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Commit | Line | Data |
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e83c5163 LT |
1 | #ifndef CACHE_H |
2 | #define CACHE_H | |
3 | ||
2dee0609 | 4 | #include <unistd.h> |
e83c5163 LT |
5 | #include <stdio.h> |
6 | #include <sys/stat.h> | |
7 | #include <fcntl.h> | |
8 | #include <stddef.h> | |
9 | #include <stdlib.h> | |
10 | #include <stdarg.h> | |
bf0c6e83 | 11 | #include <string.h> |
e83c5163 | 12 | #include <errno.h> |
6b0c3121 | 13 | #include <limits.h> |
730d48a2 | 14 | #ifndef NO_MMAP |
e83c5163 | 15 | #include <sys/mman.h> |
730d48a2 | 16 | #endif |
bb233d69 | 17 | #include <sys/param.h> |
ccc4feb5 | 18 | #include <netinet/in.h> |
575f4974 LT |
19 | #include <sys/types.h> |
20 | #include <dirent.h> | |
e83c5163 | 21 | |
cef661fc | 22 | #include SHA1_HEADER |
e83c5163 LT |
23 | #include <zlib.h> |
24 | ||
9da3acfb ET |
25 | #if ZLIB_VERNUM < 0x1200 |
26 | #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11) | |
27 | #endif | |
28 | ||
b6829693 ET |
29 | #ifdef DT_UNKNOWN |
30 | #define DTYPE(de) ((de)->d_type) | |
31 | #else | |
32 | #define DT_UNKNOWN 0 | |
33 | #define DT_DIR 1 | |
34 | #define DT_REG 2 | |
a15c1c60 | 35 | #define DT_LNK 3 |
b6829693 ET |
36 | #define DTYPE(de) DT_UNKNOWN |
37 | #endif | |
38 | ||
90334cf7 LT |
39 | #ifdef __GNUC__ |
40 | #define NORETURN __attribute__((__noreturn__)) | |
41 | #else | |
42 | #define NORETURN | |
4ec99bf0 | 43 | #ifndef __attribute__ |
75ea6911 | 44 | #define __attribute__(x) |
4ec99bf0 | 45 | #endif |
f1d090e1 | 46 | #endif |
4ec99bf0 | 47 | |
2386d658 LT |
48 | /* |
49 | * Intensive research over the course of many years has shown that | |
50 | * port 9418 is totally unused by anything else. Or | |
51 | * | |
52 | * Your search - "port 9418" - did not match any documents. | |
53 | * | |
54 | * as www.google.com puts it. | |
ba8a4970 LT |
55 | * |
56 | * This port has been properly assigned for git use by IANA: | |
57 | * git (Assigned-9418) [I06-050728-0001]. | |
58 | * | |
59 | * git 9418/tcp git pack transfer service | |
60 | * git 9418/udp git pack transfer service | |
61 | * | |
62 | * with Linus Torvalds <torvalds@osdl.org> as the point of | |
63 | * contact. September 2005. | |
64 | * | |
65 | * See http://www.iana.org/assignments/port-numbers | |
2386d658 LT |
66 | */ |
67 | #define DEFAULT_GIT_PORT 9418 | |
68 | ||
e83c5163 LT |
69 | /* |
70 | * Basic data structures for the directory cache | |
e83c5163 LT |
71 | */ |
72 | ||
73 | #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ | |
74 | struct cache_header { | |
ccc4feb5 LT |
75 | unsigned int hdr_signature; |
76 | unsigned int hdr_version; | |
77 | unsigned int hdr_entries; | |
e83c5163 LT |
78 | }; |
79 | ||
80 | /* | |
81 | * The "cache_time" is just the low 32 bits of the | |
82 | * time. It doesn't matter if it overflows - we only | |
83 | * check it for equality in the 32 bits we save. | |
84 | */ | |
85 | struct cache_time { | |
86 | unsigned int sec; | |
87 | unsigned int nsec; | |
88 | }; | |
89 | ||
90 | /* | |
91 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
92 | * Again - this is just a (very strong in practice) heuristic that | |
93 | * the inode hasn't changed. | |
ccc4feb5 LT |
94 | * |
95 | * We save the fields in big-endian order to allow using the | |
96 | * index file over NFS transparently. | |
e83c5163 LT |
97 | */ |
98 | struct cache_entry { | |
ccc4feb5 LT |
99 | struct cache_time ce_ctime; |
100 | struct cache_time ce_mtime; | |
101 | unsigned int ce_dev; | |
102 | unsigned int ce_ino; | |
103 | unsigned int ce_mode; | |
104 | unsigned int ce_uid; | |
105 | unsigned int ce_gid; | |
106 | unsigned int ce_size; | |
e83c5163 | 107 | unsigned char sha1[20]; |
f5cabd13 | 108 | unsigned short ce_flags; |
