2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
6 * This handles basic git sha1 object files - packing, unpacking,
18 #if defined(__linux__) && (defined(__i386__) || defined(__PPC__))
19 #define O_NOATIME 01000000
25 const unsigned char null_sha1
[20];
27 static unsigned int sha1_file_open_flag
= O_NOATIME
;
29 signed char hexval_table
[256] = {
30 -1, -1, -1, -1, -1, -1, -1, -1, /* 00-07 */
31 -1, -1, -1, -1, -1, -1, -1, -1, /* 08-0f */
32 -1, -1, -1, -1, -1, -1, -1, -1, /* 10-17 */
33 -1, -1, -1, -1, -1, -1, -1, -1, /* 18-1f */
34 -1, -1, -1, -1, -1, -1, -1, -1, /* 20-27 */
35 -1, -1, -1, -1, -1, -1, -1, -1, /* 28-2f */
36 0, 1, 2, 3, 4, 5, 6, 7, /* 30-37 */
37 8, 9, -1, -1, -1, -1, -1, -1, /* 38-3f */
38 -1, 10, 11, 12, 13, 14, 15, -1, /* 40-47 */
39 -1, -1, -1, -1, -1, -1, -1, -1, /* 48-4f */
40 -1, -1, -1, -1, -1, -1, -1, -1, /* 50-57 */
41 -1, -1, -1, -1, -1, -1, -1, -1, /* 58-5f */
42 -1, 10, 11, 12, 13, 14, 15, -1, /* 60-67 */
43 -1, -1, -1, -1, -1, -1, -1, -1, /* 68-67 */
44 -1, -1, -1, -1, -1, -1, -1, -1, /* 70-77 */
45 -1, -1, -1, -1, -1, -1, -1, -1, /* 78-7f */
46 -1, -1, -1, -1, -1, -1, -1, -1, /* 80-87 */
47 -1, -1, -1, -1, -1, -1, -1, -1, /* 88-8f */
48 -1, -1, -1, -1, -1, -1, -1, -1, /* 90-97 */
49 -1, -1, -1, -1, -1, -1, -1, -1, /* 98-9f */
50 -1, -1, -1, -1, -1, -1, -1, -1, /* a0-a7 */
51 -1, -1, -1, -1, -1, -1, -1, -1, /* a8-af */
52 -1, -1, -1, -1, -1, -1, -1, -1, /* b0-b7 */
53 -1, -1, -1, -1, -1, -1, -1, -1, /* b8-bf */
54 -1, -1, -1, -1, -1, -1, -1, -1, /* c0-c7 */
55 -1, -1, -1, -1, -1, -1, -1, -1, /* c8-cf */
56 -1, -1, -1, -1, -1, -1, -1, -1, /* d0-d7 */
57 -1, -1, -1, -1, -1, -1, -1, -1, /* d8-df */
58 -1, -1, -1, -1, -1, -1, -1, -1, /* e0-e7 */
59 -1, -1, -1, -1, -1, -1, -1, -1, /* e8-ef */
60 -1, -1, -1, -1, -1, -1, -1, -1, /* f0-f7 */
61 -1, -1, -1, -1, -1, -1, -1, -1, /* f8-ff */
64 int get_sha1_hex(const char *hex
, unsigned char *sha1
)
67 for (i
= 0; i
< 20; i
++) {
68 unsigned int val
= (hexval(hex
[0]) << 4) | hexval(hex
[1]);
77 int safe_create_leading_directories(char *path
)
86 pos
= strchr(pos
, '/');
90 if (!stat(path
, &st
)) {
92 if (!S_ISDIR(st
.st_mode
)) {
97 else if (mkdir(path
, 0777)) {
101 else if (adjust_shared_perm(path
)) {
110 char * sha1_to_hex(const unsigned char *sha1
)
113 static char hexbuffer
[4][50];
114 static const char hex
[] = "0123456789abcdef";
115 char *buffer
= hexbuffer
[3 & ++bufno
], *buf
= buffer
;
118 for (i
= 0; i
< 20; i
++) {
119 unsigned int val
= *sha1
++;
120 *buf
++ = hex
[val
>> 4];
121 *buf
++ = hex
[val
& 0xf];
128 static void fill_sha1_path(char *pathbuf
, const unsigned char *sha1
)
131 for (i
= 0; i
< 20; i
++) {
132 static char hex
[] = "0123456789abcdef";
133 unsigned int val
= sha1
[i
];
134 char *pos
= pathbuf
+ i
*2 + (i
> 0);
135 *pos
++ = hex
[val
>> 4];
136 *pos
= hex
[val
& 0xf];
141 * NOTE! This returns a statically allocated buffer, so you have to be
142 * careful about using it. Do a "xstrdup()" if you need to save the
145 * Also note that this returns the location for creating. Reading
146 * SHA1 file can happen from any alternate directory listed in the
147 * DB_ENVIRONMENT environment variable if it is not found in
148 * the primary object database.
150 char *sha1_file_name(const unsigned char *sha1
)
152 static char *name
, *base
;
155 const char *sha1_file_directory
= get_object_directory();
156 int len
= strlen(sha1_file_directory
);
157 base
= xmalloc(len
+ 60);
158 memcpy(base
, sha1_file_directory
, len
);
159 memset(base
+len
, 0, 60);
162 name
= base
+ len
+ 1;
164 fill_sha1_path(name
, sha1
);
168 char *sha1_pack_name(const unsigned char *sha1
)
170 static const char hex
[] = "0123456789abcdef";
171 static char *name
, *base
, *buf
;
175 const char *sha1_file_directory
= get_object_directory();
176 int len
= strlen(sha1_file_directory
);
177 base
= xmalloc(len
+ 60);
178 sprintf(base
, "%s/pack/pack-1234567890123456789012345678901234567890.pack", sha1_file_directory
);
179 name
= base
+ len
+ 11;
184 for (i
= 0; i
< 20; i
++) {
185 unsigned int val
= *sha1
++;
186 *buf
++ = hex
[val
>> 4];
187 *buf
++ = hex
[val
& 0xf];
193 char *sha1_pack_index_name(const unsigned char *sha1
)
195 static const char hex
[] = "0123456789abcdef";
196 static char *name
, *base
, *buf
;
200 const char *sha1_file_directory
= get_object_directory();
201 int len
= strlen(sha1_file_directory
);
202 base
= xmalloc(len
+ 60);
203 sprintf(base
, "%s/pack/pack-1234567890123456789012345678901234567890.idx", sha1_file_directory
);
204 name
= base
+ len
+ 11;
209 for (i
= 0; i
< 20; i
++) {
210 unsigned int val
= *sha1
++;
211 *buf
++ = hex
[val
>> 4];
212 *buf
++ = hex
[val
& 0xf];
218 struct alternate_object_database
*alt_odb_list
;
219 static struct alternate_object_database
**alt_odb_tail
;
221 static void read_info_alternates(const char * alternates
, int depth
);
224 * Prepare alternate object database registry.
