1#ifndef CACHE_H 2#define CACHE_H 3 4#include"git-compat-util.h" 5#include"strbuf.h" 6#include"hashmap.h" 7#include"list.h" 8#include"advice.h" 9#include"gettext.h" 10#include"convert.h" 11#include"trace.h" 12#include"string-list.h" 13#include"pack-revindex.h" 14#include"hash.h" 15#include"path.h" 16#include"sha1-array.h" 17#include"repository.h" 18 19#include <zlib.h> 20typedefstruct git_zstream { 21 z_stream z; 22unsigned long avail_in; 23unsigned long avail_out; 24unsigned long total_in; 25unsigned long total_out; 26unsigned char*next_in; 27unsigned char*next_out; 28} git_zstream; 29 30voidgit_inflate_init(git_zstream *); 31voidgit_inflate_init_gzip_only(git_zstream *); 32voidgit_inflate_end(git_zstream *); 33intgit_inflate(git_zstream *,int flush); 34 35voidgit_deflate_init(git_zstream *,int level); 36voidgit_deflate_init_gzip(git_zstream *,int level); 37voidgit_deflate_init_raw(git_zstream *,int level); 38voidgit_deflate_end(git_zstream *); 39intgit_deflate_abort(git_zstream *); 40intgit_deflate_end_gently(git_zstream *); 41intgit_deflate(git_zstream *,int flush); 42unsigned longgit_deflate_bound(git_zstream *,unsigned long); 43 44/* The length in bytes and in hex digits of an object name (SHA-1 value). */ 45#define GIT_SHA1_RAWSZ 20 46#define GIT_SHA1_HEXSZ (2 * GIT_SHA1_RAWSZ) 47 48/* The length in byte and in hex digits of the largest possible hash value. */ 49#define GIT_MAX_RAWSZ GIT_SHA1_RAWSZ 50#define GIT_MAX_HEXSZ GIT_SHA1_HEXSZ 51 52struct object_id { 53unsigned char hash[GIT_MAX_RAWSZ]; 54}; 55 56#define the_hash_algo the_repository->hash_algo 57 58#if defined(DT_UNKNOWN) && !defined(NO_D_TYPE_IN_DIRENT) 59#define DTYPE(de) ((de)->d_type) 60#else 61#undef DT_UNKNOWN 62#undef DT_DIR 63#undef DT_REG 64#undef DT_LNK 65#define DT_UNKNOWN 0 66#define DT_DIR 1 67#define DT_REG 2 68#define DT_LNK 3 69#define DTYPE(de) DT_UNKNOWN 70#endif 71 72/* unknown mode (impossible combination S_IFIFO|S_IFCHR) */ 73#define S_IFINVALID 0030000 74 75/* 76 * A "directory link" is a link to another git directory. 77 * 78 * The value 0160000 is not normally a valid mode, and 79 * also just happens to be S_IFDIR + S_IFLNK 80 */ 81#define S_IFGITLINK 0160000 82#define S_ISGITLINK(m) (((m) & S_IFMT) == S_IFGITLINK) 83 84/* 85 * Some mode bits are also used internally for computations. 86 * 87 * They *must* not overlap with any valid modes, and they *must* not be emitted 88 * to outside world - i.e. appear on disk or network. In other words, it's just 89 * temporary fields, which we internally use, but they have to stay in-house. 90 * 91 * ( such approach is valid, as standard S_IF* fits into 16 bits, and in Git 92 * codebase mode is `unsigned int` which is assumed to be at least 32 bits ) 93 */ 94 95/* used internally in tree-diff */ 96#define S_DIFFTREE_IFXMIN_NEQ 0x80000000 97 98 99/* 100 * Intensive research over the course of many years has shown that 101 * port 9418 is totally unused by anything else. Or 102 * 103 * Your search - "port 9418" - did not match any documents. 104 * 105 * as www.google.com puts it. 106 * 107 * This port has been properly assigned for git use by IANA: 108 * git (Assigned-9418) [I06-050728-0001]. 109 * 110 * git 9418/tcp git pack transfer service 111 * git 9418/udp git pack transfer service 112 * 113 * with Linus Torvalds <torvalds@osdl.org> as the point of 114 * contact. September 2005. 115 * 116 * See http://www.iana.org/assignments/port-numbers 117 */ 118#define DEFAULT_GIT_PORT 9418 119 120/* 121 * Basic data structures for the directory cache 122 */ 123 124#define CACHE_SIGNATURE 0x44495243/* "DIRC" */ 125struct cache_header { 126uint32_t hdr_signature; 127uint32_t hdr_version; 128uint32_t hdr_entries; 129}; 130 131#define INDEX_FORMAT_LB 2 132#define INDEX_FORMAT_UB 4 133 134/* 135 * The "cache_time" is just the low 32 bits of the 136 * time. It doesn't matter if it overflows - we only 137 * check it for equality in the 32 bits we save. 138 */ 139struct cache_time { 140uint32_t sec; 141uint32_t nsec; 142}; 143 144struct stat_data { 145struct cache_time sd_ctime; 146struct cache_time sd_mtime; 147unsigned int sd_dev; 148unsigned int sd_ino; 149unsigned int sd_uid; 150unsigned int sd_gid; 151unsigned int sd_size; 152}; 153 154struct cache_entry { 155struct hashmap_entry ent; 156struct stat_data ce_stat_data; 157unsigned int ce_mode; 158unsigned int ce_flags; 159unsigned int ce_namelen; 160unsigned int index;/* for link extension */ 161struct object_id oid; 162char name[FLEX_ARRAY];/* more */ 163}; 164 165#define CE_STAGEMASK (0x3000) 166#define CE_EXTENDED (0x4000) 167#define CE_VALID (0x8000) 168#define CE_STAGESHIFT 12 169 170/* 171 * Range 0xFFFF0FFF in ce_flags is divided into 172 * two parts: in-memory flags and on-disk ones. 173 * Flags in CE_EXTENDED_FLAGS will get saved on-disk 174 * if you want to save a new flag, add it in 175 * CE_EXTENDED_FLAGS 176 * 177 * In-memory only flags 178 */ 179#define CE_UPDATE (1 << 16) 180#define CE_REMOVE (1 << 17) 181#define CE_UPTODATE (1 << 18) 182#define CE_ADDED (1 << 19) 183 184#define CE_HASHED (1 << 20) 185#define CE_FSMONITOR_VALID (1 << 21) 186#define CE_WT_REMOVE (1 << 22)/* remove in work directory */ 187#define CE_CONFLICTED (1 << 23) 188 189#define CE_UNPACKED (1 << 24) 190#define CE_NEW_SKIP_WORKTREE (1 << 25) 191 192/* used to temporarily mark paths matched by pathspecs */ 193#define CE_MATCHED (1 << 26) 194 195#define CE_UPDATE_IN_BASE (1 << 27) 196#define CE_STRIP_NAME (1 << 28) 197 198/* 199 * Extended on-disk flags 200 */ 201#define CE_INTENT_TO_ADD (1 << 29) 202#define CE_SKIP_WORKTREE (1 << 30) 203/* CE_EXTENDED2 is for future extension */ 204#define CE_EXTENDED2 (1U << 31) 205 206#define CE_EXTENDED_FLAGS (CE_INTENT_TO_ADD | CE_SKIP_WORKTREE) 207 208/* 209 * Safeguard to avoid saving wrong flags: 210 * - CE_EXTENDED2 won't get saved until its semantic is known 211 * - Bits in 0x0000FFFF have been saved in ce_flags already 212 * - Bits in 0x003F0000 are currently in-memory flags 213 */ 214#if CE_EXTENDED_FLAGS & 0x803FFFFF 215#error"CE_EXTENDED_FLAGS out of range" 216#endif 217 218/* Forward structure decls */ 219struct pathspec; 220struct child_process; 221 222/* 223 * Copy the sha1 and stat state of a cache entry from one to 224 * another. But we never change the name, or the hash state! 225 */ 226staticinlinevoidcopy_cache_entry(struct cache_entry *dst, 227const struct cache_entry *src) 228{ 229unsigned int state = dst->ce_flags & CE_HASHED; 230 231/* Don't copy hash chain and name */ 232memcpy(&dst->ce_stat_data, &src->ce_stat_data, 233offsetof(struct cache_entry, name) - 234offsetof(struct cache_entry, ce_stat_data)); 235 236/* Restore the hash state */ 237 dst->ce_flags = (dst->ce_flags & ~CE_HASHED) | state; 238} 239 240staticinlineunsignedcreate_ce_flags(unsigned stage) 241{ 242return(stage << CE_STAGESHIFT); 243} 244 245#define ce_namelen(ce) ((ce)->ce_namelen) 246#define ce_size(ce) cache_entry_size(ce_namelen(ce)) 247#define ce_stage(ce) ((CE_STAGEMASK & (ce)->ce_flags) >> CE_STAGESHIFT) 248#define ce_uptodate(ce) ((ce)->ce_flags & CE_UPTODATE) 249#define ce_skip_worktree(ce) ((ce)->ce_flags & CE_SKIP_WORKTREE) 250#define ce_mark_uptodate(ce) ((ce)->ce_flags |= CE_UPTODATE) 251#define ce_intent_to_add(ce) ((ce)->ce_flags & CE_INTENT_TO_ADD) 252 253#define ce_permissions(mode) (((mode) & 0100) ? 0755 : 0644) 254staticinlineunsigned intcreate_ce_mode(unsigned int mode) 255{ 256if(S_ISLNK(mode)) 257return S_IFLNK; 258if(S_ISDIR(mode) ||S_ISGITLINK(mode)) 259return S_IFGITLINK; 260return S_IFREG |ce_permissions(mode); 261} 262staticinlineunsigned intce_mode_from_stat(const struct cache_entry *ce, 263unsigned int mode) 264{ 265externint trust_executable_bit, has_symlinks; 266if(!has_symlinks &&S_ISREG(mode) && 267 ce &&S_ISLNK(ce->ce_mode)) 268return ce->ce_mode; 269if(!trust_executable_bit &&S_ISREG(mode)) { 270if(ce &&S_ISREG(ce->ce_mode)) 271return ce->ce_mode; 272returncreate_ce_mode(0666); 273} 274returncreate_ce_mode(mode); 275} 276staticinlineintce_to_dtype(const struct cache_entry *ce) 277{ 278unsigned ce_mode =ntohl(ce->ce_mode); 279if(S_ISREG(ce_mode)) 280return DT_REG; 281else if(S_ISDIR(ce_mode) ||S_ISGITLINK(ce_mode)) 282return DT_DIR; 283else if(S_ISLNK(ce_mode)) 284return DT_LNK; 285else 286return DT_UNKNOWN; 287} 288staticinlineunsigned intcanon_mode(unsigned int mode) 289{ 290if(S_ISREG(mode)) 291return S_IFREG |ce_permissions(mode); 292if(S_ISLNK(mode)) 293return S_IFLNK; 294if(S_ISDIR(mode)) 295return S_IFDIR; 296return S_IFGITLINK; 297} 298 299#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1) 300 301#define SOMETHING_CHANGED (1 << 0)/* unclassified