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 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
121 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
122 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
123 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
124 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
125 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
126 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
127 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
128 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
130 extern int is_bare_git_dir(const char *dir
);
131 extern const char *get_git_dir(void);
132 extern char *get_object_directory(void);
133 extern char *get_refs_directory(void);
134 extern char *get_index_file(void);
135 extern char *get_graft_file(void);
137 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
139 extern const char **get_pathspec(const char *prefix
, const char **pathspec
);
140 extern const char *setup_git_directory_gently(int *);
141 extern const char *setup_git_directory(void);
142 extern const char *prefix_path(const char *prefix
, int len
, const char *path
);
143 extern const char *prefix_filename(const char *prefix
, int len
, const char *path
);
144 extern void verify_filename(const char *prefix
, const char *name
);
145 extern void verify_non_filename(const char *prefix
, const char *name
);
147 #define alloc_nr(x) (((x)+16)*3/2)
149 /* Initialize and use the cache information */
150 extern int read_cache(void);
151 extern int read_cache_from(const char *path
);
152 extern int write_cache(int newfd
, struct cache_entry
**cache
, int entries
);
153 extern int discard_cache(void);
154 extern int verify_path(const char *path
);
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 struct cache_entry
*refresh_cache_entry(struct cache_entry
*ce
, int really
);
161 extern int remove_cache_entry_at(int pos
);
162 extern int remove_file_from_cache(const char *path
);
163 extern int add_file_to_index(const char *path
, int verbose
);
164 extern int ce_same_name(struct cache_entry
*a
, struct cache_entry
*b
);
165 extern int ce_match_stat(struct cache_entry
*ce
, struct stat
*st
, int);
166 extern int ce_modified(struct cache_entry
*ce
, struct stat
*st
, int);
167 extern int ce_path_match(const struct cache_entry
*ce
, const char **pathspec
);
168 extern int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, const char *type
);
169 extern int read_pipe(int fd
, char** return_buf
, unsigned long* return_size
);
170 extern int index_pipe(unsigned char *sha1
, int fd
, const char *type
, int write_object
);
171 extern int index_path(unsigned char *sha1
, const char *path
, struct stat
*st
, int write_object
);
172 extern void fill_stat_cache_info(struct cache_entry
*ce
, struct stat
*st
);
174 #define REFRESH_REALLY 0x0001 /* ignore_valid */
175 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
176 #define REFRESH_QUIET 0x0004 /* be quiet about it */
177 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
178 extern int refresh_cache(unsigned int flags
);
181 struct lock_file
*next
;
183 char filename
[PATH_MAX
];
185 extern int hold_lock_file_for_update(struct lock_file
*, const char *path
, int);
186 extern int commit_lock_file(struct lock_file
*);
187 extern void rollback_lock_file(struct lock_file
*);
188 extern int delete_ref(const char *, unsigned char *sha1
);
190 /* Environment bits from configuration mechanism */
191 extern int use_legacy_headers
;
192 extern int trust_executable_bit
;
193 extern int assume_unchanged
;
194 extern int prefer_symlink_refs
;
195 extern int log_all_ref_updates
;
196 extern int warn_ambiguous_refs
;
197 extern int shared_repository
;
198 extern const char *apply_default_whitespace
;
199 extern int zlib_compression_level
;
200 extern size_t packed_git_window_size
;
201 extern size_t packed_git_limit
;
203 #define GIT_REPO_VERSION 0
204 extern int repository_format_version
;
205 extern int check_repository_format(void);
207 #define MTIME_CHANGED 0x0001
208 #define CTIME_CHANGED 0x0002
209 #define OWNER_CHANGED 0x0004
210 #define MODE_CHANGED 0x0008
211 #define INODE_CHANGED 0x0010
212 #define DATA_CHANGED 0x0020
213 #define TYPE_CHANGED 0x0040
215 /* Return a statically allocated filename matching the sha1 signature */
216 extern char *mkpath(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
