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- Committer: Bazaar Package Importer
- Author(s): Martin Pitt
- Date: 2011-10-19 11:42:42 UTC
- mfrom: (4.1.3 sid)
- Revision ID: james.westby@ubuntu.com-20111019114242-d8wiiu8kbvdtgmgj
Tags: 1.4-1ubuntu1
* Merge with Debian testing. Remaining Ubuntu changes:
- debian/{control,rules}: Remove the Win32 build and mingw64
build-dependency, since mingw is in universe, and will remain so for
the forseeable future.
- debian/{control,rules}: Remove the Win32 build and mingw64
build-dependency, since mingw is in universe, and will remain so for
the forseeable future.
added
removed
.pc/rsyncable.diff/gzip.c
1
/* gzip (GNU zip) -- compress files with zip algorithm and 'compress' interface
2
3
Copyright (C) 1999, 2001-2002, 2006-2007, 2009-2010 Free Software
4
Foundation, Inc.
5
Copyright (C) 1992-1993 Jean-loup Gailly
6
7
This program is free software; you can redistribute it and/or modify
8
it under the terms of the GNU General Public License as published by
9
the Free Software Foundation; either version 3, or (at your option)
10
any later version.
11
12
This program is distributed in the hope that it will be useful,
13
but WITHOUT ANY WARRANTY; without even the implied warranty of
14
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15
GNU General Public License for more details.
16
17
You should have received a copy of the GNU General Public License
18
along with this program; if not, write to the Free Software Foundation,
19
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20
21
/*
22
* The unzip code was written and put in the public domain by Mark Adler.
23
* Portions of the lzw code are derived from the public domain 'compress'
24
* written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies,
25
* Ken Turkowski, Dave Mack and Peter Jannesen.
26
*
27
* See the license_msg below and the file COPYING for the software license.
28
* See the file algorithm.doc for the compression algorithms and file formats.
29
*/
30
31
static char const *const license_msg[] = {
32
"Copyright (C) 2007 Free Software Foundation, Inc.",
33
"Copyright (C) 1993 Jean-loup Gailly.",
34
"This is free software. You may redistribute copies of it under the terms of",
35
"the GNU General Public License <http://www.gnu.org/licenses/gpl.html>.",
36
"There is NO WARRANTY, to the extent permitted by law.",
37
0};
38
39
/* Compress files with zip algorithm and 'compress' interface.
40
* See help() function below for all options.
41
* Outputs:
42
* file.gz: compressed file with same mode, owner, and utimes
43
* or stdout with -c option or if stdin used as input.
44
* If the output file name had to be truncated, the original name is kept
45
* in the compressed file.
46
* On MSDOS, file.tmp -> file.tmz. On VMS, file.tmp -> file.tmp-gz.
47
*
48
* Using gz on MSDOS would create too many file name conflicts. For
49
* example, foo.txt -> foo.tgz (.tgz must be reserved as shorthand for
50
* tar.gz). Similarly, foo.dir and foo.doc would both be mapped to foo.dgz.
51
* I also considered 12345678.txt -> 12345txt.gz but this truncates the name
52
* too heavily. There is no ideal solution given the MSDOS 8+3 limitation.
53
*
54
* For the meaning of all compilation flags, see comments in Makefile.in.
55
*/
56
57
#include <config.h>
58
#include <ctype.h>
59
#include <sys/types.h>
60
#include <signal.h>
61
#include <sys/stat.h>
62
#include <errno.h>
63
64
#include "closein.h"
65
#include "tailor.h"
66
#include "gzip.h"
67
#include "lzw.h"
68
#include "revision.h"
69
70
#include "fcntl-safer.h"
71
#include "getopt.h"
72
#include "ignore-value.h"
73
#include "stat-time.h"
74
75
/* configuration */
76
77
#include <fcntl.h>
78
#include <limits.h>
79
#include <unistd.h>
80
#include <stdlib.h>
81
#include <errno.h>
82
83
#ifndef NO_DIR
84
# define NO_DIR 0
85
#endif
86
#if !NO_DIR
87
# include <dirent.h>
88
# ifndef _D_EXACT_NAMLEN
89
# define _D_EXACT_NAMLEN(dp) strlen ((dp)->d_name)
90
# endif
91
#endif
92
93
#ifdef CLOSEDIR_VOID
94
# define CLOSEDIR(d) (closedir(d), 0)
95
#else
96
# define CLOSEDIR(d) closedir(d)
97
#endif
98
99
#ifndef NO_UTIME
100
# include <utimens.h>
101
#endif
102
103
#define RW_USER (S_IRUSR | S_IWUSR) /* creation mode for open() */
104
105
#ifndef MAX_PATH_LEN
106
# define MAX_PATH_LEN 1024 /* max pathname length */
107
#endif
108
109
#ifndef SEEK_END
110
# define SEEK_END 2
111
#endif
112
113
#ifndef CHAR_BIT
114
# define CHAR_BIT 8
115
#endif
116
117
#ifdef off_t
118
off_t lseek OF((int fd, off_t offset, int whence));
119
#endif
120
121
#ifndef OFF_T_MIN
122
#define OFF_T_MIN (~ (off_t) 0 << (sizeof (off_t) * CHAR_BIT - 1))
123
#endif
124
125
#ifndef OFF_T_MAX
126
#define OFF_T_MAX (~ (off_t) 0 - OFF_T_MIN)
