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         wpath[wcslen(wpath)-4] = '\0';
1043         if ((!exe_only || isexe) && _waccess(wpath, F_OK) == 0) {
1044                 if (!(GetFileAttributesW(wpath) & FILE_ATTRIBUTE_DIRECTORY)) {
1045                         path[strlen(path)-4] = '\0';
1046                         return xstrdup(path);
1047                 }
1048         }
1049         return NULL;
1050 }
1051
1052 /*
1053  * Determines the absolute path of cmd using the split path in path.
1054  * If cmd contains a slash or backslash, no lookup is performed.
1055  */
1056 static char *path_lookup(const char *cmd, char **path, int exe_only)
1057 {
1058         char *prog = NULL;
1059         int len = strlen(cmd);
1060         int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
1061
1062         if (strchr(cmd, '/') || strchr(cmd, '\\'))
1063                 prog = xstrdup(cmd);
1064
1065         while (!prog && *path)
1066                 prog = lookup_prog(*path++, cmd, isexe, exe_only);
1067
1068         return prog;
1069 }
1070
1071 /*
1072  * Create environment block suitable for CreateProcess. Merges current
1073  * process environment and the supplied environment changes.
1074  */
1075 static wchar_t *make_environment_block(char **deltaenv)
1076 {
1077         wchar_t *wenvblk = NULL;
1078         char **tmpenv;
1079         int i = 0, size = environ_size, wenvsz = 0, wenvpos = 0;
1080
1081         while (deltaenv && deltaenv[i])
1082                 i++;
1083
1084         /* copy the environment, leaving space for changes */
1085         tmpenv = xmalloc((size + i) * sizeof(char*));
1086         memcpy(tmpenv, environ, size * sizeof(char*));
1087
1088         /* merge supplied environment changes into the temporary environment */
1089         for (i = 0; deltaenv && deltaenv[i]; i++)
1090                 size = do_putenv(tmpenv, deltaenv[i], size, 0);
1091
1092         /* create environment block from temporary environment */
1093         for (i = 0; tmpenv[i]; i++) {
1094                 size = 2 * strlen(tmpenv[i]) + 2; /* +2 for final \0 */
1095                 ALLOC_GROW(wenvblk, (wenvpos + size) * sizeof(wchar_t), wenvsz);
1096                 wenvpos += xutftowcs(&wenvblk[wenvpos], tmpenv[i], size) + 1;
1097         }
1098         /* add final \0 terminator */
1099         wenvblk[wenvpos] = 0;
1100         free(tmpenv);
1101         return wenvblk;
1102 }
1103
1104 struct pinfo_t {
1105         struct pinfo_t *next;
1106         pid_t pid;
1107         HANDLE proc;
1108 } pinfo_t;
1109 struct pinfo_t *pinfo = NULL;
1110 CRITICAL_SECTION pinfo_cs;
1111
1112 static pid_t mingw_spawnve_fd(const char *cmd, const char **argv, char **deltaenv,
1113                               const char *dir,
1114                               int prepend_cmd, int fhin, int fhout, int fherr)
1115 {
1116         STARTUPINFOW si;
1117         PROCESS_INFORMATION pi;
1118         struct strbuf args;
1119         wchar_t wcmd[MAX_PATH], wdir[MAX_PATH], *wargs, *wenvblk = NULL;
1120         unsigned flags = CREATE_UNICODE_ENVIRONMENT;
1121         BOOL ret;
1122
1123         /* Determine whether or not we are associated to a console */
1124         HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
1125                         FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
1126                         FILE_ATTRIBUTE_NORMAL, NULL);
1127         if (cons == INVALID_HANDLE_VALUE) {
1128                 /* There is no console associated with this process.
1129                  * Since the child is a console process, Windows
1130                  * would normally create a console window. But
1131                  * since we'll be redirecting std streams, we do
1132                  * not need the console.
1133                  * It is necessary to use DETACHED_PROCESS
1134                  * instead of CREATE_NO_WINDOW to make ssh
1135                  * recognize that it has no console.
1136                  */
1137                 flags |= DETACHED_PROCESS;
1138         } else {
1139                 /* There is already a console. If we specified
1140                  * DETACHED_PROCESS here, too, Windows would
1141                  * disassociate the child from the console.
1142                  * The same is true for CREATE_NO_WINDOW.
1143                  * Go figure!
1144                  */
1145                 CloseHandle(cons);
1146         }
1147         memset(&si, 0, sizeof(si));
1148         si.cb = sizeof(si);
1149         si.dwFlags = STARTF_USESTDHANDLES;
1150         si.hStdInput = winansi_get_osfhandle(fhin);
1151         si.hStdOutput = winansi_get_osfhandle(fhout);
1152         si.hStdError = winansi_get_osfhandle(fherr);
1153
1154         if (xutftowcs_path(wcmd, cmd) < 0)
1155                 return -1;
1156         if (dir && xutftowcs_path(wdir, dir) < 0)
1157                 return -1;
1158
1159         /* concatenate argv, quoting args as we go */
1160         strbuf_init(&args, 0);
1161         if (prepend_cmd) {
1162                 char *quoted = (char *)quote_arg(cmd);
1163                 strbuf_addstr(&args, quoted);
1164                 if (quoted != cmd)
1165                         free(quoted);
1166         }
1167         for (; *argv; argv++) {
1168                 char *quoted = (char *)quote_arg(*argv);
1169                 if (*args.buf)
1170                         strbuf_addch(&args, ' ');
1171                 strbuf_addstr(&args, quoted);
1172                 if (quoted != *argv)
1173                         free(quoted);
1174         }
1175
1176         wargs = xmalloc((2 * args.len + 1) * sizeof(wchar_t));
1177         xutftowcs(wargs, args.buf, 2 * args.len + 1);
1178         strbuf_release(&args);
1179
1180         wenvblk = make_environment_block(deltaenv);
1181
1182         memset(&pi, 0, sizeof(pi));
1183         ret = CreateProcessW(wcmd, wargs, NULL, NULL, TRUE, flags,
1184                 wenvblk, dir ? wdir : NULL, &si, &pi);
1185
1186         free(wenvblk);
1187         free(wargs);
1188
1189         if (!ret) {
1190                 errno = ENOENT;
1191                 return -1;
1192         }
1193         CloseHandle(pi.hThread);
1194
1195         /*
1196          * The process ID is the human-readable identifier of the process
1197          * that we want to present in log and error messages. The handle
1198          * is not useful for this purpose. But we cannot close it, either,
1199          * because it is not possible to turn a process ID into a process
1200          * handle after the process terminated.