217 extern char *git_path(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
218 extern char *sha1_file_name(const unsigned char *sha1
);
219 extern char *sha1_pack_name(const unsigned char *sha1
);
220 extern char *sha1_pack_index_name(const unsigned char *sha1
);
221 extern const char *find_unique_abbrev(const unsigned char *sha1
, int);
222 extern const unsigned char null_sha1
[20];
223 static inline int is_null_sha1(const unsigned char *sha1
)
225 return !memcmp(sha1
, null_sha1
, 20);
227 static inline int hashcmp(const unsigned char *sha1
, const unsigned char *sha2
)
229 return memcmp(sha1
, sha2
, 20);
231 static inline void hashcpy(unsigned char *sha_dst
, const unsigned char *sha_src
)
233 memcpy(sha_dst
, sha_src
, 20);
235 static inline void hashclr(unsigned char *hash
)
240 int git_mkstemp(char *path
, size_t n
, const char *template);
247 int git_config_perm(const char *var
, const char *value
);
248 int adjust_shared_perm(const char *path
);
249 int safe_create_leading_directories(char *path
);
250 char *enter_repo(char *path
, int strict
);
252 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
253 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
254 extern void * unpack_sha1_file(void *map
, unsigned long mapsize
, char *type
, unsigned long *size
);
255 extern void * read_sha1_file(const unsigned char *sha1
, char *type
, unsigned long *size
);
256 extern int hash_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *sha1
);
257 extern int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *return_sha1
);
259 extern int check_sha1_signature(const unsigned char *sha1
, void *buf
, unsigned long size
, const char *type
);
261 extern int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
262 size_t bufsize
, size_t *bufposn
);
263 extern int write_sha1_to_fd(int fd
, const unsigned char *sha1
);
264 extern int move_temp_to_file(const char *tmpfile
, const char *filename
);
266 extern int has_sha1_pack(const unsigned char *sha1
, const char **ignore
);
267 extern int has_sha1_file(const unsigned char *sha1
);
268 extern void *map_sha1_file(const unsigned char *sha1
, unsigned long *);
269 extern int legacy_loose_object(unsigned char *);
271 extern int has_pack_file(const unsigned char *sha1
);
272 extern int has_pack_index(const unsigned char *sha1
);
280 /* 5 for future expansion */
286 extern signed char hexval_table
[256];
287 static inline unsigned int hexval(unsigned int c
)
289 return hexval_table
[c
];
292 /* Convert to/from hex/sha1 representation */
293 #define MINIMUM_ABBREV 4
294 #define DEFAULT_ABBREV 7
296 extern int get_sha1(const char *str
, unsigned char *sha1
);
297 extern int get_sha1_hex(const char *hex
, unsigned char *sha1
);
298 extern char *sha1_to_hex(const unsigned char *sha1
); /* static buffer result! */
299 extern int read_ref(const char *filename
, unsigned char *sha1
);
300 extern const char *resolve_ref(const char *path
, unsigned char *sha1
, int, int *);
301 extern int create_symref(const char *ref
, const char *refs_heads_master
);
302 extern int validate_headref(const char *ref
);
304 extern int base_name_compare(const char *name1
, int len1
, int mode1
, const char *name2
, int len2
, int mode2
);
305 extern int cache_name_compare(const char *name1
, int len1
, const char *name2
, int len2
);
307 extern void *read_object_with_reference(const unsigned char *sha1
,
308 const char *required_type
,
310 unsigned char *sha1_ret
);
312 const char *show_date(unsigned long time
, int timezone
, int relative
);
313 const char *show_rfc2822_date(unsigned long time
, int timezone
);
314 int parse_date(const char *date
, char *buf
, int bufsize
);
315 void datestamp(char *buf
, int bufsize
);
316 unsigned long approxidate(const char *);
318 extern int setup_ident(void);
319 extern void ignore_missing_committer_name();
320 extern const char *git_author_info(int);
321 extern const char *git_committer_info(int);
324 const char *base_dir
;
332 extern int checkout_entry(struct cache_entry
*ce
, struct checkout
*state
, char *topath
);
334 extern struct alternate_object_database
{
335 struct alternate_object_database
*next
;
337 char base
[FLEX_ARRAY
]; /* more */
339 extern void prepare_alt_odb(void);
342 struct pack_window
*next
;
346 unsigned int last_used
;
347 unsigned int inuse_cnt
;
350 extern struct packed_git
{
351 struct packed_git
*next
;
352 struct pack_window
*windows
;
