }
1560
1561 if ((in = zdopen(fd)) == NULL) {
1562 maybe_warn("zdopen for read: %s", file);
1563 goto lose;
1564 }
1565
1566 out = fdopen(dup(zfd), "w");
1567 if (out == NULL) {
1568 maybe_warn("fdopen for write: %s", outfile);
1569 fclose(in);
1570 goto lose;
1571 }
1572
1573 size = zuncompress(in, out, NULL, 0, NULL);
1574 /* need to fclose() if ferror() is true... */
1575 if (ferror(in) | fclose(in)) {
1576 maybe_warn("failed infile fclose");
1577 unlink(outfile);
1578 (void)fclose(out);
1579 }
1580 if (fclose(out) != 0) {
1581 maybe_warn("failed outfile fclose");
1582 unlink(outfile);
1583 goto lose;
1584 }
1585 break;
1586 }
1587 #endif
1588
1589 #ifndef NO_PACK_SUPPORT
1590 case FT_PACK:
1591 if (lflag) {
1592 maybe_warnx("no -l with packed files");
1593 goto lose;
1594 }
1595
1596 size = unpack(fd, zfd, NULL, 0, NULL);
1597 break;
1598 #endif
1599
1600 #ifndef NO_XZ_SUPPORT
1601 case FT_XZ:
1602 if (lflag) {
1603 maybe_warnx("no -l with xz files");
1604 goto lose;
1605 }
1606
1607 size = unxz(fd, zfd, NULL, 0, NULL);
1608 break;
1609 #endif
1610
1611 #ifndef SMALL
1612 case FT_UNKNOWN:
1613 if (lflag) {
1614 maybe_warnx("no -l for unknown filetypes");
1615 goto lose;
1616 }
1617 size = cat_fd(NULL, 0, NULL, fd);
1618 break;
1619 #endif
1620 default:
1621 if (lflag) {
1622 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1623 close(fd);
1624 return -1; /* XXX */
1625 }
1626
1627 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1628 break;
1629 }
1630
1631 if (close(fd) != 0)
1632 maybe_warn("couldn't close input");
1633 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1634 maybe_warn("couldn't close output");
1635
1636 if (size == -1) {
1637 if (cflag == 0)
1638 unlink(outfile);
1639 maybe_warnx("%s: uncompress failed", file);
1640 return -1;
1641 }
1642
1643 /* if testing, or we uncompressed to stdout, this is all we need */
1644 #ifndef SMALL
1645 if (tflag)
1646 return size;
1647 #endif
1648 /* if we are uncompressing to stdin, don't remove the file. */
1649 if (cflag)
1650 return size;
1651
1652 /*
1653 * if we create a file...
1654 */
1655 /*
1656 * if we can't stat the file don't remove the file.
1657 */
1658
1659 ofd = open(outfile, O_RDWR, 0);
1660 if (ofd == -1) {
1661 maybe_warn("couldn't open (leaving original): %s",
1662 outfile);
1663 return -1;
1664 }
1665 if (fstat(ofd, &osb) != 0) {
1666 maybe_warn("couldn't stat (leaving original): %s",
1667 outfile);
1668 close(ofd);
1669 return -1;
1670 }
1671 if (osb.st_size != size) {
1672 maybe_warnx("stat gave different size: %ju != %ju (leaving original)",
1673 (uintmax_t)size, (uintmax_t)osb.st_size);
1674 close(ofd);
1675 unlink(outfile);
1676 return -1;
1677 }
1678 #ifndef SMALL
1679 copymodes(ofd, &isb, outfile);
1680 remove_file = NULL;
1681 #endif
1682 close(ofd);
1683 unlink_input(file, &isb);
1684 return size;
1685
1686 unexpected_EOF:
1687 maybe_warnx("%s: unexpected end of file", file);
1688 lose:
1689 if (fd != -1)
1690 close(fd);
1691 if (zfd != -1 && zfd != STDOUT_FILENO)
1692 close(fd);
1693 return -1;
1694 }
1695
1696 #ifndef SMALL
1697 static off_t
1698 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd)
1699 {
1700 char buf[BUFLEN];
1701 off_t in_tot;
1702 ssize_t w;
1703
1704 in_tot = count;
1705 w = write(STDOUT_FILENO, prepend, count);
1706 if (w == -1 || (size_t)w != count) {
