1 /* $NetBSD: gzip.c,v 1.116 2018/10/27 11:39:12 skrll Exp $ */
2
3 /*-
4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD
5 *
6 * Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008, 2009, 2010, 2011, 2015, 2017
7 * Matthew R. Green
8 * All rights reserved.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
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 #include <sys/cdefs.h>
34 #ifndef lint
35 __COPYRIGHT("@(#) Copyright (c) 1997, 1998, 2003, 2004, 2006, 2008,\
36 2009, 2010, 2011, 2015, 2017 Matthew R. Green. All rights reserved.");
37 __FBSDID("$FreeBSD$");
38 #endif /* not lint */
39
40 /*
41 * gzip.c -- GPL free gzip using zlib.
42 *
43 * RFC 1950 covers the zlib format
44 * RFC 1951 covers the deflate format
45 * RFC 1952 covers the gzip format
46 *
47 * TODO:
48 * - use mmap where possible
49 * - make bzip2/compress -v/-t/-l support work as well as possible
50 */
51
52 #include <sys/endian.h>
53 #include <sys/param.h>
54 #include <sys/stat.h>
55 #include <sys/time.h>
56
57 #include <inttypes.h>
58 #include <unistd.h>
59 #include <stdio.h>
60 #include <string.h>
61 #include <stdlib.h>
62 #include <err.h>
63 #include <errno.h>
64 #include <fcntl.h>
65 #include <zlib.h>
66 #include <fts.h>
67 #include <libgen.h>
68 #include <stdarg.h>
69 #include <getopt.h>
70 #include <time.h>
71
72 /* what type of file are we dealing with */
73 enum filetype {
74 FT_GZIP,
75 #ifndef NO_BZIP2_SUPPORT
76 FT_BZIP2,
77 #endif
78 #ifndef NO_COMPRESS_SUPPORT
79 FT_Z,
80 #endif
81 #ifndef NO_PACK_SUPPORT
82 FT_PACK,
83 #endif
84 #ifndef NO_XZ_SUPPORT
85 FT_XZ,
86 #endif
87 #ifndef NO_LZ_SUPPORT
88 FT_LZ,
89 #endif
90 FT_LAST,
91 FT_UNKNOWN
92 };
93
94 #ifndef NO_BZIP2_SUPPORT
95 #include <bzlib.h>
96
97 #define BZ2_SUFFIX ".bz2"
98 #define BZIP2_MAGIC "BZh"
99 #endif
100
101 #ifndef NO_COMPRESS_SUPPORT
102 #define Z_SUFFIX ".Z"
103 #define Z_MAGIC "\037\235"
104 #endif
105
106 #ifndef NO_PACK_SUPPORT
107 #define PACK_MAGIC "\037\036"
108 #endif
109
110 #ifndef NO_XZ_SUPPORT
111 #include <lzma.h>
112 #define XZ_SUFFIX ".xz"
113 #define XZ_MAGIC "\3757zXZ"
114 #endif
115
116 #ifndef NO_LZ_SUPPORT
117 #define LZ_SUFFIX ".lz"
118 #define LZ_MAGIC "LZIP"
119 #endif
120
121 #define GZ_SUFFIX ".gz"
122
123 #define BUFLEN (64 * 1024)
124
125 #define GZIP_MAGIC0 0x1F
126 #define GZIP_MAGIC1 0x8B
127 #define GZIP_OMAGIC1 0x9E
128
129 #define GZIP_TIMESTAMP (off_t)4
130 #define GZIP_ORIGNAME (off_t)10
131
132 #define HEAD_CRC 0x02
133 #define EXTRA_FIELD 0x04
134 #define ORIG_NAME 0x08
135 #define COMMENT 0x10
136
137 #define OS_CODE 3 /* Unix */
138
139 typedef struct {
140 const char *zipped;
141 int ziplen;
142 const char *normal; /* for unzip - must not be longer than zipped */
143 } suffixes_t;
144 static suffixes_t suffixes[] = {
145 #define SUFFIX(Z, N) {Z, sizeof Z - 1, N}
146 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S .xxx */
147 #ifndef SMALL
148 SUFFIX(GZ_SUFFIX, ""),
149 SUFFIX(".z", ""),
150 SUFFIX("-gz", ""),
151 SUFFIX("-z", ""),
152 SUFFIX("_z", ""),
153 SUFFIX(".taz", ".tar"),
154 SUFFIX(".tgz", ".tar"),
155 #ifndef NO_BZIP2_SUPPORT
156 SUFFIX(BZ2_SUFFIX, ""),
157 SUFFIX(".tbz", ".tar"),
158 SUFFIX(".tbz2", ".tar"),
159 #endif
160 #ifndef NO_COMPRESS_SUPPORT
161 SUFFIX(Z_SUFFIX, ""),
162 #endif
163 #ifndef NO_XZ_SUPPORT
164 SUFFIX(XZ_SUFFIX, ""),
165 #endif
166 #ifndef NO_LZ_SUPPORT
167 SUFFIX(LZ_SUFFIX, ""),
168 #endif
169 SUFFIX(GZ_SUFFIX, ""), /* Overwritten by -S "" */
170 #endif /* SMALL */
171 #undef SUFFIX
172 };
173 #define NUM_SUFFIXES (nitems(suffixes))
174 #define SUFFIX_MAXLEN 30
175
176 static const char gzip_version[] = "FreeBSD gzip 20190107";
177
178 #ifndef SMALL
179 static const char gzip_copyright[] = \
180 " Copyright (c) 1997, 1998, 2003, 2004, 2006 Matthew R. Green\n"
181 " All rights reserved.\n"
182 "\n"
183 " Redistribution and use in source and binary forms, with or without\n"
184 " modification, are permitted provided that the following conditions\n"
185 " are met:\n"
186 " 1. Redistributions of source code must retain the above copyright\n"
187 " notice, this list of conditions and the following disclaimer.\n"
188 " 2. Redistributions in binary form must reproduce the above copyright\n"
189 " notice, this list of conditions and the following disclaimer in the\n"
190 " documentation and/or other materials provided with the distribution.\n"
191 "\n"
192 " THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR\n"
193 " IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES\n"
194 " OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.\n"
195 " IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,\n"
196 " INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,\n"
197 " BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;\n"
198 " LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED\n"
199 " AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,\n"
200 " OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY\n"
201 " OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF\n"
202 " SUCH DAMAGE.";
203 #endif
204
205 static int cflag; /* stdout mode */
206 static int dflag; /* decompress mode */
207 static int lflag; /* list mode */
208 static int numflag = 6; /* gzip -1..-9 value */
209
210 static const char *remove_file = NULL; /* file to be removed upon SIGINT */
211
212 static int fflag; /* force mode */
213 #ifndef SMALL
214 static int kflag; /* don't delete input files */
215 static int nflag; /* don't save name/timestamp */
216 static int Nflag; /* don't restore name/timestamp */
217 static int qflag; /* quiet mode */
218 static int rflag; /* recursive mode */
219 static int tflag; /* test */
220 static int vflag; /* verbose mode */
221 static sig_atomic_t print_info = 0;
222 #else
223 #define qflag 0
224 #define tflag 0
225 #endif
226
227 static int exit_value = 0; /* exit value */
228
229 static const char *infile; /* name of file coming in */
230
231 static void maybe_err(const char *fmt, ...) __printflike(1, 2) __dead2;
232 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
233 !defined(NO_XZ_SUPPORT)
234 static void maybe_errx(const char *fmt, ...) __printflike(1, 2) __dead2;
235 #endif
236 static void maybe_warn(const char *fmt, ...) __printflike(1, 2);
237 static void maybe_warnx(const char *fmt, ...) __printflike(1, 2);
238 static enum filetype file_gettype(u_char *);
239 #ifdef SMALL
240 #define gz_compress(if, of, sz, fn, tm) gz_compress(if, of, sz)
241 #endif
242 static off_t gz_compress(int, int, off_t *, const char *, uint32_t);
243 static off_t gz_uncompress(int, int, char *, size_t, off_t *, const char *);
244 static off_t file_compress(char *, char *, size_t);
245 static off_t file_uncompress(char *, char *, size_t);