226 * The variable alt_odb_list points at the list of struct
227 * alternate_object_database. The elements on this list come from
228 * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT
229 * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates,
230 * whose contents is similar to that environment variable but can be
231 * LF separated. Its base points at a statically allocated buffer that
232 * contains "/the/directory/corresponding/to/.git/objects/...", while
233 * its name points just after the slash at the end of ".git/objects/"
234 * in the example above, and has enough space to hold 40-byte hex
235 * SHA1, an extra slash for the first level indirection, and the
238 static int link_alt_odb_entry(const char * entry
, int len
, const char * relative_base
, int depth
)
241 const char *objdir
= get_object_directory();
242 struct alternate_object_database
*ent
;
243 struct alternate_object_database
*alt
;
244 /* 43 = 40-byte + 2 '/' + terminating NUL */
246 int entlen
= pfxlen
+ 43;
249 if (*entry
!= '/' && relative_base
) {
250 /* Relative alt-odb */
252 base_len
= strlen(relative_base
) + 1;
256 ent
= xmalloc(sizeof(*ent
) + entlen
);
258 if (*entry
!= '/' && relative_base
) {
259 memcpy(ent
->base
, relative_base
, base_len
- 1);
260 ent
->base
[base_len
- 1] = '/';
261 memcpy(ent
->base
+ base_len
, entry
, len
);
264 memcpy(ent
->base
, entry
, pfxlen
);
266 ent
->name
= ent
->base
+ pfxlen
+ 1;
267 ent
->base
[pfxlen
+ 3] = '/';
268 ent
->base
[pfxlen
] = ent
->base
[entlen
-1] = 0;
270 /* Detect cases where alternate disappeared */
271 if (stat(ent
->base
, &st
) || !S_ISDIR(st
.st_mode
)) {
272 error("object directory %s does not exist; "
273 "check .git/objects/info/alternates.",
279 /* Prevent the common mistake of listing the same
280 * thing twice, or object directory itself.
282 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
283 if (!memcmp(ent
->base
, alt
->base
, pfxlen
)) {
288 if (!memcmp(ent
->base
, objdir
, pfxlen
)) {
293 /* add the alternate entry */
295 alt_odb_tail
= &(ent
->next
);
298 /* recursively add alternates */
299 read_info_alternates(ent
->base
, depth
+ 1);
301 ent
->base
[pfxlen
] = '/';
306 static void link_alt_odb_entries(const char *alt
, const char *ep
, int sep
,
307 const char *relative_base
, int depth
)
309 const char *cp
, *last
;
312 error("%s: ignoring alternate object stores, nesting too deep.",
320 if (cp
< ep
&& *cp
== '#') {
321 while (cp
< ep
&& *cp
!= sep
)
326 while (cp
< ep
&& *cp
!= sep
)
329 if ((*last
!= '/') && depth
) {
330 error("%s: ignoring relative alternate object store %s",
331 relative_base
, last
);
333 link_alt_odb_entry(last
, cp
- last
,
334 relative_base
, depth
);
337 while (cp
< ep
&& *cp
== sep
)
343 static void read_info_alternates(const char * relative_base
, int depth
)
350 sprintf(path
, "%s/info/alternates", relative_base
);
351 fd
= open(path
, O_RDONLY
);
354 if (fstat(fd
, &st
) || (st
.st_size
== 0)) {
358 map
= mmap(NULL
, st
.st_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
360 if (map
== MAP_FAILED
)
363 link_alt_odb_entries(map
, map
+ st
.st_size
, '\n', relative_base
, depth
);
365 munmap(map
, st
.st_size
);
368 void prepare_alt_odb(void)
372 alt
= getenv(ALTERNATE_DB_ENVIRONMENT
);
377 alt_odb_tail
= &alt_odb_list
;
378 link_alt_odb_entries(alt
, alt
+ strlen(alt
), ':', NULL
, 0);
380 read_info_alternates(get_object_directory(), 0);
383 static char *find_sha1_file(const unsigned char *sha1
, struct stat
*st
)
385 char *name
= sha1_file_name(sha1
);
386 struct alternate_object_database
*alt
;
391 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
393 fill_sha1_path(name
, sha1
);
394 if (!stat(alt
->base
, st
))
400 #define PACK_MAX_SZ (1<<26)
401 static int pack_used_ctr
;
402 static unsigned long pack_mapped
;
403 struct packed_git
*packed_git
;
405 static int check_packed_git_idx(const char *path
, struct packed_git
*p
)
408 struct pack_idx_header
*hdr
;
409 unsigned long idx_size
;
410 unsigned int version
, nr
, i
, *index
;
411 int fd
= open(path
, O_RDONLY
);
416 if (fstat(fd
, &st
)) {
420 idx_size
= st
.st_size
;
421 idx_map
= mmap(NULL
, idx_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
423 if (idx_map
== MAP_FAILED
)
427 if (hdr
->idx_signature
== htonl(PACK_IDX_SIGNATURE
)) {
428 version
= ntohl(hdr
->idx_version
);
429 if (version
< 2 || version
> 2) {
430 munmap(idx_map
, idx_size
);
431 return error("index file %s is version %d"
432 " and is not supported by this binary"
433 " (try upgrading GIT to a newer version)",
442 index
+= 2; /* skip index header */
443 for (i
= 0; i
< 256; i
++) {
444 unsigned int n
= ntohl(index
[i
]);
446 return error("non-monotonic index");
453 * - 256 index entries 4 bytes each
454 * - 24-byte entries * nr (20-byte sha1 + 4-byte offset)
455 * - 20-byte SHA1 of the packfile
456 * - 20-byte SHA1 file checksum
458 if (idx_size
!= 4*256 + nr
* 24 + 20 + 20) {
459 munmap(idx_map
, idx_size
);
460 return error("wrong index file size in %s", path
);
462 } else if (version
== 2) {
465 * - 8 bytes of header
466 * - 256 index entries 4 bytes each
467 * - 20-byte sha1 entry * nr
468 * - 4-byte crc entry * nr
469 * - 4-byte offset entry * nr
470 * - 20-byte SHA1 of the packfile
471 * - 20-byte SHA1 file checksum
472 * And after the 4-byte offset table might be a
473 * variable sized table containing 8-byte entries
474 * for offsets larger than 2^31.
