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
27 /* unknown mode (impossible combination S_IFIFO|S_IFCHR) */
28 #define S_IFINVALID 0030000
31 * A "directory link" is a link to another git directory.
33 * The value 0160000 is not normally a valid mode, and
34 * also just happens to be S_IFDIR + S_IFLNK
36 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
37 * always having the same values everywhere. We should use
38 * our internal git values for these things, and then we can
39 * translate that to the OS-specific value. It just so
40 * happens that everybody shares the same bit representation
41 * in the UNIX world (and apparently wider too..)
43 #define S_IFDIRLNK 0160000
44 #define S_ISDIRLNK(m) (((m) & S_IFMT) == S_IFDIRLNK)
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 * This port has been properly assigned for git use by IANA:
55 * git (Assigned-9418) [I06-050728-0001].
57 * git 9418/tcp git pack transfer service
58 * git 9418/udp git pack transfer service
60 * with Linus Torvalds <torvalds@osdl.org> as the point of
61 * contact. September 2005.
63 * See http://www.iana.org/assignments/port-numbers
65 #define DEFAULT_GIT_PORT 9418
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
;
107 char name
[FLEX_ARRAY
]; /* more */
110 #define CE_NAMEMASK (0x0fff)
111 #define CE_STAGEMASK (0x3000)
112 #define CE_UPDATE (0x4000)
113 #define CE_VALID (0x8000)
114 #define CE_STAGESHIFT 12
116 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
117 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
118 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
119 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
121 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
122 static inline unsigned int create_ce_mode(unsigned int mode
)
125 return htonl(S_IFLNK
);
126 if (S_ISDIR(mode
) || S_ISDIRLNK(mode
))
127 return htonl(S_IFDIRLNK
);
128 return htonl(S_IFREG
| ce_permissions(mode
));
130 static inline unsigned int ce_mode_from_stat(struct cache_entry
*ce
, unsigned int mode
)
132 extern int trust_executable_bit
, has_symlinks
;
133 if (!has_symlinks
&& S_ISREG(mode
) &&
134 ce
&& S_ISLNK(ntohl(ce
->ce_mode
)))
136 if (!trust_executable_bit
&& S_ISREG(mode
)) {
137 if (ce
&& S_ISREG(ntohl(ce
->ce_mode
)))
139 return create_ce_mode(0666);
141 return create_ce_mode(mode
);
143 #define canon_mode(mode) \
144 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
145 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFDIRLNK)
147 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
150 struct cache_entry
**cache
;
151 unsigned int cache_nr
, cache_alloc
, cache_changed
;
152 struct cache_tree
*cache_tree
;
158 extern struct index_state the_index
;
160 #ifndef NO_THE_INDEX_COMPATIBILITY_MACROS
161 #define active_cache (the_index.cache)
162 #define active_nr (the_index.cache_nr)
163 #define active_alloc (the_index.cache_alloc)
164 #define active_cache_changed (the_index.cache_changed)
165 #define active_cache_tree (the_index.cache_tree)
167 #define read_cache() read_index(&the_index)
168 #define read_cache_from(path) read_index_from(&the_index, (path))
169 #define write_cache(newfd, cache, entries) write_index(&the_index, (newfd))
170 #define discard_cache() discard_index(&the_index)
171 #define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
172 #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
173 #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
174 #define remove_file_from_cache(path) remove_file_from_index(&the_index, (path))
175 #define add_file_to_cache(path, verbose) add_file_to_index(&the_index, (path), (verbose))
176 #define refresh_cache(flags) refresh_index(&the_index, flags)
177 #define ce_match_stat(ce, st, really) ie_match_stat(&the_index, (ce), (st), (really))
178 #define ce_modified(ce, st, really) ie_modified(&the_index, (ce), (st), (really))
188 /* 5 for future expansion */
194 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
195 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
196 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
197 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
198 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
199 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
200 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
201 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
202 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
203 #define GITATTRIBUTES_FILE ".gitattributes"
204 #define INFOATTRIBUTES_FILE "info/attributes"
205 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
207 extern int is_bare_repository_cfg
;
208 extern int is_bare_repository(void);
209 extern int is_inside_git_dir(void);
210 extern const char *get_git_dir(void);
