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Commit | Line | Data |
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3d74982f RS |
1 | /* |
2 | * Copyright (c) 2005, 2006 Rene Scharfe | |
3 | */ | |
3d74982f | 4 | #include "cache.h" |
b2141fc1 | 5 | #include "config.h" |
3d74982f | 6 | #include "tar.h" |
3d74982f | 7 | #include "archive.h" |
cbd53a21 | 8 | #include "object-store.h" |
5544049d | 9 | #include "streaming.h" |
767cf457 | 10 | #include "run-command.h" |
3d74982f RS |
11 | |
12 | #define RECORDSIZE (512) | |
13 | #define BLOCKSIZE (RECORDSIZE * 20) | |
14 | ||
15 | static char block[BLOCKSIZE]; | |
16 | static unsigned long offset; | |
17 | ||
f08b3b0e | 18 | static int tar_umask = 002; |
3d74982f | 19 | |
767cf457 JK |
20 | static int write_tar_filter_archive(const struct archiver *ar, |
21 | struct archiver_args *args); | |
22 | ||
d1657b57 JK |
23 | /* |
24 | * This is the max value that a ustar size header can specify, as it is fixed | |
25 | * at 11 octal digits. POSIX specifies that we switch to extended headers at | |
26 | * this size. | |
6e8e0991 JK |
27 | * |
28 | * Likewise for the mtime (which happens to use a buffer of the same size). | |
d1657b57 | 29 | */ |
29493589 JH |
30 | #if ULONG_MAX == 0xFFFFFFFF |
31 | #define USTAR_MAX_SIZE ULONG_MAX | |
29493589 | 32 | #else |
3f789719 | 33 | #define USTAR_MAX_SIZE 077777777777UL |
dddbad72 JS |
34 | #endif |
35 | #if TIME_MAX == 0xFFFFFFFF | |
36 | #define USTAR_MAX_MTIME TIME_MAX | |
37 | #else | |
3f789719 | 38 | #define USTAR_MAX_MTIME 077777777777ULL |
29493589 | 39 | #endif |
d1657b57 | 40 | |
76d76026 | 41 | static void tar_write_block(const void *buf) |
dfce1186 RS |
42 | { |
43 | write_or_die(1, buf, BLOCKSIZE); | |
44 | } | |
45 | ||
76d76026 RS |
46 | static void (*write_block)(const void *) = tar_write_block; |
47 | ||
3d74982f RS |
48 | /* writes out the whole block, but only if it is full */ |
49 | static void write_if_needed(void) | |
50 | { | |
51 | if (offset == BLOCKSIZE) { | |
dfce1186 | 52 | write_block(block); |
3d74982f RS |
53 | offset = 0; |
54 | } | |
55 | } | |
56 | ||
57 | /* | |
58 | * queues up writes, so that all our write(2) calls write exactly one | |
59 | * full block; pads writes to RECORDSIZE | |
60 | */ | |
5544049d | 61 | static void do_write_blocked(const void *data, unsigned long size) |
3d74982f RS |
62 | { |
63 | const char *buf = data; | |
3d74982f RS |
64 | |
65 | if (offset) { | |
66 | unsigned long chunk = BLOCKSIZE - offset; | |
67 | if (size < chunk) | |
68 | chunk = size; | |
69 | memcpy(block + offset, buf, chunk); | |
70 | size -= chunk; | |
71 | offset += chunk; | |
72 | buf += chunk; | |
73 | write_if_needed(); | |
74 | } | |
75 | while (size >= BLOCKSIZE) { | |
dfce1186 | 76 | write_block(buf); |
3d74982f RS |
77 | size -= BLOCKSIZE; |
78 | buf += BLOCKSIZE; | |
79 | } | |
80 | if (size) { | |
81 | memcpy(block + offset, buf, size); | |
82 | offset += size; | |
83 | } | |
5544049d NTND |
84 | } |
85 | ||
