compat/mingw.h

   1 #include <winsock2.h>
   2 #include <ws2tcpip.h>
   3
   4 /*
   5  * things that are not available in header files
   6  */
   7
   8 typedef int pid_t;
   9 typedef int uid_t;
  10 typedef int socklen_t;
  11 #define hstrerror strerror
  12
  13 #define S_IFLNK    0120000 /* Symbolic link */
  14 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
  15 #define S_ISSOCK(x) 0
  16
  17 #define S_IRGRP 0
  18 #define S_IWGRP 0
  19 #define S_IXGRP 0
  20 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
  21 #define S_IROTH 0
  22 #define S_IWOTH 0
  23 #define S_IXOTH 0
  24 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
  25
  26 #define S_ISUID 0004000
  27 #define S_ISGID 0002000
  28 #define S_ISVTX 0001000
  29
  30 #define WIFEXITED(x) 1
  31 #define WIFSIGNALED(x) 0
  32 #define WEXITSTATUS(x) ((x) & 0xff)
  33 #define WTERMSIG(x) SIGTERM
  34
  35 #ifndef EWOULDBLOCK
  36 #define EWOULDBLOCK EAGAIN
  37 #endif
  38 #define SHUT_WR SD_SEND
  39
  40 #define SIGHUP 1
  41 #define SIGQUIT 3
  42 #define SIGKILL 9
  43 #define SIGPIPE 13
  44 #define SIGALRM 14
  45 #define SIGCHLD 17
  46
  47 #define F_GETFD 1
  48 #define F_SETFD 2
  49 #define FD_CLOEXEC 0x1
  50
  51 #ifndef EAFNOSUPPORT
  52 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  53 #endif
  54 #ifndef ECONNABORTED
  55 #define ECONNABORTED WSAECONNABORTED
  56 #endif
  57
  58 struct passwd {
  59         char *pw_name;
  60         char *pw_gecos;
  61         char *pw_dir;
  62 };
  63
  64 typedef void (__cdecl *sig_handler_t)(int);
  65 struct sigaction {
  66         sig_handler_t sa_handler;
  67         unsigned sa_flags;
  68 };
  69 #define sigemptyset(x) (void)0
  70 #define SA_RESTART 0
  71
  72 struct itimerval {
  73         struct timeval it_value, it_interval;
  74 };
  75 #define ITIMER_REAL 0
  76
  77 /*
  78  * sanitize preprocessor namespace polluted by Windows headers defining
  79  * macros which collide with git local versions
  80  */
  81 #undef HELP_COMMAND /* from winuser.h */
  82
  83 /*
  84  * trivial stubs
  85  */
  86
  87 static inline int readlink(const char *path, char *buf, size_t bufsiz)
  88 { errno = ENOSYS; return -1; }
  89 static inline int symlink(const char *oldpath, const char *newpath)
  90 { errno = ENOSYS; return -1; }
  91 static inline int fchmod(int fildes, mode_t mode)
  92 { errno = ENOSYS; return -1; }
  93 static inline pid_t fork(void)
  94 { errno = ENOSYS; return -1; }
  95 static inline unsigned int alarm(unsigned int seconds)
  96 { return 0; }
  97 static inline int fsync(int fd)
  98 { return _commit(fd); }
  99 static inline pid_t getppid(void)
 100 { return 1; }
 101 static inline void sync(void)
 102 {}
 103 static inline uid_t getuid(void)
 104 { return 1; }
 105 static inline struct passwd *getpwnam(const char *name)
 106 { return NULL; }
 107 static inline int fcntl(int fd, int cmd, ...)
