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 static int pack_used_ctr
;
401 static unsigned long pack_mapped
;
402 struct packed_git
*packed_git
;
404 static int check_packed_git_idx(const char *path
, unsigned long *idx_size_
,
409 unsigned long idx_size
;
411 int fd
= open(path
, O_RDONLY
);
415 if (fstat(fd
, &st
)) {
419 idx_size
= st
.st_size
;
420 idx_map
= mmap(NULL
, idx_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
422 if (idx_map
== MAP_FAILED
)
427 *idx_size_
= idx_size
;
429 /* check index map */
430 if (idx_size
< 4*256 + 20 + 20)
431 return error("index file too small");
433 for (i
= 0; i
< 256; i
++) {
434 unsigned int n
= ntohl(index
[i
]);
436 return error("non-monotonic index");
442 * - 256 index entries 4 bytes each
443 * - 24-byte entries * nr (20-byte sha1 + 4-byte offset)
444 * - 20-byte SHA1 of the packfile
445 * - 20-byte SHA1 file checksum
447 if (idx_size
!= 4*256 + nr
* 24 + 20 + 20)
448 return error("wrong index file size");
453 static int unuse_one_packed_git(void)
455 struct packed_git
*p
, *lru
= NULL
;
457 for (p
= packed_git
; p
; p
= p
->next
) {
458 if (!p
->windows
|| p
->windows
->inuse_cnt
)
460 if (!lru
|| p
->windows
->last_used
< lru
->windows
->last_used
)
465 munmap(lru
->windows
->base
, lru
->windows
->len
);
473 void unuse_pack(struct pack_window
**w_cursor
)
475 struct pack_window
*w
= *w_cursor
;
482 static void open_packed_git(struct packed_git
*p
)
485 struct pack_header hdr
;
486 unsigned char sha1
[20];
487 unsigned char *idx_sha1
;
489 p
->pack_fd
= open(p
->pack_name
, O_RDONLY
);
490 if (p
->pack_fd
< 0 || fstat(p
->pack_fd
, &st
))
491 die("packfile %s cannot be opened", p
->pack_name
);
493 /* If we created the struct before we had the pack we lack size. */
495 if (!S_ISREG(st
.st_mode
))
496 die("packfile %s not a regular file", p
->pack_name
);
497 p
->pack_size
= st
.st_size
;
498 } else if (p
->pack_size
!= st
.st_size
)
499 die("packfile %s size changed", p
->pack_name
);
501 /* Verify we recognize this pack file format. */
502 read_or_die(p
->pack_fd
, &hdr
, sizeof(hdr
));
503 if (hdr
.hdr_signature
!= htonl(PACK_SIGNATURE
))
504 die("file %s is not a GIT packfile", p
->pack_name
);
505 if (!pack_version_ok(hdr
.hdr_version
))
506 die("packfile %s is version %u and not supported"
507 " (try upgrading GIT to a newer version)",
508 p
->pack_name
, ntohl(hdr
.hdr_version
));
510 /* Verify the pack matches its index. */
511 if (num_packed_objects(p
) != ntohl(hdr
.hdr_entries
))
512 die("packfile %s claims to have %u objects"
513 " while index size indicates %u objects",
514 p
->pack_name
, ntohl(hdr
.hdr_entries
),
515 num_packed_objects(p
));
516 if (lseek(p
->pack_fd
, p
->pack_size
- sizeof(sha1
), SEEK_SET
) == -1)
517 die("end of packfile %s is unavailable", p
->pack_name
);
518 read_or_die(p
->pack_fd
, sha1
, sizeof(sha1
));
519 idx_sha1
= ((unsigned char *)p
->index_base
) + p
->index_size
- 40;
520 if (hashcmp(sha1
, idx_sha1
))
521 die("packfile %s does not match index", p
->pack_name
);
524 unsigned char* use_pack(struct packed_git
*p
,
525 struct pack_window
**w_cursor
,
526 unsigned long offset
,
529 struct pack_window
*win
= p
->windows
;
531 if (p
->pack_fd
== -1)
534 pack_mapped
+= p
->pack_size
;
535 while (packed_git_limit
< pack_mapped
&& unuse_one_packed_git())
537 win
= xcalloc(1, sizeof(*win
));
538 win
->len
= p
->pack_size
;
539 win
->base
= mmap(NULL
, p
->pack_size
, PROT_READ
, MAP_PRIVATE
, p
->pack_fd
, 0);
540 if (win
->base
== MAP_FAILED
)
541 die("packfile %s cannot be mapped.", p
->pack_name
);
544 if (win
!= *w_cursor
) {
545 win
->last_used
= pack_used_ctr
++;
550 *left
= win
->len
- offset
;
551 return win
->base
+ offset
;
554 struct packed_git
*add_packed_git(char *path
, int path_len
, int local
)
557 struct packed_git
*p
;
558 unsigned long idx_size
;
560 unsigned char sha1
[20];
562 if (check_packed_git_idx(path
, &idx_size
, &idx_map
))
565 /* do we have a corresponding .pack file? */
566 strcpy(path
+ path_len
- 4, ".pack");
567 if (stat(path
, &st
) || !S_ISREG(st
.st_mode
)) {
568 munmap(idx_map
, idx_size
);
571 /* ok, it looks sane as far as we can check without
572 * actually mapping the pack file.