2c04662d | 109 | char name[0]; |
e83c5163 LT |
110 | }; |
111 | ||
95fd5bf8 LT |
112 | #define CE_NAMEMASK (0x0fff) |
113 | #define CE_STAGEMASK (0x3000) | |
220a0b52 | 114 | #define CE_UPDATE (0x4000) |
aee46198 | 115 | #define CE_STAGESHIFT 12 |
95fd5bf8 | 116 | |
aee46198 JH |
117 | #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT)) |
118 | #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags)) | |
119 | #define ce_size(ce) cache_entry_size(ce_namelen(ce)) | |
120 | #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT) | |
121 | ||
e4479470 | 122 | #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) |
8ae0a8c5 KS |
123 | static inline unsigned int create_ce_mode(unsigned int mode) |
124 | { | |
8ae0a8c5 KS |
125 | if (S_ISLNK(mode)) |
126 | return htonl(S_IFLNK); | |
db823d4a | 127 | return htonl(S_IFREG | ce_permissions(mode)); |
8ae0a8c5 | 128 | } |
e4479470 | 129 | |
aee46198 | 130 | #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) |
f5cabd13 | 131 | |
88355048 PB |
132 | extern struct cache_entry **active_cache; |
133 | extern unsigned int active_nr, active_alloc, active_cache_changed; | |
e83c5163 | 134 | |
8ac069ac JH |
135 | #define GIT_DIR_ENVIRONMENT "GIT_DIR" |
136 | #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" | |
d19938ab | 137 | #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" |
bb233d69 | 138 | #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" |
5da5c8f4 | 139 | #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" |
bb233d69 | 140 | |
5da1606d | 141 | extern char *get_git_dir(void); |
8ac069ac | 142 | extern char *get_object_directory(void); |
95fc7512 | 143 | extern char *get_refs_directory(void); |
8ac069ac | 144 | extern char *get_index_file(void); |
5da5c8f4 | 145 | extern char *get_graft_file(void); |
8ac069ac JH |
146 | |
147 | #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" | |
bb233d69 | 148 | |
6b5ee137 | 149 | extern const char **get_pathspec(const char *prefix, const char **pathspec); |
d288a700 | 150 | extern const char *setup_git_directory(void); |
6b5ee137 | 151 | extern const char *prefix_path(const char *prefix, int len, const char *path); |
d288a700 | 152 | |
e83c5163 LT |
153 | #define alloc_nr(x) (((x)+16)*3/2) |
154 | ||
734aab75 | 155 | /* Initialize and use the cache information */ |
e83c5163 | 156 | extern int read_cache(void); |
197ee8c9 | 157 | extern int write_cache(int newfd, struct cache_entry **cache, int entries); |
eb38c22f | 158 | extern int cache_name_pos(const char *name, int namelen); |
192268c1 JH |
159 | #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ |
160 | #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ | |
b155725d | 161 | #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ |
192268c1 | 162 | extern int add_cache_entry(struct cache_entry *ce, int option); |
dbbce55b | 163 | extern int remove_cache_entry_at(int pos); |
6b5ee137 | 164 | extern int remove_file_from_cache(const char *path); |
dbbce55b | 165 | extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); |
5d728c84 | 166 | extern int ce_match_stat(struct cache_entry *ce, struct stat *st); |
b0391890 | 167 | extern int ce_modified(struct cache_entry *ce, struct stat *st); |
c0fd1f51 | 168 | extern int ce_path_match(const struct cache_entry *ce, const char **pathspec); |
7672db20 | 169 | extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type); |
ec1fcc16 | 170 | extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object); |
415e96c8 JH |
171 | extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); |
172 | ||
173 | struct cache_file { | |
174 | struct cache_file *next; | |
175 | char lockfile[PATH_MAX]; | |
176 | }; | |
177 | extern int hold_index_file_for_update(struct cache_file *, const char *path); | |
178 | extern int commit_index_file(struct cache_file *); | |
