compat/mingw.c

   1 #include "../git-compat-util.h"
   2 #include "win32.h"
   3 #include <conio.h>
   4 #include <wchar.h>
   5 #include "../strbuf.h"
   6 #include "../run-command.h"
   7 #include "../cache.h"
   8
   9 static const int delay[] = { 0, 1, 10, 20, 40 };
  10 unsigned int _CRT_fmode = _O_BINARY;
  11
  12 int err_win_to_posix(DWORD winerr)
  13 {
  14         int error = ENOSYS;
  15         switch(winerr) {
  16         case ERROR_ACCESS_DENIED: error = EACCES; break;
  17         case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
  18         case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
  19         case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
  20         case ERROR_ALREADY_EXISTS: error = EEXIST; break;
  21         case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
  22         case ERROR_BAD_COMMAND: error = EIO; break;
  23         case ERROR_BAD_DEVICE: error = ENODEV; break;
  24         case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
  25         case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
  26         case ERROR_BAD_FORMAT: error = ENOEXEC; break;
  27         case ERROR_BAD_LENGTH: error = EINVAL; break;
  28         case ERROR_BAD_PATHNAME: error = ENOENT; break;
  29         case ERROR_BAD_PIPE: error = EPIPE; break;
  30         case ERROR_BAD_UNIT: error = ENODEV; break;
  31         case ERROR_BAD_USERNAME: error = EINVAL; break;
  32         case ERROR_BROKEN_PIPE: error = EPIPE; break;
  33         case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
  34         case ERROR_BUSY: error = EBUSY; break;
  35         case ERROR_BUSY_DRIVE: error = EBUSY; break;
  36         case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
  37         case ERROR_CANNOT_MAKE: error = EACCES; break;
  38         case ERROR_CANTOPEN: error = EIO; break;
  39         case ERROR_CANTREAD: error = EIO; break;
  40         case ERROR_CANTWRITE: error = EIO; break;
  41         case ERROR_CRC: error = EIO; break;
  42         case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
  43         case ERROR_DEVICE_IN_USE: error = EBUSY; break;
  44         case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
  45         case ERROR_DIRECTORY: error = EINVAL; break;
  46         case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
  47         case ERROR_DISK_CHANGE: error = EIO; break;
  48         case ERROR_DISK_FULL: error = ENOSPC; break;
  49         case ERROR_DRIVE_LOCKED: error = EBUSY; break;
  50         case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
  51         case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
  52         case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
  53         case ERROR_FILE_EXISTS: error = EEXIST; break;
  54         case ERROR_FILE_INVALID: error = ENODEV; break;
  55         case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
  56         case ERROR_GEN_FAILURE: error = EIO; break;
  57         case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
  58         case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
  59         case ERROR_INVALID_ACCESS: error = EACCES; break;
  60         case ERROR_INVALID_ADDRESS: error = EFAULT; break;
  61         case ERROR_INVALID_BLOCK: error = EFAULT; break;
  62         case ERROR_INVALID_DATA: error = EINVAL; break;
  63         case ERROR_INVALID_DRIVE: error = ENODEV; break;
  64         case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
  65         case ERROR_INVALID_FLAGS: error = EINVAL; break;
  66         case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
  67         case ERROR_INVALID_HANDLE: error = EBADF; break;
  68         case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
  69         case ERROR_INVALID_NAME: error = EINVAL; break;
  70         case ERROR_INVALID_OWNER: error = EINVAL; break;
  71         case ERROR_INVALID_PARAMETER: error = EINVAL; break;
  72         case ERROR_INVALID_PASSWORD: error = EPERM; break;
  73         case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
  74         case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
  75         case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
  76         case ERROR_INVALID_WORKSTATION: error = EACCES; break;
  77         case ERROR_IO_DEVICE: error = EIO; break;
  78         case ERROR_IO_INCOMPLETE: error = EINTR; break;
  79         case ERROR_LOCKED: error = EBUSY; break;
  80         case ERROR_LOCK_VIOLATION: error = EACCES; break;
  81         case ERROR_LOGON_FAILURE: error = EACCES; break;
  82         case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
  83         case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
  84         case ERROR_MORE_DATA: error = EPIPE; break;
  85         case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
  86         case ERROR_NOACCESS: error = EFAULT; break;
  87         case ERROR_NONE_MAPPED: error = EINVAL; break;
  88         case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
  89         case ERROR_NOT_READY: error = EAGAIN; break;
  90         case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
  91         case ERROR_NO_DATA: error = EPIPE; break;
  92         case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
  93         case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
  94         case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
  95         case ERROR_OPEN_FAILED: error = EIO; break;
  96         case ERROR_OPEN_FILES: error = EBUSY; break;
  97         case ERROR_OPERATION_ABORTED: error = EINTR; break;
  98         case ERROR_OUTOFMEMORY: error = ENOMEM; break;
  99         case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
 100         case ERROR_PATH_BUSY: error = EBUSY; break;
 101         case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
 102         case ERROR_PIPE_BUSY: error = EBUSY; break;
 103         case ERROR_PIPE_CONNECTED: error = EPIPE; break;
 104         case ERROR_PIPE_LISTENING: error = EPIPE; break;
 105         case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
 106         case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
 107         case ERROR_READ_FAULT: error = EIO; break;
 108         case ERROR_SEEK: error = EIO; break;
 109         case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
 110         case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
 111         case ERROR_SHARING_VIOLATION: error = EACCES; break;
 112         case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
 113         case ERROR_SWAPERROR: error = ENOENT; break;
 114         case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
 115         case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
 116         case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
 117         case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
 118         case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
 119         case ERROR_WRITE_FAULT: error = EIO; break;
 120         case ERROR_WRITE_PROTECT: error = EROFS; break;
 121         }
 122         return error;
 123 }
 124
 125 static inline int is_file_in_use_error(DWORD errcode)
 126 {
 127         switch (errcode) {
 128         case ERROR_SHARING_VIOLATION:
 129         case ERROR_ACCESS_DENIED:
 130                 return 1;
 131         }
 132
 133         return 0;
 134 }
 135
 136 static int read_yes_no_answer(void)
 137 {
 138         char answer[1024];
 139
 140         if (fgets(answer, sizeof(answer), stdin)) {
 141                 size_t answer_len = strlen(answer);
 142                 int got_full_line = 0, c;
 143
 144                 /* remove the newline */
 145                 if (answer_len >= 2 && answer[answer_len-2] == '\r') {
 146                         answer[answer_len-2] = '\0';
 147                         got_full_line = 1;
 148                 } else if (answer_len >= 1 && answer[answer_len-1] == '\n') {
 149                         answer[answer_len-1] = '\0';
 150                         got_full_line = 1;
 151                 }
 152                 /* flush the buffer in case we did not get the full line */
 153                 if (!got_full_line)
 154                         while ((c = getchar()) != EOF && c != '\n')
 155                                 ;
 156         } else
 157                 /* we could not read, return the
 158                  * default answer which is no */
 159                 return 0;
 160
 161         if (tolower(answer[0]) == 'y' && !answer[1])
 162                 return 1;
 163         if (!strncasecmp(answer, "yes", sizeof(answer)))
 164                 return 1;
 165         if (tolower(answer[0]) == 'n' && !answer[1])
 166                 return 0;
 167         if (!strncasecmp(answer, "no", sizeof(answer)))
 168                 return 0;
 169
 170         /* did not find an answer we understand */
 171         return -1;
 172 }
 173
 174 static int ask_yes_no_if_possible(const char *format, ...)
 175 {
 176         char question[4096];
 177         const char *retry_hook[] = { NULL, NULL, NULL };
 178         va_list args;
 179
 180         va_start(args, format);
 181         vsnprintf(question, sizeof(question), format, args);
 182         va_end(args);
 183
 184         if ((retry_hook[0] = getenv("GIT_ASK_YESNO"))) {
 185                 retry_hook[1] = question;
 186                 return !run_command_v_opt(retry_hook, 0);
 187         }
 188
 189         if (!isatty(_fileno(stdin)) || !isatty(_fileno(stderr)))
 190                 return 0;
 191
 192         while (1) {
 193                 int answer;
 194                 fprintf(stderr, "%s (y/n) ", question);
 195
 196                 if ((answer = read_yes_no_answer()) >= 0)
 197                         return answer;
 198
 199                 fprintf(stderr, "Sorry, I did not understand your answer. "
 200                                 "Please type 'y' or 'n'\n");
 201         }
 202 }
 203
 204 int mingw_unlink(const char *pathname)
 205 {
 206         int ret, tries = 0;
 207         wchar_t wpathname[MAX_PATH];
 208         if (xutftowcs_path(wpathname, pathname) < 0)
 209                 return -1;
 210
 211         /* read-only files cannot be removed */
 212         _wchmod(wpathname, 0666);
 213         while ((ret = _wunlink(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
 214                 if (!is_file_in_use_error(GetLastError()))
 215                         break;
 216                 /*
 217                  * We assume that some other process had the source or
 218                  * destination file open at the wrong moment and retry.
 219                  * In order to give the other process a higher chance to
 220                  * complete its operation, we give up our time slice now.
 221                  * If we have to retry again, we do sleep a bit.