574 p
= xmalloc(sizeof(*p
) + path_len
+ 2);
575 strcpy(p
->pack_name
, path
);
576 p
->index_size
= idx_size
;
577 p
->pack_size
= st
.st_size
;
578 p
->index_base
= idx_map
;
582 p
->pack_local
= local
;
583 if ((path_len
> 44) && !get_sha1_hex(path
+ path_len
- 44, sha1
))
584 hashcpy(p
->sha1
, sha1
);
588 struct packed_git
*parse_pack_index(unsigned char *sha1
)
590 char *path
= sha1_pack_index_name(sha1
);
591 return parse_pack_index_file(sha1
, path
);
594 struct packed_git
*parse_pack_index_file(const unsigned char *sha1
, char *idx_path
)
596 struct packed_git
*p
;
597 unsigned long idx_size
;
601 if (check_packed_git_idx(idx_path
, &idx_size
, &idx_map
))
604 path
= sha1_pack_name(sha1
);
606 p
= xmalloc(sizeof(*p
) + strlen(path
) + 2);
607 strcpy(p
->pack_name
, path
);
608 p
->index_size
= idx_size
;
610 p
->index_base
= idx_map
;
614 hashcpy(p
->sha1
, sha1
);
618 void install_packed_git(struct packed_git
*pack
)
620 pack
->next
= packed_git
;
624 static void prepare_packed_git_one(char *objdir
, int local
)
631 sprintf(path
, "%s/pack", objdir
);
636 error("unable to open object pack directory: %s: %s",
637 path
, strerror(errno
));
641 while ((de
= readdir(dir
)) != NULL
) {
642 int namelen
= strlen(de
->d_name
);
643 struct packed_git
*p
;
645 if (!has_extension(de
->d_name
, ".idx"))
648 /* we have .idx. Is it a file we can map? */
649 strcpy(path
+ len
, de
->d_name
);
650 for (p
= packed_git
; p
; p
= p
->next
) {
651 if (!memcmp(path
, p
->pack_name
, len
+ namelen
- 4))
656 p
= add_packed_git(path
, len
+ namelen
, local
);
659 p
->next
= packed_git
;
665 static int prepare_packed_git_run_once
= 0;
666 void prepare_packed_git(void)
668 struct alternate_object_database
*alt
;
670 if (prepare_packed_git_run_once
)
672 prepare_packed_git_one(get_object_directory(), 1);
674 for (alt
= alt_odb_list
; alt
; alt
= alt
->next
) {
676 prepare_packed_git_one(alt
->base
, 0);
679 prepare_packed_git_run_once
= 1;
682 void reprepare_packed_git(void)
684 prepare_packed_git_run_once
= 0;
685 prepare_packed_git();
688 int check_sha1_signature(const unsigned char *sha1
, void *map
, unsigned long size
, const char *type
)
690 unsigned char real_sha1
[20];
691 hash_sha1_file(map
, size
, type
, real_sha1
);
692 return hashcmp(sha1
, real_sha1
) ? -1 : 0;
695 void *map_sha1_file(const unsigned char *sha1
, unsigned long *size
)
700 char *filename
= find_sha1_file(sha1
, &st
);
706 fd
= open(filename
, O_RDONLY
| sha1_file_open_flag
);
708 /* See if it works without O_NOATIME */
709 switch (sha1_file_open_flag
) {
711 fd
= open(filename
, O_RDONLY
);
719 /* If it failed once, it will probably fail again.
