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- Add a '-k' option which does not remove input file, like bzip2(1) do.
[dragonfly.git] / usr.bin / gzip / gzip.c
blobde30a08087fc6b0a79e1dc7e4145dd3d81a434f2
1 /* $NetBSD: gzip.c,v 1.67 2004/09/11 11:07:44 dsl Exp $ */
2 /* $DragonFly: src/usr.bin/gzip/gzip.c,v 1.7 2007/12/06 19:54:52 hasso Exp $ */
3
4 /*
5 * Copyright (c) 1997, 1998, 2003, 2004 Matthew R. Green
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the author may not be used to endorse or promote products
17 * derived from this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
24 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
25 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
26 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
27 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32 /*
33 * gzip.c -- GPL free gzip using zlib.
34 *
35 * RFC 1950 covers the zlib format
36 * RFC 1951 covers the deflate format
37 * RFC 1952 covers the gzip format
38 *
39 * TODO:
40 * - use mmap where possible
41 * - handle some signals better (remove outfile?)
42 * - make bzip2/compress -v/-t/-l support work as well as possible
43 */
44
45 #include <sys/param.h>
46 #include <sys/stat.h>
47 #include <sys/time.h>
48
49 #include <err.h>
50 #include <errno.h>
51 #include <fcntl.h>
52 #include <fts.h>
53 #include <getopt.h>
54 #include <inttypes.h>
55 #include <libgen.h>
56 #include <stdarg.h>
57 #include <stdio.h>
58 #include <stdlib.h>
59 #include <string.h>
60 #include <unistd.h>
61 #include <zlib.h>
62
63 #ifndef PRIdOFF
64 #define PRIdOFF PRId64
65 #endif
66
67 #ifndef PRId64
68 #define PRId64 "lld"
69 #endif
70
71 /* what type of file are we dealing with */
72 enum filetype {
73 FT_GZIP,
74 #ifndef NO_BZIP2_SUPPORT
75 FT_BZIP2,
76 #endif
77 #ifndef NO_COMPRESS_SUPPORT
78 FT_Z,
79 #endif
80 FT_LAST,
81 FT_UNKNOWN
82 };
83
84 #ifndef NO_BZIP2_SUPPORT
85 #include <bzlib.h>
86
87 #define BZ2_SUFFIX ".bz2"
88 #define BZIP2_MAGIC "\102\132\150"
89 #endif
90
91 #ifndef NO_COMPRESS_SUPPORT
92 #define Z_SUFFIX ".Z"
93 #define Z_MAGIC "\037\235"
94 #endif
95
96 #define GZ_SUFFIX ".gz"
97
98 #define BUFLEN (64 * 1024)
99
100 #define GZIP_MAGIC0 0x1F
101 #define GZIP_MAGIC1 0x8B
102 #define GZIP_OMAGIC1 0x9E
103
104 #define GZIP_TIMESTAMP (off_t)4
105 #define GZIP_ORIGNAME (off_t)10
106
107 #define HEAD_CRC 0x02
108 #define EXTRA_FIELD 0x04
109 #define ORIG_NAME 0x08
110 #define COMMENT 0x10
111
112 #define OS_CODE 3 /* Unix */
113
114 typedef struct {
115 const char *zipped;
116 int ziplen;
117 const char *normal; /* for unzip - must not be longer than zipped */
118 } suffixes_t;
119 static suffixes_t suffixes[] = {
120 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
121 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
122 #ifndef SMALL
123 SUFFIX(GZ_SUFFIX, ""),
124 SUFFIX(".z", ""),
125 SUFFIX("-gz", ""),
126 SUFFIX("-z", ""),
127 SUFFIX("_z", ""),
128 SUFFIX(".taz", ".tar"),
129 SUFFIX(".tgz", ".tar"),
130 #ifndef NO_BZIP2_SUPPORT
131 SUFFIX(BZ2_SUFFIX, ""),
132 #endif
133 #ifndef NO_COMPRESS_SUPPORT
134 SUFFIX(Z_SUFFIX, ""),
135 #endif
136 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
137 #endif /* SMALL */
138 #undef SUFFIX
139 };
140 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
141
142 static const char gzip_version[] = "NetBSD gzip 20040830";
143
144 static int cflag; /* stdout mode */
145 static int dflag; /* decompress mode */
146 static int lflag; /* list mode */
147 static int numflag = 6; /* gzip -1..-9 value */
148
149 #ifndef SMALL
150 static int fflag; /* force mode */
151 static int kflag; /* don't delete input files */
152 static int nflag; /* don't save name/timestamp */
153 static int Nflag; /* don't restore name/timestamp */
154 static int qflag; /* quiet mode */
155 static int rflag; /* recursive mode */
156 static int tflag; /* test */
157 static int vflag; /* verbose mode */
158 #else
159 #define qflag 0
160 #define tflag 0
161 #endif
162
163 static int exit_value = 0; /* exit value */
164
165 static char *infile; /* name of file coming in */
166
167 static void maybe_err(const char *fmt, ...)
168 __attribute__((__format__(__printf__, 1, 2)));
169 #ifndef NO_BZIP2_SUPPORT
170 static void maybe_errx(const char *fmt, ...)
171 __attribute__((__format__(__printf__, 1, 2)));
172 #endif
173 static void maybe_warn(const char *fmt, ...)
174 __attribute__((__format__(__printf__, 1, 2)));
175 static void maybe_warnx(const char *fmt, ...)
176 __attribute__((__format__(__printf__, 1, 2)));
177 static enum filetype file_gettype(u_char *);
178 #ifdef SMALL
179 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
180 #endif
181 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
182 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
183 static off_t file_compress(char *, char *, size_t);
184 static off_t file_uncompress(char *, char *, size_t);
185 static void handle_pathname(char *);
186 static void handle_file(char *, struct stat *);
187 static void handle_stdin(void);
188 static void handle_stdout(void);
189 static void print_ratio(off_t, off_t, FILE *);
190 static void print_list(int fd, off_t, const char *, time_t);
191 static void usage(void);
192 static void display_version(void);
193 static const suffixes_t *check_suffix(char *, int);
194
195 #ifdef SMALL
196 #define unlink_input(f, sb) unlink(f)
197 #else
198 static off_t cat_fd(unsigned char *, ssize_t, off_t *, int fd);
199 static void prepend_gzip(char *, int *, char ***);
200 static void handle_dir(char *);
201 static void print_verbage(const char *, const char *, off_t, off_t);
202 static void print_test(const char *, int);
203 static void copymodes(const char *, struct stat *);
204 static int check_outfile(const char *outfile, struct stat *sb);
205 #endif
206
207 #ifndef NO_BZIP2_SUPPORT
208 static off_t unbzip2(int, int, char *, size_t, off_t *);
209 #endif
210
211 #ifndef NO_COMPRESS_SUPPORT
212 static FILE *zdopen(int);
213 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
214 #endif
215
216 int main(int, char *p[]);
217
218 #ifdef SMALL
219 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
220 #else
221 static const struct option longopts[] = {
222 { "stdout", no_argument, 0, 'c' },
223 { "to-stdout", no_argument, 0, 'c' },
224 { "decompress", no_argument, 0, 'd' },
225 { "uncompress", no_argument, 0, 'd' },
226 { "force", no_argument, 0, 'f' },
227 { "help", no_argument, 0, 'h' },
228 { "keep", no_argument, 0, 'k' },
229 { "list", no_argument, 0, 'l' },
230 { "no-name", no_argument, 0, 'n' },
231 { "name", no_argument, 0, 'N' },
232 { "quiet", no_argument, 0, 'q' },
233 { "recursive", no_argument, 0, 'r' },
234 { "suffix", required_argument, 0, 'S' },
235 { "test", no_argument, 0, 't' },
236 { "verbose", no_argument, 0, 'v' },
237 { "version", no_argument, 0, 'V' },
238 { "fast", no_argument, 0, '1' },
239 { "best", no_argument, 0, '9' },
240 #if 0
241 /*
242 * This is what else GNU gzip implements. --ascii isn't useful
243 * on NetBSD, and I don't care to have a --license.
