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 * A "directory link" is a link to another git directory.
30 * The value 0160000 is not normally a valid mode, and
31 * also just happens to be S_IFDIR + S_IFLNK
33 * NOTE! We *really* shouldn't depend on the S_IFxxx macros
34 * always having the same values everywhere. We should use
35 * our internal git values for these things, and then we can
36 * translate that to the OS-specific value. It just so
37 * happens that everybody shares the same bit representation
38 * in the UNIX world (and apparently wider too..)
40 #define S_IFDIRLNK 0160000
41 #define S_ISDIRLNK(m) (((m) & S_IFMT) == S_IFDIRLNK)
44 * Intensive research over the course of many years has shown that
45 * port 9418 is totally unused by anything else. Or
47 * Your search - "port 9418" - did not match any documents.
49 * as www.google.com puts it.
51 * This port has been properly assigned for git use by IANA:
52 * git (Assigned-9418) [I06-050728-0001].
54 * git 9418/tcp git pack transfer service
55 * git 9418/udp git pack transfer service
57 * with Linus Torvalds <torvalds@osdl.org> as the point of
58 * contact. September 2005.
60 * See http://www.iana.org/assignments/port-numbers
62 #define DEFAULT_GIT_PORT 9418
65 * Basic data structures for the directory cache
68 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
70 unsigned int hdr_signature
;
71 unsigned int hdr_version
;
72 unsigned int hdr_entries
;
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.
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.
90 * We save the fields in big-endian order to allow using the
91 * index file over NFS transparently.
94 struct cache_time ce_ctime
;
95 struct cache_time ce_mtime
;
101 unsigned int ce_size
;
102 unsigned char sha1
[20];
103 unsigned short ce_flags
;
104 char name
[FLEX_ARRAY
]; /* more */
107 #define CE_NAMEMASK (0x0fff)
108 #define CE_STAGEMASK (0x3000)
109 #define CE_UPDATE (0x4000)
110 #define CE_VALID (0x8000)
111 #define CE_STAGESHIFT 12
113 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
114 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
115 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
116 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
118 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
119 static inline unsigned int create_ce_mode(unsigned int mode
)
122 return htonl(S_IFLNK
);
123 if (S_ISDIR(mode
) || S_ISDIRLNK(mode
))
124 return htonl(S_IFDIRLNK
);
125 return htonl(S_IFREG
| ce_permissions(mode
));
127 static inline unsigned int ce_mode_from_stat(struct cache_entry
*ce
, unsigned int mode
)
129 extern int trust_executable_bit
, has_symlinks
;
130 if (!has_symlinks
&& S_ISREG(mode
) &&
131 ce
&& S_ISLNK(ntohl(ce
->ce_mode
)))
133 if (!trust_executable_bit
&& S_ISREG(mode
)) {
134 if (ce
&& S_ISREG(ntohl(ce
->ce_mode
)))
136 return create_ce_mode(0666);
138 return create_ce_mode(mode
);
140 #define canon_mode(mode) \
141 (S_ISREG(mode) ? (S_IFREG | ce_permissions(mode)) : \
142 S_ISLNK(mode) ? S_IFLNK : S_ISDIR(mode) ? S_IFDIR : S_IFDIRLNK)
144 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
147 struct cache_entry
**cache
;
148 unsigned int cache_nr
, cache_alloc
, cache_changed
;
149 struct cache_tree
*cache_tree
;
155 extern struct index_state the_index
;
157 #define active_cache (the_index.cache)
158 #define active_nr (the_index.cache_nr)
159 #define active_alloc (the_index.cache_alloc)
160 #define active_cache_changed (the_index.cache_changed)
161 #define active_cache_tree (the_index.cache_tree)
170 /* 5 for future expansion */
176 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
177 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
178 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
179 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
180 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
181 #define TEMPLATE_DIR_ENVIRONMENT "GIT_TEMPLATE_DIR"
182 #define CONFIG_ENVIRONMENT "GIT_CONFIG"
183 #define CONFIG_LOCAL_ENVIRONMENT "GIT_CONFIG_LOCAL"
184 #define EXEC_PATH_ENVIRONMENT "GIT_EXEC_PATH"
185 #define GITATTRIBUTES_FILE ".gitattributes"
186 #define INFOATTRIBUTES_FILE "info/attributes"
187 #define ATTRIBUTE_MACRO_PREFIX "[attr]"
189 extern int is_bare_repository_cfg
;
190 extern int is_bare_repository(void);
191 extern int is_inside_git_dir(void);
192 extern const char *get_git_dir(void);
193 extern char *get_object_directory(void);
194 extern char *get_refs_directory(void);
195 extern char *get_index_file(void);
196 extern char *get_graft_file(void);