720 * Stop using O_NOATIME
722 sha1_file_open_flag
= 0;
724 map
= mmap(NULL
, st
.st_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
726 if (map
== MAP_FAILED
)
732 int legacy_loose_object(unsigned char *map
)
737 * Is it a zlib-compressed buffer? If so, the first byte
738 * must be 0x78 (15-bit window size, deflated), and the
739 * first 16-bit word is evenly divisible by 31
741 word
= (map
[0] << 8) + map
[1];
742 if (map
[0] == 0x78 && !(word
% 31))
748 unsigned long unpack_object_header_gently(const unsigned char *buf
, unsigned long len
, enum object_type
*type
, unsigned long *sizep
)
753 unsigned long used
= 0;
756 *type
= (c
>> 4) & 7;
762 if (sizeof(long) * 8 <= shift
)
765 size
+= (c
& 0x7f) << shift
;
772 static int unpack_sha1_header(z_stream
*stream
, unsigned char *map
, unsigned long mapsize
, void *buffer
, unsigned long bufsiz
)
774 unsigned long size
, used
;
775 static const char valid_loose_object_type
[8] = {
777 1, 1, 1, 1, /* "commit", "tree", "blob", "tag" */
778 0, /* "delta" and others are invalid in a loose object */
780 enum object_type type
;
782 /* Get the data stream */
783 memset(stream
, 0, sizeof(*stream
));
784 stream
->next_in
= map
;
785 stream
->avail_in
= mapsize
;
786 stream
->next_out
= buffer
;
787 stream
->avail_out
= bufsiz
;
789 if (legacy_loose_object(map
)) {
791 return inflate(stream
, 0);
794 used
= unpack_object_header_gently(map
, mapsize
, &type
, &size
);
795 if (!used
|| !valid_loose_object_type
[type
])
800 /* Set up the stream for the rest.. */
801 stream
->next_in
= map
;
802 stream
->avail_in
= mapsize
;
805 /* And generate the fake traditional header */
806 stream
->total_out
= 1 + snprintf(buffer
, bufsiz
, "%s %lu",
807 type_names
[type
], size
);
811 static void *unpack_sha1_rest(z_stream
*stream
, void *buffer
, unsigned long size
)
813 int bytes
= strlen(buffer
) + 1;
814 unsigned char *buf
= xmalloc(1+size
);
817 n
= stream
->total_out
- bytes
;
820 memcpy(buf
, (char *) buffer
+ bytes
, n
);
823 stream
->next_out
= buf
+ bytes
;
824 stream
->avail_out
= size
- bytes
;
825 while (inflate(stream
, Z_FINISH
) == Z_OK
)
834 * We used to just use "sscanf()", but that's actually way
835 * too permissive for what we want to check. So do an anal
836 * object header parse by hand.
838 static int parse_sha1_header(char *hdr
, char *type
, unsigned long *sizep
)
844 * The type can be at most ten bytes (including the
845 * terminating '\0' that we add), and is followed by
860 * The length must follow immediately, and be in canonical
861 * decimal format (ie "010" is not valid).
868 unsigned long c
= *hdr
- '0';
872 size
= size
* 10 + c
;
878 * The length must be followed by a zero byte
880 return *hdr
? -1 : 0;
883 void * unpack_sha1_file(void *map
, unsigned long mapsize
, char *type
, unsigned long *size
)
889 ret
= unpack_sha1_header(&stream
, map
, mapsize
, hdr
, sizeof(hdr
));
890 if (ret
< Z_OK
|| parse_sha1_header(hdr
, type
, size
) < 0)
893 return unpack_sha1_rest(&stream
, hdr
, *size
);
896 static unsigned long get_delta_base(struct packed_git
*p
,
897 struct pack_window
**w_curs
,
898 unsigned long offset
,
899 enum object_type kind
,
900 unsigned long delta_obj_offset
,
901 unsigned long *base_obj_offset
)
903 unsigned char *base_info
= use_pack(p
, w_curs
, offset
, NULL
);
904 unsigned long base_offset
;
906 /* there must be at least 20 bytes left regardless of delta type */
907 if (p
->pack_size
<= offset
+ 20)
908 die("truncated pack file");
910 if (kind
== OBJ_OFS_DELTA
) {
912 unsigned char c
= base_info
[used
++];
913 base_offset
= c
& 127;
916 if (!base_offset
|| base_offset
& ~(~0UL >> 7))
917 die("offset value overflow for delta base object");
918 c
= base_info
[used
++];
919 base_offset
= (base_offset
<< 7) + (c
& 127);
921 base_offset
= delta_obj_offset
- base_offset
;
922 if (base_offset
>= delta_obj_offset
)
923 die("delta base offset out of bound");
925 } else if (kind
== OBJ_REF_DELTA
) {
