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Move acpica-unix-20050309 into the Attic
[dragonfly.git] / usr.bin / gzip / gzip.c
blobde6bda6961206dcaf1ebb7c8facaa127ce01e655
1 /* $NetBSD: gzip.c,v 1.67 2004/09/11 11:07:44 dsl Exp $ */
2 /* $DragonFly: src/usr.bin/gzip/gzip.c,v 1.6 2006/10/25 08:27:27 swildner 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 nflag; /* don't save name/timestamp */
152 static int Nflag; /* don't restore name/timestamp */
153 static int qflag; /* quiet mode */
154 static int rflag; /* recursive mode */
155 static int tflag; /* test */
156 static int vflag; /* verbose mode */
157 #else
158 #define qflag 0
159 #define tflag 0
160 #endif
161
162 static int exit_value = 0; /* exit value */
163
164 static char *infile; /* name of file coming in */
165
166 static void maybe_err(const char *fmt, ...)
167 __attribute__((__format__(__printf__, 1, 2)));
168 #ifndef NO_BZIP2_SUPPORT
169 static void maybe_errx(const char *fmt, ...)
170 __attribute__((__format__(__printf__, 1, 2)));
171 #endif
172 static void maybe_warn(const char *fmt, ...)
173 __attribute__((__format__(__printf__, 1, 2)));
174 static void maybe_warnx(const char *fmt, ...)
175 __attribute__((__format__(__printf__, 1, 2)));
176 static enum filetype file_gettype(u_char *);
177 #ifdef SMALL
178 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
179 #endif
180 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
181 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
182 static off_t file_compress(char *, char *, size_t);
183 static off_t file_uncompress(char *, char *, size_t);
184 static void handle_pathname(char *);
185 static void handle_file(char *, struct stat *);
186 static void handle_stdin(void);
187 static void handle_stdout(void);
188 static void print_ratio(off_t, off_t, FILE *);
189 static void print_list(int fd, off_t, const char *, time_t);
190 static void usage(void);
191 static void display_version(void);
192 static const suffixes_t *check_suffix(char *, int);
193
194 #ifdef SMALL
195 #define unlink_input(f, sb) unlink(f)
196 #else
197 static off_t cat_fd(unsigned char *, ssize_t, off_t *, int fd);
198 static void prepend_gzip(char *, int *, char ***);
199 static void handle_dir(char *);
200 static void print_verbage(const char *, const char *, off_t, off_t);
201 static void print_test(const char *, int);
202 static void copymodes(const char *, struct stat *);
203 static int check_outfile(const char *outfile, struct stat *sb);
204 #endif
205
206 #ifndef NO_BZIP2_SUPPORT
207 static off_t unbzip2(int, int, char *, size_t, off_t *);
208 #endif
209
210 #ifndef NO_COMPRESS_SUPPORT
211 static FILE *zdopen(int);
212 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
213 #endif
214
215 int main(int, char *p[]);
216
217 #ifdef SMALL
218 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
219 #else
220 static const struct option longopts[] = {
221 { "stdout", no_argument, 0, 'c' },
222 { "to-stdout", no_argument, 0, 'c' },
223 { "decompress", no_argument, 0, 'd' },
224 { "uncompress", no_argument, 0, 'd' },
225 { "force", no_argument, 0, 'f' },
226 { "help", no_argument, 0, 'h' },
227 { "list", no_argument, 0, 'l' },
228 { "no-name", no_argument, 0, 'n' },
229 { "name", no_argument, 0, 'N' },
230 { "quiet", no_argument, 0, 'q' },
231 { "recursive", no_argument, 0, 'r' },
232 { "suffix", required_argument, 0, 'S' },
233 { "test", no_argument, 0, 't' },
234 { "verbose", no_argument, 0, 'v' },
235 { "version", no_argument, 0, 'V' },
236 { "fast", no_argument, 0, '1' },
237 { "best", no_argument, 0, '9' },
238 #if 0
239 /*
240 * This is what else GNU gzip implements. --ascii isn't useful
241 * on NetBSD, and I don't care to have a --license.
242 */
243 { "ascii", no_argument, 0, 'a' },
244 { "license", no_argument, 0, 'L' },
245 #endif
246 { NULL, no_argument, 0, 0 },
247 };
248 #endif
249
250 int
251 main(int argc, char **argv)
252 {
253 const char *progname = getprogname();
254 #ifndef SMALL
255 char *gzip;
256 int len;
257 #endif
258 int ch;
259
260 /* XXX set up signals */
261
262 #ifndef SMALL
263 if ((gzip = getenv("GZIP")) != NULL)
264 prepend_gzip(gzip, &argc, &argv);
265 #endif
266
267 /*
268 * XXX
269 * handle being called `gunzip', `zcat' and `gzcat'
270 */
271 if (strcmp(progname, "gunzip") == 0)
272 dflag = 1;
273 else if (strcmp(progname, "zcat") == 0 ||
274 strcmp(progname, "gzcat") == 0)
275 dflag = cflag = 1;
276
277 #ifdef SMALL
278 #define OPT_LIST "cdhHltV123456789"
279 #else
280 #define OPT_LIST "cdfhHlnNqrS:tvV123456789"
281 #endif
282
283 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
284 switch (ch) {
285 case 'c':
286 cflag = 1;
287 break;
288 case 'd':
289 dflag = 1;
290 break;
291 case 'l':
292 lflag = 1;
293 dflag = 1;
294 break;
295 case 'V':
296 display_version();
297 /* NOTREACHED */
298 case '1': case '2': case '3':
299 case '4': case '5': case '6':
300 case '7': case '8': case '9':
301 numflag = ch - '0';
302 break;
303 #ifndef SMALL
304 case 'f':
305 fflag = 1;
306 break;
307 case 'n':
308 nflag = 1;
309 Nflag = 0;
310 break;
311 case 'N':
312 nflag = 0;
313 Nflag = 1;
314 break;
315 case 'q':
316 qflag = 1;
317 break;
318 case 'r':
319 rflag = 1;
320 break;
321 case 'S':
322 len = strlen(optarg);
323 if (len != 0) {
324 suffixes[0].zipped = optarg;
325 suffixes[0].ziplen = len;
326 } else {
327 suffixes[NUM_SUFFIXES - 1].zipped = "";
328 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
329 }
330 break;
331 case 't':
332 cflag = 1;
333 tflag = 1;
334 dflag = 1;
335 break;
336 case 'v':
337 vflag = 1;
338 break;
339 #endif
340 default:
341 usage();
342 /* NOTREACHED */
343 }
344 }
345 argv += optind;
346 argc -= optind;
347
348 if (argc == 0) {
349 if (dflag) /* stdin mode */
350 handle_stdin();
351 else /* stdout mode */
352 handle_stdout();
353 } else {
354 do {
355 handle_pathname(argv[0]);
356 } while (*++argv);
357 }
358 #ifndef SMALL
359 if (qflag == 0 && lflag && argc > 1)
360 print_list(-1, 0, "(totals)", 0);
361 #endif
362 exit(exit_value);
363 }
364
365 /* maybe print a warning */
366 void
367 maybe_warn(const char *fmt, ...)