244 */
245 { "ascii", no_argument, 0, 'a' },
246 { "license", no_argument, 0, 'L' },
247 #endif
248 { NULL, no_argument, 0, 0 },
249 };
250 #endif
251
252 int
253 main(int argc, char **argv)
254 {
255 const char *progname = getprogname();
256 #ifndef SMALL
257 char *gzip;
258 int len;
259 #endif
260 int ch;
261
262 /* XXX set up signals */
263
264 #ifndef SMALL
265 if ((gzip = getenv("GZIP")) != NULL)
266 prepend_gzip(gzip, &argc, &argv);
267 #endif
268
269 /*
270 * XXX
271 * handle being called `gunzip', `zcat' and `gzcat'
272 */
273 if (strcmp(progname, "gunzip") == 0)
274 dflag = 1;
275 else if (strcmp(progname, "zcat") == 0 ||
276 strcmp(progname, "gzcat") == 0)
277 dflag = cflag = 1;
278
279 #ifdef SMALL
280 #define OPT_LIST "cdhHltV123456789"
281 #else
282 #define OPT_LIST "cdfhHklnNqrS:tvV123456789"
283 #endif
284
285 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
286 switch (ch) {
287 case 'c':
288 cflag = 1;
289 break;
290 case 'd':
291 dflag = 1;
292 break;
293 case 'l':
294 lflag = 1;
295 dflag = 1;
296 break;
297 case 'V':
298 display_version();
299 /* NOTREACHED */
300 case '1': case '2': case '3':
301 case '4': case '5': case '6':
302 case '7': case '8': case '9':
303 numflag = ch - '0';
304 break;
305 #ifndef SMALL
306 case 'f':
307 fflag = 1;
308 break;
309 case 'k':
310 kflag = 1;
311 break;
312 case 'n':
313 nflag = 1;
314 Nflag = 0;
315 break;
316 case 'N':
317 nflag = 0;
318 Nflag = 1;
319 break;
320 case 'q':
321 qflag = 1;
322 break;
323 case 'r':
324 rflag = 1;
325 break;
326 case 'S':
327 len = strlen(optarg);
328 if (len != 0) {
329 suffixes[0].zipped = optarg;
330 suffixes[0].ziplen = len;
331 } else {
332 suffixes[NUM_SUFFIXES - 1].zipped = "";
333 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
334 }
335 break;
336 case 't':
337 cflag = 1;
338 tflag = 1;
339 dflag = 1;
340 break;
341 case 'v':
342 vflag = 1;
343 break;
344 #endif
345 default:
346 usage();
347 /* NOTREACHED */
348 }
349 }
350 argv += optind;
351 argc -= optind;
352
353 if (argc == 0) {
354 if (dflag) /* stdin mode */
355 handle_stdin();
356 else /* stdout mode */
357 handle_stdout();
358 } else {
359 do {
360 handle_pathname(argv[0]);
361 } while (*++argv);
362 }
363 #ifndef SMALL
364 if (qflag == 0 && lflag && argc > 1)
365 print_list(-1, 0, "(totals)", 0);
366 #endif
367 exit(exit_value);
368 }
369
370 /* maybe print a warning */
371 void
372 maybe_warn(const char *fmt, ...)
373 {
374 va_list ap;
375
376 if (qflag == 0) {
377 va_start(ap, fmt);
378 vwarn(fmt, ap);
379 va_end(ap);
380 }
381 if (exit_value == 0)
382 exit_value = 1;
383 }
384
385 /* ... without an errno. */
386 void
387 maybe_warnx(const char *fmt, ...)
388 {
389 va_list ap;
390
391 if (qflag == 0) {
392 va_start(ap, fmt);
393 vwarnx(fmt, ap);
394 va_end(ap);
395 }
396 if (exit_value == 0)
397 exit_value = 1;
398 }
399
400 /* maybe print an error */
401 void
402 maybe_err(const char *fmt, ...)
403 {
404 va_list ap;
405
406 if (qflag == 0) {
407 va_start(ap, fmt);
408 vwarn(fmt, ap);
409 va_end(ap);
410 }
411 exit(2);
412 }
413
414 #ifndef NO_BZIP2_SUPPORT
415 /* ... without an errno. */
416 void
417 maybe_errx(const char *fmt, ...)
