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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 | |
41 | #endif | |
42 | ||
4ec99bf0 TS |
43 | #ifndef __attribute__ |
44 | #define __attribute(x) | |
45 | #endif | |
46 | ||
2386d658 LT |
47 | /* |
48 | * Intensive research over the course of many years has shown that | |
49 | * port 9418 is totally unused by anything else. Or | |
50 | * | |
51 | * Your search - "port 9418" - did not match any documents. | |
52 | * | |
53 | * as www.google.com puts it. | |
54 | */ | |
55 | #define DEFAULT_GIT_PORT 9418 | |
56 | ||
d19938ab JH |
57 | /* |
58 | * Environment variables transition. | |
59 | * We accept older names for now but warn. | |
60 | */ | |
61 | extern char *gitenv_bc(const char *); | |
62 | #define gitenv(e) (getenv(e) ? : gitenv_bc(e)) | |
63 | ||
e83c5163 LT |
64 | /* |
65 | * Basic data structures for the directory cache | |
e83c5163 LT |
66 | */ |
67 | ||
68 | #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */ | |
69 | struct cache_header { | |
ccc4feb5 LT |
70 | unsigned int hdr_signature; |
71 | unsigned int hdr_version; | |
72 | unsigned int hdr_entries; | |
e83c5163 LT |
73 | }; |
74 | ||
75 | /* | |
76 | * The "cache_time" is just the low 32 bits of the | |
77 | * time. It doesn't matter if it overflows - we only | |
78 | * check it for equality in the 32 bits we save. | |
79 | */ | |
80 | struct cache_time { | |
81 | unsigned int sec; | |
82 | unsigned int nsec; | |
83 | }; | |
84 | ||
85 | /* | |
86 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
87 | * Again - this is just a (very strong in practice) heuristic that | |
88 | * the inode hasn't changed. | |
ccc4feb5 LT |
89 | * |
90 | * We save the fields in big-endian order to allow using the | |
91 | * index file over NFS transparently. | |
e83c5163 LT |
92 | */ |
93 | struct cache_entry { | |
ccc4feb5 LT |
94 | struct cache_time ce_ctime; |
95 | struct cache_time ce_mtime; | |
96 | unsigned int ce_dev; | |
97 | unsigned int ce_ino; | |
98 | unsigned int ce_mode; | |
99 | unsigned int ce_uid; | |
100 | unsigned int ce_gid; | |
101 | unsigned int ce_size; | |
e83c5163 | 102 | unsigned char sha1[20]; |
f5cabd13 | 103 | unsigned short ce_flags; |
59c1e249 | 104 | char name[0]; |
e83c5163 LT |
105 | }; |
106 | ||
95fd5bf8 LT |
107 | #define CE_NAMEMASK (0x0fff) |
108 | #define CE_STAGEMASK (0x3000) | |
220a0b52 | 109 | #define CE_UPDATE (0x4000) |
aee46198 | 110 | #define CE_STAGESHIFT 12 |
95fd5bf8 | 111 | |
aee46198 JH |
112 | #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT)) |
113 | #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags)) | |
114 | #define ce_size(ce) cache_entry_size(ce_namelen(ce)) | |
115 | #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT) | |
116 | ||
e4479470 | 117 | #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) |
8ae0a8c5 KS |
118 | static inline unsigned int create_ce_mode(unsigned int mode) |
119 | { | |
8ae0a8c5 KS |
120 | if (S_ISLNK(mode)) |
121 | return htonl(S_IFLNK); | |
db823d4a | 122 | return htonl(S_IFREG | ce_permissions(mode)); |
8ae0a8c5 | 123 | } |
e4479470 | 124 | |
aee46198 | 125 | #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7) |
f5cabd13 | 126 | |
88355048 PB |
127 | extern struct cache_entry **active_cache; |
128 | extern unsigned int active_nr, active_alloc, active_cache_changed; | |
e83c5163 | 129 | |
8ac069ac JH |
130 | #define GIT_DIR_ENVIRONMENT "GIT_DIR" |
131 | #define DEFAULT_GIT_DIR_ENVIRONMENT ".git" | |
