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 extern int mingw_core_config(const char *var, const char *value, void *cb);
  15 #define platform_core_config mingw_core_config
  16
  17 /*
  18  * things that are not available in header files
  19  */
  20
  21 typedef int uid_t;
  22 typedef int socklen_t;
  23 #ifndef __MINGW64_VERSION_MAJOR
  24 typedef int pid_t;
  25 #define hstrerror strerror
  26 #endif
  27
  28 #define S_IFLNK    0120000 /* Symbolic link */
  29 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
  30 #define S_ISSOCK(x) 0
  31
  32 #ifndef S_IRWXG
  33 #define S_IRGRP 0
  34 #define S_IWGRP 0
  35 #define S_IXGRP 0
  36 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
  37 #endif
  38 #ifndef S_IRWXO
  39 #define S_IROTH 0
  40 #define S_IWOTH 0
  41 #define S_IXOTH 0
  42 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
  43 #endif
  44
  45 #define S_ISUID 0004000
  46 #define S_ISGID 0002000
  47 #define S_ISVTX 0001000
  48
  49 #define WIFEXITED(x) 1
  50 #define WIFSIGNALED(x) 0
  51 #define WEXITSTATUS(x) ((x) & 0xff)
  52 #define WTERMSIG(x) SIGTERM
  53
  54 #ifndef EWOULDBLOCK
  55 #define EWOULDBLOCK EAGAIN
  56 #endif
  57 #ifndef ELOOP
  58 #define ELOOP EMLINK
  59 #endif
  60 #define SHUT_WR SD_SEND
  61
  62 #define SIGHUP 1
  63 #define SIGQUIT 3
  64 #define SIGKILL 9
  65 #define SIGPIPE 13
  66 #define SIGALRM 14
  67 #define SIGCHLD 17
  68
  69 #define F_GETFD 1
  70 #define F_SETFD 2
  71 #define FD_CLOEXEC 0x1
  72
  73 #if !defined O_CLOEXEC && defined O_NOINHERIT
  74 #define O_CLOEXEC       O_NOINHERIT
  75 #endif
  76
  77 #ifndef EAFNOSUPPORT
  78 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  79 #endif
  80 #ifndef ECONNABORTED
  81 #define ECONNABORTED WSAECONNABORTED
  82 #endif
  83 #ifndef ENOTSOCK
  84 #define ENOTSOCK WSAENOTSOCK
  85 #endif
  86
  87 struct passwd {
  88         char *pw_name;
  89         char *pw_gecos;
  90         char *pw_dir;
  91 };
  92
  93 typedef void (__cdecl *sig_handler_t)(int);
  94 struct sigaction {
  95         sig_handler_t sa_handler;
  96         unsigned sa_flags;
  97 };
  98 #define SA_RESTART 0
  99
 100 struct itimerval {
 101         struct timeval it_value, it_interval;
 102 };
 103 #define ITIMER_REAL 0
 104
 105 struct utsname {
 106         char sysname[16];
 107         char nodename[1];
 108         char release[16];
 109         char version[16];
 110         char machine[1];
 111 };
 112
 113 /*
 114  * sanitize preprocessor namespace polluted by Windows headers defining
 115  * macros which collide with git local versions
 116  */
 117 #undef HELP_COMMAND /* from winuser.h */
 118
 119 /*
 120  * trivial stubs
 121  */
 122
 123 static inline int readlink(const char *path, char *buf, size_t bufsiz)
 124 { errno = ENOSYS; return -1; }
 125 static inline int symlink(const char *oldpath, const char *newpath)
 126 { errno = ENOSYS; return -1; }
 127 static inline int fchmod(int fildes, mode_t mode)
 128 { errno = ENOSYS; return -1; }
 129 #ifndef __MINGW64_VERSION_MAJOR
 130 static inline pid_t fork(void)
 131 { errno = ENOSYS; return -1; }
 132 #endif
 133 static inline unsigned int alarm(unsigned int seconds)
 134 { return 0; }
 135 static inline int fsync(int fd)
 136 { return _commit(fd); }
 137 static inline void sync(void)
 138 {}
 139 static inline uid_t getuid(void)
 140 { return 1; }
 141 static inline struct passwd *getpwnam(const char *name)
 142 { return NULL; }
 143 static inline int fcntl(int fd, int cmd, ...)
