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 /*
  15  * things that are not available in header files
  16  */
  17
  18 typedef int uid_t;
  19 typedef int socklen_t;
  20 #ifndef __MINGW64_VERSION_MAJOR
  21 typedef int pid_t;
  22 #define hstrerror strerror
  23 #endif
  24
  25 #define S_IFLNK    0120000 /* Symbolic link */
  26 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
  27 #define S_ISSOCK(x) 0
  28
  29 #ifndef S_IRWXG
  30 #define S_IRGRP 0
  31 #define S_IWGRP 0
  32 #define S_IXGRP 0
  33 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
  34 #endif
  35 #ifndef S_IRWXO
  36 #define S_IROTH 0
  37 #define S_IWOTH 0
  38 #define S_IXOTH 0
  39 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
  40 #endif
  41
  42 #define S_ISUID 0004000
  43 #define S_ISGID 0002000
  44 #define S_ISVTX 0001000
  45
  46 #define WIFEXITED(x) 1
  47 #define WIFSIGNALED(x) 0
  48 #define WEXITSTATUS(x) ((x) & 0xff)
  49 #define WTERMSIG(x) SIGTERM
  50
  51 #ifndef EWOULDBLOCK
  52 #define EWOULDBLOCK EAGAIN
  53 #endif
  54 #ifndef ELOOP
  55 #define ELOOP EMLINK
  56 #endif
  57 #define SHUT_WR SD_SEND
  58
  59 #define SIGHUP 1
  60 #define SIGQUIT 3
  61 #define SIGKILL 9
  62 #define SIGPIPE 13
  63 #define SIGALRM 14
  64 #define SIGCHLD 17
  65
  66 #define F_GETFD 1
  67 #define F_SETFD 2
  68 #define FD_CLOEXEC 0x1
  69
  70 #if !defined O_CLOEXEC && defined O_NOINHERIT
  71 #define O_CLOEXEC       O_NOINHERIT
  72 #endif
  73
  74 #ifndef EAFNOSUPPORT
  75 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  76 #endif
  77 #ifndef ECONNABORTED
  78 #define ECONNABORTED WSAECONNABORTED
  79 #endif
  80 #ifndef ENOTSOCK
  81 #define ENOTSOCK WSAENOTSOCK
  82 #endif
  83
  84 struct passwd {
  85         char *pw_name;
  86         char *pw_gecos;
  87         char *pw_dir;
  88 };
  89
  90 typedef void (__cdecl *sig_handler_t)(int);
  91 struct sigaction {
  92         sig_handler_t sa_handler;
  93         unsigned sa_flags;
  94 };
  95 #define SA_RESTART 0
  96
  97 struct itimerval {
  98         struct timeval it_value, it_interval;
  99 };
 100 #define ITIMER_REAL 0
 101
 102 struct utsname {
 103         char sysname[16];
 104         char nodename[1];
 105         char release[16];
 106         char version[16];
 107         char machine[1];
 108 };
 109
 110 /*
 111  * sanitize preprocessor namespace polluted by Windows headers defining
 112  * macros which collide with git local versions
 113  */
 114 #undef HELP_COMMAND /* from winuser.h */
 115
 116 /*
 117  * trivial stubs
 118  */
 119
 120 static inline int readlink(const char *path, char *buf, size_t bufsiz)
 121 { errno = ENOSYS; return -1; }
 122 static inline int symlink(const char *oldpath, const char *newpath)
 123 { errno = ENOSYS; return -1; }
 124 static inline int fchmod(int fildes, mode_t mode)
 125 { errno = ENOSYS; return -1; }
 126 #ifndef __MINGW64_VERSION_MAJOR
 127 static inline pid_t fork(void)
 128 { errno = ENOSYS; return -1; }
 129 #endif
 130 static inline unsigned int alarm(unsigned int seconds)
 131 { return 0; }
 132 static inline int fsync(int fd)
 133 { return _commit(fd); }
 134 static inline void sync(void)
 135 {}
 136 static inline uid_t getuid(void)
 137 { return 1; }
 138 static inline struct passwd *getpwnam(const char *name)
 139 { return NULL; }
 140 static inline int fcntl(int fd, int cmd, ...)
