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mail(1): Invert calloc(3) argument order.
[freebsd-src.git] / usr.bin / gzip / gzip.c
blob8f22abcf4c61c60a3720884663337479c20060c6
1 /* $NetBSD: gzip.c,v 1.109 2015/10/27 07:36:18 mrg Exp $ */
2
3 /*-
4 * Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 *
28 */
29
30 #include <sys/cdefs.h>
31 #ifndef lint
32 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006\
33 Matthew R. Green. All rights reserved.");
34 __FBSDID("$FreeBSD$");
35 #endif /* not lint */
36
37 /*
38 * gzip.c -- GPL free gzip using zlib.
39 *
40 * RFC 1950 covers the zlib format
41 * RFC 1951 covers the deflate format
42 * RFC 1952 covers the gzip format
43 *
44 * TODO:
45 * - use mmap where possible
46 * - make bzip2/compress -v/-t/-l support work as well as possible
47 */
48
49 #include <sys/param.h>
50 #include <sys/stat.h>
51 #include <sys/time.h>
52
53 #include <inttypes.h>
54 #include <unistd.h>
55 #include <stdio.h>
56 #include <string.h>
57 #include <stdlib.h>
58 #include <err.h>
59 #include <errno.h>
60 #include <fcntl.h>
61 #include <zlib.h>
62 #include <fts.h>
63 #include <libgen.h>
64 #include <stdarg.h>
65 #include <getopt.h>
66 #include <time.h>
67
68 /* what type of file are we dealing with */
69 enum filetype {
70 FT_GZIP,
71 #ifndef NO_BZIP2_SUPPORT
72 FT_BZIP2,
73 #endif
74 #ifndef NO_COMPRESS_SUPPORT
75 FT_Z,
76 #endif
77 #ifndef NO_PACK_SUPPORT
78 FT_PACK,
79 #endif
80 #ifndef NO_XZ_SUPPORT
81 FT_XZ,
82 #endif
83 FT_LAST,
84 FT_UNKNOWN
85 };
86
87 #ifndef NO_BZIP2_SUPPORT
88 #include <bzlib.h>
89
90 #define BZ2_SUFFIX ".bz2"
91 #define BZIP2_MAGIC "\102\132\150"
92 #endif
93
94 #ifndef NO_COMPRESS_SUPPORT
95 #define Z_SUFFIX ".Z"
96 #define Z_MAGIC "\037\235"
97 #endif
98
99 #ifndef NO_PACK_SUPPORT
100 #define PACK_MAGIC "\037\036"
101 #endif
102
103 #ifndef NO_XZ_SUPPORT
104 #include <lzma.h>
105 #define XZ_SUFFIX ".xz"
106 #define XZ_MAGIC "\3757zXZ"
107 #endif
108
109 #define GZ_SUFFIX ".gz"
110
111 #define BUFLEN (64 * 1024)
112
113 #define GZIP_MAGIC0 0x1F
114 #define GZIP_MAGIC1 0x8B
115 #define GZIP_OMAGIC1 0x9E
116
117 #define GZIP_TIMESTAMP (off_t)4
118 #define GZIP_ORIGNAME (off_t)10
119
120 #define HEAD_CRC 0x02
121 #define EXTRA_FIELD 0x04
122 #define ORIG_NAME 0x08
123 #define COMMENT 0x10
124
125 #define OS_CODE 3 /* Unix */
126
127 typedef struct {
128 const char *zipped;
129 int ziplen;
130 const char *normal; /* for unzip - must not be longer than zipped */
131 } suffixes_t;
132 static suffixes_t suffixes[] = {
133 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
134 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
135 #ifndef SMALL
136 SUFFIX(GZ_SUFFIX, ""),
137 SUFFIX(".z", ""),
138 SUFFIX("-gz", ""),
139 SUFFIX("-z", ""),
140 SUFFIX("_z", ""),
141 SUFFIX(".taz", ".tar"),
142 SUFFIX(".tgz", ".tar"),
143 #ifndef NO_BZIP2_SUPPORT
144 SUFFIX(BZ2_SUFFIX, ""),
145 SUFFIX(".tbz", ".tar"),
146 SUFFIX(".tbz2", ".tar"),
147 #endif
148 #ifndef NO_COMPRESS_SUPPORT
149 SUFFIX(Z_SUFFIX, ""),
150 #endif
151 #ifndef NO_XZ_SUPPORT
152 SUFFIX(XZ_SUFFIX, ""),
153 #endif
154 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
155 #endif /* SMALL */
156 #undef SUFFIX
157 };
158 #define NUM_SUFFIXES (sizeof suffixes / sizeof suffixes[0])
159 #define SUFFIX_MAXLEN 30
160
161 static const char gzip_version[] = "FreeBSD gzip 20150413";
162
163 #ifndef SMALL
164 static const char gzip_copyright[] = \
165 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n"
166 " All rights reserved.\n"
167 "\n"
168 " Redistribution and use in source and binary forms, with or without\n"
169 " modification, are permitted provided that the following conditions\n"
170 " are met:\n"
171 " 1. Redistributions of source code must retain the above copyright\n"
172 " notice, this list of conditions and the following disclaimer.\n"
173 " 2. Redistributions in binary form must reproduce the above copyright\n"
174 " notice, this list of conditions and the following disclaimer in the\n"
175 " documentation and/or other materials provided with the distribution.\n"
176 "\n"
177 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
178 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n"
179 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n"
180 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n"
181 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n"
182 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
183 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n"
184 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n"
185 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n"
186 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n"
187 " SUCH DAMAGE.";
188 #endif
189
190 static int cflag; /* stdout mode */
191 static int dflag; /* decompress mode */
192 static int lflag; /* list mode */
193 static int numflag = 6; /* gzip -1..-9 value */
194
195 #ifndef SMALL
196 static int fflag; /* force mode */
197 static int kflag; /* don't delete input files */
198 static int nflag; /* don't save name/timestamp */
199 static int Nflag; /* don't restore name/timestamp */
200 static int qflag; /* quiet mode */
201 static int rflag; /* recursive mode */
202 static int tflag; /* test */
203 static int vflag; /* verbose mode */
204 static const char *remove_file = NULL; /* file to be removed upon SIGINT */
205 #else
206 #define qflag 0
207 #define tflag 0
208 #endif
209
210 static int exit_value = 0; /* exit value */
211
212 static char *infile; /* name of file coming in */
213
214 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2;
215 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
216 !defined(NO_XZ_SUPPORT)
217 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2;
218 #endif
219 static void maybe_warn(const char *fmt, ...) __printflike(1, 2);
220 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2);
221 static enum filetype file_gettype(u_char *);
222 #ifdef SMALL
223 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
224 #endif