368 {
369 va_list ap;
370
371 if (qflag == 0) {
372 va_start(ap, fmt);
373 vwarn(fmt, ap);
374 va_end(ap);
375 }
376 if (exit_value == 0)
377 exit_value = 1;
378 }
379
380 /* ... without an errno. */
381 void
382 maybe_warnx(const char *fmt, ...)
383 {
384 va_list ap;
385
386 if (qflag == 0) {
387 va_start(ap, fmt);
388 vwarnx(fmt, ap);
389 va_end(ap);
390 }
391 if (exit_value == 0)
392 exit_value = 1;
393 }
394
395 /* maybe print an error */
396 void
397 maybe_err(const char *fmt, ...)
398 {
399 va_list ap;
400
401 if (qflag == 0) {
402 va_start(ap, fmt);
403 vwarn(fmt, ap);
404 va_end(ap);
405 }
406 exit(2);
407 }
408
409 #ifndef NO_BZIP2_SUPPORT
410 /* ... without an errno. */
411 void
412 maybe_errx(const char *fmt, ...)
413 {
414 va_list ap;
415
416 if (qflag == 0) {
417 va_start(ap, fmt);
418 vwarnx(fmt, ap);
419 va_end(ap);
420 }
421 exit(2);
422 }
423 #endif
424
425 #ifndef SMALL
426 /* split up $GZIP and prepend it to the argument list */
427 static void
428 prepend_gzip(char *gzip, int *argc, char ***argv)
429 {
430 char *s, **nargv, **ac;
431 int nenvarg = 0, i;
432
433 /* scan how many arguments there are */
434 for (s = gzip;;) {
435 while (*s == ' ' || *s == '\t')
436 s++;
437 if (*s == 0)
438 goto count_done;
439 nenvarg++;
440 while (*s != ' ' && *s != '\t')
441 if (*s++ == 0)
442 goto count_done;
443 }
444 count_done:
445 /* punt early */
446 if (nenvarg == 0)
447 return;
448
449 *argc += nenvarg;
450 ac = *argv;
451
452 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
453 if (nargv == NULL)
454 maybe_err("malloc");
455
456 /* stash this away */
457 *argv = nargv;
458
459 /* copy the program name first */
460 i = 0;
461 nargv[i++] = *(ac++);
462
463 /* take a copy of $GZIP and add it to the array */
464 s = strdup(gzip);
465 if (s == NULL)
466 maybe_err("strdup");
467 for (;;) {
468 /* Skip whitespaces. */
469 while (*s == ' ' || *s == '\t')
470 s++;
471 if (*s == 0)
472 goto copy_done;
473 nargv[i++] = s;
474 /* Find the end of this argument. */
475 while (*s != ' ' && *s != '\t')
476 if (*s++ == 0)
477 /* Argument followed by NUL. */
478 goto copy_done;
479 /* Terminate by overwriting ' ' or '\t' with NUL. */
480 *s++ = 0;
481 }
482 copy_done:
483
484 /* copy the original arguments and a NULL */
485 while (*ac)
486 nargv[i++] = *(ac++);
487 nargv[i] = NULL;
488 }
489 #endif
490
491 /* compress input to output. Return bytes read, -1 on error */
492 static off_t
493 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
494 {
495 z_stream z;
496 char *outbufp, *inbufp;
497 off_t in_tot = 0, out_tot = 0;
498 ssize_t in_size;
499 int i, error;
500 uLong crc;
501 #ifdef SMALL
502 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
503 0, 0, 0, 0,
504 0, OS_CODE };
505 #endif
506
507 outbufp = malloc(BUFLEN);
508 inbufp = malloc(BUFLEN);
509 if (outbufp == NULL || inbufp == NULL) {
510 maybe_err("malloc failed");
511 goto out;
512 }
513
514 memset(&z, 0, sizeof z);
515 z.zalloc = Z_NULL;
516 z.zfree = Z_NULL;
517 z.opaque = 0;
518
519 #ifdef SMALL
520 memcpy(outbufp, header, sizeof header);
521 i = sizeof header;
522 #else
523 if (nflag != 0) {
524 mtime = 0;
525 origname = "";
526 }
527
528 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
529 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
530 *origname ? ORIG_NAME : 0,
531 mtime & 0xff,
532 (mtime >> 8) & 0xff,
533 (mtime >> 16) & 0xff,
534 (mtime >> 24) & 0xff,
535 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
536 OS_CODE, origname);
537 if (i >= BUFLEN)
538 /* this need PATH_MAX > BUFLEN ... */
539 maybe_err("snprintf");
540 if (*origname)
541 i++;
542 #endif
543
544 z.next_out = outbufp + i;
545 z.avail_out = BUFLEN - i;
546
547 error = deflateInit2(&z, numflag, Z_DEFLATED,
548 -MAX_WBITS, 8, Z_DEFAULT_STRATEGY);
549 if (error != Z_OK) {
550 maybe_warnx("deflateInit2 failed");
551 in_tot = -1;
552 goto out;
553 }
554
555 crc = crc32(0L, Z_NULL, 0);
556 for (;;) {
557 if (z.avail_out == 0) {
558 if (write(out, outbufp, BUFLEN) != BUFLEN) {
559 maybe_warn("write");
560 in_tot = -1;
561 goto out;
562 }
563
564 out_tot += BUFLEN;
565 z.next_out = outbufp;
566 z.avail_out = BUFLEN;
567 }
568
569 if (z.avail_in == 0) {
570 in_size = read(in, inbufp, BUFLEN);
