Got Mirror

Blob

Date:: Tue Sep 21 20:34:22 2021 UTC
Message:: portable: initial Linux compilation This commit modifies the GoT main branch to be able to compile it under linux.
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1 /*
2  * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 
18 #include <errno.h>
19 #include <stdio.h>
20 #include <stdlib.h>
21 #include <string.h>
22 #include <sha1.h>
23 #include <unistd.h>
24 #include <zlib.h>
25 #include <time.h>
26 
27 #include "got_error.h"
28 #include "got_object.h"
29 #include "got_path.h"
30 
31 #include "got_lib_inflate.h"
32 
33 #ifndef MIN
34 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
35 #endif
36 
37 const struct got_error *
38 got_inflate_init(struct got_inflate_buf *zb, uint8_t *outbuf, size_t bufsize,
39     struct got_inflate_checksum *csum)
40 {
41 	const struct got_error *err = NULL;
42 	int zerr;
43 
44 	memset(&zb->z, 0, sizeof(zb->z));
45 
46 	zb->z.zalloc = Z_NULL;
47 	zb->z.zfree = Z_NULL;
48 	zerr = inflateInit(&zb->z);
49 	if (zerr != Z_OK) {
50 		if  (zerr == Z_ERRNO)
51 			return got_error_from_errno("inflateInit");
52 		if  (zerr == Z_MEM_ERROR) {
53 			errno = ENOMEM;
54 			return got_error_from_errno("inflateInit");
55 		}
56 		return got_error(GOT_ERR_DECOMPRESSION);
57 	}
58 
59 	zb->inlen = zb->outlen = bufsize;
60 
61 	zb->inbuf = calloc(1, zb->inlen);
62 	if (zb->inbuf == NULL) {
63 		err = got_error_from_errno("calloc");
64 		goto done;
65 	}
66 
67 	zb->flags = 0;
68 	if (outbuf == NULL) {
69 		zb->outbuf = calloc(1, zb->outlen);
70 		if (zb->outbuf == NULL) {
71 			err = got_error_from_errno("calloc");
72 			goto done;
73 		}
74 		zb->flags |= GOT_INFLATE_F_OWN_OUTBUF;
75 	} else
76 		zb->outbuf = outbuf;
77 
78 	zb->csum = csum;
79 done:
80 	if (err)
81 		got_inflate_end(zb);
82 	return err;
83 }
84 
85 static void
86 csum_input(struct got_inflate_checksum *csum, const char *buf, size_t len)
87 {
88 	if (csum->input_crc)
89 		*csum->input_crc = crc32(*csum->input_crc, buf, len);
90 
91 	if (csum->input_sha1)
92 		SHA1Update(csum->input_sha1, buf, len);
93 }
94 
95 static void
96 csum_output(struct got_inflate_checksum *csum, const char *buf, size_t len)
97 {
98 	if (csum->output_crc)
99 		*csum->output_crc = crc32(*csum->output_crc, buf, len);
100 
101 	if (csum->output_sha1)
102 		SHA1Update(csum->output_sha1, buf, len);
103 }
104 
105 const struct got_error *
106 got_inflate_read(struct got_inflate_buf *zb, FILE *f, size_t *outlenp,
107     size_t *consumed)
108 {
109 	size_t last_total_out = zb->z.total_out;
110 	size_t last_total_in = zb->z.total_in;
111 	z_stream *z = &zb->z;
112 	int ret = Z_ERRNO;
113 
114 	z->next_out = zb->outbuf;
115 	z->avail_out = zb->outlen;
116 
117 	*outlenp = 0;
118 	if (consumed)
119 		*consumed = 0;
120 	do {
121 		char *csum_in = NULL, *csum_out = NULL;
122 		size_t csum_avail_in = 0, csum_avail_out = 0;
123 
124 		if (z->avail_in == 0) {
125 			size_t n = fread(zb->inbuf, 1, zb->inlen, f);
126 			if (n == 0) {
127 				if (ferror(f))
128 					return got_ferror(f, GOT_ERR_IO);
129 				/* EOF */
130 				ret = Z_STREAM_END;
131 				break;
132 			}
133 			z->next_in = zb->inbuf;
134 			z->avail_in = n;
135 		}
136 		if (zb->csum) {
137 			csum_in = z->next_in;