225 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
226 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
227 static off_t file_compress(char *, char *, size_t);
228 static off_t file_uncompress(char *, char *, size_t);
229 static void handle_pathname(char *);
230 static void handle_file(char *, struct stat *);
231 static void handle_stdin(void);
232 static void handle_stdout(void);
233 static void print_ratio(off_t, off_t, FILE *);
234 static void print_list(int fd, off_t, const char *, time_t);
235 static void usage(void) __dead2;
236 static void display_version(void) __dead2;
237 #ifndef SMALL
238 static void display_license(void);
239 static void sigint_handler(int);
240 #endif
241 static const suffixes_t *check_suffix(char *, int);
242 static ssize_t read_retry(int, void *, size_t);
243
244 #ifdef SMALL
245 #define unlink_input(f, sb) unlink(f)
246 #else
247 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd);
248 static void prepend_gzip(char *, int *, char ***);
249 static void handle_dir(char *);
250 static void print_verbage(const char *, const char *, off_t, off_t);
251 static void print_test(const char *, int);
252 static void copymodes(int fd, const struct stat *, const char *file);
253 static int check_outfile(const char *outfile);
254 #endif
255
256 #ifndef NO_BZIP2_SUPPORT
257 static off_t unbzip2(int, int, char *, size_t, off_t *);
258 #endif
259
260 #ifndef NO_COMPRESS_SUPPORT
261 static FILE *zdopen(int);
262 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
263 #endif
264
265 #ifndef NO_PACK_SUPPORT
266 static off_t unpack(int, int, char *, size_t, off_t *);
267 #endif
268
269 #ifndef NO_XZ_SUPPORT
270 static off_t unxz(int, int, char *, size_t, off_t *);
271 #endif
272
273 #ifdef SMALL
274 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
275 #else
276 static const struct option longopts[] = {
277 { "stdout", no_argument, 0, 'c' },
278 { "to-stdout", no_argument, 0, 'c' },
279 { "decompress", no_argument, 0, 'd' },
280 { "uncompress", no_argument, 0, 'd' },
281 { "force", no_argument, 0, 'f' },
282 { "help", no_argument, 0, 'h' },
283 { "keep", no_argument, 0, 'k' },
284 { "list", no_argument, 0, 'l' },
285 { "no-name", no_argument, 0, 'n' },
286 { "name", no_argument, 0, 'N' },
287 { "quiet", no_argument, 0, 'q' },
288 { "recursive", no_argument, 0, 'r' },
289 { "suffix", required_argument, 0, 'S' },
290 { "test", no_argument, 0, 't' },
291 { "verbose", no_argument, 0, 'v' },
292 { "version", no_argument, 0, 'V' },
293 { "fast", no_argument, 0, '1' },
294 { "best", no_argument, 0, '9' },
295 { "ascii", no_argument, 0, 'a' },
296 { "license", no_argument, 0, 'L' },
297 { NULL, no_argument, 0, 0 },
298 };
299 #endif
300
301 int
302 main(int argc, char **argv)
303 {
304 const char *progname = getprogname();
305 #ifndef SMALL
306 char *gzip;
307 int len;
308 #endif
309 int ch;
310
311 #ifndef SMALL
312 if ((gzip = getenv("GZIP")) != NULL)
313 prepend_gzip(gzip, &argc, &argv);
314 signal(SIGINT, sigint_handler);
315 #endif
316
317 /*
318 * XXX
319 * handle being called `gunzip', `zcat' and `gzcat'
320 */
321 if (strcmp(progname, "gunzip") == 0)
322 dflag = 1;
323 else if (strcmp(progname, "zcat") == 0 ||
324 strcmp(progname, "gzcat") == 0)
325 dflag = cflag = 1;
326
327 #ifdef SMALL
328 #define OPT_LIST "123456789cdhlV"
329 #else
330 #define OPT_LIST "123456789acdfhklLNnqrS:tVv"
331 #endif
332
333 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
334 switch (ch) {
335 case '1': case '2': case '3':
336 case '4': case '5': case '6':
337 case '7': case '8': case '9':
338 numflag = ch - '0';
339 break;
340 case 'c':
341 cflag = 1;
342 break;
343 case 'd':
344 dflag = 1;
345 break;
346 case 'l':
347 lflag = 1;
348 dflag = 1;
349 break;
350 case 'V':
351 display_version();
352 /* NOTREACHED */
353 #ifndef SMALL
354 case 'a':
355 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname);
356 break;
357 case 'f':
358 fflag = 1;
359 break;
360 case 'k':
361 kflag = 1;
362 break;
363 case 'L':
364 display_license();
365 /* NOT REACHED */
366 case 'N':
367 nflag = 0;
368 Nflag = 1;
369 break;
370 case 'n':
371 nflag = 1;
372 Nflag = 0;
373 break;
374 case 'q':
375 qflag = 1;
376 break;
377 case 'r':
378 rflag = 1;
379 break;
380 case 'S':
381 len = strlen(optarg);
382 if (len != 0) {
383 if (len > SUFFIX_MAXLEN)
384 errx(1, "incorrect suffix: '%s': too long", optarg);
385 suffixes[0].zipped = optarg;
386 suffixes[0].ziplen = len;
387 } else {
388 suffixes[NUM_SUFFIXES - 1].zipped = "";
389 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
390 }
391 break;
392 case 't':
393 cflag = 1;
394 tflag = 1;
395 dflag = 1;
396 break;
397 case 'v':
398 vflag = 1;
399 break;
400 #endif
401 default:
402 usage();
403 /* NOTREACHED */
404 }
405 }
406 argv += optind;
407 argc -= optind;
408
409 if (argc == 0) {
410 if (dflag) /* stdin mode */
411 handle_stdin();
412 else /* stdout mode */
413 handle_stdout();
414 } else {
415 do {
416 handle_pathname(argv[0]);
417 } while (*++argv);
418 }
419 #ifndef SMALL
420 if (qflag == 0 && lflag && argc > 1)
421 print_list(-1, 0, "(totals)", 0);
422 #endif
423 exit(exit_value);
424 }
425
426 /* maybe print a warning */
427 void
428 maybe_warn(const char *fmt, ...)
429 {
430 va_list ap;
431
432 if (qflag == 0) {
433 va_start(ap, fmt);
434 vwarn(fmt, ap);
435 va_end(ap);
436 }
437 if (exit_value == 0)
438 exit_value = 1;
439 }
440
441 /* ... without an errno. */
442 void
443 maybe_warnx(const char *fmt, ...)
444 {
445 va_list ap;
446
447 if (qflag == 0) {
448 va_start(ap, fmt);
449 vwarnx(fmt, ap);
450 va_end(ap);
451 }
452 if (exit_value == 0)
453 exit_value = 1;
454 }
455
456 /* maybe print an error */
457 void
458 maybe_err(const char *fmt, ...)
459 {
460 va_list ap;
461
462 if (qflag == 0) {
463 va_start(ap, fmt);
464 vwarn(fmt, ap);
465 va_end(ap);
466 }
467 exit(2);
468 }
469
470 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
471 !defined(NO_XZ_SUPPORT)
472 /* ... without an errno. */
473 void
474 maybe_errx(const char *fmt, ...)