211 extern char *get_object_directory(void);
212 extern char *get_refs_directory(void);
213 extern char *get_index_file(void);
214 extern char *get_graft_file(void);
216 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
218 extern const char **get_pathspec(const char *prefix
, const char **pathspec
);
219 extern const char *setup_git_directory_gently(int *);
220 extern const char *setup_git_directory(void);
221 extern const char *prefix_path(const char *prefix
, int len
, const char *path
);
222 extern const char *prefix_filename(const char *prefix
, int len
, const char *path
);
223 extern void verify_filename(const char *prefix
, const char *name
);
224 extern void verify_non_filename(const char *prefix
, const char *name
);
226 #define alloc_nr(x) (((x)+16)*3/2)
228 /* Initialize and use the cache information */
229 extern int read_index(struct index_state
*);
230 extern int read_index_from(struct index_state
*, const char *path
);
231 extern int write_index(struct index_state
*, int newfd
);
232 extern int discard_index(struct index_state
*);
233 extern int verify_path(const char *path
);
234 extern int index_name_pos(struct index_state
*, const char *name
, int namelen
);
235 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
236 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
237 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
238 extern int add_index_entry(struct index_state
*, struct cache_entry
*ce
, int option
);
239 extern struct cache_entry
*refresh_cache_entry(struct cache_entry
*ce
, int really
);
240 extern int remove_index_entry_at(struct index_state
*, int pos
);
241 extern int remove_file_from_index(struct index_state
*, const char *path
);
242 extern int add_file_to_index(struct index_state
*, const char *path
, int verbose
);
243 extern int ce_same_name(struct cache_entry
*a
, struct cache_entry
*b
);
244 extern int ie_match_stat(struct index_state
*, struct cache_entry
*, struct stat
*, int);
245 extern int ie_modified(struct index_state
*, struct cache_entry
*, struct stat
*, int);
246 extern int ce_path_match(const struct cache_entry
*ce
, const char **pathspec
);
247 extern int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, enum object_type type
, const char *path
);
248 extern int read_pipe(int fd
, char** return_buf
, unsigned long* return_size
);
249 extern int index_pipe(unsigned char *sha1
, int fd
, const char *type
, int write_object
);
250 extern int index_path(unsigned char *sha1
, const char *path
, struct stat
*st
, int write_object
);
251 extern void fill_stat_cache_info(struct cache_entry
*ce
, struct stat
*st
);
253 #define REFRESH_REALLY 0x0001 /* ignore_valid */
254 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
255 #define REFRESH_QUIET 0x0004 /* be quiet about it */
256 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
257 extern int refresh_index(struct index_state
*, unsigned int flags
);
260 struct lock_file
*next
;
263 char filename
[PATH_MAX
];
265 extern int hold_lock_file_for_update(struct lock_file
*, const char *path
, int);
266 extern int commit_lock_file(struct lock_file
*);
268 extern int hold_locked_index(struct lock_file
*, int);
269 extern int commit_locked_index(struct lock_file
*);
270 extern void set_alternate_index_output(const char *);
272 extern void rollback_lock_file(struct lock_file
*);
273 extern int delete_ref(const char *, const unsigned char *sha1
);
275 /* Environment bits from configuration mechanism */
276 extern int trust_executable_bit
;
277 extern int has_symlinks
;
278 extern int assume_unchanged
;
279 extern int prefer_symlink_refs
;
280 extern int log_all_ref_updates
;
281 extern int warn_ambiguous_refs
;
282 extern int shared_repository
;
283 extern const char *apply_default_whitespace
;
284 extern int zlib_compression_level
;
285 extern size_t packed_git_window_size
;
286 extern size_t packed_git_limit
;
287 extern size_t delta_base_cache_limit
;
288 extern int auto_crlf
;
290 #define GIT_REPO_VERSION 0
291 extern int repository_format_version
;
292 extern int check_repository_format(void);
294 #define MTIME_CHANGED 0x0001
295 #define CTIME_CHANGED 0x0002
296 #define OWNER_CHANGED 0x0004
297 #define MODE_CHANGED 0x0008
298 #define INODE_CHANGED 0x0010
299 #define DATA_CHANGED 0x0020
300 #define TYPE_CHANGED 0x0040
302 /* Return a statically allocated filename matching the sha1 signature */
303 extern char *mkpath(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
304 extern char *git_path(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
305 extern char *sha1_file_name(const unsigned char *sha1
);
306 extern char *sha1_pack_name(const unsigned char *sha1
);
307 extern char *sha1_pack_index_name(const unsigned char *sha1
);