138 			csum_avail_in = z->avail_in;
139 			csum_out = z->next_out;
140 			csum_avail_out = z->avail_out;
141 		}
142 		ret = inflate(z, Z_SYNC_FLUSH);
143 		if (zb->csum) {
144 			csum_input(zb->csum, csum_in,
145 			    csum_avail_in - z->avail_in);
146 			csum_output(zb->csum, csum_out,
147 			    csum_avail_out - z->avail_out);
148 		}
149 	} while (ret == Z_OK && z->avail_out > 0);
150 
151 	if (ret == Z_OK || ret == Z_BUF_ERROR) {
152 		zb->flags |= GOT_INFLATE_F_HAVE_MORE;
153 	} else {
154 		if (ret != Z_STREAM_END)
155 			return got_error(GOT_ERR_DECOMPRESSION);
156 		zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
157 	}
158 
159 	*outlenp = z->total_out - last_total_out;
160 	if (consumed)
161 		*consumed += z->total_in - last_total_in;
162 	return NULL;
163 }
164 
165 const struct got_error *
166 got_inflate_read_fd(struct got_inflate_buf *zb, int fd, size_t *outlenp,
167     size_t *consumed)
168 {
169 	size_t last_total_out = zb->z.total_out;
170 	size_t last_total_in = zb->z.total_in;
171 	z_stream *z = &zb->z;
172 	int ret = Z_ERRNO;
173 
174 	z->next_out = zb->outbuf;
175 	z->avail_out = zb->outlen;
176 
177 	*outlenp = 0;
178 	if (consumed)
179 		*consumed = 0;
180 	do {
181 		char *csum_in = NULL, *csum_out = NULL;
182 		size_t csum_avail_in = 0, csum_avail_out = 0;
183 
184 		if (z->avail_in == 0) {
185 			ssize_t n = read(fd, zb->inbuf, zb->inlen);
186 			if (n < 0)
187 				return got_error_from_errno("read");
188 			else if (n == 0) {
189 				/* EOF */
190 				ret = Z_STREAM_END;
191 				break;
192 			}
193 			z->next_in = zb->inbuf;
194 			z->avail_in = n;
195 		}
196 		if (zb->csum) {
197 			csum_in = z->next_in;
198 			csum_avail_in = z->avail_in;
199 			csum_out = z->next_out;
200 			csum_avail_out = z->avail_out;
201 		}
202 		ret = inflate(z, Z_SYNC_FLUSH);
203 		if (zb->csum) {
204 			csum_input(zb->csum, csum_in,
205 			    csum_avail_in - z->avail_in);
206 			csum_output(zb->csum, csum_out,
207 			    csum_avail_out - z->avail_out);
208 		}
209 	} while (ret == Z_OK && z->avail_out > 0);
210 
211 	if (ret == Z_OK || ret == Z_BUF_ERROR) {
212 		zb->flags |= GOT_INFLATE_F_HAVE_MORE;
213 	} else {
214 		if (ret != Z_STREAM_END)
215 			return got_error(GOT_ERR_DECOMPRESSION);
216 		zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
217 	}
218 
219 	*outlenp = z->total_out - last_total_out;
220 	if (consumed)
221 		*consumed += z->total_in - last_total_in;
222 	return NULL;
223 }
224 
225 const struct got_error *
226 got_inflate_read_mmap(struct got_inflate_buf *zb, uint8_t *map, size_t offset,
227     size_t len, size_t *outlenp, size_t *consumed)
228 {
229 	size_t last_total_out = zb->z.total_out;
230 	z_stream *z = &zb->z;
231 	int ret = Z_ERRNO;
232 
233 	z->next_out = zb->outbuf;
234 	z->avail_out = zb->outlen;
235 
236 	*outlenp = 0;
237 	*consumed = 0;
238 
239 	do {
240 		char *csum_in = NULL, *csum_out = NULL;
241 		size_t csum_avail_in = 0, csum_avail_out = 0;
242 		size_t last_total_in = zb->z.total_in;
243 
244 		if (z->avail_in == 0) {
245 			if (len == 0) {
246 				/* EOF */
247 				ret = Z_STREAM_END;
248 				break;
249 			}
250 			z->next_in = map + offset + *consumed;
251 			z->avail_in = len - *consumed;
252 		}
253 		if (zb->csum) {
254 			csum_in = z->next_in;
