compat/mingw.h

   1 #ifdef __MINGW64_VERSION_MAJOR
   2 #include <stdint.h>
   3 #include <wchar.h>
   4 typedef _sigset_t sigset_t;
   5 #endif
   6 #include <winsock2.h>
   7 #include <ws2tcpip.h>
   8
   9 /* MinGW-w64 reports to have flockfile, but it does not actually have it. */
  10 #ifdef __MINGW64_VERSION_MAJOR
  11 #undef _POSIX_THREAD_SAFE_FUNCTIONS
  12 #endif
  13
  14 struct config_context;
  15 int mingw_core_config(const char *var, const char *value,
  16                       const struct config_context *ctx, void *cb);
  17 #define platform_core_config mingw_core_config
  18
  19 /*
  20  * things that are not available in header files
  21  */
  22
  23 typedef int uid_t;
  24 typedef int socklen_t;
  25 #ifndef __MINGW64_VERSION_MAJOR
  26 typedef int pid_t;
  27 #define hstrerror strerror
  28 #endif
  29
  30 #define S_IFLNK    0120000 /* Symbolic link */
  31 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
  32 #define S_ISSOCK(x) 0
  33
  34 #ifndef S_IRWXG
  35 #define S_IRGRP 0
  36 #define S_IWGRP 0
  37 #define S_IXGRP 0
  38 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
  39 #endif
  40 #ifndef S_IRWXO
  41 #define S_IROTH 0
  42 #define S_IWOTH 0
  43 #define S_IXOTH 0
  44 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
  45 #endif
  46
  47 #define S_ISUID 0004000
  48 #define S_ISGID 0002000
  49 #define S_ISVTX 0001000
  50
  51 #define WIFEXITED(x) 1
  52 #define WIFSIGNALED(x) 0
  53 #define WEXITSTATUS(x) ((x) & 0xff)
  54 #define WTERMSIG(x) SIGTERM
  55
  56 #ifndef EWOULDBLOCK
  57 #define EWOULDBLOCK EAGAIN
  58 #endif
  59 #ifndef ELOOP
  60 #define ELOOP EMLINK
  61 #endif
  62 #define SHUT_WR SD_SEND
  63
  64 #define SIGHUP 1
  65 #define SIGQUIT 3
  66 #define SIGKILL 9
  67 #define SIGPIPE 13
  68 #define SIGALRM 14
  69 #define SIGCHLD 17
  70
  71 #define F_GETFD 1
  72 #define F_SETFD 2
  73 #define FD_CLOEXEC 0x1
  74
  75 #if !defined O_CLOEXEC && defined O_NOINHERIT
  76 #define O_CLOEXEC       O_NOINHERIT
  77 #endif
  78
  79 #ifndef EAFNOSUPPORT
  80 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  81 #endif
  82 #ifndef ECONNABORTED
  83 #define ECONNABORTED WSAECONNABORTED
  84 #endif
  85 #ifndef ENOTSOCK
  86 #define ENOTSOCK WSAENOTSOCK
  87 #endif
  88
  89 struct passwd {
  90         char *pw_name;
  91         char *pw_gecos;
  92         char *pw_dir;
  93 };
  94
  95 typedef void (__cdecl *sig_handler_t)(int);
  96 struct sigaction {
  97         sig_handler_t sa_handler;
  98         unsigned sa_flags;
  99 };
 100 #define SA_RESTART 0
 101
 102 struct itimerval {
 103         struct timeval it_value, it_interval;
 104 };
 105 #define ITIMER_REAL 0
 106
 107 struct utsname {
 108         char sysname[16];
 109         char nodename[1];
 110         char release[16];
 111         char version[16];
 112         char machine[1];
 113 };
 114
 115 /*
 116  * sanitize preprocessor namespace polluted by Windows headers defining
 117  * macros which collide with git local versions
 118  */
 119 #undef HELP_COMMAND /* from winuser.h */
 120
 121 /*
 122  * trivial stubs
 123  */
 124
 125 static inline int readlink(const char *path UNUSED, char *buf UNUSED, size_t bufsiz UNUSED)
 126 { errno = ENOSYS; return -1; }
 127 static inline int symlink(const char *oldpath UNUSED, const char *newpath UNUSED)
 128 { errno = ENOSYS; return -1; }
 129 static inline int fchmod(int fildes UNUSED, mode_t mode UNUSED)
 130 { errno = ENOSYS; return -1; }
 131 #ifndef __MINGW64_VERSION_MAJOR
 132 static inline pid_t fork(void)
 133 { errno = ENOSYS; return -1; }
 134 #endif
 135 static inline unsigned int alarm(unsigned int seconds UNUSED)
 136 { return 0; }
 137 static inline int fsync(int fd)
 138 { return _commit(fd); }
 139 static inline void sync(void)
 140 {}
 141 static inline uid_t getuid(void)
 142 { return 1; }
 143 static inline struct passwd *getpwnam(const char *name UNUSED)
 144 { return NULL; }
 145 static inline int fcntl(int fd UNUSED, int cmd, ...)