476 unsigned long min_size
= 8 + 4*256 + nr
*(20 + 4 + 4) + 20 + 20;
477 if (idx_size
< min_size
|| idx_size
> min_size
+ (nr
- 1)*8) {
478 munmap(idx_map
, idx_size
);
479 return error("wrong index file size in %s", path
);
481 if (idx_size
!= min_size
) {
482 /* make sure we can deal with large pack offsets */
483 if (sizeof(unsigned long) <= 4) {
484 munmap(idx_map
, idx_size
);
485 return error("pack %s too large -- please upgrade your git version", path
);
490 p
->index_version
= version
;
491 p
->index_data
= idx_map
;
492 p
->index_size
= idx_size
;
497 static int unuse_one_packed_git(void)
499 struct packed_git
*p
, *lru
= NULL
;
501 for (p
= packed_git
; p
; p
= p
->next
) {
502 if (p
->pack_use_cnt
|| !p
->pack_base
)
504 if (!lru
|| p
->pack_last_used
< lru
->pack_last_used
)
509 munmap(lru
->pack_base
, lru
->pack_size
);
510 lru
->pack_base
= NULL
;
514 void unuse_packed_git(struct packed_git
*p
)
519 int use_packed_git(struct packed_git
*p
)
523 /* We created the struct before we had the pack */
524 stat(p
->pack_name
, &st
);
525 if (!S_ISREG(st
.st_mode
))
526 die("packfile %s not a regular file", p
->pack_name
);
527 p
->pack_size
= st
.st_size
;
533 struct pack_header
*hdr
;
535 pack_mapped
+= p
->pack_size
;
536 while (PACK_MAX_SZ
< pack_mapped
&& unuse_one_packed_git())
538 fd
= open(p
->pack_name
, O_RDONLY
);
540 die("packfile %s cannot be opened", p
->pack_name
);
541 if (fstat(fd
, &st
)) {
543 die("packfile %s cannot be opened", p
->pack_name
);
545 if (st
.st_size
!= p
->pack_size
)
546 die("packfile %s size mismatch.", p
->pack_name
);
547 map
= mmap(NULL
, p
->pack_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
549 if (map
== MAP_FAILED
)
550 die("packfile %s cannot be mapped.", p
->pack_name
);
553 /* Check if we understand this pack file. If we don't we're
554 * likely too old to handle it.
557 if (hdr
->hdr_signature
!= htonl(PACK_SIGNATURE
))
558 die("packfile %s isn't actually a pack.", p
->pack_name
);
559 if (!pack_version_ok(hdr
->hdr_version
))
560 die("packfile %s is version %i and not supported"
561 " (try upgrading GIT to a newer version)",
562 p
->pack_name
, ntohl(hdr
->hdr_version
));
564 /* Check if the pack file matches with the index file.
567 if (hashcmp((unsigned char *)(p
->index_data
) +
569 (unsigned char *)p
->pack_base
+
570 p
->pack_size
- 20)) {
571 die("packfile %s does not match index.", p
->pack_name
);
574 p
->pack_last_used
= pack_used_ctr
++;
579 struct packed_git
*add_packed_git(char *path
, int path_len
, int local
)
582 struct packed_git
*p
= xmalloc(sizeof(*p
) + path_len
+ 2);
585 * Make sure a corresponding .pack file exists and that
586 * the index looks sane.
588 path_len
-= strlen(".idx");
591 memcpy(p
->pack_name
, path
, path_len
);
592 strcpy(p
->pack_name
+ path_len
, ".pack");
593 if (stat(p
->pack_name
, &st
) || !S_ISREG(st
.st_mode
) ||
594 check_packed_git_idx(path
, p
)) {
599 /* ok, it looks sane as far as we can check without
600 * actually mapping the pack file.
602 p
->pack_size
= st
.st_size
;
605 p
->pack_last_used
= 0;
607 p
->pack_local
= local
;
608 if (path_len
< 40 || get_sha1_hex(path
+ path_len
- 40, p
->sha1
))
613 struct packed_git
*parse_pack_index(unsigned char *sha1
)
615 char *path
= sha1_pack_index_name(sha1
);
616 return parse_pack_index_file(sha1
, path
);
619 struct packed_git
*parse_pack_index_file(const unsigned char *sha1
,
620 const char *idx_path
)
622 const char *path
= sha1_pack_name(sha1
);
623 struct packed_git
*p
= xmalloc(sizeof(*p
) + strlen(path
) + 2);
625 if (check_packed_git_idx(idx_path
, p
)) {
630 strcpy(p
->pack_name
, path
);
634 p
->pack_last_used
= 0;
636 hashcpy(p
->sha1
, sha1
);
640 void install_packed_git(struct packed_git
*pack
)
642 pack
->next
= packed_git
;
646 static void prepare_packed_git_one(char *objdir
, int local
)
653 sprintf(path
, "%s/pack", objdir
);
658 error("unable to open object pack directory: %s: %s",
659 path
, strerror(errno
));
663 while ((de
= readdir(dir
)) != NULL
) {
664 int namelen
= strlen(de
->d_name
);
665 struct packed_git
*p
;
667 if (!has_extension(de
->d_name
, ".idx"))
670 /* we have .idx. Is it a file we can map? */
671 strcpy(path
+ len
, de
->d_name
);
672 for (p
= packed_git
; p
; p
= p
->next
) {
673 if (!memcmp(path
, p
->pack_name
, len
+ namelen
- 4))
678 p
= add_packed_git(path
, len
+ namelen
, local
);
681 p
->next
= packed_git
;
687 static int prepare_packed_git_run_once
= 0;
688 void prepare_packed_git(void)
690 struct alternate_object_database
*alt
;
692 if (prepare_packed_git_run_once
)
694 prepare_packed_git_one(get_object_directory(), 1);
696 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
698 prepare_packed_git_one(alt
->base
, 0);
701 prepare_packed_git_run_once
= 1;
704 void reprepare_packed_git(void)
706 prepare_packed_git_run_once
= 0;
707 prepare_packed_git();
710 int check_sha1_signature(const unsigned char *sha1
, void *map
, unsigned long size
, const char *type
)
712 unsigned char real_sha1
[20];
713 hash_sha1_file(map
, size
, type
, real_sha1
);
714 return hashcmp(sha1
, real_sha1
) ? -1 : 0;
717 void *map_sha1_file(const unsigned char *sha1
, unsigned long *size
)
722 char *filename
= find_sha1_file(sha1
, &st
);
728 fd
= open(filename
, O_RDONLY
| sha1_file_open_flag
);
730 /* See if it works without O_NOATIME */
731 switch (sha1_file_open_flag
) {
733 fd
= open(filename
, O_RDONLY
);
741 /* If it failed once, it will probably fail again.