 222                  */
 223                 Sleep(delay[tries]);
 224                 tries++;
 225         }
 226         while (ret == -1 && is_file_in_use_error(GetLastError()) &&
 227                ask_yes_no_if_possible("Unlink of file '%s' failed. "
 228                         "Should I try again?", pathname))
 229                ret = _wunlink(wpathname);
 230         return ret;
 231 }
 232
 233 static int is_dir_empty(const wchar_t *wpath)
 234 {
 235         WIN32_FIND_DATAW findbuf;
 236         HANDLE handle;
 237         wchar_t wbuf[MAX_PATH + 2];
 238         wcscpy(wbuf, wpath);
 239         wcscat(wbuf, L"\\*");
 240         handle = FindFirstFileW(wbuf, &findbuf);
 241         if (handle == INVALID_HANDLE_VALUE)
 242                 return GetLastError() == ERROR_NO_MORE_FILES;
 243
 244         while (!wcscmp(findbuf.cFileName, L".") ||
 245                         !wcscmp(findbuf.cFileName, L".."))
 246                 if (!FindNextFileW(handle, &findbuf)) {
 247                         DWORD err = GetLastError();
 248                         FindClose(handle);
 249                         return err == ERROR_NO_MORE_FILES;
 250                 }
 251         FindClose(handle);
 252         return 0;
 253 }
 254
 255 int mingw_rmdir(const char *pathname)
 256 {
 257         int ret, tries = 0;
 258         wchar_t wpathname[MAX_PATH];
 259         if (xutftowcs_path(wpathname, pathname) < 0)
 260                 return -1;
 261
 262         while ((ret = _wrmdir(wpathname)) == -1 && tries < ARRAY_SIZE(delay)) {
 263                 if (!is_file_in_use_error(GetLastError()))
 264                         errno = err_win_to_posix(GetLastError());
 265                 if (errno != EACCES)
 266                         break;
 267                 if (!is_dir_empty(wpathname)) {
 268                         errno = ENOTEMPTY;
 269                         break;
 270                 }
 271                 /*
 272                  * We assume that some other process had the source or
 273                  * destination file open at the wrong moment and retry.
 274                  * In order to give the other process a higher chance to
 275                  * complete its operation, we give up our time slice now.
 276                  * If we have to retry again, we do sleep a bit.
 277                  */
 278                 Sleep(delay[tries]);
 279                 tries++;
 280         }
 281         while (ret == -1 && errno == EACCES && is_file_in_use_error(GetLastError()) &&
 282                ask_yes_no_if_possible("Deletion of directory '%s' failed. "
 283                         "Should I try again?", pathname))
 284                ret = _wrmdir(wpathname);
 285         return ret;
 286 }
 287
 288 static int make_hidden(const wchar_t *path)
 289 {
 290         DWORD attribs = GetFileAttributesW(path);
 291         if (SetFileAttributesW(path, FILE_ATTRIBUTE_HIDDEN | attribs))
 292                 return 0;
 293         errno = err_win_to_posix(GetLastError());
 294         return -1;
 295 }
 296
 297 void mingw_mark_as_git_dir(const char *dir)
 298 {
 299         wchar_t wdir[MAX_PATH];
 300         if (hide_dotfiles != HIDE_DOTFILES_FALSE && !is_bare_repository())
 301                 if (xutftowcs_path(wdir, dir) < 0 || make_hidden(wdir))
 302                         warning("Failed to make '%s' hidden", dir);
 303         git_config_set("core.hideDotFiles",
 304                 hide_dotfiles == HIDE_DOTFILES_FALSE ? "false" :
 305                 (hide_dotfiles == HIDE_DOTFILES_DOTGITONLY ?
 306                  "dotGitOnly" : "true"));
 307 }
 308
 309 int mingw_mkdir(const char *path, int mode)
 310 {
 311         int ret;
 312         wchar_t wpath[MAX_PATH];
 313         if (xutftowcs_path(wpath, path) < 0)
 314                 return -1;
 315         ret = _wmkdir(wpath);
 316         if (!ret && hide_dotfiles == HIDE_DOTFILES_TRUE) {
 317                 /*
 318                  * In Windows a file or dir starting with a dot is not
 319                  * automatically hidden. So lets mark it as hidden when
 320                  * such a directory is created.
 321                  */
 322                 const char *start = basename((char*)path);
 323                 if (*start == '.')
 324                         return make_hidden(wpath);
 325         }
 326         return ret;
 327 }
 328
 329 int mingw_open (const char *filename, int oflags, ...)
 330 {
 331         va_list args;
 332         unsigned mode;
 333         int fd;
 334         wchar_t wfilename[MAX_PATH];
 335
 336         va_start(args, oflags);
 337         mode = va_arg(args, int);
 338         va_end(args);
 339
 340         if (filename && !strcmp(filename, "/dev/null"))
 341                 filename = "nul";
 342
 343         if (xutftowcs_path(wfilename, filename) < 0)
 344                 return -1;
 345         fd = _wopen(wfilename, oflags, mode);
 346
 347         if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
 348                 DWORD attrs = GetFileAttributesW(wfilename);
 349                 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
 350                         errno = EISDIR;
 351         }
 352         if ((oflags & O_CREAT) && fd >= 0 &&
 353             hide_dotfiles == HIDE_DOTFILES_TRUE) {
 354                 /*
 355                  * In Windows a file or dir starting with a dot is not
 356                  * automatically hidden. So lets mark it as hidden when
 357                  * such a file is created.
 358                  */
 359                 const char *start = basename((char*)filename);
 360                 if (*start == '.' && make_hidden(wfilename))
 361                         warning("Could not mark '%s' as hidden.", filename);
 362         }
 363         return fd;
 364 }
 365
 366 #undef write
 367 ssize_t mingw_write(int fd, const void *buf, size_t count)
 368 {
 369         /*
 370          * While write() calls to a file on a local disk are translated
 371          * into WriteFile() calls with a maximum size of 64KB on Windows
 372          * XP and 256KB on Vista, no such cap is placed on writes to
 373          * files over the network on Windows XP.  Unfortunately, there
 374          * seems to be a limit of 32MB-28KB on X64 and 64MB-32KB on x86;
 375          * bigger writes fail on Windows XP.
 376          * So we cap to a nice 31MB here to avoid write failures over
 377          * the net without changing the number of WriteFile() calls in
 378          * the local case.
 379          */
 380         return write(fd, buf, min(count, 31 * 1024 * 1024));
 381 }
 382
 383 static BOOL WINAPI ctrl_ignore(DWORD type)
 384 {
 385         return TRUE;
 386 }
 387
 388 #undef fgetc
 389 int mingw_fgetc(FILE *stream)
 390 {
 391         int ch;
 392         if (!isatty(_fileno(stream)))
 393                 return fgetc(stream);
 394
 395         SetConsoleCtrlHandler(ctrl_ignore, TRUE);
 396         while (1) {
 397                 ch = fgetc(stream);
 398                 if (ch != EOF || GetLastError() != ERROR_OPERATION_ABORTED)
 399                         break;
 400
 401                 /* Ctrl+C was pressed, simulate SIGINT and retry */
 402                 mingw_raise(SIGINT);
 403         }
 404         SetConsoleCtrlHandler(ctrl_ignore, FALSE);
 405         return ch;
 406 }
 407
 408 #undef fopen
 409 FILE *mingw_fopen (const char *filename, const char *otype)
 410 {
 411         int hide = 0;
 412         FILE *file;
 413         wchar_t wfilename[MAX_PATH], wotype[4];
 414         if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
 415             basename((char*)filename)[0] == '.')
 416                 hide = access(filename, F_OK);
 417         if (filename && !strcmp(filename, "/dev/null"))
 418                 filename = "nul";
 419         if (xutftowcs_path(wfilename, filename) < 0 ||
 420                 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
 421                 return NULL;
 422         file = _wfopen(wfilename, wotype);
 423         if (file && hide && make_hidden(wfilename))
 424                 warning("Could not mark '%s' as hidden.", filename);
 425         return file;
 426 }
 427
 428 FILE *mingw_freopen (const char *filename, const char *otype, FILE *stream)
 429 {
 430         int hide = 0;
 431         FILE *file;
 432         wchar_t wfilename[MAX_PATH], wotype[4];
 433         if (hide_dotfiles == HIDE_DOTFILES_TRUE &&
 434             basename((char*)filename)[0] == '.')
 435                 hide = access(filename, F_OK);
 436         if (filename && !strcmp(filename, "/dev/null"))
 437                 filename = "nul";
 438         if (xutftowcs_path(wfilename, filename) < 0 ||
 439                 xutftowcs(wotype, otype, ARRAY_SIZE(wotype)) < 0)
 440                 return NULL;
 441         file = _wfreopen(wfilename, wotype, stream);
 442         if (file && hide && make_hidden(wfilename))
 443                 warning("Could not mark '%s' as hidden.", filename);
 444         return file;
 445 }
 446
 447 #undef fflush
 448 int mingw_fflush(FILE *stream)
 449 {
 450         int ret = fflush(stream);
 451
 452         /*
 453          * write() is used behind the scenes of stdio output functions.
 454          * Since git code does not check for errors after each stdio write
 455          * operation, it can happen that write() is called by a later
 456          * stdio function even if an earlier write() call failed. In the
 457          * case of a pipe whose readable end was closed, only the first
 458          * call to write() reports EPIPE on Windows. Subsequent write()
 459          * calls report EINVAL. It is impossible to notice whether this
 460          * fflush invocation triggered such a case, therefore, we have to
 461          * catch all EINVAL errors whole-sale.