86 | static void finish_record(void) | |
87 | { | |
88 | unsigned long tail; | |
3d74982f RS |
89 | tail = offset % RECORDSIZE; |
90 | if (tail) { | |
91 | memset(block + offset, 0, RECORDSIZE - tail); | |
92 | offset += RECORDSIZE - tail; | |
93 | } | |
94 | write_if_needed(); | |
95 | } | |
96 | ||
5544049d NTND |
97 | static void write_blocked(const void *data, unsigned long size) |
98 | { | |
99 | do_write_blocked(data, size); | |
100 | finish_record(); | |
101 | } | |
102 | ||
3d74982f RS |
103 | /* |
104 | * The end of tar archives is marked by 2*512 nul bytes and after that | |
105 | * follows the rest of the block (if any). | |
106 | */ | |
107 | static void write_trailer(void) | |
108 | { | |
109 | int tail = BLOCKSIZE - offset; | |
110 | memset(block + offset, 0, tail); | |
dfce1186 | 111 | write_block(block); |
3d74982f RS |
112 | if (tail < 2 * RECORDSIZE) { |
113 | memset(block, 0, offset); | |
dfce1186 | 114 | write_block(block); |
3d74982f RS |
115 | } |
116 | } | |
117 | ||
5544049d NTND |
118 | /* |
119 | * queues up writes, so that all our write(2) calls write exactly one | |
120 | * full block; pads writes to RECORDSIZE | |
121 | */ | |
c8123e72 | 122 | static int stream_blocked(struct repository *r, const struct object_id *oid) |
5544049d NTND |
123 | { |
124 | struct git_istream *st; | |
125 | enum object_type type; | |
126 | unsigned long sz; | |
127 | char buf[BLOCKSIZE]; | |
128 | ssize_t readlen; | |
129 | ||
c8123e72 | 130 | st = open_istream(r, oid, &type, &sz, NULL); |
5544049d | 131 | if (!st) |
d0482e69 | 132 | return error(_("cannot stream blob %s"), oid_to_hex(oid)); |
5544049d NTND |
133 | for (;;) { |
134 | readlen = read_istream(st, buf, sizeof(buf)); | |
135 | if (readlen <= 0) | |
136 | break; | |
137 | do_write_blocked(buf, readlen); | |
138 | } | |
139 | close_istream(st); | |
140 | if (!readlen) | |
141 | finish_record(); | |
142 | return readlen; | |
143 | } | |
144 | ||
3d74982f RS |
145 | /* |
146 | * pax extended header records have the format "%u %s=%s\n". %u contains | |
147 | * the size of the whole string (including the %u), the first %s is the | |
148 | * keyword, the second one is the value. This function constructs such a | |
149 | * string and appends it to a struct strbuf. | |
150 | */ | |
151 | static void strbuf_append_ext_header(struct strbuf *sb, const char *keyword, | |
17e9ef00 | 152 | const char *value, size_t valuelen) |
3d74982f | 153 | { |
4060c199 | 154 | size_t orig_len = sb->len; |
17e9ef00 | 155 | size_t len, tmp; |
3d74982f RS |
156 | |
157 | /* "%u %s=%s\n" */ | |
158 | len = 1 + 1 + strlen(keyword) + 1 + valuelen + 1; | |
82a46af1 | 159 | for (tmp = 1; len / 10 >= tmp; tmp *= 10) |
3d74982f RS |
160 | len++; |
161 | ||
7a604f16 | 162 | strbuf_grow(sb, len); |
17e9ef00 | 163 | strbuf_addf(sb, "%"PRIuMAX" %s=", (uintmax_t)len, keyword); |
7a604f16 PH |
164 | strbuf_add(sb, value, valuelen); |
165 | strbuf_addch(sb, '\n'); | |
4060c199 RS |
166 | |
167 | if (len != sb->len - orig_len) | |
71d41ff6 RS |