 141 {
 142         if (cmd == F_GETFD || cmd == F_SETFD)
 143                 return 0;
 144         errno = EINVAL;
 145         return -1;
 146 }
 147 /* bash cannot reliably detect negative return codes as failure */
 148 #define exit(code) exit((code) & 0xff)
 149 #define sigemptyset(x) (void)0
 150 static inline int sigaddset(sigset_t *set, int signum)
 151 { return 0; }
 152 #define SIG_BLOCK 0
 153 #define SIG_UNBLOCK 0
 154 static inline int sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
 155 { return 0; }
 156 static inline pid_t getppid(void)
 157 { return 1; }
 158 static inline pid_t getpgid(pid_t pid)
 159 { return pid == 0 ? getpid() : pid; }
 160 static inline pid_t tcgetpgrp(int fd)
 161 { return getpid(); }
 162
 163 /*
 164  * simple adaptors
 165  */
 166
 167 int mingw_mkdir(const char *path, int mode);
 168 #define mkdir mingw_mkdir
 169
 170 #define WNOHANG 1
 171 pid_t waitpid(pid_t pid, int *status, int options);
 172
 173 #define kill mingw_kill
 174 int mingw_kill(pid_t pid, int sig);
 175
 176 #ifndef NO_OPENSSL
 177 #include <openssl/ssl.h>
 178 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 179 {
 180         return SSL_set_fd(ssl, _get_osfhandle(fd));
 181 }
 182 #define SSL_set_fd mingw_SSL_set_fd
 183
 184 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 185 {
 186         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 187 }
 188 #define SSL_set_rfd mingw_SSL_set_rfd
 189
 190 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 191 {
 192         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 193 }
 194 #define SSL_set_wfd mingw_SSL_set_wfd
 195 #endif
 196
 197 /*
 198  * implementations of missing functions
 199  */
 200
 201 int pipe(int filedes[2]);
 202 unsigned int sleep (unsigned int seconds);
 203 int mkstemp(char *template);
 204 int gettimeofday(struct timeval *tv, void *tz);
 205 #ifndef __MINGW64_VERSION_MAJOR
 206 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 207 struct tm *localtime_r(const time_t *timep, struct tm *result);
 208 #endif
 209 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 210 struct passwd *getpwuid(uid_t uid);
 211 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 212 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 213 int link(const char *oldpath, const char *newpath);
 214 int uname(struct utsname *buf);
 215
 216 /*
 217  * replacements of existing functions
 218  */
 219
 220 int mingw_unlink(const char *pathname);
 221 #define unlink mingw_unlink
 222
 223 int mingw_rmdir(const char *path);
 224 #define rmdir mingw_rmdir
 225
 226 int mingw_open (const char *filename, int oflags, ...);
 227 #define open mingw_open
 228
 229 int mingw_fgetc(FILE *stream);
 230 #define fgetc mingw_fgetc
 231
 232 FILE *mingw_fopen (const char *filename, const char *otype);
 233 #define fopen mingw_fopen
 234
 235 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 236 #define freopen mingw_freopen
 237
 238 int mingw_fflush(FILE *stream);
 239 #define fflush mingw_fflush
 240
 241 ssize_t mingw_write(int fd, const void *buf, size_t len);
 242 #define write mingw_write
 243
 244 int mingw_access(const char *filename, int mode);
 245 #undef access
 246 #define access mingw_access
 247
 248 int mingw_chdir(const char *dirname);
 249 #define chdir mingw_chdir
 250
 251 int mingw_chmod(const char *filename, int mode);
 252 #define chmod mingw_chmod
 253
 254 char *mingw_mktemp(char *template);
 255 #define mktemp mingw_mktemp
 256
 257 char *mingw_getcwd(char *pointer, int len);
 258 #define getcwd mingw_getcwd
 259
 260 char *mingw_getenv(const char *name);
 261 #define getenv mingw_getenv
 262 int mingw_putenv(const char *namevalue);
 263 #define putenv mingw_putenv
 264 #define unsetenv mingw_putenv
 265
 266 int mingw_gethostname(char *host, int namelen);
 267 #define gethostname mingw_gethostname
 268
 269 struct hostent *mingw_gethostbyname(const char *host);
 270 #define gethostbyname mingw_gethostbyname
 271
 272 void mingw_freeaddrinfo(struct addrinfo *res);
 273 #define freeaddrinfo mingw_freeaddrinfo
 274
 275 int mingw_getaddrinfo(const char *node, const char *service,