127
#endif
128
129
/* Use SA_NOCLDSTOP as a proxy for whether the sigaction machinery is
130
present. */
131
#ifndef SA_NOCLDSTOP
132
# define SA_NOCLDSTOP 0
133
# define sigprocmask(how, set, oset) /* empty */
134
# define sigset_t int
135
# if ! HAVE_SIGINTERRUPT
136
# define siginterrupt(sig, flag) /* empty */
137
# endif
138
#endif
139
140
#ifndef HAVE_WORKING_O_NOFOLLOW
141
# define HAVE_WORKING_O_NOFOLLOW 0
142
#endif
143
144
#ifndef ELOOP
145
# define ELOOP EINVAL
146
#endif
147
148
/* Separator for file name parts (see shorten_name()) */
149
#ifdef NO_MULTIPLE_DOTS
150
# define PART_SEP "-"
151
#else
152
# define PART_SEP "."
153
#endif
154
155
/* global buffers */
156
157
DECLARE(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
158
DECLARE(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
159
DECLARE(ush, d_buf, DIST_BUFSIZE);
160
DECLARE(uch, window, 2L*WSIZE);
161
#ifndef MAXSEG_64K
162
DECLARE(ush, tab_prefix, 1L<<BITS);
163
#else
164
DECLARE(ush, tab_prefix0, 1L<<(BITS-1));
165
DECLARE(ush, tab_prefix1, 1L<<(BITS-1));
166
#endif
167
168
/* local variables */
169
170
int ascii = 0; /* convert end-of-lines to local OS conventions */
171
int to_stdout = 0; /* output to stdout (-c) */
172
int decompress = 0; /* decompress (-d) */
173
int force = 0; /* don't ask questions, compress links (-f) */
174
int no_name = -1; /* don't save or restore the original file name */
175
int no_time = -1; /* don't save or restore the original file time */
176
int recursive = 0; /* recurse through directories (-r) */
177
int list = 0; /* list the file contents (-l) */
178
int verbose = 0; /* be verbose (-v) */
179
int quiet = 0; /* be very quiet (-q) */
180
int do_lzw = 0; /* generate output compatible with old compress (-Z) */
181
int test = 0; /* test .gz file integrity */
182
int foreground = 0; /* set if program run in foreground */
183
char *program_name; /* program name */
184
int maxbits = BITS; /* max bits per code for LZW */
185
int method = DEFLATED;/* compression method */
186
int level = 6; /* compression level */
187
int exit_code = OK; /* program exit code */
188
int save_orig_name; /* set if original name must be saved */
189
int last_member; /* set for .zip and .Z files */
190
int part_nb; /* number of parts in .gz file */
191
struct timespec time_stamp; /* original time stamp (modification time) */
192
off_t ifile_size; /* input file size, -1 for devices (debug only) */
193
char *env; /* contents of GZIP env variable */
194
char **args = NULL; /* argv pointer if GZIP env variable defined */
195
char const *z_suffix; /* default suffix (can be set with --suffix) */
196
size_t z_len; /* strlen(z_suffix) */
197
198
/* The set of signals that are caught. */
199
static sigset_t caught_signals;
200
201
/* If nonzero then exit with status WARNING, rather than with the usual
202
signal status, on receipt of a signal with this value. This
203
suppresses a "Broken Pipe" message with some shells. */
204
static int volatile exiting_signal;
205
206
/* If nonnegative, close this file descriptor and unlink ofname on error. */
207
static int volatile remove_ofname_fd = -1;
208
209
off_t bytes_in; /* number of input bytes */
210
off_t bytes_out; /* number of output bytes */
211
off_t total_in; /* input bytes for all files */
212
off_t total_out; /* output bytes for all files */
213
char ifname[MAX_PATH_LEN]; /* input file name */
214
char ofname[MAX_PATH_LEN]; /* output file name */
215
struct stat istat; /* status for input file */
216
int ifd; /* input file descriptor */
217
int ofd; /* output file descriptor */
218
unsigned insize; /* valid bytes in inbuf */
219
unsigned inptr; /* index of next byte to be processed in inbuf */
220
unsigned outcnt; /* bytes in output buffer */
221
222
static int handled_sig[] =
223
{
224
/* SIGINT must be first, as 'foreground' depends on it. */
225
SIGINT
226
227
#ifdef SIGHUP
228
, SIGHUP
229
#endif
230
#ifdef SIGPIPE
231
, SIGPIPE
232
#else
233
# define SIGPIPE 0
234
#endif
235
#ifdef SIGTERM
236
, SIGTERM
237
#endif
238
#ifdef SIGXCPU
239
, SIGXCPU
240
#endif
241
#ifdef SIGXFSZ
242
, SIGXFSZ
243
#endif
244
};
245
246
struct option longopts[] =
247
{
248
/* { name has_arg *flag val } */
249
{"ascii", 0, 0, 'a'}, /* ascii text mode */
250
{"to-stdout", 0, 0, 'c'}, /* write output on standard output */
251
{"stdout", 0, 0, 'c'}, /* write output on standard output */
252
{"decompress", 0, 0, 'd'}, /* decompress */
253
{"uncompress", 0, 0, 'd'}, /* decompress */
254
/* {"encrypt", 0, 0, 'e'}, encrypt */
255
{"force", 0, 0, 'f'}, /* force overwrite of output file */
256
{"help", 0, 0, 'h'}, /* give help */
257
/* {"pkzip", 0, 0, 'k'}, force output in pkzip format */
258
{"list", 0, 0, 'l'}, /* list .gz file contents */
259
{"license", 0, 0, 'L'}, /* display software license */
260
{"no-name", 0, 0, 'n'}, /* don't save or restore original name & time */
261
{"name", 0, 0, 'N'}, /* save or restore original name & time */
262
{"quiet", 0, 0, 'q'}, /* quiet mode */
263
{"silent", 0, 0, 'q'}, /* quiet mode */
264
{"recursive", 0, 0, 'r'}, /* recurse through directories */
265
{"suffix", 1, 0, 'S'}, /* use given suffix instead of .gz */
266
{"test", 0, 0, 't'}, /* test compressed file integrity */
267
{"no-time", 0, 0, 'T'}, /* don't save or restore the time stamp */
268
{"verbose", 0, 0, 'v'}, /* verbose mode */
269
{"version", 0, 0, 'V'}, /* display version number */
270
{"fast", 0, 0, '1'}, /* compress faster */
271
{"best", 0, 0, '9'}, /* compress better */
272
{"lzw", 0, 0, 'Z'}, /* make output compatible with old compress */
273
{"bits", 1, 0, 'b'}, /* max number of bits per code (implies -Z) */
274
{ 0, 0, 0, 0 }
275
};
276
277
/* local functions */
278
279
local void try_help OF((void)) ATTRIBUTE_NORETURN;
280
local void help OF((void));
281
local void license OF((void));
282
local void version OF((void));
283
local int input_eof OF((void));
284
local void treat_stdin OF((void));
285
local void treat_file OF((char *iname));
286
local int create_outfile OF((void));
287
local char *get_suffix OF((char *name));
288
local int open_input_file OF((char *iname, struct stat *sbuf));
289
local int make_ofname OF((void));
290
local void shorten_name OF((char *name));
291
local int get_method OF((int in));
292
local void do_list OF((int ifd, int method));
293
local int check_ofname OF((void));
294
local void copy_stat OF((struct stat *ifstat));
295
local void install_signal_handlers OF((void));
296
local void remove_output_file OF((void));
297
local RETSIGTYPE abort_gzip_signal OF((int));
298
local void do_exit OF((int exitcode)) ATTRIBUTE_NORETURN;
299
int main OF((int argc, char **argv));
300
int (*work) OF((int infile, int outfile)) = zip; /* function to call */
301
302
#if ! NO_DIR
303
local void treat_dir OF((int fd, char *dir));
304
#endif
305
306
#define strequ(s1, s2) (strcmp((s1),(s2)) == 0)
307
308
static void
309
try_help ()
310
{
311
fprintf (stderr, "Try `%s --help' for more information.\n",
312
program_name);
313
do_exit (ERROR);
314
}
315
316
/* ======================================================================== */
317
local void help()
318
{
319
static char const* const help_msg[] = {
320
"Compress or uncompress FILEs (by default, compress FILES in-place).",
321
"",
322
"Mandatory arguments to long options are mandatory for short options too.",
323
"",
324
#if O_BINARY
325
" -a, --ascii ascii text; convert end-of-line using local conventions",
326
#endif
327
" -c, --stdout write on standard output, keep original files unchanged",
328
" -d, --decompress decompress",
329
/* -e, --encrypt encrypt */
330
" -f, --force force overwrite of output file and compress links",
331
" -h, --help give this help",
332
/* -k, --pkzip force output in pkzip format */
333
" -l, --list list compressed file contents",
334
" -L, --license display software license",
335
#ifdef UNDOCUMENTED
336
" -m, --no-time do not save or restore the original modification time",
337
" -M, --time save or restore the original modification time",
338
#endif
339
" -n, --no-name do not save or restore the original name and time stamp",
340
" -N, --name save or restore the original name and time stamp",
341
" -q, --quiet suppress all warnings",
342
#if ! NO_DIR
343
" -r, --recursive operate recursively on directories",
344
#endif
345
" -S, --suffix=SUF use suffix SUF on compressed files",
346
" -t, --test test compressed file integrity",
347
" -v, --verbose verbose mode",
348
" -V, --version display version number",
349
" -1, --fast compress faster",
350
" -9, --best compress better",
351
#ifdef LZW
352
" -Z, --lzw produce output compatible with old compress",
353
" -b, --bits=BITS max number of bits per code (implies -Z)",
354
#endif
355
"",
356
"With no FILE, or when FILE is -, read standard input.",
357
"",
358
"Report bugs to <bug-gzip@gnu.org>.",
359
0};
360
char const *const *p = help_msg;
361
362
printf ("Usage: %s [OPTION]... [FILE]...\n", program_name);
363
while (*p) printf ("%s\n", *p++);
364
}
365
366
/* ======================================================================== */
367
local void license()
368
{
369
char const *const *p = license_msg;
370
371
printf ("%s %s\n", program_name, VERSION);
372
while (*p) printf ("%s\n", *p++);
373
}
374
375
/* ======================================================================== */
376
local void version()
377
{
378
license ();
379
printf ("\n");
380
printf ("Written by Jean-loup Gailly.\n");
381
}
382
383
local void progerror (char const *string)
384
{
385
int e = errno;
386
fprintf (stderr, "%s: ", program_name);
387
errno = e;
388
perror(string);
389
exit_code = ERROR;
390
}
391
392
/* ======================================================================== */
393
int main (int argc, char **argv)
394
{
395
int file_count; /* number of files to process */
396
size_t proglen; /* length of program_name */
397
int optc; /* current option */
398
399
EXPAND(argc, argv); /* wild card expansion if necessary */
400
401
program_name = gzip_base_name (argv[0]);
402
proglen = strlen (program_name);
403
404
atexit (close_stdin);
405
406
/* Suppress .exe for MSDOS, OS/2 and VMS: */
407
if (4 < proglen && strequ (program_name + proglen - 4, ".exe"))
408
program_name[proglen - 4] = '\0';
409
410
/* Add options in GZIP environment variable if there is one */
411
env = add_envopt(&argc, &argv, OPTIONS_VAR);
412
if (env != NULL) args = argv;
413
414
#ifndef GNU_STANDARD
415
# define GNU_STANDARD 1
416
#endif
417
#if !GNU_STANDARD
418
/* For compatibility with old compress, use program name as an option.
