17 #include <sys/param.h>
18 #include <netinet/in.h>
19 #include <sys/types.h>
25 #if ZLIB_VERNUM < 0x1200
26 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
30 #define DTYPE(de) ((de)->d_type)
36 #define DTYPE(de) DT_UNKNOWN
40 #define NORETURN __attribute__((__noreturn__))
44 #define __attribute__(x)
49 * Intensive research over the course of many years has shown that
50 * port 9418 is totally unused by anything else. Or
52 * Your search - "port 9418" - did not match any documents.
54 * as www.google.com puts it.
56 * This port has been properly assigned for git use by IANA:
57 * git (Assigned-9418) [I06-050728-0001].
59 * git 9418/tcp git pack transfer service
60 * git 9418/udp git pack transfer service
62 * with Linus Torvalds <torvalds@osdl.org> as the point of
63 * contact. September 2005.
65 * See http://www.iana.org/assignments/port-numbers
67 #define DEFAULT_GIT_PORT 9418
70 * Basic data structures for the directory cache
73 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
75 unsigned int hdr_signature;
76 unsigned int hdr_version;
77 unsigned int hdr_entries;
81 * The "cache_time" is just the low 32 bits of the
82 * time. It doesn't matter if it overflows - we only
83 * check it for equality in the 32 bits we save.
91 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
92 * Again - this is just a (very strong in practice) heuristic that
93 * the inode hasn't changed.
95 * We save the fields in big-endian order to allow using the
96 * index file over NFS transparently.
99 struct cache_time ce_ctime;
100 struct cache_time ce_mtime;
103 unsigned int ce_mode;
106 unsigned int ce_size;
107 unsigned char sha1[20];
108 unsigned short ce_flags;
112 #define CE_NAMEMASK (0x0fff)
113 #define CE_STAGEMASK (0x3000)
114 #define CE_UPDATE (0x4000)
115 #define CE_STAGESHIFT 12
117 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
118 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
119 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
120 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
122 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
123 static inline unsigned int create_ce_mode(unsigned int mode)
126 return htonl(S_IFLNK);
127 return htonl(S_IFREG | ce_permissions(mode));
130 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
132 extern struct cache_entry **active_cache;
133 extern unsigned int active_nr, active_alloc, active_cache_changed;
135 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
136 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
137 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
138 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
139 #define GRAFT_ENVIRONMENT "GIT_GRAFT_FILE"
141 extern char *get_git_dir(void);
142 extern char *get_object_directory(void);
143 extern char *get_refs_directory(void);
144 extern char *get_index_file(void);
145 extern char *get_graft_file(void);
147 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
149 extern const char **get_pathspec(const char *prefix, const char **pathspec);
150 extern const char *setup_git_directory(void);
151 extern const char *prefix_path(const char *prefix, int len, const char *path);
153 #define alloc_nr(x) (((x)+16)*3/2)
155 /* Initialize and use the cache information */
156 extern int read_cache(void);
157 extern int write_cache(int newfd, struct cache_entry **cache, int entries);
158 extern int cache_name_pos(const char *name, int namelen);
159 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
160 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
161 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
162 extern int add_cache_entry(struct cache_entry *ce, int option);
163 extern int remove_cache_entry_at(int pos);
164 extern int remove_file_from_cache(const char *path);
165 extern int ce_same_name(struct cache_entry *a, struct cache_entry *b);
166 extern int ce_match_stat(struct cache_entry *ce, struct stat *st);
167 extern int ce_modified(struct cache_entry *ce, struct stat *st);
168 extern int ce_path_match(const struct cache_entry *ce, const char **pathspec);
169 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, int write_object, const char *type);
170 extern int index_path(unsigned char *sha1, const char *path, struct stat *st, int write_object);
171 extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st);
174 struct cache_file *next;
175 char lockfile[PATH_MAX];
177 extern int hold_index_file_for_update(struct cache_file *, const char *path);
178 extern int commit_index_file(struct cache_file *);
179 extern void rollback_index_file(struct cache_file *);
181 extern int trust_executable_bit;
183 #define MTIME_CHANGED 0x0001
184 #define CTIME_CHANGED 0x0002
185 #define OWNER_CHANGED 0x0004
186 #define MODE_CHANGED 0x0008
187 #define INODE_CHANGED 0x0010
188 #define DATA_CHANGED 0x0020
189 #define TYPE_CHANGED 0x0040
191 /* Return a statically allocated filename matching the sha1 signature */
192 extern char *mkpath(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
193 extern char *git_path(const char *fmt, ...) __attribute__((format (printf, 1, 2)));
194 extern char *sha1_file_name(const unsigned char *sha1);
195 extern char *sha1_pack_name(const unsigned char *sha1);
196 extern char *sha1_pack_index_name(const unsigned char *sha1);
197 extern const char *find_unique_abbrev(const unsigned char *sha1, int);
198 extern const unsigned char null_sha1[20];
200 int git_mkstemp(char *path, size_t n, const char *template);
202 int safe_create_leading_directories(char *path);
203 char *safe_strncpy(char *, const char *, size_t);
205 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
206 extern int unpack_sha1_header(z_stream *stream, void *map, unsigned long mapsize, void *buffer, unsigned long size);
