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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> |
e83c5163 | 14 | #include <sys/mman.h> |
bb233d69 | 15 | #include <sys/param.h> |
ccc4feb5 | 16 | #include <netinet/in.h> |
575f4974 LT |
17 | #include <sys/types.h> |
18 | #include <dirent.h> | |
e83c5163 | 19 | |
cef661fc | 20 | #include SHA1_HEADER |
e83c5163 LT |
21 | #include <zlib.h> |
22 | ||
9da3acfb ET |
23 | #if ZLIB_VERNUM < 0x1200 |
24 | #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11) | |
25 | #endif | |
26 | ||
b6829693 ET |
27 | #ifdef DT_UNKNOWN |
28 | #define DTYPE(de) ((de)->d_type) | |
29 | #else | |
30 | #define DT_UNKNOWN 0 | |
31 | #define DT_DIR 1 | |
32 | #define DT_REG 2 | |
a15c1c60 | 33 | #define DT_LNK 3 |
b6829693 ET |
34 | #define DTYPE(de) DT_UNKNOWN |
35 | #endif | |
36 | ||
90334cf7 LT |
37 | #ifdef __GNUC__ |
38 | #define NORETURN __attribute__((__noreturn__)) | |
39 | #else | |
40 | #define NORETURN | |
4ec99bf0 | 41 | #ifndef __attribute__ |
75ea6911 | 42 | #define __attribute__(x) |
4ec99bf0 | 43 | #endif |
f1d090e1 | 44 | #endif |
4ec99bf0 | 45 | |
2386d658 LT |
46 | /* |
47 | * Intensive research over the course of many years has shown that | |
48 | * port 9418 is totally unused by anything else. Or | |
49 | * | |
50 | * Your search - "port 9418" - did not match any documents. | |
51 | * | |
52 | * as www.google.com puts it. | |
ba8a4970 LT |
53 | * |
54 | * This port has been properly assigned for git use by IANA: | |
55 | * git (Assigned-9418) [I06-050728-0001]. | |
56 | * | |
57 | * git 9418/tcp git pack transfer service | |
58 | * git 9418/udp git pack transfer service | |
59 | * | |
60 | * with Linus Torvalds <torvalds@osdl.org> as the point of | |
61 | * contact. September 2005. | |
62 | * | |
63 | * See http://www.iana.org/assignments/port-numbers | |
2386d658 LT |
64 | */ |
65 | #define DEFAULT_GIT_PORT 9418 | |
66 | ||
e83c5163 LT |
67 | /* |
68 | * Basic data structures for the directory cache | |
e83c5163 LT |
69 | */ |
70 | ||
71 | #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ | |
72 | struct cache_header { | |
ccc4feb5 LT |
73 | unsigned int hdr_signature; |
74 | unsigned int hdr_version; | |
75 | unsigned int hdr_entries; | |
e83c5163 LT |
76 | }; |
77 | ||
78 | /* | |
79 | * The "cache_time" is just the low 32 bits of the | |
80 | * time. It doesn't matter if it overflows - we only | |
81 | * check it for equality in the 32 bits we save. | |
82 | */ | |
83 | struct cache_time { | |
84 | unsigned int sec; | |
85 | unsigned int nsec; | |
86 | }; | |
87 | ||
88 | /* | |
89 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
90 | * Again - this is just a (very strong in practice) heuristic that | |
91 | * the inode hasn't changed. | |
ccc4feb5 LT |
92 | * |
93 | * We save the fields in big-endian order to allow using the | |
94 | * index file over NFS transparently. | |
e83c5163 LT |
95 | */ |
96 | struct cache_entry { | |
ccc4feb5 LT |
97 | struct cache_time ce_ctime; |
98 | struct cache_time ce_mtime; | |
99 | unsigned int ce_dev; | |
100 | unsigned int ce_ino; | |
101 | unsigned int ce_mode; | |
102 | unsigned int ce_uid; | |
103 | unsigned int ce_gid; | |
104 | unsigned int ce_size; | |
e83c5163 | 105 | unsigned char sha1[20]; |
f5cabd13 | 106 | unsigned short ce_flags; |
2c04662d | 107 | char name[0]; |
e83c5163 LT |
108 | }; |
109 | ||
95fd5bf8 LT |
110 | #define CE_NAMEMASK (0x0fff) |
111 | #define CE_STAGEMASK (0x3000) | |
220a0b52 | 112 | #define CE_UPDATE (0x4000) |
aee46198 | 113 | #define CE_STAGESHIFT 12 |
95fd5bf8 | 114 | |
aee46198 JH |
115 | #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT)) |
116 | #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags)) | |
117 | #define ce_size(ce) cache_entry_size(ce_namelen(ce)) | |