1201          * Keep the handle in a list for waitpid.
1202          */
1203         EnterCriticalSection(&pinfo_cs);
1204         {
1205                 struct pinfo_t *info = xmalloc(sizeof(struct pinfo_t));
1206                 info->pid = pi.dwProcessId;
1207                 info->proc = pi.hProcess;
1208                 info->next = pinfo;
1209                 pinfo = info;
1210         }
1211         LeaveCriticalSection(&pinfo_cs);
1212
1213         return (pid_t)pi.dwProcessId;
1214 }
1215
1216 static pid_t mingw_spawnv(const char *cmd, const char **argv, int prepend_cmd)
1217 {
1218         return mingw_spawnve_fd(cmd, argv, NULL, NULL, prepend_cmd, 0, 1, 2);
1219 }
1220
1221 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **deltaenv,
1222                      const char *dir,
1223                      int fhin, int fhout, int fherr)
1224 {
1225         pid_t pid;
1226         char **path = get_path_split();
1227         char *prog = path_lookup(cmd, path, 0);
1228
1229         if (!prog) {
1230                 errno = ENOENT;
1231                 pid = -1;
1232         }
1233         else {
1234                 const char *interpr = parse_interpreter(prog);
1235
1236                 if (interpr) {
1237                         const char *argv0 = argv[0];
1238                         char *iprog = path_lookup(interpr, path, 1);
1239                         argv[0] = prog;
1240                         if (!iprog) {
1241                                 errno = ENOENT;
1242                                 pid = -1;
1243                         }
1244                         else {
1245                                 pid = mingw_spawnve_fd(iprog, argv, deltaenv, dir, 1,
1246                                                        fhin, fhout, fherr);
1247                                 free(iprog);
1248                         }
1249                         argv[0] = argv0;
1250                 }
1251                 else
1252                         pid = mingw_spawnve_fd(prog, argv, deltaenv, dir, 0,
1253                                                fhin, fhout, fherr);
1254                 free(prog);
1255         }
1256         free_path_split(path);
1257         return pid;
1258 }
1259
1260 static int try_shell_exec(const char *cmd, char *const *argv)
1261 {
1262         const char *interpr = parse_interpreter(cmd);
1263         char **path;
1264         char *prog;
1265         int pid = 0;
1266
1267         if (!interpr)
1268                 return 0;
1269         path = get_path_split();
1270         prog = path_lookup(interpr, path, 1);
1271         if (prog) {
1272                 int argc = 0;
1273                 const char **argv2;
1274                 while (argv[argc]) argc++;
1275                 argv2 = xmalloc(sizeof(*argv) * (argc+1));
1276                 argv2[0] = (char *)cmd; /* full path to the script file */
1277                 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
1278                 pid = mingw_spawnv(prog, argv2, 1);
1279                 if (pid >= 0) {
1280                         int status;
1281                         if (waitpid(pid, &status, 0) < 0)
1282                                 status = 255;
1283                         exit(status);
1284                 }
1285                 pid = 1;        /* indicate that we tried but failed */
1286                 free(prog);
1287                 free(argv2);
1288         }
1289         free_path_split(path);
1290         return pid;
1291 }
1292
1293 int mingw_execv(const char *cmd, char *const *argv)
1294 {
1295         /* check if git_command is a shell script */
1296         if (!try_shell_exec(cmd, argv)) {
1297                 int pid, status;
1298
1299                 pid = mingw_spawnv(cmd, (const char **)argv, 0);
1300                 if (pid < 0)
1301                         return -1;
1302                 if (waitpid(pid, &status, 0) < 0)
1303                         status = 255;
1304                 exit(status);
1305         }
1306         return -1;
1307 }
1308
1309 int mingw_execvp(const char *cmd, char *const *argv)
1310 {
1311         char **path = get_path_split();
1312         char *prog = path_lookup(cmd, path, 0);
1313
1314         if (prog) {
1315                 mingw_execv(prog, argv);
1316                 free(prog);
1317         } else
1318                 errno = ENOENT;
1319
1320         free_path_split(path);
1321         return -1;
1322 }
1323
1324 int mingw_kill(pid_t pid, int sig)
1325 {
1326         if (pid > 0 && sig == SIGTERM) {
1327                 HANDLE h = OpenProcess(PROCESS_TERMINATE, FALSE, pid);
1328
1329                 if (TerminateProcess(h, -1)) {
1330                         CloseHandle(h);
1331                         return 0;
1332                 }
1333
1334                 errno = err_win_to_posix(GetLastError());
1335                 CloseHandle(h);
1336                 return -1;
1337         }
1338
1339         errno = EINVAL;
1340         return -1;
1341 }
1342
1343 /*
1344  * Note, this isn't a complete replacement for getaddrinfo. It assumes
1345  * that service contains a numerical port, or that it is null. It
1346  * does a simple search using gethostbyname, and returns one IPv4 host
1347  * if one was found.