changes go here */ 302#define CE_ENTRY_CHANGED (1 << 1) 303#define CE_ENTRY_REMOVED (1 << 2) 304#define CE_ENTRY_ADDED (1 << 3) 305#define RESOLVE_UNDO_CHANGED (1 << 4) 306#define CACHE_TREE_CHANGED (1 << 5) 307#define SPLIT_INDEX_ORDERED (1 << 6) 308#define UNTRACKED_CHANGED (1 << 7) 309#define FSMONITOR_CHANGED (1 << 8) 310 311struct split_index; 312struct untracked_cache; 313 314struct index_state { 315struct cache_entry **cache; 316unsigned int version; 317unsigned int cache_nr, cache_alloc, cache_changed; 318struct string_list *resolve_undo; 319struct cache_tree *cache_tree; 320struct split_index *split_index; 321struct cache_time timestamp; 322unsigned name_hash_initialized :1, 323 initialized :1, 324 drop_cache_tree :1; 325struct hashmap name_hash; 326struct hashmap dir_hash; 327struct object_id oid; 328struct untracked_cache *untracked; 329uint64_t fsmonitor_last_update; 330struct ewah_bitmap *fsmonitor_dirty; 331}; 332 333externstruct index_state the_index; 334 335/* Name hashing */ 336externinttest_lazy_init_name_hash(struct index_state *istate,int try_threaded); 337externvoidadd_name_hash(struct index_state *istate,struct cache_entry *ce); 338externvoidremove_name_hash(struct index_state *istate,struct cache_entry *ce); 339externvoidfree_name_hash(struct index_state *istate); 340 341 342#ifndef NO_THE_INDEX_COMPATIBILITY_MACROS 343#define active_cache (the_index.cache) 344#define active_nr (the_index.cache_nr) 345#define active_alloc (the_index.cache_alloc) 346#define active_cache_changed (the_index.cache_changed) 347#define active_cache_tree (the_index.cache_tree) 348 349#define read_cache() read_index(&the_index) 350#define read_cache_from(path) read_index_from(&the_index, (path), (get_git_dir())) 351#define read_cache_preload(pathspec) read_index_preload(&the_index, (pathspec)) 352#define is_cache_unborn() is_index_unborn(&the_index) 353#define read_cache_unmerged() read_index_unmerged(&the_index) 354#define discard_cache() discard_index(&the_index) 355#define unmerged_cache() unmerged_index(&the_index) 356#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen)) 357#define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option)) 358#define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name)) 359#define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos)) 360#define remove_file_from_cache(path) remove_file_from_index(&the_index, (path)) 361#define add_to_cache(path, st, flags) add_to_index(&the_index, (path), (st), (flags)) 362#define add_file_to_cache(path, flags) add_file_to_index(&the_index, (path), (flags)) 363#define chmod_cache_entry(ce, flip) chmod_index_entry(&the_index, (ce), (flip)) 364#define refresh_cache(flags) refresh_index(&the_index, (flags), NULL, NULL, NULL) 365#define ce_match_stat(ce, st, options) ie_match_stat(&the_index, (ce), (st), (options)) 366#define ce_modified(ce, st, options) ie_modified(&the_index, (ce), (st), (options)) 367#define cache_dir_exists(name, namelen) index_dir_exists(&the_index, (name), (namelen)) 368#define cache_file_exists(name, namelen, igncase) index_file_exists(&the_index, (name), (namelen), (igncase)) 369#define cache_name_is_other(name, namelen) index_name_is_other(&the_index, (name), (namelen)) 370#define resolve_undo_clear() resolve_undo_clear_index(&the_index) 371#define unmerge_cache_entry_at(at) unmerge_index_entry_at(&the_index, at) 372#define unmerge_cache(pathspec) unmerge_index(&the_index, pathspec) 373#define read_blob_data_from_cache(path, sz) read_blob_data_from_index(&the_index, (path), (sz)) 374#endif 375 376#define TYPE_BITS 3 377 378/* 379 * Values in this enum (except those outside the 3 bit range) are part 380 * of pack file format. See Documentation/technical/pack-format.txt 381 * for more information. 382 */ 383enum object_type { 384 OBJ_BAD = -1, 385 OBJ_NONE =0, 386 OBJ_COMMIT =1, 387 OBJ_TREE =2, 388 OBJ_BLOB =3, 389 OBJ_TAG =4, 390/* 5 for future expansion */ 391 OBJ_OFS_DELTA =6, 392 OBJ_REF_DELTA =7, 393 OBJ_ANY, 394 OBJ_MAX 395}; 396 397staticinlineenum object_type object_type(unsigned int mode) 398{ 399returnS_ISDIR(mode) ? OBJ_TREE : 400S_ISGITLINK(mode) ? OBJ_COMMIT : 401 OBJ_BLOB; 402} 403 404/* Double-check local_repo_env below if you add to this list. */ 405#define GIT_DIR_ENVIRONMENT"GIT_DIR" 406#define GIT_COMMON_DIR_ENVIRONMENT"GIT_COMMON_DIR" 407#define GIT_NAMESPACE_ENVIRONMENT"GIT_NAMESPACE" 408#define GIT_WORK_TREE_ENVIRONMENT"GIT_WORK_TREE" 409#define GIT_PREFIX_ENVIRONMENT"GIT_PREFIX" 410#define GIT_SUPER_PREFIX_ENVIRONMENT"GIT_INTERNAL_SUPER_PREFIX" 411#define DEFAULT_GIT_DIR_ENVIRONMENT".git" 412#define DB_ENVIRONMENT"GIT_OBJECT_DIRECTORY" 413#define INDEX_ENVIRONMENT"GIT_INDEX_FILE" 414#define GRAFT_ENVIRONMENT"GIT_GRAFT_FILE" 415#define GIT_SHALLOW_FILE_ENVIRONMENT"GIT_SHALLOW_FILE" 416#define TEMPLATE_DIR_ENVIRONMENT"GIT_TEMPLATE_DIR" 417#define CONFIG_ENVIRONMENT"GIT_CONFIG" 418#define CONFIG_DATA_ENVIRONMENT"GIT_CONFIG_PARAMETERS" 419#define EXEC_PATH_ENVIRONMENT"GIT_EXEC_PATH" 420#define CEILING_DIRECTORIES_ENVIRONMENT"GIT_CEILING_DIRECTORIES" 421#define NO_REPLACE_OBJECTS_ENVIRONMENT"GIT_NO_REPLACE_OBJECTS" 422#define GIT_REPLACE_REF_BASE_ENVIRONMENT"GIT_REPLACE_REF_BASE" 423#define GITATTRIBUTES_FILE".gitattributes" 424#define INFOATTRIBUTES_FILE"info/attributes" 425#define ATTRIBUTE_MACRO_PREFIX"[attr]" 426#define GITMODULES_FILE".gitmodules" 427#define GIT_NOTES_REF_ENVIRONMENT"GIT_NOTES_REF" 428#define GIT_NOTES_DEFAULT_REF"refs/notes/commits" 429#define GIT_NOTES_DISPLAY_REF_ENVIRONMENT"GIT_NOTES_DISPLAY_REF" 430#define GIT_NOTES_REWRITE_REF_ENVIRONMENT"GIT_NOTES_REWRITE_REF" 431#define GIT_NOTES_REWRITE_MODE_ENVIRONMENT"GIT_NOTES_REWRITE_MODE" 432#define GIT_LITERAL_PATHSPECS_ENVIRONMENT"GIT_LITERAL_PATHSPECS" 433#define GIT_GLOB_PATHSPECS_ENVIRONMENT"GIT_GLOB_PATHSPECS" 434#define GIT_NOGLOB_PATHSPECS_ENVIRONMENT"GIT_NOGLOB_PATHSPECS" 435#define GIT_ICASE_PATHSPECS_ENVIRONMENT"GIT_ICASE_PATHSPECS" 436#define GIT_QUARANTINE_ENVIRONMENT"GIT_QUARANTINE_PATH" 437#define GIT_OPTIONAL_LOCKS_ENVIRONMENT"GIT_OPTIONAL_LOCKS" 438#define GIT_TEXT_DOMAIN_DIR_ENVIRONMENT"GIT_TEXTDOMAINDIR" 439 440/* 441 * Environment variable used in handshaking the wire protocol. 442 * Contains a colon ':' separated list of keys with optional values 443 * 'key[=value]'. Presence of unknown keys and values must be 444 * ignored. 445 */ 446#define GIT_PROTOCOL_ENVIRONMENT"GIT_PROTOCOL" 447/* HTTP header used to handshake the wire protocol */ 448#define GIT_PROTOCOL_HEADER"Git-Protocol" 449 450/* 451 * This environment variable is expected to contain a boolean indicating 452 * whether we should or should not treat: 453 * 454 * GIT_DIR=foo.git git ... 455 * 456 * as if GIT_WORK_TREE=. was given. It's not expected that users will make use 457 * of this, but we use it internally to communicate to sub-processes that we 458 * are in a bare repo. If not set, defaults to true. 459 */ 460#define GIT_IMPLICIT_WORK_TREE_ENVIRONMENT"GIT_IMPLICIT_WORK_TREE" 461 462/* 463 * Repository-local GIT_* environment variables; these will be cleared 464 * when git spawns a sub-process that runs inside another repository. 465 * The array is NULL-terminated, which makes it easy to pass in the "env" 466 * parameter of a run-command invocation, or to do a simple walk. 467 */ 468externconst char*const local_repo_env[]; 469 470externvoidsetup_git_env(const char*git_dir); 471 472/* 473 * Returns true iff we have a configured git repository (either via 474 * setup_git_directory, or in the environment via $GIT_DIR). 475 */ 476inthave_git_dir(void); 477 478externint is_bare_repository_cfg; 479externintis_bare_repository(void); 480externintis_inside_git_dir(void); 481externchar*git_work_tree_cfg; 482externintis_inside_work_tree(void); 483externconst char*get_git_dir(void); 484externconst char*get_git_common_dir(void); 485externchar*get_object_directory(void); 486externchar*get_index_file(void); 487externchar*get_graft_file(void); 488externvoidset_git_dir(const char*path); 489externintget_common_dir_noenv(struct strbuf *sb,const char*gitdir); 490externintget_common_dir(struct strbuf *sb,const char*gitdir); 491externconst char*get_git_namespace(void); 492externconst char*strip_namespace(const char*namespaced_ref); 493externconst char*get_super_prefix(void); 494externconst char*get_git_work_tree(void); 495 496/* 497 * Return true if the given path is a git directory; note that this _just_ 498 * looks at the directory itself. If you want to know whether "foo/.git" 499 * is a repository, you must feed that path, not just "foo". 