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 #ifndef EAFNOSUPPORT
  71 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  72 #endif
  73 #ifndef ECONNABORTED
  74 #define ECONNABORTED WSAECONNABORTED
  75 #endif
  76 #ifndef ENOTSOCK
  77 #define ENOTSOCK WSAENOTSOCK
  78 #endif
  79
  80 struct passwd {
  81         char *pw_name;
  82         char *pw_gecos;
  83         char *pw_dir;
  84 };
  85
  86 typedef void (__cdecl *sig_handler_t)(int);
  87 struct sigaction {
  88         sig_handler_t sa_handler;
  89         unsigned sa_flags;
  90 };
  91 #define SA_RESTART 0
  92
  93 struct itimerval {
  94         struct timeval it_value, it_interval;
  95 };
  96 #define ITIMER_REAL 0
  97
  98 struct utsname {
  99         char sysname[16];
 100         char nodename[1];
 101         char release[16];
 102         char version[16];
 103         char machine[1];
 104 };
 105
 106 /*
 107  * sanitize preprocessor namespace polluted by Windows headers defining
 108  * macros which collide with git local versions
 109  */
 110 #undef HELP_COMMAND /* from winuser.h */
 111
 112 /*
 113  * trivial stubs
 114  */
 115
 116 static inline int readlink(const char *path, char *buf, size_t bufsiz)
 117 { errno = ENOSYS; return -1; }
 118 static inline int symlink(const char *oldpath, const char *newpath)
 119 { errno = ENOSYS; return -1; }
 120 static inline int fchmod(int fildes, mode_t mode)
 121 { errno = ENOSYS; return -1; }
 122 #ifndef __MINGW64_VERSION_MAJOR
 123 static inline pid_t fork(void)
 124 { errno = ENOSYS; return -1; }
 125 #endif
 126 static inline unsigned int alarm(unsigned int seconds)
 127 { return 0; }
 128 static inline int fsync(int fd)
 129 { return _commit(fd); }
 130 static inline void sync(void)
 131 {}
 132 static inline uid_t getuid(void)
 133 { return 1; }
 134 static inline struct passwd *getpwnam(const char *name)
 135 { return NULL; }
 136 static inline int fcntl(int fd, int cmd, ...)
 137 {
 138         if (cmd == F_GETFD || cmd == F_SETFD)
 139                 return 0;
 140         errno = EINVAL;
 141         return -1;
 142 }
 143 /* bash cannot reliably detect negative return codes as failure */
 144 #define exit(code) exit((code) & 0xff)
 145 #define sigemptyset(x) (void)0
 146 static inline int sigaddset(sigset_t *set, int signum)
 147 { return 0; }
 148 #define SIG_BLOCK 0
 149 #define SIG_UNBLOCK 0
 150 static inline int sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
 151 { return 0; }
 152 static inline pid_t getppid(void)
 153 { return 1; }
 154 static inline pid_t getpgid(pid_t pid)
 155 { return pid == 0 ? getpid() : pid; }
 156 static inline pid_t tcgetpgrp(int fd)
 157 { return getpid(); }
 158
 159 /*
 160  * simple adaptors
 161  */
 162
 163 int mingw_mkdir(const char *path, int mode);
 164 #define mkdir mingw_mkdir
 165
 166 #define WNOHANG 1
 167 pid_t waitpid(pid_t pid, int *status, int options);
 168
 169 #define kill mingw_kill
 170 int mingw_kill(pid_t pid, int sig);
 171
 172 #ifndef NO_OPENSSL
 173 #include <openssl/ssl.h>
 174 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 175 {
 176         return SSL_set_fd(ssl, _get_osfhandle(fd));
 177 }
 178 #define SSL_set_fd mingw_SSL_set_fd
 179
 180 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 181 {
 182         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 183 }
 184 #define SSL_set_rfd mingw_SSL_set_rfd
 185
 186 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 187 {
 188         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 189 }
 190 #define SSL_set_wfd mingw_SSL_set_wfd
 191 #endif
 192
 193 /*
 194  * implementations of missing functions
 195  */
 196
 197 int pipe(int filedes[2]);
 198 unsigned int sleep (unsigned int seconds);
 199 int mkstemp(char *template);
 200 int gettimeofday(struct timeval *tv, void *tz);
 201 #ifndef __MINGW64_VERSION_MAJOR
 202 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 203 struct tm *localtime_r(const time_t *timep, struct tm *result);
 204 #endif
 205 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 206 struct passwd *getpwuid(uid_t uid);
 207 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 208 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 209 int link(const char *oldpath, const char *newpath);
 210 int uname(struct utsname *buf);
 211
 212 /*
 213  * replacements of existing functions
 214  */
 215
 216 int mingw_unlink(const char *pathname);
 217 #define unlink mingw_unlink
 218
 219 int mingw_rmdir(const char *path);
 220 #define rmdir mingw_rmdir
 221
 222 int mingw_open (const char *filename, int oflags, ...);
 223 #define open mingw_open
 224
 225 int mingw_fgetc(FILE *stream);
 226 #define fgetc mingw_fgetc
 227
 228 FILE *mingw_fopen (const char *filename, const char *otype);
 229 #define fopen mingw_fopen
 230
 231 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 232 #define freopen mingw_freopen
 233
 234 int mingw_fflush(FILE *stream);
 235 #define fflush mingw_fflush
 236
 237 ssize_t mingw_write(int fd, const void *buf, size_t len);
 238 #define write mingw_write
 239
 240 int mingw_access(const char *filename, int mode);