198 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
200 extern const char **get_pathspec(const char *prefix
, const char **pathspec
);
201 extern const char *setup_git_directory_gently(int *);
202 extern const char *setup_git_directory(void);
203 extern const char *prefix_path(const char *prefix
, int len
, const char *path
);
204 extern const char *prefix_filename(const char *prefix
, int len
, const char *path
);
205 extern void verify_filename(const char *prefix
, const char *name
);
206 extern void verify_non_filename(const char *prefix
, const char *name
);
208 #define alloc_nr(x) (((x)+16)*3/2)
210 /* Initialize and use the cache information */
211 extern int read_cache(void);
212 extern int read_cache_from(const char *path
);
213 extern int write_cache(int newfd
, struct cache_entry
**cache
, int entries
);
214 extern int discard_cache(void);
215 extern int verify_path(const char *path
);
216 extern int cache_name_pos(const char *name
, int namelen
);
217 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
218 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
219 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
220 extern int add_cache_entry(struct cache_entry
*ce
, int option
);
221 extern struct cache_entry
*refresh_cache_entry(struct cache_entry
*ce
, int really
);
222 extern int remove_cache_entry_at(int pos
);
223 extern int remove_file_from_cache(const char *path
);
224 extern int add_file_to_cache(const char *path
, int verbose
);
225 extern int ce_same_name(struct cache_entry
*a
, struct cache_entry
*b
);
226 extern int ce_match_stat(struct cache_entry
*ce
, struct stat
*st
, int);
227 extern int ce_modified(struct cache_entry
*ce
, struct stat
*st
, int);
228 extern int ce_path_match(const struct cache_entry
*ce
, const char **pathspec
);
229 extern int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, enum object_type type
, const char *path
);
230 extern int read_pipe(int fd
, char** return_buf
, unsigned long* return_size
);
231 extern int index_pipe(unsigned char *sha1
, int fd
, const char *type
, int write_object
);
232 extern int index_path(unsigned char *sha1
, const char *path
, struct stat
*st
, int write_object
);
233 extern void fill_stat_cache_info(struct cache_entry
*ce
, struct stat
*st
);
235 #define REFRESH_REALLY 0x0001 /* ignore_valid */
236 #define REFRESH_UNMERGED 0x0002 /* allow unmerged */
237 #define REFRESH_QUIET 0x0004 /* be quiet about it */
238 #define REFRESH_IGNORE_MISSING 0x0008 /* ignore non-existent */
239 extern int refresh_cache(unsigned int flags
);
242 struct lock_file
*next
;
245 char filename
[PATH_MAX
];
247 extern int hold_lock_file_for_update(struct lock_file
*, const char *path
, int);
248 extern int commit_lock_file(struct lock_file
*);
250 extern int hold_locked_index(struct lock_file
*, int);
251 extern int commit_locked_index(struct lock_file
*);
252 extern void set_alternate_index_output(const char *);
254 extern void rollback_lock_file(struct lock_file
*);
255 extern int delete_ref(const char *, const unsigned char *sha1
);
257 /* Environment bits from configuration mechanism */
258 extern int use_legacy_headers
;
259 extern int trust_executable_bit
;
260 extern int has_symlinks
;
261 extern int assume_unchanged
;
262 extern int prefer_symlink_refs
;
263 extern int log_all_ref_updates
;
264 extern int warn_ambiguous_refs
;
265 extern int shared_repository
;
266 extern const char *apply_default_whitespace
;
267 extern int zlib_compression_level
;
268 extern size_t packed_git_window_size
;
269 extern size_t packed_git_limit
;
270 extern size_t delta_base_cache_limit
;
271 extern int auto_crlf
;
273 #define GIT_REPO_VERSION 0
274 extern int repository_format_version
;
275 extern int check_repository_format(void);
277 #define MTIME_CHANGED 0x0001
278 #define CTIME_CHANGED 0x0002
279 #define OWNER_CHANGED 0x0004
280 #define MODE_CHANGED 0x0008
281 #define INODE_CHANGED 0x0010
282 #define DATA_CHANGED 0x0020
283 #define TYPE_CHANGED 0x0040
285 /* Return a statically allocated filename matching the sha1 signature */
286 extern char *mkpath(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
287 extern char *git_path(const char *fmt
, ...) __attribute__((format (printf
, 1, 2)));
288 extern char *sha1_file_name(const unsigned char *sha1
);
289 extern char *sha1_pack_name(const unsigned char *sha1
);
290 extern char *sha1_pack_index_name(const unsigned char *sha1
);
291 extern const char *find_unique_abbrev(const unsigned char *sha1
, int);
292 extern const unsigned char null_sha1
[20];
293 static inline int is_null_sha1(const unsigned char *sha1
