15 #include <sys/param.h>
16 #include <netinet/in.h>
17 #include <sys/types.h>
23 #if ZLIB_VERNUM < 0x1200
24 #define deflateBound(c,s) ((s) + (((s) + 7) >> 3) + (((s) + 63) >> 6) + 11)
28 #define DTYPE(de) ((de)->d_type)
34 #define DTYPE(de) DT_UNKNOWN
38 #define NORETURN __attribute__((__noreturn__))
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 #define DEFAULT_GIT_PORT 9418
54 * Environment variables transition.
55 * We accept older names for now but warn.
57 extern char *gitenv_bc(const char *);
58 #define gitenv(e) (getenv(e) ? : gitenv_bc(e))
61 * Basic data structures for the directory cache
64 #define CACHE_SIGNATURE 0x44495243 /* "DIRC" */
66 unsigned int hdr_signature
;
67 unsigned int hdr_version
;
68 unsigned int hdr_entries
;
72 * The "cache_time" is just the low 32 bits of the
73 * time. It doesn't matter if it overflows - we only
74 * check it for equality in the 32 bits we save.
82 * dev/ino/uid/gid/size are also just tracked to the low 32 bits
83 * Again - this is just a (very strong in practice) heuristic that
84 * the inode hasn't changed.
86 * We save the fields in big-endian order to allow using the
87 * index file over NFS transparently.
90 struct cache_time ce_ctime
;
91 struct cache_time ce_mtime
;
98 unsigned char sha1
[20];
99 unsigned short ce_flags
;
103 #define CE_NAMEMASK (0x0fff)
104 #define CE_STAGEMASK (0x3000)
105 #define CE_UPDATE (0x4000)
106 #define CE_STAGESHIFT 12
108 #define create_ce_flags(len, stage) htons((len) | ((stage) << CE_STAGESHIFT))
109 #define ce_namelen(ce) (CE_NAMEMASK & ntohs((ce)->ce_flags))
110 #define ce_size(ce) cache_entry_size(ce_namelen(ce))
111 #define ce_stage(ce) ((CE_STAGEMASK & ntohs((ce)->ce_flags)) >> CE_STAGESHIFT)
113 #define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644)
114 static inline unsigned int create_ce_mode(unsigned int mode
)
117 return htonl(S_IFLNK
);
118 return htonl(S_IFREG
| ce_permissions(mode
));
121 #define cache_entry_size(len) ((offsetof(struct cache_entry,name) + (len) + 8) & ~7)
123 extern struct cache_entry
**active_cache
;
124 extern unsigned int active_nr
, active_alloc
, active_cache_changed
;
126 #define GIT_DIR_ENVIRONMENT "GIT_DIR"
127 #define DEFAULT_GIT_DIR_ENVIRONMENT ".git"
128 #define DB_ENVIRONMENT "GIT_OBJECT_DIRECTORY"
129 #define INDEX_ENVIRONMENT "GIT_INDEX_FILE"
131 extern char *get_object_directory(void);
132 extern char *get_refs_directory(void);
133 extern char *get_index_file(void);
135 #define ALTERNATE_DB_ENVIRONMENT "GIT_ALTERNATE_OBJECT_DIRECTORIES"
137 #define alloc_nr(x) (((x)+16)*3/2)
139 /* Initialize and use the cache information */
140 extern int read_cache(void);
141 extern int write_cache(int newfd
, struct cache_entry
**cache
, int entries
);
142 extern int cache_name_pos(const char *name
, int namelen
);
143 #define ADD_CACHE_OK_TO_ADD 1 /* Ok to add */
144 #define ADD_CACHE_OK_TO_REPLACE 2 /* Ok to replace file/directory */
145 #define ADD_CACHE_SKIP_DFCHECK 4 /* Ok to skip DF conflict checks */
146 extern int add_cache_entry(struct cache_entry
*ce
, int option
);
147 extern int remove_cache_entry_at(int pos
);
148 extern int remove_file_from_cache(char *path
);
149 extern int ce_same_name(struct cache_entry
*a
, struct cache_entry
*b
);
150 extern int ce_match_stat(struct cache_entry
*ce
, struct stat
*st
);
151 extern int ce_path_match(const struct cache_entry
*ce
, const char **pathspec
);
152 extern int index_fd(unsigned char *sha1
, int fd
, struct stat
*st
, int write_object
, const char *type
);
153 extern void fill_stat_cache_info(struct cache_entry
*ce
, struct stat
*st
);
156 struct cache_file
*next
;
157 char lockfile
[PATH_MAX
];
159 extern int hold_index_file_for_update(struct cache_file
*, const char *path
);
160 extern int commit_index_file(struct cache_file
*);
161 extern void rollback_index_file(struct cache_file
*);
163 #define MTIME_CHANGED 0x0001
164 #define CTIME_CHANGED 0x0002
165 #define OWNER_CHANGED 0x0004
166 #define MODE_CHANGED 0x0008
167 #define INODE_CHANGED 0x0010
168 #define DATA_CHANGED 0x0020
169 #define TYPE_CHANGED 0x0040
171 /* Return a statically allocated filename matching the sha1 signature */
172 extern char *mkpath(const char *fmt
, ...);
173 extern char *git_path(const char *fmt
, ...);
174 extern char *sha1_file_name(const unsigned char *sha1