475 {
476 va_list ap;
477
478 if (qflag == 0) {
479 va_start(ap, fmt);
480 vwarnx(fmt, ap);
481 va_end(ap);
482 }
483 exit(2);
484 }
485 #endif
486
487 #ifndef SMALL
488 /* split up $GZIP and prepend it to the argument list */
489 static void
490 prepend_gzip(char *gzip, int *argc, char ***argv)
491 {
492 char *s, **nargv, **ac;
493 int nenvarg = 0, i;
494
495 /* scan how many arguments there are */
496 for (s = gzip;;) {
497 while (*s == ' ' || *s == '\t')
498 s++;
499 if (*s == 0)
500 goto count_done;
501 nenvarg++;
502 while (*s != ' ' && *s != '\t')
503 if (*s++ == 0)
504 goto count_done;
505 }
506 count_done:
507 /* punt early */
508 if (nenvarg == 0)
509 return;
510
511 *argc += nenvarg;
512 ac = *argv;
513
514 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
515 if (nargv == NULL)
516 maybe_err("malloc");
517
518 /* stash this away */
519 *argv = nargv;
520
521 /* copy the program name first */
522 i = 0;
523 nargv[i++] = *(ac++);
524
525 /* take a copy of $GZIP and add it to the array */
526 s = strdup(gzip);
527 if (s == NULL)
528 maybe_err("strdup");
529 for (;;) {
530 /* Skip whitespaces. */
531 while (*s == ' ' || *s == '\t')
532 s++;
533 if (*s == 0)
534 goto copy_done;
535 nargv[i++] = s;
536 /* Find the end of this argument. */
537 while (*s != ' ' && *s != '\t')
538 if (*s++ == 0)
539 /* Argument followed by NUL. */
540 goto copy_done;
541 /* Terminate by overwriting ' ' or '\t' with NUL. */
542 *s++ = 0;
543 }
544 copy_done:
545
546 /* copy the original arguments and a NULL */
547 while (*ac)
548 nargv[i++] = *(ac++);
549 nargv[i] = NULL;
550 }
551 #endif
552
553 /* compress input to output. Return bytes read, -1 on error */
554 static off_t
555 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
556 {
557 z_stream z;
558 char *outbufp, *inbufp;
559 off_t in_tot = 0, out_tot = 0;
560 ssize_t in_size;
561 int i, error;
562 uLong crc;
563 #ifdef SMALL
564 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
565 0, 0, 0, 0,
566 0, OS_CODE };
567 #endif
568
569 outbufp = malloc(BUFLEN);
570 inbufp = malloc(BUFLEN);
571 if (outbufp == NULL || inbufp == NULL) {
572 maybe_err("malloc failed");
573 goto out;
574 }
575
576 memset(&z, 0, sizeof z);
577 z.zalloc = Z_NULL;
578 z.zfree = Z_NULL;
579 z.opaque = 0;
580
581 #ifdef SMALL
582 memcpy(outbufp, header, sizeof header);
583 i = sizeof header;
584 #else
585 if (nflag != 0) {
586 mtime = 0;
587 origname = "";
588 }
589
590 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
591 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
592 *origname ? ORIG_NAME : 0,
593 mtime & 0xff,
594 (mtime >> 8) & 0xff,
595 (mtime >> 16) & 0xff,
596 (mtime >> 24) & 0xff,
597 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
598 OS_CODE, origname);
599 if (i >= BUFLEN)
600 /* this need PATH_MAX > BUFLEN ... */
601 maybe_err("snprintf");
602 if (*origname)
603 i++;
604 #endif
605
606 z.next_out = (unsigned char *)outbufp + i;
607 z.avail_out = BUFLEN - i;
608
609 error = deflateInit2(&z, numflag, Z_DEFLATED,
610 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
611 if (error != Z_OK) {
612 maybe_warnx("deflateInit2 failed");
613 in_tot = -1;
614 goto out;
615 }
616
617 crc = crc32(0L, Z_NULL, 0);
618 for (;;) {
619 if (z.avail_out == 0) {
620 if (write(out, outbufp, BUFLEN) != BUFLEN) {
621 maybe_warn("write");
622 out_tot = -1;
623 goto out;
624 }
625
626 out_tot += BUFLEN;
627 z.next_out = (unsigned char *)outbufp;
628 z.avail_out = BUFLEN;
629 }
630
631 if (z.avail_in == 0) {
632 in_size = read(in, inbufp, BUFLEN);
633 if (in_size < 0) {
634 maybe_warn("read");
635 in_tot = -1;
636 goto out;
637 }
638 if (in_size == 0)
639 break;
640
641 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
642 in_tot += in_size;
643 z.next_in = (unsigned char *)inbufp;
644 z.avail_in = in_size;
645 }
646
647 error = deflate(&z, Z_NO_FLUSH);
648 if (error != Z_OK && error != Z_STREAM_END) {
649 maybe_warnx("deflate failed");
650 in_tot = -1;
651 goto out;
652 }
653 }
654
655 /* clean up */
656 for (;;) {
657 size_t len;
658 ssize_t w;
659
660 error = deflate(&z, Z_FINISH);
661 if (error != Z_OK && error != Z_STREAM_END) {
662 maybe_warnx("deflate failed");
663 in_tot = -1;
664 goto out;
665 }
666
667 len = (char *)z.next_out - outbufp;
668
669 w = write(out, outbufp, len);
670 if (w == -1 || (size_t)w != len) {
671 maybe_warn("write");
672 out_tot = -1;
673 goto out;
674 }
675 out_tot += len;
676 z.next_out = (unsigned char *)outbufp;
677 z.avail_out = BUFLEN;
678
679 if (error == Z_STREAM_END)
680 break;
681 }
682
683 if (deflateEnd(&z) != Z_OK) {
684 maybe_warnx("deflateEnd failed");
685 in_tot = -1;
686 goto out;
687 }
688
689 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
690 (int)crc & 0xff,
691 (int)(crc >> 8) & 0xff,
692 (int)(crc >> 16) & 0xff,
693 (int)(crc >> 24) & 0xff,
694 (int)in_tot & 0xff,
695 (int)(in_tot >> 8) & 0xff,
696 (int)(in_tot >> 16) & 0xff,
697 (int)(in_tot >> 24) & 0xff);
698 if (i != 8)
699 maybe_err("snprintf");
700 if (write(out, outbufp, i) != i) {
701 maybe_warn("write");
702 in_tot = -1;
703 } else
704 out_tot += i;
705
706 out:
707 if (inbufp != NULL)
708 free(inbufp);
709 if (outbufp != NULL)
710 free(outbufp);
711 if (gsizep)
712 *gsizep = out_tot;
713 return in_tot;
714 }
715
716 /*
717 * uncompress input to output then close the input. return the
718 * uncompressed size written, and put the compressed sized read
719 * into `*gsizep'.
720 */
721 static off_t
722 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
723 const char *filename)
724 {
725 z_stream z;
726 char *outbufp, *inbufp;
727 off_t out_tot = -1, in_tot = 0;
728 uint32_t out_sub_tot = 0;
729 enum {
730 GZSTATE_MAGIC0,
731 GZSTATE_MAGIC1,
732 GZSTATE_METHOD,
733 GZSTATE_FLAGS,
734 GZSTATE_SKIPPING,
735 GZSTATE_EXTRA,
736 GZSTATE_EXTRA2,
737 GZSTATE_EXTRA3,
738 GZSTATE_ORIGNAME,
739 GZSTATE_COMMENT,
740 GZSTATE_HEAD_CRC1,
741 GZSTATE_HEAD_CRC2,
742 GZSTATE_INIT,
743 GZSTATE_READ,
744 GZSTATE_CRC,
745 GZSTATE_LEN,
746 } state = GZSTATE_MAGIC0;
747 int flags = 0, skip_count = 0;
748 int error = Z_STREAM_ERROR, done_reading = 0;
749 uLong crc = 0;
750 ssize_t wr;
751 int needmore = 0;
752
753 #define ADVANCE() { z.next_in++; z.avail_in--; }
754
755 if ((outbufp = malloc(BUFLEN)) == NULL) {
756 maybe_err("malloc failed");
757 goto out2;
758 }
759 if ((inbufp = malloc(BUFLEN)) == NULL) {
760 maybe_err("malloc failed");
761 goto out1;
762 }
763
764 memset(&z, 0, sizeof z);