 108 {
 109         if (cmd == F_GETFD || cmd == F_SETFD)
 110                 return 0;
 111         errno = EINVAL;
 112         return -1;
 113 }
 114 /* bash cannot reliably detect negative return codes as failure */
 115 #define exit(code) exit((code) & 0xff)
 116
 117 /*
 118  * simple adaptors
 119  */
 120
 121 int mingw_mkdir(const char *path, int mode);
 122 #define mkdir mingw_mkdir
 123
 124 #define WNOHANG 1
 125 pid_t waitpid(pid_t pid, int *status, int options);
 126
 127 #define kill mingw_kill
 128 int mingw_kill(pid_t pid, int sig);
 129
 130 #ifndef NO_OPENSSL
 131 #include <openssl/ssl.h>
 132 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 133 {
 134         return SSL_set_fd(ssl, _get_osfhandle(fd));
 135 }
 136 #define SSL_set_fd mingw_SSL_set_fd
 137
 138 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 139 {
 140         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 141 }
 142 #define SSL_set_rfd mingw_SSL_set_rfd
 143
 144 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 145 {
 146         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 147 }
 148 #define SSL_set_wfd mingw_SSL_set_wfd
 149 #endif
 150
 151 /*
 152  * implementations of missing functions
 153  */
 154
 155 int pipe(int filedes[2]);
 156 unsigned int sleep (unsigned int seconds);
 157 int mkstemp(char *template);
 158 int gettimeofday(struct timeval *tv, void *tz);
 159 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 160 struct tm *localtime_r(const time_t *timep, struct tm *result);
 161 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 162 struct passwd *getpwuid(uid_t uid);
 163 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 164 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 165 int link(const char *oldpath, const char *newpath);
 166
 167 /*
 168  * replacements of existing functions
 169  */
 170
 171 int mingw_unlink(const char *pathname);
 172 #define unlink mingw_unlink
 173
 174 int mingw_rmdir(const char *path);
 175 #define rmdir mingw_rmdir
 176
 177 int mingw_open (const char *filename, int oflags, ...);
 178 #define open mingw_open
 179
 180 int mingw_fgetc(FILE *stream);
 181 #define fgetc mingw_fgetc
 182
 183 FILE *mingw_fopen (const char *filename, const char *otype);
 184 #define fopen mingw_fopen
 185
 186 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 187 #define freopen mingw_freopen
 188
 189 int mingw_fflush(FILE *stream);
 190 #define fflush mingw_fflush
 191
 192 int mingw_access(const char *filename, int mode);
 193 #undef access
 194 #define access mingw_access
 195
 196 int mingw_chdir(const char *dirname);
 197 #define chdir mingw_chdir
 198
 199 int mingw_chmod(const char *filename, int mode);
 200 #define chmod mingw_chmod
 201
 202 char *mingw_mktemp(char *template);
 203 #define mktemp mingw_mktemp
 204
 205 char *mingw_getcwd(char *pointer, int len);
 206 #define getcwd mingw_getcwd
 207
 208 char *mingw_getenv(const char *name);
 209 #define getenv mingw_getenv
 210 int mingw_putenv(const char *namevalue);
 211 #define putenv mingw_putenv
 212 #define unsetenv mingw_putenv
 213
 214 int mingw_gethostname(char *host, int namelen);
 215 #define gethostname mingw_gethostname
 216
 217 struct hostent *mingw_gethostbyname(const char *host);
 218 #define gethostbyname mingw_gethostbyname
 219
 220 void mingw_freeaddrinfo(struct addrinfo *res);
 221 #define freeaddrinfo mingw_freeaddrinfo
 222
 223 int mingw_getaddrinfo(const char *node, const char *service,
 224                       const struct addrinfo *hints, struct addrinfo **res);
 225 #define getaddrinfo mingw_getaddrinfo
 226
 227 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 228                       char *host, DWORD hostlen, char *serv, DWORD servlen,
 229                       int flags);
 230 #define getnameinfo mingw_getnameinfo
 231
 232 int mingw_socket(int domain, int type, int protocol);
 233 #define socket mingw_socket
 234
 235 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 236 #define connect mingw_connect
 237
 238 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 239 #define bind mingw_bind
 240
 241 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 242 #define setsockopt mingw_setsockopt
 243
 244 int mingw_shutdown(int sockfd, int how);