168 | BUG("pax extended header length miscalculated as %"PRIuMAX |
169 | ", should be %"PRIuMAX, | |
170 | (uintmax_t)len, (uintmax_t)(sb->len - orig_len)); | |
3d74982f RS |
171 | } |
172 | ||
d1657b57 JK |
173 | /* |
174 | * Like strbuf_append_ext_header, but for numeric values. | |
175 | */ | |
176 | static void strbuf_append_ext_header_uint(struct strbuf *sb, | |
177 | const char *keyword, | |
178 | uintmax_t value) | |
179 | { | |
180 | char buf[40]; /* big enough for 2^128 in decimal, plus NUL */ | |
181 | int len; | |
182 | ||
183 | len = xsnprintf(buf, sizeof(buf), "%"PRIuMAX, value); | |
184 | strbuf_append_ext_header(sb, keyword, buf, len); | |
185 | } | |
186 | ||
3d74982f RS |
187 | static unsigned int ustar_header_chksum(const struct ustar_header *header) |
188 | { | |
a5a46eb9 | 189 | const unsigned char *p = (const unsigned char *)header; |
3d74982f | 190 | unsigned int chksum = 0; |
a5a46eb9 | 191 | while (p < (const unsigned char *)header->chksum) |
3d74982f RS |
192 | chksum += *p++; |
193 | chksum += sizeof(header->chksum) * ' '; | |
194 | p += sizeof(header->chksum); | |
a5a46eb9 | 195 | while (p < (const unsigned char *)header + sizeof(struct ustar_header)) |
3d74982f RS |
196 | chksum += *p++; |
197 | return chksum; | |
198 | } | |
199 | ||
562e25ab | 200 | static size_t get_path_prefix(const char *path, size_t pathlen, size_t maxlen) |
3d74982f | 201 | { |
562e25ab | 202 | size_t i = pathlen; |
22f0dcd9 RS |
203 | if (i > 1 && path[i - 1] == '/') |
204 | i--; | |
3d74982f RS |
205 | if (i > maxlen) |
206 | i = maxlen; | |
207 | do { | |
208 | i--; | |
562e25ab | 209 | } while (i > 0 && path[i] != '/'); |
3d74982f RS |
210 | return i; |
211 | } | |
212 | ||
d240d410 NTND |
213 | static void prepare_header(struct archiver_args *args, |
214 | struct ustar_header *header, | |
215 | unsigned int mode, unsigned long size) | |
216 | { | |
f2f02675 | 217 | xsnprintf(header->mode, sizeof(header->mode), "%07o", mode & 07777); |
ca473cef | 218 | xsnprintf(header->size, sizeof(header->size), "%011"PRIoMAX , S_ISREG(mode) ? (uintmax_t)size : (uintmax_t)0); |
f2f02675 | 219 | xsnprintf(header->mtime, sizeof(header->mtime), "%011lo", (unsigned long) args->time); |
d240d410 | 220 | |
f2f02675 JK |
221 | xsnprintf(header->uid, sizeof(header->uid), "%07o", 0); |
222 | xsnprintf(header->gid, sizeof(header->gid), "%07o", 0); | |
d240d410 NTND |
223 | strlcpy(header->uname, "root", sizeof(header->uname)); |
224 | strlcpy(header->gname, "root", sizeof(header->gname)); | |
f2f02675 JK |
225 | xsnprintf(header->devmajor, sizeof(header->devmajor), "%07o", 0); |
226 | xsnprintf(header->devminor, sizeof(header->devminor), "%07o", 0); | |
d240d410 NTND |
227 | |
228 | memcpy(header->magic, "ustar", 6); | |
229 | memcpy(header->version, "00", 2); | |
230 | ||
9e6c1e91 | 231 | xsnprintf(header->chksum, sizeof(header->chksum), "%07o", ustar_header_chksum(header)); |
d240d410 NTND |
232 | } |
233 | ||
560b0e8f | 234 | static void write_extended_header(struct archiver_args *args, |
