compat/mingw.h

   1 #include <winsock2.h>
   2 #include <ws2tcpip.h>
   3
   4 /*
   5  * things that are not available in header files
   6  */
   7
   8 typedef int pid_t;
   9 typedef int uid_t;
  10 typedef int socklen_t;
  11 #define hstrerror strerror
  12
  13 #define S_IFLNK    0120000 /* Symbolic link */
  14 #define S_ISLNK(x) (((x) & S_IFMT) == S_IFLNK)
  15 #define S_ISSOCK(x) 0
  16
  17 #define S_IRGRP 0
  18 #define S_IWGRP 0
  19 #define S_IXGRP 0
  20 #define S_IRWXG (S_IRGRP | S_IWGRP | S_IXGRP)
  21 #define S_IROTH 0
  22 #define S_IWOTH 0
  23 #define S_IXOTH 0
  24 #define S_IRWXO (S_IROTH | S_IWOTH | S_IXOTH)
  25
  26 #define S_ISUID 0004000
  27 #define S_ISGID 0002000
  28 #define S_ISVTX 0001000
  29
  30 #define WIFEXITED(x) 1
  31 #define WIFSIGNALED(x) 0
  32 #define WEXITSTATUS(x) ((x) & 0xff)
  33 #define WTERMSIG(x) SIGTERM
  34
  35 #ifndef EWOULDBLOCK
  36 #define EWOULDBLOCK EAGAIN
  37 #endif
  38 #ifndef ELOOP
  39 #define ELOOP EMLINK
  40 #endif
  41 #define SHUT_WR SD_SEND
  42
  43 #define SIGHUP 1
  44 #define SIGQUIT 3
  45 #define SIGKILL 9
  46 #define SIGPIPE 13
  47 #define SIGALRM 14
  48 #define SIGCHLD 17
  49
  50 #define F_GETFD 1
  51 #define F_SETFD 2
  52 #define FD_CLOEXEC 0x1
  53
  54 #ifndef EAFNOSUPPORT
  55 #define EAFNOSUPPORT WSAEAFNOSUPPORT
  56 #endif
  57 #ifndef ECONNABORTED
  58 #define ECONNABORTED WSAECONNABORTED
  59 #endif
  60
  61 struct passwd {
  62         char *pw_name;
  63         char *pw_gecos;
  64         char *pw_dir;
  65 };
  66
  67 typedef void (__cdecl *sig_handler_t)(int);
  68 struct sigaction {
  69         sig_handler_t sa_handler;
  70         unsigned sa_flags;
  71 };
  72 #define SA_RESTART 0
  73
  74 struct itimerval {
  75         struct timeval it_value, it_interval;
  76 };
  77 #define ITIMER_REAL 0
  78
  79 /*
  80  * sanitize preprocessor namespace polluted by Windows headers defining
  81  * macros which collide with git local versions
  82  */
  83 #undef HELP_COMMAND /* from winuser.h */
  84
  85 /*
  86  * trivial stubs
  87  */
  88
  89 static inline int readlink(const char *path, char *buf, size_t bufsiz)
  90 { errno = ENOSYS; return -1; }
  91 static inline int symlink(const char *oldpath, const char *newpath)
  92 { errno = ENOSYS; return -1; }
  93 static inline int fchmod(int fildes, mode_t mode)
  94 { errno = ENOSYS; return -1; }
  95 static inline pid_t fork(void)
  96 { errno = ENOSYS; return -1; }
  97 static inline unsigned int alarm(unsigned int seconds)
  98 { return 0; }
  99 static inline int fsync(int fd)
 100 { return _commit(fd); }
 101 static inline void sync(void)
 102 {}
 103 static inline uid_t getuid(void)
 104 { return 1; }
 105 static inline struct passwd *getpwnam(const char *name)
 106 { return NULL; }
 107 static inline int fcntl(int fd, int cmd, ...)