742 * Stop using O_NOATIME
744 sha1_file_open_flag
= 0;
746 map
= mmap(NULL
, st
.st_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
748 if (map
== MAP_FAILED
)
754 int legacy_loose_object(unsigned char *map
)
759 * Is it a zlib-compressed buffer? If so, the first byte
760 * must be 0x78 (15-bit window size, deflated), and the
761 * first 16-bit word is evenly divisible by 31
763 word
= (map
[0] << 8) + map
[1];
764 if (map
[0] == 0x78 && !(word
% 31))
770 unsigned long unpack_object_header_gently(const unsigned char *buf
, unsigned long len
, enum object_type
*type
, unsigned long *sizep
)
775 unsigned long used
= 0;
778 *type
= (c
>> 4) & 7;
784 if (sizeof(long) * 8 <= shift
)
787 size
+= (c
& 0x7f) << shift
;
794 static int unpack_sha1_header(z_stream
*stream
, unsigned char *map
, unsigned long mapsize
, void *buffer
, unsigned long bufsiz
)
796 unsigned long size
, used
;
797 static const char valid_loose_object_type
[8] = {
799 1, 1, 1, 1, /* "commit", "tree", "blob", "tag" */
800 0, /* "delta" and others are invalid in a loose object */
802 enum object_type type
;
804 /* Get the data stream */
805 memset(stream
, 0, sizeof(*stream
));
806 stream
->next_in
= map
;
807 stream
->avail_in
= mapsize
;
808 stream
->next_out
= buffer
;
809 stream
->avail_out
= bufsiz
;
811 if (legacy_loose_object(map
)) {
813 return inflate(stream
, 0);
816 used
= unpack_object_header_gently(map
, mapsize
, &type
, &size
);
817 if (!used
|| !valid_loose_object_type
[type
])
822 /* Set up the stream for the rest.. */
823 stream
->next_in
= map
;
824 stream
->avail_in
= mapsize
;
827 /* And generate the fake traditional header */
828 stream
->total_out
= 1 + snprintf(buffer
, bufsiz
, "%s %lu",
829 type_names
[type
], size
);
833 static void *unpack_sha1_rest(z_stream
*stream
, void *buffer
, unsigned long size
)
835 int bytes
= strlen(buffer
) + 1;
836 unsigned char *buf
= xmalloc(1+size
);
839 n
= stream
->total_out
- bytes
;
842 memcpy(buf
, (char *) buffer
+ bytes
, n
);
845 stream
->next_out
= buf
+ bytes
;
846 stream
->avail_out
= size
- bytes
;
847 while (inflate(stream
, Z_FINISH
) == Z_OK
)
856 * We used to just use "sscanf()", but that's actually way
857 * too permissive for what we want to check. So do an anal
858 * object header parse by hand.
860 static int parse_sha1_header(char *hdr
, char *type
, unsigned long *sizep
)
866 * The type can be at most ten bytes (including the
867 * terminating '\0' that we add), and is followed by
882 * The length must follow immediately, and be in canonical
883 * decimal format (ie "010" is not valid).
890 unsigned long c
= *hdr
- '0';
894 size
= size
* 10 + c
;
900 * The length must be followed by a zero byte
902 return *hdr
? -1 : 0;
905 void * unpack_sha1_file(void *map
, unsigned long mapsize
, char *type
, unsigned long *size
)
911 ret
= unpack_sha1_header(&stream
, map
, mapsize
, hdr
, sizeof(hdr
));
912 if (ret
< Z_OK
|| parse_sha1_header(hdr
, type
, size
) < 0)
915 return unpack_sha1_rest(&stream
, hdr
, *size
);
918 static unsigned long get_delta_base(struct packed_git
*p
,
919 unsigned long offset
,
920 enum object_type kind
,
921 unsigned long delta_obj_offset
,
922 unsigned long *base_obj_offset
)
924 unsigned char *base_info
= (unsigned char *) p
->pack_base
+ offset
;
925 unsigned long base_offset
;
927 /* there must be at least 20 bytes left regardless of delta type */
928 if (p
->pack_size
<= offset
+ 20)
929 die("truncated pack file");
931 if (kind
== OBJ_OFS_DELTA
) {
933 unsigned char c
= base_info
[used
++];
934 base_offset
= c
& 127;
937 if (!base_offset
|| base_offset
& ~(~0UL >> 7))
938 die("offset value overflow for delta base object");
939 c
= base_info
[used
++];
940 base_offset
= (base_offset
<< 7) + (c
& 127);
942 base_offset
= delta_obj_offset
- base_offset
;
943 if (base_offset
>= delta_obj_offset
)
944 die("delta base offset out of bound");
946 } else if (kind
== OBJ_REF_DELTA
) {
947 /* The base entry _must_ be in the same pack */
948 base_offset
= find_pack_entry_one(base_info
, p
);
950 die("failed to find delta-pack base object %s",
951 sha1_to_hex(base_info
));
954 die("I am totally screwed");
955 *base_obj_offset
= base_offset
;
959 /* forward declaration for a mutually recursive function */
960 static int packed_object_info(struct packed_git
*p
, unsigned long offset
,
961 char *type
, unsigned long *sizep
);
963 static int packed_delta_info(struct packed_git
*p
,
964 unsigned long offset
,
965 enum object_type kind
,
966 unsigned long obj_offset
,
968 unsigned long *sizep
)
970 unsigned long base_offset
;
972 offset
= get_delta_base(p
, offset
, kind
, obj_offset
, &base_offset
);
974 /* We choose to only get the type of the base object and
975 * ignore potentially corrupt pack file that expects the delta
976 * based on a base with a wrong size. This saves tons of
979 if (packed_object_info(p
, base_offset
, type
, NULL
))
980 die("cannot get info for delta-pack base");
983 const unsigned char *data
;
984 unsigned char delta_head
[20];
985 unsigned long result_size
;
989 memset(&stream