 462          */
 463         if (ret && errno == EINVAL)
 464                 errno = EPIPE;
 465
 466         return ret;
 467 }
 468
 469 int mingw_access(const char *filename, int mode)
 470 {
 471         wchar_t wfilename[MAX_PATH];
 472         if (xutftowcs_path(wfilename, filename) < 0)
 473                 return -1;
 474         /* X_OK is not supported by the MSVCRT version */
 475         return _waccess(wfilename, mode & ~X_OK);
 476 }
 477
 478 int mingw_chdir(const char *dirname)
 479 {
 480         wchar_t wdirname[MAX_PATH];
 481         if (xutftowcs_path(wdirname, dirname) < 0)
 482                 return -1;
 483         return _wchdir(wdirname);
 484 }
 485
 486 int mingw_chmod(const char *filename, int mode)
 487 {
 488         wchar_t wfilename[MAX_PATH];
 489         if (xutftowcs_path(wfilename, filename) < 0)
 490                 return -1;
 491         return _wchmod(wfilename, mode);
 492 }
 493
 494 /*
 495  * The unit of FILETIME is 100-nanoseconds since January 1, 1601, UTC.
 496  * Returns the 100-nanoseconds ("hekto nanoseconds") since the epoch.
 497  */
 498 static inline long long filetime_to_hnsec(const FILETIME *ft)
 499 {
 500         long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
 501         /* Windows to Unix Epoch conversion */
 502         return winTime - 116444736000000000LL;
 503 }
 504
 505 static inline time_t filetime_to_time_t(const FILETIME *ft)
 506 {
 507         return (time_t)(filetime_to_hnsec(ft) / 10000000);
 508 }
 509
 510 /* We keep the do_lstat code in a separate function to avoid recursion.
 511  * When a path ends with a slash, the stat will fail with ENOENT. In
 512  * this case, we strip the trailing slashes and stat again.
 513  *
 514  * If follow is true then act like stat() and report on the link
 515  * target. Otherwise report on the link itself.
 516  */
 517 static int do_lstat(int follow, const char *file_name, struct stat *buf)
 518 {
 519         WIN32_FILE_ATTRIBUTE_DATA fdata;
 520         wchar_t wfilename[MAX_PATH];
 521         if (xutftowcs_path(wfilename, file_name) < 0)
 522                 return -1;
 523
 524         if (GetFileAttributesExW(wfilename, GetFileExInfoStandard, &fdata)) {
 525                 buf->st_ino = 0;
 526                 buf->st_gid = 0;
 527                 buf->st_uid = 0;
 528                 buf->st_nlink = 1;
 529                 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
 530                 buf->st_size = fdata.nFileSizeLow |
 531                         (((off_t)fdata.nFileSizeHigh)<<32);
 532                 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
 533                 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
 534                 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
 535                 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
 536                 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
 537                         WIN32_FIND_DATAW findbuf;
 538                         HANDLE handle = FindFirstFileW(wfilename, &findbuf);
 539                         if (handle != INVALID_HANDLE_VALUE) {
 540                                 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
 541                                                 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
 542                                         if (follow) {
 543                                                 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
 544                                                 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
 545                                         } else {
 546                                                 buf->st_mode = S_IFLNK;
 547                                         }
 548                                         buf->st_mode |= S_IREAD;
 549                                         if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
 550                                                 buf->st_mode |= S_IWRITE;
 551                                 }
 552                                 FindClose(handle);
 553                         }
 554                 }
 555                 return 0;
 556         }
 557         switch (GetLastError()) {
 558         case ERROR_ACCESS_DENIED:
 559         case ERROR_SHARING_VIOLATION:
 560         case ERROR_LOCK_VIOLATION:
 561         case ERROR_SHARING_BUFFER_EXCEEDED:
 562                 errno = EACCES;
 563                 break;
 564         case ERROR_BUFFER_OVERFLOW:
 565                 errno = ENAMETOOLONG;
 566                 break;
 567         case ERROR_NOT_ENOUGH_MEMORY:
 568                 errno = ENOMEM;
 569                 break;
 570         default:
 571                 errno = ENOENT;
 572                 break;
 573         }
 574         return -1;
 575 }
 576
 577 /* We provide our own lstat/fstat functions, since the provided
 578  * lstat/fstat functions are so slow. These stat functions are
 579  * tailored for Git's usage (read: fast), and are not meant to be
 580  * complete. Note that Git stat()s are redirected to mingw_lstat()
 581  * too, since Windows doesn't really handle symlinks that well.
 582  */
 583 static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
 584 {
 585         int namelen;
 586         char alt_name[PATH_MAX];
 587
 588         if (!do_lstat(follow, file_name, buf))
 589                 return 0;
 590
 591         /* if file_name ended in a '/', Windows returned ENOENT;
 592          * try again without trailing slashes
 593          */
 594         if (errno != ENOENT)
 595                 return -1;
 596
 597         namelen = strlen(file_name);
 598         if (namelen && file_name[namelen-1] != '/')
 599                 return -1;
 600         while (namelen && file_name[namelen-1] == '/')
 601                 --namelen;
 602         if (!namelen || namelen >= PATH_MAX)
 603                 return -1;
 604
 605         memcpy(alt_name, file_name, namelen);
 606         alt_name[namelen] = 0;
 607         return do_lstat(follow, alt_name, buf);
 608 }
 609
 610 int mingw_lstat(const char *file_name, struct stat *buf)
 611 {
 612         return do_stat_internal(0, file_name, buf);
 613 }
 614 int mingw_stat(const char *file_name, struct stat *buf)
 615 {
 616         return do_stat_internal(1, file_name, buf);
 617 }
 618
 619 #undef fstat
 620 int mingw_fstat(int fd, struct stat *buf)
 621 {
 622         HANDLE fh = (HANDLE)_get_osfhandle(fd);
 623         BY_HANDLE_FILE_INFORMATION fdata;
 624
 625         if (fh == INVALID_HANDLE_VALUE) {
 626                 errno = EBADF;
 627                 return -1;
 628         }
 629         /* direct non-file handles to MS's fstat() */
 630         if (GetFileType(fh) != FILE_TYPE_DISK)
 631                 return _fstati64(fd, buf);
 632
 633         if (GetFileInformationByHandle(fh, &fdata)) {
 634                 buf->st_ino = 0;
 635                 buf->st_gid = 0;
 636                 buf->st_uid = 0;
 637                 buf->st_nlink = 1;
 638                 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
 639                 buf->st_size = fdata.nFileSizeLow |
 640                         (((off_t)fdata.nFileSizeHigh)<<32);
 641                 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
 642                 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
 643                 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
 644                 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
 645                 return 0;
 646         }
 647         errno = EBADF;
 648         return -1;
 649 }
 650
 651 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
 652 {
 653         long long winTime = t * 10000000LL + 116444736000000000LL;
 654         ft->dwLowDateTime = winTime;
 655         ft->dwHighDateTime = winTime >> 32;
 656 }
 657
 658 int mingw_utime (const char *file_name, const struct utimbuf *times)
 659 {
 660         FILETIME mft, aft;
 661         int fh, rc;
 662         DWORD attrs;
 663         wchar_t wfilename[MAX_PATH];
 664         if (xutftowcs_path(wfilename, file_name) < 0)
 665                 return -1;
 666
 667         /* must have write permission */
 668         attrs = GetFileAttributesW(wfilename);
 669         if (attrs != INVALID_FILE_ATTRIBUTES &&
 670             (attrs & FILE_ATTRIBUTE_READONLY)) {
 671                 /* ignore errors here; open() will report them */
 672                 SetFileAttributesW(wfilename, attrs & ~FILE_ATTRIBUTE_READONLY);
 673         }
 674
 675         if ((fh = _wopen(wfilename, O_RDWR | O_BINARY)) < 0) {
 676                 rc = -1;
 677                 goto revert_attrs;
 678         }
 679
 680         if (times) {
 681                 time_t_to_filetime(times->modtime, &mft);
 682                 time_t_to_filetime(times->actime, &aft);
 683         } else {
 684                 GetSystemTimeAsFileTime(&mft);
 685                 aft = mft;
 686         }
 687         if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
 688                 errno = EINVAL;
 689                 rc = -1;
 690         } else
 691                 rc = 0;
 692         close(fh);
 693
 694 revert_attrs:
 695         if (attrs != INVALID_FILE_ATTRIBUTES &&
 696             (attrs & FILE_ATTRIBUTE_READONLY)) {
 697                 /* ignore errors again */
 698                 SetFileAttributesW(wfilename, attrs);
 699         }
 700         return rc;
 701 }
 702
 703 unsigned int sleep (unsigned int seconds)
 704 {
 705         Sleep(seconds*1000);
 706         return 0;
 707 }
 708
 709 char *mingw_mktemp(char *template)
 710 {
 711         wchar_t wtemplate[MAX_PATH];
 712         if (xutftowcs_path(wtemplate, template) < 0)
 713                 return NULL;
 714         if (!_wmktemp(wtemplate))
 715                 return NULL;
 716         if (xwcstoutf(template, wtemplate, strlen(template) + 1) < 0)
 717                 return NULL;
 718         return template;
 719 }
 720
 721 int mkstemp(char *template)
 722 {
 723         char *filename = mktemp(template);
 724         if (filename == NULL)
 725                 return -1;
 726         return open(filename, O_RDWR | O_CREAT, 0600);
 727 }
 728
 729 int gettimeofday(struct timeval *tv, void *tz)
 730 {
 731         FILETIME ft;
 732         long long hnsec;
 733
 734         GetSystemTimeAsFileTime(&ft);
 735         hnsec = filetime_to_hnsec(&ft);
 736         tv->tv_sec = hnsec / 10000000;
 737         tv->tv_usec = (hnsec % 10000000) / 10;
 738         return 0;
 739 }
 740
 741 int pipe(int filedes[2])
 742 {
 743         HANDLE h[2];
 744
 745         /* this creates non-inheritable handles */
 746         if (!CreatePipe(&h[0], &h[1], NULL, 8192)) {
 747                 errno = err_win_to_posix(GetLastError());
 748                 return -1;
 749         }
 750         filedes[0] = _open_osfhandle((int)h[0], O_NOINHERIT);
 751         if (filedes[0] < 0) {
 752                 CloseHandle(h[0]);
 753                 CloseHandle(h[1]);
 754                 return -1;
 755         }
 756         filedes[1] = _open_osfhandle((int)h[1], O_NOINHERIT);
 757         if (filedes[0] < 0) {
 758                 close(filedes[0]);
 759                 CloseHandle(h[1]);
 760                 return -1;
 761         }
 762         return 0;
 763 }
 764
 765 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 766 {
 767         /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
 768         memcpy(result, gmtime(timep), sizeof(struct tm));
 769         return result;
 770 }
 771
 772 struct tm *localtime_r(const time_t *timep, struct tm *result)
 773 {
 774         /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
 775         memcpy(result, localtime(timep), sizeof(struct tm));
 776         return result;
 777 }
 778
 779 char *mingw_getcwd(char *pointer, int len)
 780 {
 781         int i;
 782         wchar_t wpointer[MAX_PATH];
 783         if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
 784                 return NULL;
 785         if (xwcstoutf(pointer, wpointer, len) < 0)
 786                 return NULL;
 787         for (i = 0; pointer[i]; i++)
 788                 if (pointer[i] == '\\')
 789                         pointer[i] = '/';
 790         return pointer;
 791 }
 792
 793 /*
 794  * Compare environment entries by key (i.e. stopping at '=' or '\0').