926 /* The base entry _must_ be in the same pack */
927 base_offset
= find_pack_entry_one(base_info
, p
);
929 die("failed to find delta-pack base object %s",
930 sha1_to_hex(base_info
));
933 die("I am totally screwed");
934 *base_obj_offset
= base_offset
;
938 /* forward declaration for a mutually recursive function */
939 static int packed_object_info(struct packed_git
*p
, unsigned long offset
,
940 char *type
, unsigned long *sizep
);
942 static int packed_delta_info(struct packed_git
*p
,
943 struct pack_window
**w_curs
,
944 unsigned long offset
,
945 enum object_type kind
,
946 unsigned long obj_offset
,
948 unsigned long *sizep
)
950 unsigned long base_offset
;
952 offset
= get_delta_base(p
, w_curs
, offset
, kind
,
953 obj_offset
, &base_offset
);
955 /* We choose to only get the type of the base object and
956 * ignore potentially corrupt pack file that expects the delta
957 * based on a base with a wrong size. This saves tons of
960 if (packed_object_info(p
, base_offset
, type
, NULL
))
961 die("cannot get info for delta-pack base");
964 const unsigned char *data
;
965 unsigned char delta_head
[20], *in
;
966 unsigned long result_size
;
970 memset(&stream
, 0, sizeof(stream
));
971 stream
.next_out
= delta_head
;
972 stream
.avail_out
= sizeof(delta_head
);
974 inflateInit(&stream
);
976 in
= use_pack(p
, w_curs
, offset
, &stream
.avail_in
);
978 st
= inflate(&stream
, Z_FINISH
);
979 offset
+= stream
.next_in
- in
;
980 } while ((st
== Z_OK
|| st
== Z_BUF_ERROR
)
981 && stream
.total_out
< sizeof(delta_head
));
983 if ((st
!= Z_STREAM_END
) &&
984 stream
.total_out
!= sizeof(delta_head
))
985 die("delta data unpack-initial failed");
987 /* Examine the initial part of the delta to figure out
992 /* ignore base size */
993 get_delta_hdr_size(&data
, delta_head
+sizeof(delta_head
));
995 /* Read the result size */
996 result_size
= get_delta_hdr_size(&data
, delta_head
+sizeof(delta_head
));
997 *sizep
= result_size
;
1002 static unsigned long unpack_object_header(struct packed_git
*p
,
1003 struct pack_window
**w_curs
,
1004 unsigned long offset
,
1005 enum object_type
*type
,
1006 unsigned long *sizep
)
1008 unsigned char *base
;
1012 base
= use_pack(p
, w_curs
, offset
, &left
);
1013 used
= unpack_object_header_gently(base
, left
, type
, sizep
);
1015 die("object offset outside of pack file");
1017 return offset
+ used
;
1020 void packed_object_info_detail(struct packed_git
*p
,
1021 unsigned long offset
,
1023 unsigned long *size
,
1024 unsigned long *store_size
,
1025 unsigned int *delta_chain_length
,
1026 unsigned char *base_sha1
)
1028 struct pack_window
*w_curs
= NULL
;
1029 unsigned long obj_offset
, val
;
1030 unsigned char *next_sha1
;
1031 enum object_type kind
;
1033 *delta_chain_length
= 0;
1034 obj_offset
= offset
;
1035 offset
= unpack_object_header(p
, &w_curs
, offset
, &kind
, size
);
1040 die("pack %s contains unknown object type %d",
1041 p
->pack_name
, kind
);
1046 strcpy(type
, type_names
[kind
]);
1047 *store_size
= 0; /* notyet */
1048 unuse_pack(&w_curs
);
1051 get_delta_base(p
, &w_curs
, offset
, kind
,
1052 obj_offset
, &offset
);
1053 if (*delta_chain_length
== 0) {
1054 /* TODO: find base_sha1 as pointed by offset */
1058 next_sha1
= use_pack(p
, &w_curs
, offset
, NULL
);
1059 if (*delta_chain_length
== 0)
1060 hashcpy(base_sha1
, next_sha1
);
1061 offset
= find_pack_entry_one(next_sha1
, p
);
1064 obj_offset
= offset
;
1065 offset
= unpack_object_header(p
, &w_curs
, offset
, &kind
, &val
);
1066 (*delta_chain_length
)++;
1070 static int packed_object_info(struct packed_git
*p
, unsigned long offset
,
1071 char *type
, unsigned long *sizep
)
1073 struct pack_window
*w_curs
= NULL
;
1074 unsigned long size
, obj_offset
= offset
;
1075 enum object_type kind
;
1078 offset
= unpack_object_header(p
, &w_curs
, offset
, &kind
, &size
);
1083 r
= packed_delta_info(p
, &w_curs
, offset
, kind
,
1084 obj_offset
, type
, sizep
);
1085 unuse_pack(&w_curs
