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