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75e1829f | 1 | /* minigzip.c -- simulate gzip using the zlib compression library |
1e5dce21 | 2 | * Copyright (C) 1995-2006, 2010, 2011, 2016 Jean-loup Gailly |
75e1829f | 3 | * For conditions of distribution and use, see copyright notice in zlib.h |
4 | */ | |
5 | ||
6 | /* | |
7 | * minigzip is a minimal implementation of the gzip utility. This is | |
8 | * only an example of using zlib and isn't meant to replace the | |
9 | * full-featured gzip. No attempt is made to deal with file systems | |
10 | * limiting names to 14 or 8+3 characters, etc... Error checking is | |
11 | * very limited. So use minigzip only for testing; use gzip for the | |
12 | * real thing. On MSDOS, use only on file names without extension | |
13 | * or in pipe mode. | |
14 | */ | |
15 | ||
16 | /* @(#) $Id$ */ | |
17 | ||
18 | #include "zlib.h" | |
19 | #include <stdio.h> | |
20 | ||
21 | #ifdef STDC | |
22 | # include <string.h> | |
23 | # include <stdlib.h> | |
24 | #endif | |
25 | ||
26 | #ifdef USE_MMAP | |
27 | # include <sys/types.h> | |
28 | # include <sys/mman.h> | |
29 | # include <sys/stat.h> | |
30 | #endif | |
31 | ||
32 | #if defined(MSDOS) || defined(OS2) || defined(WIN32) || defined(__CYGWIN__) | |
33 | # include <fcntl.h> | |
34 | # include <io.h> | |
35 | # ifdef UNDER_CE | |
36 | # include <stdlib.h> | |
37 | # endif | |
38 | # define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY) | |
39 | #else | |
40 | # define SET_BINARY_MODE(file) | |
41 | #endif | |
42 | ||
1e5dce21 | 43 | #if defined(_MSC_VER) && _MSC_VER < 1900 |
4b57a6ef | 44 | # define snprintf _snprintf |
45 | #endif | |
46 | ||
75e1829f | 47 | #ifdef VMS |
48 | # define unlink delete | |
49 | # define GZ_SUFFIX "-gz" | |
50 | #endif | |
51 | #ifdef RISCOS | |
52 | # define unlink remove | |
53 | # define GZ_SUFFIX "-gz" | |
54 | # define fileno(file) file->__file | |
55 | #endif | |
56 | #if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os | |
57 | # include <unix.h> /* for fileno */ | |
58 | #endif | |
59 | ||
60 | #if !defined(Z_HAVE_UNISTD_H) && !defined(_LARGEFILE64_SOURCE) | |
61 | #ifndef WIN32 /* unlink already in stdio.h for WIN32 */ | |
62 | extern int unlink OF((const char *)); | |
63 | #endif | |
64 | #endif | |
65 | ||
66 | #if defined(UNDER_CE) | |
67 | # include <windows.h> | |
68 | # define perror(s) pwinerror(s) | |
69 | ||
70 | /* Map the Windows error number in ERROR to a locale-dependent error | |
71 | message string and return a pointer to it. Typically, the values | |
72 | for ERROR come from GetLastError. | |
73 | ||
74 | The string pointed to shall not be modified by the application, | |
75 | but may be overwritten by a subsequent call to strwinerror | |
76 | ||
77 | The strwinerror function does not change the current setting | |
78 | of GetLastError. */ | |
79 | ||
80 | static char *strwinerror (error) | |
81 | DWORD error; | |
82 | { | |
83 | static char buf[1024]; | |
84 | ||
85 | wchar_t *msgbuf; | |
86 | DWORD lasterr = GetLastError(); | |
87 | DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | |
88 | | FORMAT_MESSAGE_ALLOCATE_BUFFER, | |
89 | NULL, | |
90 | error, | |
91 | 0, /* Default language */ | |
92 | (LPVOID)&msgbuf, | |
93 | 0, | |
94 | NULL); | |
95 | if (chars != 0) { | |