418 {
419 va_list ap;
420
421 if (qflag == 0) {
422 va_start(ap, fmt);
423 vwarnx(fmt, ap);
424 va_end(ap);
425 }
426 exit(2);
427 }
428 #endif
429
430 #ifndef SMALL
431 /* split up $GZIP and prepend it to the argument list */
432 static void
433 prepend_gzip(char *gzip, int *argc, char ***argv)
434 {
435 char *s, **nargv, **ac;
436 int nenvarg = 0, i;
437
438 /* scan how many arguments there are */
439 for (s = gzip;;) {
440 while (*s == ' ' || *s == '\t')
441 s++;
442 if (*s == 0)
443 goto count_done;
444 nenvarg++;
445 while (*s != ' ' && *s != '\t')
446 if (*s++ == 0)
447 goto count_done;
448 }
449 count_done:
450 /* punt early */
451 if (nenvarg == 0)
452 return;
453
454 *argc += nenvarg;
455 ac = *argv;
456
457 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
458 if (nargv == NULL)
459 maybe_err("malloc");
460
461 /* stash this away */
462 *argv = nargv;
463
464 /* copy the program name first */
465 i = 0;
466 nargv[i++] = *(ac++);
467
468 /* take a copy of $GZIP and add it to the array */
469 s = strdup(gzip);
470 if (s == NULL)
471 maybe_err("strdup");
472 for (;;) {
473 /* Skip whitespaces. */
474 while (*s == ' ' || *s == '\t')
475 s++;
476 if (*s == 0)
477 goto copy_done;
478 nargv[i++] = s;
479 /* Find the end of this argument. */
480 while (*s != ' ' && *s != '\t')
481 if (*s++ == 0)
482 /* Argument followed by NUL. */
483 goto copy_done;
484 /* Terminate by overwriting ' ' or '\t' with NUL. */
485 *s++ = 0;
486 }
487 copy_done:
488
489 /* copy the original arguments and a NULL */
490 while (*ac)
491 nargv[i++] = *(ac++);
492 nargv[i] = NULL;
493 }
494 #endif
495
496 /* compress input to output. Return bytes read, -1 on error */
497 static off_t
498 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
499 {
500 z_stream z;
501 char *outbufp, *inbufp;
502 off_t in_tot = 0, out_tot = 0;
503 ssize_t in_size;
504 int i, error;
505 uLong crc;
506 #ifdef SMALL
507 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
508 0, 0, 0, 0,
509 0, OS_CODE };
510 #endif
511
512 outbufp = malloc(BUFLEN);
513 inbufp = malloc(BUFLEN);
514 if (outbufp == NULL || inbufp == NULL) {
515 maybe_err("malloc failed");
516 goto out;
517 }
518
519 memset(&z, 0, sizeof z);
520 z.zalloc = Z_NULL;
521 z.zfree = Z_NULL;
522 z.opaque = 0;
523
524 #ifdef SMALL
525 memcpy(outbufp, header, sizeof header);
526 i = sizeof header;
527 #else
528 if (nflag != 0) {
529 mtime = 0;
530 origname = "";
531 }
532
533 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
534 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
535 *origname ? ORIG_NAME : 0,
536 mtime & 0xff,
537 (mtime >> 8) & 0xff,
538 (mtime >> 16) & 0xff,
539 (mtime >> 24) & 0xff,
540 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
541 OS_CODE, origname);
542 if (i >= BUFLEN)
543 /* this need PATH_MAX > BUFLEN ... */
544 maybe_err("snprintf");
545 if (*origname)
546 i++;
547 #endif
548
549 z.next_out = outbufp + i;
550 z.avail_out = BUFLEN - i;
551
552 error = deflateInit2(&z, numflag, Z_DEFLATED,
553 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
554 if (error != Z_OK) {
555 maybe_warnx("deflateInit2 failed");
556 in_tot = -1;
557 goto out;
558 }
559
560 crc = crc32(0L, Z_NULL, 0);
561 for (;;) {
562 if (z.avail_out == 0) {
563 if (write(out, outbufp, BUFLEN) != BUFLEN) {
564 maybe_warn("write");
565 in_tot = -1;
566 goto out;
567 }
568
569 out_tot += BUFLEN;
570 z.next_out = outbufp;
571 z.avail_out = BUFLEN;
572 }
573
574 if (z.avail_in == 0) {
575 in_size = read(in, inbufp, BUFLEN);
576 if (in_size < 0) {
577 maybe_warn("read");
578 in_tot = -1;
579 goto out;
580 }
581 if (in_size == 0)
582 break;
583
584 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
585 in_tot += in_size;
586 z.next_in = inbufp;
587 z.avail_in = in_size;
588 }
589
590 error = deflate(&z, Z_NO_FLUSH);
591 if (error != Z_OK && error != Z_STREAM_END) {
592 maybe_warnx("deflate failed");
593 in_tot = -1;
594 goto out;
595 }
596 }
597
598 /* clean up */
599 for (;;) {
600 ssize_t len;
601
602 error = deflate(&z, Z_FINISH);
603 if (error != Z_OK && error != Z_STREAM_END) {
604 maybe_warnx("deflate failed");
605 in_tot = -1;
606 goto out;
607 }
608
609 len = (char *)z.next_out - outbufp;
610
611 if (write(out, outbufp, len) != len) {
612 maybe_warn("write");
613 out_tot = -1;
614 goto out;
615 }
616 out_tot += len;
617 z.next_out = outbufp;
618 z.avail_out = BUFLEN;
619
620 if (error == Z_STREAM_END)
621 break;
622 }
623
624 if (deflateEnd(&z) != Z_OK) {
625 maybe_warnx("deflateEnd failed");
626 in_tot = -1;
627 goto out;
628 }
629
630 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
631 (int)crc & 0xff,
632 (int)(crc >> 8) & 0xff,
633 (int)(crc >> 16) & 0xff,
634 (int)(crc >> 24) & 0xff,
635 (int)in_tot & 0xff,
636 (int)(in_tot >> 8) & 0xff,
637 (int)(in_tot >> 16) & 0xff,
638 (int)(in_tot >> 24) & 0xff);
639 if (i != 8)
640 maybe_err("snprintf");
641 if (write(out, outbufp, i) != i) {
642 maybe_warn("write");
643 in_tot = -1;
644 } else
645 out_tot += i;
646
647 out:
648 if (inbufp != NULL)
649 free(inbufp);
650 if (outbufp != NULL)
651 free(outbufp);
652 if (gsizep)
653 *gsizep = out_tot;
654 return in_tot;
655 }
656
657 /*
658 * uncompress input to output then close the input. return the
659 * uncompressed size written, and put the compressed sized read
660 * into `*gsizep'.
