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[netbsd-mini2440.git] / usr.bin / gzip / gzip.c
blob171e9f32a3b6946455d5697ec5d6e987d72c75ac
1 /* $NetBSD: gzip.c,v 1.96 2009/10/11 07:09:39 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 #include <sys/cdefs.h>
30 #ifndef lint
31 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006\
32 Matthew R. Green. All rights reserved.");
33 __RCSID("$NetBSD: gzip.c,v 1.96 2009/10/11 07:09:39 mrg Exp $");
34 #endif /* not lint */
35
36 /*
37 * gzip.c -- GPL free gzip using zlib.
38 *
39 * RFC 1950 covers the zlib format
40 * RFC 1951 covers the deflate format
41 * RFC 1952 covers the gzip format
42 *
43 * TODO:
44 * - use mmap where possible
45 * - handle some signals better (remove outfile?)
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 #ifndef PRIdOFF
69 #define PRIdOFF PRId64
70 #endif
71
72 /* what type of file are we dealing with */
73 enum filetype {
74 FT_GZIP,
75 #ifndef NO_BZIP2_SUPPORT
76 FT_BZIP2,
77 #endif
78 #ifndef NO_COMPRESS_SUPPORT
79 FT_Z,
80 #endif
81 #ifndef NO_PACK_SUPPORT
82 FT_PACK,
83 #endif
84 FT_LAST,
85 FT_UNKNOWN
86 };
87
88 #ifndef NO_BZIP2_SUPPORT
89 #include <bzlib.h>
90
91 #define BZ2_SUFFIX ".bz2"
92 #define BZIP2_MAGIC "\102\132\150"
93 #endif
94
95 #ifndef NO_COMPRESS_SUPPORT
96 #define Z_SUFFIX ".Z"
97 #define Z_MAGIC "\037\235"
98 #endif
99
100 #ifndef NO_PACK_SUPPORT
101 #define PACK_MAGIC "\037\036"
102 #endif
103
104 #define GZ_SUFFIX ".gz"
105
106 #define BUFLEN (64 * 1024)
107
108 #define GZIP_MAGIC0 0x1F
109 #define GZIP_MAGIC1 0x8B
110 #define GZIP_OMAGIC1 0x9E
111
112 #define GZIP_TIMESTAMP (off_t)4
113 #define GZIP_ORIGNAME (off_t)10
114
115 #define HEAD_CRC 0x02
116 #define EXTRA_FIELD 0x04
117 #define ORIG_NAME 0x08
118 #define COMMENT 0x10
119
120 #define OS_CODE 3 /* Unix */
121
122 typedef struct {
123 const char *zipped;
124 int ziplen;
125 const char *normal; /* for unzip - must not be longer than zipped */
126 } suffixes_t;
127 static suffixes_t suffixes[] = {
128 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
129 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
130 #ifndef SMALL
131 SUFFIX(GZ_SUFFIX, ""),
132 SUFFIX(".z", ""),
133 SUFFIX("-gz", ""),
134 SUFFIX("-z", ""),
135 SUFFIX("_z", ""),
136 SUFFIX(".taz", ".tar"),
137 SUFFIX(".tgz", ".tar"),
138 #ifndef NO_BZIP2_SUPPORT
139 SUFFIX(BZ2_SUFFIX, ""),
140 #endif
141 #ifndef NO_COMPRESS_SUPPORT
142 SUFFIX(Z_SUFFIX, ""),
143 #endif
144 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
145 #endif /* SMALL */
146 #undef SUFFIX
147 };
148 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
149 #define SUFFIX_MAXLEN 30
150
151 static const char gzip_version[] = "NetBSD gzip 20091011";
152
153 static int cflag; /* stdout mode */
154 static int dflag; /* decompress mode */
155 static int lflag; /* list mode */
156 static int numflag = 6; /* gzip -1..-9 value */
157
158 #ifndef SMALL
159 static int fflag; /* force mode */
160 static int nflag; /* don't save name/timestamp */
161 static int Nflag; /* don't restore name/timestamp */
162 static int qflag; /* quiet mode */
163 static int rflag; /* recursive mode */
164 static int tflag; /* test */
165 static int vflag; /* verbose mode */
166 #else
167 #define qflag 0
168 #define tflag 0
169 #endif
170
171 static int exit_value = 0; /* exit value */
172
173 static char *infile; /* name of file coming in */
174
175 static void maybe_err(const char *fmt, ...)
176 __attribute__((__format__(__printf__, 1, 2)));
177 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT)
178 static void maybe_errx(const char *fmt, ...)
179 __attribute__((__format__(__printf__, 1, 2)));
180 #endif
181 static void maybe_warn(const char *fmt, ...)
182 __attribute__((__format__(__printf__, 1, 2)));
183 static void maybe_warnx(const char *fmt, ...)
184 __attribute__((__format__(__printf__, 1, 2)));
185 static enum filetype file_gettype(u_char *);
186 #ifdef SMALL
187 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
188 #endif
189 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
190 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
191 static off_t file_compress(char *, char *, size_t);
192 static off_t file_uncompress(char *, char *, size_t);
193 static void handle_pathname(char *);
194 static void handle_file(char *, struct stat *);
195 static void handle_stdin(void);
196 static void handle_stdout(void);
197 static void print_ratio(off_t, off_t, FILE *);
198 static void print_list(int fd, off_t, const char *, time_t);
199 static void usage(void);
200 static void display_version(void);
201 static const suffixes_t *check_suffix(char *, int);
202 static ssize_t read_retry(int, void *, size_t);
203
204 #ifdef SMALL
205 #define unlink_input(f, sb) unlink(f)
206 #else
207 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd);
208 static void prepend_gzip(char *, int *, char ***);
209 static void handle_dir(char *);
210 static void print_verbage(const char *, const char *, off_t, off_t);
211 static void print_test(const char *, int);
212 static void copymodes(int fd, const struct stat *, const char *file);
213 static int check_outfile(const char *outfile);
214 #endif
215
216 #ifndef NO_BZIP2_SUPPORT
217 static off_t unbzip2(int, int, char *, size_t, off_t *);
218 #endif
219
220 #ifndef NO_COMPRESS_SUPPORT
221 static FILE *zdopen(int);
222 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
223 #endif
224
225 #ifndef NO_PACK_SUPPORT
226 static off_t unpack(int, int, char *, size_t, off_t *);
227 #endif
228
229 int main(int, char *p[]);
230
231 #ifdef SMALL
232 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
233 #else
234 static const struct option longopts[] = {
235 { "stdout", no_argument, 0, 'c' },
236 { "to-stdout", no_argument, 0, 'c' },
237 { "decompress", no_argument, 0, 'd' },
238 { "uncompress", no_argument, 0, 'd' },
239 { "force", no_argument, 0, 'f' },
240 { "help", no_argument, 0, 'h' },
241 { "list", no_argument, 0, 'l' },
242 { "no-name", no_argument, 0, 'n' },
243 { "name", no_argument, 0, 'N' },
244 { "quiet", no_argument, 0, 'q' },
245 { "recursive", no_argument, 0, 'r' },
246 { "suffix", required_argument, 0, 'S' },
247 { "test", no_argument, 0, 't' },
248 { "verbose", no_argument, 0, 'v' },
249 { "version", no_argument, 0, 'V' },
250 { "fast", no_argument, 0, '1' },
251 { "best", no_argument, 0, '9' },
252 #if 0
253 /*
254 * This is what else GNU gzip implements. --ascii isn't useful
255 * on NetBSD, and I don't care to have a --license.