96 | /* If there is an \r\n appended, zap it. */ | |
97 | if (chars >= 2 | |
98 | && msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') { | |
99 | chars -= 2; | |
100 | msgbuf[chars] = 0; | |
101 | } | |
102 | ||
103 | if (chars > sizeof (buf) - 1) { | |
104 | chars = sizeof (buf) - 1; | |
105 | msgbuf[chars] = 0; | |
106 | } | |
107 | ||
108 | wcstombs(buf, msgbuf, chars + 1); | |
109 | LocalFree(msgbuf); | |
110 | } | |
111 | else { | |
112 | sprintf(buf, "unknown win32 error (%ld)", error); | |
113 | } | |
114 | ||
115 | SetLastError(lasterr); | |
116 | return buf; | |
117 | } | |
118 | ||
119 | static void pwinerror (s) | |
120 | const char *s; | |
121 | { | |
122 | if (s && *s) | |
123 | fprintf(stderr, "%s: %s\n", s, strwinerror(GetLastError ())); | |
124 | else | |
125 | fprintf(stderr, "%s\n", strwinerror(GetLastError ())); | |
126 | } | |
127 | ||
128 | #endif /* UNDER_CE */ | |
129 | ||
130 | #ifndef GZ_SUFFIX | |
131 | # define GZ_SUFFIX ".gz" | |
132 | #endif | |
133 | #define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1) | |
134 | ||
135 | #define BUFLEN 16384 | |
136 | #define MAX_NAME_LEN 1024 | |
137 | ||
138 | #ifdef MAXSEG_64K | |
139 | # define local static | |
140 | /* Needed for systems with limitation on stack size. */ | |
141 | #else | |
142 | # define local | |
143 | #endif | |
144 | ||
145 | #ifdef Z_SOLO | |
146 | /* for Z_SOLO, create simplified gz* functions using deflate and inflate */ | |
147 | ||
148 | #if defined(Z_HAVE_UNISTD_H) || defined(Z_LARGE) | |
149 | # include <unistd.h> /* for unlink() */ | |
150 | #endif | |
151 | ||
152 | void *myalloc OF((void *, unsigned, unsigned)); | |
153 | void myfree OF((void *, void *)); | |
154 | ||
155 | void *myalloc(q, n, m) | |
156 | void *q; | |
157 | unsigned n, m; | |
158 | { | |
1e5dce21 | 159 | (void)q; |
75e1829f | 160 | return calloc(n, m); |
161 | } | |
162 | ||
163 | void myfree(q, p) | |
164 | void *q, *p; | |
165 | { | |
1e5dce21 | 166 | (void)q; |
75e1829f | 167 | free(p); |
168 | } | |
169 | ||
170 | typedef struct gzFile_s { | |
171 | FILE *file; | |
172 | int write; | |
173 | int err; | |
174 | char *msg; | |
175 | z_stream strm; | |
176 | } *gzFile; | |
177 | ||
178 | gzFile gzopen OF((const char *, const char *)); | |
179 | gzFile gzdopen OF((int, const char *)); | |
180 | gzFile gz_open OF((const char *, int, const char *)); | |
181 | ||
182 | gzFile gzopen(path, mode) | |
183 | const char *path; | |
184 | const char *mode; | |
185 | { | |
186 | return gz_open(path, -1, mode); | |
187 | } | |
188 | ||
189 | gzFile gzdopen(fd, mode) | |
190 | int fd; | |
191 | const char *mode; | |
192 | { | |
193 | return gz_open(NULL, fd, mode); | |
194 | } | |
195 | ||
196 | gzFile gz_open(path, fd, mode) | |
197 | const char *path; | |
198 | int fd; | |
199 | const char *mode; | |
200 | { | |
201 | gzFile gz; | |
202 | int ret; | |
203 | ||
204 | gz = malloc(sizeof(struct gzFile_s)); | |
205 | if (gz == NULL) | |
206 | return NULL; | |
207 | gz->write = strchr(mode, 'w') != NULL; | |
208 | gz->strm.zalloc = myalloc; | |
209 | gz->strm.zfree = myfree; | |
210 | gz->strm.opaque = Z_NULL; | |
211 | if (gz->write) | |
212 | ret = deflateInit2(&(gz->strm), -1, 8, 15 + 16, 8, 0); | |
213 | else { | |
214 | gz->strm.next_in = 0; | |