d19938ab | 132 | #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY" |
bb233d69 | 133 | #define INDEX_ENVIRONMENT "GIT_INDEX_FILE" |
5da5c8f4 | 134 | #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE" |
bb233d69 | 135 | |
8ac069ac | 136 | extern char *get_object_directory(void); |
95fc7512 | 137 | extern char *get_refs_directory(void); |
8ac069ac | 138 | extern char *get_index_file(void); |
5da5c8f4 | 139 | extern char *get_graft_file(void); |
8ac069ac JH |
140 | |
141 | #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES" | |
bb233d69 | 142 | |
d288a700 LT |
143 | extern const char **get_pathspec(const char *prefix, char **pathspec); |
144 | extern const char *setup_git_directory(void); | |
828cc617 | 145 | extern char *prefix_path(const char *prefix, int len, char *path); |
d288a700 | 146 | |
e83c5163 LT |
147 | #define alloc_nr(x) (((x)+16)*3/2) |
148 | ||
734aab75 | 149 | /* Initialize and use the cache information */ |
e83c5163 | 150 | extern int read_cache(void); |
197ee8c9 | 151 | extern int write_cache(int newfd, struct cache_entry **cache, int entries); |
eb38c22f | 152 | extern int cache_name_pos(const char *name, int namelen); |
192268c1 JH |
153 | #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */ |
154 | #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */ | |
b155725d | 155 | #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */ |
192268c1 | 156 | extern int add_cache_entry(struct cache_entry *ce, int option); |
dbbce55b | 157 | extern int remove_cache_entry_at(int pos); |
197ee8c9 | 158 | extern int remove_file_from_cache(char *path); |
dbbce55b | 159 | extern int ce_same_name(struct cache_entry *a, struct cache_entry *b); |
5d728c84 | 160 | extern int ce_match_stat(struct cache_entry *ce, struct stat *st); |
c0fd1f51 | 161 | extern int ce_path_match(const struct cache_entry *ce, const char **pathspec); |
7672db20 | 162 | extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type); |
415e96c8 JH |
163 | extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); |
164 | ||
165 | struct cache_file { | |
166 | struct cache_file *next; | |
167 | char lockfile[PATH_MAX]; | |
168 | }; | |
169 | extern int hold_index_file_for_update(struct cache_file *, const char *path); | |
170 | extern int commit_index_file(struct cache_file *); | |
171 | extern void rollback_index_file(struct cache_file *); | |
734aab75 LT |
172 | |
173 | #define MTIME_CHANGED 0x0001 | |
174 | #define CTIME_CHANGED 0x0002 | |
175 | #define OWNER_CHANGED 0x0004 | |
176 | #define MODE_CHANGED 0x0008 | |
177 | #define INODE_CHANGED 0x0010 | |
178 | #define DATA_CHANGED 0x0020 | |
8ae0a8c5 | 179 | #define TYPE_CHANGED 0x0040 |
e83c5163 LT |
180 | |
181 | /* Return a statically allocated filename matching the sha1 signature */ | |
4ec99bf0 TS |
182 | extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2))); |
183 | extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2))); | |
73134b6d | 184 | extern char *sha1_file_name(const unsigned char *sha1); |
bf592c50 DB |
185 | extern char *sha1_pack_name(const unsigned char *sha1); |
186 | extern char *sha1_pack_index_name(const unsigned char *sha1); | |
e83c5163 | 187 | |
f2db68ed HE |
188 | int git_mkstemp(char *path, size_t n, const char *template); |
189 | ||
b2cb9425 | 190 | int safe_create_leading_directories(char *path); |
f2db68ed | 191 | char *safe_strncpy(char *, const char *, size_t); |
b2cb9425 | 192 | |
e83c5163 | 193 | /* Read and unpack a sha1 file into memory, write memory to a sha1 file */ |