419
* Unless you compile with -DGNU_STANDARD=0, this program will behave as
420
* gzip even if it is invoked under the name gunzip or zcat.
421
*
422
* Systems which do not support links can still use -d or -dc.
423
* Ignore an .exe extension for MSDOS, OS/2 and VMS.
424
*/
425
if (strncmp (program_name, "un", 2) == 0 /* ungzip, uncompress */
426
|| strncmp (program_name, "gun", 3) == 0) /* gunzip */
427
decompress = 1;
428
else if (strequ (program_name + 1, "cat") /* zcat, pcat, gcat */
429
|| strequ (program_name, "gzcat")) /* gzcat */
430
decompress = to_stdout = 1;
431
#endif
432
433
z_suffix = Z_SUFFIX;
434
z_len = strlen(z_suffix);
435
436
while ((optc = getopt_long (argc, argv, "ab:cdfhH?lLmMnNqrS:tvVZ123456789",
437
longopts, (int *)0)) != -1) {
438
switch (optc) {
439
case 'a':
440
ascii = 1; break;
441
case 'b':
442
maxbits = atoi(optarg);
443
for (; *optarg; optarg++)
444
if (! ('0' <= *optarg && *optarg <= '9'))
445
{
446
fprintf (stderr, "%s: -b operand is not an integer\n",
447
program_name);
448
try_help ();
449
}
450
break;
451
case 'c':
452
to_stdout = 1; break;
453
case 'd':
454
decompress = 1; break;
455
case 'f':
456
force++; break;
457
case 'h': case 'H':
458
help(); do_exit(OK); break;
459
case 'l':
460
list = decompress = to_stdout = 1; break;
461
case 'L':
462
license(); do_exit(OK); break;
463
case 'm': /* undocumented, may change later */
464
no_time = 1; break;
465
case 'M': /* undocumented, may change later */
466
no_time = 0; break;
467
case 'n':
468
no_name = no_time = 1; break;
469
case 'N':
470
no_name = no_time = 0; break;
471
case 'q':
472
quiet = 1; verbose = 0; break;
473
case 'r':
474
#if NO_DIR
475
fprintf (stderr, "%s: -r not supported on this system\n",
476
program_name);
477
try_help ();
478
#else
479
recursive = 1;
480
#endif
481
break;
482
case 'S':
483
#ifdef NO_MULTIPLE_DOTS
484
if (*optarg == '.') optarg++;
485
#endif
486
z_len = strlen(optarg);
487
z_suffix = optarg;
488
break;
489
case 't':
490
test = decompress = to_stdout = 1;
491
break;
492
case 'v':
493
verbose++; quiet = 0; break;
494
case 'V':
495
version(); do_exit(OK); break;
496
case 'Z':
497
#ifdef LZW
498
do_lzw = 1; break;
499
#else
500
fprintf(stderr, "%s: -Z not supported in this version\n",
501
program_name);
502
try_help ();
503
break;
504
#endif
505
case '1': case '2': case '3': case '4':
506
case '5': case '6': case '7': case '8': case '9':
507
level = optc - '0';
508
break;
509
default:
510
/* Error message already emitted by getopt_long. */
511
try_help ();
512
}
513
} /* loop on all arguments */
514
515
/* By default, save name and timestamp on compression but do not
516
* restore them on decompression.
517
*/
518
if (no_time < 0) no_time = decompress;
519
if (no_name < 0) no_name = decompress;
520
521
file_count = argc - optind;
522
523
#if O_BINARY
524
#else
525
if (ascii && !quiet) {
526
fprintf(stderr, "%s: option --ascii ignored on this system\n",
527
program_name);
528
}
529
#endif
530
if ((z_len == 0 && !decompress) || z_len > MAX_SUFFIX) {
531
fprintf(stderr, "%s: incorrect suffix '%s'\n",
532
program_name, z_suffix);
533
do_exit(ERROR);
534
}
535
if (do_lzw && !decompress) work = lzw;
536
537
/* Allocate all global buffers (for DYN_ALLOC option) */
538
ALLOC(uch, inbuf, INBUFSIZ +INBUF_EXTRA);
539
ALLOC(uch, outbuf, OUTBUFSIZ+OUTBUF_EXTRA);
540
ALLOC(ush, d_buf, DIST_BUFSIZE);
541
ALLOC(uch, window, 2L*WSIZE);
542
#ifndef MAXSEG_64K
543
ALLOC(ush, tab_prefix, 1L<<BITS);
544
#else
545
ALLOC(ush, tab_prefix0, 1L<<(BITS-1));
546
ALLOC(ush, tab_prefix1, 1L<<(BITS-1));
547
#endif
548
549
exiting_signal = quiet ? SIGPIPE : 0;
550
install_signal_handlers ();
551
552
/* And get to work */
553
if (file_count != 0) {
554
if (to_stdout && !test && !list && (!decompress || !ascii)) {
555
SET_BINARY_MODE(fileno(stdout));
556
}
557
while (optind < argc) {
558
treat_file(argv[optind++]);
559
}
560
} else { /* Standard input */
561
treat_stdin();
562
}
563
if (list && !quiet && file_count > 1) {
564
do_list(-1, -1); /* print totals */
565
}
566
do_exit(exit_code);
567
return exit_code; /* just to avoid lint warning */
568
}
569
570
/* Return nonzero when at end of file on input. */
571
local int
572
input_eof ()
573
{
574
if (!decompress || last_member)
575
return 1;
576
577
if (inptr == insize)
578
{
579
if (insize != INBUFSIZ || fill_inbuf (1) == EOF)
580
return 1;
581
582
/* Unget the char that fill_inbuf got. */
583
inptr = 0;
584
}
585
586
return 0;
587
}
588
589
/* ========================================================================
590
* Compress or decompress stdin
591
*/
592
local void treat_stdin()
593
{
594
if (!force && !list &&
595
isatty(fileno((FILE *)(decompress ? stdin : stdout)))) {
596
/* Do not send compressed data to the terminal or read it from
597
* the terminal. We get here when user invoked the program
598
* without parameters, so be helpful. According to the GNU standards:
599
*
600
* If there is one behavior you think is most useful when the output
601
* is to a terminal, and another that you think is most useful when
602
* the output is a file or a pipe, then it is usually best to make
603
* the default behavior the one that is useful with output to a
604
* terminal, and have an option for the other behavior.
605
*
606
* Here we use the --force option to get the other behavior.
607
*/
608
fprintf(stderr,
609
"%s: compressed data not %s a terminal. Use -f to force %scompression.\n",
610
program_name, decompress ? "read from" : "written to",
611
decompress ? "de" : "");
612
fprintf (stderr, "For help, type: %s -h\n", program_name);
613
do_exit(ERROR);
614
}
615
616
if (decompress || !ascii) {
617
SET_BINARY_MODE(fileno(stdin));
618
}
619
if (!test && !list && (!decompress || !ascii)) {
620
SET_BINARY_MODE(fileno(stdout));
621
}
622
strcpy(ifname, "stdin");
623
strcpy(ofname, "stdout");
624
625
/* Get the file's time stamp and size. */
626
if (fstat (fileno (stdin), &istat) != 0)
627
{
628
progerror ("standard input");
629
do_exit (ERROR);
630
}
631
ifile_size = S_ISREG (istat.st_mode) ? istat.st_size : -1;
632
time_stamp.tv_nsec = -1;
633
if (!no_time || list)
634
time_stamp = get_stat_mtime (&istat);
635
636
clear_bufs(); /* clear input and output buffers */
637
to_stdout = 1;
638
part_nb = 0;
639
ifd = fileno(stdin);
640
641
if (decompress) {
642
method = get_method(ifd);
643
if (method < 0) {
644
do_exit(exit_code); /* error message already emitted */
645
}
646
}
647
if (list) {
648
do_list(ifd, method);
649
return;
650
}
651
652
/* Actually do the compression/decompression. Loop over zipped members.