);
1091 strcpy(type
, type_names
[kind
]);
1092 unuse_pack(&w_curs
);
1095 die("pack %s contains unknown object type %d",
1096 p
->pack_name
, kind
);
1103 static void *unpack_compressed_entry(struct packed_git
*p
,
1104 struct pack_window
**w_curs
,
1105 unsigned long offset
,
1110 unsigned char *buffer
, *in
;
1112 buffer
= xmalloc(size
+ 1);
1114 memset(&stream
, 0, sizeof(stream
));
1115 stream
.next_out
= buffer
;
1116 stream
.avail_out
= size
;
1118 inflateInit(&stream
);
1120 in
= use_pack(p
, w_curs
, offset
, &stream
.avail_in
);
1121 stream
.next_in
= in
;
1122 st
= inflate(&stream
, Z_FINISH
);
1123 offset
+= stream
.next_in
- in
;
1124 } while (st
== Z_OK
|| st
== Z_BUF_ERROR
);
1125 inflateEnd(&stream
);
1126 if ((st
!= Z_STREAM_END
) || stream
.total_out
!= size
) {
1134 static void *unpack_delta_entry(struct packed_git
*p
,
1135 struct pack_window
**w_curs
,
1136 unsigned long offset
,
1137 unsigned long delta_size
,
1138 enum object_type kind
,
1139 unsigned long obj_offset
,
1141 unsigned long *sizep
)
1143 void *delta_data
, *result
, *base
;
1144 unsigned long result_size
, base_size
, base_offset
;
1146 offset
= get_delta_base(p
, w_curs
, offset
, kind
,
1147 obj_offset
, &base_offset
);
1148 base
= unpack_entry(p
, base_offset
, type
, &base_size
);
1150 die("failed to read delta base object at %lu from %s",
1151 base_offset
, p
->pack_name
);
1153 delta_data
= unpack_compressed_entry(p
, w_curs
, offset
, delta_size
);
1154 result
= patch_delta(base
, base_size
,
1155 delta_data
, delta_size
,
1158 die("failed to apply delta");
1161 *sizep
= result_size
;
1165 void *unpack_entry(struct packed_git
*p
, unsigned long offset
,
1166 char *type
, unsigned long *sizep
)
1168 struct pack_window
*w_curs
= NULL
;
1169 unsigned long size
, obj_offset
= offset
;
1170 enum object_type kind
;
1173 offset
= unpack_object_header(p
, &w_curs
, offset
, &kind
, &size
);
1177 retval
= unpack_delta_entry(p
, &w_curs
, offset
, size
,
1178 kind
, obj_offset
, type
, sizep
);
1184 strcpy(type
, type_names
[kind
]);
1186 retval
= unpack_compressed_entry(p
, &w_curs
, offset
, size
);
1189 die("unknown object type %i in %s", kind
, p
->pack_name
);
1191 unuse_pack(&w_curs
);
1195 int num_packed_objects(const struct packed_git
*p
)
1197 /* See check_packed_git_idx() */
1198 return (p
->index_size
- 20 - 20 - 4*256) / 24;
1201 int nth_packed_object_sha1(const struct packed_git
*p
, int n
,
1202 unsigned char* sha1
)
1204 void *index
= p
->index_base
+ 256;
1205 if (n
< 0 || num_packed_objects(p
) <= n
)
1207 hashcpy(sha1
, (unsigned char *) index
+ (24 * n
) + 4);
1211 unsigned long find_pack_entry_one(const unsigned char *sha1
,
1212 struct packed_git
*p
)
1214 unsigned int *level1_ofs
= p
->index_base
;
1215 int hi
= ntohl(level1_ofs
[*sha1
]);
1216 int lo
= ((*sha1
== 0x0) ? 0 : ntohl(level1_ofs
[*sha1
- 1]));
1217 void *index
= p
->index_base
+ 256;
1220 int mi
= (lo
+ hi
) / 2;
1221 int cmp
= hashcmp((unsigned char *)index
+ (24 * mi
) + 4, sha1
);
1223 return ntohl(*((unsigned int *) ((char *) index
+ (24 * mi
))));
1232 static int matches_pack_name(struct packed_git
*p
, const char *ig
)
1234 const char *last_c
, *c
;
1236 if (!strcmp(p
->pack_name
, ig
))
1239 for (c
= p
->pack_name
, last_c
= c
; *c
;)
1244 if (!strcmp(last_c
, ig
))
1250 static int find_pack_entry(const unsigned char *sha1
, struct pack_entry
*e
, const char **ignore_packed
)
1252 struct packed_git
*p
;
1253 unsigned long offset
;
1255 prepare_packed_git();
1257 for (p
= packed_git
; p
; p
= p
->next
) {
1258 if (ignore_packed
) {
1260 for (ig
= ignore_packed
; *ig
; ig
++)
1261 if (!matches_pack_name(p
, *ig
))
1266 offset
= find_pack_entry_one(sha1
, p
);
1270 hashcpy(e
->sha1
, sha1
);
1277 struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
1278 struct packed_git
*packs
)
1280 struct packed_git
*p
;
1282 for (p
= packs
; p
; p
= p
->next
) {
1283 if (find_pack_entry_one(sha1
, p
))