 146 {
 147         if (cmd == F_GETFD || cmd == F_SETFD)
 148                 return 0;
 149         errno = EINVAL;
 150         return -1;
 151 }
 152
 153 #define sigemptyset(x) (void)0
 154 static inline int sigaddset(sigset_t *set UNUSED, int signum UNUSED)
 155 { return 0; }
 156 #define SIG_BLOCK 0
 157 #define SIG_UNBLOCK 0
 158 static inline int sigprocmask(int how UNUSED, const sigset_t *set UNUSED, sigset_t *oldset UNUSED)
 159 { return 0; }
 160 static inline pid_t getppid(void)
 161 { return 1; }
 162 static inline pid_t getpgid(pid_t pid)
 163 { return pid == 0 ? getpid() : pid; }
 164 static inline pid_t tcgetpgrp(int fd UNUSED)
 165 { return getpid(); }
 166
 167 /*
 168  * simple adaptors
 169  */
 170
 171 int mingw_mkdir(const char *path, int mode);
 172 #define mkdir mingw_mkdir
 173
 174 #define WNOHANG 1
 175 pid_t waitpid(pid_t pid, int *status, int options);
 176
 177 #define kill mingw_kill
 178 int mingw_kill(pid_t pid, int sig);
 179
 180 #define locate_in_PATH mingw_locate_in_PATH
 181 char *mingw_locate_in_PATH(const char *cmd);
 182
 183 #ifndef NO_OPENSSL
 184 #include <openssl/ssl.h>
 185 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 186 {
 187         return SSL_set_fd(ssl, _get_osfhandle(fd));
 188 }
 189 #define SSL_set_fd mingw_SSL_set_fd
 190
 191 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 192 {
 193         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 194 }
 195 #define SSL_set_rfd mingw_SSL_set_rfd
 196
 197 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 198 {
 199         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 200 }
 201 #define SSL_set_wfd mingw_SSL_set_wfd
 202 #endif
 203
 204 /*
 205  * implementations of missing functions
 206  */
 207
 208 int pipe(int filedes[2]);
 209 unsigned int sleep (unsigned int seconds);
 210 int mkstemp(char *template);
 211 int gettimeofday(struct timeval *tv, void *tz);
 212 #ifndef __MINGW64_VERSION_MAJOR
 213 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 214 struct tm *localtime_r(const time_t *timep, struct tm *result);
 215 #endif
 216 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 217 struct passwd *getpwuid(uid_t uid);
 218 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 219 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 220 int link(const char *oldpath, const char *newpath);
 221 int uname(struct utsname *buf);
 222
 223 /*
 224  * replacements of existing functions
 225  */
 226
 227 int mingw_unlink(const char *pathname);
 228 #define unlink mingw_unlink
 229
 230 int mingw_rmdir(const char *path);
 231 #define rmdir mingw_rmdir
 232
 233 int mingw_open (const char *filename, int oflags, ...);
 234 #define open mingw_open
 235 #undef OPEN_RETURNS_EINTR
 236
 237 int mingw_fgetc(FILE *stream);
 238 #define fgetc mingw_fgetc
 239
 240 FILE *mingw_fopen (const char *filename, const char *otype);
 241 #define fopen mingw_fopen
 242
 243 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 244 #define freopen mingw_freopen
 245
 246 int mingw_fflush(FILE *stream);
 247 #define fflush mingw_fflush
 248
 249 ssize_t mingw_write(int fd, const void *buf, size_t len);
 250 #define write mingw_write
 251
 252 int mingw_access(const char *filename, int mode);
 253 #undef access
 254 #define access mingw_access
 255
 256 int mingw_chdir(const char *dirname);
 257 #define chdir mingw_chdir
 258
 259 int mingw_chmod(const char *filename, int mode);
 260 #define chmod mingw_chmod
 261
 262 char *mingw_mktemp(char *template);
 263 #define mktemp mingw_mktemp
 264
 265 char *mingw_getcwd(char *pointer, int len);
 266 #define getcwd mingw_getcwd
 267
 268 #ifdef NO_UNSETENV
 269 #error "NO_UNSETENV is incompatible with the Windows-specific startup code!"