661 */
662 static off_t
663 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
664 const char *filename)
665 {
666 z_stream z;
667 char *outbufp, *inbufp;
668 off_t out_tot = prelen, in_tot = 0;
669 uint32_t out_sub_tot = 0;
670 enum {
671 GZSTATE_MAGIC0,
672 GZSTATE_MAGIC1,
673 GZSTATE_METHOD,
674 GZSTATE_FLAGS,
675 GZSTATE_SKIPPING,
676 GZSTATE_EXTRA,
677 GZSTATE_EXTRA2,
678 GZSTATE_EXTRA3,
679 GZSTATE_ORIGNAME,
680 GZSTATE_COMMENT,
681 GZSTATE_HEAD_CRC1,
682 GZSTATE_HEAD_CRC2,
683 GZSTATE_INIT,
684 GZSTATE_READ,
685 GZSTATE_CRC,
686 GZSTATE_LEN,
687 } state = GZSTATE_MAGIC0;
688 int flags = 0, skip_count = 0;
689 int error = 0, done_reading = 0;
690 uLong crc = 0;
691 ssize_t wr;
692
693 #define ADVANCE() { z.next_in++; z.avail_in--; }
694
695 if ((outbufp = malloc(BUFLEN)) == NULL) {
696 maybe_err("malloc failed");
697 goto out2;
698 }
699 if ((inbufp = malloc(BUFLEN)) == NULL) {
700 maybe_err("malloc failed");
701 goto out1;
702 }
703
704 memset(&z, 0, sizeof z);
705 z.avail_in = prelen;
706 z.next_in = pre;
707 z.avail_out = BUFLEN;
708 z.next_out = outbufp;
709 z.zalloc = NULL;
710 z.zfree = NULL;
711 z.opaque = 0;
712
713
714 for (;;) {
715 if (z.avail_in == 0 && done_reading == 0) {
716 ssize_t in_size = read(in, inbufp, BUFLEN);
717
718 if (in_size == -1) {
719 #ifndef SMALL
720 if (tflag && vflag)
721 print_test(filename, 0);
722 #endif
723 maybe_warn("failed to read stdin");
724 out_tot = -1;
725 goto stop;
726 } else if (in_size == 0)
727 done_reading = 1;
728
729 z.avail_in = in_size;
730 z.next_in = inbufp;
731
732 in_tot += in_size;
733 }
734 if (z.avail_in == 0) {
735 if (done_reading && state != GZSTATE_MAGIC0)
736 maybe_warnx("%s: unexpected end of file",
737 filename);
738 goto stop;
739 }
740 switch (state) {
741 case GZSTATE_MAGIC0:
742 if (*z.next_in != GZIP_MAGIC0) {
743 maybe_warnx("input not gziped (MAGIC0)");
744 out_tot = -1;
745 goto stop;
746 }
747 ADVANCE();
748 state++;
749 out_sub_tot = 0;
750 crc = crc32(0L, Z_NULL, 0);
751 break;
752
753 case GZSTATE_MAGIC1:
754 if (*z.next_in != GZIP_MAGIC1 &&
755 *z.next_in != GZIP_OMAGIC1) {
756 maybe_warnx("input not gziped (MAGIC1)");
757 out_tot = -1;
758 goto stop;
759 }
760 ADVANCE();
761 state++;
762 break;
763
764 case GZSTATE_METHOD:
765 if (*z.next_in != Z_DEFLATED) {
766 maybe_warnx("unknown compression method");
767 out_tot = -1;
768 goto stop;
769 }
770 ADVANCE();
771 state++;
772 break;
773
774 case GZSTATE_FLAGS:
775 flags = *z.next_in;
776 ADVANCE();
777 skip_count = 6;
778 state++;
779 break;
780
781 case GZSTATE_SKIPPING:
782 if (skip_count > 0) {
783 skip_count--;
784 ADVANCE();
785 } else
786 state++;
787 break;
788
789 case GZSTATE_EXTRA:
790 if ((flags & EXTRA_FIELD) == 0) {
791 state = GZSTATE_ORIGNAME;
792 break;
793 }
794 skip_count = *z.next_in;
795 ADVANCE();
796 state++;
797 break;
798
799 case GZSTATE_EXTRA2:
800 skip_count |= ((*z.next_in) << 8);
801 ADVANCE();
802 state++;
803 break;
804
805 case GZSTATE_EXTRA3:
806 if (skip_count > 0) {
807 skip_count--;
808 ADVANCE();
809 } else
810 state++;
811 break;
812
813 case GZSTATE_ORIGNAME:
814 if ((flags & ORIG_NAME) == 0) {
815 state++;
816 break;
817 }
818 if (*z.next_in == 0)
819 state++;
820 ADVANCE();
821 break;
822
823 case GZSTATE_COMMENT:
824 if ((flags & COMMENT) == 0) {
825 state++;
826 break;
827 }
828 if (*z.next_in == 0)
829 state++;
830 ADVANCE();
831 break;
832
833 case GZSTATE_HEAD_CRC1:
834 if (flags & HEAD_CRC)
835 skip_count = 2;
836 else
837 skip_count = 0;
838 state++;
839 break;
840
841 case GZSTATE_HEAD_CRC2:
842 if (skip_count > 0) {
843 skip_count--;
844 ADVANCE();
845 } else
846 state++;
847 break;
848
849 case GZSTATE_INIT:
850 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
851 maybe_warnx("failed to inflateInit");
852 out_tot = -1;
853 goto stop;
854 }
855 state++;
856 break;
857
858 case GZSTATE_READ:
859 error = inflate(&z, Z_FINISH);
860 /* Z_BUF_ERROR goes with Z_FINISH... */
861 if (error != Z_STREAM_END && error != Z_BUF_ERROR)
862 /* Just need more input */
863 break;
864 wr = BUFLEN - z.avail_out;
865
866 if (wr != 0) {
867 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
868 if (
869 #ifndef SMALL
870 /* don't write anything with -t */
871 tflag == 0 &&
872 #endif
873 write(out, outbufp, wr) != wr) {
874 maybe_warn("error writing to output");
875 out_tot = -1;
876 goto stop;
877 }
878
879 out_tot += wr;
880 out_sub_tot += wr;
881 }
882
883 if (error == Z_STREAM_END) {
884 inflateEnd(&z);
885 state++;
886 }
887
888 z.next_out = outbufp;
889 z.avail_out = BUFLEN;
890
891 break;
892 case GZSTATE_CRC:
893 {
894 static int empty_buffer = 0;
895 uLong origcrc;
896
897 if (z.avail_in < 4) {
898 if (!done_reading && empty_buffer++ < 4)
899 continue;
900 maybe_warnx("truncated input");
901 out_tot = -1;
902 goto stop;
903 }
904 empty_buffer = 0;
905 origcrc = ((unsigned)z.next_in[0] & 0xff) |
906 ((unsigned)z.next_in[1] & 0xff) << 8 |
907 ((unsigned)z.next_in[2] & 0xff) << 16 |
908 ((unsigned)z.next_in[3] & 0xff) << 24;
909 if (origcrc != crc) {
910 maybe_warnx("invalid compressed"
911 " data--crc error");
912 out_tot = -1;
913 goto stop;
914 }
915 }
916
917 z.avail_in -= 4;
918 z.next_in += 4;
919
920 if (!z.avail_in)
921 goto stop;
922 state++;
923 break;
924 case GZSTATE_LEN:
925 {
926 static int empty_buffer = 0;
927 uLong origlen;
928
929 if (z.avail_in < 4) {
930 if (!done_reading && empty_buffer++ < 4)
931 continue;
932 maybe_warnx("truncated input");
933 out_tot = -1;
934 goto stop;
935 }
936 empty_buffer = 0;
937 origlen = ((unsigned)z.next_in[0] & 0xff) |
938 ((unsigned)z.next_in[1] & 0xff) << 8 |
939 ((unsigned)z.next_in[2] & 0xff) << 16 |
940 ((unsigned)z.next_in[3] & 0xff) << 24;
941
942 if (origlen != out_sub_tot) {
943 maybe_warnx("invalid compressed"
944 " data--length error");
945 out_tot = -1;
946 goto stop;
947 }
948 }
949
950 z.avail_in -= 4;
951 z.next_in += 4;
952
953 if (error < 0) {
954 maybe_warnx("decompression error");
955 out_tot = -1;
956 goto stop;
957 }
958 state = GZSTATE_MAGIC0;
959 break;
960 }
961 continue;
962 stop:
963 break;
964 }
965 if (state > GZSTATE_INIT)
966 inflateEnd(&z);
967
968 #ifndef SMALL
969 if (tflag && vflag)
970 print_test(filename, out_tot != -1);
971 #endif
972
973 free(inbufp);
974 out1:
975 free(outbufp);
976 out2:
977 if (gsizep)
978 *gsizep = in_tot;
979 return (out_tot);
980 }
981
982 #ifndef SMALL
983 /*
984 * set the owner, mode, flags & utimes for a file
985 */
986 static void
987 copymodes(const char *file, struct stat *sbp)
988 {
989 struct timeval times[2];
990
991 /*
992 * If we have no info on the input, give this file some
993 * default values and return..