1348  */
1349 static int WSAAPI getaddrinfo_stub(const char *node, const char *service,
1350                                    const struct addrinfo *hints,
1351                                    struct addrinfo **res)
1352 {
1353         struct hostent *h = NULL;
1354         struct addrinfo *ai;
1355         struct sockaddr_in *sin;
1356
1357         if (node) {
1358                 h = gethostbyname(node);
1359                 if (!h)
1360                         return WSAGetLastError();
1361         }
1362
1363         ai = xmalloc(sizeof(struct addrinfo));
1364         *res = ai;
1365         ai->ai_flags = 0;
1366         ai->ai_family = AF_INET;
1367         ai->ai_socktype = hints ? hints->ai_socktype : 0;
1368         switch (ai->ai_socktype) {
1369         case SOCK_STREAM:
1370                 ai->ai_protocol = IPPROTO_TCP;
1371                 break;
1372         case SOCK_DGRAM:
1373                 ai->ai_protocol = IPPROTO_UDP;
1374                 break;
1375         default:
1376                 ai->ai_protocol = 0;
1377                 break;
1378         }
1379         ai->ai_addrlen = sizeof(struct sockaddr_in);
1380         if (hints && (hints->ai_flags & AI_CANONNAME))
1381                 ai->ai_canonname = h ? xstrdup(h->h_name) : NULL;
1382         else
1383                 ai->ai_canonname = NULL;
1384
1385         sin = xmalloc(ai->ai_addrlen);
1386         memset(sin, 0, ai->ai_addrlen);
1387         sin->sin_family = AF_INET;
1388         /* Note: getaddrinfo is supposed to allow service to be a string,
1389          * which should be looked up using getservbyname. This is
1390          * currently not implemented */
1391         if (service)
1392                 sin->sin_port = htons(atoi(service));
1393         if (h)
1394                 sin->sin_addr = *(struct in_addr *)h->h_addr;
1395         else if (hints && (hints->ai_flags & AI_PASSIVE))
1396                 sin->sin_addr.s_addr = INADDR_ANY;
1397         else
1398                 sin->sin_addr.s_addr = INADDR_LOOPBACK;
1399         ai->ai_addr = (struct sockaddr *)sin;
1400         ai->ai_next = 0;
1401         return 0;
1402 }
1403
1404 static void WSAAPI freeaddrinfo_stub(struct addrinfo *res)
1405 {
1406         free(res->ai_canonname);
1407         free(res->ai_addr);
1408         free(res);
1409 }
1410
1411 static int WSAAPI getnameinfo_stub(const struct sockaddr *sa, socklen_t salen,
1412                                    char *host, DWORD hostlen,
1413                                    char *serv, DWORD servlen, int flags)
1414 {
1415         const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
1416         if (sa->sa_family != AF_INET)
1417                 return EAI_FAMILY;
1418         if (!host && !serv)
1419                 return EAI_NONAME;
1420
1421         if (host && hostlen > 0) {
1422                 struct hostent *ent = NULL;
1423                 if (!(flags & NI_NUMERICHOST))
1424                         ent = gethostbyaddr((const char *)&sin->sin_addr,
1425                                             sizeof(sin->sin_addr), AF_INET);
1426
1427                 if (ent)
1428                         snprintf(host, hostlen, "%s", ent->h_name);
1429                 else if (flags & NI_NAMEREQD)
1430                         return EAI_NONAME;
1431                 else
1432                         snprintf(host, hostlen, "%s", inet_ntoa(sin->sin_addr));
1433         }
1434
1435         if (serv && servlen > 0) {
1436                 struct servent *ent = NULL;
1437                 if (!(flags & NI_NUMERICSERV))
1438                         ent = getservbyport(sin->sin_port,
1439                                             flags & NI_DGRAM ? "udp" : "tcp");
1440
1441                 if (ent)
1442                         snprintf(serv, servlen, "%s", ent->s_name);
1443                 else
1444                         snprintf(serv, servlen, "%d", ntohs(sin->sin_port));
1445         }
1446
1447         return 0;
1448 }
1449
1450 static HMODULE ipv6_dll = NULL;
1451 static void (WSAAPI *ipv6_freeaddrinfo)(struct addrinfo *res);
1452 static int (WSAAPI *ipv6_getaddrinfo)(const char *node, const char *service,
1453                                       const struct addrinfo *hints,
1454                                       struct addrinfo **res);
1455 static int (WSAAPI *ipv6_getnameinfo)(const struct sockaddr *sa, socklen_t salen,
1456                                       char *host, DWORD hostlen,
1457                                       char *serv, DWORD servlen, int flags);
1458 /*
1459  * gai_strerror is an inline function in the ws2tcpip.h header, so we
1460  * don't need to try to load that one dynamically.