256 */
257 { "ascii", no_argument, 0, 'a' },
258 { "license", no_argument, 0, 'L' },
259 #endif
260 { NULL, no_argument, 0, 0 },
261 };
262 #endif
263
264 int
265 main(int argc, char **argv)
266 {
267 const char *progname = getprogname();
268 #ifndef SMALL
269 char *gzip;
270 int len;
271 #endif
272 int ch;
273
274 /* XXX set up signals */
275
276 #ifndef SMALL
277 if ((gzip = getenv("GZIP")) != NULL)
278 prepend_gzip(gzip, &argc, &argv);
279 #endif
280
281 /*
282 * XXX
283 * handle being called `gunzip', `zcat' and `gzcat'
284 */
285 if (strcmp(progname, "gunzip") == 0)
286 dflag = 1;
287 else if (strcmp(progname, "zcat") == 0 ||
288 strcmp(progname, "gzcat") == 0)
289 dflag = cflag = 1;
290
291 #ifdef SMALL
292 #define OPT_LIST "123456789cdhltV"
293 #else
294 #define OPT_LIST "123456789cdfhlNnqrS:tVv"
295 #endif
296
297 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
298 switch (ch) {
299 case '1': case '2': case '3':
300 case '4': case '5': case '6':
301 case '7': case '8': case '9':
302 numflag = ch - '0';
303 break;
304 case 'c':
305 cflag = 1;
306 break;
307 case 'd':
308 dflag = 1;
309 break;
310 case 'l':
311 lflag = 1;
312 dflag = 1;
313 break;
314 case 'V':
315 display_version();
316 /* NOTREACHED */
317 #ifndef SMALL
318 case 'f':
319 fflag = 1;
320 break;
321 case 'N':
322 nflag = 0;
323 Nflag = 1;
324 break;
325 case 'n':
326 nflag = 1;
327 Nflag = 0;
328 break;
329 case 'q':
330 qflag = 1;
331 break;
332 case 'r':
333 rflag = 1;
334 break;
335 case 'S':
336 len = strlen(optarg);
337 if (len != 0) {
338 if (len > SUFFIX_MAXLEN)
339 errx(1, "incorrect suffix: '%s'", optarg);
340 suffixes[0].zipped = optarg;
341 suffixes[0].ziplen = len;
342 } else {
343 suffixes[NUM_SUFFIXES - 1].zipped = "";
344 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
345 }
346 break;
347 case 't':
348 cflag = 1;
349 tflag = 1;
350 dflag = 1;
351 break;
352 case 'v':
353 vflag = 1;
354 break;
355 #endif
356 default:
357 usage();
358 /* NOTREACHED */
359 }
360 }
361 argv += optind;
362 argc -= optind;
363
364 if (argc == 0) {
365 if (dflag) /* stdin mode */
366 handle_stdin();
367 else /* stdout mode */
368 handle_stdout();
369 } else {
370 do {
371 handle_pathname(argv[0]);
372 } while (*++argv);
373 }
374 #ifndef SMALL
375 if (qflag == 0 && lflag && argc > 1)
376 print_list(-1, 0, "(totals)", 0);
377 #endif
378 exit(exit_value);
379 }
380
381 /* maybe print a warning */
382 void
383 maybe_warn(const char *fmt, ...)
384 {
385 va_list ap;
386
387 if (qflag == 0) {
388 va_start(ap, fmt);
389 vwarn(fmt, ap);
390 va_end(ap);
391 }
392 if (exit_value == 0)
393 exit_value = 1;
394 }
395
396 /* ... without an errno. */
397 void
398 maybe_warnx(const char *fmt, ...)
399 {
400 va_list ap;
401
402 if (qflag == 0) {
403 va_start(ap, fmt);
404 vwarnx(fmt, ap);
405 va_end(ap);
406 }
407 if (exit_value == 0)
408 exit_value = 1;
409 }
410
411 /* maybe print an error */
412 void
413 maybe_err(const char *fmt, ...)
414 {
415 va_list ap;
416
417 if (qflag == 0) {
418 va_start(ap, fmt);
419 vwarn(fmt, ap);
420 va_end(ap);
421 }
422 exit(2);
423 }
424
425 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT)
426 /* ... without an errno. */
427 void
428 maybe_errx(const char *fmt, ...)
429 {
430 va_list ap;
431
432 if (qflag == 0) {
433 va_start(ap, fmt);
434 vwarnx(fmt, ap);
435 va_end(ap);
436 }
437 exit(2);
438 }
439 #endif
440
441 #ifndef SMALL
442 /* split up $GZIP and prepend it to the argument list */
443 static void
444 prepend_gzip(char *gzip, int *argc, char ***argv)
445 {
446 char *s, **nargv, **ac;
447 int nenvarg = 0, i;
448
449 /* scan how many arguments there are */
450 for (s = gzip;;) {
451 while (*s == ' ' || *s == '\t')
452 s++;
453 if (*s == 0)
454 goto count_done;
455 nenvarg++;
456 while (*s != ' ' && *s != '\t')
457 if (*s++ == 0)
458 goto count_done;
459 }
460 count_done:
461 /* punt early */
462 if (nenvarg == 0)
463 return;
464
465 *argc += nenvarg;
466 ac = *argv;
467
468 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
469 if (nargv == NULL)
470 maybe_err("malloc");
471
472 /* stash this away */
473 *argv = nargv;
474
475 /* copy the program name first */
476 i = 0;
477 nargv[i++] = *(ac++);
478
479 /* take a copy of $GZIP and add it to the array */
480 s = strdup(gzip);
481 if (s == NULL)
482 maybe_err("strdup");
483 for (;;) {
484 /* Skip whitespaces. */
485 while (*s == ' ' || *s == '\t')
486 s++;
487 if (*s == 0)
488 goto copy_done;
489 nargv[i++] = s;
490 /* Find the end of this argument. */
491 while (*s != ' ' && *s != '\t')
492 if (*s++ == 0)
493 /* Argument followed by NUL. */
494 goto copy_done;
495 /* Terminate by overwriting ' ' or '\t' with NUL. */
496 *s++ = 0;
497 }
498 copy_done:
499
500 /* copy the original arguments and a NULL */
501 while (*ac)
502 nargv[i++] = *(ac++);
503 nargv[i] = NULL;
504 }
505 #endif
506
507 /* compress input to output. Return bytes read, -1 on error */
508 static off_t
509 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
510 {
511 z_stream z;
512 char *outbufp, *inbufp;
513 off_t in_tot = 0, out_tot = 0;
514 ssize_t in_size;
515 int i, error;
516 uLong crc;
517 #ifdef SMALL
518 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
519 0, 0, 0, 0,
520 0, OS_CODE };
521 #endif
522
523 outbufp = malloc(BUFLEN);
524 inbufp = malloc(BUFLEN);
525 if (outbufp == NULL || inbufp == NULL) {