 241 #undef access
 242 #define access mingw_access
 243
 244 int mingw_chdir(const char *dirname);
 245 #define chdir mingw_chdir
 246
 247 int mingw_chmod(const char *filename, int mode);
 248 #define chmod mingw_chmod
 249
 250 char *mingw_mktemp(char *template);
 251 #define mktemp mingw_mktemp
 252
 253 char *mingw_getcwd(char *pointer, int len);
 254 #define getcwd mingw_getcwd
 255
 256 char *mingw_getenv(const char *name);
 257 #define getenv mingw_getenv
 258 int mingw_putenv(const char *namevalue);
 259 #define putenv mingw_putenv
 260 #define unsetenv mingw_putenv
 261
 262 int mingw_gethostname(char *host, int namelen);
 263 #define gethostname mingw_gethostname
 264
 265 struct hostent *mingw_gethostbyname(const char *host);
 266 #define gethostbyname mingw_gethostbyname
 267
 268 void mingw_freeaddrinfo(struct addrinfo *res);
 269 #define freeaddrinfo mingw_freeaddrinfo
 270
 271 int mingw_getaddrinfo(const char *node, const char *service,
 272                       const struct addrinfo *hints, struct addrinfo **res);
 273 #define getaddrinfo mingw_getaddrinfo
 274
 275 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 276                       char *host, DWORD hostlen, char *serv, DWORD servlen,
 277                       int flags);
 278 #define getnameinfo mingw_getnameinfo
 279
 280 int mingw_socket(int domain, int type, int protocol);
 281 #define socket mingw_socket
 282
 283 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 284 #define connect mingw_connect
 285
 286 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 287 #define bind mingw_bind
 288
 289 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 290 #define setsockopt mingw_setsockopt
 291
 292 int mingw_shutdown(int sockfd, int how);
 293 #define shutdown mingw_shutdown
 294
 295 int mingw_listen(int sockfd, int backlog);
 296 #define listen mingw_listen
 297
 298 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 299 #define accept mingw_accept
 300
 301 int mingw_rename(const char*, const char*);
 302 #define rename mingw_rename
 303
 304 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 305 int mingw_getpagesize(void);
 306 #define getpagesize mingw_getpagesize
 307 #endif
 308
 309 struct rlimit {
 310         unsigned int rlim_cur;
 311 };
 312 #define RLIMIT_NOFILE 0
 313
 314 static inline int getrlimit(int resource, struct rlimit *rlp)
 315 {
 316         if (resource != RLIMIT_NOFILE) {
 317                 errno = EINVAL;
 318                 return -1;
 319         }
 320
 321         rlp->rlim_cur = 2048;
 322         return 0;
 323 }
 324
 325 /*
 326  * Use mingw specific stat()/lstat()/fstat() implementations on Windows.
 327  */
 328 #ifndef __MINGW64_VERSION_MAJOR
 329 #define off_t off64_t
 330 #define lseek _lseeki64
 331 #endif
 332
 333 /* use struct stat with 64 bit st_size */
 334 #ifdef stat
 335 #undef stat
 336 #endif
 337 #define stat _stati64
 338 int mingw_lstat(const char *file_name, struct stat *buf);
 339 int mingw_stat(const char *file_name, struct stat *buf);
 340 int mingw_fstat(int fd, struct stat *buf);
 341 #ifdef fstat
 342 #undef fstat
 343 #endif
 344 #define fstat mingw_fstat
 345 #ifdef lstat
 346 #undef lstat
 347 #endif
 348 #define lstat mingw_lstat
 349
 350 #ifndef _stati64
 351 # define _stati64(x,y) mingw_stat(x,y)
 352 #elif defined (_USE_32BIT_TIME_T)
 353 # define _stat32i64(x,y) mingw_stat(x,y)
 354 #else
 355 # define _stat64(x,y) mingw_stat(x,y)
 356 #endif
 357
 358 int mingw_utime(const char *file_name, const struct utimbuf *times);
 359 #define utime mingw_utime
 360
 361 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 362                      const char *dir,
 363                      int fhin, int fhout, int fherr);
 364 int mingw_execvp(const char *cmd, char *const *argv);
 365 #define execvp mingw_execvp
 366 int mingw_execv(const char *cmd, char *const *argv);
 367 #define execv mingw_execv
 368
 369 static inline unsigned int git_ntohl(unsigned int x)
 370 { return (unsigned int)ntohl(x); }
 371 #define ntohl git_ntohl
 372
 373 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 374 #define signal mingw_signal
 375
 376 int mingw_raise(int sig);
 377 #define raise mingw_raise
 378
 379 /*
 380  * ANSI emulation wrappers
 381  */
 382
 383 void winansi_init(void);
 384 HANDLE winansi_get_osfhandle(int fd);
 385
 386 /*
 387  * git specific compatibility
 388  */
 389
 390 #define has_dos_drive_prefix(path) \
 391         (isalpha(*(path)) && (path)[1] == ':' ? 2 : 0)
 392 int mingw_skip_dos_drive_prefix(char **path);
 393 #define skip_dos_drive_prefix mingw_skip_dos_drive_prefix
 394 #define is_dir_sep(c) ((c) == '/' || (c) == '\\')
 395 static inline char *mingw_find_last_dir_sep(const char *path)
 396 {
 397         char *ret = NULL;
 398         for (; *path; ++path)
 399                 if (is_dir_sep(*path))
 400                         ret = (char *)path;
 401         return ret;
 402 }
 403 static inline void convert_slashes(char *path)
 404 {
 405         for (; *path; path++)
 406                 if (*path == '\\')
 407                         *path = '/';
 408 }