015ff4f8 | 235 | const struct object_id *oid, |
560b0e8f | 236 | const void *buffer, unsigned long size) |
d240d410 NTND |
237 | { |
238 | struct ustar_header header; | |
239 | unsigned int mode; | |
240 | memset(&header, 0, sizeof(header)); | |
241 | *header.typeflag = TYPEFLAG_EXT_HEADER; | |
15c6ef7b | 242 | mode = 0100666; |
015ff4f8 | 243 | xsnprintf(header.name, sizeof(header.name), "%s.paxheader", oid_to_hex(oid)); |
d240d410 NTND |
244 | prepare_header(args, &header, mode, size); |
245 | write_blocked(&header, sizeof(header)); | |
246 | write_blocked(buffer, size); | |
d240d410 NTND |
247 | } |
248 | ||
562e25ab | 249 | static int write_tar_entry(struct archiver_args *args, |
015ff4f8 | 250 | const struct object_id *oid, |
9cb513b7 | 251 | const char *path, size_t pathlen, |
200589ab RS |
252 | unsigned int mode, |
253 | void *buffer, unsigned long size) | |
3d74982f RS |
254 | { |
255 | struct ustar_header header; | |
f285a2d7 | 256 | struct strbuf ext_header = STRBUF_INIT; |
200589ab | 257 | unsigned long size_in_header; |
562e25ab | 258 | int err = 0; |
3d74982f RS |
259 | |
260 | memset(&header, 0, sizeof(header)); | |
3d74982f | 261 | |
85390709 NTND |
262 | if (S_ISDIR(mode) || S_ISGITLINK(mode)) { |
263 | *header.typeflag = TYPEFLAG_DIR; | |
264 | mode = (mode | 0777) & ~tar_umask; | |
265 | } else if (S_ISLNK(mode)) { | |
266 | *header.typeflag = TYPEFLAG_LNK; | |
267 | mode |= 0777; | |
268 | } else if (S_ISREG(mode)) { | |
269 | *header.typeflag = TYPEFLAG_REG; | |
270 | mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask; | |
3d74982f | 271 | } else { |
d0482e69 | 272 | return error(_("unsupported file mode: 0%o (SHA1: %s)"), |
015ff4f8 | 273 | mode, oid_to_hex(oid)); |
85390709 NTND |
274 | } |
275 | if (pathlen > sizeof(header.name)) { | |
276 | size_t plen = get_path_prefix(path, pathlen, | |
277 | sizeof(header.prefix)); | |
278 | size_t rest = pathlen - plen - 1; | |
279 | if (plen > 0 && rest <= sizeof(header.name)) { | |
280 | memcpy(header.prefix, path, plen); | |
108332c7 | 281 | memcpy(header.name, path + plen + 1, rest); |
3d74982f | 282 | } else { |
f2f02675 | 283 | xsnprintf(header.name, sizeof(header.name), "%s.data", |
015ff4f8 | 284 | oid_to_hex(oid)); |
85390709 NTND |
285 | strbuf_append_ext_header(&ext_header, "path", |
286 | path, pathlen); | |
3d74982f | 287 | } |
85390709 NTND |
288 | } else |
289 | memcpy(header.name, path, pathlen); | |
3d74982f | 290 | |
9cb513b7 | 291 | if (S_ISLNK(mode)) { |
3d74982f | 292 | if (size > sizeof(header.linkname)) { |
f2f02675 | 293 | xsnprintf(header.linkname, sizeof(header.linkname), |
015ff4f8 | 294 | "see %s.paxheader", oid_to_hex(oid)); |
3d74982f RS |
295 | strbuf_append_ext_header(&ext_header, "linkpath", |
296 | buffer, size); | |
297 | } else | |
298 | memcpy(header.linkname, buffer, size); | |
299 | } | |
300 | ||
d1657b57 JK |
301 | size_in_header = size; |
302 | if (S_ISREG(mode) && size > USTAR_MAX_SIZE) { | |
303 | size_in_header = 0; | |