246 static void handle_pathname(char *);
247 static void handle_file(char *, struct stat *);
248 static void handle_stdin(void);
249 static void handle_stdout(void);
250 static void print_ratio(off_t, off_t, FILE *);
251 static void print_list(int fd, off_t, const char *, time_t);
252 static void usage(void) __dead2;
253 static void display_version(void) __dead2;
254 #ifndef SMALL
255 static void display_license(void);
256 #endif
257 static const suffixes_t *check_suffix(char *, int);
258 static ssize_t read_retry(int, void *, size_t);
259 static ssize_t write_retry(int, const void *, size_t);
260 static void print_list_out(off_t, off_t, const char*);
261
262 #ifdef SMALL
263 #define infile_set(f,t) infile_set(f)
264 #endif
265 static void infile_set(const char *newinfile, off_t total);
266
267 #ifdef SMALL
268 #define unlink_input(f, sb) unlink(f)
269 #define check_siginfo() /* nothing */
270 #define setup_signals() /* nothing */
271 #define infile_newdata(t) /* nothing */
272 #else
273 static off_t infile_total; /* total expected to read/write */
274 static off_t infile_current; /* current read/write */
275
276 static void check_siginfo(void);
277 static off_t cat_fd(unsigned char *, size_t, off_t *, int fd);
278 static void prepend_gzip(char *, int *, char ***);
279 static void handle_dir(char *);
280 static void print_verbage(const char *, const char *, off_t, off_t);
281 static void print_test(const char *, int);
282 static void copymodes(int fd, const struct stat *, const char *file);
283 static int check_outfile(const char *outfile);
284 static void setup_signals(void);
285 static void infile_newdata(size_t newdata);
286 static void infile_clear(void);
287 #endif
288
289 #ifndef NO_BZIP2_SUPPORT
290 static off_t unbzip2(int, int, char *, size_t, off_t *);
291 #endif
292
293 #ifndef NO_COMPRESS_SUPPORT
294 static FILE *zdopen(int);
295 static off_t zuncompress(FILE *, FILE *, char *, size_t, off_t *);
296 #endif
297
298 #ifndef NO_PACK_SUPPORT
299 static off_t unpack(int, int, char *, size_t, off_t *);
300 #endif
301
302 #ifndef NO_XZ_SUPPORT
303 static off_t unxz(int, int, char *, size_t, off_t *);
304 static off_t unxz_len(int);
305 #endif
306
307 #ifndef NO_LZ_SUPPORT
308 static off_t unlz(int, int, char *, size_t, off_t *);
309 #endif
310
311 #ifdef SMALL
312 #define getopt_long(a,b,c,d,e) getopt(a,b,c)
313 #else
314 static const struct option longopts[] = {
315 { "stdout", no_argument, 0, 'c' },
316 { "to-stdout", no_argument, 0, 'c' },
317 { "decompress", no_argument, 0, 'd' },
318 { "uncompress", no_argument, 0, 'd' },
319 { "force", no_argument, 0, 'f' },
320 { "help", no_argument, 0, 'h' },
321 { "keep", no_argument, 0, 'k' },
322 { "list", no_argument, 0, 'l' },
323 { "no-name", no_argument, 0, 'n' },
324 { "name", no_argument, 0, 'N' },
325 { "quiet", no_argument, 0, 'q' },
326 { "recursive", no_argument, 0, 'r' },
327 { "suffix", required_argument, 0, 'S' },
328 { "test", no_argument, 0, 't' },
329 { "verbose", no_argument, 0, 'v' },
330 { "version", no_argument, 0, 'V' },
331 { "fast", no_argument, 0, '1' },
332 { "best", no_argument, 0, '9' },
333 { "ascii", no_argument, 0, 'a' },
334 { "license", no_argument, 0, 'L' },
335 { NULL, no_argument, 0, 0 },
336 };
337 #endif
338
339 int
main(int argc,char ** argv)340 main(int argc, char **argv)
341 {
342 const char *progname = getprogname();
343 #ifndef SMALL
344 char *gzip;
345 int len;
346 #endif
347 int ch;
348
349 setup_signals();
350
351 #ifndef SMALL
352 if ((gzip = getenv("GZIP")) != NULL)
353 prepend_gzip(gzip, &argc, &argv);
354 #endif
355
356 /*
357 * XXX
358 * handle being called `gunzip', `zcat' and `gzcat'
359 */
360 if (strcmp(progname, "gunzip") == 0)
361 dflag = 1;
362 else if (strcmp(progname, "zcat") == 0 ||
363 strcmp(progname, "gzcat") == 0)
364 dflag = cflag = 1;
365
366 #ifdef SMALL
367 #define OPT_LIST "123456789cdhlV"
368 #else
369 #define OPT_LIST "123456789acdfhklLNnqrS:tVv"
370 #endif
371
372 while ((ch = getopt_long(argc, argv, OPT_LIST, longopts, NULL)) != -1) {
373 switch (ch) {
374 case '1': case '2': case '3':
375 case '4': case '5': case '6':
376 case '7': case '8': case '9':
377 numflag = ch - '0';
378 break;
379 case 'c':
380 cflag = 1;
381 break;
382 case 'd':
383 dflag = 1;
384 break;
385 case 'l':
386 lflag = 1;
387 dflag = 1;
388 break;
389 case 'V':
390 display_version();
391 /* NOTREACHED */
392 #ifndef SMALL
393 case 'a':
394 fprintf(stderr, "%s: option --ascii ignored on this system\n", progname);
395 break;
396 case 'f':
397 fflag = 1;
398 break;
399 case 'k':
400 kflag = 1;
401 break;
402 case 'L':
403 display_license();
404 /* NOT REACHED */
405 case 'N':
406 nflag = 0;
407 Nflag = 1;
408 break;
409 case 'n':
410 nflag = 1;
411 Nflag = 0;
412 break;
413 case 'q':
414 qflag = 1;
415 break;
416 case 'r':
417 rflag = 1;
418 break;
419 case 'S':
420 len = strlen(optarg);
421 if (len != 0) {
422 if (len > SUFFIX_MAXLEN)
423 errx(1, "incorrect suffix: '%s': too long", optarg);
424 suffixes[0].zipped = optarg;
425 suffixes[0].ziplen = len;
426 } else {
427 suffixes[NUM_SUFFIXES - 1].zipped = "";
428 suffixes[NUM_SUFFIXES - 1].ziplen = 0;
429 }
430 break;
431 case 't':
432 cflag = 1;
433 tflag = 1;
434 dflag = 1;
435 break;
436 case 'v':
437 vflag = 1;
438 break;
439 #endif
440 default:
441 usage();
442 /* NOTREACHED */
443 }
444 }
445 argv += optind;
446 argc -= optind;
447
448 if (argc == 0) {
449 if (dflag) /* stdin mode */
450 handle_stdin();
451 else /* stdout mode */
452 handle_stdout();
453 } else {
454 do {
455 handle_pathname(argv[0]);
456 } while (*++argv);
457 }
458 #ifndef SMALL
459 if (qflag == 0 && lflag && argc > 1)
460 print_list(-1, 0, "(totals)", 0);
461 #endif
462 exit(exit_value);
463 }
464
465 /* maybe print a warning */
466 void
maybe_warn(const char * fmt,...)467 maybe_warn(const char *fmt, ...)
468 {
469 va_list ap;
470
471 if (qflag == 0) {
472 va_start(ap, fmt);
473 vwarn(fmt, ap);
474 va_end(ap);
475 }
476 if (exit_value == 0)
477 exit_value = 1;
478 }
479
480 /* ... without an errno. */
481 void
maybe_warnx(const char * fmt,...)482 maybe_warnx(const char *fmt, ...)
483 {
484 va_list ap;
485
486 if (qflag == 0) {
487 va_start(ap, fmt);
488 vwarnx(fmt, ap);
489 va_end(ap);
490 }
491 if (exit_value == 0)
492 exit_value = 1;
493 }
494
495 /* maybe print an error */
496 void
maybe_err(const char * fmt,...)497 maybe_err(const char *fmt, ...)
498 {
499 va_list ap;
500
501 if (qflag == 0) {
502 va_start(ap, fmt);
503 vwarn(fmt, ap);
504 va_end(ap);
505 }
506 exit(2);
507 }
508
509 #if !defined(NO_BZIP2_SUPPORT) || !defined(NO_PACK_SUPPORT) || \
510 !defined(NO_XZ_SUPPORT)
511 /* ... without an errno. */
512 void
maybe_errx(const char * fmt,...)513 maybe_errx(const char *fmt, ...)
