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