765 z.avail_in = prelen;
766 z.next_in = (unsigned char *)pre;
767 z.avail_out = BUFLEN;
768 z.next_out = (unsigned char *)outbufp;
769 z.zalloc = NULL;
770 z.zfree = NULL;
771 z.opaque = 0;
772
773 in_tot = prelen;
774 out_tot = 0;
775
776 for (;;) {
777 if ((z.avail_in == 0 || needmore) && done_reading == 0) {
778 ssize_t in_size;
779
780 if (z.avail_in > 0) {
781 memmove(inbufp, z.next_in, z.avail_in);
782 }
783 z.next_in = (unsigned char *)inbufp;
784 in_size = read(in, z.next_in + z.avail_in,
785 BUFLEN - z.avail_in);
786
787 if (in_size == -1) {
788 maybe_warn("failed to read stdin");
789 goto stop_and_fail;
790 } else if (in_size == 0) {
791 done_reading = 1;
792 }
793
794 z.avail_in += in_size;
795 needmore = 0;
796
797 in_tot += in_size;
798 }
799 if (z.avail_in == 0) {
800 if (done_reading && state != GZSTATE_MAGIC0) {
801 maybe_warnx("%s: unexpected end of file",
802 filename);
803 goto stop_and_fail;
804 }
805 goto stop;
806 }
807 switch (state) {
808 case GZSTATE_MAGIC0:
809 if (*z.next_in != GZIP_MAGIC0) {
810 if (in_tot > 0) {
811 maybe_warnx("%s: trailing garbage "
812 "ignored", filename);
813 exit_value = 2;
814 goto stop;
815 }
816 maybe_warnx("input not gziped (MAGIC0)");
817 goto stop_and_fail;
818 }
819 ADVANCE();
820 state++;
821 out_sub_tot = 0;
822 crc = crc32(0L, Z_NULL, 0);
823 break;
824
825 case GZSTATE_MAGIC1:
826 if (*z.next_in != GZIP_MAGIC1 &&
827 *z.next_in != GZIP_OMAGIC1) {
828 maybe_warnx("input not gziped (MAGIC1)");
829 goto stop_and_fail;
830 }
831 ADVANCE();
832 state++;
833 break;
834
835 case GZSTATE_METHOD:
836 if (*z.next_in != Z_DEFLATED) {
837 maybe_warnx("unknown compression method");
838 goto stop_and_fail;
839 }
840 ADVANCE();
841 state++;
842 break;
843
844 case GZSTATE_FLAGS:
845 flags = *z.next_in;
846 ADVANCE();
847 skip_count = 6;
848 state++;
849 break;
850
851 case GZSTATE_SKIPPING:
852 if (skip_count > 0) {
853 skip_count--;
854 ADVANCE();
855 } else
856 state++;
857 break;
858
859 case GZSTATE_EXTRA:
860 if ((flags & EXTRA_FIELD) == 0) {
861 state = GZSTATE_ORIGNAME;
862 break;
863 }
864 skip_count = *z.next_in;
865 ADVANCE();
866 state++;
867 break;
868
869 case GZSTATE_EXTRA2:
870 skip_count |= ((*z.next_in) << 8);
871 ADVANCE();
872 state++;
873 break;
874
875 case GZSTATE_EXTRA3:
876 if (skip_count > 0) {
877 skip_count--;
878 ADVANCE();
879 } else
880 state++;
881 break;
882
883 case GZSTATE_ORIGNAME:
884 if ((flags & ORIG_NAME) == 0) {
885 state++;
886 break;
887 }
888 if (*z.next_in == 0)
889 state++;
890 ADVANCE();
891 break;
892
893 case GZSTATE_COMMENT:
894 if ((flags & COMMENT) == 0) {
895 state++;
896 break;
897 }
898 if (*z.next_in == 0)
899 state++;
900 ADVANCE();
901 break;
902
903 case GZSTATE_HEAD_CRC1:
904 if (flags & HEAD_CRC)
905 skip_count = 2;
906 else
907 skip_count = 0;
908 state++;
909 break;
910
911 case GZSTATE_HEAD_CRC2:
912 if (skip_count > 0) {
913 skip_count--;
914 ADVANCE();
915 } else
916 state++;
917 break;
918
919 case GZSTATE_INIT:
920 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
921 maybe_warnx("failed to inflateInit");
922 goto stop_and_fail;
923 }
924 state++;
925 break;
926
927 case GZSTATE_READ:
928 error = inflate(&z, Z_FINISH);
929 switch (error) {
930 /* Z_BUF_ERROR goes with Z_FINISH... */
931 case Z_BUF_ERROR:
932 if (z.avail_out > 0 && !done_reading)
933 continue;
934
935 case Z_STREAM_END:
936 case Z_OK:
937 break;
938
939 case Z_NEED_DICT:
940 maybe_warnx("Z_NEED_DICT error");
941 goto stop_and_fail;
942 case Z_DATA_ERROR:
943 maybe_warnx("data stream error");
944 goto stop_and_fail;
945 case Z_STREAM_ERROR:
946 maybe_warnx("internal stream error");
947 goto stop_and_fail;
948 case Z_MEM_ERROR:
949 maybe_warnx("memory allocation error");
950 goto stop_and_fail;
951
952 default:
953 maybe_warn("unknown error from inflate(): %d",
954 error);
955 }
956 wr = BUFLEN - z.avail_out;
957
958 if (wr != 0) {
959 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
960 if (
961 #ifndef SMALL
962 /* don't write anything with -t */
963 tflag == 0 &&
964 #endif
965 write(out, outbufp, wr) != wr) {
966 maybe_warn("error writing to output");
967 goto stop_and_fail;
968 }
969
970 out_tot += wr;
971 out_sub_tot += wr;
972 }
973
974 if (error == Z_STREAM_END) {
975 inflateEnd(&z);
976 state++;
977 }
978
979 z.next_out = (unsigned char *)outbufp;
980 z.avail_out = BUFLEN;
981
982 break;
983 case GZSTATE_CRC:
984 {
985 uLong origcrc;
986
987 if (z.avail_in < 4) {
988 if (!done_reading) {
989 needmore = 1;
990 continue;
991 }
992 maybe_warnx("truncated input");
993 goto stop_and_fail;
994 }
995 origcrc = ((unsigned)z.next_in[0] & 0xff) |
996 ((unsigned)z.next_in[1] & 0xff) << 8 |
997 ((unsigned)z.next_in[2] & 0xff) << 16 |
998 ((unsigned)z.next_in[3] & 0xff) << 24;
999 if (origcrc != crc) {
1000 maybe_warnx("invalid compressed"
1001 " data--crc error");
1002 goto stop_and_fail;
1003 }
1004 }
1005
1006 z.avail_in -= 4;
1007 z.next_in += 4;
1008
1009 if (!z.avail_in && done_reading) {
1010 goto stop;
1011 }
1012 state++;
1013 break;
1014 case GZSTATE_LEN:
1015 {
1016 uLong origlen;
1017
1018 if (z.avail_in < 4) {
1019 if (!done_reading) {
1020 needmore = 1;
1021 continue;
1022 }
1023 maybe_warnx("truncated input");
1024 goto stop_and_fail;
1025 }
1026 origlen = ((unsigned)z.next_in[0] & 0xff) |
1027 ((unsigned)z.next_in[1] & 0xff) << 8 |
1028 ((unsigned)z.next_in[2] & 0xff) << 16 |
1029 ((unsigned)z.next_in[3] & 0xff) << 24;
1030
1031 if (origlen != out_sub_tot) {
1032 maybe_warnx("invalid compressed"
1033 " data--length error");
1034 goto stop_and_fail;
1035 }
1036 }
1037
1038 z.avail_in -= 4;
1039 z.next_in += 4;
1040
1041 if (error < 0) {
1042 maybe_warnx("decompression error");
1043 goto stop_and_fail;
1044 }
1045 state = GZSTATE_MAGIC0;
1046 break;
1047 }
1048 continue;
1049 stop_and_fail:
1050 out_tot = -1;
1051 stop:
1052 break;
1053 }
1054 if (state > GZSTATE_INIT)
1055 inflateEnd(&z);
1056
1057 free(inbufp);
1058 out1:
1059 free(outbufp);
1060 out2:
1061 if (gsizep)
1062 *gsizep = in_tot;
1063 return (out_tot);
1064 }
1065
1066 #ifndef SMALL
1067 /*
1068 * set the owner, mode, flags & utimes using the given file descriptor.
1069 * file is only used in possible warning messages.
1070 */
1071 static void
1072 copymodes(int fd, const struct stat *sbp, const char *file)
1073 {
1074 struct timespec times[2];
1075 struct stat sb;
1076
1077 /*
1078 * If we have no info on the input, give this file some
1079 * default values and return..