500 */ 501externintis_git_directory(const char*path); 502 503/* 504 * Return 1 if the given path is the root of a git repository or 505 * submodule, else 0. Will not return 1 for bare repositories with the 506 * exception of creating a bare repository in "foo/.git" and calling 507 * is_git_repository("foo"). 508 * 509 * If we run into read errors, we err on the side of saying "yes, it is", 510 * as we usually consider sub-repos precious, and would prefer to err on the 511 * side of not disrupting or deleting them. 512 */ 513externintis_nonbare_repository_dir(struct strbuf *path); 514 515#define READ_GITFILE_ERR_STAT_FAILED 1 516#define READ_GITFILE_ERR_NOT_A_FILE 2 517#define READ_GITFILE_ERR_OPEN_FAILED 3 518#define READ_GITFILE_ERR_READ_FAILED 4 519#define READ_GITFILE_ERR_INVALID_FORMAT 5 520#define READ_GITFILE_ERR_NO_PATH 6 521#define READ_GITFILE_ERR_NOT_A_REPO 7 522#define READ_GITFILE_ERR_TOO_LARGE 8 523externvoidread_gitfile_error_die(int error_code,const char*path,const char*dir); 524externconst char*read_gitfile_gently(const char*path,int*return_error_code); 525#define read_gitfile(path) read_gitfile_gently((path), NULL) 526externconst char*resolve_gitdir_gently(const char*suspect,int*return_error_code); 527#define resolve_gitdir(path) resolve_gitdir_gently((path), NULL) 528 529externvoidset_git_work_tree(const char*tree); 530 531#define ALTERNATE_DB_ENVIRONMENT"GIT_ALTERNATE_OBJECT_DIRECTORIES" 532 533externvoidsetup_work_tree(void); 534/* 535 * Find the commondir and gitdir of the repository that contains the current 536 * working directory, without changing the working directory or other global 537 * state. The result is appended to commondir and gitdir. If the discovered 538 * gitdir does not correspond to a worktree, then 'commondir' and 'gitdir' will 539 * both have the same result appended to the buffer. The return value is 540 * either 0 upon success and non-zero if no repository was found. 541 */ 542externintdiscover_git_directory(struct strbuf *commondir, 543struct strbuf *gitdir); 544externconst char*setup_git_directory_gently(int*); 545externconst char*setup_git_directory(void); 546externchar*prefix_path(const char*prefix,int len,const char*path); 547externchar*prefix_path_gently(const char*prefix,int len,int*remaining,const char*path); 548 549/* 550 * Concatenate "prefix" (if len is non-zero) and "path", with no 551 * connecting characters (so "prefix" should end with a "/"). 552 * Unlike prefix_path, this should be used if the named file does 553 * not have to interact with index entry; i.e. name of a random file 554 * on the filesystem. 555 * 556 * The return value is always a newly allocated string (even if the 557 * prefix was empty). 558 */ 559externchar*prefix_filename(const char*prefix,const char*path); 560 561externintcheck_filename(const char*prefix,const char*name); 562externvoidverify_filename(const char*prefix, 563const char*name, 564int diagnose_misspelt_rev); 565externvoidverify_non_filename(const char*prefix,const char*name); 566externintpath_inside_repo(const char*prefix,const char*path); 567 568#define INIT_DB_QUIET 0x0001 569#define INIT_DB_EXIST_OK 0x0002 570 571externintinit_db(const char*git_dir,const char*real_git_dir, 572const char*template_dir,unsigned int flags); 573 574externvoidsanitize_stdfds(void); 575externintdaemonize(void); 576 577#define alloc_nr(x) (((x)+16)*3/2) 578 579/* 580 * Realloc the buffer pointed at by variable 'x' so that it can hold 581 * at least 'nr' entries; the number of entries currently allocated 582 * is 'alloc', using the standard growing factor alloc_nr() macro. 583 * 584 * DO NOT USE any expression with side-effect for 'x', 'nr', or 'alloc'. 585 */ 586#define ALLOC_GROW(x, nr, alloc) \ 587 do { \ 588 if ((nr) > alloc) { \ 589 if (alloc_nr(alloc) < (nr)) \ 590 alloc = (nr); \ 591 else \ 592 alloc = alloc_nr(alloc); \ 593 REALLOC_ARRAY(x, alloc); \ 594 } \ 595 } while (0) 596 597/* Initialize and use the cache information */ 598struct lock_file; 599externintread_index(struct index_state *); 600externintread_index_preload(struct index_state *,const struct pathspec *pathspec); 601externintdo_read_index(struct index_state *istate,const char*path, 602int must_exist);/* for testting only! */ 603externintread_index_from(struct index_state *,const char*path, 604const char*gitdir); 605externintis_index_unborn(struct index_state *); 606externintread_index_unmerged(struct index_state *); 607 608/* For use with `write_locked_index()`. */ 609#define COMMIT_LOCK (1 << 0) 610#define SKIP_IF_UNCHANGED (1 << 1) 611 612/* 613 * Write the index while holding an already-taken lock. Close the lock, 614 * and if `COMMIT_LOCK` is given, commit it. 615 * 616 * Unless a split index is in use, write the index into the lockfile. 617 * 618 * With a split index, write the shared index to a temporary file, 619 * adjust its permissions and rename it into place, then write the 620 * split index to the lockfile. If the temporary file for the shared 621 * index cannot be created, fall back to the behavior described in 622 * the previous paragraph. 623 * 624 * With `COMMIT_LOCK`, the lock is always committed or rolled back. 625 * Without it, the lock is closed, but neither committed nor rolled 626 * back. 627 * 628 * If `SKIP_IF_UNCHANGED` is given and the index is unchanged, nothing 629 * is written (and the lock is rolled back if `COMMIT_LOCK` is given). 630 */ 631externintwrite_locked_index(struct index_state *,struct lock_file *lock,unsigned flags); 632 633externintdiscard_index(struct index_state *); 634externvoidmove_index_extensions(struct index_state *dst,struct index_state *src); 635externintunmerged_index(const struct index_state *); 636 637/** 638 * Returns 1 if the index differs from HEAD, 0 otherwise. When on an unborn 639 * branch, returns 1 if there are entries in the index, 0 otherwise. If an 640 * strbuf is provided, the space-separated list of files that differ will be 641 * appended to it. 642 */ 643externintindex_has_changes(struct strbuf *sb); 644 645externintverify_path(const char*path,unsigned mode); 646externintstrcmp_offset(const char*s1,const char*s2,size_t*first_change); 647externintindex_dir_exists(struct index_state *istate,const char*name,int namelen); 648externvoidadjust_dirname_case(struct index_state *istate,char*name); 649externstruct cache_entry *index_file_exists(struct index_state *istate,const char*name,int namelen,int igncase); 650 651/* 652 * Searches for an entry defined by name and namelen in the given index. 653 * If the return value is positive (including 0) it is the position of an 654 * exact match. If the return value is negative, the negated value minus 1 655 * is the position where the entry would be inserted. 656 * Example: The current index consists of these files and its stages: 657 * 658 * b#0, d#0, f#1, f#3 659 * 660 * index_name_pos(&index, "a", 1) -> -1 661 * index_name_pos(&index, "b", 1) -> 0 662 * index_name_pos(&index, "c", 1) -> -2 663 * index_name_pos(&index, "d", 1) -> 1 664 * index_name_pos(&index, "e", 1) -> -3 665 * index_name_pos(&index, "f", 1) -> -3 666 * index_name_pos(&index, "g", 1) -> -5 667 */ 668externintindex_name_pos(const struct index_state *,const char*name,int namelen); 669 670#define ADD_CACHE_OK_TO_ADD 1/* Ok to add */ 671#define ADD_CACHE_OK_TO_REPLACE 2/* Ok to replace file/directory */ 672#define ADD_CACHE_SKIP_DFCHECK 4/* Ok to skip DF conflict checks */ 673#define ADD_CACHE_JUST_APPEND 8/* Append only; tree.c::read_tree() */ 674#define ADD_CACHE_NEW_ONLY 16/* Do not replace existing ones */ 675#define ADD_CACHE_KEEP_CACHE_TREE 32/* Do not invalidate cache-tree */ 676externintadd_index_entry(struct index_state *,struct cache_entry *ce,int option); 677externvoidrename_index_entry_at(struct index_state *,int pos,const char*new_name); 678 679/* Remove entry, return true if there are more entries to go. */ 680externintremove_index_entry_at(struct index_state *,int pos); 681 682externvoidremove_marked_cache_entries(struct index_state *istate); 683externintremove_file_from_index(struct index_state *,const char*path); 684#define ADD_CACHE_VERBOSE 1 685#define ADD_CACHE_PRETEND 2 686#define ADD_CACHE_IGNORE_ERRORS 4 687#define ADD_CACHE_IGNORE_REMOVAL 8 688#define ADD_CACHE_INTENT 16 689/* 690 * These two are used to add the contents of the file at path 691 * to the index, marking the working tree up-to-date by storing 692 * the cached stat info in the resulting cache entry. A caller 693 * that has already run lstat(2) on the path can call 694 * add_to_index(), and all others can call add_file_to_index(); 695 * the latter will do necessary lstat(2) internally before 696 * calling the former. 