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