 108 {
 109         if (cmd == F_GETFD || cmd == F_SETFD)
 110                 return 0;
 111         errno = EINVAL;
 112         return -1;
 113 }
 114 /* bash cannot reliably detect negative return codes as failure */
 115 #define exit(code) exit((code) & 0xff)
 116 #define sigemptyset(x) (void)0
 117 static inline int sigaddset(sigset_t *set, int signum)
 118 { return 0; }
 119 #define SIG_UNBLOCK 0
 120 static inline int sigprocmask(int how, const sigset_t *set, sigset_t *oldset)
 121 { return 0; }
 122 static inline pid_t getppid(void)
 123 { return 1; }
 124 static inline pid_t getpgid(pid_t pid)
 125 { return pid == 0 ? getpid() : pid; }
 126 static inline pid_t tcgetpgrp(int fd)
 127 { return getpid(); }
 128
 129 /*
 130  * simple adaptors
 131  */
 132
 133 int mingw_mkdir(const char *path, int mode);
 134 #define mkdir mingw_mkdir
 135
 136 #define WNOHANG 1
 137 pid_t waitpid(pid_t pid, int *status, int options);
 138
 139 #define kill mingw_kill
 140 int mingw_kill(pid_t pid, int sig);
 141
 142 #ifndef NO_OPENSSL
 143 #include <openssl/ssl.h>
 144 static inline int mingw_SSL_set_fd(SSL *ssl, int fd)
 145 {
 146         return SSL_set_fd(ssl, _get_osfhandle(fd));
 147 }
 148 #define SSL_set_fd mingw_SSL_set_fd
 149
 150 static inline int mingw_SSL_set_rfd(SSL *ssl, int fd)
 151 {
 152         return SSL_set_rfd(ssl, _get_osfhandle(fd));
 153 }
 154 #define SSL_set_rfd mingw_SSL_set_rfd
 155
 156 static inline int mingw_SSL_set_wfd(SSL *ssl, int fd)
 157 {
 158         return SSL_set_wfd(ssl, _get_osfhandle(fd));
 159 }
 160 #define SSL_set_wfd mingw_SSL_set_wfd
 161 #endif
 162
 163 /*
 164  * implementations of missing functions
 165  */
 166
 167 int pipe(int filedes[2]);
 168 unsigned int sleep (unsigned int seconds);
 169 int mkstemp(char *template);
 170 int gettimeofday(struct timeval *tv, void *tz);
 171 struct tm *gmtime_r(const time_t *timep, struct tm *result);
 172 struct tm *localtime_r(const time_t *timep, struct tm *result);
 173 int getpagesize(void);  /* defined in MinGW's libgcc.a */
 174 struct passwd *getpwuid(uid_t uid);
 175 int setitimer(int type, struct itimerval *in, struct itimerval *out);
 176 int sigaction(int sig, struct sigaction *in, struct sigaction *out);
 177 int link(const char *oldpath, const char *newpath);
 178
 179 /*
 180  * replacements of existing functions
 181  */
 182
 183 int mingw_unlink(const char *pathname);
 184 #define unlink mingw_unlink
 185
 186 int mingw_rmdir(const char *path);
 187 #define rmdir mingw_rmdir
 188
 189 int mingw_open (const char *filename, int oflags, ...);
 190 #define open mingw_open
 191
 192 int mingw_fgetc(FILE *stream);
 193 #define fgetc mingw_fgetc
 194
 195 FILE *mingw_fopen (const char *filename, const char *otype);
 196 #define fopen mingw_fopen
 197
 198 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream);
 199 #define freopen mingw_freopen
 200
 201 int mingw_fflush(FILE *stream);
 202 #define fflush mingw_fflush
 203
 204 int mingw_access(const char *filename, int mode);
 205 #undef access
 206 #define access mingw_access
 207
 208 int mingw_chdir(const char *dirname);
 209 #define chdir mingw_chdir
 210
 211 int mingw_chmod(const char *filename, int mode);
 212 #define chmod mingw_chmod
 213
 214 char *mingw_mktemp(char *template);
 215 #define mktemp mingw_mktemp
 216