697 */ 698externintadd_to_index(struct index_state *,const char*path,struct stat *,int flags); 699externintadd_file_to_index(struct index_state *,const char*path,int flags); 700 701externstruct cache_entry *make_cache_entry(unsigned int mode,const unsigned char*sha1,const char*path,int stage,unsigned int refresh_options); 702externintchmod_index_entry(struct index_state *,struct cache_entry *ce,char flip); 703externintce_same_name(const struct cache_entry *a,const struct cache_entry *b); 704externvoidset_object_name_for_intent_to_add_entry(struct cache_entry *ce); 705externintindex_name_is_other(const struct index_state *,const char*,int); 706externvoid*read_blob_data_from_index(const struct index_state *,const char*,unsigned long*); 707 708/* do stat comparison even if CE_VALID is true */ 709#define CE_MATCH_IGNORE_VALID 01 710/* do not check the contents but report dirty on racily-clean entries */ 711#define CE_MATCH_RACY_IS_DIRTY 02 712/* do stat comparison even if CE_SKIP_WORKTREE is true */ 713#define CE_MATCH_IGNORE_SKIP_WORKTREE 04 714/* ignore non-existent files during stat update */ 715#define CE_MATCH_IGNORE_MISSING 0x08 716/* enable stat refresh */ 717#define CE_MATCH_REFRESH 0x10 718/* don't refresh_fsmonitor state or do stat comparison even if CE_FSMONITOR_VALID is true */ 719#define CE_MATCH_IGNORE_FSMONITOR 0X20 720externintie_match_stat(struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 721externintie_modified(struct index_state *,const struct cache_entry *,struct stat *,unsigned int); 722 723#define HASH_WRITE_OBJECT 1 724#define HASH_FORMAT_CHECK 2 725#define HASH_RENORMALIZE 4 726externintindex_fd(struct object_id *oid,int fd,struct stat *st,enum object_type type,const char*path,unsigned flags); 727externintindex_path(struct object_id *oid,const char*path,struct stat *st,unsigned flags); 728 729/* 730 * Record to sd the data from st that we use to check whether a file 731 * might have changed. 732 */ 733externvoidfill_stat_data(struct stat_data *sd,struct stat *st); 734 735/* 736 * Return 0 if st is consistent with a file not having been changed 737 * since sd was filled. If there are differences, return a 738 * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, 739 * INODE_CHANGED, and DATA_CHANGED. 740 */ 741externintmatch_stat_data(const struct stat_data *sd,struct stat *st); 742externintmatch_stat_data_racy(const struct index_state *istate, 743const struct stat_data *sd,struct stat *st); 744 745externvoidfill_stat_cache_info(struct cache_entry *ce,struct stat *st); 746 747#define REFRESH_REALLY 0x0001/* ignore_valid */ 748#define REFRESH_UNMERGED 0x0002/* allow unmerged */ 749#define REFRESH_QUIET 0x0004/* be quiet about it */ 750#define REFRESH_IGNORE_MISSING 0x0008/* ignore non-existent */ 751#define REFRESH_IGNORE_SUBMODULES 0x0010/* ignore submodules */ 752#define REFRESH_IN_PORCELAIN 0x0020/* user friendly output, not "needs update" */ 753externintrefresh_index(struct index_state *,unsigned int flags,const struct pathspec *pathspec,char*seen,const char*header_msg); 754externstruct cache_entry *refresh_cache_entry(struct cache_entry *,unsigned int); 755 756/* 757 * Opportunistically update the index but do not complain if we can't. 758 * The lockfile is always committed or rolled back. 759 */ 760externvoidupdate_index_if_able(struct index_state *,struct lock_file *); 761 762externinthold_locked_index(struct lock_file *,int); 763externvoidset_alternate_index_output(const char*); 764 765externint verify_index_checksum; 766externint verify_ce_order; 767 768/* Environment bits from configuration mechanism */ 769externint trust_executable_bit; 770externint trust_ctime; 771externint check_stat; 772externint quote_path_fully; 773externint has_symlinks; 774externint minimum_abbrev, default_abbrev; 775externint ignore_case; 776externint assume_unchanged; 777externint prefer_symlink_refs; 778externint warn_ambiguous_refs; 779externint warn_on_object_refname_ambiguity; 780externconst char*apply_default_whitespace; 781externconst char*apply_default_ignorewhitespace; 782externconst char*git_attributes_file; 783externconst char*git_hooks_path; 784externint zlib_compression_level; 785externint core_compression_level; 786externint pack_compression_level; 787externsize_t packed_git_window_size; 788externsize_t packed_git_limit; 789externsize_t delta_base_cache_limit; 790externunsigned long big_file_threshold; 791externunsigned long pack_size_limit_cfg; 792 793/* 794 * Accessors for the core.sharedrepository config which lazy-load the value 795 * from the config (if not already set). The "reset" function can be 796 * used to unset "set" or cached value, meaning that the value will be loaded 797 * fresh from the config file on the next call to get_shared_repository(). 798 */ 799voidset_shared_repository(int value); 800intget_shared_repository(void); 801voidreset_shared_repository(void); 802 803/* 804 * Do replace refs need to be checked this run? This variable is 805 * initialized to true unless --no-replace-object is used or 806 * $GIT_NO_REPLACE_OBJECTS is set, but is set to false by some 807 * commands that do not want replace references to be active. As an 808 * optimization it is also set to false if replace references have 809 * been sought but there were none. 810 */ 811externint check_replace_refs; 812externchar*git_replace_ref_base; 813 814externint fsync_object_files; 815externint core_preload_index; 816externint core_commit_graph; 817externint core_apply_sparse_checkout; 818externint precomposed_unicode; 819externint protect_hfs; 820externint protect_ntfs; 821externconst char*core_fsmonitor; 822 823/* 824 * Include broken refs in all ref iterations, which will 825 * generally choke dangerous operations rather than letting 826 * them silently proceed without taking the broken ref into 827 * account. 828 */ 829externint ref_paranoia; 830 831/* 832 * Returns the boolean value of $GIT_OPTIONAL_LOCKS (or the default value). 833 */ 834intuse_optional_locks(void); 835 836/* 837 * The character that begins a commented line in user-editable file 838 * that is subject to stripspace. 839 */ 840externchar comment_line_char; 841externint auto_comment_line_char; 842 843/* Windows only */ 844enum hide_dotfiles_type { 845 HIDE_DOTFILES_FALSE =0, 846 HIDE_DOTFILES_TRUE, 847 HIDE_DOTFILES_DOTGITONLY 848}; 849externenum hide_dotfiles_type hide_dotfiles; 850 851enum log_refs_config { 852 LOG_REFS_UNSET = -1, 853 LOG_REFS_NONE =0, 854 LOG_REFS_NORMAL, 855 LOG_REFS_ALWAYS 856}; 857externenum log_refs_config log_all_ref_updates; 858 859enum branch_track { 860 BRANCH_TRACK_UNSPECIFIED = -1, 861 BRANCH_TRACK_NEVER =0, 862 BRANCH_TRACK_REMOTE, 863 BRANCH_TRACK_ALWAYS, 864 BRANCH_TRACK_EXPLICIT, 865 BRANCH_TRACK_OVERRIDE 866}; 867 868enum rebase_setup_type { 869 AUTOREBASE_NEVER =0, 870 AUTOREBASE_LOCAL, 871 AUTOREBASE_REMOTE, 872 AUTOREBASE_ALWAYS 873}; 874 875enum push_default_type { 876 PUSH_DEFAULT_NOTHING =0, 877 PUSH_DEFAULT_MATCHING, 878 PUSH_DEFAULT_SIMPLE, 879 PUSH_DEFAULT_UPSTREAM, 880 PUSH_DEFAULT_CURRENT, 881 PUSH_DEFAULT_UNSPECIFIED 882}; 883 884externenum branch_track git_branch_track; 885externenum rebase_setup_type autorebase; 886externenum push_default_type push_default; 887 888enum object_creation_mode { 889 OBJECT_CREATION_USES_HARDLINKS =0, 890 OBJECT_CREATION_USES_RENAMES =1 891}; 892 893externenum object_creation_mode object_creation_mode; 894 895externchar*notes_ref_name; 896 897externint grafts_replace_parents; 898 899/* 900 * GIT_REPO_VERSION is the version we write by default. The 901 * _READ variant is the highest number we know how to 902 * handle. 903 */ 904#define GIT_REPO_VERSION 0 905#define GIT_REPO_VERSION_READ 1 906externint repository_format_precious_objects; 907externchar*repository_format_partial_clone; 908externconst char*core_partial_clone_filter_default; 909 910struct repository_format { 911int version; 912int precious_objects; 913char*partial_clone;/* value of extensions.partialclone */ 914int is_bare; 915int hash_algo; 916char*work_tree; 917struct string_list unknown_extensions; 918}; 919 920/* 921 * Read the repository format characteristics from the config file "path" into 922 * "format" struct. Returns the numeric version. On error, -1 is returned, 923 * format->version is set to -1, and all other fields in the struct are 924 * undefined. 925 */ 926intread_repository_format(struct repository_format *format,const char*path); 927 928/* 929 * Verify that the repository described by repository_format is something we 930 * can read. If it is, return 0. Otherwise, return -1, and "err" will describe 931 * any errors encountered. 