c4483576 | 194 | extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size); |
5180cacc | 195 | extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep); |
36e4d74a | 196 | extern int sha1_object_info(const unsigned char *, char *, unsigned long *); |
2ade9340 | 197 | extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size); |
73134b6d | 198 | extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size); |
bf0f910d | 199 | extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1); |
7672db20 BL |
200 | extern char *write_sha1_file_prepare(void *buf, |
201 | unsigned long len, | |
202 | const char *type, | |
203 | unsigned char *sha1, | |
204 | unsigned char *hdr, | |
205 | int *hdrlen); | |
8237b185 | 206 | |
5d6ccf5c | 207 | extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type); |
e83c5163 | 208 | |
94537c78 | 209 | /* Read a tree into the cache */ |
3e587635 | 210 | extern int read_tree(void *buffer, unsigned long size, int stage, const char **paths); |
94537c78 | 211 | |
70b9829e DB |
212 | extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer, |
213 | size_t bufsize, size_t *bufposn); | |
a5eda52b | 214 | extern int write_sha1_to_fd(int fd, const unsigned char *sha1); |
8237b185 | 215 | |
dade09c2 | 216 | extern int has_sha1_pack(const unsigned char *sha1); |
8237b185 DB |
217 | extern int has_sha1_file(const unsigned char *sha1); |
218 | ||
bf592c50 DB |
219 | extern int has_pack_file(const unsigned char *sha1); |
220 | extern int has_pack_index(const unsigned char *sha1); | |
221 | ||
e83c5163 | 222 | /* Convert to/from hex/sha1 representation */ |
3c249c95 | 223 | extern int get_sha1(const char *str, unsigned char *sha1); |
197ee8c9 LT |
224 | extern int get_sha1_hex(const char *hex, unsigned char *sha1); |
225 | extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */ | |
e83c5163 LT |
226 | |
227 | /* General helper functions */ | |
90334cf7 | 228 | extern void usage(const char *err) NORETURN; |
4ec99bf0 TS |
229 | extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2))); |
230 | extern int error(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
2de381f9 | 231 | |
958ba6c9 | 232 | extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2); |
79517a06 | 233 | extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2); |
e83c5163 | 234 | |
40469ee9 | 235 | extern void *read_object_with_reference(const unsigned char *sha1, |
bf0f910d | 236 | const char *required_type, |
40469ee9 JH |
237 | unsigned long *size, |
238 | unsigned char *sha1_ret); | |
f4913f91 | 239 | |
f80cd783 | 240 | const char *show_date(unsigned long time, int timezone); |
26a2d8ae | 241 | void parse_date(const char *date, char *buf, int bufsize); |
ecee9d9e ET |
242 | void datestamp(char *buf, int bufsize); |
243 | ||
6aa33f40 LT |
244 | extern int setup_ident(void); |
245 | extern char *get_ident(const char *name, const char *email, const char *date_str); | |
d289d136 EB |
246 | extern char *git_author_info(void); |
247 | extern char *git_committer_info(void); | |
6aa33f40 | 248 | |
127cfd0d | 249 | static inline void *xmalloc(size_t size) |
812666c8 CL |
250 | { |
251 | void *ret = malloc(size); | |
252 | if (!ret) | |
253 | die("Out of memory, malloc failed"); | |
254 | return ret; | |
255 | } | |
256 | ||
127cfd0d | 257 | static inline void *xrealloc(void *ptr, size_t size) |
812666c8 CL |
258 | { |
259 | void *ret = realloc(ptr, size); | |
260 | if (!ret) | |
261 | die("Out of memory, realloc failed"); | |
262 | return ret; | |