255 			csum_avail_in = z->avail_in;
256 			csum_out = z->next_out;
257 			csum_avail_out = z->avail_out;
258 		}
259 		ret = inflate(z, Z_SYNC_FLUSH);
260 		if (zb->csum) {
261 			csum_input(zb->csum, csum_in,
262 			    csum_avail_in - z->avail_in);
263 			csum_output(zb->csum, csum_out,
264 			    csum_avail_out - z->avail_out);
265 		}
266 		*consumed += z->total_in - last_total_in;
267 	} while (ret == Z_OK && z->avail_out > 0);
268 
269 	if (ret == Z_OK || ret == Z_BUF_ERROR) {
270 		zb->flags |= GOT_INFLATE_F_HAVE_MORE;
271 	} else {
272 		if (ret != Z_STREAM_END)
273 			return got_error(GOT_ERR_DECOMPRESSION);
274 		zb->flags &= ~GOT_INFLATE_F_HAVE_MORE;
275 	}
276 
277 	*outlenp = z->total_out - last_total_out;
278 	return NULL;
279 }
280 
281 void
282 got_inflate_end(struct got_inflate_buf *zb)
283 {
284 	free(zb->inbuf);
285 	if (zb->flags & GOT_INFLATE_F_OWN_OUTBUF)
286 		free(zb->outbuf);
287 	inflateEnd(&zb->z);
288 }
289 
290 const struct got_error *
291 got_inflate_to_mem(uint8_t **outbuf, size_t *outlen,
292     size_t *consumed_total, struct got_inflate_checksum *csum, FILE *f)
293 {
294 	const struct got_error *err;
295 	size_t avail, consumed;
296 	struct got_inflate_buf zb;
297 	void *newbuf;
298 	int nbuf = 1;
299 
300 	if (outbuf) {
301 		*outbuf = malloc(GOT_INFLATE_BUFSIZE);
302 		if (*outbuf == NULL)
303 			return got_error_from_errno("malloc");
304 		err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE, csum);
305 	} else
306 		err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE, csum);
307 	if (err)
308 		return err;
309 
310 	*outlen = 0;
311 	if (consumed_total)
312 		*consumed_total = 0;
313 
314 	do {
315 		err = got_inflate_read(&zb, f, &avail, &consumed);
316 		if (err)
317 			goto done;
318 		*outlen += avail;
319 		if (consumed_total)
320 			*consumed_total += consumed;
321 		if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
322 			if (outbuf == NULL)
323 				continue;
324 			zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
325 			newbuf = reallocarray(*outbuf, ++nbuf,
326 			    GOT_INFLATE_BUFSIZE);
327 			if (newbuf == NULL) {
328 				err = got_error_from_errno("reallocarray");
329 				free(*outbuf);
330 				*outbuf = NULL;
331 				*outlen = 0;
332 				goto done;
333 			}
334 			*outbuf = newbuf;
335 			zb.outbuf = newbuf + *outlen;
336 		}
337 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
338 
339 done:
340 	got_inflate_end(&zb);
341 	return err;
342 }
343 
344 const struct got_error *
345 got_inflate_to_mem_fd(uint8_t **outbuf, size_t *outlen,
346     size_t *consumed_total, struct got_inflate_checksum *csum, 
347     size_t expected_size, int infd)
348 {
349 	const struct got_error *err;
350 	size_t avail, consumed;
351 	struct got_inflate_buf zb;
352 	void *newbuf;
353 	int nbuf = 1;
354 	size_t bufsize = GOT_INFLATE_BUFSIZE;
355 
356 	/* Optimize buffer size in case short reads should suffice. */
357 	if (expected_size > 0 && expected_size < bufsize)
358 		bufsize = expected_size;
359 
360 	if (outbuf) {
361 		*outbuf = malloc(bufsize);
362 		if (*outbuf == NULL)
363 			return got_error_from_errno("malloc");
364 		err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE, csum);
365 	} else
366 		err = got_inflate_init(&zb, NULL, bufsize, csum);