1080 */
1081 if (sbp == NULL) {
1082 mode_t mask = umask(022);
1083
1084 (void)fchmod(fd, DEFFILEMODE & ~mask);
1085 (void)umask(mask);
1086 return;
1087 }
1088 sb = *sbp;
1089
1090 /* if the chown fails, remove set-id bits as-per compress(1) */
1091 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) {
1092 if (errno != EPERM)
1093 maybe_warn("couldn't fchown: %s", file);
1094 sb.st_mode &= ~(S_ISUID|S_ISGID);
1095 }
1096
1097 /* we only allow set-id and the 9 normal permission bits */
1098 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1099 if (fchmod(fd, sb.st_mode) < 0)
1100 maybe_warn("couldn't fchmod: %s", file);
1101
1102 times[0] = sb.st_atim;
1103 times[1] = sb.st_mtim;
1104 if (futimens(fd, times) < 0)
1105 maybe_warn("couldn't futimens: %s", file);
1106
1107 /* only try flags if they exist already */
1108 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0)
1109 maybe_warn("couldn't fchflags: %s", file);
1110 }
1111 #endif
1112
1113 /* what sort of file is this? */
1114 static enum filetype
1115 file_gettype(u_char *buf)
1116 {
1117
1118 if (buf[0] == GZIP_MAGIC0 &&
1119 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1120 return FT_GZIP;
1121 else
1122 #ifndef NO_BZIP2_SUPPORT
1123 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1124 buf[3] >= '0' && buf[3] <= '9')
1125 return FT_BZIP2;
1126 else
1127 #endif
1128 #ifndef NO_COMPRESS_SUPPORT
1129 if (memcmp(buf, Z_MAGIC, 2) == 0)
1130 return FT_Z;
1131 else
1132 #endif
1133 #ifndef NO_PACK_SUPPORT
1134 if (memcmp(buf, PACK_MAGIC, 2) == 0)
1135 return FT_PACK;
1136 else
1137 #endif
1138 #ifndef NO_XZ_SUPPORT
1139 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */
1140 return FT_XZ;
1141 else
1142 #endif
1143 return FT_UNKNOWN;
1144 }
1145
1146 #ifndef SMALL
1147 /* check the outfile is OK. */
1148 static int
1149 check_outfile(const char *outfile)
1150 {
1151 struct stat sb;
1152 int ok = 1;
1153
1154 if (lflag == 0 && stat(outfile, &sb) == 0) {
1155 if (fflag)
1156 unlink(outfile);
1157 else if (isatty(STDIN_FILENO)) {
1158 char ans[10] = { 'n', '\0' }; /* default */
1159
1160 fprintf(stderr, "%s already exists -- do you wish to "
1161 "overwrite (y or n)? " , outfile);
1162 (void)fgets(ans, sizeof(ans) - 1, stdin);
1163 if (ans[0] != 'y' && ans[0] != 'Y') {
1164 fprintf(stderr, "\tnot overwriting\n");
1165 ok = 0;
1166 } else
1167 unlink(outfile);
1168 } else {
1169 maybe_warnx("%s already exists -- skipping", outfile);
1170 ok = 0;
1171 }
1172 }
1173 return ok;
1174 }
1175
1176 static void
1177 unlink_input(const char *file, const struct stat *sb)
1178 {
1179 struct stat nsb;
1180
1181 if (kflag)
1182 return;
1183 if (stat(file, &nsb) != 0)
1184 /* Must be gone already */
1185 return;
1186 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1187 /* Definitely a different file */
1188 return;
1189 unlink(file);
1190 }
1191
1192 static void
1193 sigint_handler(int signo __unused)
1194 {
1195
1196 if (remove_file != NULL)
1197 unlink(remove_file);
1198 _exit(2);
1199 }
1200 #endif
1201
1202 static const suffixes_t *
1203 check_suffix(char *file, int xlate)
1204 {
1205 const suffixes_t *s;
1206 int len = strlen(file);
1207 char *sp;
1208
1209 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1210 /* if it doesn't fit in "a.suf", don't bother */
1211 if (s->ziplen >= len)
1212 continue;
1213 sp = file + len - s->ziplen;
1214 if (strcmp(s->zipped, sp) != 0)
1215 continue;
1216 if (xlate)
1217 strcpy(sp, s->normal);
1218 return s;
1219 }
1220 return NULL;
1221 }
1222
1223 /*
1224 * compress the given file: create a corresponding .gz file and remove the
1225 * original.
1226 */
1227 static off_t
1228 file_compress(char *file, char *outfile, size_t outsize)
1229 {
1230 int in;
1231 int out;
1232 off_t size, insize;
1233 #ifndef SMALL
1234 struct stat isb, osb;
1235 const suffixes_t *suff;
1236 #endif
1237
1238 in = open(file, O_RDONLY);
1239 if (in == -1) {
1240 maybe_warn("can't open %s", file);
1241 return (-1);
1242 }
1243
1244 #ifndef SMALL
1245 if (fstat(in, &isb) != 0) {
1246 maybe_warn("couldn't stat: %s", file);
1247 close(in);
1248 return (-1);
1249 }
1250 #endif
1251
1252 if (cflag == 0) {
1253 #ifndef SMALL
1254 if (isb.st_nlink > 1 && fflag == 0) {
1255 maybe_warnx("%s has %d other link%s -- skipping",
1256 file, isb.st_nlink - 1,
1257 (isb.st_nlink - 1) == 1 ? "" : "s");
1258 close(in);
1259 return (-1);
1260 }
1261
1262 if (fflag == 0 && (suff = check_suffix(file, 0)) &&
1263 suff->zipped[0] != 0) {
1264 maybe_warnx("%s already has %s suffix -- unchanged",
1265 file, suff->zipped);
1266 close(in);
1267 return (-1);
1268 }
1269 #endif
1270
1271 /* Add (usually) .gz to filename */
1272 if ((size_t)snprintf(outfile, outsize, "%s%s",
1273 file, suffixes[0].zipped) >= outsize)
1274 memcpy(outfile + outsize - suffixes[0].ziplen - 1,
1275 suffixes[0].zipped, suffixes[0].ziplen + 1);
1276
1277 #ifndef SMALL
1278 if (check_outfile(outfile) == 0) {
1279 close(in);
1280 return (-1);
1281 }
1282 #endif
1283 }
1284
1285 if (cflag == 0) {
1286 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1287 if (out == -1) {
1288 maybe_warn("could not create output: %s", outfile);
1289 fclose(stdin);
1290 return (-1);
1291 }
1292 #ifndef SMALL
1293 remove_file = outfile;
1294 #endif
1295 } else
1296 out = STDOUT_FILENO;
1297
1298 insize = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1299
1300 (void)close(in);
1301
1302 /*
1303 * If there was an error, insize will be -1.
1304 * If we compressed to stdout, just return the size.
1305 * Otherwise stat the file and check it is the correct size.
1306 * We only blow away the file if we can stat the output and it
1307 * has the expected size.