)
295 return !memcmp(sha1
, null_sha1
, 20);
297 static inline int hashcmp(const unsigned char *sha1
, const unsigned char *sha2
)
299 return memcmp(sha1
, sha2
, 20);
301 static inline void hashcpy(unsigned char *sha_dst
, const unsigned char *sha_src
)
303 memcpy(sha_dst
, sha_src
, 20);
305 static inline void hashclr(unsigned char *hash
)
310 int git_mkstemp(char *path
, size_t n
, const char *template);
317 int git_config_perm(const char *var
, const char *value
);
318 int adjust_shared_perm(const char *path
);
319 int safe_create_leading_directories(char *path
);
320 char *enter_repo(char *path
, int strict
);
322 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
323 extern int sha1_object_info(const unsigned char *, unsigned long *);
324 extern void * read_sha1_file(const unsigned char *sha1
, enum object_type
*type
, unsigned long *size
);
325 extern int hash_sha1_file(const void *buf
, unsigned long len
, const char *type
, unsigned char *sha1
);
326 extern int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *return_sha1
);
327 extern int pretend_sha1_file(void *, unsigned long, enum object_type
, unsigned char *);
329 extern int check_sha1_signature(const unsigned char *sha1
, void *buf
, unsigned long size
, const char *type
);
331 extern int write_sha1_from_fd(const unsigned char *sha1
, int fd
, char *buffer
,
332 size_t bufsize
, size_t *bufposn
);
333 extern int write_sha1_to_fd(int fd
, const unsigned char *sha1
);
334 extern int move_temp_to_file(const char *tmpfile
, const char *filename
);
336 extern int has_sha1_pack(const unsigned char *sha1
, const char **ignore
);
337 extern int has_sha1_file(const unsigned char *sha1
);
338 extern void *map_sha1_file(const unsigned char *sha1
, unsigned long *);
339 extern int legacy_loose_object(unsigned char *);
341 extern int has_pack_file(const unsigned char *sha1
);
342 extern int has_pack_index(const unsigned char *sha1
);
344 extern signed char hexval_table
[256];
345 static inline unsigned int hexval(unsigned int c
)
347 return hexval_table
[c
];
350 /* Convert to/from hex/sha1 representation */
351 #define MINIMUM_ABBREV 4
352 #define DEFAULT_ABBREV 7
354 extern int get_sha1(const char *str
, unsigned char *sha1
);
355 extern int get_sha1_hex(const char *hex
, unsigned char *sha1
);
356 extern char *sha1_to_hex(const unsigned char *sha1
); /* static buffer result! */
357 extern int read_ref(const char *filename
, unsigned char *sha1
);
358 extern const char *resolve_ref(const char *path
, unsigned char *sha1
, int, int *);
359 extern int dwim_ref(const char *str
, int len
, unsigned char *sha1
, char **ref
);
360 extern int dwim_log(const char *str
, int len
, unsigned char *sha1
, char **ref
);
362 extern int create_symref(const char *ref
, const char *refs_heads_master
, const char *logmsg
);
363 extern int validate_headref(const char *ref
);
365 extern int base_name_compare(const char *name1
, int len1
, int mode1
, const char *name2
, int len2
, int mode2
);
366 extern int cache_name_compare(const char *name1
, int len1
, const char *name2
, int len2
);
368 extern void *read_object_with_reference(const unsigned char *sha1
,
369 const char *required_type
,
371 unsigned char *sha1_ret
);
373 enum date_mode
{ DATE_NORMAL
= 0, DATE_RELATIVE
, DATE_SHORT
};
374 const char *show_date(unsigned long time
, int timezone
, enum date_mode mode
);
375 const char *show_rfc2822_date(unsigned long time
, int timezone
);
376 int parse_date(const char *date
, char *buf
, int bufsize
);
377 void datestamp(char *buf
, int bufsize
);
378 unsigned long approxidate(const char *);
380 extern const char *git_author_info(int);
381 extern const char *git_committer_info(int);
382 extern const char *fmt_ident(const char *name
, const char *email
, const char *date_str
, int);
385 const char *base_dir
;
393 extern int checkout_entry(struct cache_entry
*ce
, struct checkout
*state
, char *topath
);
395 extern struct alternate_object_database
{
396 struct alternate_object_database
*next
;
398 char base
[FLEX_ARRAY
]; /* more */
400 extern void prepare_alt_odb(void);
403 struct pack_window
*next
;
407 unsigned int last_used
;
408 unsigned int inuse_cnt
;
411 extern struct packed_git
{
412 struct packed_git
*next
;
413 struct pack_window
*windows
;
415 const void *index_data
;
417 uint32_t num_objects
;
422 unsigned char sha1
[20];
423 /* something like ".git/objects/pack/xxxxx.pack" */
424 char pack_name
[FLEX_ARRAY
]; /* more */
429 unsigned char sha1
[20];
430 struct packed_git
*p
;
435 unsigned char old_sha1