304 | strbuf_append_ext_header_uint(&ext_header, "size", size); | |
305 | } | |
306 | ||
307 | prepare_header(args, &header, mode, size_in_header); | |
3d74982f RS |
308 | |
309 | if (ext_header.len > 0) { | |
015ff4f8 | 310 | write_extended_header(args, oid, ext_header.buf, |
560b0e8f | 311 | ext_header.len); |
3d74982f | 312 | } |
7a604f16 | 313 | strbuf_release(&ext_header); |
3d74982f | 314 | write_blocked(&header, sizeof(header)); |
5544049d NTND |
315 | if (S_ISREG(mode) && size > 0) { |
316 | if (buffer) | |
317 | write_blocked(buffer, size); | |
318 | else | |
c8123e72 | 319 | err = stream_blocked(args->repo, oid); |
5544049d | 320 | } |
562e25ab | 321 | return err; |
3d74982f RS |
322 | } |
323 | ||
5caeeb83 | 324 | static void write_global_extended_header(struct archiver_args *args) |
3d74982f | 325 | { |
bbf05cf7 | 326 | const struct object_id *oid = args->commit_oid; |
f285a2d7 | 327 | struct strbuf ext_header = STRBUF_INIT; |
d240d410 NTND |
328 | struct ustar_header header; |
329 | unsigned int mode; | |
7a604f16 | 330 | |
bbf05cf7 | 331 | if (oid) |
6e8e0991 | 332 | strbuf_append_ext_header(&ext_header, "comment", |
bbf05cf7 | 333 | oid_to_hex(oid), |
334 | the_hash_algo->hexsz); | |
6e8e0991 JK |
335 | if (args->time > USTAR_MAX_MTIME) { |
336 | strbuf_append_ext_header_uint(&ext_header, "mtime", | |
337 | args->time); | |
338 | args->time = USTAR_MAX_MTIME; | |
339 | } | |
340 | ||
341 | if (!ext_header.len) | |
5caeeb83 | 342 | return; |
6e8e0991 | 343 | |
d240d410 NTND |
344 | memset(&header, 0, sizeof(header)); |
345 | *header.typeflag = TYPEFLAG_GLOBAL_HEADER; | |
15c6ef7b | 346 | mode = 0100666; |
5096d490 | 347 | xsnprintf(header.name, sizeof(header.name), "pax_global_header"); |
d240d410 NTND |
348 | prepare_header(args, &header, mode, ext_header.len); |
349 | write_blocked(&header, sizeof(header)); | |
350 | write_blocked(ext_header.buf, ext_header.len); | |
7a604f16 | 351 | strbuf_release(&ext_header); |
3d74982f RS |
352 | } |
353 | ||
767cf457 JK |
354 | static struct archiver **tar_filters; |
355 | static int nr_tar_filters; | |
356 | static int alloc_tar_filters; | |
357 | ||
f5914f4b | 358 | static struct archiver *find_tar_filter(const char *name, size_t len) |
767cf457 JK |
359 | { |
360 | int i; | |
361 | for (i = 0; i < nr_tar_filters; i++) { | |
362 | struct archiver *ar = tar_filters[i]; | |
363 | if (!strncmp(ar->name, name, len) && !ar->name[len]) | |
364 | return ar; | |
365 | } | |
366 | return NULL; | |
367 | } | |
368 | ||
783a86c1 | 369 | static int tar_filter_config(const char *var, const char *value, |
5cf88fd8 | 370 | void *data UNUSED) |
767cf457 JK |
371 | { |
372 | struct archiver *ar; | |
767cf457 JK |
373 | const char *name; |
374 | const char *type; | |
f5914f4b | 375 | size_t namelen; |
767cf457 | 376 | |
785a0429 | 377 | if (parse_config_key(var, "tar", &name, &namelen, &type) < 0 || !name) |
767cf457 | 378 | return 0; |
767cf457 JK |
379 | |
380 | ar = find_tar_filter(name, namelen); | |
381 | if (!ar) { | |