1707 maybe_warn("write to stdout");
1708 return -1;
1709 }
1710 for (;;) {
1711 ssize_t rv;
1712
1713 rv = read(fd, buf, sizeof buf);
1714 if (rv == 0)
1715 break;
1716 if (rv < 0) {
1717 maybe_warn("read from fd %d", fd);
1718 break;
1719 }
1720
1721 if (write(STDOUT_FILENO, buf, rv) != rv) {
1722 maybe_warn("write to stdout");
1723 break;
1724 }
1725 in_tot += rv;
1726 }
1727
1728 if (gsizep)
1729 *gsizep = in_tot;
1730 return (in_tot);
1731 }
1732 #endif
1733
1734 static void
1735 handle_stdin(void)
1736 {
1737 unsigned char header1[4];
1738 off_t usize, gsize;
1739 enum filetype method;
1740 ssize_t bytes_read;
1741 #ifndef NO_COMPRESS_SUPPORT
1742 FILE *in;
1743 #endif
1744
1745 #ifndef SMALL
1746 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1747 maybe_warnx("standard input is a terminal -- ignoring");
1748 return;
1749 }
1750 #endif
1751
1752 if (lflag) {
1753 struct stat isb;
1754
1755 /* XXX could read the whole file, etc. */
1756 if (fstat(STDIN_FILENO, &isb) < 0) {
1757 maybe_warn("fstat");
1758 return;
1759 }
1760 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1761 return;
1762 }
1763
1764 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
1765 if (bytes_read == -1) {
1766 maybe_warn("can't read stdin");
1767 return;
1768 } else if (bytes_read != sizeof(header1)) {
1769 maybe_warnx("(stdin): unexpected end of file");
1770 return;
1771 }
1772
1773 method = file_gettype(header1);
1774 switch (method) {
1775 default:
1776 #ifndef SMALL
1777 if (fflag == 0) {
1778 maybe_warnx("unknown compression format");
1779 return;
1780 }
1781 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1782 break;
1783 #endif
1784 case FT_GZIP:
1785 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1786 (char *)header1, sizeof header1, &gsize, "(stdin)");
1787 break;
1788 #ifndef NO_BZIP2_SUPPORT
1789 case FT_BZIP2:
1790 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1791 (char *)header1, sizeof header1, &gsize);
1792 break;
1793 #endif
1794 #ifndef NO_COMPRESS_SUPPORT
1795 case FT_Z:
1796 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1797 maybe_warnx("zopen of stdin");
1798 return;
1799 }
1800
1801 usize = zuncompress(in, stdout, (char *)header1,
1802 sizeof header1, &gsize);
1803 fclose(in);
1804 break;
1805 #endif
1806 #ifndef NO_PACK_SUPPORT
1807 case FT_PACK:
1808 usize = unpack(STDIN_FILENO, STDOUT_FILENO,
1809 (char *)header1, sizeof header1, &gsize);
1810 break;
1811 #endif
1812 #ifndef NO_XZ_SUPPORT
1813 case FT_XZ:
1814 usize = unxz(STDIN_FILENO, STDOUT_FILENO,
1815 (char *)header1, sizeof header1, &gsize);
1816 break;
1817 #endif
1818 }
1819
1820 #ifndef SMALL
1821 if (vflag && !tflag && usize != -1 && gsize != -1)
1822 print_verbage(NULL, NULL, usize, gsize);
1823 if (vflag && tflag)
1824 print_test("(stdin)", usize != -1);
1825 #endif
1826
1827 }
1828
1829 static void
1830 handle_stdout(void)
1831 {
1832 off_t gsize, usize;
1833 struct stat sb;
1834 time_t systime;
1835 uint32_t mtime;
1836 int ret;
1837
1838 #ifndef SMALL
1839 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1840 maybe_warnx("standard output is a terminal -- ignoring");
1841 return;
1842 }
1843 #endif
1844 /* If stdin is a file use its mtime, otherwise use current time */
1845 ret = fstat(STDIN_FILENO, &sb);
1846
1847 #ifndef SMALL
1848 if (ret < 0) {
1849 maybe_warn("Can't stat stdin");