 270 #endif
 271
 272 /*
 273  * We bind *env() routines (even the mingw_ ones) to private mingw_ versions.
 274  * These talk to the CRT using UNICODE/wchar_t, but maintain the original
 275  * narrow-char API.
 276  *
 277  * Note that the MSCRT maintains both ANSI (getenv()) and UNICODE (_wgetenv())
 278  * routines and stores both versions of each environment variable in parallel
 279  * (and secretly updates both when you set one or the other), but it uses CP_ACP
 280  * to do the conversion rather than CP_UTF8.
 281  *
 282  * Since everything in the git code base is UTF8, we define the mingw_ routines
 283  * to access the CRT using the UNICODE routines and manually convert them to
 284  * UTF8.  This also avoids round-trip problems.
 285  *
 286  * This also helps with our linkage, since "_wenviron" is publicly exported
 287  * from the CRT.  But to access "_environ" we would have to statically link
 288  * to the CRT (/MT).
 289  *
 290  * We require NO_SETENV (and let gitsetenv() call our mingw_putenv).
 291  */
 292 #define getenv       mingw_getenv
 293 #define putenv       mingw_putenv
 294 #define unsetenv     mingw_putenv
 295 char *mingw_getenv(const char *name);
 296 int   mingw_putenv(const char *name);
 297
 298 int mingw_gethostname(char *host, int namelen);
 299 #define gethostname mingw_gethostname
 300
 301 struct hostent *mingw_gethostbyname(const char *host);
 302 #define gethostbyname mingw_gethostbyname
 303
 304 int mingw_getaddrinfo(const char *node, const char *service,
 305                       const struct addrinfo *hints, struct addrinfo **res);
 306 #define getaddrinfo mingw_getaddrinfo
 307
 308 int mingw_socket(int domain, int type, int protocol);
 309 #define socket mingw_socket
 310
 311 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 312 #define connect mingw_connect
 313
 314 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 315 #define bind mingw_bind
 316
 317 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 318 #define setsockopt mingw_setsockopt
 319
 320 int mingw_shutdown(int sockfd, int how);
 321 #define shutdown mingw_shutdown
 322
 323 int mingw_listen(int sockfd, int backlog);
 324 #define listen mingw_listen
 325
 326 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 327 #define accept mingw_accept
 328
 329 int mingw_rename(const char*, const char*);
 330 #define rename mingw_rename
 331
 332 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 333 int mingw_getpagesize(void);
 334 #define getpagesize mingw_getpagesize
 335 #endif
 336
 337 int win32_fsync_no_flush(int fd);
 338 #define fsync_no_flush win32_fsync_no_flush
 339
 340 #define FSYNC_COMPONENTS_PLATFORM_DEFAULT (FSYNC_COMPONENTS_DEFAULT | FSYNC_COMPONENT_LOOSE_OBJECT)
 341 #define FSYNC_METHOD_DEFAULT (FSYNC_METHOD_BATCH)
 342
 343 struct rlimit {
 344         unsigned int rlim_cur;
 345 };
 346 #define RLIMIT_NOFILE 0
 347
 348 static inline int getrlimit(int resource, struct rlimit *rlp)
 349 {
 350         if (resource != RLIMIT_NOFILE) {
 351                 errno = EINVAL;
 352                 return -1;
 353         }
 354
 355         rlp->rlim_cur = 2048;
 356         return 0;
 357 }
 358
 359 /*
 360  * Use mingw specific stat()/lstat()/fstat() implementations on Windows,
 361  * including our own struct stat with 64 bit st_size and nanosecond-precision
 362  * file times.