 276                       const struct addrinfo *hints, struct addrinfo **res);
 277 #define getaddrinfo mingw_getaddrinfo
 278
 279 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 280                       char *host, DWORD hostlen, char *serv, DWORD servlen,
 281                       int flags);
 282 #define getnameinfo mingw_getnameinfo
 283
 284 int mingw_socket(int domain, int type, int protocol);
 285 #define socket mingw_socket
 286
 287 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 288 #define connect mingw_connect
 289
 290 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 291 #define bind mingw_bind
 292
 293 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 294 #define setsockopt mingw_setsockopt
 295
 296 int mingw_shutdown(int sockfd, int how);
 297 #define shutdown mingw_shutdown
 298
 299 int mingw_listen(int sockfd, int backlog);
 300 #define listen mingw_listen
 301
 302 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 303 #define accept mingw_accept
 304
 305 int mingw_rename(const char*, const char*);
 306 #define rename mingw_rename
 307
 308 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 309 int mingw_getpagesize(void);
 310 #define getpagesize mingw_getpagesize
 311 #endif
 312
 313 struct rlimit {
 314         unsigned int rlim_cur;
 315 };
 316 #define RLIMIT_NOFILE 0
 317
 318 static inline int getrlimit(int resource, struct rlimit *rlp)
 319 {
 320         if (resource != RLIMIT_NOFILE) {
 321                 errno = EINVAL;
 322                 return -1;
 323         }
 324
 325         rlp->rlim_cur = 2048;
 326         return 0;
 327 }
 328
 329 /*
 330  * Use mingw specific stat()/lstat()/fstat() implementations on Windows.
 331  */
 332 #ifndef __MINGW64_VERSION_MAJOR
 333 #define off_t off64_t
 334 #define lseek _lseeki64
 335 #endif
 336
 337 /* use struct stat with 64 bit st_size */
 338 #ifdef stat
 339 #undef stat
 340 #endif
 341 #define stat _stati64
 342 int mingw_lstat(const char *file_name, struct stat *buf);
 343 int mingw_stat(const char *file_name, struct stat *buf);
 344 int mingw_fstat(int fd, struct stat *buf);
 345 #ifdef fstat
 346 #undef fstat
 347 #endif
 348 #define fstat mingw_fstat
 349 #ifdef lstat
 350 #undef lstat
 351 #endif
 352 #define lstat mingw_lstat
 353
 354 #ifndef _stati64
 355 # define _stati64(x,y) mingw_stat(x,y)
 356 #elif defined (_USE_32BIT_TIME_T)
 357 # define _stat32i64(x,y) mingw_stat(x,y)
 358 #else
 359 # define _stat64(x,y) mingw_stat(x,y)
 360 #endif
 361
 362 int mingw_utime(const char *file_name, const struct utimbuf *times);
 363 #define utime mingw_utime
 364 size_t mingw_strftime(char *s, size_t max,
 365                    const char *format, const struct tm *tm);
 366 #define strftime mingw_strftime
 367
 368 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 369                      const char *dir,
 370                      int fhin, int fhout, int fherr);
 371 int mingw_execvp(const char *cmd, char *const *argv);
 372 #define execvp mingw_execvp
 373 int mingw_execv(const char *cmd, char *const *argv);
 374 #define execv mingw_execv
 375
 376 static inline unsigned int git_ntohl(unsigned int x)
 377 { return (unsigned int)ntohl(x); }
 378 #define ntohl git_ntohl
 379
 380 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 381 #define signal mingw_signal
 382
 383 int mingw_raise(int sig);
 384 #define raise mingw_raise
 385
 386 /*
 387  * ANSI emulation wrappers
 388  */
 389
 390 int winansi_isatty(int fd);
 391 #define isatty winansi_isatty
 392
 393 void winansi_init(void);
 394 HANDLE winansi_get_osfhandle(int fd);
 395
 396 /*
 397  * git specific compatibility
 398  */
 399
 400 static inline void convert_slashes(char *path)
 401 {
 402         for (; *path; path++)
 403                 if (*path == '\\')
 404                         *path = '/';
 405 }
 406 #define PATH_SEP ';'
 407 #if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
 408 #define PRIuMAX "I64u"
 409 #define PRId64 "I64d"
 410 #else
 411 #include <inttypes.h>
 412 #endif
 413
 414 /**
 415  * Converts UTF-8 encoded string to UTF-16LE.
