Make the MSVC projects use PDB/IDB files named after the project
[git/dscho.git] / compat / mingw.c
blob2424380cba4ea9cf88eb0f90fd3736f99ce39ce5
1 #include "../git-compat-util.h"
2 #include "win32.h"
3 #include <conio.h>
4 #include <winioctl.h>
5 #include <shellapi.h>
6 #include "../strbuf.h"
8 extern int hide_dotfiles;
9 unsigned int _CRT_fmode = _O_BINARY;
11 static int err_win_to_posix(DWORD winerr)
13 int error = ENOSYS;
14 switch(winerr) {
15 case ERROR_ACCESS_DENIED: error = EACCES; break;
16 case ERROR_ACCOUNT_DISABLED: error = EACCES; break;
17 case ERROR_ACCOUNT_RESTRICTION: error = EACCES; break;
18 case ERROR_ALREADY_ASSIGNED: error = EBUSY; break;
19 case ERROR_ALREADY_EXISTS: error = EEXIST; break;
20 case ERROR_ARITHMETIC_OVERFLOW: error = ERANGE; break;
21 case ERROR_BAD_COMMAND: error = EIO; break;
22 case ERROR_BAD_DEVICE: error = ENODEV; break;
23 case ERROR_BAD_DRIVER_LEVEL: error = ENXIO; break;
24 case ERROR_BAD_EXE_FORMAT: error = ENOEXEC; break;
25 case ERROR_BAD_FORMAT: error = ENOEXEC; break;
26 case ERROR_BAD_LENGTH: error = EINVAL; break;
27 case ERROR_BAD_PATHNAME: error = ENOENT; break;
28 case ERROR_BAD_PIPE: error = EPIPE; break;
29 case ERROR_BAD_UNIT: error = ENODEV; break;
30 case ERROR_BAD_USERNAME: error = EINVAL; break;
31 case ERROR_BROKEN_PIPE: error = EPIPE; break;
32 case ERROR_BUFFER_OVERFLOW: error = ENAMETOOLONG; break;
33 case ERROR_BUSY: error = EBUSY; break;
34 case ERROR_BUSY_DRIVE: error = EBUSY; break;
35 case ERROR_CALL_NOT_IMPLEMENTED: error = ENOSYS; break;
36 case ERROR_CANNOT_MAKE: error = EACCES; break;
37 case ERROR_CANTOPEN: error = EIO; break;
38 case ERROR_CANTREAD: error = EIO; break;
39 case ERROR_CANTWRITE: error = EIO; break;
40 case ERROR_CRC: error = EIO; break;
41 case ERROR_CURRENT_DIRECTORY: error = EACCES; break;
42 case ERROR_DEVICE_IN_USE: error = EBUSY; break;
43 case ERROR_DEV_NOT_EXIST: error = ENODEV; break;
44 case ERROR_DIRECTORY: error = EINVAL; break;
45 case ERROR_DIR_NOT_EMPTY: error = ENOTEMPTY; break;
46 case ERROR_DISK_CHANGE: error = EIO; break;
47 case ERROR_DISK_FULL: error = ENOSPC; break;
48 case ERROR_DRIVE_LOCKED: error = EBUSY; break;
49 case ERROR_ENVVAR_NOT_FOUND: error = EINVAL; break;
50 case ERROR_EXE_MARKED_INVALID: error = ENOEXEC; break;
51 case ERROR_FILENAME_EXCED_RANGE: error = ENAMETOOLONG; break;
52 case ERROR_FILE_EXISTS: error = EEXIST; break;
53 case ERROR_FILE_INVALID: error = ENODEV; break;
54 case ERROR_FILE_NOT_FOUND: error = ENOENT; break;
55 case ERROR_GEN_FAILURE: error = EIO; break;
56 case ERROR_HANDLE_DISK_FULL: error = ENOSPC; break;
57 case ERROR_INSUFFICIENT_BUFFER: error = ENOMEM; break;
58 case ERROR_INVALID_ACCESS: error = EACCES; break;
59 case ERROR_INVALID_ADDRESS: error = EFAULT; break;
60 case ERROR_INVALID_BLOCK: error = EFAULT; break;
