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);
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);
251 extern int has_pack_file(const unsigned char *sha1);
252 extern int has_pack_index(const unsigned char *sha1);
254 /* Convert to/from hex/sha1 representation */
255 #define MINIMUM_ABBREV 4
256 #define DEFAULT_ABBREV 7
258 extern int get_sha1(const char *str, unsigned char *sha1);
259 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
260 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
261 extern int read_ref(const char *filename, unsigned char *sha1);
262 extern const char *resolve_ref(const char *path, unsigned char *sha1, int);
263 extern int create_symref(const char *git_HEAD, const char *refs_heads_master);
264 extern int validate_symref(const char *git_HEAD);
266 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
267 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
269 extern void *read_object_with_reference(const unsigned char *sha1,
270 const char *required_type,
272 unsigned char *sha1_ret);
274 const char *show_date(unsigned long time, int timezone);
275 const char *show_rfc2822_date(unsigned long time, int timezone);
276 int parse_date(const char *date, char *buf, int bufsize);
277 void datestamp(char *buf, int bufsize);
278 unsigned long approxidate(const char *);
280 extern int setup_ident(void);
281 extern const char *git_author_info(int);
282 extern const char *git_committer_info(int);
285 const char *base_dir;
293 extern int checkout_entry(struct cache_entry *ce, struct checkout *state, char *topath);
295 extern struct alternate_object_database {
296 struct alternate_object_database *next;
298 char base[FLEX_ARRAY]; /* more */
300 extern void prepare_alt_odb(void);
302 extern struct packed_git {
303 struct packed_git *next;
304 unsigned long index_size;
305 unsigned long pack_size;
306 unsigned int *index_base;
308 unsigned int pack_last_used;
309 unsigned int pack_use_cnt;
311 unsigned char sha1[20];
312 /* something like ".git/objects/pack/xxxxx.pack" */
313 char pack_name[FLEX_ARRAY]; /* more */
318 unsigned char sha1[20];
319 struct packed_git *p;
324 unsigned char old_sha1[20];
325 unsigned char new_sha1[20];
327 struct ref *peer_ref; /* when renaming */
328 char name[FLEX_ARRAY]; /* more */
331 #define REF_NORMAL (1u << 0)
332 #define REF_HEADS (1u << 1)
333 #define REF_TAGS (1u << 2)
335 extern int git_connect(int fd[2], char *url, const char *prog);
336 extern int finish_connect(pid_t pid);
337 extern int path_match(const char *path, int nr, char **match);
338 extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
339 int nr_refspec, char **refspec, int all);
340 extern int get_ack(int fd, unsigned char *result_sha1);
341 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, unsigned int flags);
342 extern int server_supports(const char *feature);
344 extern struct packed_git *parse_pack_index(unsigned char *sha1);
345 extern struct packed_git *parse_pack_index_file(const unsigned char *sha1,
348 extern void prepare_packed_git(void);
349 extern void install_packed_git(struct packed_git *pack);
351 extern struct packed_git *find_sha1_pack(const unsigned char *sha1,
352 struct packed_git *packs);
354 extern int use_packed_git(struct packed_git *);
355 extern void unuse_packed_git(struct packed_git *);
356 extern struct packed_git *add_packed_git(char *, int, int);
357 extern int num_packed_objects(const struct packed_git *p);
358 extern int nth_packed_object_sha1(const struct packed_git *, int, unsigned char*);
359 extern int find_pack_entry_one(const unsigned char *, struct pack_entry *, struct packed_git *);
360 extern void *unpack_entry_gently(struct pack_entry *, char *, unsigned long *);
361 extern void packed_object_info_detail(struct pack_entry *, char *, unsigned long *, unsigned long *, unsigned int *, unsigned char *);
363 /* Dumb servers support */
364 extern int update_server_info(int);
366 typedef int (*config_fn_t)(const char *, const char *);
367 extern int git_default_config(const char *, const char *);
368 extern int git_config_from_file(config_fn_t fn, const char *);
369 extern int git_config(config_fn_t fn);
370 extern int git_config_int(const char *, const char *);
371 extern int git_config_bool(const char *, const char *);
372 extern int git_config_set(const char *, const char *);
373 extern int git_config_set_multivar(const char *, const char *, const char *, int);
374 extern int check_repository_format_version(const char *var, const char *value);
376 #define MAX_GITNAME (1000)
377 extern char git_default_email[MAX_GITNAME];
378 extern char git_default_name[MAX_GITNAME];
380 #define MAX_ENCODING_LENGTH 64
381 extern char git_commit_encoding[MAX_ENCODING_LENGTH];
383 extern int copy_fd(int ifd, int ofd);
385 /* Finish off pack transfer receiving end */
386 extern int receive_unpack_pack(int fd[2], const char *me, int quiet, int);
387 extern int receive_keep_pack(int fd[2], const char *me, int quiet, int);
390 extern void setup_pager(void);
391 extern int pager_in_use;
392 extern int pager_use_color;
395 int decode_85(char *dst, char *line, int linelen);
396 void encode_85(char *buf, unsigned char *data, int bytes);
403 extern struct blob *alloc_blob_node(void);
404 extern struct tree *alloc_tree_node(void);
405 extern struct commit *alloc_commit_node(void);
406 extern struct tag *alloc_tag_node(void);
407 extern void alloc_report(void);