207 extern int parse_sha1_header(char *hdr, char *type, unsigned long *sizep);
208 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
209 extern void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size);
210 extern void * read_sha1_file(const unsigned char *sha1, char *type, unsigned long *size);
211 extern int write_sha1_file(void *buf, unsigned long len, const char *type, unsigned char *return_sha1);
212 extern char *write_sha1_file_prepare(void *buf,
219 extern int check_sha1_signature(const unsigned char *sha1, void *buf, unsigned long size, const char *type);
221 /* Read a tree into the cache */
222 extern int read_tree(void *buffer, unsigned long size, int stage, const char **paths);
224 extern int write_sha1_from_fd(const unsigned char *sha1, int fd, char *buffer,
225 size_t bufsize, size_t *bufposn);
226 extern int write_sha1_to_fd(int fd, const unsigned char *sha1);
227 extern int move_temp_to_file(const char *tmpfile, char *filename);
229 extern int has_sha1_pack(const unsigned char *sha1);
230 extern int has_sha1_file(const unsigned char *sha1);
232 extern int has_pack_file(const unsigned char *sha1);
233 extern int has_pack_index(const unsigned char *sha1);
235 /* Convert to/from hex/sha1 representation */
236 extern int get_sha1(const char *str, unsigned char *sha1);
237 extern int get_sha1_hex(const char *hex, unsigned char *sha1);
238 extern char *sha1_to_hex(const unsigned char *sha1); /* static buffer result! */
239 extern int read_ref(const char *filename, unsigned char *sha1);
240 extern const char *resolve_ref(const char *path, unsigned char *sha1, int);
241 extern int create_symref(const char *git_HEAD, const char *refs_heads_master);
242 extern int validate_symref(const char *git_HEAD);
244 /* General helper functions */
245 extern void usage(const char *err) NORETURN;
246 extern void die(const char *err, ...) NORETURN __attribute__((format (printf, 1, 2)));
247 extern int error(const char *err, ...) __attribute__((format (printf, 1, 2)));
249 extern int base_name_compare(const char *name1, int len1, int mode1, const char *name2, int len2, int mode2);
250 extern int cache_name_compare(const char *name1, int len1, const char *name2, int len2);
252 extern void *read_object_with_reference(const unsigned char *sha1,
253 const char *required_type,
255 unsigned char *sha1_ret);
257 const char *show_date(unsigned long time, int timezone);
258 int parse_date(const char *date, char *buf, int bufsize);
259 void datestamp(char *buf, int bufsize);
261 extern int setup_ident(void);
262 extern char *get_ident(const char *name, const char *email, const char *date_str);
263 extern char *git_author_info(void);
264 extern char *git_committer_info(void);
266 static inline void *xmalloc(size_t size)
268 void *ret = malloc(size);
270 die("Out of memory, malloc failed");
274 static inline void *xrealloc(void *ptr, size_t size)
276 void *ret = realloc(ptr, size);
278 die("Out of memory, realloc failed");
282 static inline void *xcalloc(size_t nmemb, size_t size)
284 void *ret = calloc(nmemb, size);
286 die("Out of memory, calloc failed");
291 const char *base_dir;
299 extern int checkout_entry(struct cache_entry *ce, struct checkout *state);
301 extern struct alternate_object_database {
302 struct alternate_object_database *next;
304 char base[0]; /* more */
306 extern void prepare_alt_odb(void);
308 extern struct packed_git {
309 struct packed_git *next;
310 unsigned long index_size;
311 unsigned long pack_size;
312 unsigned int *index_base;
314 unsigned int pack_last_used;
315 unsigned int pack_use_cnt;
317 unsigned char sha1[20];
318 char pack_name[0]; /* something like ".git/objects/pack/xxxxx.pack" */
323 unsigned char sha1[20];
324 struct packed_git *p;
329 unsigned char old_sha1[20];
330 unsigned char new_sha1[20];
332 struct ref *peer_ref; /* when renaming */
336 extern int git_connect(int fd[2], char *url, const char *prog);
337 extern int finish_connect(pid_t pid);
338 extern int path_match(const char *path, int nr, char **match);
339 extern int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
340 int nr_refspec, char **refspec, int all);
341 extern int get_ack(int fd, unsigned char *result_sha1);
342 extern struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match, int ignore_funny);
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 *, int *, unsigned char *);
363 /* Dumb servers support */
364 extern int update_server_info(int);
371 #define MAP_PRIVATE 1
372 #define MAP_FAILED ((void*)-1)
375 extern void *gitfakemmap(void *start, size_t length, int prot , int flags, int fd, off_t offset);
376 extern int gitfakemunmap(void *start, size_t length);
380 typedef int (*config_fn_t)(const char *, const char *);
381 extern int git_default_config(const char *, const char *);
382 extern int git_config(config_fn_t fn);
383 extern int git_config_int(const char *, const char *);
384 extern int git_config_bool(const char *, const char *);
386 #define MAX_GITNAME (1000)
387 extern char git_default_email[MAX_GITNAME];
388 extern char git_default_name[MAX_GITNAME];
390 /* Sane ctype - no locale, and works with signed chars */
397 extern unsigned char sane_ctype[256];
398 #define GIT_SPACE 0x01
399 #define GIT_DIGIT 0x02
400 #define GIT_ALPHA 0x04
401 #define sane_istest(x,mask) ((sane_ctype[(unsigned char)(x)] & (mask)) != 0)
402 #define isspace(x) sane_istest(x,GIT_SPACE)
403 #define isdigit(x) sane_istest(x,GIT_DIGIT)
404 #define isalpha(x) sane_istest(x,GIT_ALPHA)
405 #define isalnum(x) sane_istest(x,GIT_ALPHA | GIT_DIGIT)
406 #define tolower(x) sane_case((unsigned char)(x), 0x20)
407 #define toupper(x) sane_case((unsigned char)(x), 0)
409 static inline int sane_case(int x, int high)
411 if (sane_istest(x, GIT_ALPHA))
412 x = (x & ~0x20) | high;