653
*/
654
for (;;) {
655
if ((*work)(fileno(stdin), fileno(stdout)) != OK) return;
656
657
if (input_eof ())
658
break;
659
660
method = get_method(ifd);
661
if (method < 0) return; /* error message already emitted */
662
bytes_out = 0; /* required for length check */
663
}
664
665
if (verbose) {
666
if (test) {
667
fprintf(stderr, " OK\n");
668
669
} else if (!decompress) {
670
display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
671
fprintf(stderr, "\n");
672
#ifdef DISPLAY_STDIN_RATIO
673
} else {
674
display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out,stderr);
675
fprintf(stderr, "\n");
676
#endif
677
}
678
}
679
}
680
681
/* ========================================================================
682
* Compress or decompress the given file
683
*/
684
local void treat_file(iname)
685
char *iname;
686
{
687
/* Accept "-" as synonym for stdin */
688
if (strequ(iname, "-")) {
689
int cflag = to_stdout;
690
treat_stdin();
691
to_stdout = cflag;
692
return;
693
}
694
695
/* Check if the input file is present, set ifname and istat: */
696
ifd = open_input_file (iname, &istat);
697
if (ifd < 0)
698
return;
699
700
/* If the input name is that of a directory, recurse or ignore: */
701
if (S_ISDIR(istat.st_mode)) {
702
#if ! NO_DIR
703
if (recursive) {
704
treat_dir (ifd, iname);
705
/* Warning: ifname is now garbage */
706
return;
707
}
708
#endif
709
close (ifd);
710
WARN ((stderr, "%s: %s is a directory -- ignored\n",
711
program_name, ifname));
712
return;
713
}
714
715
if (! to_stdout)
716
{
717
if (! S_ISREG (istat.st_mode))
718
{
719
WARN ((stderr,
720
"%s: %s is not a directory or a regular file - ignored\n",
721
program_name, ifname));
722
close (ifd);
723
return;
724
}
725
if (istat.st_mode & S_ISUID)
726
{
727
WARN ((stderr, "%s: %s is set-user-ID on execution - ignored\n",
728
program_name, ifname));
729
close (ifd);
730
return;
731
}
732
if (istat.st_mode & S_ISGID)
733
{
734
WARN ((stderr, "%s: %s is set-group-ID on execution - ignored\n",
735
program_name, ifname));
736
close (ifd);
737
return;
738
}
739
740
if (! force)
741
{
742
if (istat.st_mode & S_ISVTX)
743
{
744
WARN ((stderr,
745
"%s: %s has the sticky bit set - file ignored\n",
746
program_name, ifname));
747
close (ifd);
748
return;
749
}
750
if (2 <= istat.st_nlink)
751
{
752
WARN ((stderr, "%s: %s has %lu other link%c -- unchanged\n",
753
program_name, ifname,
754
(unsigned long int) istat.st_nlink - 1,
755
istat.st_nlink == 2 ? ' ' : 's'));
756
close (ifd);
757
return;
758
}
759
}
760
}
761
762
ifile_size = S_ISREG (istat.st_mode) ? istat.st_size : -1;
763
time_stamp.tv_nsec = -1;
764
if (!no_time || list)
765
time_stamp = get_stat_mtime (&istat);
766
767
/* Generate output file name. For -r and (-t or -l), skip files
768
* without a valid gzip suffix (check done in make_ofname).
769
*/
770
if (to_stdout && !list && !test) {
771
strcpy(ofname, "stdout");
772
773
} else if (make_ofname() != OK) {
774
close (ifd);
775
return;
776
}
777
778
clear_bufs(); /* clear input and output buffers */
779
part_nb = 0;
780
781
if (decompress) {
782
method = get_method(ifd); /* updates ofname if original given */
783
if (method < 0) {
784
close(ifd);
785
return; /* error message already emitted */
786
}
787
}
788
if (list) {
789
do_list(ifd, method);
790
if (close (ifd) != 0)
791
read_error ();
792
return;
793
}
794
795
/* If compressing to a file, check if ofname is not ambiguous
796
* because the operating system truncates names. Otherwise, generate
797
* a new ofname and save the original name in the compressed file.
798
*/
799
if (to_stdout) {
800
ofd = fileno(stdout);
801
/* Keep remove_ofname_fd negative. */
802
} else {
803
if (create_outfile() != OK) return;
804
805
if (!decompress && save_orig_name && !verbose && !quiet) {
806
fprintf(stderr, "%s: %s compressed to %s\n",
807
program_name, ifname, ofname);
808
}
809
}
810
/* Keep the name even if not truncated except with --no-name: */
811
if (!save_orig_name) save_orig_name = !no_name;
812
813
if (verbose) {
814
fprintf(stderr, "%s:\t", ifname);
815
}
816
817
/* Actually do the compression/decompression. Loop over zipped members.
818
*/
819
for (;;) {
820
if ((*work)(ifd, ofd) != OK) {
821
method = -1; /* force cleanup */
822
break;
823
}
824
825
if (input_eof ())
826
break;
827
828
method = get_method(ifd);
829
if (method < 0) break; /* error message already emitted */
830
bytes_out = 0; /* required for length check */
831
}
832
833
if (close (ifd) != 0)
834
read_error ();
835
836
if (!to_stdout)
837
{
838
sigset_t oldset;
839
int unlink_errno;
840
841
copy_stat (&istat);
842
if (close (ofd) != 0)
843
write_error ();
844
845
sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
846
remove_ofname_fd = -1;
847
unlink_errno = xunlink (ifname) == 0 ? 0 : errno;
848
sigprocmask (SIG_SETMASK, &oldset, NULL);
849
850
if (unlink_errno)
851
{
852
WARN ((stderr, "%s: ", program_name));
853
if (!quiet)
854
{
855
errno = unlink_errno;
856
perror (ifname);
857
}
858
}
859
}
860
861
if (method == -1) {
862
if (!to_stdout)
863
remove_output_file ();
864
return;
865
}
866
867
/* Display statistics */
868
if(verbose) {
869
if (test) {
870
fprintf(stderr, " OK");
871
} else if (decompress) {
872
display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out,stderr);
873
} else {
874
display_ratio(bytes_in-(bytes_out-header_bytes), bytes_in, stderr);
875
}
876
if (!test && !to_stdout) {
877
fprintf(stderr, " -- replaced with %s", ofname);
878
}
879
fprintf(stderr, "\n");
880
}
881
}
882
883
/* ========================================================================
884
* Create the output file. Return OK or ERROR.
885
* Try several times if necessary to avoid truncating the z_suffix. For
886
* example, do not create a compressed file of name "1234567890123."
887
* Sets save_orig_name to true if the file name has been truncated.
888
* IN assertions: the input file has already been open (ifd is set) and
889
* ofname has already been updated if there was an original name.
890
* OUT assertions: ifd and ofd are closed in case of error.
891
*/
892
local int create_outfile()
893
{
894
int name_shortened = 0;
895
int flags = (O_WRONLY | O_CREAT | O_EXCL
896
| (ascii && decompress ? 0 : O_BINARY));
897
898
for (;;)
899
{
900
int open_errno;
901
sigset_t oldset;
902
903
sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
904
remove_ofname_fd = ofd = OPEN (ofname, flags, RW_USER);
905
open_errno = errno;
906
sigprocmask (SIG_SETMASK, &oldset, NULL);
907
908
if (0 <= ofd)
909
break;
910
911
switch (open_errno)
912
{
913
#ifdef ENAMETOOLONG
914
case ENAMETOOLONG:
915
shorten_name (ofname);
916
name_shortened = 1;
917
break;
918
#endif
919
920
case EEXIST:
921
if (check_ofname () != OK)
922
{
923
close (ifd);
924
return ERROR;
925
}
926
break;
927
928
default:
929
progerror (ofname);
930
close (ifd);
931
return ERROR;
932
}
933
}
934
935
if (name_shortened && decompress)
936
{
937
/* name might be too long if an original name was saved */
938
WARN ((stderr, "%s: %s: warning, name truncated\n",
939
program_name, ofname));
940
}
941
942
return OK;
943
}
944
945
/* ========================================================================
946
* Return a pointer to the 'z' suffix of a file name, or NULL. For all
947
* systems, ".gz", ".z", ".Z", ".taz", ".tgz", "-gz", "-z" and "_z" are
948
* accepted suffixes, in addition to the value of the --suffix option.
949
* ".tgz" is a useful convention for tar.z files on systems limited
950
* to 3 characters extensions. On such systems, ".?z" and ".??z" are
951
* also accepted suffixes. For Unix, we do not want to accept any
952
* .??z suffix as indicating a compressed file; some people use .xyz
953
* to denote volume data.