ca56dadb | 382 | CALLOC_ARRAY(ar, 1); |
767cf457 JK |
383 | ar->name = xmemdupz(name, namelen); |
384 | ar->write_archive = write_tar_filter_archive; | |
cde8ea9c RS |
385 | ar->flags = ARCHIVER_WANT_COMPRESSION_LEVELS | |
386 | ARCHIVER_HIGH_COMPRESSION_LEVELS; | |
767cf457 JK |
387 | ALLOC_GROW(tar_filters, nr_tar_filters + 1, alloc_tar_filters); |
388 | tar_filters[nr_tar_filters++] = ar; | |
389 | } | |
390 | ||
391 | if (!strcmp(type, "command")) { | |
392 | if (!value) | |
393 | return config_error_nonbool(var); | |
96b9e515 RS |
394 | free(ar->filter_command); |
395 | ar->filter_command = xstrdup(value); | |
767cf457 JK |
396 | return 0; |
397 | } | |
7b97730b JK |
398 | if (!strcmp(type, "remote")) { |
399 | if (git_config_bool(var, value)) | |
400 | ar->flags |= ARCHIVER_REMOTE; | |
401 | else | |
402 | ar->flags &= ~ARCHIVER_REMOTE; | |
403 | return 0; | |
404 | } | |
767cf457 JK |
405 | |
406 | return 0; | |
407 | } | |
408 | ||
ef90d6d4 | 409 | static int git_tar_config(const char *var, const char *value, void *cb) |
3d74982f RS |
410 | { |
411 | if (!strcmp(var, "tar.umask")) { | |
cc1816b0 | 412 | if (value && !strcmp(value, "user")) { |
3d74982f RS |
413 | tar_umask = umask(0); |
414 | umask(tar_umask); | |
415 | } else { | |
416 | tar_umask = git_config_int(var, value); | |
417 | } | |
418 | return 0; | |
419 | } | |
767cf457 JK |
420 | |
421 | return tar_filter_config(var, value, cb); | |
3d74982f RS |
422 | } |
423 | ||
5cf88fd8 | 424 | static int write_tar_archive(const struct archiver *ar UNUSED, |
4d7c9898 | 425 | struct archiver_args *args) |
3d74982f | 426 | { |
562e25ab | 427 | int err = 0; |
3d74982f | 428 | |
5caeeb83 JK |
429 | write_global_extended_header(args); |
430 | err = write_archive_entries(args, write_tar_entry); | |
562e25ab RS |
431 | if (!err) |
432 | write_trailer(); | |
433 | return err; | |
3d74982f | 434 | } |
13e0f88d | 435 | |
76d76026 RS |
436 | static git_zstream gzstream; |
437 | static unsigned char outbuf[16384]; | |
438 | ||
439 | static void tgz_deflate(int flush) | |
440 | { | |
441 | while (gzstream.avail_in || flush == Z_FINISH) { | |
442 | int status = git_deflate(&gzstream, flush); | |
443 | if (!gzstream.avail_out || status == Z_STREAM_END) { | |
444 | write_or_die(1, outbuf, gzstream.next_out - outbuf); | |
445 | gzstream.next_out = outbuf; | |
446 | gzstream.avail_out = sizeof(outbuf); | |
447 | if (status == Z_STREAM_END) | |
448 | break; | |
449 | } | |
450 | if (status != Z_OK && status != Z_BUF_ERROR) | |
451 | die(_("deflate error (%d)"), status); | |
452 | } | |
453 | } | |
454 | ||
455 | static void tgz_write_block(const void *data) | |
456 | { | |
457 | gzstream.next_in = (void *)data; | |
458 | gzstream.avail_in = BLOCKSIZE; | |
459 | tgz_deflate(Z_NO_FLUSH); | |
460 | } | |
461 | ||
462 | static const char internal_gzip_command[] = "git archive gzip"; | |
463 | ||
767cf457 JK |
464 | static int write_tar_filter_archive(const struct archiver *ar, |
465 | struct archiver_args *args) | |