 144 {
 145         if (cmd == F_GETFD || cmd == F_SETFD)
 146                 return 0;
 147         errno = EINVAL;
 148         return -1;
 149 }
 150 /* bash cannot reliably detect negative return codes as failure */
 151 #define exit(code) exit((code) & 0xff)
 152 #define sigemptyset(x) (void)0
 153 static inline int sigaddset(sigset_t *set, int signum)
 154 { return 0; }
 155 #define SIG_BLOCK 0
 156 #define SIG_UNBLOCK 0
 157 static inline int sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
 158 { return 0; }
 159 static inline pid_t getppid(void)
 160 { return 1; }
 161 static inline pid_t getpgid(pid_t pid)
 162 { return pid == 0 ? getpid() : pid; }
 163 static inline pid_t tcgetpgrp(int fd)
 164 { return getpid(); }
 165
 166 /*
 167  * simple adaptors
 168  */
 169
 170 int mingw_mkdir(const char *path, int mode);
 171 #define mkdir mingw_mkdir
 172
 173 #define WNOHANG 1
 174 pid_t waitpid(pid_t pid, int *status, int options);
 175
 176 #define kill mingw_kill
 177 int mingw_kill(pid_t pid, int sig);
 178
 179 #ifndef NO_OPENSSL
 180 #include <openssl/ssl.h>
 181 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 182 {
 183         return SSL_set_fd(ssl, _get_osfhandle(fd));
 184 }
 185 #define SSL_set_fd mingw_SSL_set_fd
 186
 187 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 188 {
 189         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 190 }
 191 #define SSL_set_rfd mingw_SSL_set_rfd
 192
 193 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 194 {
 195         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 196 }
 197 #define SSL_set_wfd mingw_SSL_set_wfd
 198 #endif
 199
 200 /*
 201  * implementations of missing functions
 202  */
 203
 204 int pipe(int filedes[2]);
 205 unsigned int sleep (unsigned int seconds);
 206 int mkstemp(char *template);
 207 int gettimeofday(struct timeval *tv, void *tz);
 208 #ifndef __MINGW64_VERSION_MAJOR
 209 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 210 struct tm *localtime_r(const time_t *timep, struct tm *result);
 211 #endif
 212 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 213 struct passwd *getpwuid(uid_t uid);
 214 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 215 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 216 int link(const char *oldpath, const char *newpath);
 217 int uname(struct utsname *buf);
 218
 219 /*
 220  * replacements of existing functions
 221  */
 222
 223 int mingw_unlink(const char *pathname);
 224 #define unlink mingw_unlink
 225
 226 int mingw_rmdir(const char *path);
 227 #define rmdir mingw_rmdir
 228
 229 int mingw_open (const char *filename, int oflags, ...);
 230 #define open mingw_open
 231
 232 int mingw_fgetc(FILE *stream);
 233 #define fgetc mingw_fgetc
 234
 235 FILE *mingw_fopen (const char *filename, const char *otype);
 236 #define fopen mingw_fopen
 237
 238 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 239 #define freopen mingw_freopen
 240
 241 int mingw_fflush(FILE *stream);
 242 #define fflush mingw_fflush
 243
 244 ssize_t mingw_write(int fd, const void *buf, size_t len);
 245 #define write mingw_write
 246
 247 int mingw_access(const char *filename, int mode);
 248 #undef access
 249 #define access mingw_access
 250
 251 int mingw_chdir(const char *dirname);
 252 #define chdir mingw_chdir
 253
 254 int mingw_chmod(const char *filename, int mode);
 255 #define chmod mingw_chmod
 256
 257 char *mingw_mktemp(char *template);
 258 #define mktemp mingw_mktemp
 259
 260 char *mingw_getcwd(char *pointer, int len);
 261 #define getcwd mingw_getcwd
 262
 263 char *mingw_getenv(const char *name);
 264 #define getenv mingw_getenv
 265 int mingw_putenv(const char *namevalue);
 266 #define putenv mingw_putenv
 267 #define unsetenv mingw_putenv
 268
 269 int mingw_gethostname(char *host, int namelen);
 270 #define gethostname mingw_gethostname
 271
 272 struct hostent *mingw_gethostbyname(const char *host);
 273 #define gethostbyname mingw_gethostbyname
 274
 275 void mingw_freeaddrinfo(struct addrinfo *res);
 276 #define freeaddrinfo mingw_freeaddrinfo
 277
 278 int mingw_getaddrinfo(const char *node, const char *service,
 279                       const struct addrinfo *hints, struct addrinfo **res);
 280 #define getaddrinfo mingw_getaddrinfo
 281
 282 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 283                       char *host, DWORD hostlen, char *serv, DWORD servlen,
 284                       int flags);
 285 #define getnameinfo mingw_getnameinfo
 286
 287 int mingw_socket(int domain, int type, int protocol);
 288 #define socket mingw_socket