 409 #define find_last_dir_sep mingw_find_last_dir_sep
 410 int mingw_offset_1st_component(const char *path);
 411 #define offset_1st_component mingw_offset_1st_component
 412 #define PATH_SEP ';'
 413 #if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
 414 #define PRIuMAX "I64u"
 415 #define PRId64 "I64d"
 416 #else
 417 #include <inttypes.h>
 418 #endif
 419
 420 /**
 421  * Converts UTF-8 encoded string to UTF-16LE.
 422  *
 423  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 424  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 425  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 426  * Unicode) are converted to hex-code.
 427  *
 428  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 429  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 430  *
 431  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 432  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 433  *
 434  * The maximum space is needed only if the entire input string consists of
 435  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 436  *
 437  *               |                   | UTF-8 | UTF-16 |
 438  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 439  * --------------+-------------------+-------+--------+-------
 440  * 000000-00007f | 0-7f              |   1   |   1    |  1
 441  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 442  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 443  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 444  * invalid       | 80-9f             |   1   |  2 (b) |  2
 445  * invalid       | a0-ff             |   1   |   1    |  1
 446  *
 447  * (a) encoded as UTF-16 surrogate pair
 448  * (b) encoded as two hex digits
 449  *
 450  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 451  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 452  * encodes as only 4 UTF-8 bytes.
 453  *
 454  * Parameters:
 455  * wcs: wide char target buffer
 456  * utf: string to convert
 457  * wcslen: size of target buffer (in wchar_t's)
 458  * utflen: size of string to convert, or -1 if 0-terminated
 459  *
 460  * Returns:
 461  * length of converted string (_wcslen(wcs)), or -1 on failure
 462  *
 463  * Errors:
 464  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 465  * ERANGE: the output buffer is too small
 466  */
 467 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 468
 469 /**
 470  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 471  */
 472 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 473 {
 474         return xutftowcsn(wcs, utf, wcslen, -1);
 475 }
 476
 477 /**
 478  * Simplified file system specific variant of xutftowcsn, assumes output
 479  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 480  * fails with ENAMETOOLONG if input string is too long.
 481  */
 482 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 483 {
 484         int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
 485         if (result < 0 && errno == ERANGE)
 486                 errno = ENAMETOOLONG;
 487         return result;
 488 }
 489
 490 /**
 491  * Converts UTF-16LE encoded string to UTF-8.
 492  *
 493  * Maximum space requirement for the target buffer is three UTF-8 chars per
 494  * wide char ((_wcslen(wcs) * 3) + 1).
 495  *
 496  * The maximum space is needed only if the entire input string consists of
 497  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 498  * modulo surrogate pairs), as per the following table:
 499  *
 500  *               |                       | UTF-16 | UTF-8 |
 501  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 502  * --------------+-----------------------+--------+-------+-------
 503  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 504  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 505  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 506  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 507  *
 508  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 509  *
 510  * Parameters:
 511  * utf: target buffer
 512  * wcs: wide string to convert
 513  * utflen: size of target buffer
 514  *
 515  * Returns:
 516  * length of converted string, or -1 on failure
 517  *
 518  * Errors:
 519  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 520  * ERANGE: the output buffer is too small
 521  */
 522 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 523
 524 /*
 525  * A critical section used in the implementation of the spawn
 526  * functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
 527  * the replacement main() macro below.
 528  */
 529 extern CRITICAL_SECTION pinfo_cs;
 530
 531 /*
 532  * A replacement of main() that adds win32 specific initialization.
 533  */
 534
 535 void mingw_startup(void);
 536 #define main(c,v) dummy_decl_mingw_main(void); \
 537 static int mingw_main(c,v); \
 538 int main(int argc, const char **argv) \
 539 { \
 540         mingw_startup(); \
 541         return mingw_main(__argc, (void *)__argv); \
 542 } \
 543 static int mingw_main(c,v)
 544
 545 /*
 546  * Used by Pthread API implementation for Windows
 547  */
 548 extern int err_win_to_posix(DWORD winerr);