1461  */
1462
1463 static void socket_cleanup(void)
1464 {
1465         WSACleanup();
1466         if (ipv6_dll)
1467                 FreeLibrary(ipv6_dll);
1468         ipv6_dll = NULL;
1469         ipv6_freeaddrinfo = freeaddrinfo_stub;
1470         ipv6_getaddrinfo = getaddrinfo_stub;
1471         ipv6_getnameinfo = getnameinfo_stub;
1472 }
1473
1474 static void ensure_socket_initialization(void)
1475 {
1476         WSADATA wsa;
1477         static int initialized = 0;
1478         const char *libraries[] = { "ws2_32.dll", "wship6.dll", NULL };
1479         const char **name;
1480
1481         if (initialized)
1482                 return;
1483
1484         if (WSAStartup(MAKEWORD(2,2), &wsa))
1485                 die("unable to initialize winsock subsystem, error %d",
1486                         WSAGetLastError());
1487
1488         for (name = libraries; *name; name++) {
1489                 ipv6_dll = LoadLibrary(*name);
1490                 if (!ipv6_dll)
1491                         continue;
1492
1493                 ipv6_freeaddrinfo = (void (WSAAPI *)(struct addrinfo *))
1494                         GetProcAddress(ipv6_dll, "freeaddrinfo");
1495                 ipv6_getaddrinfo = (int (WSAAPI *)(const char *, const char *,
1496                                                    const struct addrinfo *,
1497                                                    struct addrinfo **))
1498                         GetProcAddress(ipv6_dll, "getaddrinfo");
1499                 ipv6_getnameinfo = (int (WSAAPI *)(const struct sockaddr *,
1500                                                    socklen_t, char *, DWORD,
1501                                                    char *, DWORD, int))
1502                         GetProcAddress(ipv6_dll, "getnameinfo");
1503                 if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1504                         FreeLibrary(ipv6_dll);
1505                         ipv6_dll = NULL;
1506                 } else
1507                         break;
1508         }
1509         if (!ipv6_freeaddrinfo || !ipv6_getaddrinfo || !ipv6_getnameinfo) {
1510                 ipv6_freeaddrinfo = freeaddrinfo_stub;
1511                 ipv6_getaddrinfo = getaddrinfo_stub;
1512                 ipv6_getnameinfo = getnameinfo_stub;
1513         }
1514
1515         atexit(socket_cleanup);
1516         initialized = 1;
1517 }
1518
1519 #undef gethostname
1520 int mingw_gethostname(char *name, int namelen)
1521 {
1522     ensure_socket_initialization();
1523     return gethostname(name, namelen);
1524 }
1525
1526 #undef gethostbyname
1527 struct hostent *mingw_gethostbyname(const char *host)
1528 {
1529         ensure_socket_initialization();
1530         return gethostbyname(host);
1531 }
1532
1533 void mingw_freeaddrinfo(struct addrinfo *res)
1534 {
1535         ipv6_freeaddrinfo(res);
1536 }
1537
1538 int mingw_getaddrinfo(const char *node, const char *service,
1539                       const struct addrinfo *hints, struct addrinfo **res)
1540 {
1541         ensure_socket_initialization();
1542         return ipv6_getaddrinfo(node, service, hints, res);
1543 }
1544
1545 int mingw_getnameinfo(const struct sockaddr *sa, socklen_t salen,
1546                       char *host, DWORD hostlen, char *serv, DWORD servlen,
1547                       int flags)
1548 {
1549         ensure_socket_initialization();
1550         return ipv6_getnameinfo(sa, salen, host, hostlen, serv, servlen, flags);
1551 }
1552
1553 int mingw_socket(int domain, int type, int protocol)
1554 {
1555         int sockfd;
1556         SOCKET s;
1557
1558         ensure_socket_initialization();
1559         s = WSASocket(domain, type, protocol, NULL, 0, 0);
1560         if (s == INVALID_SOCKET) {
1561                 /*
1562                  * WSAGetLastError() values are regular BSD error codes
1563                  * biased by WSABASEERR.
1564                  * However, strerror() does not know about networking
1565                  * specific errors, which are values beginning at 38 or so.
1566                  * Therefore, we choose to leave the biased error code
1567                  * in errno so that _if_ someone looks up the code somewhere,
1568                  * then it is at least the number that are usually listed.
1569                  */
1570                 errno = WSAGetLastError();
1571                 return -1;
1572         }
1573         /* convert into a file descriptor */
1574         if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1575                 closesocket(s);
1576                 return error("unable to make a socket file descriptor: %s",
1577                         strerror(errno));
1578         }
1579         return sockfd;
1580 }
1581
1582 #undef connect
1583 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1584 {
1585         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1586         return connect(s, sa, sz);
1587 }
1588
1589 #undef bind
1590 int mingw_bind(int sockfd, struct sockaddr *sa, size_t sz)
1591 {
1592         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1593         return bind(s, sa, sz);
1594 }
1595
1596 #undef setsockopt
1597 int mingw_setsockopt(int sockfd, int lvl, int optname, void *optval, int optlen)
1598 {
1599         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1600         return setsockopt(s, lvl, optname, (const char*)optval, optlen);
1601 }
1602
1603 #undef shutdown
1604 int mingw_shutdown(int sockfd, int how)
1605 {
1606         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1607         return shutdown(s, how);
1608 }
1609
1610 #undef listen
1611 int mingw_listen(int sockfd, int backlog)
1612 {
1613         SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1614         return listen(s, backlog);
1615 }
1616
1617 #undef accept
1618 int mingw_accept(int sockfd1, struct sockaddr *sa, socklen_t *sz)
1619 {
1620         int sockfd2;
1621
1622         SOCKET s1 = (SOCKET)_get_osfhandle(sockfd1);
1623         SOCKET s2 = accept(s1, sa, sz);
1624
1625         /* convert into a file descriptor */
1626         if ((sockfd2 = _open_osfhandle(s2, O_RDWR|O_BINARY)) < 0) {
1627                 int err = errno;
1628                 closesocket(s2);
1629                 return error("unable to make a socket file descriptor: %s",
1630                         strerror(err));
1631         }
1632         return sockfd2;
1633 }
1634
1635 #undef rename
1636 int mingw_rename(const char *pold, const char *pnew)
1637 {
1638         DWORD attrs, gle;
1639         int tries = 0;
1640         wchar_t wpold[MAX_PATH], wpnew[MAX_PATH];
1641         if (xutftowcs_path(wpold, pold) < 0 || xutftowcs_path(wpnew, pnew) < 0)
1642                 return -1;
1643
1644         /*
1645          * Try native rename() first to get errno right.
