15 #include <sys/param.h>
16 #include <netinet/in.h>
17 #include <sys/types.h>
23 #if ZLIB_VERNUM < 0x1200
24 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
28 #define DTYPE(de) ((de)->d_type)
34 #define DTYPE(de) DT_UNKNOWN
38 #define NORETURN __attribute__((__noreturn__))
42 #define __attribute__(x)
47 * Intensive research over the course of many years has shown that
48 * port 9418 is totally unused by anything else. Or
50 * Your search - "port 9418" - did not match any documents.
52 * as www.google.com puts it.
54 #define DEFAULT_GIT_PORT 9418
57 * Environment variables transition.
58 * We accept older names for now but warn.
60 extern char *gitenv_bc(const char *);
62 #define gitenv(e) (getenv(e) ? : gitenv_bc(e))
64 #define gitenv(e) (getenv(e) ? getenv(e) : gitenv_bc(e))
68 * Basic data structures for the directory cache
71 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
73 unsigned int hdr_signature
;
74 unsigned int hdr_version
;
75 unsigned int hdr_entries
;
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.
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.
93 * We save the fields in big-endian order to allow using the
94 * index file over NFS transparently.
97 struct cache_time ce_ctime
;
98 struct cache_time ce_mtime
;
101 unsigned int ce_mode
;
104 unsigned int ce_size
;
105 unsigned char sha1
[20];
106 unsigned short ce_flags
;
110 #define CE_NAMEMASK (0x0fff)
111 #define CE_STAGEMASK (0x3000)
112 #define CE_UPDATE (0x4000)
113 #define CE_STAGESHIFT 12
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)
120 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
121 static inline unsigned int create_ce_mode(unsigned int mode
)
124 return htonl(S_IFLNK
);
125 return htonl(S_IFREG
| ce_permissions(mode
));
128 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
130 extern struct cache_entry
**active_cache
;
131 extern unsigned int active_nr
, active_alloc
, active_cache_changed
;
133 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
134 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
135 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
136 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
137 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
139 extern char *get_object_directory(void);
140 extern char *get_refs_directory(void);
141 extern char *get_index_file(void);
142 extern char *get_graft_file(void);
144 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
146 extern const char **get_pathspec(const char *prefix
, char **pathspec
);
147 extern const char *setup_git_directory(void);
148 extern char *prefix_path(const char *prefix
, int len
, char *path
);
150 #define alloc_nr(x) (((x)+16)*3/2)
152 /* Initialize and use the cache information */
153 extern int read_cache(void);
154 extern int write_cache(int newfd
, struct cache_entry
**cache
, int entries
);
155 extern int cache_name_pos(const char *name
, int namelen
);
156 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
157 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
158 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
159 extern int add_cache_entry(struct cache_entry
*ce
, int option
);
160 extern int remove_cache_entry_at(int pos
);
161 extern int remove_file_from_cache(char *path
);
162 extern int ce_same_name(struct cache_entry
*a
, struct cache_entry
*b
);
163 extern int ce_match_stat(struct cache_entry
*ce
, struct stat
*st
);
164 extern int ce_path_match(const struct cache_entry
*ce
, const char **pathspec
);
165 extern int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, const char *type
);
166 extern void fill_stat_cache_info(struct cache_entry
*ce
, struct stat
*st
);
169 struct cache_file
*next
;
170 char lockfile
[PATH_MAX
];
172 extern int hold_index_file_for_update(struct cache_file
*, const char *path
);
173 extern int commit_index_file(struct cache_file
*);
174 extern void rollback_index_file(struct cache_file
*);
176 #define MTIME_CHANGED 0x0001
177 #define CTIME_CHANGED 0x0002
178 #define OWNER_CHANGED 0x0004
179 #define MODE_CHANGED 0x0008
180 #define INODE_CHANGED 0x0010
181 #define DATA_CHANGED 0x0020
182 #define TYPE_CHANGED 0x0040
184 /* Return a statically allocated filename matching the sha1 signature */
185 extern char *mkpath(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
186 extern char *git_path(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
187 extern char *sha1_file_name(const unsigned char *sha1
);
188 extern char *sha1_pack_name(const unsigned char *sha1
);
189 extern char *sha1_pack_index_name(const unsigned char *sha1
);
191 int git_mkstemp(char *path
, size_t n
, const char *template);
193 int safe_create_leading_directories(char *path
);
194 char *safe_strncpy(char *, const char *, size_t);
196 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
197 extern int unpack_sha1_header(z_stream
*stream
, void *map
, unsigned long mapsize
, void *buffer
, unsigned long size
);
198 extern int parse_sha1_header(char *hdr
, char *type
, unsigned long *sizep