571 if (in_size < 0) {
572 maybe_warn("read");
573 in_tot = -1;
574 goto out;
575 }
576 if (in_size == 0)
577 break;
578
579 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
580 in_tot += in_size;
581 z.next_in = inbufp;
582 z.avail_in = in_size;
583 }
584
585 error = deflate(&z, Z_NO_FLUSH);
586 if (error != Z_OK && error != Z_STREAM_END) {
587 maybe_warnx("deflate failed");
588 in_tot = -1;
589 goto out;
590 }
591 }
592
593 /* clean up */
594 for (;;) {
595 ssize_t len;
596
597 error = deflate(&z, Z_FINISH);
598 if (error != Z_OK && error != Z_STREAM_END) {
599 maybe_warnx("deflate failed");
600 in_tot = -1;
601 goto out;
602 }
603
604 len = (char *)z.next_out - outbufp;
605
606 if (write(out, outbufp, len) != len) {
607 maybe_warn("write");
608 out_tot = -1;
609 goto out;
610 }
611 out_tot += len;
612 z.next_out = outbufp;
613 z.avail_out = BUFLEN;
614
615 if (error == Z_STREAM_END)
616 break;
617 }
618
619 if (deflateEnd(&z) != Z_OK) {
620 maybe_warnx("deflateEnd failed");
621 in_tot = -1;
622 goto out;
623 }
624
625 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
626 (int)crc & 0xff,
627 (int)(crc >> 8) & 0xff,
628 (int)(crc >> 16) & 0xff,
629 (int)(crc >> 24) & 0xff,
630 (int)in_tot & 0xff,
631 (int)(in_tot >> 8) & 0xff,
632 (int)(in_tot >> 16) & 0xff,
633 (int)(in_tot >> 24) & 0xff);
634 if (i != 8)
635 maybe_err("snprintf");
636 if (write(out, outbufp, i) != i) {
637 maybe_warn("write");
638 in_tot = -1;
639 } else
640 out_tot += i;
641
642 out:
643 if (inbufp != NULL)
644 free(inbufp);
645 if (outbufp != NULL)
646 free(outbufp);
647 if (gsizep)
648 *gsizep = out_tot;
649 return in_tot;
650 }
651
652 /*
653 * uncompress input to output then close the input. return the
654 * uncompressed size written, and put the compressed sized read
655 * into `*gsizep'.
656 */
657 static off_t
658 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
659 const char *filename)
660 {
661 z_stream z;
662 char *outbufp, *inbufp;
663 off_t out_tot = prelen, in_tot = 0;
664 uint32_t out_sub_tot = 0;
665 enum {
666 GZSTATE_MAGIC0,
667 GZSTATE_MAGIC1,
668 GZSTATE_METHOD,
669 GZSTATE_FLAGS,
670 GZSTATE_SKIPPING,
671 GZSTATE_EXTRA,
672 GZSTATE_EXTRA2,
673 GZSTATE_EXTRA3,
674 GZSTATE_ORIGNAME,
675 GZSTATE_COMMENT,
676 GZSTATE_HEAD_CRC1,
677 GZSTATE_HEAD_CRC2,
678 GZSTATE_INIT,
679 GZSTATE_READ,
680 GZSTATE_CRC,
681 GZSTATE_LEN,
682 } state = GZSTATE_MAGIC0;
683 int flags = 0, skip_count = 0;
684 int error = 0, done_reading = 0;
685 uLong crc = 0;
686 ssize_t wr;
687
688 #define ADVANCE() { z.next_in++; z.avail_in--; }
689
690 if ((outbufp = malloc(BUFLEN)) == NULL) {
691 maybe_err("malloc failed");
692 goto out2;
693 }
694 if ((inbufp = malloc(BUFLEN)) == NULL) {
695 maybe_err("malloc failed");
696 goto out1;
697 }
698
699 memset(&z, 0, sizeof z);
700 z.avail_in = prelen;
701 z.next_in = pre;
702 z.avail_out = BUFLEN;
703 z.next_out = outbufp;
704 z.zalloc = NULL;
705 z.zfree = NULL;
706 z.opaque = 0;
707
708
709 for (;;) {
710 if (z.avail_in == 0 && done_reading == 0) {
711 ssize_t in_size = read(in, inbufp, BUFLEN);
712
713 if (in_size == -1) {
714 #ifndef SMALL
715 if (tflag && vflag)
716 print_test(filename, 0);
717 #endif
718 maybe_warn("failed to read stdin");
719 out_tot = -1;
720 goto stop;
721 } else if (in_size == 0)
722 done_reading = 1;
723
724 z.avail_in = in_size;
725 z.next_in = inbufp;
726
727 in_tot += in_size;
728 }
729 if (z.avail_in == 0) {
730 if (done_reading && state != GZSTATE_MAGIC0)
731 maybe_warnx("%s: unexpected end of file",
732 filename);
733 goto stop;
734 }
735 switch (state) {
736 case GZSTATE_MAGIC0:
737 if (*z.next_in != GZIP_MAGIC0) {
738 maybe_warnx("input not gziped (MAGIC0)");
739 out_tot = -1;
740 goto stop;
741 }
742 ADVANCE();
743 state++;
744 out_sub_tot = 0;
745 crc = crc32(0L, Z_NULL, 0);
746 break;
747
748 case GZSTATE_MAGIC1:
749 if (*z.next_in != GZIP_MAGIC1 &&
750 *z.next_in != GZIP_OMAGIC1) {
751 maybe_warnx("input not gziped (MAGIC1)");
752 out_tot = -1;
753 goto stop;
754 }
755 ADVANCE();
756 state++;
757 break;
758
759 case GZSTATE_METHOD:
760 if (*z.next_in != Z_DEFLATED) {
761 maybe_warnx("unknown compression method");
762 out_tot = -1;
763 goto stop;
764 }
765 ADVANCE();
766 state++;
767 break;