 245 #define shutdown mingw_shutdown
 246
 247 int mingw_listen(int sockfd, int backlog);
 248 #define listen mingw_listen
 249
 250 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 251 #define accept mingw_accept
 252
 253 int mingw_rename(const char*, const char*);
 254 #define rename mingw_rename
 255
 256 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 257 int mingw_getpagesize(void);
 258 #define getpagesize mingw_getpagesize
 259 #endif
 260
 261 struct rlimit {
 262         unsigned int rlim_cur;
 263 };
 264 #define RLIMIT_NOFILE 0
 265
 266 static inline int getrlimit(int resource, struct rlimit *rlp)
 267 {
 268         if (resource != RLIMIT_NOFILE) {
 269                 errno = EINVAL;
 270                 return -1;
 271         }
 272
 273         rlp->rlim_cur = 2048;
 274         return 0;
 275 }
 276
 277 /*
 278  * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
 279  * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
 280  */
 281 static inline long long filetime_to_hnsec(const FILETIME *ft)
 282 {
 283         long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
 284         /* Windows to Unix Epoch conversion */
 285         return winTime - 116444736000000000LL;
 286 }
 287
 288 static inline time_t filetime_to_time_t(const FILETIME *ft)
 289 {
 290         return (time_t)(filetime_to_hnsec(ft) / 10000000);
 291 }
 292
 293 /*
 294  * Use mingw specific stat()/lstat()/fstat() implementations on Windows.
 295  */
 296 #define off_t off64_t
 297 #define lseek _lseeki64
 298
 299 /* use struct stat with 64 bit st_size */
 300 #ifdef stat
 301 #undef stat
 302 #endif
 303 #define stat _stati64
 304 int mingw_lstat(const char *file_name, struct stat *buf);
 305 int mingw_stat(const char *file_name, struct stat *buf);
 306 int mingw_fstat(int fd, struct stat *buf);
 307 #ifdef fstat
 308 #undef fstat
 309 #endif
 310 #define fstat mingw_fstat
 311 #ifdef lstat
 312 #undef lstat
 313 #endif
 314 extern int (*lstat)(const char *file_name, struct stat *buf);
 315
 316 #ifndef _stati64
 317 # define _stati64(x,y) mingw_stat(x,y)
 318 #elif defined (_USE_32BIT_TIME_T)
 319 # define _stat32i64(x,y) mingw_stat(x,y)
 320 #else
 321 # define _stat64(x,y) mingw_stat(x,y)
 322 #endif
 323
 324 int mingw_utime(const char *file_name, const struct utimbuf *times);
 325 #define utime mingw_utime
 326
 327 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 328                      const char *dir,
 329                      int fhin, int fhout, int fherr);
 330 int mingw_execvp(const char *cmd, char *const *argv);
 331 #define execvp mingw_execvp
 332 int mingw_execv(const char *cmd, char *const *argv);
 333 #define execv mingw_execv
 334
 335 static inline unsigned int git_ntohl(unsigned int x)
 336 { return (unsigned int)ntohl(x); }
 337 #define ntohl git_ntohl
 338
 339 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 340 #define signal mingw_signal
 341
 342 int mingw_raise(int sig);
 343 #define raise mingw_raise
 344
 345 /*
 346  * ANSI emulation wrappers
 347  */
 348
 349 void winansi_init(void);
 350 HANDLE winansi_get_osfhandle(int fd);
 351
 352 /*
 353  * git specific compatibility
 354  */
 355
 356 #define has_dos_drive_prefix(path) (isalpha(*(path)) && (path)[1] == ':')
 357 #define is_dir_sep(c) ((c) == '/' || (c) == '\\')
 358 static inline char *mingw_find_last_dir_sep(const char *path)
 359 {
 360         char *ret = NULL;
 361         for (; *path; ++path)
 362                 if (is_dir_sep(*path))
 363                         ret = (char *)path;
 364         return ret;
 365 }
 366 #define find_last_dir_sep mingw_find_last_dir_sep
 367 int mingw_offset_1st_component(const char *path);
 368 #define offset_1st_component mingw_offset_1st_component
 369 #define PATH_SEP ';'
 370 #define PRIuMAX "I64u"
 371 #define PRId64 "I64d"
 372
 373 void mingw_open_html(const char *path);
 374 #define open_html mingw_open_html
 375
 376 void mingw_mark_as_git_dir(const char *dir);
 377 #define mark_as_git_dir mingw_mark_as_git_dir
 378
 379 /**
 380  * Max length of long paths (exceeding MAX_PATH). The actual maximum supported
 381  * by NTFS is 32,767 (* sizeof(wchar_t)), but we choose an arbitrary smaller
 382  * value to limit required stack memory.