118 | #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT) | |
119 | ||
e4479470 | 120 | #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) |
8ae0a8c5 KS |
121 | static inline unsigned int create_ce_mode(unsigned int mode) |
122 | { | |
8ae0a8c5 KS |
123 | if (S_ISLNK(mode)) |
124 | return htonl(S_IFLNK); | |
db823d4a | 125 | return htonl(S_IFREG | ce_permissions(mode)); |
8ae0a8c5 | 126 | } |
e4479470 | 127 | |
aee46198 | 128 | #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) |
f5cabd13 | 129 | |
88355048 PB |
130 | extern struct cache_entry **active_cache; |
131 | extern unsigned int active_nr, active_alloc, active_cache_changed; | |
e83c5163 | 132 | |
8ac069ac JH |
133 | #define GIT_DIR_ENVIRONMENT "GIT_DIR" |
134 | #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" | |
d19938ab | 135 | #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" |
bb233d69 | 136 | #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" |
5da5c8f4 | 137 | #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" |
bb233d69 | 138 | |
8ac069ac | 139 | extern char *get_object_directory(void); |
95fc7512 | 140 | extern char *get_refs_directory(void); |
8ac069ac | 141 | extern char *get_index_file(void); |
5da5c8f4 | 142 | extern char *get_graft_file(void); |
8ac069ac JH |
143 | |
144 | #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" | |
bb233d69 | 145 | |
d288a700 LT |
146 | extern const char **get_pathspec(const char *prefix, char **pathspec); |
147 | extern const char *setup_git_directory(void); | |
828cc617 | 148 | extern char *prefix_path(const char *prefix, int len, char *path); |
d288a700 | 149 | |
e83c5163 LT |
150 | #define alloc_nr(x) (((x)+16)*3/2) |
151 | ||
734aab75 | 152 | /* Initialize and use the cache information */ |
e83c5163 | 153 | extern int read_cache(void); |
197ee8c9 | 154 | extern int write_cache(int newfd, struct cache_entry **cache, int entries); |
eb38c22f | 155 | extern int cache_name_pos(const char *name, int namelen); |
192268c1 JH |
156 | #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ |
157 | #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ | |
b155725d | 158 | #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ |
192268c1 | 159 | extern int add_cache_entry(struct cache_entry *ce, int option); |
dbbce55b | 160 | extern int remove_cache_entry_at(int pos); |
197ee8c9 | 161 | extern int remove_file_from_cache(char *path); |
dbbce55b | 162 | extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); |
5d728c84 | 163 | extern int ce_match_stat(struct cache_entry *ce, struct stat *st); |
b0391890 | 164 | extern int ce_modified(struct cache_entry *ce, struct stat *st); |
c0fd1f51 | 165 | extern int ce_path_match(const struct cache_entry *ce, const char **pathspec); |
7672db20 | 166 | extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type); |
415e96c8 JH |
167 | extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); |
168 | ||
169 | struct cache_file { | |
170 | struct cache_file *next; | |
171 | char lockfile[PATH_MAX]; | |
172 | }; | |
173 | extern int hold_index_file_for_update(struct cache_file *, const char *path); | |
174 | extern int commit_index_file(struct cache_file *); | |
175 | extern void rollback_index_file(struct cache_file *); | |
734aab75 LT |
176 | |
177 | #define MTIME_CHANGED 0x0001 | |
178 | #define CTIME_CHANGED 0x0002 | |
179 | #define OWNER_CHANGED 0x0004 | |
180 | #define MODE_CHANGED 0x0008 | |
181 | #define INODE_CHANGED 0x0010 | |
182 | #define DATA_CHANGED 0x0020 | |
8ae0a8c5 | 183 | #define TYPE_CHANGED 0x0040 |
e83c5163 LT |
184 | |
185 | /* Return a statically allocated filename matching the sha1 signature */ | |
4ec99bf0 TS |
186 | extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); |
187 | extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