308 extern const char *find_unique_abbrev(const unsigned char *sha1
, int);
309 extern const unsigned char null_sha1
[20];
310 static inline int is_null_sha1(const unsigned char *sha1
)
312 return !memcmp(sha1
, null_sha1
, 20);
314 static inline int hashcmp(const unsigned char *sha1
, const unsigned char *sha2
)
316 return memcmp(sha1
, sha2
, 20);
318 static inline void hashcpy(unsigned char *sha_dst
, const unsigned char *sha_src
)
320 memcpy(sha_dst
, sha_src
, 20);
322 static inline void hashclr(unsigned char *hash
)
327 int git_mkstemp(char *path
, size_t n
, const char *template);
334 int git_config_perm(const char *var
, const char *value
);
335 int adjust_shared_perm(const char *path
);
336 int safe_create_leading_directories(char *path
);
337 char *enter_repo(char *path
, int strict
);
339 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
340 extern int sha1_object_info(const unsigned char *, unsigned long *);
341 extern void * read_sha1_file(const unsigned char *sha1
, enum object_type
*type
, unsigned long *size
);
342 extern int hash_sha1_file(const void *buf
, unsigned long len
, const char *type
, unsigned char *sha1
);
343 extern int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *return_sha1
);
344 extern int pretend_sha1_file(void *, unsigned long, enum object_type
, unsigned char *);
346 extern int check_sha1_signature(const unsigned char *sha1
, void *buf
, unsigned long size
, const char *type
);
348 extern int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
349 size_t bufsize
, size_t *bufposn
);
350 extern int write_sha1_to_fd(int fd
, const unsigned char *sha1
);
351 extern int move_temp_to_file(const char *tmpfile
, const char *filename
);
353 extern int has_sha1_pack(const unsigned char *sha1
, const char **ignore
);
354 extern int has_sha1_file(const unsigned char *sha1
);
355 extern void *map_sha1_file(const unsigned char *sha1
, unsigned long *);
357 extern int has_pack_file(const unsigned char *sha1
);
358 extern int has_pack_index(const unsigned char *sha1
);
360 extern signed char hexval_table
[256];
361 static inline unsigned int hexval(unsigned int c
)
363 return hexval_table
[c
];
366 /* Convert to/from hex/sha1 representation */
367 #define MINIMUM_ABBREV 4
368 #define DEFAULT_ABBREV 7
370 extern int get_sha1(const char *str
, unsigned char *sha1
);
371 extern int get_sha1_with_mode(const char *str
, unsigned char *sha1
, unsigned *mode
);
372 extern int get_sha1_hex(const char *hex
, unsigned char *sha1
);
373 extern char *sha1_to_hex(const unsigned char *sha1
); /* static buffer result! */
374 extern int read_ref(const char *filename
, unsigned char *sha1
);
375 extern const char *resolve_ref(const char *path
, unsigned char *sha1
, int, int *);
376 extern int dwim_ref(const char *str
, int len
, unsigned char *sha1
, char **ref
);
377 extern int dwim_log(const char *str
, int len
, unsigned char *sha1
, char **ref
);
379 extern int create_symref(const char *ref
, const char *refs_heads_master
, const char *logmsg
);
380 extern int validate_headref(const char *ref
);
382 extern int base_name_compare(const char *name1
, int len1
, int mode1
, const char *name2
, int len2
, int mode2
);
383 extern int cache_name_compare(const char *name1
, int len1
, const char *name2
, int len2
);
385 extern void *read_object_with_reference(const unsigned char *sha1
,
386 const char *required_type
,
388 unsigned char *sha1_ret
);
390 enum date_mode
{ DATE_NORMAL
= 0, DATE_RELATIVE
, DATE_SHORT
, DATE_LOCAL
};
391 const char *show_date(unsigned long time
, int timezone
, enum date_mode mode
);
392 const char *show_rfc2822_date(unsigned long time
, int timezone
);
393 int parse_date(const char *date
, char *buf
, int bufsize
);
394 void datestamp(char *buf
, int bufsize
);
395 unsigned long approxidate(const char *);
397 extern const char *git_author_info(int);
398 extern const char *git_committer_info(int);
399 extern const char *fmt_ident(const char *name
, const char *email
, const char *date_str
, int);
402 const char *base_dir
;
410 extern int checkout_entry(struct cache_entry
*ce
, const struct checkout
*state
, char *topath
);
411 extern int has_symlink_leading_path(const char *name
, char *last_symlink
);
413 extern struct alternate_object_database
{
414 struct alternate_object_database
*next
;
416 char base
[FLEX_ARRAY
]; /* more */
418 extern void prepare_alt_odb(void);
421 struct pack_window
*next
;
425 unsigned int last_used
;
426 unsigned int inuse_cnt
;
429 extern struct packed_git
{
430 struct packed_git
*next
;
431 struct pack_window
*windows
;
433 const void *index_data
;
435 uint32_t num_objects
;
440 unsigned char sha1
[20];
441 /* something like ".git/objects/pack/xxxxx.pack" */
442 char pack_name
[FLEX_ARRAY
]; /* more */