 795  */
 796 static int compareenv(const void *v1, const void *v2)
 797 {
 798         const char *e1 = *(const char**)v1;
 799         const char *e2 = *(const char**)v2;
 800
 801         for (;;) {
 802                 int c1 = *e1++;
 803                 int c2 = *e2++;
 804                 c1 = (c1 == '=') ? 0 : tolower(c1);
 805                 c2 = (c2 == '=') ? 0 : tolower(c2);
 806                 if (c1 > c2)
 807                         return 1;
 808                 if (c1 < c2)
 809                         return -1;
 810                 if (c1 == 0)
 811                         return 0;
 812         }
 813 }
 814
 815 static int bsearchenv(char **env, const char *name, size_t size)
 816 {
 817         unsigned low = 0, high = size;
 818         while (low < high) {
 819                 unsigned mid = low + ((high - low) >> 1);
 820                 int cmp = compareenv(&env[mid], &name);
 821                 if (cmp < 0)
 822                         low = mid + 1;
 823                 else if (cmp > 0)
 824                         high = mid;
 825                 else
 826                         return mid;
 827         }
 828         return ~low; /* not found, return 1's complement of insert position */
 829 }
 830
 831 /*
 832  * If name contains '=', then sets the variable, otherwise it unsets it
 833  * Size includes the terminating NULL. Env must have room for size + 1 entries
 834  * (in case of insert). Returns the new size. Optionally frees removed entries.
 835  */
 836 static int do_putenv(char **env, const char *name, int size, int free_old)
 837 {
 838         int i = bsearchenv(env, name, size - 1);
 839
 840         /* optionally free removed / replaced entry */
 841         if (i >= 0 && free_old)
 842                 free(env[i]);
 843
 844         if (strchr(name, '=')) {
 845                 /* if new value ('key=value') is specified, insert or replace entry */
 846                 if (i < 0) {
 847                         i = ~i;
 848                         memmove(&env[i + 1], &env[i], (size - i) * sizeof(char*));
 849                         size++;
 850                 }
 851                 env[i] = (char*) name;
 852         } else if (i >= 0) {
 853                 /* otherwise ('key') remove existing entry */
 854                 size--;
 855                 memmove(&env[i], &env[i + 1], (size - i) * sizeof(char*));
 856         }
 857         return size;
 858 }
 859
 860 /* used number of elements of environ array, including terminating NULL */
 861 static int environ_size = 0;
 862 /* allocated size of environ array, in bytes */
 863 static int environ_alloc = 0;
 864
 865 char *mingw_getenv(const char *name)
 866 {
 867         char *value;
 868         int pos = bsearchenv(environ, name, environ_size - 1);
 869         if (pos < 0)
 870                 return NULL;
 871         value = strchr(environ[pos], '=');
 872         return value ? &value[1] : NULL;
 873 }
 874
 875 int mingw_putenv(const char *namevalue)
 876 {
 877         ALLOC_GROW(environ, (environ_size + 1) * sizeof(char*), environ_alloc);
 878         environ_size = do_putenv(environ, namevalue, environ_size, 1);
 879         return 0;
 880 }
 881
 882 /*
 883  * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
 884  * (Parsing C++ Command-Line Arguments)
 885  */
 886 static const char *quote_arg(const char *arg)
 887 {
 888         /* count chars to quote */
 889         int len = 0, n = 0;
 890         int force_quotes = 0;
 891         char *q, *d;
 892         const char *p = arg;
 893         if (!*p) force_quotes = 1;
 894         while (*p) {
 895                 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
 896                         force_quotes = 1;
 897                 else if (*p == '"')
 898                         n++;
 899                 else if (*p == '\\') {
 900                         int count = 0;
 901                         while (*p == '\\') {
 902                                 count++;
 903                                 p++;
 904                                 len++;
 905                         }
 906                         if (*p == '"')
 907                                 n += count*2 + 1;
 908                         continue;
 909                 }
 910                 len++;
 911                 p++;
 912         }
 913         if (!force_quotes && n == 0)
 914                 return arg;
 915
 916         /* insert \ where necessary */
 917         d = q = xmalloc(len+n+3);
 918         *d++ = '"';
 919         while (*arg) {
 920                 if (*arg == '"')
 921                         *d++ = '\\';
 922                 else if (*arg == '\\') {
 923                         int count = 0;
 924                         while (*arg == '\\') {
 925                                 count++;
 926                                 *d++ = *arg++;
 927                         }
 928                         if (*arg == '"') {
 929                                 while (count-- > 0)
 930                                         *d++ = '\\';
 931                                 *d++ = '\\';
 932                         }
 933                 }
 934                 *d++ = *arg++;
 935         }
 936         *d++ = '"';
 937         *d++ = 0;
 938         return q;
 939 }
 940
 941 static const char *parse_interpreter(const char *cmd)
 942 {
 943         static char buf[100];
 944         char *p, *opt;
 945         int n, fd;
 946
 947         /* don't even try a .exe */
 948         n = strlen(cmd);
 949         if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
 950                 return NULL;
 951
 952         fd = open(cmd, O_RDONLY);
 953         if (fd < 0)
 954                 return NULL;
 955         n = read(fd, buf, sizeof(buf)-1);
 956         close(fd);
 957         if (n < 4)      /* at least '#!/x' and not error */
 958                 return NULL;
 959
 960         if (buf[0] != '#' || buf[1] != '!')
 961                 return NULL;
 962         buf[n] = '\0';
 963         p = buf + strcspn(buf, "\r\n");
 964         if (!*p)
 965                 return NULL;
 966
 967         *p = '\0';
 968         if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
 969                 return NULL;
 970         /* strip options */
 971         if ((opt = strchr(p+1, ' ')))
 972                 *opt = '\0';
 973         return p+1;
 974 }
 975
 976 /*
 977  * Splits the PATH into parts.