367 	if (err)
368 		goto done;
369 
370 	*outlen = 0;
371 	if (consumed_total)
372 		*consumed_total = 0;
373 
374 	do {
375 		err = got_inflate_read_fd(&zb, infd, &avail, &consumed);
376 		if (err)
377 			goto done;
378 		*outlen += avail;
379 		if (consumed_total)
380 			*consumed_total += consumed;
381 		if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
382 			if (outbuf == NULL)
383 				continue;
384 			zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
385 			newbuf = reallocarray(*outbuf, ++nbuf,
386 			    GOT_INFLATE_BUFSIZE);
387 			if (newbuf == NULL) {
388 				err = got_error_from_errno("reallocarray");
389 				free(*outbuf);
390 				*outbuf = NULL;
391 				*outlen = 0;
392 				goto done;
393 			}
394 			*outbuf = newbuf;
395 			zb.outbuf = newbuf + *outlen;
396 		}
397 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
398 
399 done:
400 	got_inflate_end(&zb);
401 	return err;
402 }
403 
404 const struct got_error *
405 got_inflate_to_mem_mmap(uint8_t **outbuf, size_t *outlen,
406     size_t *consumed_total, struct got_inflate_checksum *csum, uint8_t *map,
407     size_t offset, size_t len)
408 {
409 	const struct got_error *err;
410 	size_t avail, consumed;
411 	struct got_inflate_buf zb;
412 	void *newbuf;
413 	int nbuf = 1;
414 
415 	if (outbuf) {
416 		*outbuf = malloc(GOT_INFLATE_BUFSIZE);
417 		if (*outbuf == NULL)
418 			return got_error_from_errno("malloc");
419 		err = got_inflate_init(&zb, *outbuf, GOT_INFLATE_BUFSIZE, csum);
420 		if (err) {
421 			free(*outbuf);
422 			*outbuf = NULL;
423 			return err;
424 		}
425 	} else {
426 		err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE, csum);
427 	}
428 
429 	*outlen = 0;
430 	if (consumed_total)
431 		*consumed_total = 0;
432 	do {
433 		err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
434 		    &consumed);
435 		if (err)
436 			goto done;
437 		offset += consumed;
438 		if (consumed_total)
439 			*consumed_total += consumed;
440 		len -= consumed;
441 		*outlen += avail;
442 		if (len == 0)
443 			break;
444 		if (zb.flags & GOT_INFLATE_F_HAVE_MORE) {
445 			if (outbuf == NULL)
446 				continue;
447 			newbuf = reallocarray(*outbuf, ++nbuf,
448 			    GOT_INFLATE_BUFSIZE);
449 			if (newbuf == NULL) {
450 				err = got_error_from_errno("reallocarray");
451 				free(*outbuf);
452 				*outbuf = NULL;
453 				*outlen = 0;
454 				goto done;
455 			}
456 			*outbuf = newbuf;
457 			zb.outbuf = newbuf + *outlen;
458 			zb.outlen = (nbuf * GOT_INFLATE_BUFSIZE) - *outlen;
459 		}
460 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
461 done:
462 	got_inflate_end(&zb);
463 	return err;
464 }
465 
466 const struct got_error *
467 got_inflate_to_fd(size_t *outlen, FILE *infile,
468     struct got_inflate_checksum *csum, int outfd)
469 {
470 	const struct got_error *err = NULL;
471 	size_t avail;
472 	struct got_inflate_buf zb;
473 
474 	err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE, csum);
475 	if (err)
476 		goto done;
477 
478 	*outlen = 0;
479 
480 	do {
481 		err = got_inflate_read(&zb, infile, &avail, NULL);
482 		if (err)
483 			goto done;
484 		if (avail > 0) {
485 			ssize_t n;
486 			n = write(outfd, zb.outbuf, avail);
487 			if (n != avail) {
488 				err = got_error_from_errno("write");