514 {
515 va_list ap;
516
517 if (qflag == 0) {
518 va_start(ap, fmt);
519 vwarnx(fmt, ap);
520 va_end(ap);
521 }
522 exit(2);
523 }
524 #endif
525
526 #ifndef SMALL
527 /* split up $GZIP and prepend it to the argument list */
528 static void
prepend_gzip(char * gzip,int * argc,char *** argv)529 prepend_gzip(char *gzip, int *argc, char ***argv)
530 {
531 char *s, **nargv, **ac;
532 int nenvarg = 0, i;
533
534 /* scan how many arguments there are */
535 for (s = gzip;;) {
536 while (*s == ' ' || *s == '\t')
537 s++;
538 if (*s == 0)
539 goto count_done;
540 nenvarg++;
541 while (*s != ' ' && *s != '\t')
542 if (*s++ == 0)
543 goto count_done;
544 }
545 count_done:
546 /* punt early */
547 if (nenvarg == 0)
548 return;
549
550 *argc += nenvarg;
551 ac = *argv;
552
553 nargv = (char **)malloc((*argc + 1) * sizeof(char *));
554 if (nargv == NULL)
555 maybe_err("malloc");
556
557 /* stash this away */
558 *argv = nargv;
559
560 /* copy the program name first */
561 i = 0;
562 nargv[i++] = *(ac++);
563
564 /* take a copy of $GZIP and add it to the array */
565 s = strdup(gzip);
566 if (s == NULL)
567 maybe_err("strdup");
568 for (;;) {
569 /* Skip whitespaces. */
570 while (*s == ' ' || *s == '\t')
571 s++;
572 if (*s == 0)
573 goto copy_done;
574 nargv[i++] = s;
575 /* Find the end of this argument. */
576 while (*s != ' ' && *s != '\t')
577 if (*s++ == 0)
578 /* Argument followed by NUL. */
579 goto copy_done;
580 /* Terminate by overwriting ' ' or '\t' with NUL. */
581 *s++ = 0;
582 }
583 copy_done:
584
585 /* copy the original arguments and a NULL */
586 while (*ac)
587 nargv[i++] = *(ac++);
588 nargv[i] = NULL;
589 }
590 #endif
591
592 /* compress input to output. Return bytes read, -1 on error */
593 static off_t
gz_compress(int in,int out,off_t * gsizep,const char * origname,uint32_t mtime)594 gz_compress(int in, int out, off_t *gsizep, const char *origname, uint32_t mtime)
595 {
596 z_stream z;
597 char *outbufp, *inbufp;
598 off_t in_tot = 0, out_tot = 0;
599 ssize_t in_size;
600 int i, error;
601 uLong crc;
602 #ifdef SMALL
603 static char header[] = { GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED, 0,
604 0, 0, 0, 0,
605 0, OS_CODE };
606 #endif
607
608 outbufp = malloc(BUFLEN);
609 inbufp = malloc(BUFLEN);
610 if (outbufp == NULL || inbufp == NULL) {
611 maybe_err("malloc failed");
612 goto out;
613 }
614
615 memset(&z, 0, sizeof z);
616 z.zalloc = Z_NULL;
617 z.zfree = Z_NULL;
618 z.opaque = 0;
619
620 #ifdef SMALL
621 memcpy(outbufp, header, sizeof header);
622 i = sizeof header;
623 #else
624 if (nflag != 0) {
625 mtime = 0;
626 origname = "";
627 }
628
629 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c%c%c%s",
630 GZIP_MAGIC0, GZIP_MAGIC1, Z_DEFLATED,
631 *origname ? ORIG_NAME : 0,
632 mtime & 0xff,
633 (mtime >> 8) & 0xff,
634 (mtime >> 16) & 0xff,
635 (mtime >> 24) & 0xff,
636 numflag == 1 ? 4 : numflag == 9 ? 2 : 0,
637 OS_CODE, origname);
638 if (i >= BUFLEN)
639 /* this need PATH_MAX > BUFLEN ... */
640 maybe_err("snprintf");
641 if (*origname)
642 i++;
643 #endif
644
645 z.next_out = (unsigned char *)outbufp + i;
646 z.avail_out = BUFLEN - i;
647
648 error = deflateInit2(&z, numflag, Z_DEFLATED,
649 (-MAX_WBITS), 8, Z_DEFAULT_STRATEGY);
650 if (error != Z_OK) {
651 maybe_warnx("deflateInit2 failed");
652 in_tot = -1;
653 goto out;
654 }
655
656 crc = crc32(0L, Z_NULL, 0);
657 for (;;) {
658 if (z.avail_out == 0) {
659 if (write_retry(out, outbufp, BUFLEN) != BUFLEN) {
660 maybe_warn("write");
661 out_tot = -1;
662 goto out;
663 }
664
665 out_tot += BUFLEN;
666 z.next_out = (unsigned char *)outbufp;
667 z.avail_out = BUFLEN;
668 }
669
670 if (z.avail_in == 0) {
671 in_size = read(in, inbufp, BUFLEN);
672 if (in_size < 0) {
673 maybe_warn("read");
674 in_tot = -1;
675 goto out;
676 }
677 if (in_size == 0)
678 break;
679 infile_newdata(in_size);
680
681 crc = crc32(crc, (const Bytef *)inbufp, (unsigned)in_size);
682 in_tot += in_size;
683 z.next_in = (unsigned char *)inbufp;
684 z.avail_in = in_size;
685 }
686
687 error = deflate(&z, Z_NO_FLUSH);
688 if (error != Z_OK && error != Z_STREAM_END) {
689 maybe_warnx("deflate failed");
690 in_tot = -1;
691 goto out;
692 }
693 }
694
695 /* clean up */
696 for (;;) {
697 size_t len;
698 ssize_t w;
699
700 error = deflate(&z, Z_FINISH);
701 if (error != Z_OK && error != Z_STREAM_END) {
702 maybe_warnx("deflate failed");
703 in_tot = -1;
704 goto out;
705 }
706
707 len = (char *)z.next_out - outbufp;
708
709 w = write_retry(out, outbufp, len);
710 if (w == -1 || (size_t)w != len) {
711 maybe_warn("write");
712 out_tot = -1;
713 goto out;
714 }
715 out_tot += len;
716 z.next_out = (unsigned char *)outbufp;
717 z.avail_out = BUFLEN;
718
719 if (error == Z_STREAM_END)
720 break;
721 }
722
723 if (deflateEnd(&z) != Z_OK) {
724 maybe_warnx("deflateEnd failed");
725 in_tot = -1;
726 goto out;
727 }
728
729 i = snprintf(outbufp, BUFLEN, "%c%c%c%c%c%c%c%c",
730 (int)crc & 0xff,
731 (int)(crc >> 8) & 0xff,
732 (int)(crc >> 16) & 0xff,
733 (int)(crc >> 24) & 0xff,
734 (int)in_tot & 0xff,
735 (int)(in_tot >> 8) & 0xff,
736 (int)(in_tot >> 16) & 0xff,
737 (int)(in_tot >> 24) & 0xff);
738 if (i != 8)
739 maybe_err("snprintf");
740 if (write_retry(out, outbufp, i) != i) {
741 maybe_warn("write");
742 in_tot = -1;
743 } else
744 out_tot += i;
745
746 out:
747 if (inbufp != NULL)
748 free(inbufp);
749 if (outbufp != NULL)
750 free(outbufp);
751 if (gsizep)
752 *gsizep = out_tot;
753 return in_tot;
754 }
755
756 /*
757 * uncompress input to output then close the input. return the
758 * uncompressed size written, and put the compressed sized read
759 * into `*gsizep'.
760 */
761 static off_t
gz_uncompress(int in,int out,char * pre,size_t prelen,off_t * gsizep,const char * filename)762 gz_uncompress(int in, int out, char *pre, size_t prelen, off_t *gsizep,
763 const char *filename)
764 {
765 z_stream z;
766 char *outbufp, *inbufp;
767 off_t out_tot = -1, in_tot = 0;
768 uint32_t out_sub_tot = 0;
769 enum {
770 GZSTATE_MAGIC0,
771 GZSTATE_MAGIC1,
772 GZSTATE_METHOD,
773 GZSTATE_FLAGS,
774 GZSTATE_SKIPPING,
775 GZSTATE_EXTRA,
776 GZSTATE_EXTRA2,
777 GZSTATE_EXTRA3,
778 GZSTATE_ORIGNAME,
779 GZSTATE_COMMENT,
780 GZSTATE_HEAD_CRC1,
781 GZSTATE_HEAD_CRC2,
782 GZSTATE_INIT,
783 GZSTATE_READ,
784 GZSTATE_CRC,
785 GZSTATE_LEN,
786 } state = GZSTATE_MAGIC0;
787 int flags = 0, skip_count = 0;
788 int error = Z_STREAM_ERROR, done_reading = 0;
789 uLong crc = 0;
790 ssize_t wr;
791 int needmore = 0;
792
793 #define ADVANCE() { z.next_in++; z.avail_in--; }
794
795 if ((outbufp = malloc(BUFLEN)) == NULL) {
796 maybe_err("malloc failed");
797 goto out2;
798 }
799 if ((inbufp = malloc(BUFLEN)) == NULL) {
800 maybe_err("malloc failed");
801 goto out1;
802 }
803
804 memset(&z, 0, sizeof z);
805 z.avail_in = prelen;
806 z.next_in = (unsigned char *)pre;
807 z.avail_out = BUFLEN;
808 z.next_out = (unsigned char *)outbufp;