932 */ 933intverify_repository_format(const struct repository_format *format, 934struct strbuf *err); 935 936/* 937 * Check the repository format version in the path found in get_git_dir(), 938 * and die if it is a version we don't understand. Generally one would 939 * set_git_dir() before calling this, and use it only for "are we in a valid 940 * repo?". 941 */ 942externvoidcheck_repository_format(void); 943 944#define MTIME_CHANGED 0x0001 945#define CTIME_CHANGED 0x0002 946#define OWNER_CHANGED 0x0004 947#define MODE_CHANGED 0x0008 948#define INODE_CHANGED 0x0010 949#define DATA_CHANGED 0x0020 950#define TYPE_CHANGED 0x0040 951 952/* 953 * Return an abbreviated sha1 unique within this repository's object database. 954 * The result will be at least `len` characters long, and will be NUL 955 * terminated. 956 * 957 * The non-`_r` version returns a static buffer which remains valid until 4 958 * more calls to find_unique_abbrev are made. 959 * 960 * The `_r` variant writes to a buffer supplied by the caller, which must be at 961 * least `GIT_MAX_HEXSZ + 1` bytes. The return value is the number of bytes 962 * written (excluding the NUL terminator). 963 * 964 * Note that while this version avoids the static buffer, it is not fully 965 * reentrant, as it calls into other non-reentrant git code. 966 */ 967externconst char*find_unique_abbrev(const struct object_id *oid,int len); 968externintfind_unique_abbrev_r(char*hex,const struct object_id *oid,int len); 969 970externconst unsigned char null_sha1[GIT_MAX_RAWSZ]; 971externconst struct object_id null_oid; 972 973staticinlineinthashcmp(const unsigned char*sha1,const unsigned char*sha2) 974{ 975returnmemcmp(sha1, sha2, GIT_SHA1_RAWSZ); 976} 977 978staticinlineintoidcmp(const struct object_id *oid1,const struct object_id *oid2) 979{ 980returnhashcmp(oid1->hash, oid2->hash); 981} 982 983staticinlineintis_null_sha1(const unsigned char*sha1) 984{ 985return!hashcmp(sha1, null_sha1); 986} 987 988staticinlineintis_null_oid(const struct object_id *oid) 989{ 990return!hashcmp(oid->hash, null_sha1); 991} 992 993staticinlinevoidhashcpy(unsigned char*sha_dst,const unsigned char*sha_src) 994{ 995memcpy(sha_dst, sha_src, GIT_SHA1_RAWSZ); 996} 997 998staticinlinevoidoidcpy(struct object_id *dst,const struct object_id *src) 999{1000hashcpy(dst->hash, src->hash);1001}10021003staticinlinestruct object_id *oiddup(const struct object_id *src)1004{1005struct object_id *dst =xmalloc(sizeof(struct object_id));1006oidcpy(dst, src);1007return dst;1008}10091010staticinlinevoidhashclr(unsigned char*hash)1011{1012memset(hash,0, GIT_SHA1_RAWSZ);1013}10141015staticinlinevoidoidclr(struct object_id *oid)1016{1017memset(oid->hash,0, GIT_MAX_RAWSZ);1018}10191020staticinlinevoidoidread(struct object_id *oid,const unsigned char*hash)1021{1022memcpy(oid->hash, hash, the_hash_algo->rawsz);1023}10241025staticinlineintis_empty_blob_sha1(const unsigned char*sha1)1026{1027return!hashcmp(sha1, the_hash_algo->empty_blob->hash);1028}10291030staticinlineintis_empty_blob_oid(const struct object_id *oid)1031{1032return!oidcmp(oid, the_hash_algo->empty_blob);1033}10341035staticinlineintis_empty_tree_sha1(const unsigned char*sha1)1036{1037return!hashcmp(sha1, the_hash_algo->empty_tree->hash);1038}10391040staticinlineintis_empty_tree_oid(const struct object_id *oid)1041{1042return!oidcmp(oid, the_hash_algo->empty_tree);1043}10441045const char*empty_tree_oid_hex(void);1046const char*empty_blob_oid_hex(void);10471048/* set default permissions by passing mode arguments to open(2) */1049intgit_mkstemps_mode(char*pattern,int suffix_len,int mode);1050intgit_mkstemp_mode(char*pattern,int mode);10511052/*1053 * NOTE NOTE NOTE!!1054 *1055 * PERM_UMASK, OLD_PERM_GROUP and OLD_PERM_EVERYBODY enumerations must1056 * not be changed. Old repositories have core.sharedrepository written in1057 * numeric format, and therefore these values are preserved for compatibility1058 * reasons.1059 */1060enum sharedrepo {1061 PERM_UMASK =0,1062 OLD_PERM_GROUP =1,1063 OLD_PERM_EVERYBODY =2,1064 PERM_GROUP =0660,1065 PERM_EVERYBODY =06641066};1067intgit_config_perm(const char*var,const char*value);1068intadjust_shared_perm(const char*path);10691070/*1071 * Create the directory containing the named path, using care to be1072 * somewhat safe against races. Return one of the scld_error values to1073 * indicate success/failure. On error, set errno to describe the1074 * problem.1075 *1076 * SCLD_VANISHED indicates that one of the ancestor directories of the1077 * path existed at one point during the function call and then1078 * suddenly vanished, probably because another process pruned the1079 * directory while we were working. To be robust against this kind of1080 * race, callers might want to try invoking the function again when it1081 * returns SCLD_VANISHED.1082 *1083 * safe_create_leading_directories() temporarily changes path while it1084 * is working but restores it before returning.1085 * safe_create_leading_directories_const() doesn't modify path, even1086 * temporarily.1087 */1088enum scld_error {1089 SCLD_OK =0,1090 SCLD_FAILED = -1,1091 SCLD_PERMS = -2,1092 SCLD_EXISTS = -3,1093 SCLD_VANISHED = -41094};1095enum scld_error safe_create_leading_directories(char*path);1096enum scld_error safe_create_leading_directories_const(const char*path);10971098/*1099 * Callback function for raceproof_create_file(). This function is1100 * expected to do something that makes dirname(path) permanent despite1101 * the fact that other processes might be cleaning up empty1102 * directories at the same time. Usually it will create a file named1103 * path, but alternatively it could create another file in that1104 * directory, or even chdir() into that directory. The function should1105 * return 0 if the action was completed successfully. On error, it1106 * should return a nonzero result and set errno.1107 * raceproof_create_file() treats two errno values specially:1108 *1109 * - ENOENT -- dirname(path) does not exist. In this case,1110 * raceproof_create_file() tries creating dirname(path)1111 * (and any parent directories, if necessary) and calls1112 * the function again.1113 *1114 * - EISDIR -- the file already exists and is a directory. In this1115 * case, raceproof_create_file() removes the directory if1116 * it is empty (and recursively any empty directories that1117 * it contains) and calls the function again.1118 *1119 * Any other errno causes raceproof_create_file() to fail with the1120 * callback's return value and errno.1121 *1122 * Obviously, this function should be OK with being called again if it1123 * fails with ENOENT or EISDIR. In other scenarios it will not be1124 * called again.1125 */1126typedefintcreate_file_fn(const char*path,void*cb);11271128/*1129 * Create a file in dirname(path) by calling fn, creating leading1130 * directories if necessary. Retry a few times in case we are racing1131 * with another process that is trying to clean up the directory that1132 * contains path. See the documentation for create_file_fn for more1133 * details.1134 *1135 * Return the value and set the errno that resulted from the most1136 * recent call of fn. fn is always called at least once, and will be1137 * called more than once if it returns ENOENT or EISDIR.1138 */1139intraceproof_create_file(const char*path, create_file_fn fn,void*cb);11401141intmkdir_in_gitdir(const char*path);1142externchar*expand_user_path(const char*path,int real_home);1143const char*enter_repo(const char*path,int strict);1144staticinlineintis_absolute_path(const char*path)1145{1146returnis_dir_sep(path[0]) ||has_dos_drive_prefix(path);1147}1148intis_directory(const char*);1149char*strbuf_realpath(struct strbuf *resolved,const char*path,1150int die_on_error);1151const char*real_path(const char*path);1152const char*real_path_if_valid(const char*path);1153char*real_pathdup(const char*path,int die_on_error);1154const char*absolute_path(const char*path);1155char*absolute_pathdup(const char*path);1156const char*remove_leading_path(const char*in,const char*prefix);1157const char*relative_path(const char*in,const char*prefix,struct strbuf *sb);1158intnormalize_path_copy_len(char*dst,const char*src,int*prefix_len);1159intnormalize_path_copy(char*dst,const char*src);1160intlongest_ancestor_length(const char*path,struct string_list *prefixes);1161char*strip_path_suffix(const char*path,const char*suffix);1162intdaemon_avoid_alias(const char*path);11631164/*1165 * These functions match their is_hfs_dotgit() counterparts; see utf8.h for1166 * details.1167 */1168intis_ntfs_dotgit(const char*name);1169intis_ntfs_dotgitmodules(const char*name);1170intis_ntfs_dotgitignore(const