489 				goto done;
490 			}
491 			*outlen += avail;
492 		}
493 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
494 
495 done:
496 	if (err == NULL) {
497 		if (lseek(outfd, SEEK_SET, 0) == -1)
498 			err = got_error_from_errno("lseek");
499 	}
500 	got_inflate_end(&zb);
501 	return err;
502 }
503 
504 const struct got_error *
505 got_inflate_to_file(size_t *outlen, FILE *infile,
506     struct got_inflate_checksum *csum, FILE *outfile)
507 {
508 	const struct got_error *err;
509 	size_t avail;
510 	struct got_inflate_buf zb;
511 
512 	err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE, csum);
513 	if (err)
514 		goto done;
515 
516 	*outlen = 0;
517 
518 	do {
519 		err = got_inflate_read(&zb, infile, &avail, NULL);
520 		if (err)
521 			goto done;
522 		if (avail > 0) {
523 			size_t n;
524 			n = fwrite(zb.outbuf, avail, 1, outfile);
525 			if (n != 1) {
526 				err = got_ferror(outfile, GOT_ERR_IO);
527 				goto done;
528 			}
529 			*outlen += avail;
530 		}
531 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
532 
533 done:
534 	if (err == NULL)
535 		rewind(outfile);
536 	got_inflate_end(&zb);
537 	return err;
538 }
539 
540 const struct got_error *
541 got_inflate_to_file_fd(size_t *outlen, size_t *consumed_total,
542     struct got_inflate_checksum *csum, int infd, FILE *outfile)
543 {
544 	const struct got_error *err;
545 	size_t avail, consumed;
546 	struct got_inflate_buf zb;
547 
548 	err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE, csum);
549 	if (err)
550 		goto done;
551 
552 	*outlen = 0;
553 	if (consumed_total)
554 		*consumed_total = 0;
555 	do {
556 		err = got_inflate_read_fd(&zb, infd, &avail, &consumed);
557 		if (err)
558 			goto done;
559 		if (avail > 0) {
560 			size_t n;
561 			n = fwrite(zb.outbuf, avail, 1, outfile);
562 			if (n != 1) {
563 				err = got_ferror(outfile, GOT_ERR_IO);
564 				goto done;
565 			}
566 			*outlen += avail;
567 			if (consumed_total)
568 				*consumed_total += consumed;
569 		}
570 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
571 
572 done:
573 	if (err == NULL)
574 		rewind(outfile);
575 	got_inflate_end(&zb);
576 	return err;
577 }
578 
579 const struct got_error *
580 got_inflate_to_file_mmap(size_t *outlen, size_t *consumed_total,
581     struct got_inflate_checksum *csum, uint8_t *map, size_t offset,
582     size_t len, FILE *outfile)
583 {
584 	const struct got_error *err;
585 	size_t avail, consumed;
586 	struct got_inflate_buf zb;
587 
588 	err = got_inflate_init(&zb, NULL, GOT_INFLATE_BUFSIZE, csum);
589 	if (err)
590 		goto done;
591 
592 	*outlen = 0;
593 	if (consumed_total)
594 		*consumed_total = 0;
595 	do {
596 		err = got_inflate_read_mmap(&zb, map, offset, len, &avail,
597 		    &consumed);
598 		if (err)
599 			goto done;
600 		offset += consumed;
601 		if (consumed_total)
602 			*consumed_total += consumed;
603 		len -= consumed;
604 		if (avail > 0) {
605 			size_t n;
606 			n = fwrite(zb.outbuf, avail, 1, outfile);
607 			if (n != 1) {
608 				err = got_ferror(outfile, GOT_ERR_IO);
609 				goto done;
610 			}
611 			*outlen += avail;
612 		}
613 	} while (zb.flags & GOT_INFLATE_F_HAVE_MORE);
614 
615 done:
616 	if (err == NULL)
617 		rewind(outfile);
618 	got_inflate_end(&zb);
619 	return err;
620 }