215 | gz->strm.avail_in = Z_NULL; | |
216 | ret = inflateInit2(&(gz->strm), 15 + 16); | |
217 | } | |
218 | if (ret != Z_OK) { | |
219 | free(gz); | |
220 | return NULL; | |
221 | } | |
222 | gz->file = path == NULL ? fdopen(fd, gz->write ? "wb" : "rb") : | |
223 | fopen(path, gz->write ? "wb" : "rb"); | |
224 | if (gz->file == NULL) { | |
225 | gz->write ? deflateEnd(&(gz->strm)) : inflateEnd(&(gz->strm)); | |
226 | free(gz); | |
227 | return NULL; | |
228 | } | |
229 | gz->err = 0; | |
230 | gz->msg = ""; | |
231 | return gz; | |
232 | } | |
233 | ||
234 | int gzwrite OF((gzFile, const void *, unsigned)); | |
235 | ||
236 | int gzwrite(gz, buf, len) | |
237 | gzFile gz; | |
238 | const void *buf; | |
239 | unsigned len; | |
240 | { | |
241 | z_stream *strm; | |
242 | unsigned char out[BUFLEN]; | |
243 | ||
244 | if (gz == NULL || !gz->write) | |
245 | return 0; | |
246 | strm = &(gz->strm); | |
247 | strm->next_in = (void *)buf; | |
248 | strm->avail_in = len; | |
249 | do { | |
250 | strm->next_out = out; | |
251 | strm->avail_out = BUFLEN; | |
252 | (void)deflate(strm, Z_NO_FLUSH); | |
253 | fwrite(out, 1, BUFLEN - strm->avail_out, gz->file); | |
254 | } while (strm->avail_out == 0); | |
255 | return len; | |
256 | } | |
257 | ||
258 | int gzread OF((gzFile, void *, unsigned)); | |
259 | ||
260 | int gzread(gz, buf, len) | |
261 | gzFile gz; | |
262 | void *buf; | |
263 | unsigned len; | |
264 | { | |
265 | int ret; | |
266 | unsigned got; | |
267 | unsigned char in[1]; | |
268 | z_stream *strm; | |
269 | ||
270 | if (gz == NULL || gz->write) | |
271 | return 0; | |
272 | if (gz->err) | |
273 | return 0; | |
274 | strm = &(gz->strm); | |
275 | strm->next_out = (void *)buf; | |
276 | strm->avail_out = len; | |
277 | do { | |
278 | got = fread(in, 1, 1, gz->file); | |
279 | if (got == 0) | |
280 | break; | |
281 | strm->next_in = in; | |
282 | strm->avail_in = 1; | |
283 | ret = inflate(strm, Z_NO_FLUSH); | |
284 | if (ret == Z_DATA_ERROR) { | |
285 | gz->err = Z_DATA_ERROR; | |
286 | gz->msg = strm->msg; | |
287 | return 0; | |
288 | } | |
289 | if (ret == Z_STREAM_END) | |
290 | inflateReset(strm); | |
291 | } while (strm->avail_out); | |
292 | return len - strm->avail_out; | |
293 | } | |
294 | ||
295 | int gzclose OF((gzFile)); | |
296 | ||
297 | int gzclose(gz) | |
298 | gzFile gz; | |
299 | { | |
300 | z_stream *strm; | |
301 | unsigned char out[BUFLEN]; | |
302 | ||
303 | if (gz == NULL) | |
304 | return Z_STREAM_ERROR; | |
305 | strm = &(gz->strm); | |
306 | if (gz->write) { | |
307 | strm->next_in = Z_NULL; | |
308 | strm->avail_in = 0; | |
309 | do { | |
310 | strm->next_out = out; | |
311 | strm->avail_out = BUFLEN; | |
312 | (void)deflate(strm, Z_FINISH); | |
313 | fwrite(out, 1, BUFLEN - strm->avail_out, gz->file); | |
314 | } while (strm->avail_out == 0); | |
315 | deflateEnd(strm); | |
316 | } | |
317 | else | |
318 | inflateEnd(strm); | |
319 | fclose(gz->file); | |
320 | free(gz); | |
321 | return Z_OK; | |
322 | } | |
323 | ||
324 | const char *gzerror OF((gzFile, int *)); | |
325 | ||
326 | const char *gzerror(gz, err) | |
327 | gzFile gz; | |
328 | int *err; | |
329 | { | |
330 | *err = gz->err; | |
331 | return gz->msg; | |
332 | } | |
333 | ||
334 | #endif | |
335 | ||
1e5dce21 | 336 | static char *prog; |