);
176 int safe_create_leading_directories(char *path
);
178 /* Read and unpack a sha1 file into memory, write memory to a sha1 file */
179 extern int unpack_sha1_header(z_stream
*stream
, void *map
, unsigned long mapsize
, void *buffer
, unsigned long size
);
180 extern int parse_sha1_header(char *hdr
, char *type
, unsigned long *sizep
);
181 extern int sha1_object_info(const unsigned char *, char *, unsigned long *);
182 extern void * unpack_sha1_file(void *map
, unsigned long mapsize
, char *type
, unsigned long *size
);
183 extern void * read_sha1_file(const unsigned char *sha1
, char *type
, unsigned long *size
);
184 extern int write_sha1_file(void *buf
, unsigned long len
, const char *type
, unsigned char *return_sha1
);
185 extern char *write_sha1_file_prepare(void *buf
,
192 extern int check_sha1_signature(const unsigned char *sha1
, void *buf
, unsigned long size
, const char *type
);
194 /* Read a tree into the cache */
195 extern int read_tree(void *buffer
, unsigned long size
, int stage
, const char **paths
);
197 extern int write_sha1_from_fd(const unsigned char *sha1
, int fd
);
198 extern int write_sha1_to_fd(int fd
, const unsigned char *sha1
);
200 extern int has_sha1_pack(const unsigned char *sha1
);
201 extern int has_sha1_file(const unsigned char *sha1
);
203 /* Convert to/from hex/sha1 representation */
204 extern int get_sha1(const char *str
, unsigned char *sha1
);
205 extern int get_sha1_hex(const char *hex
, unsigned char *sha1
);
206 extern char *sha1_to_hex(const unsigned char *sha1
); /* static buffer result! */
208 /* General helper functions */
209 extern void usage(const char *err
) NORETURN
;
210 extern void die(const char *err
, ...) NORETURN
;
211 extern int error(const char *err
, ...);
213 extern int base_name_compare(const char *name1
, int len1
, int mode1
, const char *name2
, int len2
, int mode2
);
214 extern int cache_name_compare(const char *name1
, int len1
, const char *name2
, int len2
);
216 extern void *read_object_with_reference(const unsigned char *sha1
,
217 const char *required_type
,
219 unsigned char *sha1_ret
);
221 const char *show_date(unsigned long time
, int timezone
);
222 void parse_date(const char *date
, char *buf
, int bufsize
);
223 void datestamp(char *buf
, int bufsize
);
225 extern int setup_ident(void);
226 extern char *get_ident(const char *name
, const char *email
, const char *date_str
);
228 static inline void *xmalloc(size_t size
)
230 void *ret
= malloc(size
);
232 die("Out of memory, malloc failed");
236 static inline void *xrealloc(void *ptr
, size_t size
)
238 void *ret
= realloc(ptr
, size
);
240 die("Out of memory, realloc failed");
244 static inline void *xcalloc(size_t nmemb
, size_t size
)
246 void *ret
= calloc(nmemb
, size
);
248 die("Out of memory, calloc failed");
253 const char *base_dir
;
261 extern int checkout_entry(struct cache_entry
*ce
, struct checkout
*state
);
263 extern struct alternate_object_database
{
267 extern void prepare_alt_odb(void);
269 extern struct packed_git
{
270 struct packed_git
*next
;
271 unsigned long index_size
;
272 unsigned long pack_size
;
273 unsigned int *index_base
;
275 unsigned int pack_last_used
;
276 unsigned int pack_use_cnt
;
277 char pack_name
[0]; /* something like ".git/objects/pack/xxxxx.pack" */
282 unsigned char sha1
[20];
283 struct packed_git
*p
;
286 extern int git_connect(int fd
[2], char *url
, const char *prog
);
287 extern int finish_connect(pid_t pid
);
288 extern int path_match(const char *path
, int nr
, char **match
);
289 extern int get_ack(int fd
, unsigned char *result_sha1
);
291 extern void prepare_packed_git(void);
292 extern int use_packed_git(struct packed_git
*);
293 extern void unuse_packed_git(struct packed_git
*);
294 extern struct packed_git
*add_packed_git(char *, int);
295 extern int num_packed_objects(const struct packed_git
*p
);
296 extern int nth_packed_object_sha1(const struct packed_git
*, int, unsigned char*);
297 extern int find_pack_entry_one(const unsigned char *, struct pack_entry
*, struct packed_git
*);
298 extern void *unpack_entry_gently(struct pack_entry
*, char *, unsigned long *);
299 extern void packed_object_info_detail(struct pack_entry
*, char *, unsigned long *, unsigned long *, int *, unsigned char *);