 383  */
 384 #define MAX_LONG_PATH 4096
 385
 386 /**
 387  * Handles paths that would exceed the MAX_PATH limit of Windows Unicode APIs.
 388  *
 389  * With expand == false, the function checks for over-long paths and fails
 390  * with ENAMETOOLONG. The path parameter is not modified, except if cwd + path
 391  * exceeds max_path, but the resulting absolute path doesn't (e.g. due to
 392  * eliminating '..' components). The path parameter must point to a buffer
 393  * of max_path wide characters.
 394  *
 395  * With expand == true, an over-long path is automatically converted in place
 396  * to an absolute path prefixed with '\\?\', and the new length is returned.
 397  * The path parameter must point to a buffer of MAX_LONG_PATH wide characters.
 398  *
 399  * Parameters:
 400  * path: path to check and / or convert
 401  * len: size of path on input (number of wide chars without \0)
 402  * max_path: max short path length to check (usually MAX_PATH = 260, but just
 403  * 248 for CreateDirectoryW)
 404  * expand: false to only check the length, true to expand the path to a
 405  * '\\?\'-prefixed absolute path
 406  *
 407  * Return:
 408  * length of the resulting path, or -1 on failure
 409  *
 410  * Errors:
 411  * ENAMETOOLONG if path is too long
 412  */
 413 int handle_long_path(wchar_t *path, int len, int max_path, int expand);
 414
 415 /**
 416  * Converts UTF-8 encoded string to UTF-16LE.
 417  *
 418  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 419  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 420  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 421  * Unicode) are converted to hex-code.
 422  *
 423  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 424  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 425  *
 426  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 427  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 428  *
 429  * The maximum space is needed only if the entire input string consists of
 430  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 431  *
 432  *               |                   | UTF-8 | UTF-16 |
 433  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 434  * --------------+-------------------+-------+--------+-------
 435  * 000000-00007f | 0-7f              |   1   |   1    |  1
 436  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 437  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 438  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 439  * invalid       | 80-9f             |   1   |  2 (b) |  2
 440  * invalid       | a0-ff             |   1   |   1    |  1
 441  *
 442  * (a) encoded as UTF-16 surrogate pair
 443  * (b) encoded as two hex digits
 444  *
 445  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 446  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 447  * encodes as only 4 UTF-8 bytes.
 448  *
 449  * Parameters:
 450  * wcs: wide char target buffer
 451  * utf: string to convert
 452  * wcslen: size of target buffer (in wchar_t's)
 453  * utflen: size of string to convert, or -1 if 0-terminated
 454  *
 455  * Returns:
 456  * length of converted string (_wcslen(wcs)), or -1 on failure
 457  *
 458  * Errors:
 459  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 460  * ERANGE: the output buffer is too small
 461  */
 462 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 463
 464 /**
 465  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 466  */
 467 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 468 {
 469         return xutftowcsn(wcs, utf, wcslen, -1);
 470 }
 471
 472 /**
 473  * Simplified file system specific wrapper of xutftowcsn and handle_long_path.
