4 #include "git-compat-util.h"
9 #if ZLIB_VERNUM < 0x1200
10 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
13 #if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT)
14 #define DTYPE(de) ((de)->d_type)
24 #define DTYPE(de) DT_UNKNOWN
28 * Intensive research over the course of many years has shown that
29 * port 9418 is totally unused by anything else. Or
31 * Your search - "port 9418" - did not match any documents.
33 * as www.google.com puts it.
35 * This port has been properly assigned for git use by IANA:
36 * git (Assigned-9418) [I06-050728-0001].
38 * git 9418/tcp git pack transfer service
39 * git 9418/udp git pack transfer service
41 * with Linus Torvalds <torvalds@osdl.org> as the point of
42 * contact. September 2005.
44 * See http://www.iana.org/assignments/port-numbers
46 #define DEFAULT_GIT_PORT 9418
49 * Basic data structures for the directory cache
52 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
54 unsigned int hdr_signature
;
55 unsigned int hdr_version
;
56 unsigned int hdr_entries
;
60 * The "cache_time" is just the low 32 bits of the
61 * time. It doesn't matter if it overflows - we only
62 * check it for equality in the 32 bits we save.
70 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
71 * Again - this is just a (very strong in practice) heuristic that
72 * the inode hasn't changed.
74 * We save the fields in big-endian order to allow using the
75 * index file over NFS transparently.
78 struct cache_time ce_ctime
;
79 struct cache_time ce_mtime
;
86 unsigned char sha1
[20];
87 unsigned short ce_flags
;
88 char name
[FLEX_ARRAY
]; /* more */
91 #define CE_NAMEMASK (0x0fff)
92 #define CE_STAGEMASK (0x3000)
93 #define CE_UPDATE (0x4000)
94 #define CE_VALID (0x8000)
95 #define CE_STAGESHIFT 12
97 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
98 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
99 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
100 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
102 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
103 static inline unsigned int create_ce_mode(unsigned int mode
)
106 return htonl(S_IFLNK
);
107 return htonl(S_IFREG
| ce_permissions(mode
));
109 #define canon_mode(mode) \
110 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
111 S_ISLNK(mode) ? S_IFLNK : S_IFDIR)
113 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
115 extern struct cache_entry
**active_cache
;
116 extern unsigned int active_nr
, active_alloc
, active_cache_changed
;
117 extern struct cache_tree
*active_cache_tree
;
118 extern int cache_errno
;
120 extern void setup_git(char *new_git_dir
, char *new_git_object_dir
,
121 char *new_git_index_file
, char *new_git_graft_file
);
123 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
124 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
125 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
126 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
127 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
129 extern char *get_git_dir(void);
130 extern char *get_object_directory(void);
131 extern char *get_refs_directory(void);
132 extern char *get_index_file(void);
133 extern char *get_graft_file(void);
135 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
137 extern const char **get_pathspec(const char *prefix
, const char **pathspec
);
138 extern const char *setup_git_directory_gently(int *);
139 extern const char *setup_git_directory(void);
140 extern const char *prefix_path(const char *prefix
, int len
, const char *path
);
141 extern const char *prefix_filename(const char *prefix
, int len
, const char *path
);
142 extern void verify_filename(const char *prefix
, const char *name
);
143 extern void verify_non_filename(const char *prefix
, const char *name
);
145 #define alloc_nr(x) (((x)+16)*3/2)
147 /* Initialize and use the cache information */
148 extern int read_cache(void);
149 extern int read_cache_from(const char *path
);
150 extern int write_cache(int newfd
, struct cache_entry
**cache
, int entries
);
151 extern int verify_path(const char *path
);
152 extern int cache_name_pos(const char *name
, int namelen
);
153 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
154 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
155 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
156 extern int add_cache_entry(struct cache_entry
*ce
, int option
);
157 extern struct cache_entry
*refresh_cache_entry(struct cache_entry
*ce
, int really
);
158 extern int remove_cache_entry_at(int pos
);
159 extern int remove_file_from_cache(const char *path
);
160 extern int add_file_to_index(const char *path
, int verbose
);
161 extern int ce_same_name(struct cache_entry