61 case ERROR_INVALID_DATA: error = EINVAL; break;
62 case ERROR_INVALID_DRIVE: error = ENODEV; break;
63 case ERROR_INVALID_EXE_SIGNATURE: error = ENOEXEC; break;
64 case ERROR_INVALID_FLAGS: error = EINVAL; break;
65 case ERROR_INVALID_FUNCTION: error = ENOSYS; break;
66 case ERROR_INVALID_HANDLE: error = EBADF; break;
67 case ERROR_INVALID_LOGON_HOURS: error = EACCES; break;
68 case ERROR_INVALID_NAME: error = EINVAL; break;
69 case ERROR_INVALID_OWNER: error = EINVAL; break;
70 case ERROR_INVALID_PARAMETER: error = EINVAL; break;
71 case ERROR_INVALID_PASSWORD: error = EPERM; break;
72 case ERROR_INVALID_PRIMARY_GROUP: error = EINVAL; break;
73 case ERROR_INVALID_SIGNAL_NUMBER: error = EINVAL; break;
74 case ERROR_INVALID_TARGET_HANDLE: error = EIO; break;
75 case ERROR_INVALID_WORKSTATION: error = EACCES; break;
76 case ERROR_IO_DEVICE: error = EIO; break;
77 case ERROR_IO_INCOMPLETE: error = EINTR; break;
78 case ERROR_LOCKED: error = EBUSY; break;
79 case ERROR_LOCK_VIOLATION: error = EACCES; break;
80 case ERROR_LOGON_FAILURE: error = EACCES; break;
81 case ERROR_MAPPED_ALIGNMENT: error = EINVAL; break;
82 case ERROR_META_EXPANSION_TOO_LONG: error = E2BIG; break;
83 case ERROR_MORE_DATA: error = EPIPE; break;
84 case ERROR_NEGATIVE_SEEK: error = ESPIPE; break;
85 case ERROR_NOACCESS: error = EFAULT; break;
86 case ERROR_NONE_MAPPED: error = EINVAL; break;
87 case ERROR_NOT_ENOUGH_MEMORY: error = ENOMEM; break;
88 case ERROR_NOT_READY: error = EAGAIN; break;
89 case ERROR_NOT_SAME_DEVICE: error = EXDEV; break;
90 case ERROR_NO_DATA: error = EPIPE; break;
91 case ERROR_NO_MORE_SEARCH_HANDLES: error = EIO; break;
92 case ERROR_NO_PROC_SLOTS: error = EAGAIN; break;
93 case ERROR_NO_SUCH_PRIVILEGE: error = EACCES; break;
94 case ERROR_OPEN_FAILED: error = EIO; break;
95 case ERROR_OPEN_FILES: error = EBUSY; break;
96 case ERROR_OPERATION_ABORTED: error = EINTR; break;
97 case ERROR_OUTOFMEMORY: error = ENOMEM; break;
98 case ERROR_PASSWORD_EXPIRED: error = EACCES; break;
99 case ERROR_PATH_BUSY: error = EBUSY; break;
100 case ERROR_PATH_NOT_FOUND: error = ENOENT; break;
101 case ERROR_PIPE_BUSY: error = EBUSY; break;
102 case ERROR_PIPE_CONNECTED: error = EPIPE; break;
103 case ERROR_PIPE_LISTENING: error = EPIPE; break;
104 case ERROR_PIPE_NOT_CONNECTED: error = EPIPE; break;
105 case ERROR_PRIVILEGE_NOT_HELD: error = EACCES; break;
106 case ERROR_READ_FAULT: error = EIO; break;
107 case ERROR_SEEK: error = EIO; break;
108 case ERROR_SEEK_ON_DEVICE: error = ESPIPE; break;
109 case ERROR_SHARING_BUFFER_EXCEEDED: error = ENFILE; break;
110 case ERROR_SHARING_VIOLATION: error = EACCES; break;
111 case ERROR_STACK_OVERFLOW: error = ENOMEM; break;
112 case ERROR_SWAPERROR: error = ENOENT; break;
113 case ERROR_TOO_MANY_MODULES: error = EMFILE; break;
114 case ERROR_TOO_MANY_OPEN_FILES: error = EMFILE; break;