75e1829f | 337 | |
338 | void error OF((const char *msg)); | |
339 | void gz_compress OF((FILE *in, gzFile out)); | |
340 | #ifdef USE_MMAP | |
341 | int gz_compress_mmap OF((FILE *in, gzFile out)); | |
342 | #endif | |
343 | void gz_uncompress OF((gzFile in, FILE *out)); | |
344 | void file_compress OF((char *file, char *mode)); | |
345 | void file_uncompress OF((char *file)); | |
346 | int main OF((int argc, char *argv[])); | |
347 | ||
348 | /* =========================================================================== | |
349 | * Display error message and exit | |
350 | */ | |
351 | void error(msg) | |
352 | const char *msg; | |
353 | { | |
354 | fprintf(stderr, "%s: %s\n", prog, msg); | |
355 | exit(1); | |
356 | } | |
357 | ||
358 | /* =========================================================================== | |
359 | * Compress input to output then close both files. | |
360 | */ | |
361 | ||
362 | void gz_compress(in, out) | |
363 | FILE *in; | |
364 | gzFile out; | |
365 | { | |
366 | local char buf[BUFLEN]; | |
367 | int len; | |
368 | int err; | |
369 | ||
370 | #ifdef USE_MMAP | |
371 | /* Try first compressing with mmap. If mmap fails (minigzip used in a | |
372 | * pipe), use the normal fread loop. | |
373 | */ | |
374 | if (gz_compress_mmap(in, out) == Z_OK) return; | |
375 | #endif | |
376 | for (;;) { | |
377 | len = (int)fread(buf, 1, sizeof(buf), in); | |
378 | if (ferror(in)) { | |
379 | perror("fread"); | |
380 | exit(1); | |
381 | } | |
382 | if (len == 0) break; | |
383 | ||
384 | if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err)); | |
385 | } | |
386 | fclose(in); | |
387 | if (gzclose(out) != Z_OK) error("failed gzclose"); | |
388 | } | |
389 | ||
390 | #ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */ | |
391 | ||
392 | /* Try compressing the input file at once using mmap. Return Z_OK if | |
393 | * if success, Z_ERRNO otherwise. | |
394 | */ | |
395 | int gz_compress_mmap(in, out) | |
396 | FILE *in; | |
397 | gzFile out; | |
398 | { | |
399 | int len; | |
400 | int err; | |
401 | int ifd = fileno(in); | |
402 | caddr_t buf; /* mmap'ed buffer for the entire input file */ | |
403 | off_t buf_len; /* length of the input file */ | |
404 | struct stat sb; | |
405 | ||
406 | /* Determine the size of the file, needed for mmap: */ | |
407 | if (fstat(ifd, &sb) < 0) return Z_ERRNO; | |
408 | buf_len = sb.st_size; | |
409 | if (buf_len <= 0) return Z_ERRNO; | |
410 | ||
411 | /* Now do the actual mmap: */ | |
412 | buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0); | |
413 | if (buf == (caddr_t)(-1)) return Z_ERRNO; | |
414 | ||
415 | /* Compress the whole file at once: */ | |
416 | len = gzwrite(out, (char *)buf, (unsigned)buf_len); | |
417 | ||
418 | if (len != (int)buf_len) error(gzerror(out, &err)); | |
419 | ||
420 | munmap(buf, buf_len); | |
421 | fclose(in); | |
422 | if (gzclose(out) != Z_OK) error("failed gzclose"); | |
423 | return Z_OK; | |
424 | } | |
425 | #endif /* USE_MMAP */ | |
426 | ||
427 | /* =========================================================================== | |
428 | * Uncompress input to output then close both files. | |
429 | */ | |
430 | void gz_uncompress(in, out) | |
431 | gzFile in; | |
432 | FILE *out; | |
433 | { | |
434 | local char buf[BUFLEN]; | |