1290 static int sha1_loose_object_info(const unsigned char *sha1
, char *type
, unsigned long *sizep
)
1293 unsigned long mapsize
, size
;
1298 map
= map_sha1_file(sha1
, &mapsize
);
1300 return error("unable to find %s", sha1_to_hex(sha1
));
1301 if (unpack_sha1_header(&stream
, map
, mapsize
, hdr
, sizeof(hdr
)) < 0)
1302 status
= error("unable to unpack %s header",
1304 if (parse_sha1_header(hdr
, type
, &size
) < 0)
1305 status
= error("unable to parse %s header", sha1_to_hex(sha1
));
1311 inflateEnd(&stream
);
1312 munmap(map
, mapsize
);
1316 int sha1_object_info(const unsigned char *sha1
, char *type
, unsigned long *sizep
)
1318 struct pack_entry e
;
1320 if (!find_pack_entry(sha1
, &e
, NULL
)) {
1321 reprepare_packed_git();
1322 if (!find_pack_entry(sha1
, &e
, NULL
))
1323 return sha1_loose_object_info(sha1
, type
, sizep
);
1325 return packed_object_info(e
.p
, e
.offset
, type
, sizep
);
1328 static void *read_packed_sha1(const unsigned char *sha1
, char *type
, unsigned long *size
)
1330 struct pack_entry e
;
1332 if (!find_pack_entry(sha1
, &e
, NULL
)) {
1333 error("cannot read sha1_file for %s", sha1_to_hex(sha1
));
1336 return unpack_entry(e
.p
, e
.offset
, type
, size
);
1339 void * read_sha1_file(const unsigned char *sha1
, char *type
, unsigned long *size
)
1341 unsigned long mapsize
;
1343 struct pack_entry e
;
1345 if (find_pack_entry(sha1
, &e
, NULL
))
1346 return read_packed_sha1(sha1
, type
, size
);
1347 map
= map_sha1_file(sha1
, &mapsize
);
1349 buf
= unpack_sha1_file(map
, mapsize
, type
, size
);
1350 munmap(map
, mapsize
);
1353 reprepare_packed_git();
1354 if (find_pack_entry(sha1
, &e
, NULL
))
1355 return read_packed_sha1(sha1
, type
, size
);
1359 void *read_object_with_reference(const unsigned char *sha1
,
1360 const char *required_type
,
1361 unsigned long *size
,
1362 unsigned char *actual_sha1_return
)
1366 unsigned long isize
;
1367 unsigned char actual_sha1
[20];
1369 hashcpy(actual_sha1
, sha1
);
1371 int ref_length
= -1;
1372 const char *ref_type
= NULL
;
1374 buffer
= read_sha1_file(actual_sha1
, type
, &isize
);
1377 if (!strcmp(type
, required_type
)) {
1379 if (actual_sha1_return
)
1380 hashcpy(actual_sha1_return
, actual_sha1
);
1383 /* Handle references */
1384 else if (!strcmp(type
, commit_type
))
1386 else if (!strcmp(type
, tag_type
))
1387 ref_type
= "object ";
1392 ref_length
= strlen(ref_type
);
1394 if (memcmp(buffer
, ref_type
, ref_length
) ||
1395 get_sha1_hex((char *) buffer
+ ref_length
, actual_sha1
)) {
1400 /* Now we have the ID of the referred-to object in
1401 * actual_sha1. Check again. */
1405 static void write_sha1_file_prepare(void *buf
, unsigned long len
,
1406 const char *type
, unsigned char *sha1
,
1407 unsigned char *hdr
, int *hdrlen
)
1411 /* Generate the header */
1412 *hdrlen
= sprintf((char *)hdr
, "%s %lu", type
, len
)+1;
1416 SHA1_Update(&c
, hdr
, *hdrlen
);
1417 SHA1_Update(&c
, buf
, len
);
1418 SHA1_Final(sha1
, &c
);
1422 * Link the tempfile to the final place, possibly creating the
1423 * last directory level as you do so.
1425 * Returns the errno on failure, 0 on success.
1427 static int link_temp_to_file(const char *tmpfile
, const char *filename
)
1432 if (!link(tmpfile
, filename
))
1436 * Try to mkdir the last path component if that failed.
1438 * Re-try the "link()" regardless of whether the mkdir
1439 * succeeds, since a race might mean that somebody
1443 dir
= strrchr(filename
, '/');
1446 if (!mkdir(filename
, 0777) && adjust_shared_perm(filename
)) {
1451 if (!link(tmpfile
, filename
))
1459 * Move the just written object into its final resting place
1461 int move_temp_to_file(const char *tmpfile
, const char *filename
)
1463 int ret
= link_temp_to_file(tmpfile
, filename
);
1466 * Coda hack - coda doesn't like cross-directory links,
1467 * so we fall back to a rename, which will mean that it
1468 * won't be able to check collisions, but that's not a
1471 * The same holds for FAT formatted media.