1308 */
1309 if (cflag != 0)
1310 return (insize == -1 ? -1 : size);
1311
1312 #ifndef SMALL
1313 if (fstat(out, &osb) != 0) {
1314 maybe_warn("couldn't stat: %s", outfile);
1315 goto bad_outfile;
1316 }
1317
1318 if (osb.st_size != size) {
1319 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting",
1320 outfile, (uintmax_t)osb.st_size, (uintmax_t)size);
1321 goto bad_outfile;
1322 }
1323
1324 copymodes(out, &isb, outfile);
1325 remove_file = NULL;
1326 #endif
1327 if (close(out) == -1)
1328 maybe_warn("couldn't close output");
1329
1330 /* output is good, ok to delete input */
1331 unlink_input(file, &isb);
1332 return (size);
1333
1334 #ifndef SMALL
1335 bad_outfile:
1336 if (close(out) == -1)
1337 maybe_warn("couldn't close output");
1338
1339 maybe_warnx("leaving original %s", file);
1340 unlink(outfile);
1341 return (size);
1342 #endif
1343 }
1344
1345 /* uncompress the given file and remove the original */
1346 static off_t
1347 file_uncompress(char *file, char *outfile, size_t outsize)
1348 {
1349 struct stat isb, osb;
1350 off_t size;
1351 ssize_t rbytes;
1352 unsigned char header1[4];
1353 enum filetype method;
1354 int fd, ofd, zfd = -1;
1355 #ifndef SMALL
1356 ssize_t rv;
1357 time_t timestamp = 0;
1358 char name[PATH_MAX + 1];
1359 #endif
1360
1361 /* gather the old name info */
1362
1363 fd = open(file, O_RDONLY);
1364 if (fd < 0) {
1365 maybe_warn("can't open %s", file);
1366 goto lose;
1367 }
1368
1369 strlcpy(outfile, file, outsize);
1370 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1371 maybe_warnx("%s: unknown suffix -- ignored", file);
1372 goto lose;
1373 }
1374
1375 rbytes = read(fd, header1, sizeof header1);
1376 if (rbytes != sizeof header1) {
1377 /* we don't want to fail here. */
1378 #ifndef SMALL
1379 if (fflag)
1380 goto lose;
1381 #endif
1382 if (rbytes == -1)
1383 maybe_warn("can't read %s", file);
1384 else
1385 goto unexpected_EOF;
1386 goto lose;
1387 }
1388
1389 method = file_gettype(header1);
1390 #ifndef SMALL
1391 if (fflag == 0 && method == FT_UNKNOWN) {
1392 maybe_warnx("%s: not in gzip format", file);
1393 goto lose;
1394 }
1395
1396 #endif
1397
1398 #ifndef SMALL
1399 if (method == FT_GZIP && Nflag) {
1400 unsigned char ts[4]; /* timestamp */
1401
1402 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
1403 if (rv >= 0 && rv < (ssize_t)(sizeof ts))
1404 goto unexpected_EOF;
1405 if (rv == -1) {
1406 if (!fflag)
1407 maybe_warn("can't read %s", file);
1408 goto lose;
1409 }
1410 timestamp = ts[3] << 24 | ts[2] << 16 | ts[1] << 8 | ts[0];
1411
1412 if (header1[3] & ORIG_NAME) {
1413 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
1414 if (rbytes < 0) {
1415 maybe_warn("can't read %s", file);
1416 goto lose;
1417 }
1418 if (name[0] != '\0') {
1419 char *dp, *nf;
1420
1421 /* Make sure that name is NUL-terminated */
1422 name[rbytes] = '\0';
1423
1424 /* strip saved directory name */
1425 nf = strrchr(name, '/');
1426 if (nf == NULL)
1427 nf = name;
1428 else
1429 nf++;
1430
1431 /* preserve original directory name */
1432 dp = strrchr(file, '/');
1433 if (dp == NULL)
1434 dp = file;
1435 else
1436 dp++;
1437 snprintf(outfile, outsize, "%.*s%.*s",
1438 (int) (dp - file),
1439 file, (int) rbytes, nf);
1440 }
1441 }
1442 }
1443 #endif
1444 lseek(fd, 0, SEEK_SET);
1445
1446 if (cflag == 0 || lflag) {
1447 if (fstat(fd, &isb) != 0)
1448 goto lose;
1449 #ifndef SMALL
1450 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1451 maybe_warnx("%s has %d other links -- skipping",
1452 file, isb.st_nlink - 1);
1453 goto lose;
1454 }
1455 if (nflag == 0 && timestamp)
1456 isb.st_mtime = timestamp;
1457 if (check_outfile(outfile) == 0)
1458 goto lose;
1459 #endif
1460 }
1461
1462 if (cflag == 0 && lflag == 0) {
1463 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1464 if (zfd == STDOUT_FILENO) {
1465 /* We won't close STDOUT_FILENO later... */
1466 zfd = dup(zfd);
1467 close(STDOUT_FILENO);
1468 }
1469 if (zfd == -1) {
1470 maybe_warn("can't open %s", outfile);
1471 goto lose;
1472 }
1473 #ifndef SMALL
1474 remove_file = outfile;
1475 #endif
1476 } else
1477 zfd = STDOUT_FILENO;
1478
1479 switch (method) {
1480 #ifndef NO_BZIP2_SUPPORT
1481 case FT_BZIP2:
1482 /* XXX */
1483 if (lflag) {
1484 maybe_warnx("no -l with bzip2 files");
1485 goto lose;
1486 }
1487
1488 size = unbzip2(fd, zfd, NULL, 0, NULL);
1489 break;
1490 #endif
1491
1492 #ifndef NO_COMPRESS_SUPPORT
1493 case FT_Z: {
1494 FILE *in, *out;
1495
1496 /* XXX */
1497 if (lflag) {
1498 maybe_warnx("no -l with Lempel-Ziv files");
1499 goto lose;
1500 }
1501
1502 if ((in = zdopen(fd)) == NULL) {
1503 maybe_warn("zdopen for read: %s", file);
1504 goto lose;
1505 }
1506
1507 out = fdopen(dup(zfd), "w");
1508 if (out == NULL) {
1509 maybe_warn("fdopen for write: %s", outfile);
1510 fclose(in);
1511 goto lose;
1512 }
1513
1514 size = zuncompress(in, out, NULL, 0, NULL);
1515 /* need to fclose() if ferror() is true... */
1516 if (ferror(in) | fclose(in)) {
1517 maybe_warn("failed infile fclose");
1518 unlink(outfile);
1519 (void)fclose(out);
1520 }
1521 if (fclose(out) != 0) {
1522 maybe_warn("failed outfile fclose");
1523 unlink(outfile);
1524 goto lose;
1525 }
1526 break;
1527 }
1528 #endif
1529
1530 #ifndef NO_PACK_SUPPORT
1531 case FT_PACK:
1532 if (lflag) {
1533 maybe_warnx("no -l with packed files");
1534 goto lose;
1535 }
1536
1537 size = unpack(fd, zfd, NULL, 0, NULL);
1538 break;
1539 #endif
1540
1541 #ifndef NO_XZ_SUPPORT
1542 case FT_XZ:
1543 if (lflag) {
1544 maybe_warnx("no -l with xz files");
1545 goto lose;
1546 }
1547
1548 size = unxz(fd, zfd, NULL, 0, NULL);
1549 break;
1550 #endif
1551
1552 #ifndef SMALL
1553 case FT_UNKNOWN:
1554 if (lflag) {
1555 maybe_warnx("no -l for unknown filetypes");
1556 goto lose;
1557 }
1558 size = cat_fd(NULL, 0, NULL, fd);
1559 break;
1560 #endif
1561 default:
1562 if (lflag) {
1563 print_list(fd, isb.st_size, outfile, isb.st_mtime);
1564 close(fd);
1565 return -1; /* XXX */
1566 }
1567
1568 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1569 break;
1570 }
1571
1572 if (close(fd) != 0)
1573 maybe_warn("couldn't close input");
1574 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1575 maybe_warn("couldn't close output");
1576
1577 if (size == -1) {
1578 if (cflag == 0)
1579 unlink(outfile);
1580 maybe_warnx("%s: uncompress failed", file);
1581 return -1;
1582 }
1583
1584 /* if testing, or we uncompressed to stdout, this is all we need */
1585 #ifndef SMALL
1586 if (tflag)
1587 return size;
1588 #endif
1589 /* if we are uncompressing to stdin, don't remove the file. */
1590 if (cflag)
1591 return size;
1592
1593 /*
1594 * if we create a file...
1595 */
1596 /*
1597 * if we can't stat the file don't remove the file.