263 | } | |
264 | ||
127cfd0d BR |
265 | static inline void *xcalloc(size_t nmemb, size_t size) |
266 | { | |
267 | void *ret = calloc(nmemb, size); | |
268 | if (!ret) | |
269 | die("Out of memory, calloc failed"); | |
270 | return ret; | |
271 | } | |
272 | ||
12dccc16 LT |
273 | struct checkout { |
274 | const char *base_dir; | |
275 | int base_dir_len; | |
276 | unsigned force:1, | |
277 | quiet:1, | |
278 | not_new:1, | |
279 | refresh_cache:1; | |
280 | }; | |
281 | ||
282 | extern int checkout_entry(struct cache_entry *ce, struct checkout *state); | |
283 | ||
9a217f2a | 284 | extern struct alternate_object_database { |
d5a63b99 | 285 | struct alternate_object_database *next; |
9a217f2a | 286 | char *name; |
d5a63b99 JH |
287 | char base[0]; /* more */ |
288 | } *alt_odb_list; | |
9a217f2a JH |
289 | extern void prepare_alt_odb(void); |
290 | ||
291 | extern struct packed_git { | |
292 | struct packed_git *next; | |
293 | unsigned long index_size; | |
294 | unsigned long pack_size; | |
295 | unsigned int *index_base; | |
296 | void *pack_base; | |
297 | unsigned int pack_last_used; | |
f9253394 | 298 | unsigned int pack_use_cnt; |
bf592c50 | 299 | unsigned char sha1[20]; |
9a217f2a JH |
300 | char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */ |
301 | } *packed_git; | |
f3bf9224 JH |
302 | |
303 | struct pack_entry { | |
304 | unsigned int offset; | |
305 | unsigned char sha1[20]; | |
306 | struct packed_git *p; | |
307 | }; | |
308 | ||
d1c133f5 LT |
309 | struct ref { |
310 | struct ref *next; | |
311 | unsigned char old_sha1[20]; | |
312 | unsigned char new_sha1[20]; | |
f88395ac | 313 | struct ref *peer_ref; /* when renaming */ |
d1c133f5 LT |
314 | char name[0]; |
315 | }; | |
316 | ||
f7192598 LT |
317 | extern int git_connect(int fd[2], char *url, const char *prog); |
318 | extern int finish_connect(pid_t pid); | |
013e7c7f | 319 | extern int path_match(const char *path, int nr, char **match); |
f88395ac JH |
320 | extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail, |
321 | int nr_refspec, char **refspec, int all); | |
41cb7488 | 322 | extern int get_ack(int fd, unsigned char *result_sha1); |
d1c133f5 | 323 | extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match); |
f7192598 | 324 | |
bf592c50 | 325 | extern struct packed_git *parse_pack_index(unsigned char *sha1); |
c508df5e DB |
326 | extern struct packed_git *parse_pack_index_file(unsigned char *sha1, |
327 | char *idx_path); | |
bf592c50 | 328 | |
9a217f2a | 329 | extern void prepare_packed_git(void); |
bf592c50 DB |
330 | extern void install_packed_git(struct packed_git *pack); |
331 | ||
332 | extern struct packed_git *find_sha1_pack(const unsigned char *sha1, | |
333 | struct packed_git *packs); | |
334 | ||
f9253394 JH |
335 | extern int use_packed_git(struct packed_git *); |
336 | extern void unuse_packed_git(struct packed_git *); | |
337 | extern struct packed_git *add_packed_git(char *, int); | |
9a217f2a JH |
338 | extern int num_packed_objects(const struct packed_git *p); |
339 | extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*); | |
f3bf9224 JH |
340 | extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *); |
341 | extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *); | |
ad8c80a5 | 342 | extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, int *, unsigned char *); |
9a217f2a | 343 | |
8f3f9b09 JH |
344 | /* Dumb servers support */ |
345 | extern int update_server_info(int); | |
346 | ||
e83c5163 | 347 | #endif /* CACHE_H */ |