 217 char *mingw_getcwd(char *pointer, int len);
 218 #define getcwd mingw_getcwd
 219
 220 char *mingw_getenv(const char *name);
 221 #define getenv mingw_getenv
 222 int mingw_putenv(const char *namevalue);
 223 #define putenv mingw_putenv
 224 #define unsetenv mingw_putenv
 225
 226 int mingw_gethostname(char *host, int namelen);
 227 #define gethostname mingw_gethostname
 228
 229 struct hostent *mingw_gethostbyname(const char *host);
 230 #define gethostbyname mingw_gethostbyname
 231
 232 void mingw_freeaddrinfo(struct addrinfo *res);
 233 #define freeaddrinfo mingw_freeaddrinfo
 234
 235 int mingw_getaddrinfo(const char *node, const char *service,
 236                       const struct addrinfo *hints, struct addrinfo **res);
 237 #define getaddrinfo mingw_getaddrinfo
 238
 239 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
 240                       char *host, DWORD hostlen, char *serv, DWORD servlen,
 241                       int flags);
 242 #define getnameinfo mingw_getnameinfo
 243
 244 int mingw_socket(int domain, int type, int protocol);
 245 #define socket mingw_socket
 246
 247 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz);
 248 #define connect mingw_connect
 249
 250 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz);
 251 #define bind mingw_bind
 252
 253 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen);
 254 #define setsockopt mingw_setsockopt
 255
 256 int mingw_shutdown(int sockfd, int how);
 257 #define shutdown mingw_shutdown
 258
 259 int mingw_listen(int sockfd, int backlog);
 260 #define listen mingw_listen
 261
 262 int mingw_accept(int sockfd, struct sockaddr *sa, socklen_t *sz);
 263 #define accept mingw_accept
 264
 265 int mingw_rename(const char*, const char*);
 266 #define rename mingw_rename
 267
 268 #if defined(USE_WIN32_MMAP) || defined(_MSC_VER)
 269 int mingw_getpagesize(void);
 270 #define getpagesize mingw_getpagesize
 271 #endif
 272
 273 struct rlimit {
 274         unsigned int rlim_cur;
 275 };
 276 #define RLIMIT_NOFILE 0
 277
 278 static inline int getrlimit(int resource, struct rlimit *rlp)
 279 {
 280         if (resource != RLIMIT_NOFILE) {
 281                 errno = EINVAL;
 282                 return -1;
 283         }
 284
 285         rlp->rlim_cur = 2048;
 286         return 0;
 287 }
 288
 289 /*
 290  * Use mingw specific stat()/lstat()/fstat() implementations on Windows.
 291  */
 292 #define off_t off64_t
 293 #define lseek _lseeki64
 294
 295 /* use struct stat with 64 bit st_size */
 296 #ifdef stat
 297 #undef stat
 298 #endif
 299 #define stat _stati64
 300 int mingw_lstat(const char *file_name, struct stat *buf);
 301 int mingw_stat(const char *file_name, struct stat *buf);
 302 int mingw_fstat(int fd, struct stat *buf);
 303 #ifdef fstat
 304 #undef fstat
 305 #endif
 306 #define fstat mingw_fstat
 307 #ifdef lstat
 308 #undef lstat
 309 #endif
 310 #define lstat mingw_lstat
 311
 312 #ifndef _stati64
 313 # define _stati64(x,y) mingw_stat(x,y)
 314 #elif defined (_USE_32BIT_TIME_T)
 315 # define _stat32i64(x,y) mingw_stat(x,y)
 316 #else
 317 # define _stat64(x,y) mingw_stat(x,y)
 318 #endif
 319
 320 int mingw_utime(const char *file_name, const struct utimbuf *times);
 321 #define utime mingw_utime
 322
 323 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env,
 324                      const char *dir,