526 maybe_err("malloc failed");
527 goto out;
528 }
529
530 memset(&z, 0, sizeof z);
531 z.zalloc = Z_NULL;
532 z.zfree = Z_NULL;
533 z.opaque = 0;
534
535 #ifdef SMALL
536 memcpy(outbufp, header, sizeof header);
537 i = sizeof header;
538 #else
539 if (nflag != 0) {
540 mtime = 0;
541 origname = "";
542 }
543
544 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
545 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
546 *origname ? ORIG_NAME : 0,
547 mtime & 0xff,
548 (mtime >> 8) & 0xff,
549 (mtime >> 16) & 0xff,
550 (mtime >> 24) & 0xff,
551 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
552 OS_CODE, origname);
553 if (i >= BUFLEN)
554 /* this need PATH_MAX > BUFLEN ... */
555 maybe_err("snprintf");
556 if (*origname)
557 i++;
558 #endif
559
560 z.next_out = outbufp + i;
561 z.avail_out = BUFLEN - i;
562
563 error = deflateInit2(&z, numflag, Z_DEFLATED,
564 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
565 if (error != Z_OK) {
566 maybe_warnx("deflateInit2 failed");
567 in_tot = -1;
568 goto out;
569 }
570
571 crc = crc32(0L, Z_NULL, 0);
572 for (;;) {
573 if (z.avail_out == 0) {
574 if (write(out, outbufp, BUFLEN) != BUFLEN) {
575 maybe_warn("write");
576 out_tot = -1;
577 goto out;
578 }
579
580 out_tot += BUFLEN;
581 z.next_out = outbufp;
582 z.avail_out = BUFLEN;
583 }
584
585 if (z.avail_in == 0) {
586 in_size = read(in, inbufp, BUFLEN);
587 if (in_size < 0) {
588 maybe_warn("read");
589 in_tot = -1;
590 goto out;
591 }
592 if (in_size == 0)
593 break;
594
595 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
596 in_tot += in_size;
597 z.next_in = inbufp;
598 z.avail_in = in_size;
599 }
600
601 error = deflate(&z, Z_NO_FLUSH);
602 if (error != Z_OK && error != Z_STREAM_END) {
603 maybe_warnx("deflate failed");
604 in_tot = -1;
605 goto out;
606 }
607 }
608
609 /* clean up */
610 for (;;) {
611 size_t len;
612 ssize_t w;
613
614 error = deflate(&z, Z_FINISH);
615 if (error != Z_OK && error != Z_STREAM_END) {
616 maybe_warnx("deflate failed");
617 in_tot = -1;
618 goto out;
619 }
620
621 len = (char *)z.next_out - outbufp;
622
623 w = write(out, outbufp, len);
624 if (w == -1 || (size_t)w != len) {
625 maybe_warn("write");
626 out_tot = -1;
627 goto out;
628 }
629 out_tot += len;
630 z.next_out = outbufp;
631 z.avail_out = BUFLEN;
632
633 if (error == Z_STREAM_END)
634 break;
635 }
636
637 if (deflateEnd(&z) != Z_OK) {
638 maybe_warnx("deflateEnd failed");
639 in_tot = -1;
640 goto out;
641 }
642
643 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
644 (int)crc & 0xff,
645 (int)(crc >> 8) & 0xff,
646 (int)(crc >> 16) & 0xff,
647 (int)(crc >> 24) & 0xff,
648 (int)in_tot & 0xff,
649 (int)(in_tot >> 8) & 0xff,
650 (int)(in_tot >> 16) & 0xff,
651 (int)(in_tot >> 24) & 0xff);
652 if (i != 8)
653 maybe_err("snprintf");
654 #if 0
655 if (in_tot > 0xffffffff)
656 maybe_warn("input file size >= 4GB cannot be saved");
657 #endif
658 if (write(out, outbufp, i) != i) {
659 maybe_warn("write");
660 in_tot = -1;
661 } else
662 out_tot += i;
663
664 out:
665 if (inbufp != NULL)
666 free(inbufp);
667 if (outbufp != NULL)
668 free(outbufp);
669 if (gsizep)
670 *gsizep = out_tot;
671 return in_tot;
672 }
673
674 /*
675 * uncompress input to output then close the input. return the
676 * uncompressed size written, and put the compressed sized read
677 * into `*gsizep'.
678 */
679 static off_t
680 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
681 const char *filename)
682 {
683 z_stream z;
684 char *outbufp, *inbufp;
685 off_t out_tot = -1, in_tot = 0;
686 uint32_t out_sub_tot = 0;
687 enum {
688 GZSTATE_MAGIC0,
689 GZSTATE_MAGIC1,
690 GZSTATE_METHOD,
691 GZSTATE_FLAGS,
692 GZSTATE_SKIPPING,
693 GZSTATE_EXTRA,
694 GZSTATE_EXTRA2,
695 GZSTATE_EXTRA3,
696 GZSTATE_ORIGNAME,
697 GZSTATE_COMMENT,
698 GZSTATE_HEAD_CRC1,
699 GZSTATE_HEAD_CRC2,
700 GZSTATE_INIT,
701 GZSTATE_READ,
702 GZSTATE_CRC,
703 GZSTATE_LEN,
704 } state = GZSTATE_MAGIC0;
705 int flags = 0, skip_count = 0;
706 int error = Z_STREAM_ERROR, done_reading = 0;
707 uLong crc = 0;
708 ssize_t wr;
709 int needmore = 0;
710
711 #define ADVANCE() { z.next_in++; z.avail_in--; }
712
713 if ((outbufp = malloc(BUFLEN)) == NULL) {
714 maybe_err("malloc failed");
715 goto out2;
716 }
717 if ((inbufp = malloc(BUFLEN)) == NULL) {
718 maybe_err("malloc failed");
719 goto out1;
720 }
721
722 memset(&z, 0, sizeof z);
723 z.avail_in = prelen;
724 z.next_in = pre;
725 z.avail_out = BUFLEN;
726 z.next_out = outbufp;
727 z.zalloc = NULL;
728 z.zfree = NULL;
729 z.opaque = 0;
730
731 in_tot = prelen;
732 out_tot = 0;
733
734 for (;;) {
735 if ((z.avail_in == 0 || needmore) && done_reading == 0) {
736 ssize_t in_size;
737
738 if (z.avail_in > 0) {
739 memmove(inbufp, z.next_in, z.avail_in);
740 }
741 z.next_in = inbufp;
742 in_size = read(in, z.next_in + z.avail_in,
743 BUFLEN - z.avail_in);
744
745 if (in_size == -1) {
746 maybe_warn("failed to read stdin");
747 goto stop_and_fail;
748 } else if (in_size == 0) {
749 done_reading = 1;
750 }
751
752 z.avail_in += in_size;
753 needmore = 0;
754
755 in_tot += in_size;
756 }
757 if (z.avail_in == 0) {
758 if (done_reading && state != GZSTATE_MAGIC0) {
759 maybe_warnx("%s: unexpected end of file",
760 filename);
761 goto stop_and_fail;
762 }
763 goto stop;
764 }
765 switch (state) {
766 case GZSTATE_MAGIC0:
767 if (*z.next_in != GZIP_MAGIC0) {
768 if (in_tot > 0) {
769 maybe_warnx("%s: trailing garbage "
770 "ignored", filename);
771 goto stop;
772 }
773 maybe_warnx("input not gziped (MAGIC0)");
774 goto stop_and_fail;
775 }
776 ADVANCE();
777 state++;
778 out_sub_tot = 0;
779 crc = crc32(0L, Z_NULL, 0);
780 break;
781
782 case GZSTATE_MAGIC1:
783 if (*z.next_in != GZIP_MAGIC1 &&
784 *z.next_in != GZIP_OMAGIC1) {
785 maybe_warnx("input not gziped (MAGIC1)");
786 goto stop_and_fail;
787 }
788 ADVANCE();
789 state++;
790 break;
791
792 case GZSTATE_METHOD:
793 if (*z.next_in != Z_DEFLATED) {
794 maybe_warnx("unknown compression method");
795 goto stop_and_fail;
796 }
797 ADVANCE();
798 state++;
799 break;
800
801 case GZSTATE_FLAGS:
802 flags = *z.next_in;
803 ADVANCE();
804 skip_count = 6;
805 state++;
806 break;
807
808 case GZSTATE_SKIPPING:
809 if (skip_count > 0) {
810 skip_count--;
811 ADVANCE();
812 } else
813 state++;
814 break;
815
816 case GZSTATE_EXTRA:
817 if ((flags & EXTRA_FIELD) == 0) {
818 state = GZSTATE_ORIGNAME;
819 break;
820 }
821 skip_count = *z.next_in;
822 ADVANCE();
823 state++;
824 break;
825
826 case GZSTATE_EXTRA2:
827 skip_count |= ((*z.next_in) << 8);
828 ADVANCE();
829 state++;
830 break;
831
832 case GZSTATE_EXTRA3:
833 if (skip_count > 0) {
834 skip_count--;
835 ADVANCE();
836 } else
837 state++;
838 break;
839
840 case GZSTATE_ORIGNAME:
841 if ((flags & ORIG_NAME) == 0) {
842 state++;
843 break;
844 }
845 if (*z.next_in == 0)
846 state++;
847 ADVANCE();
848 break;
849
850 case GZSTATE_COMMENT:
851 if ((flags & COMMENT) == 0) {
852 state++;
853 break;
854 }
855 if (*z.next_in == 0)
856 state++;
857 ADVANCE();
858 break;
859
860 case GZSTATE_HEAD_CRC1:
861 if (flags & HEAD_CRC)
862 skip_count = 2;
863 else
864 skip_count = 0;
865 state++;
866 break;
867
868 case GZSTATE_HEAD_CRC2:
869 if (skip_count > 0) {
870 skip_count--;
871 ADVANCE();
872 } else
873 state++;
874 break;
875
876 case GZSTATE_INIT:
877 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
878 maybe_warnx("failed to inflateInit");
879 goto stop_and_fail;
880 }
881 state++;
882 break;
883
884 case GZSTATE_READ:
885 error = inflate(&z, Z_FINISH);
886 switch (error) {
887 /* Z_BUF_ERROR goes with Z_FINISH... */
888 case Z_BUF_ERROR:
889 case Z_STREAM_END:
890 case Z_OK:
891 break;
892
893 case Z_NEED_DICT:
894 maybe_warnx("Z_NEED_DICT error");
895 goto stop_and_fail;
896 case Z_DATA_ERROR:
897 maybe_warnx("data stream error");
898 goto stop_and_fail;
899 case Z_STREAM_ERROR:
900 maybe_warnx("internal stream error");
901 goto stop_and_fail;
902 case Z_MEM_ERROR:
903 maybe_warnx("memory allocation error");
904 goto stop_and_fail;
905
906 default:
907 maybe_warn("unknown error from inflate(): %d",
908 error);
909 }
910 wr = BUFLEN - z.avail_out;
911
912 if (wr != 0) {
913 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
914 if (
915 #ifndef SMALL
916 /* don't write anything with -t */
917 tflag == 0 &&
918 #endif
919 write(out, outbufp, wr) != wr) {
920 maybe_warn("error writing to output");
921 goto stop_and_fail;
922 }
923
924 out_tot += wr;
925 out_sub_tot += wr;
926 }
927
928 if (error == Z_STREAM_END) {
929 inflateEnd(&z);
930 state++;
931 }
932
933 z.next_out = outbufp;
934 z.avail_out = BUFLEN;
935
936 break;
937 case GZSTATE_CRC:
938 {
939 uLong origcrc;
940
941 if (z.avail_in < 4) {
942 if (!done_reading) {
943 needmore = 1;
944 continue;
945 }
946 maybe_warnx("truncated input");
947 goto stop_and_fail;
948 }
949 origcrc = ((unsigned)z.next_in[0] & 0xff) |
950 ((unsigned)z.next_in[1] & 0xff) << 8 |
951 ((unsigned)z.next_in[2] & 0xff) << 16 |
952 ((unsigned)z.next_in[3] & 0xff) << 24;
953 if (origcrc != crc) {
954 maybe_warnx("invalid compressed"
955 " data--crc error");
956 goto stop_and_fail;
957 }
958 }
959
960 z.avail_in -= 4;
961 z.next_in += 4;
962
963 if (!z.avail_in && done_reading) {
964 goto stop;
965 }
966 state++;
967 break;
968 case GZSTATE_LEN:
969 {
970 uLong origlen;
971
972 if (z.avail_in < 4) {
973 if (!done_reading) {
974 needmore = 1;
975 continue;
976 }
977 maybe_warnx("truncated input");
978 goto stop_and_fail;
979 }
980 origlen = ((unsigned)z.next_in[0] & 0xff) |
981 ((unsigned)z.next_in[1] & 0xff) << 8 |
982 ((unsigned)z.next_in[2] & 0xff) << 16 |
983 ((unsigned)z.next_in[3] & 0xff) << 24;
984
985 if (origlen != out_sub_tot) {
986 maybe_warnx("invalid compressed"
987 " data--length error");
988 goto stop_and_fail;
989 }
990 }
991
992 z.avail_in -= 4;
993 z.next_in += 4;
994
995 if (error < 0) {
996 maybe_warnx("decompression error");
997 goto stop_and_fail;
998 }
999 state = GZSTATE_MAGIC0;
1000 break;
1001 }
1002 continue;
1003 stop_and_fail:
1004 out_tot = -1;
1005 stop:
1006 break;
1007 }
1008 if (state > GZSTATE_INIT)
1009 inflateEnd(&z);
1010
1011 free(inbufp);
1012 out1:
1013 free(outbufp);
1014 out2:
1015 if (gsizep)
1016 *gsizep = in_tot;
1017 return (out_tot);
1018 }
1019
1020 #ifndef SMALL
1021 /*
1022 * set the owner, mode, flags & utimes using the given file descriptor.
1023 * file is only used in possible warning messages.
1024 */
1025 static void
1026 copymodes(int fd, const struct stat *sbp, const char *file)
1027 {
1028 struct timeval times[2];
1029 struct stat sb;
1030
1031 /*
1032 * If we have no info on the input, give this file some
1033 * default values and return..