353 unsigned int *index_base
;
358 unsigned char sha1
[20];
359 /* something like ".git/objects/pack/xxxxx.pack" */
360 char pack_name
[FLEX_ARRAY
]; /* more */
365 unsigned char sha1
[20];
366 struct packed_git
*p
;
371 unsigned char old_sha1
[20];
372 unsigned char new_sha1
[20];
374 struct ref
*peer_ref
; /* when renaming */
375 char name
[FLEX_ARRAY
]; /* more */
378 #define REF_NORMAL (1u << 0)
379 #define REF_HEADS (1u << 1)
380 #define REF_TAGS (1u << 2)
382 extern pid_t
git_connect(int fd
[2], char *url
, const char *prog
);
383 extern int finish_connect(pid_t pid
);
384 extern int path_match(const char *path
, int nr
, char **match
);
385 extern int match_refs(struct ref
*src
, struct ref
*dst
, struct ref
***dst_tail
,
386 int nr_refspec
, char **refspec
, int all
);
387 extern int get_ack(int fd
, unsigned char *result_sha1
);
388 extern struct ref
**get_remote_heads(int in
, struct ref
**list
, int nr_match
, char **match
, unsigned int flags
);
389 extern int server_supports(const char *feature
);
391 extern struct packed_git
*parse_pack_index(unsigned char *sha1
);
392 extern struct packed_git
*parse_pack_index_file(const unsigned char *sha1
,
395 extern void prepare_packed_git(void);
396 extern void reprepare_packed_git(void);
397 extern void install_packed_git(struct packed_git
*pack
);
399 extern struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
400 struct packed_git
*packs
);
402 extern void pack_report();
403 extern unsigned char* use_pack(struct packed_git
*, struct pack_window
**, unsigned long, unsigned int *);
404 extern void unuse_pack(struct pack_window
**);
405 extern struct packed_git
*add_packed_git(char *, int, int);
406 extern int num_packed_objects(const struct packed_git
*p
);
407 extern int nth_packed_object_sha1(const struct packed_git
*, int, unsigned char*);
408 extern unsigned long find_pack_entry_one(const unsigned char *, struct packed_git
*);
409 extern void *unpack_entry(struct packed_git
*, unsigned long, char *, unsigned long *);
410 extern unsigned long unpack_object_header_gently(const unsigned char *buf
, unsigned long len
, enum object_type
*type
, unsigned long *sizep
);
411 extern void packed_object_info_detail(struct packed_git
*, unsigned long, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
413 /* Dumb servers support */
414 extern int update_server_info(int);
416 typedef int (*config_fn_t
)(const char *, const char *);
417 extern int git_default_config(const char *, const char *);
418 extern int git_config_from_file(config_fn_t fn
, const char *);
419 extern int git_config(config_fn_t fn
);
420 extern int git_config_int(const char *, const char *);
421 extern int git_config_bool(const char *, const char *);
422 extern int git_config_set(const char *, const char *);
423 extern int git_config_set_multivar(const char *, const char *, const char *, int);
424 extern int git_config_rename_section(const char *, const char *);
425 extern int check_repository_format_version(const char *var
, const char *value
);
427 #define MAX_GITNAME (1000)
428 extern char git_default_email
[MAX_GITNAME
];
429 extern char git_default_name
[MAX_GITNAME
];
431 extern char *git_commit_encoding
;
432 extern char *git_log_output_encoding
;
434 extern int copy_fd(int ifd
, int ofd
);
435 extern int read_in_full(int fd
, void *buf
, size_t count
);
436 extern void read_or_die(int fd
, void *buf
, size_t count
);
437 extern int write_in_full(int fd
, const void *buf
, size_t count
);
438 extern void write_or_die(int fd
, const void *buf
, size_t count
);
439 extern int write_or_whine(int fd
, const void *buf
, size_t count
, const char *msg
);
440 extern int write_or_whine_pipe(int fd
, const void *buf
, size_t count
, const char *msg
);
443 extern void setup_pager(void);
444 extern int pager_in_use
;
445 extern int pager_use_color
;
448 int decode_85(char *dst
, char *line
, int linelen
);
449 void encode_85(char *buf
, unsigned char *data
, int bytes
);
456 extern struct blob
*alloc_blob_node(void);
457 extern struct tree
*alloc_tree_node(void);
458 extern struct commit
*alloc_commit_node(void);
459 extern struct tag
*alloc_tag_node(void);
460 extern void alloc_report(void);
463 extern int nfvasprintf(char **str
, const char *fmt
, va_list va
);
464 extern void trace_printf(const char *format
, ...);
465 extern void trace_argv_printf(const char **argv
, int count
, const char *format
, ...);