994 */
995 if (sbp == NULL) {
996 mode_t mask = umask(022);
997
998 (void)chmod(file, DEFFILEMODE & ~mask);
999 (void)umask(mask);
1000 return;
1001 }
1002
1003 /* if the chown fails, remove set-id bits as-per compress(1) */
1004 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) {
1005 if (errno != EPERM)
1006 maybe_warn("couldn't chown: %s", file);
1007 sbp->st_mode &= ~(S_ISUID|S_ISGID);
1008 }
1009
1010 /* we only allow set-id and the 9 normal permission bits */
1011 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1012 if (chmod(file, sbp->st_mode) < 0)
1013 maybe_warn("couldn't chmod: %s", file);
1014
1015 /* only try flags if they exist already */
1016 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0)
1017 maybe_warn("couldn't chflags: %s", file);
1018
1019 TIMESPEC_TO_TIMEVAL(&times[0], &sbp->st_atimespec);
1020 TIMESPEC_TO_TIMEVAL(&times[1], &sbp->st_mtimespec);
1021 if (utimes(file, times) < 0)
1022 maybe_warn("couldn't utimes: %s", file);
1023 }
1024 #endif
1025
1026 /* what sort of file is this? */
1027 static enum filetype
1028 file_gettype(u_char *buf)
1029 {
1030
1031 if (buf[0] == GZIP_MAGIC0 &&
1032 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1033 return FT_GZIP;
1034 else
1035 #ifndef NO_BZIP2_SUPPORT
1036 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1037 buf[3] >= '0' && buf[3] <= '9')
1038 return FT_BZIP2;
1039 else
1040 #endif
1041 #ifndef NO_COMPRESS_SUPPORT
1042 if (memcmp(buf, Z_MAGIC, 2) == 0)
1043 return FT_Z;
1044 else
1045 #endif
1046 return FT_UNKNOWN;
1047 }
1048
1049 #ifndef SMALL
1050 /* check the outfile is OK. */
1051 static int
1052 check_outfile(const char *outfile, struct stat *sb)
1053 {
1054 int ok = 1;
1055
1056 if (lflag == 0 && stat(outfile, sb) == 0) {
1057 if (fflag)
1058 unlink(outfile);
1059 else if (isatty(STDIN_FILENO)) {
1060 char ans[10] = { 'n', '\0' }; /* default */
1061
1062 fprintf(stderr, "%s already exists -- do you wish to "
1063 "overwrite (y or n)? " , outfile);
1064 (void)fgets(ans, sizeof(ans) - 1, stdin);
1065 if (ans[0] != 'y' && ans[0] != 'Y') {
1066 fprintf(stderr, "\tnot overwriting\n");
1067 ok = 0;
1068 } else
1069 unlink(outfile);
1070 } else {
1071 maybe_warnx("%s already exists -- skipping", outfile);
1072 ok = 0;
1073 }
1074 }
1075 return ok;
1076 }
1077
1078 static void
1079 unlink_input(const char *file, struct stat *sb)
1080 {
1081 struct stat nsb;
1082
1083 if (kflag)
1084 return;
1085
1086 if (stat(file, &nsb) != 0)
1087 /* Must be gone alrady */
1088 return;
1089 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1090 /* Definitely a different file */
1091 return;
1092 unlink(file);
1093 }
1094 #endif
1095
1096 static const suffixes_t *
1097 check_suffix(char *file, int xlate)
1098 {
1099 const suffixes_t *s;
1100 int len = strlen(file);
1101 char *sp;
1102
1103 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1104 /* if it doesn't fit in "a.suf", don't bother */
1105 if (s->ziplen >= len)
1106 continue;
1107 sp = file + len - s->ziplen;
1108 if (strcmp(s->zipped, sp) != 0)
1109 continue;
1110 if (xlate)
1111 strcpy(sp, s->normal);
1112 return s;
1113 }
1114 return NULL;
1115 }
1116
1117 /*
1118 * compress the given file: create a corresponding .gz file and remove the
1119 * original.
1120 */
1121 static off_t
1122 file_compress(char *file, char *outfile, size_t outsize)
1123 {
1124 int in;
1125 int out;
1126 off_t size, insize;
1127 #ifndef SMALL
1128 struct stat isb, osb;
1129 const suffixes_t *suff;
1130 #endif
1131
1132 in = open(file, O_RDONLY);
1133 if (in == -1) {
1134 maybe_warn("can't open %s", file);
1135 return -1;
1136 }
1137
1138 if (cflag == 0) {
1139 #ifndef SMALL
1140 if (stat(file, &isb) == 0) {
1141 if (isb.st_nlink > 1 && fflag == 0) {
1142 maybe_warnx("%s has %d other link%s -- "
1143 "skipping", file, isb.st_nlink - 1,
1144 isb.st_nlink == 1 ? "" : "s");
1145 close(in);
1146 return -1;
1147 }
1148 }
1149
1150 if (fflag == 0 && (suff = check_suffix(file, 0))
1151 && suff->zipped[0] != 0) {
1152 maybe_warnx("%s already has %s suffix -- unchanged",
1153 file, suff->zipped);
1154 close(in);
1155 return -1;
1156 }
1157 #endif
1158
1159 /* Add (usually) .gz to filename */
1160 if ((size_t)snprintf(outfile, outsize, "%s%s",
1161 file, suffixes[0].zipped) >= outsize)
1162 memcpy(outfile - suffixes[0].ziplen - 1,
1163 suffixes[0].zipped, suffixes[0].ziplen + 1);
1164
1165 #ifndef SMALL
1166 if (check_outfile(outfile, &osb) == 0) {
1167 close(in);
1168 return -1;
1169 }
1170 #endif
1171 }
1172
1173 if (cflag == 0) {
1174 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1175 if (out == -1) {
1176 maybe_warn("could not create output: %s", outfile);
1177 fclose(stdin);
1178 return -1;
1179 }
1180 } else
1181 out = STDOUT_FILENO;
1182
1183 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1184
1185 (void)close(in);
1186
1187 /*
1188 * If there was an error, insize will be -1.