768
769 case GZSTATE_FLAGS:
770 flags = *z.next_in;
771 ADVANCE();
772 skip_count = 6;
773 state++;
774 break;
775
776 case GZSTATE_SKIPPING:
777 if (skip_count > 0) {
778 skip_count--;
779 ADVANCE();
780 } else
781 state++;
782 break;
783
784 case GZSTATE_EXTRA:
785 if ((flags & EXTRA_FIELD) == 0) {
786 state = GZSTATE_ORIGNAME;
787 break;
788 }
789 skip_count = *z.next_in;
790 ADVANCE();
791 state++;
792 break;
793
794 case GZSTATE_EXTRA2:
795 skip_count |= ((*z.next_in) << 8);
796 ADVANCE();
797 state++;
798 break;
799
800 case GZSTATE_EXTRA3:
801 if (skip_count > 0) {
802 skip_count--;
803 ADVANCE();
804 } else
805 state++;
806 break;
807
808 case GZSTATE_ORIGNAME:
809 if ((flags & ORIG_NAME) == 0) {
810 state++;
811 break;
812 }
813 if (*z.next_in == 0)
814 state++;
815 ADVANCE();
816 break;
817
818 case GZSTATE_COMMENT:
819 if ((flags & COMMENT) == 0) {
820 state++;
821 break;
822 }
823 if (*z.next_in == 0)
824 state++;
825 ADVANCE();
826 break;
827
828 case GZSTATE_HEAD_CRC1:
829 if (flags & HEAD_CRC)
830 skip_count = 2;
831 else
832 skip_count = 0;
833 state++;
834 break;
835
836 case GZSTATE_HEAD_CRC2:
837 if (skip_count > 0) {
838 skip_count--;
839 ADVANCE();
840 } else
841 state++;
842 break;
843
844 case GZSTATE_INIT:
845 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
846 maybe_warnx("failed to inflateInit");
847 out_tot = -1;
848 goto stop;
849 }
850 state++;
851 break;
852
853 case GZSTATE_READ:
854 error = inflate(&z, Z_FINISH);
855 /* Z_BUF_ERROR goes with Z_FINISH... */
856 if (error != Z_STREAM_END && error != Z_BUF_ERROR)
857 /* Just need more input */
858 break;
859 wr = BUFLEN - z.avail_out;
860
861 if (wr != 0) {
862 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
863 if (
864 #ifndef SMALL
865 /* don't write anything with -t */
866 tflag == 0 &&
867 #endif
868 write(out, outbufp, wr) != wr) {
869 maybe_warn("error writing to output");
870 out_tot = -1;
871 goto stop;
872 }
873
874 out_tot += wr;
875 out_sub_tot += wr;
876 }
877
878 if (error == Z_STREAM_END) {
879 inflateEnd(&z);
880 state++;
881 }
882
883 z.next_out = outbufp;
884 z.avail_out = BUFLEN;
885
886 break;
887 case GZSTATE_CRC:
888 {
889 static int empty_buffer = 0;
890 uLong origcrc;
891
892 if (z.avail_in < 4) {
893 if (!done_reading && empty_buffer++ < 4)
894 continue;
895 maybe_warnx("truncated input");
896 out_tot = -1;
897 goto stop;
898 }
899 empty_buffer = 0;
900 origcrc = ((unsigned)z.next_in[0] & 0xff) |
901 ((unsigned)z.next_in[1] & 0xff) << 8 |
902 ((unsigned)z.next_in[2] & 0xff) << 16 |
903 ((unsigned)z.next_in[3] & 0xff) << 24;
904 if (origcrc != crc) {
905 maybe_warnx("invalid compressed"
906 " data--crc error");
907 out_tot = -1;
908 goto stop;
909 }
910 }
911
912 z.avail_in -= 4;
913 z.next_in += 4;
914
915 if (!z.avail_in)
916 goto stop;
917 state++;
918 break;
919 case GZSTATE_LEN:
920 {
921 static int empty_buffer = 0;
922 uLong origlen;
923
924 if (z.avail_in < 4) {
925 if (!done_reading && empty_buffer++ < 4)
926 continue;
927 maybe_warnx("truncated input");
928 out_tot = -1;
929 goto stop;
930 }
931 empty_buffer = 0;
932 origlen = ((unsigned)z.next_in[0] & 0xff) |
933 ((unsigned)z.next_in[1] & 0xff) << 8 |
934 ((unsigned)z.next_in[2] & 0xff) << 16 |
935 ((unsigned)z.next_in[3] & 0xff) << 24;
936
937 if (origlen != out_sub_tot) {
938 maybe_warnx("invalid compressed"
939 " data--length error");
940 out_tot = -1;
941 goto stop;
942 }
943 }
944
945 z.avail_in -= 4;
946 z.next_in += 4;
947
948 if (error < 0) {
949 maybe_warnx("decompression error");
950 out_tot = -1;
951 goto stop;
952 }
953 state = GZSTATE_MAGIC0;
954 break;
955 }
956 continue;
957 stop:
958 break;
959 }
960 if (state > GZSTATE_INIT)
961 inflateEnd(&z);
962
963 #ifndef SMALL
964 if (tflag && vflag)
965 print_test(filename, out_tot != -1);
966 #endif
967
968 free(inbufp);
969 out1:
970 free(outbufp);
971 out2:
972 if (gsizep)
973 *gsizep = in_tot;
974 return (out_tot);
975 }
976
977 #ifndef SMALL
978 /*
979 * set the owner, mode, flags & utimes for a file
980 */
981 static void
982 copymodes(const char *file, struct stat *sbp)
983 {
984 struct timeval times[2];
985
986 /*
987 * If we have no info on the input, give this file some
988 * default values and return..