 978  */
 979 static char **get_path_split(void)
 980 {
 981         char *p, **path, *envpath = getenv("PATH");
 982         int i, n = 0;
 983
 984         if (!envpath || !*envpath)
 985                 return NULL;
 986
 987         envpath = xstrdup(envpath);
 988         p = envpath;
 989         while (p) {
 990                 char *dir = p;
 991                 p = strchr(p, ';');
 992                 if (p) *p++ = '\0';
 993                 if (*dir) {     /* not earlier, catches series of ; */
 994                         ++n;
 995                 }
 996         }
 997         if (!n)
 998                 return NULL;
 999
1000         path = xmalloc((n+1)*sizeof(char *));
1001         p = envpath;
1002         i = 0;
1003         do {
1004                 if (*p)
1005                         path[i++] = xstrdup(p);
1006                 p = p+strlen(p)+1;
1007         } while (i < n);
1008         path[i] = NULL;
1009
1010         free(envpath);
1011
1012         return path;
1013 }
1014
1015 static void free_path_split(char **path)
1016 {
1017         char **p = path;
1018
1019         if (!path)
1020                 return;
1021
1022         while (*p)
1023                 free(*p++);
1024         free(path);
1025 }
1026
1027 /*
1028  * exe_only means that we only want to detect .exe files, but not scripts
1029  * (which do not have an extension)
1030  */
1031 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
1032 {
1033         char path[MAX_PATH];
1034         wchar_t wpath[MAX_PATH];
1035         snprintf(path, sizeof(path), "%s\\%s.exe", dir, cmd);
1036
1037         if (xutftowcs_path(wpath, path) < 0)
1038                 return NULL;
1039
1040         if (!isexe && _waccess(wpath, F_OK) == 0)
1041                 return xstrdup(path);
1042         path[strlen(path)-4] = '\0';
1043         if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
1044
1045                 if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY))
1046                         return xstrdup(path);
1047         }
1048         return NULL;
1049 }
1050
1051 /*
1052  * Determines the absolute path of cmd using the split path in path.
1053  * If cmd contains a slash or backslash, no lookup is performed.
1054  */
1055 static char *path_lookup(const char *cmd, char **path, int exe_only)
1056 {
1057         char *prog = NULL;
1058         int len = strlen(cmd);
1059         int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1060
1061         if (strchr(cmd, '/') || strchr(cmd, '\\'))
1062                 prog = xstrdup(cmd);
1063
1064         while (!prog && *path)
1065                 prog = lookup_prog(*path++, cmd, isexe, exe_only);
1066
1067         return prog;
1068 }
1069
1070 /*
1071  * Create environment block suitable for CreateProcess. Merges current
1072  * process environment and the supplied environment changes.
1073  */
1074 static wchar_t *make_environment_block(char **deltaenv)
1075 {
1076         wchar_t *wenvblk = NULL;
1077         char **tmpenv;
1078         int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1079
1080         while (deltaenv && deltaenv[i])
1081                 i++;
1082
1083         /* copy the environment, leaving space for changes */
1084         tmpenv = xmalloc((size + i) * sizeof(char*));
1085         memcpy(tmpenv, environ, size * sizeof(char*));
1086
1087         /* merge supplied environment changes into the temporary environment */
1088         for (i = 0; deltaenv && deltaenv[i]; i++)
1089                 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1090
1091         /* create environment block from temporary environment */
1092         for (i = 0; tmpenv[i]; i++) {
1093                 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1094                 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1095                 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1096         }
1097         /* add final \0 terminator */
1098         wenvblk[wenvpos] = 0;
1099         free(tmpenv);
1100         return wenvblk;
1101 }
1102
1103 struct pinfo_t {
1104         struct pinfo_t *next;
1105         pid_t pid;
1106         HANDLE proc;
1107 } pinfo_t;
1108 struct pinfo_t *pinfo = NULL;
1109 CRITICAL_SECTION pinfo_cs;
1110
1111 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1112                               const char *dir,
1113                               int prepend_cmd, int fhin, int fhout, int fherr)
1114 {
1115         STARTUPINFOW si;
1116         PROCESS_INFORMATION pi;
1117         struct strbuf args;
1118         wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1119         unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1120         BOOL ret;
1121
1122         /* Determine whether or not we are associated to a console */
1123         HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1124                         FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1125                         FILE_ATTRIBUTE_NORMAL, NULL);
1126         if (cons == INVALID_HANDLE_VALUE) {
1127                 /* There is no console associated with this process.
1128                  * Since the child is a console process, Windows
1129                  * would normally create a console window. But
1130                  * since we'll be redirecting std streams, we do
1131                  * not need the console.
1132                  * It is necessary to use DETACHED_PROCESS
1133                  * instead of CREATE_NO_WINDOW to make ssh
1134                  * recognize that it has no console.
1135                  */
1136                 flags |= DETACHED_PROCESS;
1137         } else {
1138                 /* There is already a console. If we specified
1139                  * DETACHED_PROCESS here, too, Windows would
1140                  * disassociate the child from the console.
1141                  * The same is true for CREATE_NO_WINDOW.
1142                  * Go figure!
1143                  */
1144                 CloseHandle(cons);
1145         }
1146         memset(&si, 0, sizeof(si));
1147         si.cb = sizeof(si);
1148         si.dwFlags = STARTF_USESTDHANDLES;
1149         si.hStdInput = winansi_get_osfhandle(fhin);
1150         si.hStdOutput = winansi_get_osfhandle(fhout);
1151         si.hStdError = winansi_get_osfhandle(fherr);
1152
1153         if (xutftowcs_path(wcmd, cmd) < 0)
1154                 return -1;
1155         if (dir && xutftowcs_path(wdir, dir) < 0)
1156                 return -1;
1157
1158         /* concatenate argv, quoting args as we go */
1159         strbuf_init(&args, 0);
1160         if (prepend_cmd) {
1161                 char *quoted = (char *)quote_arg(cmd);
1162                 strbuf_addstr(&args, quoted);
1163                 if (quoted != cmd)
1164                         free(quoted);
1165         }
1166         for (; *argv; argv++) {
1167                 char *quoted = (char *)quote_arg(*argv);
1168                 if (*args.buf)
1169                         strbuf_addch(&args, ' ');
1170                 strbuf_addstr(&args, quoted);
1171                 if (quoted != *argv)
1172                         free(quoted);
1173         }
1174
1175         wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1176         xutftowcs(wargs, args.buf, 2 * args.len + 1);
1177         strbuf_release(&args);
1178
1179         wenvblk = make_environment_block(deltaenv);
1180
1181         memset(&pi, 0, sizeof(pi));
1182         ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1183                 wenvblk, dir ? wdir : NULL, &si, &pi);
1184
1185         free(wenvblk);
1186         free(wargs);
1187
1188         if (!ret) {
1189                 errno = ENOENT;
1190                 return -1;
1191         }
1192         CloseHandle(pi.hThread);
1193
1194         /*
1195          * The process ID is the human-readable identifier of the process
1196          * that we want to present in log and error messages. The handle
1197          * is not useful for this purpose. But we cannot close it, either,
1198          * because it is not possible to turn a process ID into a process
1199          * handle after the process terminated.
1200          * Keep the handle in a list for waitpid.
1201          */
1202         EnterCriticalSection(&pinfo_cs);
1203         {
1204                 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1205                 info->pid = pi.dwProcessId;
1206                 info->proc = pi.hProcess;
1207                 info->next = pinfo;
1208                 pinfo = info;
1209         }
1210         LeaveCriticalSection(&pinfo_cs);
1211
1212         return (pid_t)pi.dwProcessId;
1213 }
1214
1215 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1216 {
1217         return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1218 }
1219
1220 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1221                      const char *dir,
1222                      int fhin, int fhout, int fherr)
1223 {
1224         pid_t pid;
1225         char **path = get_path_split();
1226         char *prog = path_lookup(cmd, path, 0);
1227
1228         if (!prog) {
1229                 errno = ENOENT;
1230                 pid = -1;
1231         }
1232         else {
1233                 const char *interpr = parse_interpreter(prog);
1234
1235                 if (interpr) {
1236                         const char *argv0 = argv[0];
1237                         char *iprog = path_lookup(interpr, path, 1);
1238                         argv[0] = prog;
1239                         if (!iprog) {
1240                                 errno = ENOENT;
1241                                 pid = -1;
1242                         }
1243                         else {
1244                                 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1245                                                        fhin, fhout, fherr);
1246                                 free(iprog);
1247                         }
1248                         argv[0] = argv0;
1249                 }
1250                 else
1251                         pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1252                                                fhin, fhout, fherr);
1253                 free(prog);
1254         }
1255         free_path_split(path);
1256         return pid;
1257 }
1258
1259 static int try_shell_exec(const char *cmd, char *const *argv)
1260 {
1261         const char *interpr = parse_interpreter(cmd);
1262         char **path;
1263         char *prog;
1264         int pid = 0;
1265
1266         if (!interpr)
1267                 return 0;
1268         path = get_path_split();
1269         prog = path_lookup(interpr, path, 1);
1270         if (prog) {
1271                 int argc = 0;
1272                 const char **argv2;
1273                 while (argv[argc]) argc++;
1274                 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1275                 argv2[0] = (char *)cmd; /* full path to the script file */
1276                 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1277                 pid = mingw_spawnv(prog, argv2, 1);
1278                 if (pid >= 0) {
1279                         int status;
1280                         if (waitpid(pid, &status, 0) < 0)
1281                                 status = 255;
1282                         exit(status);
1283                 }
1284                 pid = 1;        /* indicate that we tried but failed */
1285                 free(prog);
1286                 free(argv2);
1287         }
1288         free_path_split(path);
1289         return pid;
1290 }
1291
1292 int mingw_execv(const char *cmd, char *const *argv)
1293 {
1294         /* check if git_command is a shell script */
1295         if (!try_shell_exec(cmd, argv)) {
1296                 int pid, status;
1297
1298                 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1299                 if (pid < 0)
1300                         return -1;
1301                 if (waitpid(pid, &status, 0) < 0)
1302                         status = 255;
1303                 exit(status);
1304         }
1305         return -1;
1306 }
1307
1308 int mingw_execvp(const char *cmd, char *const *argv)
1309 {
1310         char **path = get_path_split();
1311         char *prog = path_lookup(cmd, path, 0);
1312
1313         if (prog) {
1314                 mingw_execv(prog, argv);
1315                 free(prog);
1316         } else
1317                 errno = ENOENT;
1318
1319         free_path_split(path);
1320         return -1;
1321 }
1322
1323 int mingw_kill(pid_t pid, int sig)
1324 {
1325         if (pid > 0 && sig == SIGTERM) {
1326                 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1327
1328                 if (TerminateProcess(h, -1)) {
1329                         CloseHandle(h);
1330                         return 0;
1331                 }
1332
1333                 errno = err_win_to_posix(GetLastError());
1334                 CloseHandle(h);
1335                 return -1;
1336         }
1337
1338         errno = EINVAL;
1339         return -1;
1340 }
1341
1342 /*
1343  * Note, this isn't a complete replacement for getaddrinfo. It assumes
1344  * that service contains a numerical port, or that it is null. It
1345  * does a simple search using gethostbyname, and returns one IPv4 host
1346  * if one was found.