 363  */
 364 #ifndef __MINGW64_VERSION_MAJOR
 365 #define off_t off64_t
 366 #define lseek _lseeki64
 367 #ifndef _MSC_VER
 368 struct timespec {
 369         time_t tv_sec;
 370         long tv_nsec;
 371 };
 372 #endif
 373 #endif
 374
 375 struct mingw_stat {
 376     _dev_t st_dev;
 377     _ino_t st_ino;
 378     _mode_t st_mode;
 379     short st_nlink;
 380     short st_uid;
 381     short st_gid;
 382     _dev_t st_rdev;
 383     off64_t st_size;
 384     struct timespec st_atim;
 385     struct timespec st_mtim;
 386     struct timespec st_ctim;
 387 };
 388
 389 #define st_atime st_atim.tv_sec
 390 #define st_mtime st_mtim.tv_sec
 391 #define st_ctime st_ctim.tv_sec
 392
 393 #ifdef stat
 394 #undef stat
 395 #endif
 396 #define stat mingw_stat
 397 int mingw_lstat(const char *file_name, struct stat *buf);
 398 int mingw_stat(const char *file_name, struct stat *buf);
 399 int mingw_fstat(int fd, struct stat *buf);
 400 #ifdef fstat
 401 #undef fstat
 402 #endif
 403 #define fstat mingw_fstat
 404 #ifdef lstat
 405 #undef lstat
 406 #endif
 407 #define lstat mingw_lstat
 408
 409
 410 int mingw_utime(const char *file_name, const struct utimbuf *times);
 411 #define utime mingw_utime
 412 size_t mingw_strftime(char *s, size_t max,
 413                    const char *format, const struct tm *tm);
 414 #define strftime mingw_strftime
 415
 416 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 417                      const char *dir,
 418                      int fhin, int fhout, int fherr);
 419 int mingw_execvp(const char *cmd, char *const *argv);
 420 #define execvp mingw_execvp
 421 int mingw_execv(const char *cmd, char *const *argv);
 422 #define execv mingw_execv
 423
 424 static inline unsigned int git_ntohl(unsigned int x)
 425 { return (unsigned int)ntohl(x); }
 426 #define ntohl git_ntohl
 427
 428 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 429 #define signal mingw_signal
 430
 431 int mingw_raise(int sig);
 432 #define raise mingw_raise
 433
 434 /*
 435  * ANSI emulation wrappers
 436  */
 437
 438 int winansi_isatty(int fd);
 439 #define isatty winansi_isatty
 440
 441 int winansi_dup2(int oldfd, int newfd);
 442 #define dup2 winansi_dup2
 443
 444 void winansi_init(void);
 445 HANDLE winansi_get_osfhandle(int fd);
 446
 447 /*
 448  * git specific compatibility
 449  */
 450
 451 static inline void convert_slashes(char *path)
 452 {
 453         for (; *path; path++)
 454                 if (*path == '\\')
 455                         *path = '/';
 456 }
 457 #define PATH_SEP ';'
 458 char *mingw_query_user_email(void);
 459 #define query_user_email mingw_query_user_email
 460 #if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
 461 #define PRIuMAX "I64u"
 462 #define PRId64 "I64d"
 463 #else
 464 #include <inttypes.h>
 465 #endif
 466
 467 /**
 468  * Verifies that the specified path is owned by the user running the
 469  * current process.
 470  */
 471 int is_path_owned_by_current_sid(const char *path, struct strbuf *report);
 472 #define is_path_owned_by_current_user is_path_owned_by_current_sid
 473
 474 /**
 475  * Verifies that the given path is a valid one on Windows.
 476  *
 477  * In particular, path segments are disallowed which
 478  *
 479  * - end in a period or a space (except the special directories `.` and `..`).
 480  *
 481  * - contain any of the reserved characters, e.g. `:`, `;`, `*`, etc
 482  *
 483  * - correspond to reserved names (such as `AUX`, `PRN`, etc)
 484  *
 485  * The `allow_literal_nul` parameter controls whether the path `NUL` should
 486  * be considered valid (this makes sense e.g. before opening files, as it is
 487  * perfectly legitimate to open `NUL` on Windows, just as it is to open
 488  * `/dev/null` on Unix/Linux).
 489  *
 490  * Returns 1 upon success, otherwise 0.
 491  */
 492 int is_valid_win32_path(const char *path, int allow_literal_nul);
 493 #define is_valid_path(path) is_valid_win32_path(path, 0)
 494
 495 /**
 496  * Converts UTF-8 encoded string to UTF-16LE.
 497  *
 498  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 499  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 500  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 501  * Unicode) are converted to hex-code.