 289
 290 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 291 #define connect mingw_connect
 292
 293 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 294 #define bind mingw_bind
 295
 296 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 297 #define setsockopt mingw_setsockopt
 298
 299 int mingw_shutdown(int sockfd, int how);
 300 #define shutdown mingw_shutdown
 301
 302 int mingw_listen(int sockfd, int backlog);
 303 #define listen mingw_listen
 304
 305 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 306 #define accept mingw_accept
 307
 308 int mingw_rename(const char*, const char*);
 309 #define rename mingw_rename
 310
 311 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 312 int mingw_getpagesize(void);
 313 #define getpagesize mingw_getpagesize
 314 #endif
 315
 316 struct rlimit {
 317         unsigned int rlim_cur;
 318 };
 319 #define RLIMIT_NOFILE 0
 320
 321 static inline int getrlimit(int resource, struct rlimit *rlp)
 322 {
 323         if (resource != RLIMIT_NOFILE) {
 324                 errno = EINVAL;
 325                 return -1;
 326         }
 327
 328         rlp->rlim_cur = 2048;
 329         return 0;
 330 }
 331
 332 /*
 333  * Use mingw specific stat()/lstat()/fstat() implementations on Windows.
 334  */
 335 #ifndef __MINGW64_VERSION_MAJOR
 336 #define off_t off64_t
 337 #define lseek _lseeki64
 338 #endif
 339
 340 /* use struct stat with 64 bit st_size */
 341 #ifdef stat
 342 #undef stat
 343 #endif
 344 #define stat _stati64
 345 int mingw_lstat(const char *file_name, struct stat *buf);
 346 int mingw_stat(const char *file_name, struct stat *buf);
 347 int mingw_fstat(int fd, struct stat *buf);
 348 #ifdef fstat
 349 #undef fstat
 350 #endif
 351 #define fstat mingw_fstat
 352 #ifdef lstat
 353 #undef lstat
 354 #endif
 355 #define lstat mingw_lstat
 356
 357 #ifndef _stati64
 358 # define _stati64(x,y) mingw_stat(x,y)
 359 #elif defined (_USE_32BIT_TIME_T)
 360 # define _stat32i64(x,y) mingw_stat(x,y)
 361 #else
 362 # define _stat64(x,y) mingw_stat(x,y)
 363 #endif
 364
 365 int mingw_utime(const char *file_name, const struct utimbuf *times);
 366 #define utime mingw_utime
 367 size_t mingw_strftime(char *s, size_t max,
 368                    const char *format, const struct tm *tm);
 369 #define strftime mingw_strftime
 370
 371 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 372                      const char *dir,
 373                      int fhin, int fhout, int fherr);
 374 int mingw_execvp(const char *cmd, char *const *argv);
 375 #define execvp mingw_execvp
 376 int mingw_execv(const char *cmd, char *const *argv);
 377 #define execv mingw_execv
 378
 379 static inline unsigned int git_ntohl(unsigned int x)
 380 { return (unsigned int)ntohl(x); }
 381 #define ntohl git_ntohl
 382
 383 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 384 #define signal mingw_signal
 385
 386 int mingw_raise(int sig);
 387 #define raise mingw_raise
 388
 389 /*
 390  * ANSI emulation wrappers
 391  */
 392
 393 int winansi_isatty(int fd);
 394 #define isatty winansi_isatty
 395
 396 void winansi_init(void);
 397 HANDLE winansi_get_osfhandle(int fd);
 398
 399 /*
 400  * git specific compatibility
 401  */
 402
 403 #define has_dos_drive_prefix(path) \
 404         (isalpha(*(path)) && (path)[1] == ':' ? 2 : 0)
 405 int mingw_skip_dos_drive_prefix(char **path);
 406 #define skip_dos_drive_prefix mingw_skip_dos_drive_prefix
 407 static inline int mingw_is_dir_sep(int c)
 408 {
 409         return c == '/' || c == '\\';
 410 }
 411 #define is_dir_sep mingw_is_dir_sep
 412 static inline char *mingw_find_last_dir_sep(const char *path)
 413 {
 414         char *ret = NULL;
 415         for (; *path; ++path)
 416                 if (is_dir_sep(*path))
 417                         ret = (char *)path;
 418         return ret;
 419 }
 420 static inline void convert_slashes(char *path)
 421 {
 422         for (; *path; path++)
 423                 if (*path == '\\')
 424                         *path = '/';
 425 }
 426 #define find_last_dir_sep mingw_find_last_dir_sep
 427 int mingw_offset_1st_component(const char *path);
 428 #define offset_1st_component mingw_offset_1st_component
 429 #define PATH_SEP ';'
 430 extern char *mingw_query_user_email(void);
 431 #define query_user_email mingw_query_user_email
 432 #if !defined(__MINGW64_VERSION_MAJOR) && (!defined(_MSC_VER) || _MSC_VER < 1800)
 433 #define PRIuMAX "I64u"
 434 #define PRId64 "I64d"
 435 #else
 436 #include <inttypes.h>
 437 #endif
 438
 439 /**
 440  * Converts UTF-8 encoded string to UTF-16LE.