989 */
990 if (sbp == NULL) {
991 mode_t mask = umask(022);
992
993 (void)chmod(file, DEFFILEMODE & ~mask);
994 (void)umask(mask);
995 return;
996 }
997
998 /* if the chown fails, remove set-id bits as-per compress(1) */
999 if (chown(file, sbp->st_uid, sbp->st_gid) < 0) {
1000 if (errno != EPERM)
1001 maybe_warn("couldn't chown: %s", file);
1002 sbp->st_mode &= ~(S_ISUID|S_ISGID);
1003 }
1004
1005 /* we only allow set-id and the 9 normal permission bits */
1006 sbp->st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1007 if (chmod(file, sbp->st_mode) < 0)
1008 maybe_warn("couldn't chmod: %s", file);
1009
1010 /* only try flags if they exist already */
1011 if (sbp->st_flags != 0 && chflags(file, sbp->st_flags) < 0)
1012 maybe_warn("couldn't chflags: %s", file);
1013
1014 TIMESPEC_TO_TIMEVAL(&times[0], &sbp->st_atimespec);
1015 TIMESPEC_TO_TIMEVAL(&times[1], &sbp->st_mtimespec);
1016 if (utimes(file, times) < 0)
1017 maybe_warn("couldn't utimes: %s", file);
1018 }
1019 #endif
1020
1021 /* what sort of file is this? */
1022 static enum filetype
1023 file_gettype(u_char *buf)
1024 {
1025
1026 if (buf[0] == GZIP_MAGIC0 &&
1027 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1028 return FT_GZIP;
1029 else
1030 #ifndef NO_BZIP2_SUPPORT
1031 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1032 buf[3] >= '0' && buf[3] <= '9')
1033 return FT_BZIP2;
1034 else
1035 #endif
1036 #ifndef NO_COMPRESS_SUPPORT
1037 if (memcmp(buf, Z_MAGIC, 2) == 0)
1038 return FT_Z;
1039 else
1040 #endif
1041 return FT_UNKNOWN;
1042 }
1043
1044 #ifndef SMALL
1045 /* check the outfile is OK. */
1046 static int
1047 check_outfile(const char *outfile, struct stat *sb)
1048 {
1049 int ok = 1;
1050
1051 if (lflag == 0 && stat(outfile, sb) == 0) {
1052 if (fflag)
1053 unlink(outfile);
1054 else if (isatty(STDIN_FILENO)) {
1055 char ans[10] = { 'n', '\0' }; /* default */
1056
1057 fprintf(stderr, "%s already exists -- do you wish to "
1058 "overwrite (y or n)? " , outfile);
1059 (void)fgets(ans, sizeof(ans) - 1, stdin);
1060 if (ans[0] != 'y' && ans[0] != 'Y') {
1061 fprintf(stderr, "\tnot overwriting\n");
1062 ok = 0;
1063 } else
1064 unlink(outfile);
1065 } else {
1066 maybe_warnx("%s already exists -- skipping", outfile);
1067 ok = 0;
1068 }
1069 }
1070 return ok;
1071 }
1072
1073 static void
1074 unlink_input(const char *file, struct stat *sb)
1075 {
1076 struct stat nsb;
1077
1078 if (stat(file, &nsb) != 0)
1079 /* Must be gone alrady */
1080 return;
1081 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1082 /* Definitely a different file */
1083 return;
1084 unlink(file);
1085 }
1086 #endif
1087
1088 static const suffixes_t *
1089 check_suffix(char *file, int xlate)
1090 {
1091 const suffixes_t *s;
1092 int len = strlen(file);
1093 char *sp;
1094
1095 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1096 /* if it doesn't fit in "a.suf", don't bother */
1097 if (s->ziplen >= len)
1098 continue;
1099 sp = file + len - s->ziplen;
1100 if (strcmp(s->zipped, sp) != 0)
1101 continue;
1102 if (xlate)
1103 strcpy(sp, s->normal);
1104 return s;
1105 }
1106 return NULL;
1107 }
1108
1109 /*
1110 * compress the given file: create a corresponding .gz file and remove the
1111 * original.
1112 */
1113 static off_t
1114 file_compress(char *file, char *outfile, size_t outsize)
1115 {
1116 int in;
1117 int out;
1118 off_t size, insize;
1119 #ifndef SMALL
1120 struct stat isb, osb;
1121 const suffixes_t *suff;
1122 #endif
1123
1124 in = open(file, O_RDONLY);
1125 if (in == -1) {
1126 maybe_warn("can't open %s", file);
1127 return -1;
1128 }
1129
1130 if (cflag == 0) {
1131 #ifndef SMALL
1132 if (stat(file, &isb) == 0) {
1133 if (isb.st_nlink > 1 && fflag == 0) {
1134 maybe_warnx("%s has %d other link%s -- "
1135 "skipping", file, isb.st_nlink - 1,
1136 isb.st_nlink == 1 ? "" : "s");
1137 close(in);
1138 return -1;
1139 }
1140 }
1141
1142 if (fflag == 0 && (suff = check_suffix(file, 0))
1143 && suff->zipped[0] != 0) {
1144 maybe_warnx("%s already has %s suffix -- unchanged",
1145 file, suff->zipped);
1146 close(in);
1147 return -1;
1148 }
1149 #endif
1150
1151 /* Add (usually) .gz to filename */
1152 if ((size_t)snprintf(outfile, outsize, "%s%s",
1153 file, suffixes[0].zipped) >= outsize)
1154 memcpy(outfile - suffixes[0].ziplen - 1,
1155 suffixes[0].zipped, suffixes[0].ziplen + 1);
1156
1157 #ifndef SMALL
1158 if (check_outfile(outfile, &osb) == 0) {
1159 close(in);
1160 return -1;
1161 }
1162 #endif
1163 }
1164
1165 if (cflag == 0) {
1166 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1167 if (out == -1) {
1168 maybe_warn("could not create output: %s", outfile);
1169 fclose(stdin);
1170 return -1;
1171 }
1172 } else
1173 out = STDOUT_FILENO;
1174
1175 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1176
1177 (void)close(in);
1178
1179 /*
1180 * If there was an error, insize will be -1.
1181 * If we compressed to stdout, just return the size.
1182 * Otherwise stat the file and check it is the correct size.
1183 * We only blow away the file if we can stat the output and it
1184 * has the expected size.