, 0, sizeof(stream
));
991 stream
.next_in
= (unsigned char *) p
->pack_base
+ offset
;
992 stream
.avail_in
= p
->pack_size
- offset
;
993 stream
.next_out
= delta_head
;
994 stream
.avail_out
= sizeof(delta_head
);
996 inflateInit(&stream
);
997 st
= inflate(&stream
, Z_FINISH
);
999 if ((st
!= Z_STREAM_END
) &&
1000 stream
.total_out
!= sizeof(delta_head
))
1001 die("delta data unpack-initial failed");
1003 /* Examine the initial part of the delta to figure out
1008 /* ignore base size */
1009 get_delta_hdr_size(&data
, delta_head
+sizeof(delta_head
));
1011 /* Read the result size */
1012 result_size
= get_delta_hdr_size(&data
, delta_head
+sizeof(delta_head
));
1013 *sizep
= result_size
;
1018 static unsigned long unpack_object_header(struct packed_git
*p
, unsigned long offset
,
1019 enum object_type
*type
, unsigned long *sizep
)
1023 if (p
->pack_size
<= offset
)
1024 die("object offset outside of pack file");
1026 used
= unpack_object_header_gently((unsigned char *)p
->pack_base
+
1028 p
->pack_size
- offset
, type
, sizep
);
1030 die("object offset outside of pack file");
1032 return offset
+ used
;
1035 void packed_object_info_detail(struct packed_git
*p
,
1036 unsigned long offset
,
1038 unsigned long *size
,
1039 unsigned long *store_size
,
1040 unsigned int *delta_chain_length
,
1041 unsigned char *base_sha1
)
1043 unsigned long obj_offset
, val
;
1044 unsigned char *next_sha1
;
1045 enum object_type kind
;
1047 *delta_chain_length
= 0;
1048 obj_offset
= offset
;
1049 offset
= unpack_object_header(p
, offset
, &kind
, size
);
1054 die("corrupted pack file %s containing object of kind %d",
1055 p
->pack_name
, kind
);
1060 strcpy(type
, type_names
[kind
]);
1061 *store_size
= 0; /* notyet */
1064 get_delta_base(p
, offset
, kind
, obj_offset
, &offset
);
1065 if (*delta_chain_length
== 0) {
1066 /* TODO: find base_sha1 as pointed by offset */
1070 if (p
->pack_size
<= offset
+ 20)
1071 die("pack file %s records an incomplete delta base",
1073 next_sha1
= (unsigned char *) p
->pack_base
+ offset
;
1074 if (*delta_chain_length
== 0)
1075 hashcpy(base_sha1
, next_sha1
);
1076 offset
= find_pack_entry_one(next_sha1
, p
);
1079 obj_offset
= offset
;
1080 offset
= unpack_object_header(p
, offset
, &kind
, &val
);
1081 (*delta_chain_length
)++;
1085 static int packed_object_info(struct packed_git
*p
, unsigned long offset
,
1086 char *type
, unsigned long *sizep
)
1088 unsigned long size
, obj_offset
= offset
;
1089 enum object_type kind
;
1091 offset
= unpack_object_header(p
, offset
, &kind
, &size
);
1096 return packed_delta_info(p
, offset
, kind
, obj_offset
, type
, sizep
);
1101 strcpy(type
, type_names
[kind
]);
1104 die("corrupted pack file %s containing object of kind %d",
1105 p
->pack_name
, kind
);
1112 static void *unpack_compressed_entry(struct packed_git
*p
,
1113 unsigned long offset
,
1118 unsigned char *buffer
;
1120 buffer
= xmalloc(size
+ 1);
1122 memset(&stream
, 0, sizeof(stream
));
1123 stream
.next_in
= (unsigned char*)p
->pack_base
+ offset
;
1124 stream
.avail_in
= p
->pack_size
- offset
;
1125 stream
.next_out
= buffer
;
1126 stream
.avail_out
= size
;
1128 inflateInit(&stream
);
1129 st
= inflate(&stream
, Z_FINISH
);
1130 inflateEnd(&stream
);
1131 if ((st
!= Z_STREAM_END
) || stream
.total_out
!= size
) {
1139 static void *unpack_delta_entry(struct packed_git
*p
,
1140 unsigned long offset
,
1141 unsigned long delta_size
,
1142 enum object_type kind
,
1143 unsigned long obj_offset
,
1145 unsigned long *sizep
)
1147 void *delta_data
, *result
, *base
;
1148 unsigned long result_size
, base_size
, base_offset
;
1150 offset
= get_delta_base(p
, offset
, kind
, obj_offset
, &base_offset
);
1151 base
= unpack_entry_gently(p
, base_offset
, type
, &base_size
);
1153 die("failed to read delta base object at %lu from %s",
1154 base_offset
, p
->pack_name
);
1156 delta_data
= unpack_compressed_entry(p
, offset
, delta_size
);
1157 result
= patch_delta(base
, base_size
,
1158 delta_data
, delta_size
,
1161 die("failed to apply delta");
1164 *sizep
= result_size
;
1168 static void *unpack_entry(struct pack_entry
*entry
,
1169 char *type
, unsigned long *sizep
)
1171 struct packed_git
*p
= entry
->p
;
1174 if (use_packed_git(p
))
1175 die("cannot map packed file");
1176 retval
= unpack_entry_gently(p
, entry
->offset
, type
, sizep
);
1177 unuse_packed_git(p
);
1179 die("corrupted pack file %s", p
->pack_name
);
1183 /* The caller is responsible for use_packed_git()/unuse_packed_git() pair */
1184 void *unpack_entry_gently(struct packed_git
*p
, unsigned long offset
,
1185 char *type
, unsigned long *sizep
)
1187 unsigned long size
, obj_offset
= offset
;
1188 enum object_type kind
;
1190 offset
= unpack_object_header(p
, offset
, &kind
, &size
);
1194 return unpack_delta_entry(p
, offset
, size
, kind
, obj_offset
, type
, sizep
);
1199 strcpy(type
, type_names
[kind
]);
1201 return unpack_compressed_entry(p
, offset
, size
);
1207 const unsigned char *nth_packed_object_sha1(const struct packed_git
*p
,
1210 const unsigned char *index
= p