1034 */
1035 if (sbp == NULL) {
1036 mode_t mask = umask(022);
1037
1038 (void)fchmod(fd, DEFFILEMODE & ~mask);
1039 (void)umask(mask);
1040 return;
1041 }
1042 sb = *sbp;
1043
1044 /* if the chown fails, remove set-id bits as-per compress(1) */
1045 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) {
1046 if (errno != EPERM)
1047 maybe_warn("couldn't fchown: %s", file);
1048 sb.st_mode &= ~(S_ISUID|S_ISGID);
1049 }
1050
1051 /* we only allow set-id and the 9 normal permission bits */
1052 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1053 if (fchmod(fd, sb.st_mode) < 0)
1054 maybe_warn("couldn't fchmod: %s", file);
1055
1056 /* only try flags if they exist already */
1057 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0)
1058 maybe_warn("couldn't fchflags: %s", file);
1059
1060 TIMESPEC_TO_TIMEVAL(&times[0], &sb.st_atimespec);
1061 TIMESPEC_TO_TIMEVAL(&times[1], &sb.st_mtimespec);
1062 if (futimes(fd, times) < 0)
1063 maybe_warn("couldn't utimes: %s", file);
1064 }
1065 #endif
1066
1067 /* what sort of file is this? */
1068 static enum filetype
1069 file_gettype(u_char *buf)
1070 {
1071
1072 if (buf[0] == GZIP_MAGIC0 &&
1073 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1074 return FT_GZIP;
1075 else
1076 #ifndef NO_BZIP2_SUPPORT
1077 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1078 buf[3] >= '0' && buf[3] <= '9')
1079 return FT_BZIP2;
1080 else
1081 #endif
1082 #ifndef NO_COMPRESS_SUPPORT
1083 if (memcmp(buf, Z_MAGIC, 2) == 0)
1084 return FT_Z;
1085 else
1086 #endif
1087 #ifndef NO_PACK_SUPPORT
1088 if (memcmp(buf, PACK_MAGIC, 2) == 0)
1089 return FT_PACK;
1090 else
1091 #endif
1092 return FT_UNKNOWN;
1093 }
1094
1095 #ifndef SMALL
1096 /* check the outfile is OK. */
1097 static int
1098 check_outfile(const char *outfile)
1099 {
1100 struct stat sb;
1101 int ok = 1;
1102
1103 if (lflag == 0 && stat(outfile, &sb) == 0) {
1104 if (fflag)
1105 unlink(outfile);
1106 else if (isatty(STDIN_FILENO)) {
1107 char ans[10] = { 'n', '\0' }; /* default */
1108
1109 fprintf(stderr, "%s already exists -- do you wish to "
1110 "overwrite (y or n)? " , outfile);
1111 (void)fgets(ans, sizeof(ans) - 1, stdin);
1112 if (ans[0] != 'y' && ans[0] != 'Y') {
1113 fprintf(stderr, "\tnot overwriting\n");
1114 ok = 0;
1115 } else
1116 unlink(outfile);
1117 } else {
1118 maybe_warnx("%s already exists -- skipping", outfile);
1119 ok = 0;
1120 }
1121 }
1122 return ok;
1123 }
1124
1125 static void
1126 unlink_input(const char *file, const struct stat *sb)
1127 {
1128 struct stat nsb;
1129
1130 if (stat(file, &nsb) != 0)
1131 /* Must be gone alrady */
1132 return;
1133 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1134 /* Definitely a different file */
1135 return;
1136 unlink(file);
1137 }
1138 #endif
1139
1140 static const suffixes_t *
1141 check_suffix(char *file, int xlate)
1142 {
1143 const suffixes_t *s;
1144 int len = strlen(file);
1145 char *sp;
1146
1147 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1148 /* if it doesn't fit in "a.suf", don't bother */
1149 if (s->ziplen >= len)
1150 continue;
1151 sp = file + len - s->ziplen;
1152 if (strcmp(s->zipped, sp) != 0)
1153 continue;
1154 if (xlate)
1155 strcpy(sp, s->normal);
1156 return s;
1157 }
1158 return NULL;
1159 }
1160
1161 /*
1162 * compress the given file: create a corresponding .gz file and remove the
1163 * original.
1164 */
1165 static off_t
1166 file_compress(char *file, char *outfile, size_t outsize)
1167 {
1168 int in;
1169 int out;
1170 off_t size, insize;
1171 #ifndef SMALL
1172 struct stat isb, osb;
1173 const suffixes_t *suff;
1174 #endif
1175
1176 in = open(file, O_RDONLY);
1177 if (in == -1) {
1178 maybe_warn("can't open %s", file);
1179 return -1;
1180 }
1181
1182 if (cflag == 0) {
1183 #ifndef SMALL
1184 if (fstat(in, &isb) == 0) {
1185 if (isb.st_nlink > 1 && fflag == 0) {
1186 maybe_warnx("%s has %d other link%s -- "
1187 "skipping", file, isb.st_nlink - 1,
1188 isb.st_nlink == 1 ? "" : "s");
1189 close(in);
1190 return -1;
1191 }
1192 }
1193
1194 if (fflag == 0 && (suff = check_suffix(file, 0))
1195 && suff->zipped[0] != 0) {
1196 maybe_warnx("%s already has %s suffix -- unchanged",
1197 file, suff->zipped);
1198 close(in);
1199 return -1;
1200 }
1201 #endif
1202
1203 /* Add (usually) .gz to filename */
1204 if ((size_t)snprintf(outfile, outsize, "%s%s",
1205 file, suffixes[0].zipped) >= outsize)
1206 memcpy(outfile + outsize - suffixes[0].ziplen - 1,
1207 suffixes[0].zipped, suffixes[0].ziplen + 1);
1208
1209 #ifndef SMALL
1210 if (check_outfile(outfile) == 0) {
1211 close(in);
1212 return -1;
1213 }
1214 #endif
1215 }
1216
1217 if (cflag == 0) {
1218 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1219 if (out == -1) {
1220 maybe_warn("could not create output: %s", outfile);
1221 fclose(stdin);
1222 return -1;
1223 }
1224 } else
1225 out = STDOUT_FILENO;
1226
1227 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1228
1229 (void)close(in);
1230
1231 /*
1232 * If there was an error, insize will be -1.
1233 * If we compressed to stdout, just return the size.
1234 * Otherwise stat the file and check it is the correct size.
1235 * We only blow away the file if we can stat the output and it
1236 * has the expected size.