179 | extern void rollback_index_file(struct cache_file *); | |
734aab75 | 180 | |
17712991 | 181 | extern int trust_executable_bit; |
f8348be3 | 182 | extern int only_use_symrefs; |
3299c6f6 | 183 | extern int diff_rename_limit_default; |
17712991 | 184 | |
734aab75 LT |
185 | #define MTIME_CHANGED 0x0001 |
186 | #define CTIME_CHANGED 0x0002 | |
187 | #define OWNER_CHANGED 0x0004 | |
188 | #define MODE_CHANGED 0x0008 | |
189 | #define INODE_CHANGED 0x0010 | |
190 | #define DATA_CHANGED 0x0020 | |
8ae0a8c5 | 191 | #define TYPE_CHANGED 0x0040 |
e83c5163 LT |
192 | |
193 | /* Return a statically allocated filename matching the sha1 signature */ | |
4ec99bf0 TS |
194 | extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); |
195 | extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
73134b6d | 196 | extern char *sha1_file_name(const unsigned char *sha1); |
bf592c50 DB |
197 | extern char *sha1_pack_name(const unsigned char *sha1); |
198 | extern char *sha1_pack_index_name(const unsigned char *sha1); | |
013f276e | 199 | extern const char *find_unique_abbrev(const unsigned char *sha1, int); |
88cd621d | 200 | extern const unsigned char null_sha1[20]; |
e83c5163 | 201 | |
f2db68ed HE |
202 | int git_mkstemp(char *path, size_t n, const char *template); |
203 | ||
b2cb9425 | 204 | int safe_create_leading_directories(char *path); |
f2db68ed | 205 | char *safe_strncpy(char *, const char *, size_t); |
bd22c904 | 206 | char *enter_repo(char *path, int strict); |
b2cb9425 | 207 | |
e83c5163 | 208 | /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ |
c4483576 | 209 | extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size); |
5180cacc | 210 | extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep); |
36e4d74a | 211 | extern int sha1_object_info(const unsigned char *, char *, unsigned long *); |
2ade9340 | 212 | extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size); |
73134b6d | 213 | extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size); |
bf0f910d | 214 | extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1); |
7672db20 BL |
215 | extern char *write_sha1_file_prepare(void *buf, |
216 | unsigned long len, | |
217 | const char *type, | |
218 | unsigned char *sha1, | |
219 | unsigned char *hdr, | |
220 | int *hdrlen); | |
8237b185 | 221 | |
5d6ccf5c | 222 | extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); |
e83c5163 | 223 | |
94537c78 | 224 | /* Read a tree into the cache */ |
3e587635 | 225 | extern int read_tree(void *buffer, unsigned long size, int stage, const char **paths); |
94537c78 | 226 | |
70b9829e DB |
227 | extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer, |
228 | size_t bufsize, size_t *bufposn); | |
a5eda52b | 229 | extern int write_sha1_to_fd(int fd, const unsigned char *sha1); |
b721e01f | 230 | extern int move_temp_to_file(const char *tmpfile, char *filename); |
8237b185 | 231 | |
dade09c2 | 232 | extern int has_sha1_pack(const unsigned char *sha1); |
8237b185 DB |
233 | extern int has_sha1_file(const unsigned char *sha1); |
234 | ||
bf592c50 DB |
235 | extern int has_pack_file(const unsigned char *sha1); |
236 | extern int has_pack_index(const unsigned char *sha1); | |
237 | ||
e83c5163 | 238 | /* Convert to/from hex/sha1 representation */ |
3c249c95 | 239 | extern int get_sha1(const char *str, unsigned char *sha1); |
197ee8c9 LT |
240 | extern int get_sha1_hex(const char *hex, unsigned char *sha1); |
241 | extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ | |
ca8db142 | 242 | extern int read_ref(const char *filename, unsigned char *sha1); |
a876ed83 | 243 | extern const char *resolve_ref(const char *path, unsigned char *sha1, int); |
8098a178 JH |
244 | extern int create_symref(const char *git_HEAD, const char *refs_heads_master); |