954
* On systems allowing multiple versions of the same file (such as VMS),
955
* this function removes any version suffix in the given name.
956
*/
957
local char *get_suffix(name)
958
char *name;
959
{
960
int nlen, slen;
961
char suffix[MAX_SUFFIX+3]; /* last chars of name, forced to lower case */
962
static char const *known_suffixes[] =
963
{NULL, ".gz", ".z", ".taz", ".tgz", "-gz", "-z", "_z",
964
#ifdef MAX_EXT_CHARS
965
"z",
966
#endif
967
NULL};
968
char const **suf = known_suffixes;
969
970
*suf = z_suffix;
971
if (strequ(z_suffix, "z")) suf++; /* check long suffixes first */
972
973
#ifdef SUFFIX_SEP
974
/* strip a version number from the file name */
975
{
976
char *v = strrchr(name, SUFFIX_SEP);
977
if (v != NULL) *v = '\0';
978
}
979
#endif
980
nlen = strlen(name);
981
if (nlen <= MAX_SUFFIX+2) {
982
strcpy(suffix, name);
983
} else {
984
strcpy(suffix, name+nlen-MAX_SUFFIX-2);
985
}
986
strlwr(suffix);
987
slen = strlen(suffix);
988
do {
989
int s = strlen(*suf);
990
if (slen > s && suffix[slen-s-1] != PATH_SEP
991
&& strequ(suffix + slen - s, *suf)) {
992
return name+nlen-s;
993
}
994
} while (*++suf != NULL);
995
996
return NULL;
997
}
998
999
1000
/* Open file NAME with the given flags and mode and store its status
1001
into *ST. Return a file descriptor to the newly opened file, or -1
1002
(setting errno) on failure. */
1003
static int
1004
open_and_stat (char *name, int flags, mode_t mode, struct stat *st)
1005
{
1006
int fd;
1007
1008
/* Refuse to follow symbolic links unless -c or -f. */
1009
if (!to_stdout && !force)
1010
{
1011
if (HAVE_WORKING_O_NOFOLLOW)
1012
flags |= O_NOFOLLOW;
1013
else
1014
{
1015
#if HAVE_LSTAT || defined lstat
1016
if (lstat (name, st) != 0)
1017
return -1;
1018
else if (S_ISLNK (st->st_mode))
1019
{
1020
errno = ELOOP;
1021
return -1;
1022
}
1023
#endif
1024
}
1025
}
1026
1027
fd = OPEN (name, flags, mode);
1028
if (0 <= fd && fstat (fd, st) != 0)
1029
{
1030
int e = errno;
1031
close (fd);
1032
errno = e;
1033
return -1;
1034
}
1035
return fd;
1036
}
1037
1038
1039
/* ========================================================================
1040
* Set ifname to the input file name (with a suffix appended if necessary)
1041
* and istat to its stats. For decompression, if no file exists with the
1042
* original name, try adding successively z_suffix, .gz, .z, -z and .Z.
1043
* For MSDOS, we try only z_suffix and z.
1044
* Return an open file descriptor or -1.
1045
*/
1046
static int
1047
open_input_file (iname, sbuf)
1048
char *iname;
1049
struct stat *sbuf;
1050
{
1051
int ilen; /* strlen(ifname) */
1052
int z_suffix_errno = 0;
1053
static char const *suffixes[] = {NULL, ".gz", ".z", "-z", ".Z", NULL};
1054
char const **suf = suffixes;
1055
char const *s;
1056
#ifdef NO_MULTIPLE_DOTS
1057
char *dot; /* pointer to ifname extension, or NULL */
1058
#endif
1059
int fd;
1060
int open_flags = (O_RDONLY | O_NONBLOCK | O_NOCTTY
1061
| (ascii && !decompress ? 0 : O_BINARY));
1062
1063
*suf = z_suffix;
1064
1065
if (sizeof ifname - 1 <= strlen (iname))
1066
goto name_too_long;
1067
1068
strcpy(ifname, iname);
1069
1070
/* If input file exists, return OK. */
1071
fd = open_and_stat (ifname, open_flags, RW_USER, sbuf);
1072
if (0 <= fd)
1073
return fd;
1074
1075
if (!decompress || errno != ENOENT) {
1076
progerror(ifname);
1077
return -1;
1078
}
1079
/* file.ext doesn't exist, try adding a suffix (after removing any
1080
* version number for VMS).
1081
*/
1082
s = get_suffix(ifname);
1083
if (s != NULL) {
1084
progerror(ifname); /* ifname already has z suffix and does not exist */
1085
return -1;
1086
}
1087
#ifdef NO_MULTIPLE_DOTS
1088
dot = strrchr(ifname, '.');
1089
if (dot == NULL) {
1090
strcat(ifname, ".");
1091
dot = strrchr(ifname, '.');
1092
}
1093
#endif
1094
ilen = strlen(ifname);
1095
if (strequ(z_suffix, ".gz")) suf++;
1096
1097
/* Search for all suffixes */
1098
do {
1099
char const *s0 = s = *suf;
1100
strcpy (ifname, iname);
1101
#ifdef NO_MULTIPLE_DOTS
1102
if (*s == '.') s++;
1103
if (*dot == '\0') strcpy (dot, ".");
1104
#endif
1105
#ifdef MAX_EXT_CHARS
1106
if (MAX_EXT_CHARS < strlen (s) + strlen (dot + 1))
1107
dot[MAX_EXT_CHARS + 1 - strlen (s)] = '\0';
1108
#endif
1109
if (sizeof ifname <= ilen + strlen (s))
1110
goto name_too_long;
1111
strcat(ifname, s);
1112
fd = open_and_stat (ifname, open_flags, RW_USER, sbuf);
1113
if (0 <= fd)
1114
return fd;
1115
if (errno != ENOENT)
1116
{
1117
progerror (ifname);
1118
return -1;
1119
}
1120
if (strequ (s0, z_suffix))
1121
z_suffix_errno = errno;
1122
} while (*++suf != NULL);
1123
1124
/* No suffix found, complain using z_suffix: */
1125
strcpy(ifname, iname);
1126
#ifdef NO_MULTIPLE_DOTS
1127
if (*dot == '\0') strcpy(dot, ".");
1128
#endif
1129
#ifdef MAX_EXT_CHARS
1130
if (MAX_EXT_CHARS < z_len + strlen (dot + 1))
1131
dot[MAX_EXT_CHARS + 1 - z_len] = '\0';
1132
#endif
1133
strcat(ifname, z_suffix);
1134
errno = z_suffix_errno;
1135
progerror(ifname);
1136
return -1;
1137
1138
name_too_long:
1139
fprintf (stderr, "%s: %s: file name too long\n", program_name, iname);
1140
exit_code = ERROR;
1141
return -1;
1142
}
1143
1144
/* ========================================================================
1145
* Generate ofname given ifname. Return OK, or WARNING if file must be skipped.
1146
* Sets save_orig_name to true if the file name has been truncated.
1147
*/
1148
local int make_ofname()
1149
{
1150
char *suff; /* ofname z suffix */
1151
1152
strcpy(ofname, ifname);
1153
/* strip a version number if any and get the gzip suffix if present: */
1154
suff = get_suffix(ofname);
1155
1156
if (decompress) {
1157
if (suff == NULL) {
1158
/* With -t or -l, try all files (even without .gz suffix)
1159
* except with -r (behave as with just -dr).
1160
*/
1161
if (!recursive && (list || test)) return OK;
1162
1163
/* Avoid annoying messages with -r */
1164
if (verbose || (!recursive && !quiet)) {
1165
WARN((stderr,"%s: %s: unknown suffix -- ignored\n",
1166
program_name, ifname));
1167
}
1168
return WARNING;
1169
}
1170
/* Make a special case for .tgz and .taz: */
1171
strlwr(suff);
1172
if (strequ(suff, ".tgz") || strequ(suff, ".taz")) {
1173
strcpy(suff, ".tar");
1174
} else {
1175
*suff = '\0'; /* strip the z suffix */
1176
}
1177
/* ofname might be changed later if infile contains an original name */
1178
1179
} else if (suff && ! force) {
1180
/* Avoid annoying messages with -r (see treat_dir()) */
1181
if (verbose || (!recursive && !quiet)) {
1182
/* Don't use WARN, as it affects exit status. */
1183
fprintf (stderr, "%s: %s already has %s suffix -- unchanged\n",
1184
program_name, ifname, suff);
1185
}
1186
return WARNING;
1187
} else {
1188
save_orig_name = 0;
1189
1190
#ifdef NO_MULTIPLE_DOTS
1191
suff = strrchr(ofname, '.');
1192
if (suff == NULL) {
1193
if (sizeof ofname <= strlen (ofname) + 1)
1194
goto name_too_long;
1195
strcat(ofname, ".");
1196
# ifdef MAX_EXT_CHARS
1197
if (strequ(z_suffix, "z")) {
1198
if (sizeof ofname <= strlen (ofname) + 2)
1199
goto name_too_long;
1200
strcat(ofname, "gz"); /* enough room */
1201
return OK;
1202
}
1203
/* On the Atari and some versions of MSDOS,
1204
* ENAMETOOLONG does not work correctly. So we
1205
* must truncate here.