char*name);1171intis_ntfs_dotgitattributes(const char*name);11721173/*1174 * Returns true iff "str" could be confused as a command-line option when1175 * passed to a sub-program like "ssh". Note that this has nothing to do with1176 * shell-quoting, which should be handled separately; we're assuming here that1177 * the string makes it verbatim to the sub-program.1178 */1179intlooks_like_command_line_option(const char*str);11801181/**1182 * Return a newly allocated string with the evaluation of1183 * "$XDG_CONFIG_HOME/git/$filename" if $XDG_CONFIG_HOME is non-empty, otherwise1184 * "$HOME/.config/git/$filename". Return NULL upon error.1185 */1186externchar*xdg_config_home(const char*filename);11871188/**1189 * Return a newly allocated string with the evaluation of1190 * "$XDG_CACHE_HOME/git/$filename" if $XDG_CACHE_HOME is non-empty, otherwise1191 * "$HOME/.cache/git/$filename". Return NULL upon error.1192 */1193externchar*xdg_cache_home(const char*filename);11941195externvoid*read_object_file_extended(const struct object_id *oid,1196enum object_type *type,1197unsigned long*size,int lookup_replace);1198staticinlinevoid*read_object_file(const struct object_id *oid,enum object_type *type,unsigned long*size)1199{1200returnread_object_file_extended(oid, type, size,1);1201}12021203/* Read and unpack an object file into memory, write memory to an object file */1204intoid_object_info(struct repository *r,const struct object_id *,unsigned long*);12051206externinthash_object_file(const void*buf,unsigned long len,1207const char*type,struct object_id *oid);12081209externintwrite_object_file(const void*buf,unsigned long len,1210const char*type,struct object_id *oid);12111212externinthash_object_file_literally(const void*buf,unsigned long len,1213const char*type,struct object_id *oid,1214unsigned flags);12151216externintpretend_object_file(void*,unsigned long,enum object_type,1217struct object_id *oid);12181219externintforce_object_loose(const struct object_id *oid,time_t mtime);12201221externintgit_open_cloexec(const char*name,int flags);1222#define git_open(name) git_open_cloexec(name, O_RDONLY)1223externintunpack_sha1_header(git_zstream *stream,unsigned char*map,unsigned long mapsize,void*buffer,unsigned long bufsiz);1224externintparse_sha1_header(const char*hdr,unsigned long*sizep);12251226externintcheck_object_signature(const struct object_id *oid,void*buf,unsigned long size,const char*type);12271228externintfinalize_object_file(const char*tmpfile,const char*filename);12291230/*1231 * Open the loose object at path, check its hash, and return the contents,1232 * type, and size. If the object is a blob, then "contents" may return NULL,1233 * to allow streaming of large blobs.1234 *1235 * Returns 0 on success, negative on error (details may be written to stderr).1236 */1237intread_loose_object(const char*path,1238const struct object_id *expected_oid,1239enum object_type *type,1240unsigned long*size,1241void**contents);12421243/*1244 * Convenience for sha1_object_info_extended() with a NULL struct1245 * object_info. OBJECT_INFO_SKIP_CACHED is automatically set; pass1246 * nonzero flags to also set other flags.1247 */1248externinthas_sha1_file_with_flags(const unsigned char*sha1,int flags);1249staticinlineinthas_sha1_file(const unsigned char*sha1)1250{1251returnhas_sha1_file_with_flags(sha1,0);1252}12531254/* Same as the above, except for struct object_id. */1255externinthas_object_file(const struct object_id *oid);1256externinthas_object_file_with_flags(const struct object_id *oid,int flags);12571258/*1259 * Return true iff an alternate object database has a loose object1260 * with the specified name. This function does not respect replace1261 * references.1262 */1263externinthas_loose_object_nonlocal(const struct object_id *oid);12641265externvoidassert_oid_type(const struct object_id *oid,enum object_type expect);12661267/* Helper to check and "touch" a file */1268externintcheck_and_freshen_file(const char*fn,int freshen);12691270externconst signed char hexval_table[256];1271staticinlineunsigned inthexval(unsigned char c)1272{1273return hexval_table[c];1274}12751276/*1277 * Convert two consecutive hexadecimal digits into a char. Return a1278 * negative value on error. Don't run over the end of short strings.1279 */1280staticinlineinthex2chr(const char*s)1281{1282unsigned int val =hexval(s[0]);1283return(val & ~0xf) ? val : (val <<4) |hexval(s[1]);1284}12851286/* Convert to/from hex/sha1 representation */1287#define MINIMUM_ABBREV minimum_abbrev1288#define DEFAULT_ABBREV default_abbrev12891290/* used when the code does not know or care what the default abbrev is */1291#define FALLBACK_DEFAULT_ABBREV 712921293struct object_context {1294unsigned mode;1295/*1296 * symlink_path is only used by get_tree_entry_follow_symlinks,1297 * and only for symlinks that point outside the repository.1298 */1299struct strbuf symlink_path;1300/*1301 * If GET_OID_RECORD_PATH is set, this will record path (if any)1302 * found when resolving the name. The caller is responsible for1303 * releasing the memory.1304 */1305char*path;1306};13071308#define GET_OID_QUIETLY 011309#define GET_OID_COMMIT 021310#define GET_OID_COMMITTISH 041311#define GET_OID_TREE 0101312#define GET_OID_TREEISH 0201313#define GET_OID_BLOB 0401314#define GET_OID_FOLLOW_SYMLINKS 01001315#define GET_OID_RECORD_PATH 02001316#define GET_OID_ONLY_TO_DIE 0400013171318#define GET_OID_DISAMBIGUATORS \1319 (GET_OID_COMMIT | GET_OID_COMMITTISH | \1320 GET_OID_TREE | GET_OID_TREEISH | \1321 GET_OID_BLOB)13221323externintget_oid(const char*str,struct object_id *oid);1324externintget_oid_commit(const char*str,struct object_id *oid);1325externintget_oid_committish(const char*str,struct object_id *oid);1326externintget_oid_tree(const char*str,struct object_id *oid);1327externintget_oid_treeish(const char*str,struct object_id *oid);1328externintget_oid_blob(const char*str,struct object_id *oid);1329externvoidmaybe_die_on_misspelt_object_name(const char*name,const char*prefix);1330externintget_oid_with_context(const char*str,unsigned flags,struct object_id *oid,struct object_context *oc);133113321333typedefinteach_abbrev_fn(const struct object_id *oid,void*);1334externintfor_each_abbrev(const char*prefix, each_abbrev_fn,void*);13351336externintset_disambiguate_hint_config(const char*var,const char*value);13371338/*1339 * Try to read a SHA1 in hexadecimal format from the 40 characters1340 * starting at hex. Write the 20-byte result to sha1 in binary form.1341 * Return 0 on success. Reading stops if a NUL is encountered in the1342 * input, so it is safe to pass this function an arbitrary1343 * null-terminated string.1344 */1345externintget_sha1_hex(const char*hex,unsigned char*sha1);1346externintget_oid_hex(const char*hex,struct object_id *sha1);13471348/*1349 * Read `len` pairs of hexadecimal digits from `hex` and write the1350 * values to `binary` as `len` bytes. Return 0 on success, or -1 if1351 * the input does not consist of hex digits).1352 */1353externinthex_to_bytes(unsigned char*binary,const char*hex,size_t len);13541355/*1356 * Convert a binary sha1 to its hex equivalent. The `_r` variant is reentrant,1357 * and writes the NUL-terminated output to the buffer `out`, which must be at1358 * least `GIT_SHA1_HEXSZ + 1` bytes, and returns a pointer to out for1359 * convenience.1360 *1361 * The non-`_r` variant returns a static buffer, but uses a ring of 41362 * buffers, making it safe to make multiple calls for a single statement, like:1363 *1364 * printf("%s -> %s", sha1_to_hex(one), sha1_to_hex(two));1365 */1366externchar*sha1_to_hex_r(char*out,const unsigned char*sha1);1367externchar*oid_to_hex_r(char*out,const struct object_id *oid);1368externchar*sha1_to_hex(const unsigned char*sha1);/* static buffer result! */1369externchar*oid_to_hex(const struct object_id *oid);/* same static buffer as sha1_to_hex */13701371/*1372 * Parse a 40-character hexadecimal object ID starting from hex, updating the1373 * pointer specified by end when parsing stops. The resulting object ID is1374 * stored in oid. Returns 0 on success. Parsing will stop on the first NUL or1375 * other invalid character. end is only updated on success; otherwise, it is1376 * unmodified.1377 */1378externintparse_oid_hex(const char*hex,struct object_id *oid,const char**end);13791380/*1381 * This reads short-hand syntax that not only evaluates to a commit1382 * object name, but also can act as if the end user spelled the name1383 * of the branch from the command line.1384 *1385 * - "@{-N}" finds the name of the Nth previous branch we were on, and1386 * places the name