245 | extern int validate_symref(const char *git_HEAD); | |
e83c5163 LT |
246 | |
247 | /* General helper functions */ | |
90334cf7 | 248 | extern void usage(const char *err) NORETURN; |
4ec99bf0 TS |
249 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); |
250 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
2de381f9 | 251 | |
958ba6c9 | 252 | extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); |
79517a06 | 253 | extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2); |
e83c5163 | 254 | |
40469ee9 | 255 | extern void *read_object_with_reference(const unsigned char *sha1, |
bf0f910d | 256 | const char *required_type, |
40469ee9 JH |
257 | unsigned long *size, |
258 | unsigned char *sha1_ret); | |
f4913f91 | 259 | |
f80cd783 | 260 | const char *show_date(unsigned long time, int timezone); |
2a39064c | 261 | int parse_date(const char *date, char *buf, int bufsize); |
ecee9d9e | 262 | void datestamp(char *buf, int bufsize); |
3c07b1d1 | 263 | unsigned long approxidate(const char *); |
ecee9d9e | 264 | |
6aa33f40 LT |
265 | extern int setup_ident(void); |
266 | extern char *get_ident(const char *name, const char *email, const char *date_str); | |
d289d136 EB |
267 | extern char *git_author_info(void); |
268 | extern char *git_committer_info(void); | |
6aa33f40 | 269 | |
127cfd0d | 270 | static inline void *xmalloc(size_t size) |
812666c8 CL |
271 | { |
272 | void *ret = malloc(size); | |
273 | if (!ret) | |
274 | die("Out of memory, malloc failed"); | |
275 | return ret; | |
276 | } | |
277 | ||
127cfd0d | 278 | static inline void *xrealloc(void *ptr, size_t size) |
812666c8 CL |
279 | { |
280 | void *ret = realloc(ptr, size); | |
281 | if (!ret) | |
282 | die("Out of memory, realloc failed"); | |
283 | return ret; | |
284 | } | |
285 | ||
127cfd0d BR |
286 | static inline void *xcalloc(size_t nmemb, size_t size) |
287 | { | |
288 | void *ret = calloc(nmemb, size); | |
289 | if (!ret) | |
290 | die("Out of memory, calloc failed"); | |
291 | return ret; | |
292 | } | |
293 | ||
12dccc16 LT |
294 | struct checkout { |
295 | const char *base_dir; | |
296 | int base_dir_len; | |
297 | unsigned force:1, | |
298 | quiet:1, | |
299 | not_new:1, | |
300 | refresh_cache:1; | |
301 | }; | |
302 | ||
303 | extern int checkout_entry(struct cache_entry *ce, struct checkout *state); | |
304 | ||
9a217f2a | 305 | extern struct alternate_object_database { |
d5a63b99 | 306 | struct alternate_object_database *next; |
9a217f2a | 307 | char *name; |
2c04662d | 308 | char base[0]; /* more */ |
d5a63b99 | 309 | } *alt_odb_list; |
9a217f2a JH |
310 | extern void prepare_alt_odb(void); |
311 | ||
312 | extern struct packed_git { | |
313 | struct packed_git *next; | |
314 | unsigned long index_size; | |
315 | unsigned long pack_size; | |
316 | unsigned int *index_base; | |
317 | void *pack_base; | |
318 | unsigned int pack_last_used; | |
f9253394 | 319 | unsigned int pack_use_cnt; |
9d835df2 | 320 | int pack_local; |
bf592c50 | 321 | unsigned char sha1[20]; |
2c04662d | 322 | char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */ |
9a217f2a | 323 | } *packed_git; |
f3bf9224 JH |
324 | |
325 | struct pack_entry { | |
326 | unsigned int offset; | |
327 | unsigned char sha1[20]; | |
328 | struct packed_git *p; | |
329 | }; | |
330 | ||
d1c133f5 LT |
331 | struct ref { |
332 | struct ref *next; | |
333 | unsigned char old_sha1[20]; | |
334 | unsigned char new_sha1[20]; | |
ff27adf3 | 335 | unsigned char force; |
f88395ac | 336 | struct ref *peer_ref; /* when renaming */ |
2c04662d | 337 | char name[0]; |
d1c133f5 LT |
338 | }; |
339 | ||
f7192598 LT |
340 | extern int git_connect(int fd[2], char *url, const char *prog); |
341 | extern int finish_connect(pid_t pid); | |
013e7c7f | 342 | extern int path_match(const char *path, int nr, char **match); |