73134b6d | 188 | extern char *sha1_file_name(const unsigned char *sha1); |
bf592c50 DB |
189 | extern char *sha1_pack_name(const unsigned char *sha1); |
190 | extern char *sha1_pack_index_name(const unsigned char *sha1); | |
e83c5163 | 191 | |
f2db68ed HE |
192 | int git_mkstemp(char *path, size_t n, const char *template); |
193 | ||
b2cb9425 | 194 | int safe_create_leading_directories(char *path); |
f2db68ed | 195 | char *safe_strncpy(char *, const char *, size_t); |
b2cb9425 | 196 | |
e83c5163 | 197 | /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ |
c4483576 | 198 | extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size); |
5180cacc | 199 | extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep); |
36e4d74a | 200 | extern int sha1_object_info(const unsigned char *, char *, unsigned long *); |
2ade9340 | 201 | extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size); |
73134b6d | 202 | extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size); |
bf0f910d | 203 | extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1); |
7672db20 BL |
204 | extern char *write_sha1_file_prepare(void *buf, |
205 | unsigned long len, | |
206 | const char *type, | |
207 | unsigned char *sha1, | |
208 | unsigned char *hdr, | |
209 | int *hdrlen); | |
8237b185 | 210 | |
5d6ccf5c | 211 | extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); |
e83c5163 | 212 | |
94537c78 | 213 | /* Read a tree into the cache */ |
3e587635 | 214 | extern int read_tree(void *buffer, unsigned long size, int stage, const char **paths); |
94537c78 | 215 | |
70b9829e DB |
216 | extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer, |
217 | size_t bufsize, size_t *bufposn); | |
a5eda52b | 218 | extern int write_sha1_to_fd(int fd, const unsigned char *sha1); |
8237b185 | 219 | |
dade09c2 | 220 | extern int has_sha1_pack(const unsigned char *sha1); |
8237b185 DB |
221 | extern int has_sha1_file(const unsigned char *sha1); |
222 | ||
bf592c50 DB |
223 | extern int has_pack_file(const unsigned char *sha1); |
224 | extern int has_pack_index(const unsigned char *sha1); | |
225 | ||
e83c5163 | 226 | /* Convert to/from hex/sha1 representation */ |
3c249c95 | 227 | extern int get_sha1(const char *str, unsigned char *sha1); |
197ee8c9 LT |
228 | extern int get_sha1_hex(const char *hex, unsigned char *sha1); |
229 | extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ | |
e83c5163 LT |
230 | |
231 | /* General helper functions */ | |
90334cf7 | 232 | extern void usage(const char *err) NORETURN; |
4ec99bf0 TS |
233 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); |
234 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
2de381f9 | 235 | |
958ba6c9 | 236 | extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); |
79517a06 | 237 | extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2); |
e83c5163 | 238 | |
40469ee9 | 239 | extern void *read_object_with_reference(const unsigned char *sha1, |
bf0f910d | 240 | const char *required_type, |
40469ee9 JH |
241 | unsigned long *size, |
242 | unsigned char *sha1_ret); | |
f4913f91 | 243 | |
f80cd783 | 244 | const char *show_date(unsigned long time, int timezone); |
2a39064c | 245 | int parse_date(const char *date, char *buf, int bufsize); |
ecee9d9e ET |
246 | void datestamp(char *buf, int bufsize); |
247 | ||
6aa33f40 LT |
248 | extern int setup_ident(void); |
249 | extern char *get_ident(const char *name, const char *email, const char *date_str); | |
d289d136 EB |
250 | extern char *git_author_info(void); |
251 | extern char *git_committer_info(void); | |
6aa33f40 | 252 | |
127cfd0d | 253 | static inline void *xmalloc(size_t size) |
812666c8 CL |
254 | { |
255 | void *ret = malloc(size); | |
256 | if (!ret) | |
257 | die("Out of memory, malloc failed"); | |
258 | return ret; | |
259 | } | |
260 | ||