1189 * If we compressed to stdout, just return the size.
1190 * Otherwise stat the file and check it is the correct size.
1191 * We only blow away the file if we can stat the output and it
1192 * has the expected size.
1193 */
1194 if (cflag != 0)
1195 return insize == -1 ? -1 : size;
1196
1197 if (close(out) == -1)
1198 maybe_warn("couldn't close ouput");
1199
1200 #ifndef SMALL
1201 if (stat(outfile, &osb) < 0) {
1202 maybe_warn("couldn't stat: %s", outfile);
1203 goto bad_outfile;
1204 }
1205
1206 if (osb.st_size != size) {
1207 maybe_warnx("output file: %s wrong size (%" PRIdOFF
1208 " != %" PRIdOFF "), deleting",
1209 outfile, osb.st_size, size);
1210 goto bad_outfile;
1211 }
1212
1213 copymodes(outfile, &isb);
1214 #endif
1215
1216 /* output is good, ok to delete input */
1217 unlink_input(file, &isb);
1218 return size;
1219
1220 #ifndef SMALL
1221 bad_outfile:
1222 maybe_warnx("leaving original %s", file);
1223 unlink(outfile);
1224 return size;
1225 #endif
1226 }
1227
1228 /* uncompress the given file and remove the original */
1229 static off_t
1230 file_uncompress(char *file, char *outfile, size_t outsize)
1231 {
1232 struct stat isb, osb;
1233 off_t size;
1234 ssize_t rbytes;
1235 unsigned char header1[4];
1236 enum filetype method;
1237 int fd, zfd = -1;
1238 #ifndef SMALL
1239 time_t timestamp = 0;
1240 unsigned char name[PATH_MAX + 1];
1241 #endif
1242
1243 /* gather the old name info */
1244
1245 fd = open(file, O_RDONLY);
1246 if (fd < 0) {
1247 maybe_warn("can't open %s", file);
1248 goto lose;
1249 }
1250
1251 strlcpy(outfile, file, outsize);
1252 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1253 maybe_warnx("%s: unknown suffix -- ignored", file);
1254 goto lose;
1255 }
1256
1257 rbytes = read(fd, header1, sizeof header1);
1258 if (rbytes != sizeof header1) {
1259 /* we don't want to fail here. */
1260 #ifndef SMALL
1261 if (fflag)
1262 goto lose;
1263 #endif
1264 if (rbytes == -1)
1265 maybe_warn("can't read %s", file);
1266 else
1267 maybe_warnx("%s: unexpected end of file", file);
1268 goto lose;
1269 }
1270
1271 method = file_gettype(header1);
1272
1273 #ifndef SMALL
1274 if (fflag == 0 && method == FT_UNKNOWN) {
1275 maybe_warnx("%s: not in gzip format", file);
1276 goto lose;
1277 }
1278
1279 #endif
1280
1281 #ifndef SMALL
1282 if (method == FT_GZIP && Nflag) {
1283 unsigned char ts[4]; /* timestamp */
1284
1285 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) {
1286 if (!fflag)
1287 maybe_warn("can't read %s", file);
1288 goto lose;
1289 }
1290 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1291
1292 if (header1[3] & ORIG_NAME) {
1293 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
1294 if (rbytes < 0) {
1295 maybe_warn("can't read %s", file);
1296 goto lose;
1297 }
1298 if (name[0] != 0) {
1299 /* preserve original directory name */
1300 char *dp = strrchr(file, '/');
1301 if (dp == NULL)
1302 dp = file;
1303 else
1304 dp++;
1305 snprintf(outfile, outsize, "%.*s%.*s",
1306 (int) (dp - file),
1307 file, (int) rbytes, name);
1308 }
1309 }
1310 }
1311 #endif
1312 lseek(fd, 0, SEEK_SET);
1313
1314 if (cflag == 0 || lflag) {
1315 if (fstat(fd, &isb) != 0)
1316 goto lose;
1317 #ifndef SMALL
1318 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1319 maybe_warnx("%s has %d other links -- skipping",
1320 file, isb.st_nlink - 1);
1321 goto lose;
1322 }
1323 if (nflag == 0 && timestamp)
1324 isb.st_mtime = timestamp;
1325 if (check_outfile(outfile, &osb) == 0)
1326 goto lose;
1327 #endif
1328 }
1329
1330 if (cflag == 0 && lflag == 0) {
1331 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1332 if (zfd == STDOUT_FILENO) {
1333 /* We won't close STDOUT_FILENO later... */
1334 zfd = dup(zfd);
1335 close(STDOUT_FILENO);
1336 }
1337 if (zfd == -1) {
1338 maybe_warn("can't open %s", outfile);
1339 goto lose;
1340 }
1341 } else
1342 zfd = STDOUT_FILENO;
1343
1344 #ifndef NO_BZIP2_SUPPORT
1345 if (method == FT_BZIP2) {
1346
1347 /* XXX */
1348 if (lflag) {
1349 maybe_warnx("no -l with bzip2 files");
1350 goto lose;
1351 }
1352
1353 size = unbzip2(fd, zfd, NULL, 0, NULL);
1354 } else
1355 #endif
1356
1357 #ifndef NO_COMPRESS_SUPPORT
1358 if (method == FT_Z) {
1359 FILE *in, *out;
1360
1361 /* XXX */
1362 if (lflag) {
1363 maybe_warnx("no -l with Lempel-Ziv files");
1364 goto lose;
1365 }
1366
1367 if ((in = zdopen(fd)) == NULL) {
1368 maybe_warn("zdopen for read: %s", file);
1369 goto lose;
1370 }
1371
1372 out = fdopen(dup(zfd), "w");
1373 if (out == NULL) {
1374 maybe_warn("fdopen for write: %s", outfile);
1375 fclose(in);
1376 goto lose;
1377 }
1378
1379 size = zuncompress(in, out, NULL, 0, NULL);
1380 /* need to fclose() if ferror() is true... */
1381 if (ferror(in) | fclose(in)) {
1382 maybe_warn("failed infile fclose");
1383 unlink(outfile);
1384 (void)fclose(out);
1385 }
1386 if (fclose(out) != 0) {
1387 maybe_warn("failed outfile fclose");
1388 unlink(outfile);
1389 goto lose;
1390 }
1391 } else
1392 #endif
1393
1394 #ifndef SMALL
1395 if (method == FT_UNKNOWN) {
1396 if (lflag) {
1397 maybe_warnx("no -l for unknown filetypes");
1398 goto lose;
1399 }
1400 size = cat_fd(NULL, 0, NULL, fd);
1401 } else
1402 #endif
1403 {
1404 if (lflag) {
1405 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1406 close(fd);
1407 return -1; /* XXX */
1408 }
1409
1410 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1411 }
1412
1413 if (close(fd) != 0)
1414 maybe_warn("couldn't close input");
1415 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1416 maybe_warn("couldn't close output");
1417
1418 if (size == -1) {
1419 if (cflag == 0)
1420 unlink(outfile);
1421 maybe_warnx("%s: uncompress failed", file);
1422 return -1;
1423 }
1424
1425 /* if testing, or we uncompressed to stdout, this is all we need */
1426 #ifndef SMALL
1427 if (tflag)
1428 return size;
1429 #endif
1430 /* if we are uncompressing to stdin, don't remove the file. */
1431 if (cflag)
1432 return size;
1433
1434 /*
1435 * if we create a file...