1646          * It is based on MoveFile(), which cannot overwrite existing files.
1647          */
1648         if (!_wrename(wpold, wpnew))
1649                 return 0;
1650         if (errno != EEXIST)
1651                 return -1;
1652 repeat:
1653         if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1654                 return 0;
1655         /* TODO: translate more errors */
1656         gle = GetLastError();
1657         if (gle == ERROR_ACCESS_DENIED &&
1658             (attrs = GetFileAttributesW(wpnew)) != INVALID_FILE_ATTRIBUTES) {
1659                 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1660                         errno = EISDIR;
1661                         return -1;
1662                 }
1663                 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1664                     SetFileAttributesW(wpnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1665                         if (MoveFileExW(wpold, wpnew, MOVEFILE_REPLACE_EXISTING))
1666                                 return 0;
1667                         gle = GetLastError();
1668                         /* revert file attributes on failure */
1669                         SetFileAttributesW(wpnew, attrs);
1670                 }
1671         }
1672         if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1673                 /*
1674                  * We assume that some other process had the source or
1675                  * destination file open at the wrong moment and retry.
1676                  * In order to give the other process a higher chance to
1677                  * complete its operation, we give up our time slice now.
1678                  * If we have to retry again, we do sleep a bit.
1679                  */
1680                 Sleep(delay[tries]);
1681                 tries++;
1682                 goto repeat;
1683         }
1684         if (gle == ERROR_ACCESS_DENIED &&
1685                ask_yes_no_if_possible("Rename from '%s' to '%s' failed. "
1686                        "Should I try again?", pold, pnew))
1687                 goto repeat;
1688
1689         errno = EACCES;
1690         return -1;
1691 }
1692
1693 /*
1694  * Note that this doesn't return the actual pagesize, but
1695  * the allocation granularity. If future Windows specific git code
1696  * needs the real getpagesize function, we need to find another solution.
1697  */
1698 int mingw_getpagesize(void)
1699 {
1700         SYSTEM_INFO si;
1701         GetSystemInfo(&si);
1702         return si.dwAllocationGranularity;
1703 }
1704
1705 struct passwd *getpwuid(int uid)
1706 {
1707         static char user_name[100];
1708         static struct passwd p;
1709
1710         DWORD len = sizeof(user_name);
1711         if (!GetUserName(user_name, &len))
1712                 return NULL;
1713         p.pw_name = user_name;
1714         p.pw_gecos = "unknown";
1715         p.pw_dir = NULL;
1716         return &p;
1717 }
1718
1719 static HANDLE timer_event;
1720 static HANDLE timer_thread;
1721 static int timer_interval;
1722 static int one_shot;
1723 static sig_handler_t timer_fn = SIG_DFL, sigint_fn = SIG_DFL;
1724
1725 /* The timer works like this:
1726  * The thread, ticktack(), is a trivial routine that most of the time
1727  * only waits to receive the signal to terminate. The main thread tells
1728  * the thread to terminate by setting the timer_event to the signalled
1729  * state.
1730  * But ticktack() interrupts the wait state after the timer's interval
1731  * length to call the signal handler.