1206
*/
1207
} else if (strlen(suff)-1 + z_len > MAX_SUFFIX) {
1208
suff[MAX_SUFFIX+1-z_len] = '\0';
1209
save_orig_name = 1;
1210
# endif
1211
}
1212
#endif /* NO_MULTIPLE_DOTS */
1213
if (sizeof ofname <= strlen (ofname) + z_len)
1214
goto name_too_long;
1215
strcat(ofname, z_suffix);
1216
1217
} /* decompress ? */
1218
return OK;
1219
1220
name_too_long:
1221
WARN ((stderr, "%s: %s: file name too long\n", program_name, ifname));
1222
return WARNING;
1223
}
1224
1225
1226
/* ========================================================================
1227
* Check the magic number of the input file and update ofname if an
1228
* original name was given and to_stdout is not set.
1229
* Return the compression method, -1 for error, -2 for warning.
1230
* Set inptr to the offset of the next byte to be processed.
1231
* Updates time_stamp if there is one and --no-time is not used.
1232
* This function may be called repeatedly for an input file consisting
1233
* of several contiguous gzip'ed members.
1234
* IN assertions: there is at least one remaining compressed member.
1235
* If the member is a zip file, it must be the only one.
1236
*/
1237
local int get_method(in)
1238
int in; /* input file descriptor */
1239
{
1240
uch flags; /* compression flags */
1241
char magic[2]; /* magic header */
1242
int imagic1; /* like magic[1], but can represent EOF */
1243
ulg stamp; /* time stamp */
1244
1245
/* If --force and --stdout, zcat == cat, so do not complain about
1246
* premature end of file: use try_byte instead of get_byte.
1247
*/
1248
if (force && to_stdout) {
1249
magic[0] = (char)try_byte();
1250
imagic1 = try_byte ();
1251
magic[1] = (char) imagic1;
1252
/* If try_byte returned EOF, magic[1] == (char) EOF. */
1253
} else {
1254
magic[0] = (char)get_byte();
1255
if (magic[0]) {
1256
magic[1] = (char)get_byte();
1257
imagic1 = 0; /* avoid lint warning */
1258
} else {
1259
imagic1 = try_byte ();
1260
magic[1] = (char) imagic1;
1261
}
1262
}
1263
method = -1; /* unknown yet */
1264
part_nb++; /* number of parts in gzip file */
1265
header_bytes = 0;
1266
last_member = RECORD_IO;
1267
/* assume multiple members in gzip file except for record oriented I/O */
1268
1269
if (memcmp(magic, GZIP_MAGIC, 2) == 0
1270
|| memcmp(magic, OLD_GZIP_MAGIC, 2) == 0) {
1271
1272
method = (int)get_byte();
1273
if (method != DEFLATED) {
1274
fprintf(stderr,
1275
"%s: %s: unknown method %d -- not supported\n",
1276
program_name, ifname, method);
1277
exit_code = ERROR;
1278
return -1;
1279
}
1280
work = unzip;
1281
flags = (uch)get_byte();
1282
1283
if ((flags & ENCRYPTED) != 0) {
1284
fprintf(stderr,
1285
"%s: %s is encrypted -- not supported\n",
1286
program_name, ifname);
1287
exit_code = ERROR;
1288
return -1;
1289
}
1290
if ((flags & CONTINUATION) != 0) {
1291
fprintf(stderr,
1292
"%s: %s is a multi-part gzip file -- not supported\n",
1293
program_name, ifname);
1294
exit_code = ERROR;
1295
if (force <= 1) return -1;
1296
}
1297
if ((flags & RESERVED) != 0) {
1298
fprintf(stderr,
1299
"%s: %s has flags 0x%x -- not supported\n",
1300
program_name, ifname, flags);
1301
exit_code = ERROR;
1302
if (force <= 1) return -1;
1303
}
1304
stamp = (ulg)get_byte();
1305
stamp |= ((ulg)get_byte()) << 8;
1306
stamp |= ((ulg)get_byte()) << 16;
1307
stamp |= ((ulg)get_byte()) << 24;
1308
if (stamp != 0 && !no_time)
1309
{
1310
time_stamp.tv_sec = stamp;
1311
time_stamp.tv_nsec = 0;
1312
}
1313
1314
(void)get_byte(); /* Ignore extra flags for the moment */
1315
(void)get_byte(); /* Ignore OS type for the moment */
1316
1317
if ((flags & CONTINUATION) != 0) {
1318
unsigned part = (unsigned)get_byte();
1319
part |= ((unsigned)get_byte())<<8;
1320
if (verbose) {
1321
fprintf(stderr,"%s: %s: part number %u\n",
1322
program_name, ifname, part);
1323
}
1324
}
1325
if ((flags & EXTRA_FIELD) != 0) {
1326
unsigned len = (unsigned)get_byte();
1327
len |= ((unsigned)get_byte())<<8;
1328
if (verbose) {
1329
fprintf(stderr,"%s: %s: extra field of %u bytes ignored\n",
1330
program_name, ifname, len);
1331
}
1332
while (len--) (void)get_byte();
1333
}
1334
1335
/* Get original file name if it was truncated */
1336
if ((flags & ORIG_NAME) != 0) {
1337
if (no_name || (to_stdout && !list) || part_nb > 1) {
1338
/* Discard the old name */
1339
char c; /* dummy used for NeXTstep 3.0 cc optimizer bug */
1340
do {c=get_byte();} while (c != 0);
1341
} else {
1342
/* Copy the base name. Keep a directory prefix intact. */
1343
char *p = gzip_base_name (ofname);
1344
char *base = p;
1345
for (;;) {
1346
*p = (char)get_char();
1347
if (*p++ == '\0') break;
1348
if (p >= ofname+sizeof(ofname)) {
1349
gzip_error ("corrupted input -- file name too large");
1350
}
1351
}
1352
p = gzip_base_name (base);
1353
memmove (base, p, strlen (p) + 1);
1354
/* If necessary, adapt the name to local OS conventions: */
1355
if (!list) {
1356
MAKE_LEGAL_NAME(base);
1357
if (base) list=0; /* avoid warning about unused variable */
1358
}
1359
} /* no_name || to_stdout */
1360
} /* ORIG_NAME */
1361
1362
/* Discard file comment if any */
1363
if ((flags & COMMENT) != 0) {
1364
while (get_char() != 0) /* null */ ;
1365
}
1366
if (part_nb == 1) {
1367
header_bytes = inptr + 2*sizeof(long); /* include crc and size */
1368
}
1369
1370
} else if (memcmp(magic, PKZIP_MAGIC, 2) == 0 && inptr == 2
1371
&& memcmp((char*)inbuf, PKZIP_MAGIC, 4) == 0) {
1372
/* To simplify the code, we support a zip file when alone only.
1373
* We are thus guaranteed that the entire local header fits in inbuf.