1598 */
1599
1600 ofd = open(outfile, O_RDWR, 0);
1601 if (ofd == -1) {
1602 maybe_warn("couldn't open (leaving original): %s",
1603 outfile);
1604 return -1;
1605 }
1606 if (fstat(ofd, &osb) != 0) {
1607 maybe_warn("couldn't stat (leaving original): %s",
1608 outfile);
1609 close(ofd);
1610 return -1;
1611 }
1612 if (osb.st_size != size) {
1613 maybe_warnx("stat gave different size: %ju != %ju (leaving original)",
1614 (uintmax_t)size, (uintmax_t)osb.st_size);
1615 close(ofd);
1616 unlink(outfile);
1617 return -1;
1618 }
1619 #ifndef SMALL
1620 copymodes(ofd, &isb, outfile);
1621 remove_file = NULL;
1622 #endif
1623 close(ofd);
1624 unlink_input(file, &isb);
1625 return size;
1626
1627 unexpected_EOF:
1628 maybe_warnx("%s: unexpected end of file", file);
1629 lose:
1630 if (fd != -1)
1631 close(fd);
1632 if (zfd != -1 && zfd != STDOUT_FILENO)
1633 close(fd);
1634 return -1;
1635 }
1636
1637 #ifndef SMALL
1638 static off_t
1639 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd)
1640 {
1641 char buf[BUFLEN];
1642 off_t in_tot;
1643 ssize_t w;
1644
1645 in_tot = count;
1646 w = write(STDOUT_FILENO, prepend, count);
1647 if (w == -1 || (size_t)w != count) {
1648 maybe_warn("write to stdout");
1649 return -1;
1650 }
1651 for (;;) {
1652 ssize_t rv;
1653
1654 rv = read(fd, buf, sizeof buf);
1655 if (rv == 0)
1656 break;
1657 if (rv < 0) {
1658 maybe_warn("read from fd %d", fd);
1659 break;
1660 }
1661
1662 if (write(STDOUT_FILENO, buf, rv) != rv) {
1663 maybe_warn("write to stdout");
1664 break;
1665 }
1666 in_tot += rv;
1667 }
1668
1669 if (gsizep)
1670 *gsizep = in_tot;
1671 return (in_tot);
1672 }
1673 #endif
1674
1675 static void
1676 handle_stdin(void)
1677 {
1678 unsigned char header1[4];
1679 off_t usize, gsize;
1680 enum filetype method;
1681 ssize_t bytes_read;
1682 #ifndef NO_COMPRESS_SUPPORT
1683 FILE *in;
1684 #endif
1685
1686 #ifndef SMALL
1687 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1688 maybe_warnx("standard input is a terminal -- ignoring");
1689 return;
1690 }
1691 #endif
1692
1693 if (lflag) {
1694 struct stat isb;
1695
1696 /* XXX could read the whole file, etc. */
1697 if (fstat(STDIN_FILENO, &isb) < 0) {
1698 maybe_warn("fstat");
1699 return;
1700 }
1701 print_list(STDIN_FILENO, isb.st_size, "stdout", isb.st_mtime);
1702 return;
1703 }
1704
1705 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
1706 if (bytes_read == -1) {
1707 maybe_warn("can't read stdin");
1708 return;
1709 } else if (bytes_read != sizeof(header1)) {
1710 maybe_warnx("(stdin): unexpected end of file");
1711 return;
1712 }
1713
1714 method = file_gettype(header1);
1715 switch (method) {
1716 default:
1717 #ifndef SMALL
1718 if (fflag == 0) {
1719 maybe_warnx("unknown compression format");
1720 return;
1721 }
1722 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1723 break;
1724 #endif
1725 case FT_GZIP:
1726 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1727 (char *)header1, sizeof header1, &gsize, "(stdin)");
1728 break;
1729 #ifndef NO_BZIP2_SUPPORT
1730 case FT_BZIP2:
1731 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1732 (char *)header1, sizeof header1, &gsize);
1733 break;
1734 #endif
1735 #ifndef NO_COMPRESS_SUPPORT
1736 case FT_Z:
1737 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1738 maybe_warnx("zopen of stdin");
1739 return;
1740 }
1741
1742 usize = zuncompress(in, stdout, (char *)header1,
1743 sizeof header1, &gsize);
1744 fclose(in);
1745 break;
1746 #endif
1747 #ifndef NO_PACK_SUPPORT
1748 case FT_PACK:
1749 usize = unpack(STDIN_FILENO, STDOUT_FILENO,
1750 (char *)header1, sizeof header1, &gsize);
1751 break;
1752 #endif
1753 #ifndef NO_XZ_SUPPORT
1754 case FT_XZ:
1755 usize = unxz(STDIN_FILENO, STDOUT_FILENO,
1756 (char *)header1, sizeof header1, &gsize);
1757 break;
1758 #endif
1759 }
1760
1761 #ifndef SMALL
1762 if (vflag && !tflag && usize != -1 && gsize != -1)
1763 print_verbage(NULL, NULL, usize, gsize);
1764 if (vflag && tflag)
1765 print_test("(stdin)", usize != -1);
1766 #endif
1767
1768 }
1769
1770 static void
1771 handle_stdout(void)
1772 {
1773 off_t gsize, usize;
1774 struct stat sb;
1775 time_t systime;
1776 uint32_t mtime;
1777 int ret;
1778
1779 #ifndef SMALL
1780 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1781 maybe_warnx("standard output is a terminal -- ignoring");
1782 return;
1783 }
1784 #endif
1785 /* If stdin is a file use its mtime, otherwise use current time */
1786 ret = fstat(STDIN_FILENO, &sb);
1787
1788 #ifndef SMALL
1789 if (ret < 0) {
1790 maybe_warn("Can't stat stdin");
1791 return;
1792 }
1793 #endif
1794
1795 if (S_ISREG(sb.st_mode))
1796 mtime = (uint32_t)sb.st_mtime;
1797 else {
1798 systime = time(NULL);
1799 #ifndef SMALL
1800 if (systime == -1) {
1801 maybe_warn("time");
1802 return;
1803 }
1804 #endif
1805 mtime = (uint32_t)systime;
1806 }
1807
1808 usize = gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
1809 #ifndef SMALL
1810 if (vflag && !tflag && usize != -1 && gsize != -1)
1811 print_verbage(NULL, NULL, usize, gsize);
1812 #endif
1813 }
1814
1815 /* do what is asked for, for the path name */
1816 static void
1817 handle_pathname(char *path)
1818 {
1819 char *opath = path, *s = NULL;
1820 ssize_t len;
1821 int slen;
1822 struct stat sb;
1823
1824 /* check for stdout/stdin */
1825 if (path[0] == '-' && path[1] == '\0') {
1826 if (dflag)
1827 handle_stdin();
1828 else
1829 handle_stdout();
1830 return;
1831 }
1832
1833 retry:
1834 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 &&
1835 lstat(path, &sb) != 0)) {
1836 /* lets try <path>.gz if we're decompressing */
1837 if (dflag && s == NULL && errno == ENOENT) {
1838 len = strlen(path);
1839 slen = suffixes[0].ziplen;
1840 s = malloc(len + slen + 1);
1841 if (s == NULL)
1842 maybe_err("malloc");
1843 memcpy(s, path, len);
1844 memcpy(s + len, suffixes[0].zipped, slen + 1);
1845 path = s;
1846 goto retry;
1847 }
1848 maybe_warn("can't stat: %s", opath);
1849 goto out;
1850 }
1851
1852 if (S_ISDIR(sb.st_mode)) {
1853 #ifndef SMALL
1854 if (rflag)
1855 handle_dir(path);
1856 else
1857 #endif
1858 maybe_warnx("%s is a directory", path);
1859 goto out;
1860 }
1861
1862 if (S_ISREG(sb.st_mode))
1863 handle_file(path, &sb);
1864 else
1865 maybe_warnx("%s is not a regular file", path);
1866
1867 out:
1868 if (s)
1869 free(s);
1870 }
1871
1872 /* compress/decompress a file */
1873 static void
1874 handle_file(char *file, struct stat *sbp)
1875 {
1876 off_t usize, gsize;
1877 char outfile[PATH_MAX];
1878
1879 infile = file;
1880 if (dflag) {
1881 usize = file_uncompress(file, outfile, sizeof(outfile));
1882 #ifndef SMALL
1883 if (vflag && tflag)
1884 print_test(file, usize != -1);
1885 #endif
1886 if (usize == -1)
1887 return;
1888 gsize = sbp->st_size;
1889 } else {
1890 gsize = file_compress(file, outfile, sizeof(outfile));
1891 if (gsize == -1)
1892 return;
1893 usize = sbp->st_size;
1894 }
1895
1896
1897 #ifndef SMALL
1898 if (vflag && !tflag)
1899 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
1900 #endif
1901 }
1902
1903 #ifndef SMALL
1904 /* this is used with -r to recursively descend directories */
1905 static void
1906 handle_dir(char *dir)
1907 {
1908 char *path_argv[2];
1909 FTS *fts;
1910 FTSENT *entry;
1911
1912 path_argv[0] = dir;
1913 path_argv[1] = 0;
1914 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
1915 if (fts == NULL) {
1916 warn("couldn't fts_open %s", dir);
1917 return;
1918 }
1919
1920 while ((entry = fts_read(fts))) {
1921 switch(entry->fts_info) {
1922 case FTS_D:
1923 case FTS_DP:
1924 continue;
1925
1926 case FTS_DNR:
1927 case FTS_ERR:
1928 case FTS_NS:
1929 maybe_warn("%s", entry->fts_path);
1930 continue;
1931 case FTS_F:
1932 handle_file(entry->fts_path, entry->fts_statp);
1933 }
1934 }
1935 (void)fts_close(fts);
1936 }
1937 #endif
1938
1939 /* print a ratio - size reduction as a fraction of uncompressed size */
1940 static void
1941 print_ratio(off_t in, off_t out, FILE *where)
1942 {
1943 int percent10; /* 10 * percent */
1944 off_t diff;
1945 char buff[8];
1946 int len;
1947
1948 diff = in - out/2;
1949 if (diff <= 0)
1950 /*
1951 * Output is more than double size of input! print -99.9%
1952 * Quite possibly we've failed to get the original size.