447 unsigned char sha1
[20];
448 struct packed_git
*p
;
453 unsigned char old_sha1
[20];
454 unsigned char new_sha1
[20];
456 struct ref
*peer_ref
; /* when renaming */
457 char name
[FLEX_ARRAY
]; /* more */
460 #define REF_NORMAL (1u << 0)
461 #define REF_HEADS (1u << 1)
462 #define REF_TAGS (1u << 2)
464 extern pid_t
git_connect(int fd
[2], char *url
, const char *prog
);
465 extern int finish_connect(pid_t pid
);
466 extern int path_match(const char *path
, int nr
, char **match
);
467 extern int match_refs(struct ref
*src
, struct ref
*dst
, struct ref
***dst_tail
,
468 int nr_refspec
, char **refspec
, int all
);
469 extern int get_ack(int fd
, unsigned char *result_sha1
);
470 extern struct ref
**get_remote_heads(int in
, struct ref
**list
, int nr_match
, char **match
, unsigned int flags
);
471 extern int server_supports(const char *feature
);
473 extern struct packed_git
*parse_pack_index(unsigned char *sha1
);
474 extern struct packed_git
*parse_pack_index_file(const unsigned char *sha1
,
475 const char *idx_path
);
477 extern void prepare_packed_git(void);
478 extern void reprepare_packed_git(void);
479 extern void install_packed_git(struct packed_git
*pack
);
481 extern struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
482 struct packed_git
*packs
);
484 extern void pack_report(void);
485 extern unsigned char* use_pack(struct packed_git
*, struct pack_window
**, off_t
, unsigned int *);
486 extern void unuse_pack(struct pack_window
**);
487 extern struct packed_git
*add_packed_git(const char *, int, int);
488 extern const unsigned char *nth_packed_object_sha1(const struct packed_git
*, uint32_t);
489 extern off_t
find_pack_entry_one(const unsigned char *, struct packed_git
*);
490 extern void *unpack_entry(struct packed_git
*, off_t
, enum object_type
*, unsigned long *);
491 extern unsigned long unpack_object_header_gently(const unsigned char *buf
, unsigned long len
, enum object_type
*type
, unsigned long *sizep
);
492 extern unsigned long get_size_from_delta(struct packed_git
*, struct pack_window
**, off_t
);
493 extern const char *packed_object_info_detail(struct packed_git
*, off_t
, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
495 /* Dumb servers support */
496 extern int update_server_info(int);
498 typedef int (*config_fn_t
)(const char *, const char *);
499 extern int git_default_config(const char *, const char *);
500 extern int git_config_from_file(config_fn_t fn
, const char *);
501 extern int git_config(config_fn_t fn
);
502 extern int git_config_int(const char *, const char *);
503 extern int git_config_bool(const char *, const char *);
504 extern int git_config_set(const char *, const char *);
505 extern int git_config_set_multivar(const char *, const char *, const char *, int);
506 extern int git_config_rename_section(const char *, const char *);
507 extern int check_repository_format_version(const char *var
, const char *value
);
509 #define MAX_GITNAME (1000)
510 extern char git_default_email
[MAX_GITNAME
];
511 extern char git_default_name
[MAX_GITNAME
];
513 extern const char *git_commit_encoding
;
514 extern const char *git_log_output_encoding
;
516 extern int copy_fd(int ifd
, int ofd
);
517 extern int read_in_full(int fd
, void *buf
, size_t count
);
518 extern int write_in_full(int fd
, const void *buf
, size_t count
);
519 extern void write_or_die(int fd
, const void *buf
, size_t count
);
520 extern int write_or_whine(int fd
, const void *buf
, size_t count
, const char *msg
);
521 extern int write_or_whine_pipe(int fd
, const void *buf
, size_t count
, const char *msg
);
524 extern void setup_pager(void);
525 extern int pager_in_use
;
526 extern int pager_use_color
;
529 int decode_85(char *dst
, const char *line
, int linelen
);
530 void encode_85(char *buf
, const unsigned char *data
, int bytes
);
533 extern void *alloc_blob_node(void);
534 extern void *alloc_tree_node(void);
535 extern void *alloc_commit_node(void);
536 extern void *alloc_tag_node(void);
537 extern void *alloc_object_node(void);
538 extern void alloc_report(void);
541 extern int nfasprintf(char **str
, const char *fmt
, ...);
542 extern int nfvasprintf(char **str
, const char *fmt
, va_list va
);
543 extern void trace_printf(const char *format
, ...);
544 extern void trace_argv_printf(const char **argv
, int count
, const char *format
, ...);
547 extern char *convert_to_git(const char *path
, const char *src
, unsigned long *sizep
);
548 extern char *convert_to_working_tree(const char *path
, const char *src
, unsigned long *sizep
);
549 extern void *convert_sha1_file(const char *path
, const unsigned char *sha1
, unsigned int mode
, enum object_type
*type
, unsigned long *size
);
552 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);