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