 502  *
 503  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 504  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 505  *
 506  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 507  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 508  *
 509  * The maximum space is needed only if the entire input string consists of
 510  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 511  *
 512  *               |                   | UTF-8 | UTF-16 |
 513  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 514  * --------------+-------------------+-------+--------+-------
 515  * 000000-00007f | 0-7f              |   1   |   1    |  1
 516  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 517  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 518  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 519  * invalid       | 80-9f             |   1   |  2 (b) |  2
 520  * invalid       | a0-ff             |   1   |   1    |  1
 521  *
 522  * (a) encoded as UTF-16 surrogate pair
 523  * (b) encoded as two hex digits
 524  *
 525  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 526  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 527  * encodes as only 4 UTF-8 bytes.
 528  *
 529  * Parameters:
 530  * wcs: wide char target buffer
 531  * utf: string to convert
 532  * wcslen: size of target buffer (in wchar_t's)
 533  * utflen: size of string to convert, or -1 if 0-terminated
 534  *
 535  * Returns:
 536  * length of converted string (_wcslen(wcs)), or -1 on failure
 537  *
 538  * Errors:
 539  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 540  * ERANGE: the output buffer is too small
 541  */
 542 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 543
 544 /**
 545  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 546  */
 547 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 548 {
 549         return xutftowcsn(wcs, utf, wcslen, -1);
 550 }
 551
 552 /**
 553  * Simplified file system specific variant of xutftowcsn, assumes output
 554  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 555  * fails with ENAMETOOLONG if input string is too long.
 556  */
 557 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 558 {
 559         int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
 560         if (result < 0 && errno == ERANGE)
 561                 errno = ENAMETOOLONG;
 562         return result;
 563 }
 564
 565 /**
 566  * Converts UTF-16LE encoded string to UTF-8.
 567  *
 568  * Maximum space requirement for the target buffer is three UTF-8 chars per
 569  * wide char ((_wcslen(wcs) * 3) + 1).
 570  *
 571  * The maximum space is needed only if the entire input string consists of
 572  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 573  * modulo surrogate pairs), as per the following table:
 574  *
 575  *               |                       | UTF-16 | UTF-8 |
 576  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 577  * --------------+-----------------------+--------+-------+-------
 578  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 579  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 580  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 581  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 582  *
 583  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 584  *
 585  * Parameters:
 586  * utf: target buffer
 587  * wcs: wide string to convert
 588  * utflen: size of target buffer
 589  *
 590  * Returns:
 591  * length of converted string, or -1 on failure
 592  *
 593  * Errors:
 594  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 595  * ERANGE: the output buffer is too small
 596  */
 597 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 598
 599 /*
 600  * A critical section used in the implementation of the spawn
 601  * functions (mingw_spawnv[p]e()) and waitpid(). Initialised in
 602  * the replacement main() macro below.
 603  */
 604 extern CRITICAL_SECTION pinfo_cs;
 605
 606 /*
 607  * Git, like most portable C applications, implements a main() function. On
 608  * Windows, this main() function would receive parameters encoded in the
 609  * current locale, but Git for Windows would prefer UTF-8 encoded  parameters.
 610  *
 611  * To make that happen, we still declare main() here, and then declare and
 612  * implement wmain() (which is the Unicode variant of main()) and compile with
 613  * -municode. This wmain() function reencodes the parameters from UTF-16 to
 614  * UTF-8 format, sets up a couple of other things as required on Windows, and
 615  * then hands off to the main() function.
 616  */
 617 int wmain(int argc, const wchar_t **w_argv);
 618 int main(int argc, const char **argv);
 619
 620 /*
 621  * For debugging: if a problem occurs, say, in a Git process that is spawned
 622  * from another Git process which in turn is spawned from yet another Git
 623  * process, it can be quite daunting to figure out what is going on.
 624  *
 625  * Call this function to open a new MinTTY (this assumes you are in Git for
 626  * Windows' SDK) with a GDB that attaches to the current process right away.
 627  */
 628 void open_in_gdb(void);
 629
 630 /*
 631  * Used by Pthread API implementation for Windows
 632  */
 633 int err_win_to_posix(DWORD winerr);
 634
 635 #ifndef NO_UNIX_SOCKETS
 636 int mingw_have_unix_sockets(void);
 637 #undef have_unix_sockets
 638 #define have_unix_sockets mingw_have_unix_sockets
 639 #endif