1347  */
1348 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1349                                    const struct addrinfo *hints,
1350                                    struct addrinfo **res)
1351 {
1352         struct hostent *h = NULL;
1353         struct addrinfo *ai;
1354         struct sockaddr_in *sin;
1355
1356         if (node) {
1357                 h = gethostbyname(node);
1358                 if (!h)
1359                         return WSAGetLastError();
1360         }
1361
1362         ai = xmalloc(sizeof(struct addrinfo));
1363         *res = ai;
1364         ai->ai_flags = 0;
1365         ai->ai_family = AF_INET;
1366         ai->ai_socktype = hints ? hints->ai_socktype : 0;
1367         switch (ai->ai_socktype) {
1368         case SOCK_STREAM:
1369                 ai->ai_protocol = IPPROTO_TCP;
1370                 break;
1371         case SOCK_DGRAM:
1372                 ai->ai_protocol = IPPROTO_UDP;
1373                 break;
1374         default:
1375                 ai->ai_protocol = 0;
1376                 break;
1377         }
1378         ai->ai_addrlen = sizeof(struct sockaddr_in);
1379         if (hints && (hints->ai_flags & AI_CANONNAME))
1380                 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1381         else
1382                 ai->ai_canonname = NULL;
1383
1384         sin = xmalloc(ai->ai_addrlen);
1385         memset(sin, 0, ai->ai_addrlen);
1386         sin->sin_family = AF_INET;
1387         /* Note: getaddrinfo is supposed to allow service to be a string,
1388          * which should be looked up using getservbyname. This is
1389          * currently not implemented */
1390         if (service)
1391                 sin->sin_port = htons(atoi(service));
1392         if (h)
1393                 sin->sin_addr = *(struct in_addr *)h->h_addr;
1394         else if (hints && (hints->ai_flags & AI_PASSIVE))
1395                 sin->sin_addr.s_addr = INADDR_ANY;
1396         else
1397                 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1398         ai->ai_addr = (struct sockaddr *)sin;
1399         ai->ai_next = 0;
1400         return 0;
1401 }
1402
1403 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1404 {
1405         free(res->ai_canonname);
1406         free(res->ai_addr);
1407         free(res);
1408 }
1409
1410 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1411                                    char *host, DWORD hostlen,
1412                                    char *serv, DWORD servlen, int flags)
1413 {
1414         const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1415         if (sa->sa_family != AF_INET)
1416                 return EAI_FAMILY;
1417         if (!host && !serv)
1418                 return EAI_NONAME;
1419
1420         if (host && hostlen > 0) {
1421                 struct hostent *ent = NULL;
1422                 if (!(flags & NI_NUMERICHOST))
1423                         ent = gethostbyaddr((const char *)&sin->sin_addr,
1424                                             sizeof(sin->sin_addr), AF_INET);
1425
1426                 if (ent)
1427                         snprintf(host, hostlen, "%s", ent->h_name);
1428                 else if (flags & NI_NAMEREQD)
1429                         return EAI_NONAME;
1430                 else
1431                         snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1432         }
1433
1434         if (serv && servlen > 0) {
1435                 struct servent *ent = NULL;
1436                 if (!(flags & NI_NUMERICSERV))
1437                         ent = getservbyport(sin->sin_port,
1438                                             flags & NI_DGRAM ? "udp" : "tcp");
1439
1440                 if (ent)
1441                         snprintf(serv, servlen, "%s", ent->s_name);
1442                 else
1443                         snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1444         }
1445
1446         return 0;
1447 }
1448
1449 static HMODULE ipv6_dll = NULL;
1450 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1451 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1452                                       const struct addrinfo *hints,
1453                                       struct addrinfo **res);
1454 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1455                                       char *host, DWORD hostlen,
1456                                       char *serv, DWORD servlen, int flags);
1457 /*
1458  * gai_strerror is an inline function in the ws2tcpip.h header, so we
1459  * don't need to try to load that one dynamically.
1460  */
1461
1462 static void socket_cleanup(void)
1463 {
1464         WSACleanup();
1465         if (ipv6_dll)
1466                 FreeLibrary(ipv6_dll);
1467         ipv6_dll = NULL;
1468         ipv6_freeaddrinfo = freeaddrinfo_stub;
1469         ipv6_getaddrinfo = getaddrinfo_stub;
1470         ipv6_getnameinfo = getnameinfo_stub;
1471 }
1472
1473 static void ensure_socket_initialization(void)
1474 {
1475         WSADATA wsa;
1476         static int initialized = 0;
1477         const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1478         const char **name;
1479
1480         if (initialized)
1481                 return;
1482
1483         if (WSAStartup(MAKEWORD(2,2), &wsa))
1484                 die("unable to initialize winsock subsystem, error %d",
1485                         WSAGetLastError());
1486
1487         for (name = libraries; *name; name++) {
1488                 ipv6_dll = LoadLibrary(*name);
1489                 if (!ipv6_dll)
1490                         continue;
1491
1492                 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1493                         GetProcAddress(ipv6_dll, "freeaddrinfo");
1494                 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1495                                                    const struct addrinfo *,
1496                                                    struct addrinfo **))
1497                         GetProcAddress(ipv6_dll, "getaddrinfo");
1498                 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1499                                                    socklen_t, char *, DWORD,
1500                                                    char *, DWORD, int))
1501                         GetProcAddress(ipv6_dll, "getnameinfo");
1502                 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1503                         FreeLibrary(ipv6_dll);
1504                         ipv6_dll = NULL;
1505                 } else
1506                         break;
1507         }
1508         if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1509                 ipv6_freeaddrinfo = freeaddrinfo_stub;
1510                 ipv6_getaddrinfo = getaddrinfo_stub;
1511                 ipv6_getnameinfo = getnameinfo_stub;
1512         }
1513
1514         atexit(socket_cleanup);
1515         initialized = 1;
1516 }
1517
1518 #undef gethostname
1519 int mingw_gethostname(char *name, int namelen)
1520 {
1521     ensure_socket_initialization();
1522     return gethostname(name, namelen);
1523 }
1524
1525 #undef gethostbyname
1526 struct hostent *mingw_gethostbyname(const char *host)
1527 {
1528         ensure_socket_initialization();
1529         return gethostbyname(host);
1530 }
1531
1532 void mingw_freeaddrinfo(struct addrinfo *res)
1533 {
1534         ipv6_freeaddrinfo(res);
1535 }
1536
1537 int mingw_getaddrinfo(const char *node, const char *service,
1538                       const struct addrinfo *hints, struct addrinfo **res)
1539 {
1540         ensure_socket_initialization();
1541         return ipv6_getaddrinfo(node, service, hints, res);
1542 }
1543
1544 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1545                       char *host, DWORD hostlen, char *serv, DWORD servlen,
1546                       int flags)
1547 {
1548         ensure_socket_initialization();
1549         return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1550 }
1551
1552 int mingw_socket(int domain, int type, int protocol)
1553 {
1554         int sockfd;
1555         SOCKET s;
1556
1557         ensure_socket_initialization();
1558         s = WSASocket(domain, type, protocol, NULL, 0, 0);
1559         if (s == INVALID_SOCKET) {
1560                 /*
1561                  * WSAGetLastError() values are regular BSD error codes
1562                  * biased by WSABASEERR.
1563                  * However, strerror() does not know about networking
1564                  * specific errors, which are values beginning at 38 or so.
1565                  * Therefore, we choose to leave the biased error code
1566                  * in errno so that _if_ someone looks up the code somewhere,
1567                  * then it is at least the number that are usually listed.