of the branch in the given buf and returns the1387 * number of characters parsed if successful.1388 *1389 * - "<branch>@{upstream}" finds the name of the other ref that1390 * <branch> is configured to merge with (missing <branch> defaults1391 * to the current branch), and places the name of the branch in the1392 * given buf and returns the number of characters parsed if1393 * successful.1394 *1395 * If the input is not of the accepted format, it returns a negative1396 * number to signal an error.1397 *1398 * If the input was ok but there are not N branch switches in the1399 * reflog, it returns 0.1400 *1401 * If "allowed" is non-zero, it is a treated as a bitfield of allowable1402 * expansions: local branches ("refs/heads/"), remote branches1403 * ("refs/remotes/"), or "HEAD". If no "allowed" bits are set, any expansion is1404 * allowed, even ones to refs outside of those namespaces.1405 */1406#define INTERPRET_BRANCH_LOCAL (1<<0)1407#define INTERPRET_BRANCH_REMOTE (1<<1)1408#define INTERPRET_BRANCH_HEAD (1<<2)1409externintinterpret_branch_name(const char*str,int len,struct strbuf *,1410unsigned allowed);1411externintget_oid_mb(const char*str,struct object_id *oid);14121413externintvalidate_headref(const char*ref);14141415externintbase_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1416externintdf_name_compare(const char*name1,int len1,int mode1,const char*name2,int len2,int mode2);1417externintname_compare(const char*name1,size_t len1,const char*name2,size_t len2);1418externintcache_name_stage_compare(const char*name1,int len1,int stage1,const char*name2,int len2,int stage2);14191420externvoid*read_object_with_reference(const struct object_id *oid,1421const char*required_type,1422unsigned long*size,1423struct object_id *oid_ret);14241425externstruct object *peel_to_type(const char*name,int namelen,1426struct object *o,enum object_type);14271428struct date_mode {1429enum date_mode_type {1430 DATE_NORMAL =0,1431 DATE_RELATIVE,1432 DATE_SHORT,1433 DATE_ISO8601,1434 DATE_ISO8601_STRICT,1435 DATE_RFC2822,1436 DATE_STRFTIME,1437 DATE_RAW,1438 DATE_UNIX1439} type;1440const char*strftime_fmt;1441int local;1442};14431444/*1445 * Convenience helper for passing a constant type, like:1446 *1447 * show_date(t, tz, DATE_MODE(NORMAL));1448 */1449#define DATE_MODE(t) date_mode_from_type(DATE_##t)1450struct date_mode *date_mode_from_type(enum date_mode_type type);14511452const char*show_date(timestamp_t time,int timezone,const struct date_mode *mode);1453voidshow_date_relative(timestamp_t time,int tz,const struct timeval *now,1454struct strbuf *timebuf);1455intparse_date(const char*date,struct strbuf *out);1456intparse_date_basic(const char*date, timestamp_t *timestamp,int*offset);1457intparse_expiry_date(const char*date, timestamp_t *timestamp);1458voiddatestamp(struct strbuf *out);1459#define approxidate(s) approxidate_careful((s), NULL)1460timestamp_t approxidate_careful(const char*,int*);1461timestamp_t approxidate_relative(const char*date,const struct timeval *now);1462voidparse_date_format(const char*format,struct date_mode *mode);1463intdate_overflows(timestamp_t date);14641465#define IDENT_STRICT 11466#define IDENT_NO_DATE 21467#define IDENT_NO_NAME 41468externconst char*git_author_info(int);1469externconst char*git_committer_info(int);1470externconst char*fmt_ident(const char*name,const char*email,const char*date_str,int);1471externconst char*fmt_name(const char*name,const char*email);1472externconst char*ident_default_name(void);1473externconst char*ident_default_email(void);1474externconst char*git_editor(void);1475externconst char*git_pager(int stdout_is_tty);1476externintis_terminal_dumb(void);1477externintgit_ident_config(const char*,const char*,void*);1478externvoidreset_ident_date(void);14791480struct ident_split {1481const char*name_begin;1482const char*name_end;1483const char*mail_begin;1484const char*mail_end;1485const char*date_begin;1486const char*date_end;1487const char*tz_begin;1488const char*tz_end;1489};1490/*1491 * Signals an success with 0, but time part of the result may be NULL1492 * if the input lacks timestamp and zone1493 */1494externintsplit_ident_line(struct ident_split *,const char*,int);14951496/*1497 * Like show_date, but pull the timestamp and tz parameters from1498 * the ident_split. It will also sanity-check the values and produce1499 * a well-known sentinel date if they appear bogus.1500 */1501const char*show_ident_date(const struct ident_split *id,1502const struct date_mode *mode);15031504/*1505 * Compare split idents for equality or strict ordering. Note that we1506 * compare only the ident part of the line, ignoring any timestamp.1507 *1508 * Because there are two fields, we must choose one as the primary key; we1509 * currently arbitrarily pick the email.1510 */1511externintident_cmp(const struct ident_split *,const struct ident_split *);15121513struct checkout {1514struct index_state *istate;1515const char*base_dir;1516int base_dir_len;1517struct delayed_checkout *delayed_checkout;1518unsigned force:1,1519 quiet:1,1520 not_new:1,1521 refresh_cache:1;1522};1523#define CHECKOUT_INIT { NULL,"" }15241525#define TEMPORARY_FILENAME_LENGTH 251526externintcheckout_entry(struct cache_entry *ce,const struct checkout *state,char*topath);1527externvoidenable_delayed_checkout(struct checkout *state);1528externintfinish_delayed_checkout(struct checkout *state);15291530struct cache_def {1531struct strbuf path;1532int flags;1533int track_flags;1534int prefix_len_stat_func;1535};1536#define CACHE_DEF_INIT { STRBUF_INIT, 0, 0, 0 }1537staticinlinevoidcache_def_clear(struct cache_def *cache)1538{1539strbuf_release(&cache->path);1540}15411542externinthas_symlink_leading_path(const char*name,int len);1543externintthreaded_has_symlink_leading_path(struct cache_def *,const char*,int);1544externintcheck_leading_path(const char*name,int len);1545externinthas_dirs_only_path(const char*name,int len,int prefix_len);1546externvoidschedule_dir_for_removal(const char*name,int len);1547externvoidremove_scheduled_dirs(void);15481549struct pack_window {1550struct pack_window *next;1551unsigned char*base;1552 off_t offset;1553size_t len;1554unsigned int last_used;1555unsigned int inuse_cnt;1556};15571558struct pack_entry {1559 off_t offset;1560struct packed_git *p;1561};15621563/*1564 * Create a temporary file rooted in the object database directory, or1565 * die on failure. The filename is taken from "pattern", which should have the1566 * usual "XXXXXX" trailer, and the resulting filename is written into the1567 * "template" buffer. Returns the open descriptor.1568 */1569externintodb_mkstemp(struct strbuf *temp_filename,const char*pattern);15701571/*1572 * Create a pack .keep file named "name" (which should generally be the output1573 * of odb_pack_name). Returns a file descriptor opened for writing, or -1 on1574 * error.1575 */1576externintodb_pack_keep(const char*name);15771578/*1579 * Iterate over the files in the loose-object parts of the object1580 * directory "path", triggering the following callbacks:1581 *1582 * - loose_object is called for each loose object we find.1583 *1584 * - loose_cruft is called for any files that do not appear to be1585 * loose objects. Note that we only look in the loose object1586 * directories "objects/[0-9a-f]{2}/", so we will not report1587 * "objects/foobar" as cruft.1588 *1589 * - loose_subdir is called for each top-level hashed subdirectory1590 * of the object directory (e.g., "$OBJDIR/f0"). It is called1591 * after the objects in the directory are processed.1592 *1593 * Any callback that is NULL will be ignored. Callbacks returning non-zero1594 * will end the iteration.1595 *1596 * In the "buf" variant, "path" is a strbuf which will also be used as a1597 * scratch buffer, but restored to its original contents before1598 * the function returns.1599 */1600typedefinteach_loose_object_fn(const struct object_id *oid,1601const char*path,1602void*data);1603typedefinteach_loose_cruft_fn(const char*basename,1604const char*path,1605void*data);1606typedefinteach_loose_subdir_fn(unsigned int nr,1607const char*path,1608void*data);1609intfor_each_file_in_obj_subdir(unsigned int subdir_nr,1610struct strbuf *path,1611 each_loose_object_fn obj_cb,1612 each_loose_cruft_fn cruft_cb,1613 each_loose_subdir_fn subdir_cb,1614void*data);1615intfor_each_loose_file_in_objdir(const char*path,1616 each_loose_object_fn obj_cb,1617 each_loose_cruft_fn cruft_cb,1618 each_loose_subdir_fn subdir_cb,1619void*data);1620intfor_each_loose_file_in_objdir_buf(struct strbuf *path,1621 each_loose_object_fn obj_cb,1622 each_loose_cruft_fn cruft_cb,1623 