1732  */
1733
1734 static unsigned __stdcall ticktack(void *dummy)
1735 {
1736         while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1737                 mingw_raise(SIGALRM);
1738                 if (one_shot)
1739                         break;
1740         }
1741         return 0;
1742 }
1743
1744 static int start_timer_thread(void)
1745 {
1746         timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1747         if (timer_event) {
1748                 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1749                 if (!timer_thread )
1750                         return errno = ENOMEM,
1751                                 error("cannot start timer thread");
1752         } else
1753                 return errno = ENOMEM,
1754                         error("cannot allocate resources for timer");
1755         return 0;
1756 }
1757
1758 static void stop_timer_thread(void)
1759 {
1760         if (timer_event)
1761                 SetEvent(timer_event);  /* tell thread to terminate */
1762         if (timer_thread) {
1763                 int rc = WaitForSingleObject(timer_thread, 1000);
1764                 if (rc == WAIT_TIMEOUT)
1765                         error("timer thread did not terminate timely");
1766                 else if (rc != WAIT_OBJECT_0)
1767                         error("waiting for timer thread failed: %lu",
1768                               GetLastError());
1769                 CloseHandle(timer_thread);
1770         }
1771         if (timer_event)
1772                 CloseHandle(timer_event);
1773         timer_event = NULL;
1774         timer_thread = NULL;
1775 }
1776
1777 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1778 {
1779         return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1780 }
1781
1782 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1783 {
1784         static const struct timeval zero;
1785         static int atexit_done;
1786
1787         if (out != NULL)
1788                 return errno = EINVAL,
1789                         error("setitimer param 3 != NULL not implemented");
1790         if (!is_timeval_eq(&in->it_interval, &zero) &&
1791             !is_timeval_eq(&in->it_interval, &in->it_value))
1792                 return errno = EINVAL,
1793                         error("setitimer: it_interval must be zero or eq it_value");
1794
1795         if (timer_thread)
1796                 stop_timer_thread();
1797
1798         if (is_timeval_eq(&in->it_value, &zero) &&
1799             is_timeval_eq(&in->it_interval, &zero))
1800                 return 0;
1801
1802         timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1803         one_shot = is_timeval_eq(&in->it_interval, &zero);
1804         if (!atexit_done) {
1805                 atexit(stop_timer_thread);
1806                 atexit_done = 1;
1807         }
1808         return start_timer_thread();
1809 }
1810
1811 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1812 {
1813         if (sig != SIGALRM)
1814                 return errno = EINVAL,
1815                         error("sigaction only implemented for SIGALRM");
1816         if (out != NULL)
1817                 return errno = EINVAL,
1818                         error("sigaction: param 3 != NULL not implemented");
1819
1820         timer_fn = in->sa_handler;
1821         return 0;
1822 }
1823
1824 #undef signal
1825 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1826 {
1827         sig_handler_t old = timer_fn;
1828
1829         switch (sig) {
1830         case SIGALRM:
1831                 timer_fn = handler;
1832                 break;
1833
1834         case SIGINT:
1835                 sigint_fn = handler;
1836                 break;
1837
1838         default:
1839                 return signal(sig, handler);
1840         }
1841
1842         return old;
1843 }
1844
1845 #undef raise
1846 int mingw_raise(int sig)
1847 {
1848         switch (sig) {
1849         case SIGALRM:
1850                 if (timer_fn == SIG_DFL) {
1851                         if (isatty(STDERR_FILENO))
1852                                 fputs("Alarm clock\n", stderr);
1853                         exit(128 + SIGALRM);
1854                 } else if (timer_fn != SIG_IGN)
1855                         timer_fn(SIGALRM);
1856                 return 0;
1857
1858         case SIGINT:
1859                 if (sigint_fn == SIG_DFL)
1860                         exit(128 + SIGINT);
1861                 else if (sigint_fn != SIG_IGN)
1862                         sigint_fn(SIGINT);
1863                 return 0;
1864
1865         default:
1866                 return raise(sig);
1867         }
1868 }
1869
1870
1871 static const char *make_backslash_path(const char *path)
1872 {
1873         static char buf[PATH_MAX + 1];
1874         char *c;
1875
1876         if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1877                 die("Too long path: %.*s", 60, path);
1878
1879         for (c = buf; *c; c++) {
1880                 if (*c == '/')
1881                         *c = '\\';
1882         }
1883         return buf;
1884 }
1885
1886 void mingw_open_html(const char *unixpath)
1887 {
1888         const char *htmlpath = make_backslash_path(unixpath);
1889         typedef HINSTANCE (WINAPI *T)(HWND, const char *,
1890                         const char *, const char *, const char *, INT);
1891         T ShellExecute;
1892         HMODULE shell32;
1893         int r;
1894
1895         shell32 = LoadLibrary("shell32.dll");
1896         if (!shell32)
1897                 die("cannot load shell32.dll");
1898         ShellExecute = (T)GetProcAddress(shell32, "ShellExecuteA");
1899         if (!ShellExecute)
1900                 die("cannot run browser");
1901
1902         printf("Launching default browser to display HTML ...\n");
1903         r = (int)ShellExecute(NULL, "open", htmlpath, NULL, "\\", SW_SHOWNORMAL);
1904         FreeLibrary(shell32);
1905         /* see the MSDN documentation referring to the result codes here */
1906         if (r <= 32) {
1907                 die("failed to launch browser for %.*s", MAX_PATH, unixpath);
1908         }
1909 }
1910
1911 int link(const char *oldpath, const char *newpath)
1912 {
1913         typedef BOOL (WINAPI *T)(LPCWSTR, LPCWSTR, LPSECURITY_ATTRIBUTES);
1914         static T create_hard_link = NULL;
1915         wchar_t woldpath[MAX_PATH], wnewpath[MAX_PATH];
1916         if (xutftowcs_path(woldpath, oldpath) < 0 ||
1917                 xutftowcs_path(wnewpath, newpath) < 0)
1918                 return -1;
1919
1920         if (!create_hard_link) {
1921                 create_hard_link = (T) GetProcAddress(
1922                         GetModuleHandle("kernel32.dll"), "CreateHardLinkW");
1923                 if (!create_hard_link)
1924                         create_hard_link = (T)-1;
1925         }
1926         if (create_hard_link == (T)-1) {
1927                 errno = ENOSYS;
1928                 return -1;
1929         }
1930         if (!create_hard_link(wnewpath, woldpath, NULL)) {
1931                 errno = err_win_to_posix(GetLastError());
1932                 return -1;
1933         }
1934         return 0;
1935 }
1936