*a
, struct cache_entry
*b
);
162 extern int ce_match_stat(struct cache_entry
*ce
, struct stat
*st
, int);
163 extern int ce_modified(struct cache_entry
*ce
, struct stat
*st
, int);
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 int read_pipe(int fd
, char** return_buf
, unsigned long* return_size
);
167 extern int index_pipe(unsigned char *sha1
, int fd
, const char *type
, int write_object
);
168 extern int index_path(unsigned char *sha1
, const char *path
, struct stat
*st
, int write_object
);
169 extern void fill_stat_cache_info(struct cache_entry
*ce
, struct stat
*st
);
171 #define REFRESH_REALLY 0x0001 /* ignore_valid */
172 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
173 #define REFRESH_QUIET 0x0004 /* be quiet about it */
174 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
175 extern int refresh_cache(unsigned int flags
);
178 struct lock_file
*next
;
179 char filename
[PATH_MAX
];
181 extern int hold_lock_file_for_update(struct lock_file
*, const char *path
, int);
182 extern int commit_lock_file(struct lock_file
*);
183 extern void rollback_lock_file(struct lock_file
*);
185 /* Environment bits from configuration mechanism */
186 extern int use_legacy_headers
;
187 extern int trust_executable_bit
;
188 extern int assume_unchanged
;
189 extern int prefer_symlink_refs
;
190 extern int log_all_ref_updates
;
191 extern int warn_ambiguous_refs
;
192 extern int shared_repository
;
193 extern const char *apply_default_whitespace
;
194 extern int zlib_compression_level
;
196 #define GIT_REPO_VERSION 0
197 extern int repository_format_version
;
198 extern int check_repository_format(void);
200 #define MTIME_CHANGED 0x0001
201 #define CTIME_CHANGED 0x0002
202 #define OWNER_CHANGED 0x0004
203 #define MODE_CHANGED 0x0008
204 #define INODE_CHANGED 0x0010
205 #define DATA_CHANGED 0x0020
206 #define TYPE_CHANGED 0x0040
208 /* Return a statically allocated filename matching the sha1 signature */
209 extern char *mkpath(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
210 extern char *git_path(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
211 extern char *sha1_file_name(const unsigned char *sha1
);
212 extern char *sha1_pack_name(const unsigned char *sha1
);
213 extern char *sha1_pack_index_name(const unsigned char *sha1
);
214 extern const char *find_unique_abbrev(const unsigned char *sha1
, int);
215 extern const unsigned char null_sha1
[20];
217 int git_mkstemp(char *path
, size_t n
, const char *template);
224 int git_config_perm(const char *var
, const char *value
);
225 int adjust_shared_perm(const char *path
);
226 int safe_create_leading_directories(char *path
);
227 char *enter_repo(char *path
, int strict
);
229 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
230 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
231 extern void * unpack_sha1_file(void *map
, unsigned long mapsize
, char *type
, unsigned long *size
);
232 extern void * read_sha1_file(const unsigned char *sha1
, char *type
, unsigned long *size
);
233 extern int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *return_sha1
);
234 extern char *write_sha1_file_prepare(void *buf
,
241 extern int check_sha1_signature(const unsigned char *sha1
, void *buf
, unsigned long size
, const char *type
);
243 extern int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
244 size_t bufsize
, size_t *bufposn
);
245 extern int write_sha1_to_fd(int fd
, const unsigned char *sha1
);
246 extern int move_temp_to_file(const char *tmpfile
, char *filename
);
248 extern int has_sha1_pack(const unsigned char *sha1
);
249 extern int has_sha1_file(const unsigned char *sha1
);
250 extern void *map_sha1_file(const unsigned char *sha1
, unsigned long *);
251 extern int legacy_loose_object(unsigned char *);
253 extern int has_pack_file(const unsigned char *sha1
);
254 extern int has_pack_index(const unsigned char *sha1
);
256 /* Convert to/from hex/sha1 representation */
257 #define MINIMUM_ABBREV 4
258 #define DEFAULT_ABBREV 7
260 extern int get_sha1(const char *str
, unsigned char *sha1
);
261 extern int get_sha1_hex(const char *hex
, unsigned char *sha1
);
262 extern char *sha1_to_hex(const unsigned char *sha1
); /* static buffer result! */
263 extern int read_ref(const char *filename
, unsigned char *sha1
);
264 extern const char *resolve_ref(const char *path
, unsigned char *sha1
, int);
265 extern int create_symref(const char *git_HEAD
, const char *refs_heads_master
);
266 extern int validate_symref(const char *git_HEAD
);
268 extern int base_name_compare(const char *name1
, int len1
, int mode1
, const char *name2
, int len2
, int mode2
);
269 extern int cache_name_compare(const char *name1
