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