1436 */
1437 /*
1438 * if we can't stat the file don't remove the file.
1439 */
1440 if (stat(outfile, &osb) < 0) {
1441 maybe_warn("couldn't stat (leaving original): %s",
1442 outfile);
1443 return -1;
1444 }
1445 if (osb.st_size != size) {
1446 maybe_warn("stat gave different size: %" PRIdOFF
1447 " != %" PRIdOFF " (leaving original)",
1448 size, osb.st_size);
1449 unlink(outfile);
1450 return -1;
1451 }
1452 unlink_input(file, &isb);
1453 #ifndef SMALL
1454 copymodes(outfile, &isb);
1455 #endif
1456 return size;
1457
1458 lose:
1459 if (fd != -1)
1460 close(fd);
1461 if (zfd != -1 && zfd != STDOUT_FILENO)
1462 close(fd);
1463 return -1;
1464 }
1465
1466 #ifndef SMALL
1467 static off_t
1468 cat_fd(unsigned char * prepend, ssize_t count, off_t *gsizep, int fd)
1469 {
1470 char buf[BUFLEN];
1471 ssize_t rv;
1472 off_t in_tot;
1473
1474 in_tot = count;
1475 if (write(STDOUT_FILENO, prepend, count) != count) {
1476 maybe_warn("write to stdout");
1477 return -1;
1478 }
1479 for (;;) {
1480 rv = read(fd, buf, sizeof buf);
1481 if (rv == 0)
1482 break;
1483 if (rv < 0) {
1484 maybe_warn("read from fd %d", fd);
1485 break;
1486 }
1487
1488 if (write(STDOUT_FILENO, buf, rv) != rv) {
1489 maybe_warn("write to stdout");
1490 break;
1491 }
1492 in_tot += rv;
1493 }
1494
1495 if (gsizep)
1496 *gsizep = in_tot;
1497 return (in_tot);
1498 }
1499 #endif
1500
1501 static void
1502 handle_stdin(void)
1503 {
1504 unsigned char header1[4];
1505 off_t usize, gsize;
1506 enum filetype method;
1507 #ifndef NO_COMPRESS_SUPPORT
1508 FILE *in;
1509 #endif
1510
1511 #ifndef SMALL
1512 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1513 maybe_warnx("standard input is a terminal -- ignoring");
1514 return;
1515 }
1516 #endif
1517
1518 if (lflag) {
1519 struct stat isb;
1520
1521 /* XXX could read the whole file, etc. */
1522 if (fstat(STDIN_FILENO, &isb) < 0) {
1523 maybe_warn("fstat");
1524 return;
1525 }
1526 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1527 return;
1528 }
1529
1530 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) {
1531 maybe_warn("can't read stdin");
1532 return;
1533 }
1534
1535 method = file_gettype(header1);
1536 switch (method) {
1537 default:
1538 #ifndef SMALL
1539 if (fflag == 0) {
1540 maybe_warnx("unknown compression format");
1541 return;
1542 }
1543 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1544 break;
1545 #endif
1546 case FT_GZIP:
1547 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1548 header1, sizeof header1, &gsize, "(stdin)");
1549 break;
1550 #ifndef NO_BZIP2_SUPPORT
1551 case FT_BZIP2:
1552 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1553 header1, sizeof header1, &gsize);
1554 break;
1555 #endif
1556 #ifndef NO_COMPRESS_SUPPORT
1557 case FT_Z:
1558 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1559 maybe_warnx("zopen of stdin");
1560 return;
1561 }
1562
1563 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
1564 fclose(in);
1565 break;
1566 #endif
1567 }
1568
1569 #ifndef SMALL
1570 if (vflag && !tflag && usize != -1 && gsize != -1)
1571 print_verbage(NULL, NULL, usize, gsize);
1572 #endif
1573
1574 }
1575
1576 static void
1577 handle_stdout(void)
1578 {
1579 off_t gsize, usize;
1580
1581 #ifndef SMALL
1582 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1583 maybe_warnx("standard output is a terminal -- ignoring");
1584 return;
1585 }
1586 #endif
1587 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0);
1588
1589 #ifndef SMALL
1590 if (vflag && !tflag && usize != -1 && gsize != -1)
1591 print_verbage(NULL, NULL, usize, gsize);
1592 #endif
1593 }
1594
1595 /* do what is asked for, for the path name */
1596 static void
1597 handle_pathname(char *path)
1598 {
1599 char *opath = path, *s = NULL;
1600 ssize_t len;
1601 int slen;
1602 struct stat sb;
1603
1604 /* check for stdout/stdin */
1605 if (path[0] == '-' && path[1] == '\0') {
1606 if (dflag)
1607 handle_stdin();
1608 else
1609 handle_stdout();
1610 return;
1611 }
1612
1613 retry:
1614 if (stat(path, &sb) < 0) {
1615 /* lets try <path>.gz if we're decompressing */
1616 if (dflag && s == NULL && errno == ENOENT) {
1617 len = strlen(path);
1618 slen = suffixes[0].ziplen;
1619 s = malloc(len + slen + 1);
1620 if (s == NULL)
1621 maybe_err("malloc");
1622 memcpy(s, path, len);
1623 memcpy(s + len, suffixes[0].zipped, slen + 1);
1624 path = s;
1625 goto retry;
1626 }
1627 maybe_warn("can't stat: %s", opath);
1628 goto out;
1629 }
1630
1631 if (S_ISDIR(sb.st_mode)) {
1632 #ifndef SMALL
1633 if (rflag)
1634 handle_dir(path);
1635 else
1636 #endif
1637 maybe_warnx("%s is a directory", path);
1638 goto out;
1639 }
1640
1641 if (S_ISREG(sb.st_mode))
1642 handle_file(path, &sb);
1643 else
1644 maybe_warnx("%s is not a regular file", path);
1645
1646 out:
1647 if (s)
1648 free(s);
1649 }
1650
1651 /* compress/decompress a file */
1652 static void
1653 handle_file(char *file, struct stat *sbp)
1654 {
1655 off_t usize, gsize;
1656 char outfile[PATH_MAX];
1657
1658 infile = file;
1659 if (dflag) {
1660 usize = file_uncompress(file, outfile, sizeof(outfile));
1661 if (usize == -1)
1662 return;
1663 gsize = sbp->st_size;
1664 } else {
1665 gsize = file_compress(file, outfile, sizeof(outfile));
1666 if (gsize == -1)
1667 return;
1668 usize = sbp->st_size;
1669 }
1670
1671
1672 #ifndef SMALL
1673 if (vflag && !tflag)
1674 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1675 #endif
1676 }
1677
1678 #ifndef SMALL
1679 /* this is used with -r to recursively descend directories */
1680 static void
1681 handle_dir(char *dir)
1682 {
1683 char *path_argv[2];
1684 FTS *fts;
1685 FTSENT *entry;
1686
1687 path_argv[0] = dir;
1688 path_argv[1] = 0;
1689 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
1690 if (fts == NULL) {
1691 warn("couldn't fts_open %s", dir);
1692 return;
1693 }
1694
1695 while ((entry = fts_read(fts))) {
1696 switch(entry->fts_info) {
1697 case FTS_D:
1698 case FTS_DP:
1699 continue;
1700
1701 case FTS_DNR:
1702 case FTS_ERR:
1703 case FTS_NS:
1704 maybe_warn("%s", entry->fts_path);
1705 continue;
1706 case FTS_F:
1707 handle_file(entry->fts_path, entry->fts_statp);
1708 }
1709 }
1710 (void)fts_close(fts);
1711 }
1712 #endif
1713
1714 /* print a ratio - size reduction as a fraction of uncompressed size */
1715 static void
1716 print_ratio(off_t in, off_t out, FILE *where)
1717 {
1718 int percent10; /* 10 * percent */
1719 off_t diff;
1720 char buff[8];
1721 int len;
1722
1723 diff = in - out/2;
1724 if (diff <= 0)
1725 /*
1726 * Output is more than double size of input! print -99.9%
1727 * Quite possibly we've failed to get the original size.