 441  *
 442  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 443  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 444  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 445  * Unicode) are converted to hex-code.
 446  *
 447  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 448  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 449  *
 450  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 451  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 452  *
 453  * The maximum space is needed only if the entire input string consists of
 454  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 455  *
 456  *               |                   | UTF-8 | UTF-16 |
 457  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 458  * --------------+-------------------+-------+--------+-------
 459  * 000000-00007f | 0-7f              |   1   |   1    |  1
 460  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 461  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 462  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 463  * invalid       | 80-9f             |   1   |  2 (b) |  2
 464  * invalid       | a0-ff             |   1   |   1    |  1
 465  *
 466  * (a) encoded as UTF-16 surrogate pair
 467  * (b) encoded as two hex digits
 468  *
 469  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 470  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 471  * encodes as only 4 UTF-8 bytes.
 472  *
 473  * Parameters:
 474  * wcs: wide char target buffer
 475  * utf: string to convert
 476  * wcslen: size of target buffer (in wchar_t's)
 477  * utflen: size of string to convert, or -1 if 0-terminated
 478  *
 479  * Returns:
 480  * length of converted string (_wcslen(wcs)), or -1 on failure
 481  *
 482  * Errors:
 483  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 484  * ERANGE: the output buffer is too small
 485  */
 486 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 487
 488 /**
 489  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 490  */
 491 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 492 {
 493         return xutftowcsn(wcs, utf, wcslen, -1);
 494 }
 495
 496 /**
 497  * Simplified file system specific variant of xutftowcsn, assumes output
 498  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 499  * fails with ENAMETOOLONG if input string is too long.
 500  */
 501 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 502 {
 503         int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
 504         if (result < 0 && errno == ERANGE)
 505                 errno = ENAMETOOLONG;
 506         return result;
 507 }
 508
 509 /**
 510  * Converts UTF-16LE encoded string to UTF-8.
 511  *
 512  * Maximum space requirement for the target buffer is three UTF-8 chars per
 513  * wide char ((_wcslen(wcs) * 3) + 1).
 514  *
 515  * The maximum space is needed only if the entire input string consists of
 516  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 517  * modulo surrogate pairs), as per the following table:
 518  *
 519  *               |                       | UTF-16 | UTF-8 |
 520  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 521  * --------------+-----------------------+--------+-------+-------
 522  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 523  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 524  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 525  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 526  *
 527  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 528  *
 529  * Parameters:
 530  * utf: target buffer
 531  * wcs: wide string to convert
 532  * utflen: size of target buffer
 533  *
 534  * Returns:
 535  * length of converted string, or -1 on failure
 536  *
 537  * Errors:
 538  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 539  * ERANGE: the output buffer is too small
 540  */
 541 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 542
 543 /*
 544  * A critical section used in the implementation of the spawn
 545  * functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
 546  * the replacement main() macro below.
 547  */
 548 extern CRITICAL_SECTION pinfo_cs;
 549
 550 /*
 551  * A replacement of main() that adds win32 specific initialization.
 552  */
 553
 554 void mingw_startup(void);
 555 #define main(c,v) dummy_decl_mingw_main(void); \
 556 static int mingw_main(c,v); \
 557 int main(int argc, const char **argv) \
 558 { \
 559         mingw_startup(); \
 560         return mingw_main(__argc, (void *)__argv); \
 561 } \
 562 static int mingw_main(c,v)
 563
 564 /*
 565  * Used by Pthread API implementation for Windows
 566  */
 567 extern int err_win_to_posix(DWORD winerr);