115 case ERROR_UNRECOGNIZED_MEDIA: error = ENXIO; break;
116 case ERROR_UNRECOGNIZED_VOLUME: error = ENODEV; break;
117 case ERROR_WAIT_NO_CHILDREN: error = ECHILD; break;
118 case ERROR_WRITE_FAULT: error = EIO; break;
119 case ERROR_WRITE_PROTECT: error = EROFS; break;
121 return error;
124 static int make_hidden(const char *path)
126 DWORD attribs = GetFileAttributes(path);
127 if (SetFileAttributes(path, FILE_ATTRIBUTE_HIDDEN | attribs))
128 return 0;
129 errno = err_win_to_posix(GetLastError());
130 return -1;
133 #undef mkdir
134 int mingw_mkdir(const char *path, int mode)
136 int ret = mkdir(path);
137 if (!ret && hide_dotfiles) {
139 * In Windows a file or dir starting with a dot is not
140 * automatically hidden. So lets mark it as hidden when
141 * such a directory is created.
143 const char *start = basename((char*)path);
144 if (*start == '.')
145 return make_hidden(path);
147 return ret;
150 #undef open
151 int mingw_open (const char *filename, int oflags, ...)
153 va_list args;
154 unsigned mode;
155 int fd;
157 va_start(args, oflags);
158 mode = va_arg(args, int);
159 va_end(args);
161 if (!strcmp(filename, "/dev/null"))
162 filename = "nul";
164 fd = open(filename, oflags | O_BINARY, mode);
166 if (fd < 0 && (oflags & O_CREAT) && errno == EACCES) {
167 DWORD attrs = GetFileAttributes(filename);
168 if (attrs != INVALID_FILE_ATTRIBUTES && (attrs & FILE_ATTRIBUTE_DIRECTORY))
169 errno = EISDIR;
171 if ((oflags & O_CREAT) && fd >= 0 && hide_dotfiles) {
173 * In Windows a file or dir starting with a dot is not
174 * automatically hidden. So lets mark it as hidden when
175 * such a file is created.
177 const char *start = basename((char*)filename);
178 if (*start == '.' && make_hidden(filename))
179 warning("Could not mark '%s' as hidden.", filename);
181 return fd;
184 #undef fopen
185 FILE *mingw_fopen (const char *filename, const char *mode)
187 int hide = 0;
188 FILE *file;
189 if (hide_dotfiles && basename((char*)filename)[0] == '.')
190 hide = access(filename, F_OK);
192 file = fopen(filename, mode);
194 * In Windows a file or dir starting with a dot is not
195 * automatically hidden. So lets mark it as hidden when
196 * such a file is created.
198 if (file && hide && make_hidden(filename))
199 warning("Could not mark '%s' as hidden.", filename);
200 return file;
203 static inline time_t filetime_to_time_t(const FILETIME *ft)
205 long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
206 winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
207 winTime /= 10000000; /* Nano to seconds resolution */
208 return (time_t)winTime;
212 * We keep the do_lstat code in a separate function to avoid recursion.
213 * When a path ends with a slash, the stat will fail with ENOENT. In
214 * this case, we strip the trailing slashes and stat again.