1237 */
1238 if (cflag != 0)
1239 return insize == -1 ? -1 : size;
1240
1241 #ifndef SMALL
1242 if (fstat(out, &osb) != 0) {
1243 maybe_warn("couldn't stat: %s", outfile);
1244 goto bad_outfile;
1245 }
1246
1247 if (osb.st_size != size) {
1248 maybe_warnx("output file: %s wrong size (%" PRIdOFF
1249 " != %" PRIdOFF "), deleting",
1250 outfile, osb.st_size, size);
1251 goto bad_outfile;
1252 }
1253
1254 copymodes(out, &isb, outfile);
1255 #endif
1256 if (close(out) == -1)
1257 maybe_warn("couldn't close output");
1258
1259 /* output is good, ok to delete input */
1260 unlink_input(file, &isb);
1261 return size;
1262
1263 #ifndef SMALL
1264 bad_outfile:
1265 if (close(out) == -1)
1266 maybe_warn("couldn't close output");
1267
1268 maybe_warnx("leaving original %s", file);
1269 unlink(outfile);
1270 return size;
1271 #endif
1272 }
1273
1274 /* uncompress the given file and remove the original */
1275 static off_t
1276 file_uncompress(char *file, char *outfile, size_t outsize)
1277 {
1278 struct stat isb, osb;
1279 off_t size;
1280 ssize_t rbytes;
1281 unsigned char header1[4];
1282 enum filetype method;
1283 int fd, ofd, zfd = -1;
1284 #ifndef SMALL
1285 ssize_t rv;
1286 time_t timestamp = 0;
1287 unsigned char name[PATH_MAX + 1];
1288 #endif
1289
1290 /* gather the old name info */
1291
1292 fd = open(file, O_RDONLY);
1293 if (fd < 0) {
1294 maybe_warn("can't open %s", file);
1295 goto lose;
1296 }
1297
1298 strlcpy(outfile, file, outsize);
1299 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1300 maybe_warnx("%s: unknown suffix -- ignored", file);
1301 goto lose;
1302 }
1303
1304 rbytes = read(fd, header1, sizeof header1);
1305 if (rbytes != sizeof header1) {
1306 /* we don't want to fail here. */
1307 #ifndef SMALL
1308 if (fflag)
1309 goto lose;
1310 #endif
1311 if (rbytes == -1)
1312 maybe_warn("can't read %s", file);
1313 else
1314 goto unexpected_EOF;
1315 goto lose;
1316 }
1317
1318 method = file_gettype(header1);
1319
1320 #ifndef SMALL
1321 if (fflag == 0 && method == FT_UNKNOWN) {
1322 maybe_warnx("%s: not in gzip format", file);
1323 goto lose;
1324 }
1325
1326 #endif
1327
1328 #ifndef SMALL
1329 if (method == FT_GZIP && Nflag) {
1330 unsigned char ts[4]; /* timestamp */
1331
1332 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
1333 if (rv >= 0 && rv < (ssize_t)(sizeof ts))
1334 goto unexpected_EOF;
1335 if (rv == -1) {
1336 if (!fflag)
1337 maybe_warn("can't read %s", file);
1338 goto lose;
1339 }
1340 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1341
1342 if (header1[3] & ORIG_NAME) {
1343 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
1344 if (rbytes < 0) {
1345 maybe_warn("can't read %s", file);
1346 goto lose;
1347 }
1348 if (name[0] != 0) {
1349 /* preserve original directory name */
1350 char *dp = strrchr(file, '/');
1351 if (dp == NULL)
1352 dp = file;
1353 else
1354 dp++;
1355 snprintf(outfile, outsize, "%.*s%.*s",
1356 (int) (dp - file),
1357 file, (int) rbytes, name);
1358 }
1359 }
1360 }
1361 #endif
1362 lseek(fd, 0, SEEK_SET);
1363
1364 if (cflag == 0 || lflag) {
1365 if (fstat(fd, &isb) != 0)
1366 goto lose;
1367 #ifndef SMALL
1368 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1369 maybe_warnx("%s has %d other links -- skipping",
1370 file, isb.st_nlink - 1);
1371 goto lose;
1372 }
1373 if (nflag == 0 && timestamp)
1374 isb.st_mtime = timestamp;
1375 if (check_outfile(outfile) == 0)
1376 goto lose;
1377 #endif
1378 }
1379
1380 if (cflag == 0 && lflag == 0) {
1381 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1382 if (zfd == STDOUT_FILENO) {
1383 /* We won't close STDOUT_FILENO later... */
1384 zfd = dup(zfd);
1385 close(STDOUT_FILENO);
1386 }
1387 if (zfd == -1) {
1388 maybe_warn("can't open %s", outfile);
1389 goto lose;
1390 }
1391 } else
1392 zfd = STDOUT_FILENO;
1393
1394 #ifndef NO_BZIP2_SUPPORT
1395 if (method == FT_BZIP2) {
1396
1397 /* XXX */
1398 if (lflag) {
1399 maybe_warnx("no -l with bzip2 files");
1400 goto lose;
1401 }
1402
1403 size = unbzip2(fd, zfd, NULL, 0, NULL);
1404 } else
1405 #endif
1406
1407 #ifndef NO_COMPRESS_SUPPORT
1408 if (method == FT_Z) {
1409 FILE *in, *out;
1410
1411 /* XXX */
1412 if (lflag) {
1413 maybe_warnx("no -l with Lempel-Ziv files");
1414 goto lose;
1415 }
1416
1417 if ((in = zdopen(fd)) == NULL) {
1418 maybe_warn("zdopen for read: %s", file);
1419 goto lose;
1420 }
1421
1422 out = fdopen(dup(zfd), "w");
1423 if (out == NULL) {
1424 maybe_warn("fdopen for write: %s", outfile);
1425 fclose(in);
1426 goto lose;
1427 }
1428
1429 size = zuncompress(in, out, NULL, 0, NULL);
1430 /* need to fclose() if ferror() is true... */
1431 if (ferror(in) | fclose(in)) {
1432 maybe_warn("failed infile fclose");
1433 unlink(outfile);
1434 (void)fclose(out);
1435 }
1436 if (fclose(out) != 0) {
1437 maybe_warn("failed outfile fclose");
1438 unlink(outfile);
1439 goto lose;
1440 }
1441 } else
1442 #endif
1443
1444 #ifndef NO_PACK_SUPPORT
1445 if (method == FT_PACK) {
1446 if (lflag) {
1447 maybe_warnx("no -l with packed files");
1448 goto lose;
1449 }
1450
1451 size = unpack(fd, zfd, NULL, 0, NULL);
1452 } else
1453 #endif
1454
1455 #ifndef SMALL
1456 if (method == FT_UNKNOWN) {
1457 if (lflag) {
1458 maybe_warnx("no -l for unknown filetypes");
1459 goto lose;
1460 }
1461 size = cat_fd(NULL, 0, NULL, fd);
1462 } else
1463 #endif
1464 {
1465 if (lflag) {
1466 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1467 close(fd);
1468 return -1; /* XXX */
1469 }
1470
1471 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1472 }
1473
1474 if (close(fd) != 0)
1475 maybe_warn("couldn't close input");
1476 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1477 maybe_warn("couldn't close output");
1478
1479 if (size == -1) {
1480 if (cflag == 0)
1481 unlink(outfile);
1482 maybe_warnx("%s: uncompress failed", file);
1483 return -1;
1484 }
1485
1486 /* if testing, or we uncompressed to stdout, this is all we need */
1487 #ifndef SMALL
1488 if (tflag)
1489 return size;
1490 #endif
1491 /* if we are uncompressing to stdin, don't remove the file. */
1492 if (cflag)
1493 return size;
1494
1495 /*
1496 * if we create a file...
1497 */
1498 /*
1499 * if we can't stat the file don't remove the file.