809 z.zalloc = NULL;
810 z.zfree = NULL;
811 z.opaque = 0;
812
813 in_tot = prelen;
814 out_tot = 0;
815
816 for (;;) {
817 check_siginfo();
818 if ((z.avail_in == 0 || needmore) && done_reading == 0) {
819 ssize_t in_size;
820
821 if (z.avail_in > 0) {
822 memmove(inbufp, z.next_in, z.avail_in);
823 }
824 z.next_in = (unsigned char *)inbufp;
825 in_size = read(in, z.next_in + z.avail_in,
826 BUFLEN - z.avail_in);
827
828 if (in_size == -1) {
829 maybe_warn("failed to read stdin");
830 goto stop_and_fail;
831 } else if (in_size == 0) {
832 done_reading = 1;
833 }
834 infile_newdata(in_size);
835
836 z.avail_in += in_size;
837 needmore = 0;
838
839 in_tot += in_size;
840 }
841 if (z.avail_in == 0) {
842 if (done_reading && state != GZSTATE_MAGIC0) {
843 maybe_warnx("%s: unexpected end of file",
844 filename);
845 goto stop_and_fail;
846 }
847 goto stop;
848 }
849 switch (state) {
850 case GZSTATE_MAGIC0:
851 if (*z.next_in != GZIP_MAGIC0) {
852 if (in_tot > 0) {
853 maybe_warnx("%s: trailing garbage "
854 "ignored", filename);
855 exit_value = 2;
856 goto stop;
857 }
858 maybe_warnx("input not gziped (MAGIC0)");
859 goto stop_and_fail;
860 }
861 ADVANCE();
862 state++;
863 out_sub_tot = 0;
864 crc = crc32(0L, Z_NULL, 0);
865 break;
866
867 case GZSTATE_MAGIC1:
868 if (*z.next_in != GZIP_MAGIC1 &&
869 *z.next_in != GZIP_OMAGIC1) {
870 maybe_warnx("input not gziped (MAGIC1)");
871 goto stop_and_fail;
872 }
873 ADVANCE();
874 state++;
875 break;
876
877 case GZSTATE_METHOD:
878 if (*z.next_in != Z_DEFLATED) {
879 maybe_warnx("unknown compression method");
880 goto stop_and_fail;
881 }
882 ADVANCE();
883 state++;
884 break;
885
886 case GZSTATE_FLAGS:
887 flags = *z.next_in;
888 ADVANCE();
889 skip_count = 6;
890 state++;
891 break;
892
893 case GZSTATE_SKIPPING:
894 if (skip_count > 0) {
895 skip_count--;
896 ADVANCE();
897 } else
898 state++;
899 break;
900
901 case GZSTATE_EXTRA:
902 if ((flags & EXTRA_FIELD) == 0) {
903 state = GZSTATE_ORIGNAME;
904 break;
905 }
906 skip_count = *z.next_in;
907 ADVANCE();
908 state++;
909 break;
910
911 case GZSTATE_EXTRA2:
912 skip_count |= ((*z.next_in) << 8);
913 ADVANCE();
914 state++;
915 break;
916
917 case GZSTATE_EXTRA3:
918 if (skip_count > 0) {
919 skip_count--;
920 ADVANCE();
921 } else
922 state++;
923 break;
924
925 case GZSTATE_ORIGNAME:
926 if ((flags & ORIG_NAME) == 0) {
927 state++;
928 break;
929 }
930 if (*z.next_in == 0)
931 state++;
932 ADVANCE();
933 break;
934
935 case GZSTATE_COMMENT:
936 if ((flags & COMMENT) == 0) {
937 state++;
938 break;
939 }
940 if (*z.next_in == 0)
941 state++;
942 ADVANCE();
943 break;
944
945 case GZSTATE_HEAD_CRC1:
946 if (flags & HEAD_CRC)
947 skip_count = 2;
948 else
949 skip_count = 0;
950 state++;
951 break;
952
953 case GZSTATE_HEAD_CRC2:
954 if (skip_count > 0) {
955 skip_count--;
956 ADVANCE();
957 } else
958 state++;
959 break;
960
961 case GZSTATE_INIT:
962 if (inflateInit2(&z, -MAX_WBITS) != Z_OK) {
963 maybe_warnx("failed to inflateInit");
964 goto stop_and_fail;
965 }
966 state++;
967 break;
968
969 case GZSTATE_READ:
970 error = inflate(&z, Z_FINISH);
971 switch (error) {
972 /* Z_BUF_ERROR goes with Z_FINISH... */
973 case Z_BUF_ERROR:
974 if (z.avail_out > 0 && !done_reading)
975 continue;
976
977 case Z_STREAM_END:
978 case Z_OK:
979 break;
980
981 case Z_NEED_DICT:
982 maybe_warnx("Z_NEED_DICT error");
983 goto stop_and_fail;
984 case Z_DATA_ERROR:
985 maybe_warnx("data stream error");
986 goto stop_and_fail;
987 case Z_STREAM_ERROR:
988 maybe_warnx("internal stream error");
989 goto stop_and_fail;
990 case Z_MEM_ERROR:
991 maybe_warnx("memory allocation error");
992 goto stop_and_fail;
993
994 default:
995 maybe_warn("unknown error from inflate(): %d",
996 error);
997 }
998 wr = BUFLEN - z.avail_out;
999
1000 if (wr != 0) {
1001 crc = crc32(crc, (const Bytef *)outbufp, (unsigned)wr);
1002 if (
1003 #ifndef SMALL
1004 /* don't write anything with -t */
1005 tflag == 0 &&
1006 #endif
1007 write_retry(out, outbufp, wr) != wr) {
1008 maybe_warn("error writing to output");
1009 goto stop_and_fail;
1010 }
1011
1012 out_tot += wr;
1013 out_sub_tot += wr;
1014 }
1015
1016 if (error == Z_STREAM_END) {
1017 inflateEnd(&z);
1018 state++;
1019 }
1020
1021 z.next_out = (unsigned char *)outbufp;
1022 z.avail_out = BUFLEN;
1023
1024 break;
1025 case GZSTATE_CRC:
1026 {
1027 uLong origcrc;
1028
1029 if (z.avail_in < 4) {
1030 if (!done_reading) {
1031 needmore = 1;
1032 continue;
1033 }
1034 maybe_warnx("truncated input");
1035 goto stop_and_fail;
1036 }
1037 origcrc = le32dec(&z.next_in[0]);
1038 if (origcrc != crc) {
1039 maybe_warnx("invalid compressed"
1040 " data--crc error");
1041 goto stop_and_fail;
1042 }
1043 }
1044
1045 z.avail_in -= 4;
1046 z.next_in += 4;
1047
1048 if (!z.avail_in && done_reading) {
1049 goto stop;
1050 }
1051 state++;
1052 break;
1053 case GZSTATE_LEN:
1054 {
1055 uLong origlen;
1056
1057 if (z.avail_in < 4) {
1058 if (!done_reading) {
1059 needmore = 1;
1060 continue;
1061 }
1062 maybe_warnx("truncated input");
1063 goto stop_and_fail;
1064 }
1065 origlen = le32dec(&z.next_in[0]);
1066
1067 if (origlen != out_sub_tot) {
1068 maybe_warnx("invalid compressed"
1069 " data--length error");
1070 goto stop_and_fail;
1071 }
1072 }
1073
1074 z.avail_in -= 4;
1075 z.next_in += 4;
1076
1077 if (error < 0) {
1078 maybe_warnx("decompression error");
1079 goto stop_and_fail;
1080 }
1081 state = GZSTATE_MAGIC0;
1082 break;
1083 }
1084 continue;
1085 stop_and_fail:
1086 out_tot = -1;
1087 stop:
1088 break;
1089 }
1090 if (state > GZSTATE_INIT)
1091 inflateEnd(&z);
1092
1093 free(inbufp);
1094 out1:
1095 free(outbufp);
1096 out2:
1097 if (gsizep)
1098 *gsizep = in_tot;
1099 return (out_tot);
1100 }
1101
1102 #ifndef SMALL
1103 /*
1104 * set the owner, mode, flags & utimes using the given file descriptor.
1105 * file is only used in possible warning messages.
1106 */
1107 static void
copymodes(int fd,const struct stat * sbp,const char * file)1108 copymodes(int fd, const struct stat *sbp, const char *file)
1109 {
1110 struct timespec times[2];
1111 struct stat sb;
1112
1113 /*
1114 * If we have no info on the input, give this file some
1115 * default values and return..
1116 */
1117 if (sbp == NULL) {
1118 mode_t mask = umask(022);
1119
1120 (void)fchmod(fd, DEFFILEMODE & ~mask);
1121 (void)umask(mask);
1122 return;
1123 }
1124 sb = *sbp;
1125
1126 /* if the chown fails, remove set-id bits as-per compress(1) */
1127 if (fchown(fd, sb.st_uid, sb.st_gid) < 0) {
1128 if (errno != EPERM)
1129 maybe_warn("couldn't fchown: %s", file);
1130 sb.st_mode &= ~(S_ISUID|S_ISGID);
1131 }
1132
1133 /* we only allow set-id and the 9 normal permission bits */
1134 sb.st_mode &= S_ISUID | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO;
1135 if (fchmod(fd, sb.st_mode) < 0)
1136 maybe_warn("couldn't fchmod: %s", file);
1137
1138 times[0] = sb.st_atim;