 416  *
 417  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 418  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 419  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 420  * Unicode) are converted to hex-code.
 421  *
 422  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 423  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 424  *
 425  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 426  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 427  *
 428  * The maximum space is needed only if the entire input string consists of
 429  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 430  *
 431  *               |                   | UTF-8 | UTF-16 |
 432  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 433  * --------------+-------------------+-------+--------+-------
 434  * 000000-00007f | 0-7f              |   1   |   1    |  1
 435  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 436  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 437  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 438  * invalid       | 80-9f             |   1   |  2 (b) |  2
 439  * invalid       | a0-ff             |   1   |   1    |  1
 440  *
 441  * (a) encoded as UTF-16 surrogate pair
 442  * (b) encoded as two hex digits
 443  *
 444  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 445  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 446  * encodes as only 4 UTF-8 bytes.
 447  *
 448  * Parameters:
 449  * wcs: wide char target buffer
 450  * utf: string to convert
 451  * wcslen: size of target buffer (in wchar_t's)
 452  * utflen: size of string to convert, or -1 if 0-terminated
 453  *
 454  * Returns:
 455  * length of converted string (_wcslen(wcs)), or -1 on failure
 456  *
 457  * Errors:
 458  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 459  * ERANGE: the output buffer is too small
 460  */
 461 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 462
 463 /**
 464  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 465  */
 466 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 467 {
 468         return xutftowcsn(wcs, utf, wcslen, -1);
 469 }
 470
 471 /**
 472  * Simplified file system specific variant of xutftowcsn, assumes output
 473  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 474  * fails with ENAMETOOLONG if input string is too long.
 475  */
 476 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 477 {
 478         int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
 479         if (result < 0 && errno == ERANGE)
 480                 errno = ENAMETOOLONG;
 481         return result;
 482 }
 483
 484 /**
 485  * Converts UTF-16LE encoded string to UTF-8.
 486  *
 487  * Maximum space requirement for the target buffer is three UTF-8 chars per
 488  * wide char ((_wcslen(wcs) * 3) + 1).
 489  *
 490  * The maximum space is needed only if the entire input string consists of
 491  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 492  * modulo surrogate pairs), as per the following table:
 493  *
 494  *               |                       | UTF-16 | UTF-8 |
 495  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 496  * --------------+-----------------------+--------+-------+-------
 497  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 498  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 499  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 500  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 501  *
 502  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 503  *
 504  * Parameters:
 505  * utf: target buffer
 506  * wcs: wide string to convert
 507  * utflen: size of target buffer
 508  *
 509  * Returns:
 510  * length of converted string, or -1 on failure
 511  *
 512  * Errors:
 513  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 514  * ERANGE: the output buffer is too small
 515  */
 516 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 517
 518 /*
 519  * A critical section used in the implementation of the spawn
 520  * functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
 521  * the replacement main() macro below.
 522  */
 523 extern CRITICAL_SECTION pinfo_cs;
 524
 525 /*
 526  * A replacement of main() that adds win32 specific initialization.
 527  */
 528
 529 void mingw_startup(void);
 530 #define main(c,v) dummy_decl_mingw_main(void); \
 531 static int mingw_main(c,v); \
 532 int main(int argc, const char **argv) \
 533 { \
 534         mingw_startup(); \
 535         return mingw_main(__argc, (void *)__argv); \
 536 } \
 537 static int mingw_main(c,v)
 538
 539 /*
 540  * Used by Pthread API implementation for Windows
 541  */
 542 extern int err_win_to_posix(DWORD winerr);