 474  * Converts ERANGE to ENAMETOOLONG. If expand is true, wcs must be at least
 475  * MAX_LONG_PATH wide chars (see handle_long_path).
 476  */
 477 static inline int xutftowcs_path_ex(wchar_t *wcs, const char *utf,
 478                 size_t wcslen, int utflen, int max_path, int expand)
 479 {
 480         int result = xutftowcsn(wcs, utf, wcslen, utflen);
 481         if (result < 0 && errno == ERANGE)
 482                 errno = ENAMETOOLONG;
 483         if (result >= 0)
 484                 result = handle_long_path(wcs, result, max_path, expand);
 485         return result;
 486 }
 487
 488 /**
 489  * Simplified file system specific variant of xutftowcsn, assumes output
 490  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 491  * fails with ENAMETOOLONG if input string is too long. Typically used for
 492  * Windows APIs that don't support long paths, e.g. SetCurrentDirectory,
 493  * LoadLibrary, CreateProcess...
 494  */
 495 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 496 {
 497         return xutftowcs_path_ex(wcs, utf, MAX_PATH, -1, MAX_PATH, 0);
 498 }
 499
 500 /* need to re-declare that here as mingw.h is included before cache.h */
 501 extern int core_long_paths;
 502
 503 /**
 504  * Simplified file system specific variant of xutftowcsn for Windows APIs
 505  * that support long paths via '\\?\'-prefix, assumes output buffer size is
 506  * MAX_LONG_PATH wide chars, fails with ENAMETOOLONG if input string is too
 507  * long. The 'core.longpaths' git-config option controls whether the path
 508  * is only checked or expanded to a long path.
 509  */
 510 static inline int xutftowcs_long_path(wchar_t *wcs, const char *utf)
 511 {
 512         return xutftowcs_path_ex(wcs, utf, MAX_LONG_PATH, -1, MAX_PATH,
 513                         core_long_paths);
 514 }
 515
 516 /**
 517  * Converts UTF-16LE encoded string to UTF-8.
 518  *
 519  * Maximum space requirement for the target buffer is three UTF-8 chars per
 520  * wide char ((_wcslen(wcs) * 3) + 1).
 521  *
 522  * The maximum space is needed only if the entire input string consists of
 523  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 524  * modulo surrogate pairs), as per the following table:
 525  *
 526  *               |                       | UTF-16 | UTF-8 |
 527  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 528  * --------------+-----------------------+--------+-------+-------
 529  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 530  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 531  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 532  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 533  *
 534  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 535  *
 536  * Parameters:
 537  * utf: target buffer
 538  * wcs: wide string to convert
 539  * utflen: size of target buffer
 540  *
 541  * Returns:
 542  * length of converted string, or -1 on failure
 543  *
 544  * Errors:
 545  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 546  * ERANGE: the output buffer is too small
 547  */
 548 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 549
 550 /*
 551  * A critical section used in the implementation of the spawn
 552  * functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
 553  * the replacement main() macro below.
 554  */
 555 extern CRITICAL_SECTION pinfo_cs;
 556
 557 /*
 558  * A replacement of main() that adds win32 specific initialization.
 559  */
 560
 561 void mingw_startup();
 562 #define main(c,v) dummy_decl_mingw_main(); \
 563 static int mingw_main(c,v); \
 564 int main(c,v) \
 565 { \
 566         mingw_startup(); \
 567         return mingw_main(__argc, __argv); \
 568 } \
 569 static int mingw_main(c,v)
 570
 571 /*
 572  * Used by Pthread API implementation for Windows
 573  */
 574 extern int err_win_to_posix(DWORD winerr);
 575
 576 extern const char *get_windows_home_directory();
 577 #define get_home_directory() get_windows_home_directory()