1139 times[1] = sb.st_mtim;
1140 if (futimens(fd, times) < 0)
1141 maybe_warn("couldn't futimens: %s", file);
1142
1143 /* only try flags if they exist already */
1144 if (sb.st_flags != 0 && fchflags(fd, sb.st_flags) < 0)
1145 maybe_warn("couldn't fchflags: %s", file);
1146 }
1147 #endif
1148
1149 /* what sort of file is this? */
1150 static enum filetype
file_gettype(u_char * buf)1151 file_gettype(u_char *buf)
1152 {
1153
1154 if (buf[0] == GZIP_MAGIC0 &&
1155 (buf[1] == GZIP_MAGIC1 || buf[1] == GZIP_OMAGIC1))
1156 return FT_GZIP;
1157 else
1158 #ifndef NO_BZIP2_SUPPORT
1159 if (memcmp(buf, BZIP2_MAGIC, 3) == 0 &&
1160 buf[3] >= '0' && buf[3] <= '9')
1161 return FT_BZIP2;
1162 else
1163 #endif
1164 #ifndef NO_COMPRESS_SUPPORT
1165 if (memcmp(buf, Z_MAGIC, 2) == 0)
1166 return FT_Z;
1167 else
1168 #endif
1169 #ifndef NO_PACK_SUPPORT
1170 if (memcmp(buf, PACK_MAGIC, 2) == 0)
1171 return FT_PACK;
1172 else
1173 #endif
1174 #ifndef NO_XZ_SUPPORT
1175 if (memcmp(buf, XZ_MAGIC, 4) == 0) /* XXX: We only have 4 bytes */
1176 return FT_XZ;
1177 else
1178 #endif
1179 #ifndef NO_LZ_SUPPORT
1180 if (memcmp(buf, LZ_MAGIC, 4) == 0)
1181 return FT_LZ;
1182 else
1183 #endif
1184 return FT_UNKNOWN;
1185 }
1186
1187 #ifndef SMALL
1188 /* check the outfile is OK. */
1189 static int
check_outfile(const char * outfile)1190 check_outfile(const char *outfile)
1191 {
1192 struct stat sb;
1193 int ok = 1;
1194
1195 if (lflag == 0 && stat(outfile, &sb) == 0) {
1196 if (fflag)
1197 unlink(outfile);
1198 else if (isatty(STDIN_FILENO)) {
1199 char ans[10] = { 'n', '\0' }; /* default */
1200
1201 fprintf(stderr, "%s already exists -- do you wish to "
1202 "overwrite (y or n)? " , outfile);
1203 (void)fgets(ans, sizeof(ans) - 1, stdin);
1204 if (ans[0] != 'y' && ans[0] != 'Y') {
1205 fprintf(stderr, "\tnot overwriting\n");
1206 ok = 0;
1207 } else
1208 unlink(outfile);
1209 } else {
1210 maybe_warnx("%s already exists -- skipping", outfile);
1211 ok = 0;
1212 }
1213 }
1214 return ok;
1215 }
1216
1217 static void
unlink_input(const char * file,const struct stat * sb)1218 unlink_input(const char *file, const struct stat *sb)
1219 {
1220 struct stat nsb;
1221
1222 if (kflag)
1223 return;
1224 if (stat(file, &nsb) != 0)
1225 /* Must be gone already */
1226 return;
1227 if (nsb.st_dev != sb->st_dev || nsb.st_ino != sb->st_ino)
1228 /* Definitely a different file */
1229 return;
1230 unlink(file);
1231 }
1232
1233 static void
got_sigint(int signo __unused)1234 got_sigint(int signo __unused)
1235 {
1236
1237 if (remove_file != NULL)
1238 unlink(remove_file);
1239 _exit(2);
1240 }
1241
1242 static void
got_siginfo(int signo __unused)1243 got_siginfo(int signo __unused)
1244 {
1245
1246 print_info = 1;
1247 }
1248
1249 static void
setup_signals(void)1250 setup_signals(void)
1251 {
1252
1253 signal(SIGINFO, got_siginfo);
1254 signal(SIGINT, got_sigint);
1255 }
1256
1257 static void
infile_newdata(size_t newdata)1258 infile_newdata(size_t newdata)
1259 {
1260
1261 infile_current += newdata;
1262 }
1263 #endif
1264
1265 static void
infile_set(const char * newinfile,off_t total)1266 infile_set(const char *newinfile, off_t total)
1267 {
1268
1269 if (newinfile)
1270 infile = newinfile;
1271 #ifndef SMALL
1272 infile_total = total;
1273 #endif
1274 }
1275
1276 static void
infile_clear(void)1277 infile_clear(void)
1278 {
1279
1280 infile = NULL;
1281 #ifndef SMALL
1282 infile_total = infile_current = 0;
1283 #endif
1284 }
1285
1286 static const suffixes_t *
check_suffix(char * file,int xlate)1287 check_suffix(char *file, int xlate)
1288 {
1289 const suffixes_t *s;
1290 int len = strlen(file);
1291 char *sp;
1292
1293 for (s = suffixes; s != suffixes + NUM_SUFFIXES; s++) {
1294 /* if it doesn't fit in "a.suf", don't bother */
1295 if (s->ziplen >= len)
1296 continue;
1297 sp = file + len - s->ziplen;
1298 if (strcmp(s->zipped, sp) != 0)
1299 continue;
1300 if (xlate)
1301 strcpy(sp, s->normal);
1302 return s;
1303 }
1304 return NULL;
1305 }
1306
1307 /*
1308 * compress the given file: create a corresponding .gz file and remove the
1309 * original.
1310 */
1311 static off_t
file_compress(char * file,char * outfile,size_t outsize)1312 file_compress(char *file, char *outfile, size_t outsize)
1313 {
1314 int in;
1315 int out;
1316 off_t size, in_size;
1317 #ifndef SMALL
1318 struct stat isb, osb;
1319 const suffixes_t *suff;
1320 #endif
1321
1322 in = open(file, O_RDONLY);
1323 if (in == -1) {
1324 maybe_warn("can't open %s", file);
1325 return (-1);
1326 }
1327
1328 #ifndef SMALL
1329 if (fstat(in, &isb) != 0) {
1330 maybe_warn("couldn't stat: %s", file);
1331 close(in);
1332 return (-1);
1333 }
1334 #endif
1335
1336 #ifndef SMALL
1337 if (fstat(in, &isb) != 0) {
1338 close(in);
1339 maybe_warn("can't stat %s", file);
1340 return -1;
1341 }
1342 infile_set(file, isb.st_size);
1343 #endif
1344
1345 if (cflag == 0) {
1346 #ifndef SMALL
1347 if (isb.st_nlink > 1 && fflag == 0) {
1348 maybe_warnx("%s has %ju other link%s -- "
1349 "skipping", file,
1350 (uintmax_t)isb.st_nlink - 1,
1351 isb.st_nlink == 1 ? "" : "s");
1352 close(in);
1353 return -1;
1354 }
1355
1356 if (fflag == 0 && (suff = check_suffix(file, 0)) &&
1357 suff->zipped[0] != 0) {
1358 maybe_warnx("%s already has %s suffix -- unchanged",
1359 file, suff->zipped);
1360 close(in);
1361 return (-1);
1362 }
1363 #endif
1364
1365 /* Add (usually) .gz to filename */
1366 if ((size_t)snprintf(outfile, outsize, "%s%s",
1367 file, suffixes[0].zipped) >= outsize)
1368 memcpy(outfile + outsize - suffixes[0].ziplen - 1,
1369 suffixes[0].zipped, suffixes[0].ziplen + 1);
1370
1371 #ifndef SMALL
1372 if (check_outfile(outfile) == 0) {
1373 close(in);
1374 return (-1);
1375 }
1376 #endif
1377 }
1378
1379 if (cflag == 0) {
1380 out = open(outfile, O_WRONLY | O_CREAT | O_EXCL, 0600);
1381 if (out == -1) {
1382 maybe_warn("could not create output: %s", outfile);
1383 fclose(stdin);
1384 return (-1);
1385 }
1386 #ifndef SMALL
1387 remove_file = outfile;
1388 #endif
1389 } else
1390 out = STDOUT_FILENO;
1391
1392 in_size = gz_compress(in, out, &size, basename(file), (uint32_t)isb.st_mtime);
1393
1394 (void)close(in);
1395
1396 /*
1397 * If there was an error, in_size will be -1.
1398 * If we compressed to stdout, just return the size.
1399 * Otherwise stat the file and check it is the correct size.
1400 * We only blow away the file if we can stat the output and it
1401 * has the expected size.
1402 */
1403 if (cflag != 0)
1404 return in_size == -1 ? -1 : size;
1405
1406 #ifndef SMALL
1407 if (fstat(out, &osb) != 0) {
1408 maybe_warn("couldn't stat: %s", outfile);
1409 goto bad_outfile;
1410 }
1411
1412 if (osb.st_size != size) {
1413 maybe_warnx("output file: %s wrong size (%ju != %ju), deleting",
1414 outfile, (uintmax_t)osb.st_size, (uintmax_t)size);
1415 goto bad_outfile;
1416 }
1417
1418 copymodes(out, &isb, outfile);
1419 remove_file = NULL;