1500 */
1501
1502 ofd = open(outfile, O_RDWR, 0);
1503 if (ofd == -1) {
1504 maybe_warn("couldn't open (leaving original): %s",
1505 outfile);
1506 return -1;
1507 }
1508 if (fstat(ofd, &osb) != 0) {
1509 maybe_warn("couldn't stat (leaving original): %s",
1510 outfile);
1511 close(ofd);
1512 return -1;
1513 }
1514 if (osb.st_size != size) {
1515 maybe_warnx("stat gave different size: %" PRIdOFF
1516 " != %" PRIdOFF " (leaving original)",
1517 size, osb.st_size);
1518 close(ofd);
1519 unlink(outfile);
1520 return -1;
1521 }
1522 unlink_input(file, &isb);
1523 #ifndef SMALL
1524 copymodes(ofd, &isb, outfile);
1525 #endif
1526 close(ofd);
1527 return size;
1528
1529 unexpected_EOF:
1530 maybe_warnx("%s: unexpected end of file", file);
1531 lose:
1532 if (fd != -1)
1533 close(fd);
1534 if (zfd != -1 && zfd != STDOUT_FILENO)
1535 close(fd);
1536 return -1;
1537 }
1538
1539 #ifndef SMALL
1540 static off_t
1541 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd)
1542 {
1543 char buf[BUFLEN];
1544 off_t in_tot;
1545 ssize_t w;
1546
1547 in_tot = count;
1548 w = write(STDOUT_FILENO, prepend, count);
1549 if (w == -1 || (size_t)w != count) {
1550 maybe_warn("write to stdout");
1551 return -1;
1552 }
1553 for (;;) {
1554 ssize_t rv;
1555
1556 rv = read(fd, buf, sizeof buf);
1557 if (rv == 0)
1558 break;
1559 if (rv < 0) {
1560 maybe_warn("read from fd %d", fd);
1561 break;
1562 }
1563
1564 if (write(STDOUT_FILENO, buf, rv) != rv) {
1565 maybe_warn("write to stdout");
1566 break;
1567 }
1568 in_tot += rv;
1569 }
1570
1571 if (gsizep)
1572 *gsizep = in_tot;
1573 return (in_tot);
1574 }
1575 #endif
1576
1577 static void
1578 handle_stdin(void)
1579 {
1580 unsigned char header1[4];
1581 off_t usize, gsize;
1582 enum filetype method;
1583 ssize_t bytes_read;
1584 #ifndef NO_COMPRESS_SUPPORT
1585 FILE *in;
1586 #endif
1587
1588 #ifndef SMALL
1589 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1590 maybe_warnx("standard input is a terminal -- ignoring");
1591 return;
1592 }
1593 #endif
1594
1595 if (lflag) {
1596 struct stat isb;
1597
1598 /* XXX could read the whole file, etc. */
1599 if (fstat(STDIN_FILENO, &isb) < 0) {
1600 maybe_warn("fstat");
1601 return;
1602 }
1603 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1604 return;
1605 }
1606
1607 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
1608 if (bytes_read == -1) {
1609 maybe_warn("can't read stdin");
1610 return;
1611 } else if (bytes_read != sizeof(header1)) {
1612 maybe_warnx("(stdin): unexpected end of file");
1613 return;
1614 }
1615
1616 method = file_gettype(header1);
1617 switch (method) {
1618 default:
1619 #ifndef SMALL
1620 if (fflag == 0) {
1621 maybe_warnx("unknown compression format");
1622 return;
1623 }
1624 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1625 break;
1626 #endif
1627 case FT_GZIP:
1628 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1629 header1, sizeof header1, &gsize, "(stdin)");
1630 break;
1631 #ifndef NO_BZIP2_SUPPORT
1632 case FT_BZIP2:
1633 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1634 header1, sizeof header1, &gsize);
1635 break;
1636 #endif
1637 #ifndef NO_COMPRESS_SUPPORT
1638 case FT_Z:
1639 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1640 maybe_warnx("zopen of stdin");
1641 return;
1642 }
1643
1644 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
1645 fclose(in);
1646 break;
1647 #endif
1648 #ifndef NO_PACK_SUPPORT
1649 case FT_PACK:
1650 usize = unpack(STDIN_FILENO, STDOUT_FILENO,
1651 (char *)header1, sizeof header1, &gsize);
1652 break;
1653 #endif
1654 }
1655
1656 #ifndef SMALL
1657 if (vflag && !tflag && usize != -1 && gsize != -1)
1658 print_verbage(NULL, NULL, usize, gsize);
1659 if (vflag && tflag)
1660 print_test("(stdin)", usize != -1);
1661 #endif
1662
1663 }
1664
1665 static void
1666 handle_stdout(void)
1667 {
1668 off_t gsize, usize;
1669 struct stat sb;
1670 time_t systime;
1671 uint32_t mtime;
1672 int ret;
1673
1674 #ifndef SMALL
1675 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1676 maybe_warnx("standard output is a terminal -- ignoring");
1677 return;
1678 }
1679 #endif
1680 /* If stdin is a file use it's mtime, otherwise use current time */
1681 ret = fstat(STDIN_FILENO, &sb);
1682
1683 #ifndef SMALL
1684 if (ret < 0) {
1685 maybe_warn("Can't stat stdin");
1686 return;
1687 }
1688 #endif
1689
1690 if (S_ISREG(sb.st_mode))
1691 mtime = (uint32_t)sb.st_mtime;
1692 else {
1693 systime = time(NULL);
1694 #ifndef SMALL
1695 if (systime == -1) {
1696 maybe_warn("time");
1697 return;
1698 }
1699 #endif
1700 mtime = (uint32_t)systime;
1701 }
1702
1703 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
1704 #ifndef SMALL
1705 if (vflag && !tflag && usize != -1 && gsize != -1)
1706 print_verbage(NULL, NULL, usize, gsize);
1707 #endif
1708 }
1709
1710 /* do what is asked for, for the path name */
1711 static void
1712 handle_pathname(char *path)
1713 {
1714 char *opath = path, *s = NULL;
1715 ssize_t len;
1716 int slen;
1717 struct stat sb;
1718
1719 /* check for stdout/stdin */
1720 if (path[0] == '-' && path[1] == '\0') {
1721 if (dflag)
1722 handle_stdin();
1723 else
1724 handle_stdout();
1725 return;
1726 }
1727
1728 retry:
1729 if (stat(path, &sb) != 0) {
1730 /* lets try <path>.gz if we're decompressing */
1731 if (dflag && s == NULL && errno == ENOENT) {
1732 len = strlen(path);
1733 slen = suffixes[0].ziplen;
1734 s = malloc(len + slen + 1);
1735 if (s == NULL)
1736 maybe_err("malloc");
1737 memcpy(s, path, len);
1738 memcpy(s + len, suffixes[0].zipped, slen + 1);
1739 path = s;
1740 goto retry;
1741 }
1742 maybe_warn("can't stat: %s", opath);
1743 goto out;
1744 }
1745
1746 if (S_ISDIR(sb.st_mode)) {
1747 #ifndef SMALL
1748 if (rflag)
1749 handle_dir(path);
1750 else
1751 #endif
1752 maybe_warnx("%s is a directory", path);
1753 goto out;
1754 }
1755
1756 if (S_ISREG(sb.st_mode))
1757 handle_file(path, &sb);
1758 else
1759 maybe_warnx("%s is not a regular file", path);
1760
1761 out:
1762 if (s)
1763 free(s);
1764 }
1765
1766 /* compress/decompress a file */
1767 static void
1768 handle_file(char *file, struct stat *sbp)
1769 {
1770 off_t usize, gsize;
1771 char outfile[PATH_MAX];
1772
1773 infile = file;
1774 if (dflag) {
1775 usize = file_uncompress(file, outfile, sizeof(outfile));
1776 #ifndef SMALL
1777 if (vflag && tflag)
1778 print_test(file, usize != -1);
1779 #endif
1780 if (usize == -1)
1781 return;
1782 gsize = sbp->st_size;
1783 } else {
1784 gsize = file_compress(file, outfile, sizeof(outfile));
1785 if (gsize == -1)
1786 return;
1787 usize = sbp->st_size;
1788 }
1789
1790
1791 #ifndef SMALL
1792 if (vflag && !tflag)
1793 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1794 #endif
1795 }
1796
1797 #ifndef SMALL
1798 /* this is used with -r to recursively descend directories */
1799 static void
1800 handle_dir(char *dir)
1801 {
1802 char *path_argv[2];
1803 FTS *fts;
1804 FTSENT *entry;
1805
1806 path_argv[0] = dir;
1807 path_argv[1] = 0;
1808 fts = fts_open(path_argv, FTS_PHYSICAL, NULL);
1809 if (fts == NULL) {
1810 warn("couldn't fts_open %s", dir);
1811 return;
1812 }
1813
1814 while ((entry = fts_read(fts))) {
1815 switch(entry->fts_info) {
1816 case FTS_D:
1817 case FTS_DP:
1818 continue;
1819
1820 case FTS_DNR:
1821 case FTS_ERR:
1822 case FTS_NS:
1823 maybe_warn("%s", entry->fts_path);
1824 continue;
1825 case FTS_F:
1826 handle_file(entry->fts_name, entry->fts_statp);
1827 }
1828 }
1829 (void)fts_close(fts);
1830 }
1831 #endif
1832
1833 /* print a ratio - size reduction as a fraction of uncompressed size */
1834 static void
1835 print_ratio(off_t in, off_t out, FILE *where)
1836 {
1837 int percent10; /* 10 * percent */
1838 off_t diff;
1839 char buff[8];
1840 int len;
1841
1842 diff = in - out/2;
1843 if (diff <= 0)
1844 /*
1845 * Output is more than double size of input! print -99.9%
1846 * Quite possibly we've failed to get the original size.