1728 */
1729 percent10 = -999;
1730 else {
1731 /*
1732 * We only need 12 bits of result from the final division,
1733 * so reduce the values until a 32bit division will suffice.
1734 */
1735 while (in > 0x100000) {
1736 diff >>= 1;
1737 in >>= 1;
1738 }
1739 if (in != 0)
1740 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1741 else
1742 percent10 = 0;
1743 }
1744
1745 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1746 /* Move the '.' to before the last digit */
1747 buff[len - 1] = buff[len - 2];
1748 buff[len - 2] = '.';
1749 fprintf(where, "%5s%%", buff);
1750 }
1751
1752 #ifndef SMALL
1753 /* print compression statistics, and the new name (if there is one!) */
1754 static void
1755 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1756 {
1757 if (file)
1758 fprintf(stderr, "%s:%s ", file,
1759 strlen(file) < 7 ? "\t\t" : "\t");
1760 print_ratio(usize, gsize, stderr);
1761 if (nfile)
1762 fprintf(stderr, " -- replaced with %s", nfile);
1763 fprintf(stderr, "\n");
1764 fflush(stderr);
1765 }
1766
1767 /* print test results */
1768 static void
1769 print_test(const char *file, int ok)
1770 {
1771
1772 if (exit_value == 0 && ok == 0)
1773 exit_value = 1;
1774 fprintf(stderr, "%s:%s %s\n", file,
1775 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
1776 fflush(stderr);
1777 }
1778 #endif
1779
1780 /* print a file's info ala --list */
1781 /* eg:
1782 compressed uncompressed ratio uncompressed_name
1783 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
1784 */
1785 static void
1786 print_list(int fd, off_t out, const char *outfile, time_t ts)
1787 {
1788 static int first = 1;
1789 #ifndef SMALL
1790 static off_t in_tot, out_tot;
1791 uint32_t crc = 0;
1792 #endif
1793 off_t in = 0;
1794 int rv;
1795
1796 if (first) {
1797 #ifndef SMALL
1798 if (vflag)
1799 printf("method crc date time ");
1800 #endif
1801 if (qflag == 0)
1802 printf(" compressed uncompressed "
1803 "ratio uncompressed_name\n");
1804 }
1805 first = 0;
1806
1807 /* print totals? */
1808 #ifndef SMALL
1809 if (fd == -1) {
1810 in = in_tot;
1811 out = out_tot;
1812 } else
1813 #endif
1814 {
1815 /* read the last 4 bytes - this is the uncompressed size */
1816 rv = lseek(fd, (off_t)(-8), SEEK_END);
1817 if (rv != -1) {
1818 unsigned char buf[8];
1819 uint32_t usize;
1820
1821 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf))
1822 maybe_warn("read of uncompressed size");
1823 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24;
1824 in = (off_t)usize;
1825 #ifndef SMALL
1826 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24;
1827 #endif
1828 }
1829 }
1830
1831 #ifndef SMALL
1832 if (vflag && fd == -1)
1833 printf(" ");
1834 else if (vflag) {
1835 char *date = ctime(&ts);
1836
1837 /* skip the day, 1/100th second, and year */
1838 date += 4;
1839 date[12] = 0;
1840 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
1841 }
1842 in_tot += in;
1843 out_tot += out;
1844 #endif
1845 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
1846 print_ratio(in, out, stdout);
1847 printf(" %s\n", outfile);
1848 }
1849
1850 /* display the usage of NetBSD gzip */
1851 static void
1852 usage(void)
1853 {
1854
1855 fprintf(stderr, "%s\n", gzip_version);
1856 fprintf(stderr,
1857 #ifdef SMALL
1858 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n",
1859 #else
1860 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
1861 " -c --stdout write to stdout, keep original files\n"
1862 " --to-stdout\n"
1863 " -d --decompress uncompress files\n"
1864 " --uncompress\n"
1865 " -f --force force overwriting & compress links\n"
1866 " -h --help display this help\n"
1867 " -k --keep don't delete input files during operation\n"
1868 " -n --no-name don't save original file name or time stamp\n"
1869 " -N --name save or restore original file name and time stamp\n"
1870 " -q --quiet output no warnings\n"
1871 " -r --recursive recursively compress files in directories\n"
1872 " -S .suf use suffix .suf instead of .gz\n"
1873 " --suffix .suf\n"
1874 " -t --test test compressed file\n"
1875 " -v --verbose print extra statistics\n"
1876 " -V --version display program version\n"
1877 " -1 --fast fastest (worst) compression\n"
1878 " -2 .. -8 set compression level\n"
1879 " -9 --best best (slowest) compression\n",
1880 #endif
1881 getprogname());
1882 exit(0);
1883 }
1884
1885 /* display the version of NetBSD gzip */
1886 static void
1887 display_version(void)
1888 {
1889
1890 fprintf(stderr, "%s\n", gzip_version);
1891 exit(0);
1892 }
1893
1894 #ifndef NO_BZIP2_SUPPORT
1895 #include "unbzip2.c"
1896 #endif
1897 #ifndef NO_COMPRESS_SUPPORT
1898 #include "zuncompress.c"
1899 #endif
DragonFly BSD