1185 */
1186 if (cflag != 0)
1187 return insize == -1 ? -1 : size;
1188
1189 if (close(out) == -1)
1190 maybe_warn("couldn't close ouput");
1191
1192 #ifndef SMALL
1193 if (stat(outfile, &osb) < 0) {
1194 maybe_warn("couldn't stat: %s", outfile);
1195 goto bad_outfile;
1196 }
1197
1198 if (osb.st_size != size) {
1199 maybe_warnx("output file: %s wrong size (%" PRIdOFF
1200 " != %" PRIdOFF "), deleting",
1201 outfile, osb.st_size, size);
1202 goto bad_outfile;
1203 }
1204
1205 copymodes(outfile, &isb);
1206 #endif
1207
1208 /* output is good, ok to delete input */
1209 unlink_input(file, &isb);
1210 return size;
1211
1212 #ifndef SMALL
1213 bad_outfile:
1214 maybe_warnx("leaving original %s", file);
1215 unlink(outfile);
1216 return size;
1217 #endif
1218 }
1219
1220 /* uncompress the given file and remove the original */
1221 static off_t
1222 file_uncompress(char *file, char *outfile, size_t outsize)
1223 {
1224 struct stat isb, osb;
1225 off_t size;
1226 ssize_t rbytes;
1227 unsigned char header1[4];
1228 enum filetype method;
1229 int fd, zfd = -1;
1230 #ifndef SMALL
1231 time_t timestamp = 0;
1232 unsigned char name[PATH_MAX + 1];
1233 #endif
1234
1235 /* gather the old name info */
1236
1237 fd = open(file, O_RDONLY);
1238 if (fd < 0) {
1239 maybe_warn("can't open %s", file);
1240 goto lose;
1241 }
1242
1243 strlcpy(outfile, file, outsize);
1244 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1245 maybe_warnx("%s: unknown suffix -- ignored", file);
1246 goto lose;
1247 }
1248
1249 rbytes = read(fd, header1, sizeof header1);
1250 if (rbytes != sizeof header1) {
1251 /* we don't want to fail here. */
1252 #ifndef SMALL
1253 if (fflag)
1254 goto lose;
1255 #endif
1256 if (rbytes == -1)
1257 maybe_warn("can't read %s", file);
1258 else
1259 maybe_warnx("%s: unexpected end of file", file);
1260 goto lose;
1261 }
1262
1263 method = file_gettype(header1);
1264
1265 #ifndef SMALL
1266 if (fflag == 0 && method == FT_UNKNOWN) {
1267 maybe_warnx("%s: not in gzip format", file);
1268 goto lose;
1269 }
1270
1271 #endif
1272
1273 #ifndef SMALL
1274 if (method == FT_GZIP && Nflag) {
1275 unsigned char ts[4]; /* timestamp */
1276
1277 if (pread(fd, ts, sizeof ts, GZIP_TIMESTAMP) != sizeof ts) {
1278 if (!fflag)
1279 maybe_warn("can't read %s", file);
1280 goto lose;
1281 }
1282 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1283
1284 if (header1[3] & ORIG_NAME) {
1285 rbytes = pread(fd, name, sizeof name, GZIP_ORIGNAME);
1286 if (rbytes < 0) {
1287 maybe_warn("can't read %s", file);
1288 goto lose;
1289 }
1290 if (name[0] != 0) {
1291 /* preserve original directory name */
1292 char *dp = strrchr(file, '/');
1293 if (dp == NULL)
1294 dp = file;
1295 else
1296 dp++;
1297 snprintf(outfile, outsize, "%.*s%.*s",
1298 (int) (dp - file),
1299 file, (int) rbytes, name);
1300 }
1301 }
1302 }
1303 #endif
1304 lseek(fd, 0, SEEK_SET);
1305
1306 if (cflag == 0 || lflag) {
1307 if (fstat(fd, &isb) != 0)
1308 goto lose;
1309 #ifndef SMALL
1310 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1311 maybe_warnx("%s has %d other links -- skipping",
1312 file, isb.st_nlink - 1);
1313 goto lose;
1314 }
1315 if (nflag == 0 && timestamp)
1316 isb.st_mtime = timestamp;
1317 if (check_outfile(outfile, &osb) == 0)
1318 goto lose;
1319 #endif
1320 }
1321
1322 if (cflag == 0 && lflag == 0) {
1323 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1324 if (zfd == STDOUT_FILENO) {
1325 /* We won't close STDOUT_FILENO later... */
1326 zfd = dup(zfd);
1327 close(STDOUT_FILENO);
1328 }
1329 if (zfd == -1) {
1330 maybe_warn("can't open %s", outfile);
1331 goto lose;
1332 }
1333 } else
1334 zfd = STDOUT_FILENO;
1335
1336 #ifndef NO_BZIP2_SUPPORT
1337 if (method == FT_BZIP2) {
1338
1339 /* XXX */
1340 if (lflag) {
1341 maybe_warnx("no -l with bzip2 files");
1342 goto lose;
1343 }
1344
1345 size = unbzip2(fd, zfd, NULL, 0, NULL);
1346 } else
1347 #endif
1348
1349 #ifndef NO_COMPRESS_SUPPORT
1350 if (method == FT_Z) {
1351 FILE *in, *out;
1352
1353 /* XXX */
1354 if (lflag) {
1355 maybe_warnx("no -l with Lempel-Ziv files");
1356 goto lose;
1357 }
1358
1359 if ((in = zdopen(fd)) == NULL) {
1360 maybe_warn("zdopen for read: %s", file);
1361 goto lose;
1362 }
1363
1364 out = fdopen(dup(zfd), "w");
1365 if (out == NULL) {
1366 maybe_warn("fdopen for write: %s", outfile);
1367 fclose(in);
1368 goto lose;
1369 }
1370
1371 size = zuncompress(in, out, NULL, 0, NULL);
1372 /* need to fclose() if ferror() is true... */
1373 if (ferror(in) | fclose(in)) {
1374 maybe_warn("failed infile fclose");
1375 unlink(outfile);
1376 (void)fclose(out);
1377 }
1378 if (fclose(out) != 0) {
1379 maybe_warn("failed outfile fclose");
1380 unlink(outfile);
1381 goto lose;
1382 }
1383 } else
1384 #endif
1385
1386 #ifndef SMALL
1387 if (method == FT_UNKNOWN) {
1388 if (lflag) {
1389 maybe_warnx("no -l for unknown filetypes");
1390 goto lose;
1391 }
1392 size = cat_fd(NULL, 0, NULL, fd);
1393 } else
1394 #endif
1395 {
1396 if (lflag) {
1397 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1398 close(fd);
1399 return -1; /* XXX */
1400 }
1401
1402 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1403 }
1404
1405 if (close(fd) != 0)
1406 maybe_warn("couldn't close input");
1407 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1408 maybe_warn("couldn't close output");
1409
1410 if (size == -1) {
1411 if (cflag == 0)
1412 unlink(outfile);
1413 maybe_warnx("%s: uncompress failed", file);
1414 return -1;
1415 }
1416
1417 /* if testing, or we uncompressed to stdout, this is all we need */
1418 #ifndef SMALL
1419 if (tflag)
1420 return size;
1421 #endif
1422 /* if we are uncompressing to stdin, don't remove the file. */
1423 if (cflag)
1424 return size;
1425
1426 /*
1427 * if we create a file...
1428 */
1429 /*
1430 * if we can't stat the file don't remove the file.