->index_data
;
1211 if (n
>= p
->num_objects
)
1214 if (p
->index_version
== 1) {
1215 return index
+ 24 * n
+ 4;
1218 return index
+ 20 * n
;
1222 static off_t
nth_packed_object_offset(const struct packed_git
*p
, uint32_t n
)
1224 const unsigned char *index
= p
->index_data
;
1226 if (p
->index_version
== 1) {
1227 return ntohl(*((uint32_t *)(index
+ 24 * n
)));
1230 index
+= 8 + p
->num_objects
* (20 + 4);
1231 off
= ntohl(*((uint32_t *)(index
+ 4 * n
)));
1232 if (!(off
& 0x80000000))
1234 index
+= p
->num_objects
* 4 + (off
& 0x7fffffff) * 8;
1235 return (((uint64_t)ntohl(*((uint32_t *)(index
+ 0)))) << 32) |
1236 ntohl(*((uint32_t *)(index
+ 4)));
1240 unsigned long find_pack_entry_one(const unsigned char *sha1
,
1241 struct packed_git
*p
)
1243 const unsigned int *level1_ofs
= p
->index_data
;
1244 const unsigned char *index
= p
->index_data
;
1247 if (p
->index_version
> 1) {
1252 hi
= ntohl(level1_ofs
[*sha1
]);
1253 lo
= ((*sha1
== 0x0) ? 0 : ntohl(level1_ofs
[*sha1
- 1]));
1256 unsigned mi
= (lo
+ hi
) / 2;
1257 unsigned x
= (p
->index_version
> 1) ? (mi
* 20) : (mi
* 24 + 4);
1258 int cmp
= hashcmp(index
+ x
, sha1
);
1260 return nth_packed_object_offset(p
, mi
);
1269 static int matches_pack_name(struct packed_git
*p
, const char *ig
)
1271 const char *last_c
, *c
;
1273 if (!strcmp(p
->pack_name
, ig
))
1276 for (c
= p
->pack_name
, last_c
= c
; *c
;)
1281 if (!strcmp(last_c
, ig
))
1287 static int find_pack_entry(const unsigned char *sha1
, struct pack_entry
*e
, const char **ignore_packed
)
1289 struct packed_git
*p
;
1290 unsigned long offset
;
1292 prepare_packed_git();
1294 for (p
= packed_git
; p
; p
= p
->next
) {
1295 if (ignore_packed
) {
1297 for (ig
= ignore_packed
; *ig
; ig
++)
1298 if (!matches_pack_name(p
, *ig
))
1303 offset
= find_pack_entry_one(sha1
, p
);
1307 hashcpy(e
->sha1
, sha1
);
1314 struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
1315 struct packed_git
*packs
)
1317 struct packed_git
*p
;
1319 for (p
= packs
; p
; p
= p
->next
) {
1320 if (find_pack_entry_one(sha1
, p
))
1327 int sha1_object_info(const unsigned char *sha1
, char *type
, unsigned long *sizep
)
1330 unsigned long mapsize
, size
;
1335 map
= map_sha1_file(sha1
, &mapsize
);
1337 struct pack_entry e
;
1339 if (!find_pack_entry(sha1
, &e
, NULL
)) {
1340 reprepare_packed_git();
1341 if (!find_pack_entry(sha1
, &e
, NULL
))
1342 return error("unable to find %s", sha1_to_hex(sha1
));
1344 if (use_packed_git(e
.p
))
1345 die("cannot map packed file");
1346 status
= packed_object_info(e
.p
, e
.offset
, type
, sizep
);
1347 unuse_packed_git(e
.p
);
1350 if (unpack_sha1_header(&stream
, map
, mapsize
, hdr
, sizeof(hdr
)) < 0)
1351 status
= error("unable to unpack %s header",
1353 if (parse_sha1_header(hdr
, type
, &size
) < 0)
1354 status
= error("unable to parse %s header", sha1_to_hex(sha1
));
1360 inflateEnd(&stream
);
1361 munmap(map
, mapsize
);
1365 static void *read_packed_sha1(const unsigned char *sha1
, char *type
, unsigned long *size
)
1367 struct pack_entry e
;
1369 if (!find_pack_entry(sha1
, &e
, NULL
)) {
1370 error("cannot read sha1_file for %s", sha1_to_hex(sha1
));
1373 return unpack_entry(&e
, type
, size
);
1376 void * read_sha1_file(const unsigned char *sha1
, char *type
, unsigned long *size
)
1378 unsigned long mapsize
;
1380 struct pack_entry e
;
1382 if (find_pack_entry(sha1
, &e
, NULL
))
1383 return read_packed_sha1(sha1
, type
, size
);
1384 map
= map_sha1_file(sha1
, &mapsize
);
1386 buf
= unpack_sha1_file(map
, mapsize
, type
, size
);
1387 munmap(map
, mapsize
);
1390 reprepare_packed_git();
1391 if (find_pack_entry(sha1
, &e
, NULL
))
1392 return read_packed_sha1(sha1
, type
, size
);
1396 void *read_object_with_reference(const unsigned char *sha1
,
1397 const char *required_type
,
1398 unsigned long *size
,
1399 unsigned char *actual_sha1_return
)
1403 unsigned long isize
;
1404 unsigned char actual_sha1
[20];
1406 hashcpy(actual_sha1
, sha1
);
1408 int ref_length
= -1;
1409 const char *ref_type
= NULL
;
1411 buffer
= read_sha1_file(actual_sha1
, type
, &isize
);
1414 if (!strcmp(type
, required_type
)) {
1416 if (actual_sha1_return
)
1417 hashcpy(actual_sha1_return
, actual_sha1
);
1420 /* Handle references */
1421 else if (!strcmp(type
, commit_type
))
1423 else if (!strcmp(type
, tag_type
))
1424 ref_type
= "object ";
1429 ref_length
= strlen(ref_type
);
1431 if (memcmp(buffer
, ref_type
, ref_length
) ||
1432 get_sha1_hex((char *) buffer
+ ref_length
, actual_sha1
)) {
1437 /* Now we have the ID of the referred-to object in
1438 * actual_sha1. Check again. */
1442 static void write_sha1_file_prepare(void *buf
, unsigned long len
,
1443 const char *type
, unsigned char *sha1
,
1444 unsigned char *hdr
, int *hdrlen
)
1448 /* Generate the header */
1449 *hdrlen
= sprintf((char *)hdr
, "%s %lu", type
, len
)+1;
1453 SHA1_Update(&c
, hdr
, *hdrlen
);
1454 SHA1_Update(&c
, buf
, len
);
1455 SHA1_Final(sha1
, &c
);
1459 * Link the tempfile to the final place, possibly creating the
1460 * last directory level as you do so.