1420 #endif
1421 if (close(out) == -1)
1422 maybe_warn("couldn't close output");
1423
1424 /* output is good, ok to delete input */
1425 unlink_input(file, &isb);
1426 return (size);
1427
1428 #ifndef SMALL
1429 bad_outfile:
1430 if (close(out) == -1)
1431 maybe_warn("couldn't close output");
1432
1433 maybe_warnx("leaving original %s", file);
1434 unlink(outfile);
1435 return (size);
1436 #endif
1437 }
1438
1439 /* uncompress the given file and remove the original */
1440 static off_t
file_uncompress(char * file,char * outfile,size_t outsize)1441 file_uncompress(char *file, char *outfile, size_t outsize)
1442 {
1443 struct stat isb, osb;
1444 off_t size;
1445 ssize_t rbytes;
1446 unsigned char header1[4];
1447 enum filetype method;
1448 int fd, ofd, zfd = -1;
1449 int error;
1450 size_t in_size;
1451 #ifndef SMALL
1452 ssize_t rv;
1453 time_t timestamp = 0;
1454 char name[PATH_MAX + 1];
1455 #endif
1456
1457 /* gather the old name info */
1458
1459 fd = open(file, O_RDONLY);
1460 if (fd < 0) {
1461 maybe_warn("can't open %s", file);
1462 goto lose;
1463 }
1464 if (fstat(fd, &isb) != 0) {
1465 maybe_warn("can't stat %s", file);
1466 goto lose;
1467 }
1468 if (S_ISREG(isb.st_mode))
1469 in_size = isb.st_size;
1470 else
1471 in_size = 0;
1472 infile_set(file, in_size);
1473
1474 strlcpy(outfile, file, outsize);
1475 if (check_suffix(outfile, 1) == NULL && !(cflag || lflag)) {
1476 maybe_warnx("%s: unknown suffix -- ignored", file);
1477 goto lose;
1478 }
1479
1480 rbytes = read(fd, header1, sizeof header1);
1481 if (rbytes != sizeof header1) {
1482 /* we don't want to fail here. */
1483 #ifndef SMALL
1484 if (fflag)
1485 goto lose;
1486 #endif
1487 if (rbytes == -1)
1488 maybe_warn("can't read %s", file);
1489 else
1490 goto unexpected_EOF;
1491 goto lose;
1492 }
1493 infile_newdata(rbytes);
1494
1495 method = file_gettype(header1);
1496 #ifndef SMALL
1497 if (fflag == 0 && method == FT_UNKNOWN) {
1498 maybe_warnx("%s: not in gzip format", file);
1499 goto lose;
1500 }
1501
1502 #endif
1503
1504 #ifndef SMALL
1505 if (method == FT_GZIP && Nflag) {
1506 unsigned char ts[4]; /* timestamp */
1507
1508 rv = pread(fd, ts, sizeof ts, GZIP_TIMESTAMP);
1509 if (rv >= 0 && rv < (ssize_t)(sizeof ts))
1510 goto unexpected_EOF;
1511 if (rv == -1) {
1512 if (!fflag)
1513 maybe_warn("can't read %s", file);
1514 goto lose;
1515 }
1516 infile_newdata(rv);
1517 timestamp = le32dec(&ts[0]);
1518
1519 if (header1[3] & ORIG_NAME) {
1520 rbytes = pread(fd, name, sizeof(name) - 1, GZIP_ORIGNAME);
1521 if (rbytes < 0) {
1522 maybe_warn("can't read %s", file);
1523 goto lose;
1524 }
1525 if (name[0] != '\0') {
1526 char *dp, *nf;
1527
1528 /* Make sure that name is NUL-terminated */
1529 name[rbytes] = '\0';
1530
1531 /* strip saved directory name */
1532 nf = strrchr(name, '/');
1533 if (nf == NULL)
1534 nf = name;
1535 else
1536 nf++;
1537
1538 /* preserve original directory name */
1539 dp = strrchr(file, '/');
1540 if (dp == NULL)
1541 dp = file;
1542 else
1543 dp++;
1544 snprintf(outfile, outsize, "%.*s%.*s",
1545 (int) (dp - file),
1546 file, (int) rbytes, nf);
1547 }
1548 }
1549 }
1550 #endif
1551 lseek(fd, 0, SEEK_SET);
1552
1553 if (cflag == 0 || lflag) {
1554 #ifndef SMALL
1555 if (isb.st_nlink > 1 && lflag == 0 && fflag == 0) {
1556 maybe_warnx("%s has %ju other links -- skipping",
1557 file, (uintmax_t)isb.st_nlink - 1);
1558 goto lose;
1559 }
1560 if (nflag == 0 && timestamp)
1561 isb.st_mtime = timestamp;
1562 if (check_outfile(outfile) == 0)
1563 goto lose;
1564 #endif
1565 }
1566
1567 if (cflag)
1568 zfd = STDOUT_FILENO;
1569 else if (lflag)
1570 zfd = -1;
1571 else {
1572 zfd = open(outfile, O_WRONLY|O_CREAT|O_EXCL, 0600);
1573 if (zfd == STDOUT_FILENO) {
1574 /* We won't close STDOUT_FILENO later... */
1575 zfd = dup(zfd);
1576 close(STDOUT_FILENO);
1577 }
1578 if (zfd == -1) {
1579 maybe_warn("can't open %s", outfile);
1580 goto lose;
1581 }
1582 remove_file = outfile;
1583 }
1584
1585 switch (method) {
1586 #ifndef NO_BZIP2_SUPPORT
1587 case FT_BZIP2:
1588 /* XXX */
1589 if (lflag) {
1590 maybe_warnx("no -l with bzip2 files");
1591 goto lose;
1592 }
1593
1594 size = unbzip2(fd, zfd, NULL, 0, NULL);
1595 break;
1596 #endif
1597
1598 #ifndef NO_COMPRESS_SUPPORT
1599 case FT_Z: {
1600 FILE *in, *out;
1601
1602 /* XXX */
1603 if (lflag) {
1604 maybe_warnx("no -l with Lempel-Ziv files");
1605 goto lose;
1606 }
1607
1608 if ((in = zdopen(fd)) == NULL) {
1609 maybe_warn("zdopen for read: %s", file);
1610 goto lose;
1611 }
1612
1613 out = fdopen(dup(zfd), "w");
1614 if (out == NULL) {
1615 maybe_warn("fdopen for write: %s", outfile);
1616 fclose(in);
1617 goto lose;
1618 }
1619
1620 size = zuncompress(in, out, NULL, 0, NULL);
1621 /* need to fclose() if ferror() is true... */
1622 error = ferror(in);
1623 if (error | fclose(in)) {
1624 if (error)
1625 maybe_warn("failed infile");
1626 else
1627 maybe_warn("failed infile fclose");
1628 if (cflag == 0)
1629 unlink(outfile);
1630 (void)fclose(out);
1631 goto lose;
1632 }
1633 if (fclose(out) != 0) {
1634 maybe_warn("failed outfile fclose");
1635 if (cflag == 0)
1636 unlink(outfile);
1637 goto lose;
1638 }
1639 break;
1640 }
1641 #endif
1642
1643 #ifndef NO_PACK_SUPPORT
1644 case FT_PACK:
1645 if (lflag) {
1646 maybe_warnx("no -l with packed files");
1647 goto lose;
1648 }
1649
1650 size = unpack(fd, zfd, NULL, 0, NULL);
1651 break;
1652 #endif
1653
1654 #ifndef NO_XZ_SUPPORT
1655 case FT_XZ:
1656 if (lflag) {
1657 size = unxz_len(fd);
1658 print_list_out(in_size, size, file);
1659 return -1;
1660 }
1661 size = unxz(fd, zfd, NULL, 0, NULL);
1662 break;
1663 #endif
1664
1665 #ifndef NO_LZ_SUPPORT
1666 case FT_LZ:
1667 if (lflag) {
1668 maybe_warnx("no -l with lzip files");
1669 goto lose;
1670 }
1671 size = unlz(fd, zfd, NULL, 0, NULL);
1672 break;
1673 #endif
1674 #ifndef SMALL
1675 case FT_UNKNOWN:
1676 if (lflag) {
1677 maybe_warnx("no -l for unknown filetypes");
1678 goto lose;
1679 }
1680 size = cat_fd(NULL, 0, NULL, fd);
1681 break;
1682 #endif
1683 default:
1684 if (lflag) {
1685 print_list(fd, in_size, outfile, isb.st_mtime);
1686 close(fd);
1687 return -1; /* XXX */
1688 }
1689
1690 size = gz_uncompress(fd, zfd, NULL, 0, NULL, file);
1691 break;
1692 }
1693
1694 if (close(fd) != 0)
1695 maybe_warn("couldn't close input");
1696 if (zfd != STDOUT_FILENO && close(zfd) != 0)
1697 maybe_warn("couldn't close output");
1698
1699 if (size == -1) {
1700 if (cflag == 0)
1701 unlink(outfile);
1702 maybe_warnx("%s: uncompress failed", file);
1703 return -1;
1704 }
1705
1706 /* if testing, or we uncompressed to stdout, this is all we need */
1707 #ifndef SMALL
1708 if (tflag)
1709 return size;
1710 #endif
1711 /* if we are uncompressing to stdin, don't remove the file. */
1712 if (cflag)
1713 return size;
1714
1715 /*
1716 * if we create a file...
1717 */
1718 /*
1719 * if we can't stat the file don't remove the file.