[20];
436 unsigned char new_sha1
[20];
438 struct ref
*peer_ref
; /* when renaming */
439 char name
[FLEX_ARRAY
]; /* more */
442 #define REF_NORMAL (1u << 0)
443 #define REF_HEADS (1u << 1)
444 #define REF_TAGS (1u << 2)
446 extern pid_t
git_connect(int fd
[2], char *url
, const char *prog
);
447 extern int finish_connect(pid_t pid
);
448 extern int path_match(const char *path
, int nr
, char **match
);
449 extern int match_refs(struct ref
*src
, struct ref
*dst
, struct ref
***dst_tail
,
450 int nr_refspec
, char **refspec
, int all
);
451 extern int get_ack(int fd
, unsigned char *result_sha1
);
452 extern struct ref
**get_remote_heads(int in
, struct ref
**list
, int nr_match
, char **match
, unsigned int flags
);
453 extern int server_supports(const char *feature
);
455 extern struct packed_git
*parse_pack_index(unsigned char *sha1
);
456 extern struct packed_git
*parse_pack_index_file(const unsigned char *sha1
,
457 const char *idx_path
);
459 extern void prepare_packed_git(void);
460 extern void reprepare_packed_git(void);
461 extern void install_packed_git(struct packed_git
*pack
);
463 extern struct packed_git
*find_sha1_pack(const unsigned char *sha1
,
464 struct packed_git
*packs
);
466 extern void pack_report(void);
467 extern unsigned char* use_pack(struct packed_git
*, struct pack_window
**, off_t
, unsigned int *);
468 extern void unuse_pack(struct pack_window
**);
469 extern struct packed_git
*add_packed_git(const char *, int, int);
470 extern const unsigned char *nth_packed_object_sha1(const struct packed_git
*, uint32_t);
471 extern off_t
find_pack_entry_one(const unsigned char *, struct packed_git
*);
472 extern void *unpack_entry(struct packed_git
*, off_t
, enum object_type
*, unsigned long *);
473 extern unsigned long unpack_object_header_gently(const unsigned char *buf
, unsigned long len
, enum object_type
*type
, unsigned long *sizep
);
474 extern unsigned long get_size_from_delta(struct packed_git
*, struct pack_window
**, off_t
);
475 extern const char *packed_object_info_detail(struct packed_git
*, off_t
, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
477 /* Dumb servers support */
478 extern int update_server_info(int);
480 typedef int (*config_fn_t
)(const char *, const char *);
481 extern int git_default_config(const char *, const char *);
482 extern int git_config_from_file(config_fn_t fn
, const char *);
483 extern int git_config(config_fn_t fn
);
484 extern int git_config_int(const char *, const char *);
485 extern int git_config_bool(const char *, const char *);
486 extern int git_config_set(const char *, const char *);
487 extern int git_config_set_multivar(const char *, const char *, const char *, int);
488 extern int git_config_rename_section(const char *, const char *);
489 extern int check_repository_format_version(const char *var
, const char *value
);
491 #define MAX_GITNAME (1000)
492 extern char git_default_email
[MAX_GITNAME
];
493 extern char git_default_name
[MAX_GITNAME
];
495 extern const char *git_commit_encoding
;
496 extern const char *git_log_output_encoding
;
498 extern int copy_fd(int ifd
, int ofd
);
499 extern int read_in_full(int fd
, void *buf
, size_t count
);
500 extern int write_in_full(int fd
, const void *buf
, size_t count
);
501 extern void write_or_die(int fd
, const void *buf
, size_t count
);
502 extern int write_or_whine(int fd
, const void *buf
, size_t count
, const char *msg
);
503 extern int write_or_whine_pipe(int fd
, const void *buf
, size_t count
, const char *msg
);
506 extern void setup_pager(void);
507 extern int pager_in_use
;
508 extern int pager_use_color
;
511 int decode_85(char *dst
, const char *line
, int linelen
);
512 void encode_85(char *buf
, const unsigned char *data
, int bytes
);
515 extern void *alloc_blob_node(void);
516 extern void *alloc_tree_node(void);
517 extern void *alloc_commit_node(void);
518 extern void *alloc_tag_node(void);
519 extern void *alloc_object_node(void);
520 extern void alloc_report(void);
523 extern int nfasprintf(char **str
, const char *fmt
, ...);
524 extern int nfvasprintf(char **str
, const char *fmt
, va_list va
);
525 extern void trace_printf(const char *format
, ...);
526 extern void trace_argv_printf(const char **argv
, int count
, const char *format
, ...);
529 extern char *convert_to_git(const char *path
, const char *src
, unsigned long *sizep
);
530 extern char *convert_to_working_tree(const char *path
, const char *src
, unsigned long *sizep
);
533 void shift_tree(const unsigned char *, const unsigned char *, unsigned char *, int);