1462 * Returns the errno on failure, 0 on success.
1464 static int link_temp_to_file(const char *tmpfile
, const char *filename
)
1469 if (!link(tmpfile
, filename
))
1473 * Try to mkdir the last path component if that failed.
1475 * Re-try the "link()" regardless of whether the mkdir
1476 * succeeds, since a race might mean that somebody
1480 dir
= strrchr(filename
, '/');
1483 if (!mkdir(filename
, 0777) && adjust_shared_perm(filename
)) {
1488 if (!link(tmpfile
, filename
))
1496 * Move the just written object into its final resting place
1498 int move_temp_to_file(const char *tmpfile
, const char *filename
)
1500 int ret
= link_temp_to_file(tmpfile
, filename
);
1503 * Coda hack - coda doesn't like cross-directory links,
1504 * so we fall back to a rename, which will mean that it
1505 * won't be able to check collisions, but that's not a
1508 * The same holds for FAT formatted media.
1510 * When this succeeds, we just return 0. We have nothing
1513 if (ret
&& ret
!= EEXIST
) {
1514 if (!rename(tmpfile
, filename
))
1520 if (ret
!= EEXIST
) {
1521 return error("unable to write sha1 filename %s: %s\n", filename
, strerror(ret
));
1523 /* FIXME!!! Collision check here ? */
1529 static int write_buffer(int fd
, const void *buf
, size_t len
)
1534 size
= write(fd
, buf
, len
);
1536 return error("file write: disk full");
1538 if (errno
== EINTR
|| errno
== EAGAIN
)
1540 return error("file write error (%s)", strerror(errno
));
1543 buf
= (char *) buf
+ size
;
1548 static int write_binary_header(unsigned char *hdr
, enum object_type type
, unsigned long len
)
1553 c
= (type
<< 4) | (len
& 15);
1566 static void setup_object_header(z_stream
*stream
, const char *type
, unsigned long len
)
1570 if (use_legacy_headers
) {
1571 while (deflate(stream
, 0) == Z_OK
)
1575 if (!strcmp(type
, blob_type
))
1576 obj_type
= OBJ_BLOB
;
1577 else if (!strcmp(type
, tree_type
))
1578 obj_type
= OBJ_TREE
;
1579 else if (!strcmp(type
, commit_type
))
1580 obj_type
= OBJ_COMMIT
;
1581 else if (!strcmp(type
, tag_type
))
1584 die("trying to generate bogus object of type '%s'", type
);
1585 hdr
= write_binary_header(stream
->next_out
, obj_type
, len
);
1586 stream
->total_out
= hdr
;
1587 stream
->next_out
+= hdr
;
1588 stream
->avail_out
-= hdr
;
1591 int hash_sha1_file(void *buf
, unsigned long len
, const char *type
,
1592 unsigned char *sha1
)
1594 unsigned char hdr
[50];
1596 write_sha1_file_prepare(buf
, len
, type
, sha1
, hdr
, &hdrlen
);
1600 int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *returnsha1
)
1603 unsigned char *compressed
;
1605 unsigned char sha1
[20];
1607 static char tmpfile
[PATH_MAX
];
1608 unsigned char hdr
[50];
1611 /* Normally if we have it in the pack then we do not bother writing
1612 * it out into .git/objects/??/?{38} file.
1614 write_sha1_file_prepare(buf
, len
, type
, sha1
, hdr
, &hdrlen
);
1615 filename
= sha1_file_name(sha1
);
1617 hashcpy(returnsha1
, sha1
);
1618 if (has_sha1_file(sha1
))
1620 fd
= open(filename
, O_RDONLY
);
1623 * FIXME!!! We might do collision checking here, but we'd
1624 * need to uncompress the old file and check it. Later.
1630 if (errno
!= ENOENT
) {
1631 return error("sha1 file %s: %s\n", filename
, strerror(errno
));
1634 snprintf(tmpfile
, sizeof(tmpfile
), "%s/obj_XXXXXX", get_object_directory());
1636 fd
= mkstemp(tmpfile
);
1639 return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
1641 return error("unable to create temporary sha1 filename %s: %s\n", tmpfile
, strerror(errno
));
1645 memset(&stream
, 0, sizeof(stream
));
1646 deflateInit(&stream
, zlib_compression_level
);
1647 size
= 8 + deflateBound(&stream
, len
+hdrlen
);
1648 compressed
= xmalloc(size
);
1651 stream
.next_out
= compressed
;
1652 stream
.avail_out
= size
;
1654 /* First header.. */
1655 stream
.next_in
= hdr
;
1656 stream
.avail_in
= hdrlen
;
1657 setup_object_header(&stream
, type
, len
);
1659 /* Then the data itself.. */
1660 stream
.next_in
= buf
;
1661 stream
.avail_in
= len
;
1662 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1664 deflateEnd(&stream
);
1665 size
= stream
.total_out
;
1667 if (write_buffer(fd
, compressed
, size
) < 0)
1668 die("unable to write sha1 file");
1673 return move_temp_to_file(tmpfile
, filename
);
1677 * We need to unpack and recompress the object for writing
1678 * it out to a different file.