1720 */
1721
1722 ofd = open(outfile, O_RDWR, 0);
1723 if (ofd == -1) {
1724 maybe_warn("couldn't open (leaving original): %s",
1725 outfile);
1726 return -1;
1727 }
1728 if (fstat(ofd, &osb) != 0) {
1729 maybe_warn("couldn't stat (leaving original): %s",
1730 outfile);
1731 close(ofd);
1732 return -1;
1733 }
1734 if (osb.st_size != size) {
1735 maybe_warnx("stat gave different size: %ju != %ju (leaving original)",
1736 (uintmax_t)size, (uintmax_t)osb.st_size);
1737 close(ofd);
1738 unlink(outfile);
1739 return -1;
1740 }
1741 #ifndef SMALL
1742 copymodes(ofd, &isb, outfile);
1743 remove_file = NULL;
1744 #endif
1745 close(ofd);
1746 unlink_input(file, &isb);
1747 return size;
1748
1749 unexpected_EOF:
1750 maybe_warnx("%s: unexpected end of file", file);
1751 lose:
1752 if (fd != -1)
1753 close(fd);
1754 if (zfd != -1 && zfd != STDOUT_FILENO)
1755 close(zfd);
1756 return -1;
1757 }
1758
1759 #ifndef SMALL
1760 static void
check_siginfo(void)1761 check_siginfo(void)
1762 {
1763 if (print_info == 0)
1764 return;
1765 if (infile) {
1766 if (infile_total) {
1767 int pcent = (int)((100.0 * infile_current) / infile_total);
1768
1769 fprintf(stderr, "%s: done %llu/%llu bytes %d%%\n",
1770 infile, (unsigned long long)infile_current,
1771 (unsigned long long)infile_total, pcent);
1772 } else
1773 fprintf(stderr, "%s: done %llu bytes\n",
1774 infile, (unsigned long long)infile_current);
1775 }
1776 print_info = 0;
1777 }
1778
1779 static off_t
cat_fd(unsigned char * prepend,size_t count,off_t * gsizep,int fd)1780 cat_fd(unsigned char * prepend, size_t count, off_t *gsizep, int fd)
1781 {
1782 char buf[BUFLEN];
1783 off_t in_tot;
1784 ssize_t w;
1785
1786 in_tot = count;
1787 w = write_retry(STDOUT_FILENO, prepend, count);
1788 if (w == -1 || (size_t)w != count) {
1789 maybe_warn("write to stdout");
1790 return -1;
1791 }
1792 for (;;) {
1793 ssize_t rv;
1794
1795 rv = read(fd, buf, sizeof buf);
1796 if (rv == 0)
1797 break;
1798 if (rv < 0) {
1799 maybe_warn("read from fd %d", fd);
1800 break;
1801 }
1802 infile_newdata(rv);
1803
1804 if (write_retry(STDOUT_FILENO, buf, rv) != rv) {
1805 maybe_warn("write to stdout");
1806 break;
1807 }
1808 in_tot += rv;
1809 }
1810
1811 if (gsizep)
1812 *gsizep = in_tot;
1813 return (in_tot);
1814 }
1815 #endif
1816
1817 static void
handle_stdin(void)1818 handle_stdin(void)
1819 {
1820 struct stat isb;
1821 unsigned char header1[4];
1822 size_t in_size;
1823 off_t usize, gsize;
1824 enum filetype method;
1825 ssize_t bytes_read;
1826 #ifndef NO_COMPRESS_SUPPORT
1827 FILE *in;
1828 #endif
1829
1830 #ifndef SMALL
1831 if (fflag == 0 && lflag == 0 && isatty(STDIN_FILENO)) {
1832 maybe_warnx("standard input is a terminal -- ignoring");
1833 goto out;
1834 }
1835 #endif
1836
1837 if (fstat(STDIN_FILENO, &isb) < 0) {
1838 maybe_warn("fstat");
1839 goto out;
1840 }
1841 if (S_ISREG(isb.st_mode))
1842 in_size = isb.st_size;
1843 else
1844 in_size = 0;
1845 infile_set("(stdin)", in_size);
1846
1847 if (lflag) {
1848 print_list(STDIN_FILENO, in_size, infile, isb.st_mtime);
1849 goto out;
1850 }
1851
1852 bytes_read = read_retry(STDIN_FILENO, header1, sizeof header1);
1853 if (bytes_read == -1) {
1854 maybe_warn("can't read stdin");
1855 goto out;
1856 } else if (bytes_read != sizeof(header1)) {
1857 maybe_warnx("(stdin): unexpected end of file");
1858 goto out;
1859 }
1860
1861 method = file_gettype(header1);
1862 switch (method) {
1863 default:
1864 #ifndef SMALL
1865 if (fflag == 0) {
1866 maybe_warnx("unknown compression format");
1867 goto out;
1868 }
1869 usize = cat_fd(header1, sizeof header1, &gsize, STDIN_FILENO);
1870 break;
1871 #endif
1872 case FT_GZIP:
1873 usize = gz_uncompress(STDIN_FILENO, STDOUT_FILENO,
1874 (char *)header1, sizeof header1, &gsize, "(stdin)");
1875 break;
1876 #ifndef NO_BZIP2_SUPPORT
1877 case FT_BZIP2:
1878 usize = unbzip2(STDIN_FILENO, STDOUT_FILENO,
1879 (char *)header1, sizeof header1, &gsize);
1880 break;
1881 #endif
1882 #ifndef NO_COMPRESS_SUPPORT
1883 case FT_Z:
1884 if ((in = zdopen(STDIN_FILENO)) == NULL) {
1885 maybe_warnx("zopen of stdin");
1886 goto out;
1887 }
1888
1889 usize = zuncompress(in, stdout, (char *)header1,
1890 sizeof header1, &gsize);
1891 fclose(in);
1892 break;
1893 #endif
1894 #ifndef NO_PACK_SUPPORT
1895 case FT_PACK:
1896 usize = unpack(STDIN_FILENO, STDOUT_FILENO,
1897 (char *)header1, sizeof header1, &gsize);
1898 break;
1899 #endif
1900 #ifndef NO_XZ_SUPPORT
1901 case FT_XZ:
1902 usize = unxz(STDIN_FILENO, STDOUT_FILENO,
1903 (char *)header1, sizeof header1, &gsize);
1904 break;
1905 #endif
1906 #ifndef NO_LZ_SUPPORT
1907 case FT_LZ:
1908 usize = unlz(STDIN_FILENO, STDOUT_FILENO,
1909 (char *)header1, sizeof header1, &gsize);
1910 break;
1911 #endif
1912 }
1913
1914 #ifndef SMALL
1915 if (vflag && !tflag && usize != -1 && gsize != -1)
1916 print_verbage(NULL, NULL, usize, gsize);
1917 if (vflag && tflag)
1918 print_test("(stdin)", usize != -1);
1919 #else
1920 (void)&usize;
1921 #endif
1922
1923 out:
1924 infile_clear();
1925 }
1926
1927 static void
handle_stdout(void)1928 handle_stdout(void)
1929 {
1930 off_t gsize;
1931 #ifndef SMALL
1932 off_t usize;
1933 struct stat sb;
1934 time_t systime;
1935 uint32_t mtime;
1936 int ret;
1937
1938 infile_set("(stdout)", 0);
1939
1940 if (fflag == 0 && isatty(STDOUT_FILENO)) {
1941 maybe_warnx("standard output is a terminal -- ignoring");
1942 return;
1943 }
1944
1945 /* If stdin is a file use its mtime, otherwise use current time */
1946 ret = fstat(STDIN_FILENO, &sb);
1947 if (ret < 0) {
1948 maybe_warn("Can't stat stdin");
1949 return;
1950 }
1951
1952 if (S_ISREG(sb.st_mode)) {
1953 infile_set("(stdout)", sb.st_size);
1954 mtime = (uint32_t)sb.st_mtime;
1955 } else {
1956 systime = time(NULL);
1957 if (systime == -1) {
1958 maybe_warn("time");
1959 return;
1960 }
1961 mtime = (uint32_t)systime;
1962 }
1963
1964 usize =
1965 #endif
1966 gz_compress(STDIN_FILENO, STDOUT_FILENO, &gsize, "", mtime);
1967 #ifndef SMALL
1968 if (vflag && !tflag && usize != -1 && gsize != -1)
1969 print_verbage(NULL, NULL, usize, gsize);
1970 #endif
1971 }
1972
1973 /* do what is asked for, for the path name */
1974 static void
handle_pathname(char * path)1975 handle_pathname(char *path)
1976 {
1977 char *opath = path, *s = NULL;
1978 ssize_t len;
1979 int slen;
1980 struct stat sb;
1981
1982 /* check for stdout/stdin */
1983 if (path[0] == '-' && path[1] == '\0') {
1984 if (dflag)
1985 handle_stdin();
1986 else
1987 handle_stdout();
1988 return;
1989 }
1990
1991 retry:
1992 if (stat(path, &sb) != 0 || (fflag == 0 && cflag == 0 &&
1993 lstat(path, &sb) != 0)) {
1994 /* lets try <path>.gz if we're decompressing */
1995 if (dflag && s == NULL && errno == ENOENT) {
1996 len = strlen(path);
1997 slen = suffixes[0].ziplen;
1998 s = malloc(len + slen + 1);
1999 if (s == NULL)
2000 maybe_err("malloc");
2001 memcpy(s, path, len);
2002 memcpy(s + len, suffixes[0].zipped, slen + 1);
2003 path = s;
2004 goto retry;
2005 }
2006 maybe_warn("can't stat: %s", opath);
2007 goto out;
2008 }
2009
2010 if (S_ISDIR(sb.st_mode)) {
2011 #ifndef SMALL
2012 if (rflag)
2013 handle_dir(path);
2014 else
2015 #endif
2016 maybe_warnx("%s is a directory", path);
2017 goto out;
2018 }
2019
2020 if (S_ISREG(sb.st_mode))
2021 handle_file(path, &sb);
2022 else
2023 maybe_warnx("%s is not a regular file", path);
2024
2025 out:
2026 if (s)
2027 free(s);
2028 }
2029
2030 /* compress/decompress a file */
2031 static void
handle_file(char * file,struct stat * sbp)2032 handle_file(char *file, struct stat *sbp)
2033 {
2034 off_t usize, gsize;
2035 char outfile[PATH_MAX];
2036
2037 infile_set(file, sbp->st_size);
2038 if (dflag) {
2039 usize = file_uncompress(file, outfile, sizeof(outfile));
2040 #ifndef SMALL
2041 if (vflag && tflag)
2042 print_test(file, usize != -1);
2043 #endif
2044 if (usize == -1)
2045 return;
2046 gsize = sbp->st_size;
2047 } else {
2048 gsize = file_compress(file, outfile, sizeof(outfile));
2049 if (gsize == -1)
2050 return;
2051 usize = sbp->st_size;
2052 }
2053 infile_clear();
2054
2055 #ifndef SMALL
2056 if (vflag && !tflag)
2057 print_verbage(file, (cflag) ? NULL : outfile, usize, gsize);
2058 #endif
2059 }
2060
2061 #ifndef SMALL
2062 /* this is used with -r to recursively descend directories */
2063 static void
handle_dir(char * dir)2064 handle_dir(char *dir)
2065 {
2066 char *path_argv[2];
2067 FTS *fts;
2068 FTSENT *entry;
2069
2070 path_argv[0] = dir;
2071 path_argv[1] = 0;
2072 fts = fts_open(path_argv, FTS_PHYSICAL | FTS_NOCHDIR, NULL);
2073 if (fts == NULL) {
2074 warn("couldn't fts_open %s", dir);
2075 return;
2076 }
2077
2078 while ((entry = fts_read(fts))) {
2079 switch(entry->fts_info) {
2080 case FTS_D:
2081 case FTS_DP:
2082 continue;
2083
2084 case FTS_DNR:
2085 case FTS_ERR:
2086 case FTS_NS:
2087 maybe_warn("%s", entry->fts_path);
2088 continue;
2089 case FTS_F:
2090 handle_file(entry->fts_path, entry->fts_statp);
2091 }
2092 }
2093 (void)fts_close(fts);
2094 }
2095 #endif
2096
2097 /* print a ratio - size reduction as a fraction of uncompressed size */
2098 static void
print_ratio(off_t in,off_t out,FILE * where)2099 print_ratio(off_t in, off_t out, FILE *where)
2100 {
2101 int percent10; /* 10 * percent */
2102 off_t diff;
2103 char buff[8];
2104 int len;
2105
2106 diff = in - out/2;
2107 if (in == 0 && out == 0)
2108 percent10 = 0;
2109 else if (diff < 0)
2110 /*
2111 * Output is more than double size of input! print -99.9%
2112 * Quite possibly we've failed to get the original size.