1568                  */
1569                 errno = WSAGetLastError();
1570                 return -1;
1571         }
1572         /* convert into a file descriptor */
1573         if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1574                 closesocket(s);
1575                 return error("unable to make a socket file descriptor: %s",
1576                         strerror(errno));
1577         }
1578         return sockfd;
1579 }
1580
1581 #undef connect
1582 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1583 {
1584         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1585         return connect(s, sa, sz);
1586 }
1587
1588 #undef bind
1589 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1590 {
1591         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1592         return bind(s, sa, sz);
1593 }
1594
1595 #undef setsockopt
1596 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1597 {
1598         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1599         return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1600 }
1601
1602 #undef shutdown
1603 int mingw_shutdown(int sockfd, int how)
1604 {
1605         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1606         return shutdown(s, how);
1607 }
1608
1609 #undef listen
1610 int mingw_listen(int sockfd, int backlog)
1611 {
1612         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1613         return listen(s, backlog);
1614 }
1615
1616 #undef accept
1617 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1618 {
1619         int sockfd2;
1620
1621         SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1622         SOCKET s2 = accept(s1, sa, sz);
1623
1624         /* convert into a file descriptor */
1625         if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1626                 int err = errno;
1627                 closesocket(s2);
1628                 return error("unable to make a socket file descriptor: %s",
1629                         strerror(err));
1630         }
1631         return sockfd2;
1632 }
1633
1634 #undef rename
1635 int mingw_rename(const char *pold, const char *pnew)
1636 {
1637         DWORD attrs, gle;
1638         int tries = 0;
1639         wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1640         if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1641                 return -1;
1642
1643         /*
1644          * Try native rename() first to get errno right.
1645          * It is based on MoveFile(), which cannot overwrite existing files.
1646          */
1647         if (!_wrename(wpold, wpnew))
1648                 return 0;
1649         if (errno != EEXIST)
1650                 return -1;
1651 repeat:
1652         if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1653                 return 0;
1654         /* TODO: translate more errors */
1655         gle = GetLastError();
1656         if (gle == ERROR_ACCESS_DENIED &&
1657             (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1658                 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1659                         errno = EISDIR;
1660                         return -1;
1661                 }
1662                 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1663                     SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1664                         if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1665                                 return 0;
1666                         gle = GetLastError();
1667                         /* revert file attributes on failure */
1668                         SetFileAttributesW(wpnew, attrs);
1669                 }
1670         }
1671         if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1672                 /*
1673                  * We assume that some other process had the source or
1674                  * destination file open at the wrong moment and retry.
1675                  * In order to give the other process a higher chance to
1676                  * complete its operation, we give up our time slice now.
1677                  * If we have to retry again, we do sleep a bit.
1678                  */
1679                 Sleep(delay[tries]);
1680                 tries++;
1681                 goto repeat;
1682         }
1683         if (gle == ERROR_ACCESS_DENIED &&
1684                ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1685                        "Should I try again?", pold, pnew))
1686                 goto repeat;
1687
1688         errno = EACCES;
1689         return -1;
1690 }
1691
1692 /*
1693  * Note that this doesn't return the actual pagesize, but
1694  * the allocation granularity. If future Windows specific git code
1695  * needs the real getpagesize function, we need to find another solution.
1696  */
1697 int mingw_getpagesize(void)
1698 {
1699         SYSTEM_INFO si;
1700         GetSystemInfo(&si);
1701         return si.dwAllocationGranularity;
1702 }
1703
1704 struct passwd *getpwuid(int uid)
1705 {
1706         static char user_name[100];
1707         static struct passwd p;
1708
1709         DWORD len = sizeof(user_name);
1710         if (!GetUserName(user_name, &len))
1711                 return NULL;
1712         p.pw_name = user_name;
1713         p.pw_gecos = "unknown";
1714         p.pw_dir = NULL;
1715         return &p;
1716 }
1717
1718 static HANDLE timer_event;
1719 static HANDLE timer_thread;
1720 static int timer_interval;
1721 static int one_shot;
1722 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1723
1724 /* The timer works like this:
1725  * The thread, ticktack(), is a trivial routine that most of the time
1726  * only waits to receive the signal to terminate. The main thread tells
1727  * the thread to terminate by setting the timer_event to the signalled
1728  * state.
1729  * But ticktack() interrupts the wait state after the timer's interval
1730  * length to call the signal handler.
1731  */
1732
1733 static unsigned __stdcall ticktack(void *dummy)
1734 {
1735         while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1736                 mingw_raise(SIGALRM);
1737                 if (one_shot)
1738                         break;
1739         }
1740         return 0;
1741 }
1742
1743 static int start_timer_thread(void)
1744 {
1745         timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1746         if (timer_event) {
1747                 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1748                 if (!timer_thread )
1749                         return errno = ENOMEM,
1750                                 error("cannot start timer thread");
1751         } else
1752                 return errno = ENOMEM,
1753                         error("cannot allocate resources for timer");
1754         return 0;
1755 }
1756
1757 static void stop_timer_thread(void)
1758 {
1759         if (timer_event)
1760                 SetEvent(timer_event);  /* tell thread to terminate */
1761         if (timer_thread) {
1762                 int rc = WaitForSingleObject(timer_thread, 1000);
1763                 if (rc == WAIT_TIMEOUT)
1764                         error("timer thread did not terminate timely");
1765                 else if (rc != WAIT_OBJECT_0)
1766                         error("waiting for timer thread failed: %lu",
1767                               GetLastError());
1768                 CloseHandle(timer_thread);
1769         }
1770         if (timer_event)
1771                 CloseHandle(timer_event);
1772         timer_event = NULL;
1773         timer_thread = NULL;
1774 }
1775
1776 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1777 {
1778         return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1779 }
1780
1781 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1782 {
1783         static const struct timeval zero;
1784         static int atexit_done;
1785
1786         if (out != NULL)
1787                 return errno = EINVAL,
1788                         error("setitimer param 3 != NULL not implemented");
1789         if (!is_timeval_eq(&in->it_interval, &zero) &&
1790             !is_timeval_eq(&in->it_interval, &in->it_value))
1791                 return errno = EINVAL,
1792                         error("setitimer: it_interval must be zero or eq it_value");
1793
1794         if (timer_thread)
1795                 stop_timer_thread();
1796
1797         if (is_timeval_eq(&in->it_value, &zero) &&
1798             is_timeval_eq(&in->it_interval, &zero))
1799                 return 0;
1800
1801         timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1802         one_shot = is_timeval_eq(&in->it_interval, &zero);
1803         if (!atexit_done) {
1804                 atexit(stop_timer_thread);
1805                 atexit_done = 1;
1806         }
1807         return start_timer_thread();
1808 }
1809
1810 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1811 {
1812         if (sig != SIGALRM)
1813                 return errno = EINVAL,
1814                         error("sigaction only implemented for SIGALRM");
1815         if (out != NULL)
1816                 return errno = EINVAL,
1817                         error("sigaction: param 3 != NULL not implemented");
1818
1819         timer_fn = in->sa_handler;
1820         return 0;
1821 }
1822
1823 #undef signal
1824 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1825 {
1826         sig_handler_t old = timer_fn;
1827
1828         switch (sig) {
1829         case SIGALRM:
1830                 timer_fn = handler;
1831                 break;
1832
1833         case SIGINT:
1834                 sigint_fn = handler;
1835                 break;
1836
1837         default:
1838                 return signal(sig, handler);
1839         }
1840
1841         return old;
1842 }
1843
1844 #undef raise
1845 int mingw_raise(int sig)
1846 {
1847         switch (sig) {
1848         case SIGALRM:
1849                 if (timer_fn == SIG_DFL) {
1850                         if (isatty(STDERR_FILENO))
1851                                 fputs("Alarm clock\n", stderr);
1852                         exit(128 + SIGALRM);
1853                 } else if (timer_fn != SIG_IGN)
1854                         timer_fn(SIGALRM);
1855                 return 0;
1856
1857         case SIGINT:
1858                 if (sigint_fn == SIG_DFL)
1859                         exit(128 + SIGINT);
1860                 else if (sigint_fn != SIG_IGN)
1861                         sigint_fn(SIGINT);
1862                 return 0;
1863
1864         default:
1865                 return raise(sig);
1866         }
1867 }
1868
1869
1870 static const char *make_backslash_path(const char *path)
1871 {
1872         static char buf[PATH_MAX + 1];
1873         char *c;
1874
1875         if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1876                 die("Too long path: %.*s", 60, path);
1877
1878         for (c = buf; *c; c++) {
1879                 if (*c == '/')
1880                         *c = '\\';
1881         }
1882         return buf;
1883 }
1884
1885 void mingw_open_html(const char *unixpath)
1886 {
1887         const char *htmlpath = make_backslash_path(unixpath);
1888         typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1889                         const char *, const char *, const char *, INT);
1890         T ShellExecute;
1891         HMODULE shell32;
1892         int r;
1893
1894         shell32 = LoadLibrary("shell32.dll");
1895         if (!shell32)
1896                 die("cannot load shell32.dll");
1897         ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1898         if (!ShellExecute)
1899                 die("cannot run browser");
1900
1901         printf("Launching default browser to display HTML ...\n");
1902         r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1903         FreeLibrary(shell32);