 325                      int fhin, int fhout, int fherr);
 326 int mingw_execvp(const char *cmd, char *const *argv);
 327 #define execvp mingw_execvp
 328 int mingw_execv(const char *cmd, char *const *argv);
 329 #define execv mingw_execv
 330
 331 static inline unsigned int git_ntohl(unsigned int x)
 332 { return (unsigned int)ntohl(x); }
 333 #define ntohl git_ntohl
 334
 335 sig_handler_t mingw_signal(int sig, sig_handler_t handler);
 336 #define signal mingw_signal
 337
 338 int mingw_raise(int sig);
 339 #define raise mingw_raise
 340
 341 /*
 342  * ANSI emulation wrappers
 343  */
 344
 345 void winansi_init(void);
 346 HANDLE winansi_get_osfhandle(int fd);
 347
 348 /*
 349  * git specific compatibility
 350  */
 351
 352 #define has_dos_drive_prefix(path) (isalpha(*(path)) && (path)[1] == ':')
 353 #define is_dir_sep(c) ((c) == '/' || (c) == '\\')
 354 static inline char *mingw_find_last_dir_sep(const char *path)
 355 {
 356         char *ret = NULL;
 357         for (; *path; ++path)
 358                 if (is_dir_sep(*path))
 359                         ret = (char *)path;
 360         return ret;
 361 }
 362 #define find_last_dir_sep mingw_find_last_dir_sep
 363 int mingw_offset_1st_component(const char *path);
 364 #define offset_1st_component mingw_offset_1st_component
 365 #define PATH_SEP ';'
 366 #define PRIuMAX "I64u"
 367 #define PRId64 "I64d"
 368
 369 void mingw_open_html(const char *path);
 370 #define open_html mingw_open_html
 371
 372 void mingw_mark_as_git_dir(const char *dir);
 373 #define mark_as_git_dir mingw_mark_as_git_dir
 374
 375 /**
 376  * Converts UTF-8 encoded string to UTF-16LE.
 377  *
 378  * To support repositories with legacy-encoded file names, invalid UTF-8 bytes
 379  * 0xa0 - 0xff are converted to corresponding printable Unicode chars \u00a0 -
 380  * \u00ff, and invalid UTF-8 bytes 0x80 - 0x9f (which would make non-printable
 381  * Unicode) are converted to hex-code.
 382  *
 383  * Lead-bytes not followed by an appropriate number of trail-bytes, over-long
 384  * encodings and 4-byte encodings > \u10ffff are detected as invalid UTF-8.
 385  *
 386  * Maximum space requirement for the target buffer is two wide chars per UTF-8
 387  * char (((strlen(utf) * 2) + 1) [* sizeof(wchar_t)]).
 388  *
 389  * The maximum space is needed only if the entire input string consists of
 390  * invalid UTF-8 bytes in range 0x80-0x9f, as per the following table:
 391  *
 392  *               |                   | UTF-8 | UTF-16 |
 393  *   Code point  |  UTF-8 sequence   | bytes | words  | ratio
 394  * --------------+-------------------+-------+--------+-------
 395  * 000000-00007f | 0-7f              |   1   |   1    |  1
 396  * 000080-0007ff | c2-df + 80-bf     |   2   |   1    |  0.5
 397  * 000800-00ffff | e0-ef + 2 * 80-bf |   3   |   1    |  0.33
 398  * 010000-10ffff | f0-f4 + 3 * 80-bf |   4   |  2 (a) |  0.5
 399  * invalid       | 80-9f             |   1   |  2 (b) |  2
 400  * invalid       | a0-ff             |   1   |   1    |  1
 401  *
 402  * (a) encoded as UTF-16 surrogate pair
 403  * (b) encoded as two hex digits
 404  *
 405  * Note that, while the UTF-8 encoding scheme can be extended to 5-byte, 6-byte
 406  * or even indefinite-byte sequences, the largest valid code point \u10ffff
 407  * encodes as only 4 UTF-8 bytes.