1473 * When this succeeds, we just return 0. We have nothing
1476 if (ret
&& ret
!= EEXIST
) {
1477 if (!rename(tmpfile
, filename
))
1483 if (ret
!= EEXIST
) {
1484 return error("unable to write sha1 filename %s: %s\n", filename
, strerror(ret
));
1486 /* FIXME!!! Collision check here ? */
1492 static int write_buffer(int fd
, const void *buf
, size_t len
)
1497 size
= write(fd
, buf
, len
);
1499 return error("file write: disk full");
1501 if (errno
== EINTR
|| errno
== EAGAIN
)
1503 return error("file write error (%s)", strerror(errno
));
1506 buf
= (char *) buf
+ size
;
1511 static int write_binary_header(unsigned char *hdr
, enum object_type type
, unsigned long len
)
1516 c
= (type
<< 4) | (len
& 15);
1529 static void setup_object_header(z_stream
*stream
, const char *type
, unsigned long len
)
1533 if (use_legacy_headers
) {
1534 while (deflate(stream
, 0) == Z_OK
)
1538 if (!strcmp(type
, blob_type
))
1539 obj_type
= OBJ_BLOB
;
1540 else if (!strcmp(type
, tree_type
))
1541 obj_type
= OBJ_TREE
;
1542 else if (!strcmp(type
, commit_type
))
1543 obj_type
= OBJ_COMMIT
;
1544 else if (!strcmp(type
, tag_type
))
1547 die("trying to generate bogus object of type '%s'", type
);
1548 hdr
= write_binary_header(stream
->next_out
, obj_type
, len
);
1549 stream
->total_out
= hdr
;
1550 stream
->next_out
+= hdr
;
1551 stream
->avail_out
-= hdr
;
1554 int hash_sha1_file(void *buf
, unsigned long len
, const char *type
,
1555 unsigned char *sha1
)
1557 unsigned char hdr
[50];
1559 write_sha1_file_prepare(buf
, len
, type
, sha1
, hdr
, &hdrlen
);
1563 int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *returnsha1
)
1566 unsigned char *compressed
;
1568 unsigned char sha1
[20];
1570 static char tmpfile
[PATH_MAX
];
1571 unsigned char hdr
[50];
1574 /* Normally if we have it in the pack then we do not bother writing
1575 * it out into .git/objects/??/?{38} file.
1577 write_sha1_file_prepare(buf
, len
, type
, sha1
, hdr
, &hdrlen
);
1578 filename
= sha1_file_name(sha1
);
1580 hashcpy(returnsha1
, sha1
);
1581 if (has_sha1_file(sha1
))
1583 fd
= open(filename
, O_RDONLY
);
1586 * FIXME!!! We might do collision checking here, but we'd
1587 * need to uncompress the old file and check it. Later.
1593 if (errno
!= ENOENT
) {
1594 return error("sha1 file %s: %s\n", filename
, strerror(errno
));
1597 snprintf(tmpfile
, sizeof(tmpfile
), "%s/obj_XXXXXX", get_object_directory());
1599 fd
= mkstemp(tmpfile
);
1602 return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
1604 return error("unable to create temporary sha1 filename %s: %s\n", tmpfile
, strerror(errno
));
1608 memset(&stream
, 0, sizeof(stream
));
1609 deflateInit(&stream
, zlib_compression_level
);
1610 size
= 8 + deflateBound(&stream
, len
+hdrlen
);
1611 compressed
= xmalloc(size
);
1614 stream
.next_out
= compressed
;
1615 stream
.avail_out
= size
;
1617 /* First header.. */
1618 stream
.next_in
= hdr
;
1619 stream
.avail_in
= hdrlen
;
1620 setup_object_header(&stream
, type
, len
);
1622 /* Then the data itself.. */
1623 stream
.next_in
= buf
;
1624 stream
.avail_in
= len
;
1625 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1627 deflateEnd(&stream
);
1628 size
= stream
.total_out
;
1630 if (write_buffer(fd
, compressed
, size
) < 0)
1631 die("unable to write sha1 file");
1636 return move_temp_to_file(tmpfile
, filename
);
1640 * We need to unpack and recompress the object for writing
1641 * it out to a different file.
1643 static void *repack_object(const unsigned char *sha1
, unsigned long *objsize
)
1647 unsigned char *unpacked
;
1654 /* need to unpack and recompress it by itself */
1655 unpacked
= read_packed_sha1(sha1
, type
, &len
);
1657 hdrlen
= sprintf(hdr
, "%s %lu", type
, len
) + 1;
1660 memset(&stream
, 0, sizeof(stream
));
1661 deflateInit(&stream
, zlib_compression_level
);
1662 size
= deflateBound(&stream
, len
+ hdrlen
);
1663 buf
= xmalloc(size
);
1666 stream
.next_out
= buf
;
1667 stream
.avail_out
= size
;
1669 /* First header.. */
1670 stream
.next_in
= (void *)hdr
;
1671 stream
.avail_in
= hdrlen
;
1672 while (deflate(&stream
, 0) == Z_OK
)
1675 /* Then the data itself.. */
1676 stream
.next_in
= unpacked
;
1677 stream
.avail_in
= len
;
1678 while (deflate(&stream
, Z_FINISH
) == Z_OK
)
1680 deflateEnd(&stream
);
1683 *objsize
= stream
.total_out
;
1687 int write_sha1_to_fd(int fd
, const unsigned char *sha1
)