127cfd0d | 261 | static inline void *xrealloc(void *ptr, size_t size) |
812666c8 CL |
262 | { |
263 | void *ret = realloc(ptr, size); | |
264 | if (!ret) | |
265 | die("Out of memory, realloc failed"); | |
266 | return ret; | |
267 | } | |
268 | ||
127cfd0d BR |
269 | static inline void *xcalloc(size_t nmemb, size_t size) |
270 | { | |
271 | void *ret = calloc(nmemb, size); | |
272 | if (!ret) | |
273 | die("Out of memory, calloc failed"); | |
274 | return ret; | |
275 | } | |
276 | ||
12dccc16 LT |
277 | struct checkout { |
278 | const char *base_dir; | |
279 | int base_dir_len; | |
280 | unsigned force:1, | |
281 | quiet:1, | |
282 | not_new:1, | |
283 | refresh_cache:1; | |
284 | }; | |
285 | ||
286 | extern int checkout_entry(struct cache_entry *ce, struct checkout *state); | |
287 | ||
9a217f2a | 288 | extern struct alternate_object_database { |
d5a63b99 | 289 | struct alternate_object_database *next; |
9a217f2a | 290 | char *name; |
2c04662d | 291 | char base[0]; /* more */ |
d5a63b99 | 292 | } *alt_odb_list; |
9a217f2a JH |
293 | extern void prepare_alt_odb(void); |
294 | ||
295 | extern struct packed_git { | |
296 | struct packed_git *next; | |
297 | unsigned long index_size; | |
298 | unsigned long pack_size; | |
299 | unsigned int *index_base; | |
300 | void *pack_base; | |
301 | unsigned int pack_last_used; | |
f9253394 | 302 | unsigned int pack_use_cnt; |
bf592c50 | 303 | unsigned char sha1[20]; |
2c04662d | 304 | char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */ |
9a217f2a | 305 | } *packed_git; |
f3bf9224 JH |
306 | |
307 | struct pack_entry { | |
308 | unsigned int offset; | |
309 | unsigned char sha1[20]; | |
310 | struct packed_git *p; | |
311 | }; | |
312 | ||
d1c133f5 LT |
313 | struct ref { |
314 | struct ref *next; | |
315 | unsigned char old_sha1[20]; | |
316 | unsigned char new_sha1[20]; | |
ff27adf3 | 317 | unsigned char force; |
f88395ac | 318 | struct ref *peer_ref; /* when renaming */ |
2c04662d | 319 | char name[0]; |
d1c133f5 LT |
320 | }; |
321 | ||
f7192598 LT |
322 | extern int git_connect(int fd[2], char *url, const char *prog); |
323 | extern int finish_connect(pid_t pid); | |
013e7c7f | 324 | extern int path_match(const char *path, int nr, char **match); |
f88395ac JH |
325 | extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, |
326 | int nr_refspec, char **refspec, int all); | |
41cb7488 | 327 | extern int get_ack(int fd, unsigned char *result_sha1); |
d1c133f5 | 328 | extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match); |
f7192598 | 329 | |
bf592c50 | 330 | extern struct packed_git *parse_pack_index(unsigned char *sha1); |
2ab141a2 | 331 | extern struct packed_git *parse_pack_index_file(const unsigned char *sha1, |
c508df5e | 332 | char *idx_path); |
bf592c50 | 333 | |
9a217f2a | 334 | extern void prepare_packed_git(void); |
bf592c50 DB |
335 | extern void install_packed_git(struct packed_git *pack); |
336 | ||
337 | extern struct packed_git *find_sha1_pack(const unsigned char *sha1, | |
338 | struct packed_git *packs); | |
339 | ||
f9253394 JH |
340 | extern int use_packed_git(struct packed_git *); |
341 | extern void unuse_packed_git(struct packed_git *); | |
342 | extern struct packed_git *add_packed_git(char *, int); | |
9a217f2a JH |
343 | extern int num_packed_objects(const struct packed_git *p); |
344 | extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*); | |
f3bf9224 JH |
345 | extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *); |
346 | extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *); | |
ad8c80a5 | 347 | extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, int *, unsigned char *); |
9a217f2a | 348 | |
8f3f9b09 JH |
349 | /* Dumb servers support */ |
350 | extern int update_server_info(int); | |
351 | ||
e83c5163 | 352 | #endif /* CACHE_H */ |