, int len1
, const char *name2
, int len2
);
271 extern void *read_object_with_reference(const unsigned char *sha1
,
272 const char *required_type
,
274 unsigned char *sha1_ret
);
276 const char *show_date(unsigned long time
, int timezone
);
277 const char *show_rfc2822_date(unsigned long time
, int timezone
);
278 int parse_date(const char *date
, char *buf
, int bufsize
);
279 void datestamp(char *buf
, int bufsize
);
280 unsigned long approxidate(const char *);
282 extern int setup_ident(void);
283 extern const char *git_author_info(int);
284 extern const char *git_committer_info(int);
287 const char *base_dir
;
295 extern int checkout_entry(struct cache_entry
*ce
, struct checkout
*state
, char *topath
);
297 extern struct alternate_object_database
{
298 struct alternate_object_database
*next
;
300 char base
[FLEX_ARRAY
]; /* more */
302 extern void prepare_alt_odb(void);
304 extern struct packed_git
{
305 struct packed_git
*next
;
306 unsigned long index_size
;
307 unsigned long pack_size
;
308 unsigned int *index_base
;
310 unsigned int pack_last_used
;
311 unsigned int pack_use_cnt
;
313 unsigned char sha1
[20];
314 /* something like ".git/objects/pack/xxxxx.pack" */
315 char pack_name
[FLEX_ARRAY
]; /* more */
320 unsigned char sha1
[20];
321 struct packed_git
*p
;
326 unsigned char old_sha1
[20];
327 unsigned char new_sha1
[20];
329 struct ref
*peer_ref
; /* when renaming */
330 char name
[FLEX_ARRAY
]; /* more */
333 #define REF_NORMAL (1u << 0)
334 #define REF_HEADS (1u << 1)
335 #define REF_TAGS (1u << 2)
337 extern int git_connect(int fd
[2], char *url
, const char *prog
);
338 extern int finish_connect(pid_t pid
);
339 extern int path_match(const char *path
, int nr
, char **match
);
340 extern int match_refs(struct ref
*src
, struct ref
*dst
, struct ref
***dst_tail
,
341 int nr_refspec
, char **refspec
, int all
);
342 extern int get_ack(int fd
, unsigned char *result_sha1
);
343 extern struct ref
**get_remote_heads(int in
, struct ref
**list
, int nr_match
, char **match
, unsigned int flags
);
344 extern int server_supports(const char *feature
);
346 extern struct packed_git
*parse_pack_index(unsigned char *sha1
);
347 extern struct packed_git
*parse_pack_index_file(const unsigned char *sha1
,
350 extern void prepare_packed_git(void);
351 extern void install_packed_git(struct packed_git
*pack
);
353 extern struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
354 struct packed_git
*packs
);
356 extern int use_packed_git(struct packed_git
*);
357 extern void unuse_packed_git(struct packed_git
*);
358 extern struct packed_git
*add_packed_git(char *, int, int);
359 extern int num_packed_objects(const struct packed_git
*p
);
360 extern int nth_packed_object_sha1(const struct packed_git
*, int, unsigned char*);
361 extern int find_pack_entry_one(const unsigned char *, struct pack_entry
*, struct packed_git
*);
362 extern void *unpack_entry_gently(struct pack_entry
*, char *, unsigned long *);
363 extern void packed_object_info_detail(struct pack_entry
*, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
365 /* Dumb servers support */
366 extern int update_server_info(int);
368 typedef int (*config_fn_t
)(const char *, const char *);
369 extern int git_default_config(const char *, const char *);
370 extern int git_config_from_file(config_fn_t fn
, const char *);
371 extern int git_config(config_fn_t fn
);
372 extern int git_config_int(const char *, const char *);
373 extern int git_config_bool(const char *, const char *);
374 extern int git_config_set(const char *, const char *);
375 extern int git_config_set_multivar(const char *, const char *, const char *, int);
376 extern int check_repository_format_version(const char *var
, const char *value
);
378 #define MAX_GITNAME (1000)
379 extern char git_default_email
[MAX_GITNAME
];
380 extern char git_default_name
[MAX_GITNAME
];
382 #define MAX_ENCODING_LENGTH 64
383 extern char git_commit_encoding
[MAX_ENCODING_LENGTH
];
385 extern int copy_fd(int ifd
, int ofd
);
387 /* Finish off pack transfer receiving end */
388 extern int receive_unpack_pack(int fd
[2], const char *me
, int quiet
, int);
389 extern int receive_keep_pack(int fd
[2], const char *me
, int quiet
, int);
392 extern void setup_pager(void);
393 extern int pager_in_use
;
394 extern int pager_use_color
;
397 int decode_85(char *dst
, char *line
, int linelen
);
398 void encode_85(char *buf
, unsigned char *data
, int bytes
);
405 extern struct blob
*alloc_blob_node(void);
406 extern struct tree
*alloc_tree_node(void);
407 extern struct commit
*alloc_commit_node(void);
408 extern struct tag
*alloc_tag_node(void);
409 extern void alloc_report(void);