1690 unsigned long objsize
;
1691 void *buf
= map_sha1_file(sha1
, &objsize
);
1694 retval
= write_buffer(fd
, buf
, objsize
);
1695 munmap(buf
, objsize
);
1699 buf
= repack_object(sha1
, &objsize
);
1700 retval
= write_buffer(fd
, buf
, objsize
);
1705 int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
1706 size_t bufsize
, size_t *bufposn
)
1708 char tmpfile
[PATH_MAX
];
1711 unsigned char real_sha1
[20];
1712 unsigned char discard
[4096];
1716 snprintf(tmpfile
, sizeof(tmpfile
), "%s/obj_XXXXXX", get_object_directory());
1718 local
= mkstemp(tmpfile
);
1721 return error("insufficient permission for adding an object to repository database %s\n", get_object_directory());
1723 return error("unable to create temporary sha1 filename %s: %s\n", tmpfile
, strerror(errno
));
1726 memset(&stream
, 0, sizeof(stream
));
1728 inflateInit(&stream
);
1735 stream
.avail_in
= *bufposn
;
1736 stream
.next_in
= (unsigned char *) buffer
;
1738 stream
.next_out
= discard
;
1739 stream
.avail_out
= sizeof(discard
);
1740 ret
= inflate(&stream
, Z_SYNC_FLUSH
);
1741 SHA1_Update(&c
, discard
, sizeof(discard
) -
1743 } while (stream
.avail_in
&& ret
== Z_OK
);
1744 if (write_buffer(local
, buffer
, *bufposn
- stream
.avail_in
) < 0)
1745 die("unable to write sha1 file");
1746 memmove(buffer
, buffer
+ *bufposn
- stream
.avail_in
,
1748 *bufposn
= stream
.avail_in
;
1752 size
= read(fd
, buffer
+ *bufposn
, bufsize
- *bufposn
);
1757 return error("Connection closed?");
1758 perror("Reading from connection");
1763 inflateEnd(&stream
);
1766 SHA1_Final(real_sha1
, &c
);
1767 if (ret
!= Z_STREAM_END
) {
1769 return error("File %s corrupted", sha1_to_hex(sha1
));
1771 if (hashcmp(sha1
, real_sha1
)) {
1773 return error("File %s has bad hash", sha1_to_hex(sha1
));
1776 return move_temp_to_file(tmpfile
, sha1_file_name(sha1
));
1779 int has_pack_index(const unsigned char *sha1
)
1782 if (stat(sha1_pack_index_name(sha1
), &st
))
1787 int has_pack_file(const unsigned char *sha1
)
1790 if (stat(sha1_pack_name(sha1
), &st
))
1795 int has_sha1_pack(const unsigned char *sha1
, const char **ignore_packed
)
1797 struct pack_entry e
;
1798 return find_pack_entry(sha1
, &e
, ignore_packed
);
1801 int has_sha1_file(const unsigned char *sha1
)
1804 struct pack_entry e
;
1806 if (find_pack_entry(sha1
, &e
, NULL
))
1808 return find_sha1_file(sha1
, &st
) ? 1 : 0;
1812 * reads from fd as long as possible into a supplied buffer of size bytes.
1813 * If necessary the buffer's size is increased using realloc()
1815 * returns 0 if anything went fine and -1 otherwise
1817 * NOTE: both buf and size may change, but even when -1 is returned
1818 * you still have to free() it yourself.
1820 int read_pipe(int fd
, char** return_buf
, unsigned long* return_size
)
1822 char* buf
= *return_buf
;
1823 unsigned long size
= *return_size
;
1825 unsigned long off
= 0;
1828 iret
= xread(fd
, buf
+ off
, size
- off
);
1833 buf
= xrealloc(buf
, size
);
1846 int index_pipe(unsigned char *sha1
, int fd
, const char *type
, int write_object
)
1848 unsigned long size
= 4096;
1849 char *buf
= xmalloc(size
);
1852 if (read_pipe(fd
, &buf
, &size
)) {
1860 ret
= write_sha1_file(buf
, size
, type
, sha1
);
1862 ret
= hash_sha1_file(buf
, size
, type
, sha1
);
1867 int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, const char *type
)
1869 unsigned long size
= st
->st_size
;
1875 buf
= mmap(NULL
, size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
1877 if (buf
== MAP_FAILED
)
1883 ret
= write_sha1_file(buf
, size
, type
, sha1
);
1885 ret
= hash_sha1_file(buf
, size
, type
, sha1
);
1891 int index_path(unsigned char *sha1
, const char *path
, struct stat
*st
, int write_object
)
1896 switch (st
->st_mode
& S_IFMT
) {
1898 fd
= open(path
, O_RDONLY
);
1900 return error("open(\"%s\"): %s", path
,
1902 if (index_fd(sha1
, fd
, st
, write_object
, NULL
) < 0)
1903 return error("%s: failed to insert into database",
1907 target
= xmalloc(st
->st_size
+1);
1908 if (readlink(path
, target
, st
->st_size
+1) != st
->st_size
) {
1909 char *errstr
= strerror(errno
);
1911 return error("readlink(\"%s\"): %s", path
,
1915 hash_sha1_file(target
, st
->st_size
, blob_type
, sha1
);
1916 else if (write_sha1_file(target
, st
->st_size
, blob_type
, sha1
))
1917 return error("%s: failed to insert into database",
1922 return error("%s: unsupported file type", path
);