1904         /* see the MSDN documentation referring to the result codes here */
1905         if (r <= 32) {
1906                 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1907         }
1908 }
1909
1910 int link(const char *oldpath, const char *newpath)
1911 {
1912         typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1913         static T create_hard_link = NULL;
1914         wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1915         if (xutftowcs_path(woldpath, oldpath) < 0 ||
1916                 xutftowcs_path(wnewpath, newpath) < 0)
1917                 return -1;
1918
1919         if (!create_hard_link) {
1920                 create_hard_link = (T) GetProcAddress(
1921                         GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1922                 if (!create_hard_link)
1923                         create_hard_link = (T)-1;
1924         }
1925         if (create_hard_link == (T)-1) {
1926                 errno = ENOSYS;
1927                 return -1;
1928         }
1929         if (!create_hard_link(wnewpath, woldpath, NULL)) {
1930                 errno = err_win_to_posix(GetLastError());
1931                 return -1;
1932         }
1933         return 0;
1934 }
1935
1936 pid_t waitpid(pid_t pid, int *status, int options)
1937 {
1938         HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1939             FALSE, pid);
1940         if (!h) {
1941                 errno = ECHILD;
1942                 return -1;
1943         }
1944
1945         if (pid > 0 && options & WNOHANG) {
1946                 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1947                         CloseHandle(h);
1948                         return 0;
1949                 }
1950                 options &= ~WNOHANG;
1951         }
1952
1953         if (options == 0) {
1954                 struct pinfo_t **ppinfo;
1955                 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1956                         CloseHandle(h);
1957                         return 0;
1958                 }
1959
1960                 if (status)
1961                         GetExitCodeProcess(h, (LPDWORD)status);
1962
1963                 EnterCriticalSection(&pinfo_cs);
1964
1965                 ppinfo = &pinfo;
1966                 while (*ppinfo) {
1967                         struct pinfo_t *info = *ppinfo;
1968                         if (info->pid == pid) {
1969                                 CloseHandle(info->proc);
1970                                 *ppinfo = info->next;
1971                                 free(info);
1972                                 break;
1973                         }
1974                         ppinfo = &info->next;
1975                 }
1976
1977                 LeaveCriticalSection(&pinfo_cs);
1978
1979                 CloseHandle(h);
1980                 return pid;
1981         }
1982         CloseHandle(h);
1983
1984         errno = EINVAL;
1985         return -1;
1986 }
1987
1988 const char *get_windows_home_directory(void)
1989 {
1990         static const char *home_directory = NULL;
1991         struct strbuf buf = STRBUF_INIT;
1992
1993         if (home_directory)
1994                 return home_directory;
1995
1996         home_directory = getenv("HOME");
1997         if (home_directory && *home_directory)
1998                 return home_directory;
1999
2000         strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
2001         home_directory = strbuf_detach(&buf, NULL);
2002
2003         return home_directory;
2004 }
2005
2006 int mingw_offset_1st_component(const char *path)
2007 {
2008         int offset = 0;
2009         if (has_dos_drive_prefix(path))
2010                 offset = 2;
2011
2012         /* unc paths */
2013         else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
2014
2015                 /* skip server name */
2016                 char *pos = strpbrk(path + 2, "\\/");
2017                 if (!pos)
2018                         return 0; /* Error: malformed unc path */
2019
2020                 do {
2021                         pos++;
2022                 } while (*pos && !is_dir_sep(*pos));
2023
2024                 offset = pos - path;
2025         }
2026
2027         return offset + is_dir_sep(path[offset]);
2028 }
2029
2030 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2031 {
2032         int upos = 0, wpos = 0;
2033         const unsigned char *utf = (const unsigned char*) utfs;
2034         if (!utf || !wcs || wcslen < 1) {
2035                 errno = EINVAL;
2036                 return -1;
2037         }
2038         /* reserve space for \0 */
2039         wcslen--;
2040         if (utflen < 0)
2041                 utflen = INT_MAX;
2042
2043         while (upos < utflen) {
2044                 int c = utf[upos++] & 0xff;
2045                 if (utflen == INT_MAX && c == 0)
2046                         break;
2047
2048                 if (wpos >= wcslen) {
2049                         wcs[wpos] = 0;
2050                         errno = ERANGE;
2051                         return -1;
2052                 }
2053
2054                 if (c < 0x80) {
2055                         /* ASCII */
2056                         wcs[wpos++] = c;
2057                 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2058                                 (utf[upos] & 0xc0) == 0x80) {
2059                         /* 2-byte utf-8 */
2060                         c = ((c & 0x1f) << 6);
2061                         c |= (utf[upos++] & 0x3f);
2062                         wcs[wpos++] = c;
2063                 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2064                                 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2065                                 (utf[upos] & 0xc0) == 0x80 &&
2066                                 (utf[upos + 1] & 0xc0) == 0x80) {
2067                         /* 3-byte utf-8 */
2068                         c = ((c & 0x0f) << 12);
2069                         c |= ((utf[upos++] & 0x3f) << 6);
2070                         c |= (utf[upos++] & 0x3f);
2071                         wcs[wpos++] = c;
2072                 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2073                                 wpos + 1 < wcslen &&
2074                                 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2075                                 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2076                                 (utf[upos] & 0xc0) == 0x80 &&
2077                                 (utf[upos + 1] & 0xc0) == 0x80 &&
2078                                 (utf[upos + 2] & 0xc0) == 0x80) {
2079                         /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2080                         c = ((c & 0x07) << 18);
2081                         c |= ((utf[upos++] & 0x3f) << 12);
2082                         c |= ((utf[upos++] & 0x3f) << 6);
2083                         c |= (utf[upos++] & 0x3f);
2084                         c -= 0x10000;
2085                         wcs[wpos++] = 0xd800 | (c >> 10);
2086                         wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2087                 } else if (c >= 0xa0) {
2088                         /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2089                         wcs[wpos++] = c;
2090                 } else {
2091                         /* invalid utf-8 byte, non-printable unicode: convert to hex */
2092                         static const char *hex = "0123456789abcdef";
2093                         wcs[wpos++] = hex[c >> 4];
2094                         if (wpos < wcslen)
2095                                 wcs[wpos++] = hex[c & 0x0f];
2096                 }
2097         }
2098         wcs[wpos] = 0;
2099         return wpos;
2100 }
2101
2102 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2103 {
2104         if (!wcs || !utf || utflen < 1) {
2105                 errno = EINVAL;
2106                 return -1;
2107         }
2108         utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2109         if (utflen)
2110                 return utflen - 1;
2111         errno = ERANGE;
2112         return -1;
2113 }
2114
2115 /*
2116  * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2117  * mingw startup code, see init.c in mingw runtime).
2118  */
2119 int _CRT_glob = 0;
2120
2121 typedef struct {
2122         int newmode;
2123 } _startupinfo;
2124
2125 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2126                 _startupinfo *si);
2127
2128 static NORETURN void die_startup()
2129 {
2130         fputs("fatal: not enough memory for initialization", stderr);
2131         exit(128);
2132 }
2133
2134 static void *malloc_startup(size_t size)
2135 {
2136         void *result = malloc(size);
2137         if (!result)
2138                 die_startup();
2139         return result;
2140 }
2141
2142 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2143 {
2144         len = xwcstoutf(buffer, wcs, len) + 1;
2145         return memcpy(malloc_startup(len), buffer, len);
2146 }
2147
2148 void mingw_startup()
2149 {
2150         int i, maxlen, argc;
2151         char *buffer;
2152         wchar_t **wenv, **wargv;
2153         _startupinfo si;
2154
2155         /* get wide char arguments and environment */
2156         si.newmode = 0;
2157         if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2158                 die_startup();
2159
2160         /* determine size of argv and environ conversion buffer */
2161         maxlen = wcslen(_wpgmptr);
2162         for (i = 1; i < argc; i++)
2163                 maxlen = max(maxlen, wcslen(wargv[i]));
2164         for (i = 0; wenv[i]; i++)
2165                 maxlen = max(maxlen, wcslen(wenv[i]));
2166
2167         /*
2168          * nedmalloc can't free CRT memory, allocate resizable environment
2169          * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2170          * use it while initializing the environment itself.
2171          */
2172         environ_size = i + 1;
2173         environ_alloc = alloc_nr(environ_size * sizeof(char*));
2174         environ = malloc_startup(environ_alloc);
2175
2176         /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2177         maxlen = 3 * maxlen + 1;
2178         buffer = malloc_startup(maxlen);
2179
2180         /* convert command line arguments and environment to UTF-8 */
2181         __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2182         for (i = 1; i < argc; i++)
2183                 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2184         for (i = 0; wenv[i]; i++)
2185                 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2186         environ[i] = NULL;
2187         free(buffer);
2188
2189         /* sort environment for O(log n) getenv / putenv */
2190         qsort(environ, i, sizeof(char*), compareenv);
2191
2192         /* fix Windows specific environment settings */
2193
2194         /* on Windows it is TMP and TEMP */
2195         if (!getenv("TMPDIR")) {
2196                 const char *tmp = getenv("TMP");
2197                 if (!tmp)
2198                         tmp = getenv("TEMP");
2199                 if (tmp)
2200                         setenv("TMPDIR", tmp, 1);
2201         }
2202
2203         /* simulate TERM to enable auto-color (see color.c) */
2204         if (!getenv("TERM"))
2205                 setenv("TERM", "winansi", 1);
2206
2207         /* initialize critical section for waitpid pinfo_t list */
2208         InitializeCriticalSection(&pinfo_cs);
2209
2210         /* set up default file mode and file modes for stdin/out/err */
2211         _fmode = _O_BINARY;
2212         _setmode(_fileno(stdin), _O_BINARY);
2213         _setmode(_fileno(stdout), _O_BINARY);
2214         _setmode(_fileno(stderr), _O_BINARY);
2215
2216         /* initialize Unicode console */
2217         winansi_init();
2218 }