1431 */
1432 if (stat(outfile, &osb) < 0) {
1433 maybe_warn("couldn't stat (leaving original): %s",
1434 outfile);
1435 return -1;
1436 }
1437 if (osb.st_size != size) {
1438 maybe_warn("stat gave different size: %" PRIdOFF
1439 " != %" PRIdOFF " (leaving original)",
1440 size, osb.st_size);
1441 unlink(outfile);
1442 return -1;
1443 }
1444 unlink_input(file, &isb);
1445 #ifndef SMALL
1446 copymodes(outfile, &isb);
1447 #endif
1448 return size;
1449
1450 lose:
1451 if (fd != -1)
1452 close(fd);
1453 if (zfd != -1 && zfd != STDOUT_FILENO)
1454 close(fd);
1455 return -1;
1456 }
1457
1458 #ifndef SMALL
1459 static off_t
1460 cat_fd(unsigned char * prepend, ssize_t count, off_t *gsizep, int fd)
1461 {
1462 char buf[BUFLEN];
1463 ssize_t rv;
1464 off_t in_tot;
1465
1466 in_tot = count;
1467 if (write(STDOUT_FILENO, prepend, count) != count) {
1468 maybe_warn("write to stdout");
1469 return -1;
1470 }
1471 for (;;) {
1472 rv = read(fd, buf, sizeof buf);
1473 if (rv == 0)
1474 break;
1475 if (rv < 0) {
1476 maybe_warn("read from fd %d", fd);
1477 break;
1478 }
1479
1480 if (write(STDOUT_FILENO, buf, rv) != rv) {
1481 maybe_warn("write to stdout");
1482 break;
1483 }
1484 in_tot += rv;
1485 }
1486
1487 if (gsizep)
1488 *gsizep = in_tot;
1489 return (in_tot);
1490 }
1491 #endif
1492
1493 static void
1494 handle_stdin(void)
1495 {
1496 unsigned char header1[4];
1497 off_t usize, gsize;
1498 enum filetype method;
1499 #ifndef NO_COMPRESS_SUPPORT
1500 FILE *in;
1501 #endif
1502
1503 #ifndef SMALL
1504 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1505 maybe_warnx("standard input is a terminal -- ignoring");
1506 return;
1507 }
1508 #endif
1509
1510 if (lflag) {
1511 struct stat isb;
1512
1513 /* XXX could read the whole file, etc. */
1514 if (fstat(STDIN_FILENO, &isb) < 0) {
1515 maybe_warn("fstat");
1516 return;
1517 }
1518 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1519 return;
1520 }
1521
1522 if (read(STDIN_FILENO, header1, sizeof header1) != sizeof header1) {
1523 maybe_warn("can't read stdin");
1524 return;
1525 }
1526
1527 method = file_gettype(header1);
1528 switch (method) {
1529 default:
1530 #ifndef SMALL
1531 if (fflag == 0) {
1532 maybe_warnx("unknown compression format");
1533 return;
1534 }
1535 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1536 break;
1537 #endif
1538 case FT_GZIP:
1539 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1540 header1, sizeof header1, &gsize, "(stdin)");
1541 break;
1542 #ifndef NO_BZIP2_SUPPORT
1543 case FT_BZIP2:
1544 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1545 header1, sizeof header1, &gsize);
1546 break;
1547 #endif
1548 #ifndef NO_COMPRESS_SUPPORT
1549 case FT_Z:
1550 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1551 maybe_warnx("zopen of stdin");
1552 return;
1553 }
1554
1555 usize = zuncompress(in, stdout, header1, sizeof header1, &gsize);
1556 fclose(in);
1557 break;
1558 #endif
1559 }
1560
1561 #ifndef SMALL
1562 if (vflag && !tflag && usize != -1 && gsize != -1)
1563 print_verbage(NULL, NULL, usize, gsize);
1564 #endif
1565
1566 }
1567
1568 static void
1569 handle_stdout(void)
1570 {
1571 off_t gsize, usize;
1572
1573 #ifndef SMALL
1574 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1575 maybe_warnx("standard output is a terminal -- ignoring");
1576 return;
1577 }
1578 #endif
1579 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", 0);
1580
1581 #ifndef SMALL
1582 if (vflag && !tflag && usize != -1 && gsize != -1)
1583 print_verbage(NULL, NULL, usize, gsize);
1584 #endif
1585 }
1586
1587 /* do what is asked for, for the path name */
1588 static void
1589 handle_pathname(char *path)
1590 {
1591 char *opath = path, *s = NULL;
1592 ssize_t len;
1593 int slen;
1594 struct stat sb;
1595
1596 /* check for stdout/stdin */
1597 if (path[0] == '-' && path[1] == '\0') {
1598 if (dflag)
1599 handle_stdin();
1600 else
1601 handle_stdout();
1602 return;
1603 }
1604
1605 retry:
1606 if (stat(path, &sb) < 0) {
1607 /* lets try <path>.gz if we're decompressing */
1608 if (dflag && s == NULL && errno == ENOENT) {
1609 len = strlen(path);
1610 slen = suffixes[0].ziplen;
1611 s = malloc(len + slen + 1);
1612 if (s == NULL)
1613 maybe_err("malloc");
1614 memcpy(s, path, len);
1615 memcpy(s + len, suffixes[0].zipped, slen + 1);
1616 path = s;
1617 goto retry;
1618 }
1619 maybe_warn("can't stat: %s", opath);
1620 goto out;
1621 }
1622
1623 if (S_ISDIR(sb.st_mode)) {
1624 #ifndef SMALL
1625 if (rflag)
1626 handle_dir(path);
1627 else
1628 #endif
1629 maybe_warnx("%s is a directory", path);
1630 goto out;
1631 }
1632
1633 if (S_ISREG(sb.st_mode))
1634 handle_file(path, &sb);
1635 else
1636 maybe_warnx("%s is not a regular file", path);
1637
1638 out:
1639 if (s)
1640 free(s);
1641 }
1642
1643 /* compress/decompress a file */
1644 static void
1645 handle_file(char *file, struct stat *sbp)
1646 {
1647 off_t usize, gsize;
1648 char outfile[PATH_MAX];
1649
1650 infile = file;
1651 if (dflag) {
1652 usize = file_uncompress(file, outfile, sizeof(outfile));
1653 if (usize == -1)
1654 return;
1655 gsize = sbp->st_size;
1656 } else {
1657 gsize = file_compress(file, outfile, sizeof(outfile));
1658 if (gsize == -1)
1659 return;
1660 usize = sbp->st_size;
1661 }
1662
1663
1664 #ifndef SMALL
1665 if (vflag && !tflag)
1666 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1667 #endif
1668 }
1669
1670 #ifndef SMALL
1671 /* this is used with -r to recursively descend directories */
1672 static void
1673 handle_dir(char *dir)
1674 {
1675 char *path_argv[2];
1676 FTS *fts;
1677 FTSENT *entry;
1678
1679 path_argv[0] = dir;
1680 path_argv[1] = 0;
1681 fts = fts_open(path_argv, FTS_PHYSICAL, NULL);
1682 if (fts == NULL) {
1683 warn("couldn't fts_open %s", dir);
1684 return;
1685 }
1686
1687 while ((entry = fts_read(fts))) {
1688 switch(entry->fts_info) {
1689 case FTS_D:
1690 case FTS_DP:
1691 continue;
1692
1693 case FTS_DNR:
1694 case FTS_ERR:
1695 case FTS_NS:
1696 maybe_warn("%s", entry->fts_path);
1697 continue;
1698 case FTS_F:
1699 handle_file(entry->fts_name, entry->fts_statp);
1700 }
1701 }
1702 (void)fts_close(fts);
1703 }
1704 #endif
1705
1706 /* print a ratio - size reduction as a fraction of uncompressed size */
1707 static void
1708 print_ratio(off_t in, off_t out, FILE *where)
1709 {
1710 int percent10; /* 10 * percent */
1711 off_t diff;
1712 char buff[8];
1713 int len;
1714
1715 diff = in - out/2;
1716 if (diff <= 0)
1717 /*
1718 * Output is more than double size of input! print -99.9%
1719 * Quite possibly we've failed to get the original size.