);
199 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
200 extern void * unpack_sha1_file(void *map
, unsigned long mapsize
, char *type
, unsigned long *size
);
201 extern void * read_sha1_file(const unsigned char *sha1
, char *type
, unsigned long *size
);
202 extern int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *return_sha1
);
203 extern char *write_sha1_file_prepare(void *buf
,
210 extern int check_sha1_signature(const unsigned char *sha1
, void *buf
, unsigned long size
, const char *type
);
212 /* Read a tree into the cache */
213 extern int read_tree(void *buffer
, unsigned long size
, int stage
, const char **paths
);
215 extern int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
216 size_t bufsize
, size_t *bufposn
);
217 extern int write_sha1_to_fd(int fd
, const unsigned char *sha1
);
219 extern int has_sha1_pack(const unsigned char *sha1
);
220 extern int has_sha1_file(const unsigned char *sha1
);
222 extern int has_pack_file(const unsigned char *sha1
);
223 extern int has_pack_index(const unsigned char *sha1
);
225 /* Convert to/from hex/sha1 representation */
226 extern int get_sha1(const char *str
, unsigned char *sha1
);
227 extern int get_sha1_hex(const char *hex
, unsigned char *sha1
);
228 extern char *sha1_to_hex(const unsigned char *sha1
); /* static buffer result! */
230 /* General helper functions */
231 extern void usage(const char *err
) NORETURN
;
232 extern void die(const char *err
, ...) NORETURN
__attribute__((format (printf
, 1, 2)));
233 extern int error(const char *err
, ...) __attribute__((format (printf
, 1, 2)));
235 extern int base_name_compare(const char *name1
, int len1
, int mode1
, const char *name2
, int len2
, int mode2
);
236 extern int cache_name_compare(const char *name1
, int len1
, const char *name2
, int len2
);
238 extern void *read_object_with_reference(const unsigned char *sha1
,
239 const char *required_type
,
241 unsigned char *sha1_ret
);
243 const char *show_date(unsigned long time
, int timezone
);
244 void parse_date(const char *date
, char *buf
, int bufsize
);
245 void datestamp(char *buf
, int bufsize
);
247 extern int setup_ident(void);
248 extern char *get_ident(const char *name
, const char *email
, const char *date_str
);
249 extern char *git_author_info(void);
250 extern char *git_committer_info(void);
252 static inline void *xmalloc(size_t size
)
254 void *ret
= malloc(size
);
256 die("Out of memory, malloc failed");
260 static inline void *xrealloc(void *ptr
, size_t size
)
262 void *ret
= realloc(ptr
, size
);
264 die("Out of memory, realloc failed");
268 static inline void *xcalloc(size_t nmemb
, size_t size
)
270 void *ret
= calloc(nmemb
, size
);
272 die("Out of memory, calloc failed");
277 const char *base_dir
;
285 extern int checkout_entry(struct cache_entry
*ce
, struct checkout
*state
);
287 extern struct alternate_object_database
{
288 struct alternate_object_database
*next
;
290 char base
[]; /* more */
292 extern void prepare_alt_odb(void);
294 extern struct packed_git
{
295 struct packed_git
*next
;
296 unsigned long index_size
;
297 unsigned long pack_size
;
298 unsigned int *index_base
;
300 unsigned int pack_last_used
;
301 unsigned int pack_use_cnt
;
302 unsigned char sha1
[20];
303 char pack_name
[]; /* something like ".git/objects/pack/xxxxx.pack" */
308 unsigned char sha1
[20];
309 struct packed_git
*p
;
314 unsigned char old_sha1
[20];
315 unsigned char new_sha1
[20];
317 struct ref
*peer_ref
; /* when renaming */
321 extern int git_connect(int fd
[2], char *url
, const char *prog
);
322 extern int finish_connect(pid_t pid
);
323 extern int path_match(const char *path
, int nr
, char **match
);
324 extern int match_refs(struct ref
*src
, struct ref
*dst
, struct ref
***dst_tail
,
325 int nr_refspec
, char **refspec
, int all
);
326 extern int get_ack(int fd
, unsigned char *result_sha1
);
327 extern struct ref
**get_remote_heads(int in
, struct ref
**list
, int nr_match
, char **match
);
329 extern struct packed_git
*parse_pack_index(unsigned char *sha1
);
330 extern struct packed_git
*parse_pack_index_file(unsigned char *sha1
,
333 extern void prepare_packed_git(void);
334 extern void install_packed_git(struct packed_git
*pack
);
336 extern struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
337 struct packed_git
*packs
);
339 extern int use_packed_git(struct packed_git
*);
340 extern void unuse_packed_git(struct packed_git
*);
341 extern struct packed_git
*add_packed_git(char *, int);
342 extern int num_packed_objects(const struct packed_git
*p
);
343 extern int nth_packed_object_sha1(const struct packed_git
*, int, unsigned char*);
344 extern int find_pack_entry_one(const unsigned char *, struct pack_entry
*, struct packed_git
*);
345 extern void *unpack_entry_gently(struct pack_entry
*, char *, unsigned long *);
346 extern void packed_object_info_detail(struct pack_entry
*, char *, unsigned long *, unsigned long *, int *, unsigned char *);
348 /* Dumb servers support */
349 extern int update_server_info(int);