1953 */
1954 percent10 = -999;
1955 else {
1956 /*
1957 * We only need 12 bits of result from the final division,
1958 * so reduce the values until a 32bit division will suffice.
1959 */
1960 while (in > 0x100000) {
1961 diff >>= 1;
1962 in >>= 1;
1963 }
1964 if (in != 0)
1965 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
1966 else
1967 percent10 = 0;
1968 }
1969
1970 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
1971 /* Move the '.' to before the last digit */
1972 buff[len - 1] = buff[len - 2];
1973 buff[len - 2] = '.';
1974 fprintf(where, "%5s%%", buff);
1975 }
1976
1977 #ifndef SMALL
1978 /* print compression statistics, and the new name (if there is one!) */
1979 static void
1980 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
1981 {
1982 if (file)
1983 fprintf(stderr, "%s:%s ", file,
1984 strlen(file) < 7 ? "\t\t" : "\t");
1985 print_ratio(usize, gsize, stderr);
1986 if (nfile)
1987 fprintf(stderr, " -- replaced with %s", nfile);
1988 fprintf(stderr, "\n");
1989 fflush(stderr);
1990 }
1991
1992 /* print test results */
1993 static void
1994 print_test(const char *file, int ok)
1995 {
1996
1997 if (exit_value == 0 && ok == 0)
1998 exit_value = 1;
1999 fprintf(stderr, "%s:%s %s\n", file,
2000 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
2001 fflush(stderr);
2002 }
2003 #endif
2004
2005 /* print a file's info ala --list */
2006 /* eg:
2007 compressed uncompressed ratio uncompressed_name
2008 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
2009 */
2010 static void
2011 print_list(int fd, off_t out, const char *outfile, time_t ts)
2012 {
2013 static int first = 1;
2014 #ifndef SMALL
2015 static off_t in_tot, out_tot;
2016 uint32_t crc = 0;
2017 #endif
2018 off_t in = 0, rv;
2019
2020 if (first) {
2021 #ifndef SMALL
2022 if (vflag)
2023 printf("method crc date time ");
2024 #endif
2025 if (qflag == 0)
2026 printf(" compressed uncompressed "
2027 "ratio uncompressed_name\n");
2028 }
2029 first = 0;
2030
2031 /* print totals? */
2032 #ifndef SMALL
2033 if (fd == -1) {
2034 in = in_tot;
2035 out = out_tot;
2036 } else
2037 #endif
2038 {
2039 /* read the last 4 bytes - this is the uncompressed size */
2040 rv = lseek(fd, (off_t)(-8), SEEK_END);
2041 if (rv != -1) {
2042 unsigned char buf[8];
2043 uint32_t usize;
2044
2045 rv = read(fd, (char *)buf, sizeof(buf));
2046 if (rv == -1)
2047 maybe_warn("read of uncompressed size");
2048 else if (rv != sizeof(buf))
2049 maybe_warnx("read of uncompressed size");
2050
2051 else {
2052 usize = buf[4] | buf[5] << 8 |
2053 buf[6] << 16 | buf[7] << 24;
2054 in = (off_t)usize;
2055 #ifndef SMALL
2056 crc = buf[0] | buf[1] << 8 |
2057 buf[2] << 16 | buf[3] << 24;
2058 #endif
2059 }
2060 }
2061 }
2062
2063 #ifndef SMALL
2064 if (vflag && fd == -1)
2065 printf(" ");
2066 else if (vflag) {
2067 char *date = ctime(&ts);
2068
2069 /* skip the day, 1/100th second, and year */
2070 date += 4;
2071 date[12] = 0;
2072 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
2073 }
2074 in_tot += in;
2075 out_tot += out;
2076 #else
2077 (void)&ts; /* XXX */
2078 #endif
2079 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
2080 print_ratio(in, out, stdout);
2081 printf(" %s\n", outfile);
2082 }
2083
2084 /* display the usage of NetBSD gzip */
2085 static void
2086 usage(void)
2087 {
2088
2089 fprintf(stderr, "%s\n", gzip_version);
2090 fprintf(stderr,
2091 #ifdef SMALL
2092 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n",
2093 #else
2094 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
2095 " -1 --fast fastest (worst) compression\n"
2096 " -2 .. -8 set compression level\n"
2097 " -9 --best best (slowest) compression\n"
2098 " -c --stdout write to stdout, keep original files\n"
2099 " --to-stdout\n"
2100 " -d --decompress uncompress files\n"
2101 " --uncompress\n"
2102 " -f --force force overwriting & compress links\n"
2103 " -h --help display this help\n"
2104 " -k --keep don't delete input files during operation\n"
2105 " -l --list list compressed file contents\n"
2106 " -N --name save or restore original file name and time stamp\n"
2107 " -n --no-name don't save original file name or time stamp\n"
2108 " -q --quiet output no warnings\n"
2109 " -r --recursive recursively compress files in directories\n"
2110 " -S .suf use suffix .suf instead of .gz\n"
2111 " --suffix .suf\n"
2112 " -t --test test compressed file\n"
2113 " -V --version display program version\n"
2114 " -v --verbose print extra statistics\n",
2115 #endif
2116 getprogname());
2117 exit(0);
2118 }
2119
2120 #ifndef SMALL
2121 /* display the license information of FreeBSD gzip */
2122 static void
2123 display_license(void)
2124 {
2125
2126 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version);
2127 fprintf(stderr, "%s\n", gzip_copyright);
2128 exit(0);
2129 }
2130 #endif
2131
2132 /* display the version of NetBSD gzip */
2133 static void
2134 display_version(void)
2135 {
2136
2137 fprintf(stderr, "%s\n", gzip_version);
2138 exit(0);
2139 }
2140
2141 #ifndef NO_BZIP2_SUPPORT
2142 #include "unbzip2.c"
2143 #endif
2144 #ifndef NO_COMPRESS_SUPPORT
2145 #include "zuncompress.c"
2146 #endif
2147 #ifndef NO_PACK_SUPPORT
2148 #include "unpack.c"
2149 #endif
2150 #ifndef NO_XZ_SUPPORT
2151 #include "unxz.c"
2152 #endif
2153
2154 static ssize_t
2155 read_retry(int fd, void *buf, size_t sz)
2156 {
2157 char *cp = buf;
2158 size_t left = MIN(sz, (size_t) SSIZE_MAX);
2159
2160 while (left > 0) {
2161 ssize_t ret;
2162
2163 ret = read(fd, cp, left);
2164 if (ret == -1) {
2165 return ret;
2166 } else if (ret == 0) {
2167 break; /* EOF */
2168 }
2169 cp += ret;
2170 left -= ret;
2171 }
2172
2173 return sz - left;
2174 }
FreeBSD src