435 | int len; | |
436 | int err; | |
437 | ||
438 | for (;;) { | |
439 | len = gzread(in, buf, sizeof(buf)); | |
440 | if (len < 0) error (gzerror(in, &err)); | |
441 | if (len == 0) break; | |
442 | ||
443 | if ((int)fwrite(buf, 1, (unsigned)len, out) != len) { | |
444 | error("failed fwrite"); | |
445 | } | |
446 | } | |
447 | if (fclose(out)) error("failed fclose"); | |
448 | ||
449 | if (gzclose(in) != Z_OK) error("failed gzclose"); | |
450 | } | |
451 | ||
452 | ||
453 | /* =========================================================================== | |
454 | * Compress the given file: create a corresponding .gz file and remove the | |
455 | * original. | |
456 | */ | |
457 | void file_compress(file, mode) | |
458 | char *file; | |
459 | char *mode; | |
460 | { | |
461 | local char outfile[MAX_NAME_LEN]; | |
462 | FILE *in; | |
463 | gzFile out; | |
464 | ||
465 | if (strlen(file) + strlen(GZ_SUFFIX) >= sizeof(outfile)) { | |
466 | fprintf(stderr, "%s: filename too long\n", prog); | |
467 | exit(1); | |
468 | } | |
469 | ||
4b57a6ef | 470 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) |
471 | snprintf(outfile, sizeof(outfile), "%s%s", file, GZ_SUFFIX); | |
472 | #else | |
75e1829f | 473 | strcpy(outfile, file); |
474 | strcat(outfile, GZ_SUFFIX); | |
4b57a6ef | 475 | #endif |
75e1829f | 476 | |
477 | in = fopen(file, "rb"); | |
478 | if (in == NULL) { | |
479 | perror(file); | |
480 | exit(1); | |
481 | } | |
482 | out = gzopen(outfile, mode); | |
483 | if (out == NULL) { | |
484 | fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile); | |
485 | exit(1); | |
486 | } | |
487 | gz_compress(in, out); | |
488 | ||
489 | unlink(file); | |
490 | } | |
491 | ||
492 | ||
493 | /* =========================================================================== | |
494 | * Uncompress the given file and remove the original. | |
495 | */ | |
496 | void file_uncompress(file) | |
497 | char *file; | |
498 | { | |
499 | local char buf[MAX_NAME_LEN]; | |
500 | char *infile, *outfile; | |
501 | FILE *out; | |
502 | gzFile in; | |
1e5dce21 | 503 | unsigned len = strlen(file); |
75e1829f | 504 | |
505 | if (len + strlen(GZ_SUFFIX) >= sizeof(buf)) { | |
506 | fprintf(stderr, "%s: filename too long\n", prog); | |
507 | exit(1); | |
508 | } | |
509 | ||
4b57a6ef | 510 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) |
511 | snprintf(buf, sizeof(buf), "%s", file); | |
512 | #else | |
75e1829f | 513 | strcpy(buf, file); |
4b57a6ef | 514 | #endif |
75e1829f | 515 | |
516 | if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) { | |
517 | infile = file; | |
518 | outfile = buf; | |
519 | outfile[len-3] = '\0'; | |
520 | } else { | |
521 | outfile = file; | |
522 | infile = buf; | |
4b57a6ef | 523 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) |
524 | snprintf(buf + len, sizeof(buf) - len, "%s", GZ_SUFFIX); | |
525 | #else | |
75e1829f | 526 | strcat(infile, GZ_SUFFIX); |
4b57a6ef | 527 | #endif |
75e1829f | 528 | } |
529 | in = gzopen(infile, "rb"); | |
530 | if (in == NULL) { | |
531 | fprintf(stderr, "%s: can't gzopen %s\n", prog, infile); | |
532 | exit(1); | |
533 | } | |
534 | out = fopen(outfile, "wb"); | |
535 | if (out == NULL) { | |
536 | perror(file); | |
537 | exit(1); | |
538 | } | |
539 | ||