1850 return;
1851 }
1852 #endif
1853
1854 if (S_ISREG(sb.st_mode))
1855 mtime = (uint32_t)sb.st_mtime;
1856 else {
1857 systime = time(NULL);
1858 #ifndef SMALL
1859 if (systime == -1) {
1860 maybe_warn("time");
1861 return;
1862 }
1863 #endif
1864 mtime = (uint32_t)systime;
1865 }
1866
1867 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
1868 #ifndef SMALL
1869 if (vflag && !tflag && usize != -1 && gsize != -1)
1870 print_verbage(NULL, NULL, usize, gsize);
1871 #endif
1872 }
1873
1874 /* do what is asked for, for the path name */
1875 static void
1876 handle_pathname(char *path)
1877 {
1878 char *opath = path, *s = NULL;
1879 ssize_t len;
1880 int slen;
1881 struct stat sb;
1882
1883 /* check for stdout/stdin */
1884 if (path[0] == '-' && path[1] == '\0') {
1885 if (dflag)
1886 handle_stdin();
1887 else
1888 handle_stdout();
1889 return;
1890 }
1891
1892 #ifdef __APPLE__
1893 if (zcat && COMPAT_MODE("bin/zcat", "Unix2003")) {
1894 char *suffix = strrchr(path, '.');
1895 if (suffix == NULL || strcmp(suffix, Z_SUFFIX) != 0) {
1896 len = strlen(path);
1897 slen = sizeof(Z_SUFFIX) - 1;
1898 s = malloc(len + slen + 1);
1899 memcpy(s, path, len);
1900 memcpy(s + len, Z_SUFFIX, slen + 1);
1901 path = s;
1902 }
1903 }
1904 #endif
1905
1906 retry:
1907 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 &&
1908 lstat(path, &sb) != 0)) {
1909 /* lets try <path>.gz if we're decompressing */
1910 if (dflag && s == NULL && errno == ENOENT) {
1911 len = strlen(path);
1912 slen = suffixes[0].ziplen;
1913 s = malloc(len + slen + 1);
1914 if (s == NULL)
1915 maybe_err("malloc");
1916 memcpy(s, path, len);
1917 memcpy(s + len, suffixes[0].zipped, slen + 1);
1918 path = s;
1919 goto retry;
1920 }
1921 #ifdef __APPLE__
1922 /* Include actual path for clarity. */
1923 maybe_warn("can't stat: %s (%s)", opath, path);
1924 #else
1925 maybe_warn("can't stat: %s", opath);
1926 #endif
1927 goto out;
1928 }
1929
1930 if (S_ISDIR(sb.st_mode)) {
1931 #ifndef SMALL
1932 if (rflag)
1933 handle_dir(path);
1934 else
1935 #endif
1936 maybe_warnx("%s is a directory", path);
1937 goto out;
1938 }
1939
1940 if (S_ISREG(sb.st_mode))
1941 handle_file(path, &sb);
1942 else
1943 maybe_warnx("%s is not a regular file", path);
1944
1945 out:
1946 if (s)
1947 free(s);
1948 }
1949
1950 /* compress/decompress a file */
1951 static void
1952 handle_file(char *file, struct stat *sbp)
1953 {
1954 off_t usize, gsize;
1955 char outfile[PATH_MAX];
1956
1957 infile = file;
1958 if (dflag) {
1959 usize = file_uncompress(file, outfile, sizeof(outfile));
1960 #ifndef SMALL
1961 if (vflag && tflag)
1962 print_test(file, usize != -1);
1963 #endif
1964 if (usize == -1)
1965 return;
1966 gsize = sbp->st_size;
1967 } else {
1968 gsize = file_compress(file, outfile, sizeof(outfile));
1969 if (gsize == -1)
1970 return;
1971 usize = sbp->st_size;
1972 }
1973
1974
1975 #ifndef SMALL
1976 if (vflag && !tflag)
1977 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1978 #endif
1979 }
1980
1981 #ifndef SMALL
1982 /* this is used with -r to recursively descend directories */
1983 static void
1984 handle_dir(char *dir)
1985 {
1986 char *path_argv[2];
1987 FTS *fts;
1988 FTSENT *entry;
1989
1990 path_argv[0] = dir;
1991 path_argv[1] = 0;
1992 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
1993 if (fts == NULL) {