1680 static void *repack_object(const unsigned char *sha1
, unsigned long *objsize
)
1684 unsigned char *unpacked
;
1691 /* need to unpack and recompress it by itself */
1692 unpacked
= read_packed_sha1(sha1
, type
, &len
);
1694 hdrlen
= sprintf(hdr
, "%s %lu", type
, len
) + 1;
1697 memset(&stream
, 0, sizeof(stream
));
1698 deflateInit(&stream
, zlib_compression_level
);
1699 size
= deflateBound(&stream
, len
+ hdrlen
);
1700 buf
= xmalloc(size
);
1703 stream
.next_out
= buf
;
1704 stream
.avail_out
= size
;
1706 /* First header.. */
1707 stream
.next_in
= (void *)hdr
;
1708 stream
.avail_in
= hdrlen
;
1709 while (deflate(&stream
, 0) == Z_OK
)
1712 /* Then the data itself.. */
1713 stream
.next_in
= unpacked
;
1714 stream
.avail_in
= len
;
1715 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1717 deflateEnd(&stream
);
1720 *objsize
= stream
.total_out
;
1724 int write_sha1_to_fd(int fd
, const unsigned char *sha1
)
1727 unsigned long objsize
;
1728 void *buf
= map_sha1_file(sha1
, &objsize
);
1731 retval
= write_buffer(fd
, buf
, objsize
);
1732 munmap(buf
, objsize
);
1736 buf
= repack_object(sha1
, &objsize
);
1737 retval
= write_buffer(fd
, buf
, objsize
);
1742 int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
1743 size_t bufsize
, size_t *bufposn
)
1745 char tmpfile
[PATH_MAX
];
1748 unsigned char real_sha1
[20];
1749 unsigned char discard
[4096];
1753 snprintf(tmpfile
, sizeof(tmpfile
), "%s/obj_XXXXXX", get_object_directory());
1755 local
= mkstemp(tmpfile
);
1758 return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
1760 return error("unable to create temporary sha1 filename %s: %s\n", tmpfile
, strerror(errno
));
1763 memset(&stream
, 0, sizeof(stream
));
1765 inflateInit(&stream
);
1772 stream
.avail_in
= *bufposn
;
1773 stream
.next_in
= (unsigned char *) buffer
;
1775 stream
.next_out
= discard
;
1776 stream
.avail_out
= sizeof(discard
);
1777 ret
= inflate(&stream
, Z_SYNC_FLUSH
);
1778 SHA1_Update(&c
, discard
, sizeof(discard
) -
1780 } while (stream
.avail_in
&& ret
== Z_OK
);
1781 if (write_buffer(local
, buffer
, *bufposn
- stream
.avail_in
) < 0)
1782 die("unable to write sha1 file");
1783 memmove(buffer
, buffer
+ *bufposn
- stream
.avail_in
,
1785 *bufposn
= stream
.avail_in
;
1789 size
= read(fd
, buffer
+ *bufposn
, bufsize
- *bufposn
);
1794 return error("Connection closed?");
1795 perror("Reading from connection");
1800 inflateEnd(&stream
);
1803 SHA1_Final(real_sha1
, &c
);
1804 if (ret
!= Z_STREAM_END
) {
1806 return error("File %s corrupted", sha1_to_hex(sha1
));
1808 if (hashcmp(sha1
, real_sha1
)) {
1810 return error("File %s has bad hash", sha1_to_hex(sha1
));
1813 return move_temp_to_file(tmpfile
, sha1_file_name(sha1
));
1816 int has_pack_index(const unsigned char *sha1
)
1819 if (stat(sha1_pack_index_name(sha1
), &st
))
1824 int has_pack_file(const unsigned char *sha1
)
1827 if (stat(sha1_pack_name(sha1
), &st
))
1832 int has_sha1_pack(const unsigned char *sha1
, const char **ignore_packed
)
1834 struct pack_entry e
;
1835 return find_pack_entry(sha1
, &e
, ignore_packed
);
1838 int has_sha1_file(const unsigned char *sha1
)
1841 struct pack_entry e
;
1843 if (find_pack_entry(sha1
, &e
, NULL
))
1845 return find_sha1_file(sha1
, &st
) ? 1 : 0;
1849 * reads from fd as long as possible into a supplied buffer of size bytes.
1850 * If necessary the buffer's size is increased using realloc()
1852 * returns 0 if anything went fine and -1 otherwise
1854 * NOTE: both buf and size may change, but even when -1 is returned
1855 * you still have to free() it yourself.
1857 int read_pipe(int fd
, char** return_buf
, unsigned long* return_size
)
1859 char* buf
= *return_buf
;
1860 unsigned long size
= *return_size
;
1862 unsigned long off
= 0;
1865 iret
= xread(fd
, buf
+ off
, size
- off
);
1870 buf
= xrealloc(buf
, size
);
1883 int index_pipe(unsigned char *sha1
, int fd
, const char *type
, int write_object
)
1885 unsigned long size
= 4096;
1886 char *buf
= xmalloc(size
);
1889 if (read_pipe(fd
, &buf
, &size
)) {
1897 ret
= write_sha1_file(buf
, size
, type
, sha1
);
1899 ret
= hash_sha1_file(buf
, size
, type
, sha1
);
1904 int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, const char *type
)
1906 unsigned long size
= st
->st_size
;
1912 buf
= mmap(NULL
, size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
1914 if (buf
== MAP_FAILED
)
1920 ret
= write_sha1_file(buf
, size
, type
, sha1
);
1922 ret
= hash_sha1_file(buf
, size
, type
, sha1
);
1928 int index_path(unsigned char *sha1
, const char *path
, struct stat
*st
, int write_object
)
1933 switch (st
->st_mode
& S_IFMT
) {
1935 fd
= open(path
, O_RDONLY
);
1937 return error("open(\"%s\"): %s", path
,
1939 if (index_fd(sha1
, fd
, st
, write_object
, NULL
) < 0)
1940 return error("%s: failed to insert into database",
1944 target
= xmalloc(st
->st_size
+1);
1945 if (readlink(path
, target
, st
->st_size
+1) != st
->st_size
) {
1946 char *errstr
= strerror(errno
);
1948 return error("readlink(\"%s\"): %s", path
,
1952 hash_sha1_file(target
, st
->st_size
, blob_type
, sha1
);
1953 else if (write_sha1_file(target
, st
->st_size
, blob_type
, sha1
))
1954 return error("%s: failed to insert into database",
1959 return error("%s: unsupported file type", path
);