540 | gz_uncompress(in, out); | |
541 | ||
542 | unlink(infile); | |
543 | } | |
544 | ||
545 | ||
546 | /* =========================================================================== | |
547 | * Usage: minigzip [-c] [-d] [-f] [-h] [-r] [-1 to -9] [files...] | |
548 | * -c : write to standard output | |
549 | * -d : decompress | |
550 | * -f : compress with Z_FILTERED | |
551 | * -h : compress with Z_HUFFMAN_ONLY | |
552 | * -r : compress with Z_RLE | |
553 | * -1 to -9 : compression level | |
554 | */ | |
555 | ||
556 | int main(argc, argv) | |
557 | int argc; | |
558 | char *argv[]; | |
559 | { | |
560 | int copyout = 0; | |
561 | int uncompr = 0; | |
562 | gzFile file; | |
563 | char *bname, outmode[20]; | |
564 | ||
4b57a6ef | 565 | #if !defined(NO_snprintf) && !defined(NO_vsnprintf) |
566 | snprintf(outmode, sizeof(outmode), "%s", "wb6 "); | |
567 | #else | |
75e1829f | 568 | strcpy(outmode, "wb6 "); |
4b57a6ef | 569 | #endif |
75e1829f | 570 | |
571 | prog = argv[0]; | |
572 | bname = strrchr(argv[0], '/'); | |
573 | if (bname) | |
574 | bname++; | |
575 | else | |
576 | bname = argv[0]; | |
577 | argc--, argv++; | |
578 | ||
579 | if (!strcmp(bname, "gunzip")) | |
580 | uncompr = 1; | |
581 | else if (!strcmp(bname, "zcat")) | |
582 | copyout = uncompr = 1; | |
583 | ||
584 | while (argc > 0) { | |
585 | if (strcmp(*argv, "-c") == 0) | |
586 | copyout = 1; | |
587 | else if (strcmp(*argv, "-d") == 0) | |
588 | uncompr = 1; | |
589 | else if (strcmp(*argv, "-f") == 0) | |
590 | outmode[3] = 'f'; | |
591 | else if (strcmp(*argv, "-h") == 0) | |
592 | outmode[3] = 'h'; | |
593 | else if (strcmp(*argv, "-r") == 0) | |
594 | outmode[3] = 'R'; | |
595 | else if ((*argv)[0] == '-' && (*argv)[1] >= '1' && (*argv)[1] <= '9' && | |
596 | (*argv)[2] == 0) | |
597 | outmode[2] = (*argv)[1]; | |
598 | else | |
599 | break; | |
600 | argc--, argv++; | |
601 | } | |
602 | if (outmode[3] == ' ') | |
603 | outmode[3] = 0; | |
604 | if (argc == 0) { | |
605 | SET_BINARY_MODE(stdin); | |
606 | SET_BINARY_MODE(stdout); | |
607 | if (uncompr) { | |
608 | file = gzdopen(fileno(stdin), "rb"); | |
609 | if (file == NULL) error("can't gzdopen stdin"); | |
610 | gz_uncompress(file, stdout); | |
611 | } else { | |
612 | file = gzdopen(fileno(stdout), outmode); | |
613 | if (file == NULL) error("can't gzdopen stdout"); | |
614 | gz_compress(stdin, file); | |
615 | } | |
616 | } else { | |
617 | if (copyout) { | |
618 | SET_BINARY_MODE(stdout); | |
619 | } | |
620 | do { | |
621 | if (uncompr) { | |
622 | if (copyout) { | |
623 | file = gzopen(*argv, "rb"); | |
624 | if (file == NULL) | |
625 | fprintf(stderr, "%s: can't gzopen %s\n", prog, *argv); | |
626 | else | |
627 | gz_uncompress(file, stdout); | |
628 | } else { | |
629 | file_uncompress(*argv); | |
630 | } | |
631 | } else { | |
632 | if (copyout) { | |
633 | FILE * in = fopen(*argv, "rb"); | |
634 | ||
635 | if (in == NULL) { | |
636 | perror(*argv); | |
637 | } else { | |
638 | file = gzdopen(fileno(stdout), outmode); | |
639 | if (file == NULL) error("can't gzdopen stdout"); | |
640 | ||
641 | gz_compress(in, file); | |
642 | } | |
643 | ||
644 | } else { | |
645 | file_compress(*argv, outmode); | |
646 | } | |
647 | } | |
648 | } while (argv++, --argc); | |
649 | } | |
650 | return 0; | |
651 | } |