1994 warn("couldn't fts_open %s", dir);
1995 return;
1996 }
1997
1998 while ((entry = fts_read(fts))) {
1999 switch(entry->fts_info) {
2000 case FTS_D:
2001 case FTS_DP:
2002 continue;
2003
2004 case FTS_DNR:
2005 case FTS_ERR:
2006 case FTS_NS:
2007 maybe_warn("%s", entry->fts_path);
2008 continue;
2009 case FTS_F:
2010 handle_file(entry->fts_path, entry->fts_statp);
2011 }
2012 }
2013 (void)fts_close(fts);
2014 }
2015 #endif
2016
2017 /* print a ratio - size reduction as a fraction of uncompressed size */
2018 static void
2019 print_ratio(off_t in, off_t out, FILE *where)
2020 {
2021 int percent10; /* 10 * percent */
2022 off_t diff;
2023 char buff[8];
2024 int len;
2025
2026 diff = in - out/2;
2027 if (diff <= 0)
2028 /*
2029 * Output is more than double size of input! print -99.9%
2030 * Quite possibly we've failed to get the original size.
2031 */
2032 percent10 = -999;
2033 else {
2034 /*
2035 * We only need 12 bits of result from the final division,
2036 * so reduce the values until a 32bit division will suffice.
2037 */
2038 while (in > 0x100000) {
2039 diff >>= 1;
2040 in >>= 1;
2041 }
2042 if (in != 0)
2043 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
2044 else
2045 percent10 = 0;
2046 }
2047
2048 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
2049 /* Move the '.' to before the last digit */
2050 buff[len - 1] = buff[len - 2];
2051 buff[len - 2] = '.';
2052 fprintf(where, "%5s%%", buff);
2053 }
2054
2055 #ifndef SMALL
2056 /* print compression statistics, and the new name (if there is one!) */
2057 static void
2058 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
2059 {
2060 if (file)
2061 fprintf(stderr, "%s:%s ", file,
2062 strlen(file) < 7 ? "\t\t" : "\t");
2063 print_ratio(usize, gsize, stderr);
2064 if (nfile)
2065 fprintf(stderr, " -- replaced with %s", nfile);
2066 fprintf(stderr, "\n");
2067 fflush(stderr);
2068 }
2069
2070 /* print test results */
2071 static void
2072 print_test(const char *file, int ok)
2073 {
2074
2075 if (exit_value == 0 && ok == 0)
2076 exit_value = 1;
2077 fprintf(stderr, "%s:%s %s\n", file,
2078 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
2079 fflush(stderr);
2080 }
2081 #endif
2082
2083 /* print a file's info ala --list */
2084 /* eg:
2085 compressed uncompressed ratio uncompressed_name
2086 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
2087 */
2088 static void
2089 print_list(int fd, off_t out, const char *outfile, time_t ts)
2090 {
2091 static int first = 1;
2092 #ifndef SMALL
2093 static off_t in_tot, out_tot;
2094 uint32_t crc = 0;
2095 #endif
2096 off_t in = 0, rv;
2097
2098 if (first) {
2099 #ifndef SMALL
2100 if (vflag)
2101 printf("method crc date time ");
2102 #endif
2103 if (qflag == 0)
2104 printf(" compressed uncompressed "
2105 "ratio uncompressed_name\n");
2106 }
2107 first = 0;
2108
2109 /* print totals? */
2110 #ifndef SMALL
2111 if (fd == -1) {
2112 in = in_tot;
2113 out = out_tot;
2114 } else
2115 #endif
2116 {
2117 /* read the last 4 bytes - this is the uncompressed size */
2118 rv = lseek(fd, (off_t)(-8), SEEK_END);
2119 if (rv != -1) {
2120 unsigned char buf[8];
2121 uint32_t usize;
2122
2123 rv = read(fd, (char *)buf, sizeof(buf));
2124 if (rv == -1)
2125 maybe_warn("read of uncompressed size");
2126 else if (rv != sizeof(buf))
2127 maybe_warnx("read of uncompressed size");
2128