466 | { | |
23fcf8b0 RS |
467 | #if ZLIB_VERNUM >= 0x1221 |
468 | struct gz_header_s gzhead = { .os = 3 }; /* Unix, for reproducibility */ | |
469 | #endif | |
767cf457 | 470 | struct strbuf cmd = STRBUF_INIT; |
d3180279 | 471 | struct child_process filter = CHILD_PROCESS_INIT; |
767cf457 JK |
472 | int r; |
473 | ||
96b9e515 | 474 | if (!ar->filter_command) |
033abf97 | 475 | BUG("tar-filter archiver called with no filter defined"); |
767cf457 | 476 | |
76d76026 RS |
477 | if (!strcmp(ar->filter_command, internal_gzip_command)) { |
478 | write_block = tgz_write_block; | |
479 | git_deflate_init_gzip(&gzstream, args->compression_level); | |
23fcf8b0 RS |
480 | #if ZLIB_VERNUM >= 0x1221 |
481 | if (deflateSetHeader(&gzstream.z, &gzhead) != Z_OK) | |
482 | BUG("deflateSetHeader() called too late"); | |
483 | #endif | |
76d76026 RS |
484 | gzstream.next_out = outbuf; |
485 | gzstream.avail_out = sizeof(outbuf); | |
486 | ||
487 | r = write_tar_archive(ar, args); | |
488 | ||
489 | tgz_deflate(Z_FINISH); | |
490 | git_deflate_end(&gzstream); | |
491 | return r; | |
492 | } | |
493 | ||
96b9e515 | 494 | strbuf_addstr(&cmd, ar->filter_command); |
767cf457 JK |
495 | if (args->compression_level >= 0) |
496 | strbuf_addf(&cmd, " -%d", args->compression_level); | |
497 | ||
7f14609e | 498 | strvec_push(&filter.args, cmd.buf); |
767cf457 JK |
499 | filter.use_shell = 1; |
500 | filter.in = -1; | |
501 | ||
502 | if (start_command(&filter) < 0) | |
7f14609e | 503 | die_errno(_("unable to start '%s' filter"), cmd.buf); |
767cf457 JK |
504 | close(1); |
505 | if (dup2(filter.in, 1) < 0) | |
d0482e69 | 506 | die_errno(_("unable to redirect descriptor")); |
767cf457 JK |
507 | close(filter.in); |
508 | ||
509 | r = write_tar_archive(ar, args); | |
510 | ||
511 | close(1); | |
512 | if (finish_command(&filter) != 0) | |
7f14609e | 513 | die(_("'%s' filter reported error"), cmd.buf); |
767cf457 JK |
514 | |
515 | strbuf_release(&cmd); | |
516 | return r; | |
517 | } | |
518 | ||
13e0f88d | 519 | static struct archiver tar_archiver = { |
4fbedd4d ÆAB |
520 | .name = "tar", |
521 | .write_archive = write_tar_archive, | |
522 | .flags = ARCHIVER_REMOTE, | |
13e0f88d JK |
523 | }; |
524 | ||
525 | void init_tar_archiver(void) | |
526 | { | |
767cf457 | 527 | int i; |
13e0f88d | 528 | register_archiver(&tar_archiver); |
767cf457 | 529 | |
4f4be00d | 530 | tar_filter_config("tar.tgz.command", internal_gzip_command, NULL); |
7b97730b | 531 | tar_filter_config("tar.tgz.remote", "true", NULL); |
4f4be00d | 532 | tar_filter_config("tar.tar.gz.command", internal_gzip_command, NULL); |
7b97730b | 533 | tar_filter_config("tar.tar.gz.remote", "true", NULL); |
13e0f88d | 534 | git_config(git_tar_config, NULL); |
767cf457 JK |
535 | for (i = 0; i < nr_tar_filters; i++) { |
536 | /* omit any filters that never had a command configured */ | |
96b9e515 | 537 | if (tar_filters[i]->filter_command) |
767cf457 JK |
538 | register_archiver(tar_filters[i]); |
539 | } | |
13e0f88d | 540 | } |