2113 */
2114 percent10 = -999;
2115 else {
2116 /*
2117 * We only need 12 bits of result from the final division,
2118 * so reduce the values until a 32bit division will suffice.
2119 */
2120 while (in > 0x100000) {
2121 diff >>= 1;
2122 in >>= 1;
2123 }
2124 if (in != 0)
2125 percent10 = ((u_int)diff * 2000) / (u_int)in - 1000;
2126 else
2127 percent10 = 0;
2128 }
2129
2130 len = snprintf(buff, sizeof buff, "%2.2d.", percent10);
2131 /* Move the '.' to before the last digit */
2132 buff[len - 1] = buff[len - 2];
2133 buff[len - 2] = '.';
2134 fprintf(where, "%5s%%", buff);
2135 }
2136
2137 #ifndef SMALL
2138 /* print compression statistics, and the new name (if there is one!) */
2139 static void
print_verbage(const char * file,const char * nfile,off_t usize,off_t gsize)2140 print_verbage(const char *file, const char *nfile, off_t usize, off_t gsize)
2141 {
2142 if (file)
2143 fprintf(stderr, "%s:%s ", file,
2144 strlen(file) < 7 ? "\t\t" : "\t");
2145 print_ratio(usize, gsize, stderr);
2146 if (nfile)
2147 fprintf(stderr, " -- replaced with %s", nfile);
2148 fprintf(stderr, "\n");
2149 fflush(stderr);
2150 }
2151
2152 /* print test results */
2153 static void
print_test(const char * file,int ok)2154 print_test(const char *file, int ok)
2155 {
2156
2157 if (exit_value == 0 && ok == 0)
2158 exit_value = 1;
2159 fprintf(stderr, "%s:%s %s\n", file,
2160 strlen(file) < 7 ? "\t\t" : "\t", ok ? "OK" : "NOT OK");
2161 fflush(stderr);
2162 }
2163 #endif
2164
2165 /* print a file's info ala --list */
2166 /* eg:
2167 compressed uncompressed ratio uncompressed_name
2168 354841 1679360 78.8% /usr/pkgsrc/distfiles/libglade-2.0.1.tar
2169 */
2170 static void
print_list(int fd,off_t out,const char * outfile,time_t ts)2171 print_list(int fd, off_t out, const char *outfile, time_t ts)
2172 {
2173 static int first = 1;
2174 #ifndef SMALL
2175 static off_t in_tot, out_tot;
2176 uint32_t crc = 0;
2177 #endif
2178 off_t in = 0, rv;
2179
2180 if (first) {
2181 #ifndef SMALL
2182 if (vflag)
2183 printf("method crc date time ");
2184 #endif
2185 if (qflag == 0)
2186 printf(" compressed uncompressed "
2187 "ratio uncompressed_name\n");
2188 }
2189 first = 0;
2190
2191 /* print totals? */
2192 #ifndef SMALL
2193 if (fd == -1) {
2194 in = in_tot;
2195 out = out_tot;
2196 } else
2197 #endif
2198 {
2199 /* read the last 4 bytes - this is the uncompressed size */
2200 rv = lseek(fd, (off_t)(-8), SEEK_END);
2201 if (rv != -1) {
2202 unsigned char buf[8];
2203 uint32_t usize;
2204
2205 rv = read(fd, (char *)buf, sizeof(buf));
2206 if (rv == -1)
2207 maybe_warn("read of uncompressed size");
2208 else if (rv != sizeof(buf))
2209 maybe_warnx("read of uncompressed size");
2210
2211 else {
2212 usize = le32dec(&buf[4]);
2213 in = (off_t)usize;
2214 #ifndef SMALL
2215 crc = le32dec(&buf[0]);
2216 #endif
2217 }
2218 }
2219 }
2220
2221 #ifndef SMALL
2222 if (vflag && fd == -1)
2223 printf(" ");
2224 else if (vflag) {
2225 char *date = ctime(&ts);
2226
2227 /* skip the day, 1/100th second, and year */
2228 date += 4;
2229 date[12] = 0;
2230 printf("%5s %08x %11s ", "defla"/*XXX*/, crc, date);
2231 }
2232 in_tot += in;
2233 out_tot += out;
2234 #else
2235 (void)&ts; /* XXX */
2236 #endif
2237 print_list_out(out, in, outfile);
2238 }
2239
2240 static void
print_list_out(off_t out,off_t in,const char * outfile)2241 print_list_out(off_t out, off_t in, const char *outfile)
2242 {
2243 printf("%12llu %12llu ", (unsigned long long)out, (unsigned long long)in);
2244 print_ratio(in, out, stdout);
2245 printf(" %s\n", outfile);
2246 }
2247
2248 /* display the usage of NetBSD gzip */
2249 static void
usage(void)2250 usage(void)
2251 {
2252
2253 fprintf(stderr, "%s\n", gzip_version);
2254 fprintf(stderr,
2255 #ifdef SMALL
2256 "usage: %s [-" OPT_LIST "] [<file> [<file> ...]]\n",
2257 #else
2258 "usage: %s [-123456789acdfhklLNnqrtVv] [-S .suffix] [<file> [<file> ...]]\n"
2259 " -1 --fast fastest (worst) compression\n"
2260 " -2 .. -8 set compression level\n"
2261 " -9 --best best (slowest) compression\n"
2262 " -c --stdout write to stdout, keep original files\n"
2263 " --to-stdout\n"
2264 " -d --decompress uncompress files\n"
2265 " --uncompress\n"
2266 " -f --force force overwriting & compress links\n"
2267 " -h --help display this help\n"
2268 " -k --keep don't delete input files during operation\n"
2269 " -l --list list compressed file contents\n"
2270 " -N --name save or restore original file name and time stamp\n"
2271 " -n --no-name don't save original file name or time stamp\n"
2272 " -q --quiet output no warnings\n"
2273 " -r --recursive recursively compress files in directories\n"
2274 " -S .suf use suffix .suf instead of .gz\n"
2275 " --suffix .suf\n"
2276 " -t --test test compressed file\n"
2277 " -V --version display program version\n"
2278 " -v --verbose print extra statistics\n",
2279 #endif
2280 getprogname());
2281 exit(0);
2282 }
2283
2284 #ifndef SMALL
2285 /* display the license information of FreeBSD gzip */
2286 static void
display_license(void)2287 display_license(void)
2288 {
2289
2290 fprintf(stderr, "%s (based on NetBSD gzip 20150113)\n", gzip_version);
2291 fprintf(stderr, "%s\n", gzip_copyright);
2292 exit(0);
2293 }
2294 #endif
2295
2296 /* display the version of NetBSD gzip */
2297 static void
display_version(void)2298 display_version(void)
2299 {
2300
2301 fprintf(stderr, "%s\n", gzip_version);
2302 exit(0);
2303 }
2304
2305 #ifndef NO_BZIP2_SUPPORT
2306 #include "unbzip2.c"
2307 #endif
2308 #ifndef NO_COMPRESS_SUPPORT
2309 #include "zuncompress.c"
2310 #endif
2311 #ifndef NO_PACK_SUPPORT
2312 #include "unpack.c"
2313 #endif
2314 #ifndef NO_XZ_SUPPORT
2315 #include "unxz.c"
2316 #endif
2317 #ifndef NO_LZ_SUPPORT
2318 #include "unlz.c"
2319 #endif
2320
2321 static ssize_t
read_retry(int fd,void * buf,size_t sz)2322 read_retry(int fd, void *buf, size_t sz)
2323 {
2324 char *cp = buf;
2325 size_t left = MIN(sz, (size_t) SSIZE_MAX);
2326
2327 while (left > 0) {
2328 ssize_t ret;
2329
2330 ret = read(fd, cp, left);
2331 if (ret == -1) {
2332 return ret;
2333 } else if (ret == 0) {
2334 break; /* EOF */
2335 }
2336 cp += ret;
2337 left -= ret;
2338 }
2339
2340 return sz - left;
2341 }
2342
2343 static ssize_t
write_retry(int fd,const void * buf,size_t sz)2344 write_retry(int fd, const void *buf, size_t sz)
2345 {
2346 const char *cp = buf;
2347 size_t left = MIN(sz, (size_t) SSIZE_MAX);
2348
2349 while (left > 0) {
2350 ssize_t ret;
2351
2352 ret = write(fd, cp, left);
2353 if (ret == -1) {
2354 return ret;
2355 } else if (ret == 0) {
2356 abort(); /* Can't happen */
2357 }
2358 cp += ret;
2359 left -= ret;
2360 }
2361
2362 return sz - left;
2363 }
2364