2129 else {
2130 usize = buf[4] | buf[5] << 8 |
2131 buf[6] << 16 | buf[7] << 24;
2132 in = (off_t)usize;
2133 #ifndef SMALL
2134 crc = buf[0] | buf[1] << 8 |
2135 buf[2] << 16 | buf[3] << 24;
2136 #endif
2137 }
2138 }
2139 }
2140
2141 #ifndef SMALL
2142 if (vflag && fd == -1)
2143 printf(" ");
2144 else if (vflag) {
2145 char *date = ctime(&ts);
2146
2147 /* skip the day, 1/100th second, and year */
2148 date += 4;
2149 date[12] = 0;
2150 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
2151 }
2152 in_tot += in;
2153 out_tot += out;
2154 #else
2155 (void)&ts; /* XXX */
2156 #endif
2157 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
2158 print_ratio(in, out, stdout);
2159 printf(" %s\n", outfile);
2160 }
2161
2162 /* display the usage of NetBSD gzip */
2163 static void
2164 usage(void)
2165 {
2166
2167 fprintf(stderr, "%s\n", gzip_version);
2168 fprintf(stderr,
2169 #ifdef SMALL
2170 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n",
2171 #else
2172 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
2173 " -1 --fast fastest (worst) compression\n"
2174 " -2 .. -8 set compression level\n"
2175 " -9 --best best (slowest) compression\n"
2176 " -c --stdout write to stdout, keep original files\n"
2177 " --to-stdout\n"
2178 " -d --decompress uncompress files\n"
2179 " --uncompress\n"
2180 " -f --force force overwriting & compress links\n"
2181 " -h --help display this help\n"
2182 " -k --keep don't delete input files during operation\n"
2183 " -l --list list compressed file contents\n"
2184 " -N --name save or restore original file name and time stamp\n"
2185 " -n --no-name don't save original file name or time stamp\n"
2186 " -q --quiet output no warnings\n"
2187 " -r --recursive recursively compress files in directories\n"
2188 " -S .suf use suffix .suf instead of .gz\n"
2189 " --suffix .suf\n"
2190 " -t --test test compressed file\n"
2191 " -V --version display program version\n"
2192 " -v --verbose print extra statistics\n",
2193 #endif
2194 getprogname());
2195 exit(0);
2196 }
2197
2198 #ifndef SMALL
2199 /* display the license information of FreeBSD gzip */
2200 static void
2201 display_license(void)
2202 {
2203
2204 #ifdef __APPLE__
2205 fprintf(stderr, "%s (based on FreeBSD gzip 20150113)\n", gzip_version);
2206 #else
2207 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version);
2208 #endif
2209 fprintf(stderr, "%s\n", gzip_copyright);
2210 exit(0);
2211 }
2212 #endif
2213
2214 /* display the version of NetBSD gzip */
2215 static void
2216 display_version(void)
2217 {
2218
2219 fprintf(stderr, "%s\n", gzip_version);
2220 exit(0);
2221 }
2222
2223 #ifndef NO_BZIP2_SUPPORT
2224 #include "unbzip2.c"
2225 #endif
2226 #ifndef NO_COMPRESS_SUPPORT
2227 #include "zuncompress.c"
2228 #endif
2229 #ifndef NO_PACK_SUPPORT
2230 #include "unpack.c"
2231 #endif
2232 #ifndef NO_XZ_SUPPORT
2233 #include "unxz.c"
2234 #endif
2235
2236 static ssize_t
2237 read_retry(int fd, void *buf, size_t sz)
2238 {
2239 char *cp = buf;
2240 size_t left = MIN(sz, (size_t) SSIZE_MAX);
2241
2242 while (left > 0) {
2243 ssize_t ret;
2244
2245 ret = read(fd, cp, left);
2246 if (ret == -1) {
2247 return ret;
2248 } else if (ret == 0) {
2249 break; /* EOF */
2250 }
2251 cp += ret;
2252 left -= ret;
2253 }
2254
2255 return sz - left;
2256 }
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