each_loose_subdir_fn subdir_cb,1624void*data);16251626/*1627 * Iterate over loose objects in both the local1628 * repository and any alternates repositories (unless the1629 * LOCAL_ONLY flag is set).1630 */1631#define FOR_EACH_OBJECT_LOCAL_ONLY 0x11632externintfor_each_loose_object(each_loose_object_fn,void*,unsigned flags);16331634struct object_info {1635/* Request */1636enum object_type *typep;1637unsigned long*sizep;1638 off_t *disk_sizep;1639unsigned char*delta_base_sha1;1640struct strbuf *type_name;1641void**contentp;16421643/* Response */1644enum{1645 OI_CACHED,1646 OI_LOOSE,1647 OI_PACKED,1648 OI_DBCACHED1649} whence;1650union{1651/*1652 * struct {1653 * ... Nothing to expose in this case1654 * } cached;1655 * struct {1656 * ... Nothing to expose in this case1657 * } loose;1658 */1659struct{1660struct packed_git *pack;1661 off_t offset;1662unsigned int is_delta;1663} packed;1664} u;1665};16661667/*1668 * Initializer for a "struct object_info" that wants no items. You may1669 * also memset() the memory to all-zeroes.1670 */1671#define OBJECT_INFO_INIT {NULL}16721673/* Invoke lookup_replace_object() on the given hash */1674#define OBJECT_INFO_LOOKUP_REPLACE 11675/* Allow reading from a loose object file of unknown/bogus type */1676#define OBJECT_INFO_ALLOW_UNKNOWN_TYPE 21677/* Do not check cached storage */1678#define OBJECT_INFO_SKIP_CACHED 41679/* Do not retry packed storage after checking packed and loose storage */1680#define OBJECT_INFO_QUICK 81681/* Do not check loose object */1682#define OBJECT_INFO_IGNORE_LOOSE 1616831684intoid_object_info_extended(struct repository *r,1685const struct object_id *,1686struct object_info *,unsigned flags);16871688/*1689 * Set this to 0 to prevent sha1_object_info_extended() from fetching missing1690 * blobs. This has a difference only if extensions.partialClone is set.1691 *1692 * Its default value is 1.1693 */1694externint fetch_if_missing;16951696/* Dumb servers support */1697externintupdate_server_info(int);16981699externconst char*get_log_output_encoding(void);1700externconst char*get_commit_output_encoding(void);17011702/*1703 * This is a hack for test programs like test-dump-untracked-cache to1704 * ensure that they do not modify the untracked cache when reading it.1705 * Do not use it otherwise!1706 */1707externint ignore_untracked_cache_config;17081709externintcommitter_ident_sufficiently_given(void);1710externintauthor_ident_sufficiently_given(void);17111712externconst char*git_commit_encoding;1713externconst char*git_log_output_encoding;1714externconst char*git_mailmap_file;1715externconst char*git_mailmap_blob;17161717/* IO helper functions */1718externvoidmaybe_flush_or_die(FILE*,const char*);1719__attribute__((format(printf,2,3)))1720externvoidfprintf_or_die(FILE*,const char*fmt, ...);17211722#define COPY_READ_ERROR (-2)1723#define COPY_WRITE_ERROR (-3)1724externintcopy_fd(int ifd,int ofd);1725externintcopy_file(const char*dst,const char*src,int mode);1726externintcopy_file_with_time(const char*dst,const char*src,int mode);17271728externvoidwrite_or_die(int fd,const void*buf,size_t count);1729externvoidfsync_or_die(int fd,const char*);17301731extern ssize_t read_in_full(int fd,void*buf,size_t count);1732extern ssize_t write_in_full(int fd,const void*buf,size_t count);1733extern ssize_t pread_in_full(int fd,void*buf,size_t count, off_t offset);17341735staticinline ssize_t write_str_in_full(int fd,const char*str)1736{1737returnwrite_in_full(fd, str,strlen(str));1738}17391740/**1741 * Open (and truncate) the file at path, write the contents of buf to it,1742 * and close it. Dies if any errors are encountered.1743 */1744externvoidwrite_file_buf(const char*path,const char*buf,size_t len);17451746/**1747 * Like write_file_buf(), but format the contents into a buffer first.1748 * Additionally, write_file() will append a newline if one is not already1749 * present, making it convenient to write text files:1750 *1751 * write_file(path, "counter: %d", ctr);1752 */1753__attribute__((format(printf,2,3)))1754externvoidwrite_file(const char*path,const char*fmt, ...);17551756/* pager.c */1757externvoidsetup_pager(void);1758externintpager_in_use(void);1759externint pager_use_color;1760externintterm_columns(void);1761externintdecimal_width(uintmax_t);1762externintcheck_pager_config(const char*cmd);1763externvoidprepare_pager_args(struct child_process *,const char*pager);17641765externconst char*editor_program;1766externconst char*askpass_program;1767externconst char*excludes_file;17681769/* base85 */1770intdecode_85(char*dst,const char*line,int linelen);1771voidencode_85(char*buf,const unsigned char*data,int bytes);17721773/* pkt-line.c */1774voidpacket_trace_identity(const char*prog);17751776/* add */1777/*1778 * return 0 if success, 1 - if addition of a file failed and1779 * ADD_FILES_IGNORE_ERRORS was specified in flags1780 */1781intadd_files_to_cache(const char*prefix,const struct pathspec *pathspec,int flags);17821783/* diff.c */1784externint diff_auto_refresh_index;17851786/* match-trees.c */1787voidshift_tree(const struct object_id *,const struct object_id *,struct object_id *,int);1788voidshift_tree_by(const struct object_id *,const struct object_id *,struct object_id *,const char*);17891790/*1791 * whitespace rules.1792 * used by both diff and apply1793 * last two digits are tab width1794 */1795#define WS_BLANK_AT_EOL 01001796#define WS_SPACE_BEFORE_TAB 02001797#define WS_INDENT_WITH_NON_TAB 04001798#define WS_CR_AT_EOL 010001799#define WS_BLANK_AT_EOF 020001800#define WS_TAB_IN_INDENT 040001801#define WS_TRAILING_SPACE (WS_BLANK_AT_EOL|WS_BLANK_AT_EOF)1802#define WS_DEFAULT_RULE (WS_TRAILING_SPACE|WS_SPACE_BEFORE_TAB|8)1803#define WS_TAB_WIDTH_MASK 0771804/* All WS_* -- when extended, adapt diff.c emit_symbol */1805#define WS_RULE_MASK 077771806externunsigned whitespace_rule_cfg;1807externunsignedwhitespace_rule(const char*);1808externunsignedparse_whitespace_rule(const char*);1809externunsignedws_check(const char*line,int len,unsigned ws_rule);1810externvoidws_check_emit(const char*line,int len,unsigned ws_rule,FILE*stream,const char*set,const char*reset,const char*ws);1811externchar*whitespace_error_string(unsigned ws);1812externvoidws_fix_copy(struct strbuf *,const char*,int,unsigned,int*);1813externintws_blank_line(const char*line,int len,unsigned ws_rule);1814#define ws_tab_width(rule) ((rule) & WS_TAB_WIDTH_MASK)18151816/* ls-files */1817voidoverlay_tree_on_index(struct index_state *istate,1818const char*tree_name,const char*prefix);18191820/* setup.c */1821struct startup_info {1822int have_repository;1823const char*prefix;1824};1825externstruct startup_info *startup_info;18261827/* merge.c */1828struct commit_list;1829inttry_merge_command(const char*strategy,size_t xopts_nr,1830const char**xopts,struct commit_list *common,1831const char*head_arg,struct commit_list *remotes);1832intcheckout_fast_forward(const struct object_id *from,1833const struct object_id *to,1834int overwrite_ignore);183518361837intsane_execvp(const char*file,char*const argv[]);18381839/*1840 * A struct to encapsulate the concept of whether a file has changed1841 * since we last checked it. This uses criteria similar to those used1842 * for the index.1843 */1844struct stat_validity {1845struct stat_data *sd;1846};18471848voidstat_validity_clear(struct stat_validity *sv);18491850/*1851 * Returns 1 if the path is a regular file (or a symlink to a regular1852 * file) and matches the saved stat_validity, 0 otherwise. A missing1853 * or inaccessible file is considered a match if the struct was just1854 * initialized, or if the previous update found an inaccessible file.1855 */1856intstat_validity_check(struct stat_validity *sv,const char*path);18571858/*1859 * Update the stat_validity from a file opened at descriptor fd. If1860 * the file is missing, inaccessible, or not a regular file, then1861 * future calls to stat_validity_check will match iff one of those1862 * conditions continues to be true.1863 */1864voidstat_validity_update(struct stat_validity *sv,int fd);18651866intversioncmp(const char*s1,const char*s2);1867voidsleep_millisec(int millisec);18681869/*1870 * Create a directory and (if share is nonzero) adjust its permissions1871 * according to the shared_repository setting. Only use this for1872 * directories under $GIT_DIR. Don't use it for working tree1873 * directories.1874 */1875voidsafe_create_dir(const char*dir,int share);18761877/*1878 * Should we print an ellipsis after an abbreviated SHA-1 value1879 * when doing diff-raw output or indicating a detached HEAD?1880 */1881externintprint_sha1_ellipsis(void);18821883#endif/* CACHE_H */