1374
*/
1375
inptr = 0;
1376
work = unzip;
1377
if (check_zipfile(in) != OK) return -1;
1378
/* check_zipfile may get ofname from the local header */
1379
last_member = 1;
1380
1381
} else if (memcmp(magic, PACK_MAGIC, 2) == 0) {
1382
work = unpack;
1383
method = PACKED;
1384
1385
} else if (memcmp(magic, LZW_MAGIC, 2) == 0) {
1386
work = unlzw;
1387
method = COMPRESSED;
1388
last_member = 1;
1389
1390
} else if (memcmp(magic, LZH_MAGIC, 2) == 0) {
1391
work = unlzh;
1392
method = LZHED;
1393
last_member = 1;
1394
1395
} else if (force && to_stdout && !list) { /* pass input unchanged */
1396
method = STORED;
1397
work = copy;
1398
inptr = 0;
1399
last_member = 1;
1400
}
1401
if (method >= 0) return method;
1402
1403
if (part_nb == 1) {
1404
fprintf (stderr, "\n%s: %s: not in gzip format\n",
1405
program_name, ifname);
1406
exit_code = ERROR;
1407
return -1;
1408
} else {
1409
if (magic[0] == 0)
1410
{
1411
int inbyte;
1412
for (inbyte = imagic1; inbyte == 0; inbyte = try_byte ())
1413
continue;
1414
if (inbyte == EOF)
1415
{
1416
if (verbose)
1417
WARN ((stderr, "\n%s: %s: decompression OK, trailing zero bytes ignored\n",
1418
program_name, ifname));
1419
return -3;
1420
}
1421
}
1422
1423
WARN((stderr, "\n%s: %s: decompression OK, trailing garbage ignored\n",
1424
program_name, ifname));
1425
return -2;
1426
}
1427
}
1428
1429
/* ========================================================================
1430
* Display the characteristics of the compressed file.
1431
* If the given method is < 0, display the accumulated totals.
1432
* IN assertions: time_stamp, header_bytes and ifile_size are initialized.
1433
*/
1434
local void do_list(ifd, method)
1435
int ifd; /* input file descriptor */
1436
int method; /* compression method */
1437
{
1438
ulg crc; /* original crc */
1439
static int first_time = 1;
1440
static char const *const methods[MAX_METHODS] = {
1441
"store", /* 0 */
1442
"compr", /* 1 */
1443
"pack ", /* 2 */
1444
"lzh ", /* 3 */
1445
"", "", "", "", /* 4 to 7 reserved */
1446
"defla"}; /* 8 */
1447
int positive_off_t_width = 1;
1448
off_t o;
1449
1450
for (o = OFF_T_MAX; 9 < o; o /= 10) {
1451
positive_off_t_width++;
1452
}
1453
1454
if (first_time && method >= 0) {
1455
first_time = 0;
1456
if (verbose) {
1457
printf("method crc date time ");
1458
}
1459
if (!quiet) {
1460
printf("%*.*s %*.*s ratio uncompressed_name\n",
1461
positive_off_t_width, positive_off_t_width, "compressed",
1462
positive_off_t_width, positive_off_t_width, "uncompressed");
1463
}
1464
} else if (method < 0) {
1465
if (total_in <= 0 || total_out <= 0) return;
1466
if (verbose) {
1467
printf(" ");
1468
}
1469
if (verbose || !quiet) {
1470
fprint_off(stdout, total_in, positive_off_t_width);
1471
printf(" ");
1472
fprint_off(stdout, total_out, positive_off_t_width);
1473
printf(" ");
1474
}
1475
display_ratio(total_out-(total_in-header_bytes), total_out, stdout);
1476
/* header_bytes is not meaningful but used to ensure the same
1477
* ratio if there is a single file.
1478
*/
1479
printf(" (totals)\n");
1480
return;
1481
}
1482
crc = (ulg)~0; /* unknown */
1483
bytes_out = -1L;
1484
bytes_in = ifile_size;
1485
1486
#if RECORD_IO == 0
1487
if (method == DEFLATED && !last_member) {
1488
/* Get the crc and uncompressed size for gzip'ed (not zip'ed) files.
1489
* If the lseek fails, we could use read() to get to the end, but
1490
* --list is used to get quick results.
1491
* Use "gunzip < foo.gz | wc -c" to get the uncompressed size if
1492
* you are not concerned about speed.
1493
*/
1494
bytes_in = lseek(ifd, (off_t)(-8), SEEK_END);
1495
if (bytes_in != -1L) {
1496
uch buf[8];
1497
bytes_in += 8L;
1498
if (read(ifd, (char*)buf, sizeof(buf)) != sizeof(buf)) {
1499
read_error();
1500
}
1501
crc = LG(buf);
1502
bytes_out = LG(buf+4);
1503
}
1504
}
1505
#endif /* RECORD_IO */
1506
if (verbose)
1507
{
1508
struct tm *tm = localtime (&time_stamp.tv_sec);
1509
printf ("%5s %08lx ", methods[method], crc);
1510
if (tm)
1511
printf ("%s%3d %02d:%02d ",
1512
("Jan\0Feb\0Mar\0Apr\0May\0Jun\0Jul\0Aug\0Sep\0Oct\0Nov\0Dec"
1513
+ 4 * tm->tm_mon),
1514
tm->tm_mday, tm->tm_hour, tm->tm_min);
1515
else
1516
printf ("??? ?? ??:?? ");
1517
}
1518
fprint_off(stdout, bytes_in, positive_off_t_width);
1519
printf(" ");
1520
fprint_off(stdout, bytes_out, positive_off_t_width);
1521
printf(" ");
1522
if (bytes_in == -1L) {
1523
total_in = -1L;
1524
bytes_in = bytes_out = header_bytes = 0;
1525
} else if (total_in >= 0) {
1526
total_in += bytes_in;
1527
}
1528
if (bytes_out == -1L) {
1529
total_out = -1L;
1530
bytes_in = bytes_out = header_bytes = 0;
1531
} else if (total_out >= 0) {
1532
total_out += bytes_out;
1533
}
1534
display_ratio(bytes_out-(bytes_in-header_bytes), bytes_out, stdout);
1535
printf(" %s\n", ofname);
1536
}
1537
1538
/* ========================================================================
1539
* Shorten the given name by one character, or replace a .tar extension
1540
* with .tgz. Truncate the last part of the name which is longer than
1541
* MIN_PART characters: 1234.678.012.gz -> 123.678.012.gz. If the name
1542
* has only parts shorter than MIN_PART truncate the longest part.
1543
* For decompression, just remove the last character of the name.
1544
*
1545
* IN assertion: for compression, the suffix of the given name is z_suffix.
1546
*/
1547
local void shorten_name(name)
1548
char *name;
1549
{
1550
int len; /* length of name without z_suffix */
1551
char *trunc = NULL; /* character to be truncated */
1552
int plen; /* current part length */
1553
int min_part = MIN_PART; /* current minimum part length */
1554
char *p;
1555
1556
len = strlen(name);
1557
if (decompress) {
1558
if (len <= 1)
1559
gzip_error ("name too short");
1560
name[len-1] = '\0';
1561
return;
1562
}
1563
p = get_suffix(name);
1564
if (! p)
1565
gzip_error ("can't recover suffix\n");
1566
*p = '\0';
1567
save_orig_name = 1;
1568
1569
/* compress 1234567890.tar to 1234567890.tgz */
1570
if (len > 4 && strequ(p-4, ".tar")) {
1571
strcpy(p-4, ".tgz");
1572
return;
1573
}
1574
/* Try keeping short extensions intact:
1575
* 1234.678.012.gz -> 123.678.012.gz
1576
*/
1577
do {
1578
p = strrchr(name, PATH_SEP);
1579
p = p ? p+1 : name;
1580
while (*p) {
1581
plen = strcspn(p, PART_SEP);
1582
p += plen;
1583
if (plen > min_part) trunc = p-1;
1584
if (*p) p++;
1585
}
1586
} while (trunc == NULL && --min_part != 0);
1587
1588
if (trunc != NULL) {
1589
do {
1590
trunc[0] = trunc[1];
1591
} while (*trunc++);
1592
trunc--;
1593
} else {
1594
trunc = strrchr(name, PART_SEP[0]);
1595
if (!trunc)
1596
gzip_error ("internal error in shorten_name");
1597
if (trunc[1] == '\0') trunc--; /* force truncation */
1598
}
1599
strcpy(trunc, z_suffix);
1600
}
1601
1602
/* ========================================================================
1603
* The compressed file already exists, so ask for confirmation.
1604
* Return ERROR if the file must be skipped.
1605
*/
1606
local int check_ofname()
1607
{
1608
/* Ask permission to overwrite the existing file */
1609
if (!force) {
1610
int ok = 0;
1611
fprintf (stderr, "%s: %s already exists;", program_name, ofname);
1612
if (foreground && isatty(fileno(stdin))) {
1613
fprintf(stderr, " do you wish to overwrite (y or n)? ");
1614
fflush(stderr);
1615
ok = yesno();
1616
}
1617
if (!ok) {
1618
fprintf(stderr, "\tnot overwritten\n");
1619
if (exit_code == OK) exit_code = WARNING;
1620
return ERROR;
1621
}
1622
}
1623
if (xunlink (ofname)) {
1624
progerror(ofname);
1625
return ERROR;
1626
}
1627
return OK;
1628
}
1629
1630
1631
/* ========================================================================
1632
* Copy modes, times, ownership from input file to output file.