1847 */
1848 percent10 = -999;
1849 else {
1850 /*
1851 * We only need 12 bits of result from the final division,
1852 * so reduce the values until a 32bit division will suffice.
1853 */
1854 while (in > 0x100000) {
1855 diff >>= 1;
1856 in >>= 1;
1857 }
1858 if (in != 0)
1859 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1860 else
1861 percent10 = 0;
1862 }
1863
1864 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1865 /* Move the '.' to before the last digit */
1866 buff[len - 1] = buff[len - 2];
1867 buff[len - 2] = '.';
1868 fprintf(where, "%5s%%", buff);
1869 }
1870
1871 #ifndef SMALL
1872 /* print compression statistics, and the new name (if there is one!) */
1873 static void
1874 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1875 {
1876 if (file)
1877 fprintf(stderr, "%s:%s ", file,
1878 strlen(file) < 7 ? "\t\t" : "\t");
1879 print_ratio(usize, gsize, stderr);
1880 if (nfile)
1881 fprintf(stderr, " -- replaced with %s", nfile);
1882 fprintf(stderr, "\n");
1883 fflush(stderr);
1884 }
1885
1886 /* print test results */
1887 static void
1888 print_test(const char *file, int ok)
1889 {
1890
1891 if (exit_value == 0 && ok == 0)
1892 exit_value = 1;
1893 fprintf(stderr, "%s:%s %s\n", file,
1894 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
1895 fflush(stderr);
1896 }
1897 #endif
1898
1899 /* print a file's info ala --list */
1900 /* eg:
1901 compressed uncompressed ratio uncompressed_name
1902 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
1903 */
1904 static void
1905 print_list(int fd, off_t out, const char *outfile, time_t ts)
1906 {
1907 static int first = 1;
1908 #ifndef SMALL
1909 static off_t in_tot, out_tot;
1910 uint32_t crc = 0;
1911 #endif
1912 off_t in = 0, rv;
1913
1914 if (first) {
1915 #ifndef SMALL
1916 if (vflag)
1917 printf("method crc date time ");
1918 #endif
1919 if (qflag == 0)
1920 printf(" compressed uncompressed "
1921 "ratio uncompressed_name\n");
1922 }
1923 first = 0;
1924
1925 /* print totals? */
1926 #ifndef SMALL
1927 if (fd == -1) {
1928 in = in_tot;
1929 out = out_tot;
1930 } else
1931 #endif
1932 {
1933 /* read the last 4 bytes - this is the uncompressed size */
1934 rv = lseek(fd, (off_t)(-8), SEEK_END);
1935 if (rv != -1) {
1936 unsigned char buf[8];
1937 uint32_t usize;
1938
1939 rv = read(fd, (char *)buf, sizeof(buf));
1940 if (rv == -1)
1941 maybe_warn("read of uncompressed size");
1942 else if (rv != sizeof(buf))
1943 maybe_warnx("read of uncompressed size");
1944
1945 else {
1946 usize = buf[4] | buf[5] << 8 |
1947 buf[6] << 16 | buf[7] << 24;
1948 in = (off_t)usize;
1949 #ifndef SMALL
1950 crc = buf[0] | buf[1] << 8 |
1951 buf[2] << 16 | buf[3] << 24;
1952 #endif
1953 }
1954 }
1955 }
1956
1957 #ifndef SMALL
1958 if (vflag && fd == -1)
1959 printf(" ");
1960 else if (vflag) {
1961 char *date = ctime(&ts);
1962
1963 /* skip the day, 1/100th second, and year */
1964 date += 4;
1965 date[12] = 0;
1966 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
1967 }
1968 in_tot += in;
1969 out_tot += out;
1970 #endif
1971 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
1972 print_ratio(in, out, stdout);
1973 printf(" %s\n", outfile);
1974 }
1975
1976 /* display the usage of NetBSD gzip */
1977 static void
1978 usage(void)
1979 {
1980
1981 fprintf(stderr, "%s\n", gzip_version);
1982 fprintf(stderr,
1983 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n"
1984 #ifndef SMALL
1985 " -1 --fast fastest (worst) compression\n"
1986 " -2 .. -8 set compression level\n"
1987 " -9 --best best (slowest) compression\n"
1988 " -c --stdout write to stdout, keep original files\n"
1989 " --to-stdout\n"
1990 " -d --decompress uncompress files\n"
1991 " --uncompress\n"
1992 " -f --force force overwriting & compress links\n"
1993 " -h --help display this help\n"
1994 " -l --list list compressed file contents\n"
1995 " -N --name save or restore original file name and time stamp\n"
1996 " -n --no-name don't save original file name or time stamp\n"
1997 " -q --quiet output no warnings\n"
1998 " -r --recursive recursively compress files in directories\n"
1999 " -S .suf use suffix .suf instead of .gz\n"
2000 " --suffix .suf\n"
2001 " -t --test test compressed file\n"
2002 " -V --version display program version\n"
2003 " -v --verbose print extra statistics\n",
2004 #else
2005 ,
2006 #endif
2007 getprogname());
2008 exit(0);
2009 }
2010
2011 /* display the version of NetBSD gzip */
2012 static void
2013 display_version(void)
2014 {
2015
2016 fprintf(stderr, "%s\n", gzip_version);
2017 exit(0);
2018 }
2019
2020 #ifndef NO_BZIP2_SUPPORT
2021 #include "unbzip2.c"
2022 #endif
2023 #ifndef NO_COMPRESS_SUPPORT
2024 #include "zuncompress.c"
2025 #endif
2026 #ifndef NO_PACK_SUPPORT
2027 #include "unpack.c"
2028 #endif
2029
2030 static ssize_t
2031 read_retry(int fd, void *buf, size_t sz)
2032 {
2033 char *cp = buf;
2034 size_t left = MIN(sz, (size_t) SSIZE_MAX);
2035
2036 while (left > 0) {
2037 ssize_t ret;
2038
2039 ret = read(fd, cp, left);
2040 if (ret == -1) {
2041 return ret;
2042 } else if (ret == 0) {
2043 break; /* EOF */
2044 }
2045 cp += ret;
2046 left -= ret;
2047 }
2048
2049 return sz - left;
2050 }
NetBSD on the FriendlyARM MINI2440