1937 pid_t waitpid(pid_t pid, int *status, int options)
1938 {
1939         HANDLE h = OpenProcess(SYNCHRONIZE | PROCESS_QUERY_INFORMATION,
1940             FALSE, pid);
1941         if (!h) {
1942                 errno = ECHILD;
1943                 return -1;
1944         }
1945
1946         if (pid > 0 && options & WNOHANG) {
1947                 if (WAIT_OBJECT_0 != WaitForSingleObject(h, 0)) {
1948                         CloseHandle(h);
1949                         return 0;
1950                 }
1951                 options &= ~WNOHANG;
1952         }
1953
1954         if (options == 0) {
1955                 struct pinfo_t **ppinfo;
1956                 if (WaitForSingleObject(h, INFINITE) != WAIT_OBJECT_0) {
1957                         CloseHandle(h);
1958                         return 0;
1959                 }
1960
1961                 if (status)
1962                         GetExitCodeProcess(h, (LPDWORD)status);
1963
1964                 EnterCriticalSection(&pinfo_cs);
1965
1966                 ppinfo = &pinfo;
1967                 while (*ppinfo) {
1968                         struct pinfo_t *info = *ppinfo;
1969                         if (info->pid == pid) {
1970                                 CloseHandle(info->proc);
1971                                 *ppinfo = info->next;
1972                                 free(info);
1973                                 break;
1974                         }
1975                         ppinfo = &info->next;
1976                 }
1977
1978                 LeaveCriticalSection(&pinfo_cs);
1979
1980                 CloseHandle(h);
1981                 return pid;
1982         }
1983         CloseHandle(h);
1984
1985         errno = EINVAL;
1986         return -1;
1987 }
1988
1989 const char *get_windows_home_directory(void)
1990 {
1991         static const char *home_directory = NULL;
1992         struct strbuf buf = STRBUF_INIT;
1993
1994         if (home_directory)
1995                 return home_directory;
1996
1997         home_directory = getenv("HOME");
1998         if (home_directory && *home_directory)
1999                 return home_directory;
2000
2001         strbuf_addf(&buf, "%s/%s", getenv("HOMEDRIVE"), getenv("HOMEPATH"));
2002         home_directory = strbuf_detach(&buf, NULL);
2003
2004         return home_directory;
2005 }
2006
2007 int mingw_offset_1st_component(const char *path)
2008 {
2009         int offset = 0;
2010         if (has_dos_drive_prefix(path))
2011                 offset = 2;
2012
2013         /* unc paths */
2014         else if (is_dir_sep(path[0]) && is_dir_sep(path[1])) {
2015
2016                 /* skip server name */
2017                 char *pos = strpbrk(path + 2, "\\/");
2018                 if (!pos)
2019                         return 0; /* Error: malformed unc path */
2020
2021                 do {
2022                         pos++;
2023                 } while (*pos && !is_dir_sep(*pos));
2024
2025                 offset = pos - path;
2026         }
2027
2028         return offset + is_dir_sep(path[offset]);
2029 }
2030
2031 int xutftowcsn(wchar_t *wcs, const char *utfs, size_t wcslen, int utflen)
2032 {
2033         int upos = 0, wpos = 0;
2034         const unsigned char *utf = (const unsigned char*) utfs;
2035         if (!utf || !wcs || wcslen < 1) {
2036                 errno = EINVAL;
2037                 return -1;
2038         }
2039         /* reserve space for \0 */
2040         wcslen--;
2041         if (utflen < 0)
2042                 utflen = INT_MAX;
2043
2044         while (upos < utflen) {
2045                 int c = utf[upos++] & 0xff;
2046                 if (utflen == INT_MAX && c == 0)
2047                         break;
2048
2049                 if (wpos >= wcslen) {
2050                         wcs[wpos] = 0;
2051                         errno = ERANGE;
2052                         return -1;
2053                 }
2054
2055                 if (c < 0x80) {
2056                         /* ASCII */
2057                         wcs[wpos++] = c;
2058                 } else if (c >= 0xc2 && c < 0xe0 && upos < utflen &&
2059                                 (utf[upos] & 0xc0) == 0x80) {
2060                         /* 2-byte utf-8 */
2061                         c = ((c & 0x1f) << 6);
2062                         c |= (utf[upos++] & 0x3f);
2063                         wcs[wpos++] = c;
2064                 } else if (c >= 0xe0 && c < 0xf0 && upos + 1 < utflen &&
2065                                 !(c == 0xe0 && utf[upos] < 0xa0) && /* over-long encoding */
2066                                 (utf[upos] & 0xc0) == 0x80 &&
2067                                 (utf[upos + 1] & 0xc0) == 0x80) {
2068                         /* 3-byte utf-8 */
2069                         c = ((c & 0x0f) << 12);
2070                         c |= ((utf[upos++] & 0x3f) << 6);
2071                         c |= (utf[upos++] & 0x3f);
2072                         wcs[wpos++] = c;
2073                 } else if (c >= 0xf0 && c < 0xf5 && upos + 2 < utflen &&
2074                                 wpos + 1 < wcslen &&
2075                                 !(c == 0xf0 && utf[upos] < 0x90) && /* over-long encoding */
2076                                 !(c == 0xf4 && utf[upos] >= 0x90) && /* > \u10ffff */
2077                                 (utf[upos] & 0xc0) == 0x80 &&
2078                                 (utf[upos + 1] & 0xc0) == 0x80 &&
2079                                 (utf[upos + 2] & 0xc0) == 0x80) {
2080                         /* 4-byte utf-8: convert to \ud8xx \udcxx surrogate pair */
2081                         c = ((c & 0x07) << 18);
2082                         c |= ((utf[upos++] & 0x3f) << 12);
2083                         c |= ((utf[upos++] & 0x3f) << 6);
2084                         c |= (utf[upos++] & 0x3f);
2085                         c -= 0x10000;
2086                         wcs[wpos++] = 0xd800 | (c >> 10);
2087                         wcs[wpos++] = 0xdc00 | (c & 0x3ff);
2088                 } else if (c >= 0xa0) {
2089                         /* invalid utf-8 byte, printable unicode char: convert 1:1 */
2090                         wcs[wpos++] = c;
2091                 } else {
2092                         /* invalid utf-8 byte, non-printable unicode: convert to hex */
2093                         static const char *hex = "0123456789abcdef";
2094                         wcs[wpos++] = hex[c >> 4];
2095                         if (wpos < wcslen)
2096                                 wcs[wpos++] = hex[c & 0x0f];
2097                 }
2098         }
2099         wcs[wpos] = 0;
2100         return wpos;
2101 }
2102
2103 int xwcstoutf(char *utf, const wchar_t *wcs, size_t utflen)
2104 {
2105         if (!wcs || !utf || utflen < 1) {
2106                 errno = EINVAL;
2107                 return -1;
2108         }
2109         utflen = WideCharToMultiByte(CP_UTF8, 0, wcs, -1, utf, utflen, NULL, NULL);
2110         if (utflen)
2111                 return utflen - 1;
2112         errno = ERANGE;
2113         return -1;
2114 }
2115
2116 /*
2117  * Disable MSVCRT command line wildcard expansion (__getmainargs called from
2118  * mingw startup code, see init.c in mingw runtime).