f88395ac JH |
343 | extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, |
344 | int nr_refspec, char **refspec, int all); | |
41cb7488 | 345 | extern int get_ack(int fd, unsigned char *result_sha1); |
1a7141ff | 346 | extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny); |
211b5f9e | 347 | extern int server_supports(const char *feature); |
f7192598 | 348 | |
bf592c50 | 349 | extern struct packed_git *parse_pack_index(unsigned char *sha1); |
2ab141a2 | 350 | extern struct packed_git *parse_pack_index_file(const unsigned char *sha1, |
c508df5e | 351 | char *idx_path); |
bf592c50 | 352 | |
9a217f2a | 353 | extern void prepare_packed_git(void); |
bf592c50 DB |
354 | extern void install_packed_git(struct packed_git *pack); |
355 | ||
356 | extern struct packed_git *find_sha1_pack(const unsigned char *sha1, | |
357 | struct packed_git *packs); | |
358 | ||
f9253394 JH |
359 | extern int use_packed_git(struct packed_git *); |
360 | extern void unuse_packed_git(struct packed_git *); | |
9d835df2 | 361 | extern struct packed_git *add_packed_git(char *, int, int); |
9a217f2a JH |
362 | extern int num_packed_objects(const struct packed_git *p); |
363 | extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*); | |
f3bf9224 JH |
364 | extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *); |
365 | extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *); | |
ad8c80a5 | 366 | extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, int *, unsigned char *); |
9a217f2a | 367 | |
8f3f9b09 JH |
368 | /* Dumb servers support */ |
369 | extern int update_server_info(int); | |
370 | ||
730d48a2 JS |
371 | #ifdef NO_MMAP |
372 | ||
373 | #ifndef PROT_READ | |
374 | #define PROT_READ 1 | |
375 | #define PROT_WRITE 2 | |
376 | #define MAP_PRIVATE 1 | |
377 | #define MAP_FAILED ((void*)-1) | |
378 | #endif | |
379 | ||
380 | extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset); | |
381 | extern int gitfakemunmap(void *start, size_t length); | |
382 | ||
383 | #endif | |
384 | ||
17712991 LT |
385 | typedef int (*config_fn_t)(const char *, const char *); |
386 | extern int git_default_config(const char *, const char *); | |
387 | extern int git_config(config_fn_t fn); | |
388 | extern int git_config_int(const char *, const char *); | |
389 | extern int git_config_bool(const char *, const char *); | |
10bea152 | 390 | extern int git_config_set(const char *, const char *); |
4ddba79d | 391 | extern int git_config_set_multivar(const char *, const char *, const char *, int); |
17712991 | 392 | |
e1b10391 LT |
393 | #define MAX_GITNAME (1000) |
394 | extern char git_default_email[MAX_GITNAME]; | |
395 | extern char git_default_name[MAX_GITNAME]; | |
396 | ||
4546738b LT |
397 | /* Sane ctype - no locale, and works with signed chars */ |
398 | #undef isspace | |
399 | #undef isdigit | |
400 | #undef isalpha | |
401 | #undef isalnum | |
402 | #undef tolower | |
403 | #undef toupper | |
404 | extern unsigned char sane_ctype[256]; | |
405 | #define GIT_SPACE 0x01 | |
406 | #define GIT_DIGIT 0x02 | |
407 | #define GIT_ALPHA 0x04 | |
408 | #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0) | |
409 | #define isspace(x) sane_istest(x,GIT_SPACE) | |
410 | #define isdigit(x) sane_istest(x,GIT_DIGIT) | |
411 | #define isalpha(x) sane_istest(x,GIT_ALPHA) | |
412 | #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT) | |
413 | #define tolower(x) sane_case((unsigned char)(x), 0x20) | |
414 | #define toupper(x) sane_case((unsigned char)(x), 0) | |
415 | ||
416 | static inline int sane_case(int x, int high) | |
417 | { | |
418 | if (sane_istest(x, GIT_ALPHA)) | |
419 | x = (x & ~0x20) | high; | |
420 | return x; | |
421 | } | |
422 | ||
f3123c4a | 423 | extern int copy_fd(int ifd, int ofd); |
e83c5163 | 424 | #endif /* CACHE_H */ |