1720 */
1721 percent10 = -999;
1722 else {
1723 /*
1724 * We only need 12 bits of result from the final division,
1725 * so reduce the values until a 32bit division will suffice.
1726 */
1727 while (in > 0x100000) {
1728 diff >>= 1;
1729 in >>= 1;
1730 }
1731 if (in != 0)
1732 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1733 else
1734 percent10 = 0;
1735 }
1736
1737 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1738 /* Move the '.' to before the last digit */
1739 buff[len - 1] = buff[len - 2];
1740 buff[len - 2] = '.';
1741 fprintf(where, "%5s%%", buff);
1742 }
1743
1744 #ifndef SMALL
1745 /* print compression statistics, and the new name (if there is one!) */
1746 static void
1747 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1748 {
1749 if (file)
1750 fprintf(stderr, "%s:%s ", file,
1751 strlen(file) < 7 ? "\t\t" : "\t");
1752 print_ratio(usize, gsize, stderr);
1753 if (nfile)
1754 fprintf(stderr, " -- replaced with %s", nfile);
1755 fprintf(stderr, "\n");
1756 fflush(stderr);
1757 }
1758
1759 /* print test results */
1760 static void
1761 print_test(const char *file, int ok)
1762 {
1763
1764 if (exit_value == 0 && ok == 0)
1765 exit_value = 1;
1766 fprintf(stderr, "%s:%s %s\n", file,
1767 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
1768 fflush(stderr);
1769 }
1770 #endif
1771
1772 /* print a file's info ala --list */
1773 /* eg:
1774 compressed uncompressed ratio uncompressed_name
1775 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
1776 */
1777 static void
1778 print_list(int fd, off_t out, const char *outfile, time_t ts)
1779 {
1780 static int first = 1;
1781 #ifndef SMALL
1782 static off_t in_tot, out_tot;
1783 uint32_t crc = 0;
1784 #endif
1785 off_t in = 0;
1786 int rv;
1787
1788 if (first) {
1789 #ifndef SMALL
1790 if (vflag)
1791 printf("method crc date time ");
1792 #endif
1793 if (qflag == 0)
1794 printf(" compressed uncompressed "
1795 "ratio uncompressed_name\n");
1796 }
1797 first = 0;
1798
1799 /* print totals? */
1800 #ifndef SMALL
1801 if (fd == -1) {
1802 in = in_tot;
1803 out = out_tot;
1804 } else
1805 #endif
1806 {
1807 /* read the last 4 bytes - this is the uncompressed size */
1808 rv = lseek(fd, (off_t)(-8), SEEK_END);
1809 if (rv != -1) {
1810 unsigned char buf[8];
1811 uint32_t usize;
1812
1813 if (read(fd, (char *)buf, sizeof(buf)) != sizeof(buf))
1814 maybe_warn("read of uncompressed size");
1815 usize = buf[4] | buf[5] << 8 | buf[6] << 16 | buf[7] << 24;
1816 in = (off_t)usize;
1817 #ifndef SMALL
1818 crc = buf[0] | buf[1] << 8 | buf[2] << 16 | buf[3] << 24;
1819 #endif
1820 }
1821 }
1822
1823 #ifndef SMALL
1824 if (vflag && fd == -1)
1825 printf(" ");
1826 else if (vflag) {
1827 char *date = ctime(&ts);
1828
1829 /* skip the day, 1/100th second, and year */
1830 date += 4;
1831 date[12] = 0;
1832 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
1833 }
1834 in_tot += in;
1835 out_tot += out;
1836 #endif
1837 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
1838 print_ratio(in, out, stdout);
1839 printf(" %s\n", outfile);
1840 }
1841
1842 /* display the usage of NetBSD gzip */
1843 static void
1844 usage(void)
1845 {
1846
1847 fprintf(stderr, "%s\n", gzip_version);
1848 fprintf(stderr,
1849 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n"
1850 #ifndef SMALL
1851 " -c --stdout write to stdout, keep original files\n"
1852 " --to-stdout\n"
1853 " -d --decompress uncompress files\n"
1854 " --uncompress\n"
1855 " -f --force force overwriting & compress links\n"
1856 " -h --help display this help\n"
1857 " -n --no-name don't save original file name or time stamp\n"
1858 " -N --name save or restore original file name and time stamp\n"
1859 " -q --quiet output no warnings\n"
1860 " -r --recursive recursively compress files in directories\n"
1861 " -S .suf use suffix .suf instead of .gz\n"
1862 " --suffix .suf\n"
1863 " -t --test test compressed file\n"
1864 " -v --verbose print extra statistics\n"
1865 " -V --version display program version\n"
1866 " -1 --fast fastest (worst) compression\n"
1867 " -2 .. -8 set compression level\n"
1868 " -9 --best best (slowest) compression\n",
1869 #else
1870 ,
1871 #endif
1872 getprogname());
1873 exit(0);
1874 }
1875
1876 /* display the version of NetBSD gzip */
1877 static void
1878 display_version(void)
1879 {
1880
1881 fprintf(stderr, "%s\n", gzip_version);
1882 exit(0);
1883 }
1884
1885 #ifndef NO_BZIP2_SUPPORT
1886 #include "unbzip2.c"
1887 #endif
1888 #ifndef NO_COMPRESS_SUPPORT
1889 #include "zuncompress.c"
1890 #endif
DragonFly BSD