2119  */
2120 int _CRT_glob = 0;
2121
2122 typedef struct {
2123         int newmode;
2124 } _startupinfo;
2125
2126 extern int __wgetmainargs(int *argc, wchar_t ***argv, wchar_t ***env, int glob,
2127                 _startupinfo *si);
2128
2129 static NORETURN void die_startup()
2130 {
2131         fputs("fatal: not enough memory for initialization", stderr);
2132         exit(128);
2133 }
2134
2135 static void *malloc_startup(size_t size)
2136 {
2137         void *result = malloc(size);
2138         if (!result)
2139                 die_startup();
2140         return result;
2141 }
2142
2143 static char *wcstoutfdup_startup(char *buffer, const wchar_t *wcs, size_t len)
2144 {
2145         len = xwcstoutf(buffer, wcs, len) + 1;
2146         return memcpy(malloc_startup(len), buffer, len);
2147 }
2148
2149 void mingw_startup()
2150 {
2151         int i, maxlen, argc;
2152         char *buffer;
2153         wchar_t **wenv, **wargv;
2154         _startupinfo si;
2155
2156         /* get wide char arguments and environment */
2157         si.newmode = 0;
2158         if (__wgetmainargs(&argc, &wargv, &wenv, _CRT_glob, &si) < 0)
2159                 die_startup();
2160
2161         /* determine size of argv and environ conversion buffer */
2162         maxlen = wcslen(_wpgmptr);
2163         for (i = 1; i < argc; i++)
2164                 maxlen = max(maxlen, wcslen(wargv[i]));
2165         for (i = 0; wenv[i]; i++)
2166                 maxlen = max(maxlen, wcslen(wenv[i]));
2167
2168         /*
2169          * nedmalloc can't free CRT memory, allocate resizable environment
2170          * list. Note that xmalloc / xmemdupz etc. call getenv, so we cannot
2171          * use it while initializing the environment itself.
2172          */
2173         environ_size = i + 1;
2174         environ_alloc = alloc_nr(environ_size * sizeof(char*));
2175         environ = malloc_startup(environ_alloc);
2176
2177         /* allocate buffer (wchar_t encodes to max 3 UTF-8 bytes) */
2178         maxlen = 3 * maxlen + 1;
2179         buffer = malloc_startup(maxlen);
2180
2181         /* convert command line arguments and environment to UTF-8 */
2182         __argv[0] = wcstoutfdup_startup(buffer, _wpgmptr, maxlen);
2183         for (i = 1; i < argc; i++)
2184                 __argv[i] = wcstoutfdup_startup(buffer, wargv[i], maxlen);
2185         for (i = 0; wenv[i]; i++)
2186                 environ[i] = wcstoutfdup_startup(buffer, wenv[i], maxlen);
2187         environ[i] = NULL;
2188         free(buffer);
2189
2190         /* sort environment for O(log n) getenv / putenv */
2191         qsort(environ, i, sizeof(char*), compareenv);
2192
2193         /* fix Windows specific environment settings */
2194
2195         /* on Windows it is TMP and TEMP */
2196         if (!getenv("TMPDIR")) {
2197                 const char *tmp = getenv("TMP");
2198                 if (!tmp)
2199                         tmp = getenv("TEMP");
2200                 if (tmp)
2201                         setenv("TMPDIR", tmp, 1);
2202         }
2203
2204         /* simulate TERM to enable auto-color (see color.c) */
2205         if (!getenv("TERM"))
2206                 setenv("TERM", "winansi", 1);
2207
2208         /* initialize critical section for waitpid pinfo_t list */
2209         InitializeCriticalSection(&pinfo_cs);
2210
2211         /* set up default file mode and file modes for stdin/out/err */
2212         _fmode = _O_BINARY;
2213         _setmode(_fileno(stdin), _O_BINARY);
2214         _setmode(_fileno(stdout), _O_BINARY);
2215         _setmode(_fileno(stderr), _O_BINARY);
2216
2217         /* initialize Unicode console */
2218         winansi_init();
2219 }