 408  *
 409  * Parameters:
 410  * wcs: wide char target buffer
 411  * utf: string to convert
 412  * wcslen: size of target buffer (in wchar_t's)
 413  * utflen: size of string to convert, or -1 if 0-terminated
 414  *
 415  * Returns:
 416  * length of converted string (_wcslen(wcs)), or -1 on failure
 417  *
 418  * Errors:
 419  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 420  * ERANGE: the output buffer is too small
 421  */
 422 int xutftowcsn(wchar_t *wcs, const char *utf, size_t wcslen, int utflen);
 423
 424 /**
 425  * Simplified variant of xutftowcsn, assumes input string is \0-terminated.
 426  */
 427 static inline int xutftowcs(wchar_t *wcs, const char *utf, size_t wcslen)
 428 {
 429         return xutftowcsn(wcs, utf, wcslen, -1);
 430 }
 431
 432 /**
 433  * Simplified file system specific variant of xutftowcsn, assumes output
 434  * buffer size is MAX_PATH wide chars and input string is \0-terminated,
 435  * fails with ENAMETOOLONG if input string is too long.
 436  */
 437 static inline int xutftowcs_path(wchar_t *wcs, const char *utf)
 438 {
 439         int result = xutftowcsn(wcs, utf, MAX_PATH, -1);
 440         if (result < 0 && errno == ERANGE)
 441                 errno = ENAMETOOLONG;
 442         return result;
 443 }
 444
 445 /**
 446  * Converts UTF-16LE encoded string to UTF-8.
 447  *
 448  * Maximum space requirement for the target buffer is three UTF-8 chars per
 449  * wide char ((_wcslen(wcs) * 3) + 1).
 450  *
 451  * The maximum space is needed only if the entire input string consists of
 452  * UTF-16 words in range 0x0800-0xd7ff or 0xe000-0xffff (i.e. \u0800-\uffff
 453  * modulo surrogate pairs), as per the following table:
 454  *
 455  *               |                       | UTF-16 | UTF-8 |
 456  *   Code point  |  UTF-16 sequence      | words  | bytes | ratio
 457  * --------------+-----------------------+--------+-------+-------
 458  * 000000-00007f | 0000-007f             |   1    |   1   |  1
 459  * 000080-0007ff | 0080-07ff             |   1    |   2   |  2
 460  * 000800-00ffff | 0800-d7ff / e000-ffff |   1    |   3   |  3
 461  * 010000-10ffff | d800-dbff + dc00-dfff |   2    |   4   |  2
 462  *
 463  * Note that invalid code points > 10ffff cannot be represented in UTF-16.
 464  *
 465  * Parameters:
 466  * utf: target buffer
 467  * wcs: wide string to convert
 468  * utflen: size of target buffer
 469  *
 470  * Returns:
 471  * length of converted string, or -1 on failure
 472  *
 473  * Errors:
 474  * EINVAL: one of the input parameters is invalid (e.g. NULL)
 475  * ERANGE: the output buffer is too small
 476  */
 477 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen);
 478
 479 /*
 480  * A critical section used in the implementation of the spawn
 481  * functions (mingw_spawnv[p]e()) and waitpid(). Intialised in
 482  * the replacement main() macro below.
 483  */
 484 extern CRITICAL_SECTION pinfo_cs;
 485
 486 /*
 487  * A replacement of main() that adds win32 specific initialization.
 488  */
 489
 490 void mingw_startup();
 491 #define main(c,v) dummy_decl_mingw_main(); \
 492 static int mingw_main(c,v); \
 493 int main(int argc, char **argv) \
 494 { \
 495         mingw_startup(); \
 496         return mingw_main(__argc, (void *)__argv); \
 497 } \
 498 static int mingw_main(c,v)
 499
 500 /*
 501  * Used by Pthread API implementation for Windows
 502  */
 503 extern int err_win_to_posix(DWORD winerr);