1633
* IN assertion: to_stdout is false.
1634
*/
1635
local void copy_stat(ifstat)
1636
struct stat *ifstat;
1637
{
1638
mode_t mode = ifstat->st_mode & S_IRWXUGO;
1639
int r;
1640
1641
#ifndef NO_UTIME
1642
struct timespec timespec[2];
1643
timespec[0] = get_stat_atime (ifstat);
1644
timespec[1] = get_stat_mtime (ifstat);
1645
1646
if (decompress && 0 <= time_stamp.tv_nsec
1647
&& ! (timespec[1].tv_sec == time_stamp.tv_sec
1648
&& timespec[1].tv_nsec == time_stamp.tv_nsec))
1649
{
1650
timespec[1] = time_stamp;
1651
if (verbose > 1) {
1652
fprintf(stderr, "%s: time stamp restored\n", ofname);
1653
}
1654
}
1655
1656
if (gl_futimens (ofd, ofname, timespec) != 0)
1657
{
1658
int e = errno;
1659
WARN ((stderr, "%s: ", program_name));
1660
if (!quiet)
1661
{
1662
errno = e;
1663
perror (ofname);
1664
}
1665
}
1666
#endif
1667
1668
#ifndef NO_CHOWN
1669
/* Copy ownership */
1670
# if HAVE_FCHOWN
1671
ignore_value (fchown (ofd, ifstat->st_uid, ifstat->st_gid));
1672
# elif HAVE_CHOWN
1673
ignore_value (chown (ofname, ifstat->st_uid, ifstat->st_gid));
1674
# endif
1675
#endif
1676
1677
/* Copy the protection modes */
1678
#if HAVE_FCHMOD
1679
r = fchmod (ofd, mode);
1680
#else
1681
r = chmod (ofname, mode);
1682
#endif
1683
if (r != 0) {
1684
int e = errno;
1685
WARN ((stderr, "%s: ", program_name));
1686
if (!quiet) {
1687
errno = e;
1688
perror(ofname);
1689
}
1690
}
1691
}
1692
1693
#if ! NO_DIR
1694
1695
/* ========================================================================
1696
* Recurse through the given directory. This code is taken from ncompress.
1697
*/
1698
local void treat_dir (fd, dir)
1699
int fd;
1700
char *dir;
1701
{
1702
struct dirent *dp;
1703
DIR *dirp;
1704
char nbuf[MAX_PATH_LEN];
1705
int len;
1706
1707
dirp = fdopendir (fd);
1708
1709
if (dirp == NULL) {
1710
progerror(dir);
1711
close (fd);
1712
return ;
1713
}
1714
/*
1715
** WARNING: the following algorithm could occasionally cause
1716
** compress to produce error warnings of the form "<filename>.gz
1717
** already has .gz suffix - ignored". This occurs when the
1718
** .gz output file is inserted into the directory below
1719
** readdir's current pointer.
1720
** These warnings are harmless but annoying, so they are suppressed
1721
** with option -r (except when -v is on). An alternative
1722
** to allowing this would be to store the entire directory
1723
** list in memory, then compress the entries in the stored
1724
** list. Given the depth-first recursive algorithm used here,
1725
** this could use up a tremendous amount of memory. I don't
1726
** think it's worth it. -- Dave Mack
1727
** (An other alternative might be two passes to avoid depth-first.)
1728
*/
1729
1730
while ((errno = 0, dp = readdir(dirp)) != NULL) {
1731
1732
if (strequ(dp->d_name,".") || strequ(dp->d_name,"..")) {
1733
continue;
1734
}
1735
len = strlen(dir);
1736
if (len + _D_EXACT_NAMLEN (dp) + 1 < MAX_PATH_LEN - 1) {
1737
strcpy(nbuf,dir);
1738
if (len != 0 /* dir = "" means current dir on Amiga */
1739
#ifdef PATH_SEP2
1740
&& dir[len-1] != PATH_SEP2
1741
#endif
1742
#ifdef PATH_SEP3
1743
&& dir[len-1] != PATH_SEP3
1744
#endif
1745
) {
1746
nbuf[len++] = PATH_SEP;
1747
}
1748
strcpy(nbuf+len, dp->d_name);
1749
treat_file(nbuf);
1750
} else {
1751
fprintf(stderr,"%s: %s/%s: pathname too long\n",
1752
program_name, dir, dp->d_name);
1753
exit_code = ERROR;
1754
}
1755
}
1756
if (errno != 0)
1757
progerror(dir);
1758
if (CLOSEDIR(dirp) != 0)
1759
progerror(dir);
1760
}
1761
#endif /* ! NO_DIR */
1762
1763
/* Make sure signals get handled properly. */
1764
1765
static void
1766
install_signal_handlers ()
1767
{
1768
int nsigs = sizeof handled_sig / sizeof handled_sig[0];
1769
int i;
1770
1771
#if SA_NOCLDSTOP
1772
struct sigaction act;
1773
1774
sigemptyset (&caught_signals);
1775
for (i = 0; i < nsigs; i++)
1776
{
1777
sigaction (handled_sig[i], NULL, &act);
1778
if (act.sa_handler != SIG_IGN)
1779
sigaddset (&caught_signals, handled_sig[i]);
1780
}
1781
1782
act.sa_handler = abort_gzip_signal;
1783
act.sa_mask = caught_signals;
1784
act.sa_flags = 0;
1785
1786
for (i = 0; i < nsigs; i++)
1787
if (sigismember (&caught_signals, handled_sig[i]))
1788
{
1789
if (i == 0)
1790
foreground = 1;
1791
sigaction (handled_sig[i], &act, NULL);
1792
}
1793
#else
1794
for (i = 0; i < nsigs; i++)
1795
if (signal (handled_sig[i], SIG_IGN) != SIG_IGN)
1796
{
1797
if (i == 0)
1798
foreground = 1;
1799
signal (handled_sig[i], abort_gzip_signal);
1800
siginterrupt (handled_sig[i], 1);
1801
}
1802
#endif
1803
}
1804
1805
/* ========================================================================
1806
* Free all dynamically allocated variables and exit with the given code.
1807
*/
1808
local void do_exit(exitcode)
1809
int exitcode;
1810
{
1811
static int in_exit = 0;
1812
1813
if (in_exit) exit(exitcode);
1814
in_exit = 1;
1815
free(env);
1816
env = NULL;
1817
free(args);
1818
args = NULL;
1819
FREE(inbuf);
1820
FREE(outbuf);
1821
FREE(d_buf);
1822
FREE(window);
1823
#ifndef MAXSEG_64K
1824
FREE(tab_prefix);
1825
#else
1826
FREE(tab_prefix0);
1827
FREE(tab_prefix1);
1828
#endif
1829
exit(exitcode);
1830
}
1831
1832
/* ========================================================================
1833
* Close and unlink the output file.
1834
*/
1835
static void
1836
remove_output_file ()
1837
{
1838
int fd;
1839
sigset_t oldset;
1840
1841
sigprocmask (SIG_BLOCK, &caught_signals, &oldset);
1842
fd = remove_ofname_fd;
1843
if (0 <= fd)
1844
{
1845
remove_ofname_fd = -1;
1846
close (fd);
1847
xunlink (ofname);
1848
}
1849
sigprocmask (SIG_SETMASK, &oldset, NULL);
1850
}
1851
1852
/* ========================================================================
1853
* Error handler.
1854
*/
1855
void
1856
abort_gzip ()
1857
{
1858
remove_output_file ();
1859
do_exit(ERROR);
1860
}
1861
1862
/* ========================================================================
1863
* Signal handler.
1864
*/
1865
static RETSIGTYPE
1866
abort_gzip_signal (sig)
1867
int sig;
1868
{
1869
if (! SA_NOCLDSTOP)
1870
signal (sig, SIG_IGN);
1871
remove_output_file ();
1872
if (sig == exiting_signal)
1873
_exit (WARNING);
1874
signal (sig, SIG_DFL);
1875
raise (sig);
1876
}
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Version: 2.0.1