216 static int do_lstat(const char *file_name, struct stat *buf)
218 WIN32_FILE_ATTRIBUTE_DATA fdata;
220 if (!(errno = get_file_attr(file_name, &fdata))) {
221 buf->st_ino = 0;
222 buf->st_gid = 0;
223 buf->st_uid = 0;
224 buf->st_nlink = 1;
225 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
226 buf->st_size = fdata.nFileSizeLow |
227 (((off_t)fdata.nFileSizeHigh)<<32);
228 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
229 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
230 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
231 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
232 if (fdata.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) {
233 WIN32_FIND_DATAA findbuf;
234 HANDLE handle = FindFirstFileA(file_name, &findbuf);
235 if (handle != INVALID_HANDLE_VALUE) {
236 if ((findbuf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
237 (findbuf.dwReserved0 == IO_REPARSE_TAG_SYMLINK)) {
238 char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
239 buf->st_mode = S_IREAD | S_IFLNK;
240 if (!(findbuf.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
241 buf->st_mode |= S_IWRITE;
242 buf->st_size = readlink(file_name, buffer, MAXIMUM_REPARSE_DATA_BUFFER_SIZE);
244 FindClose(handle);
247 return 0;
249 return -1;
253 * We provide our own lstat/fstat functions, since the provided
254 * lstat/fstat functions are so slow. These stat functions are
255 * tailored for Git's usage (read: fast), and are not meant to be
256 * complete. Note that Git stat()s are redirected to mingw_lstat()
257 * too, since Windows doesn't really handle symlinks that well.
259 int mingw_lstat(const char *file_name, struct stat *buf)
261 int namelen;
262 static char alt_name[PATH_MAX];
264 if (!do_lstat(file_name, buf))
265 return 0;
268 * if file_name ended in a '/', Windows returned ENOENT;
269 * try again without trailing slashes
271 if (errno != ENOENT)
272 return -1;
274 namelen = strlen(file_name);
275 if (namelen && file_name[namelen-1] != '/')
276 return -1;
277 while (namelen && file_name[namelen-1] == '/')
278 --namelen;
279 if (!namelen || namelen >= PATH_MAX)
280 return -1;
282 memcpy(alt_name, file_name, namelen);
283 alt_name[namelen] = 0;
284 return do_lstat(alt_name, buf);
287 #undef fstat
288 int mingw_fstat(int fd, struct stat *buf)
290 HANDLE fh = (HANDLE)_get_osfhandle(fd);
291 BY_HANDLE_FILE_INFORMATION fdata;
293 if (fh == INVALID_HANDLE_VALUE) {
294 errno = EBADF;
295 return -1;
297 /* direct non-file handles to MS's fstat() */
298 if (GetFileType(fh) != FILE_TYPE_DISK)
299 return _fstati64(fd, buf);
301 if (GetFileInformationByHandle(fh, &fdata)) {
302 buf->st_ino = 0;
303 buf->st_gid = 0;
304 buf->st_uid = 0;
305 buf->st_nlink = 1;
306 buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
307 buf->st_size = fdata.nFileSizeLow |
308 (((off_t)fdata.nFileSizeHigh)<<32);
309 buf->st_dev = buf->st_rdev = 0; /* not used by Git */
310 buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
311 buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
312 buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
313 return 0;
315 errno = EBADF;
316 return -1;
319 static inline void time_t_to_filetime(time_t t, FILETIME *ft)
321 long long winTime = t * 10000000LL + 116444736000000000LL;
322 ft->dwLowDateTime = winTime;
323 ft->dwHighDateTime = winTime >> 32;
326 int mingw_utime (const char *file_name, const struct utimbuf *times)
328 FILETIME mft, aft;
329 int fh, rc;
331 /* must have write permission */
332 if ((fh = open(file_name, O_RDWR | O_BINARY)) < 0)
333 return -1;
335 time_t_to_filetime(times->modtime, &mft);
336 time_t_to_filetime(times->actime, &aft);
337 if (!SetFileTime((HANDLE)_get_osfhandle(fh), NULL, &aft, &mft)) {
338 errno = EINVAL;
339 rc = -1;
340 } else
341 rc = 0;
342 close(fh);
343 return rc;
346 unsigned int sleep (unsigned int seconds)
348 Sleep(seconds*1000);
349 return 0;
352 int mkstemp(char *template)
354 char *filename = mktemp(template);
355 if (filename == NULL)
356 return -1;
357 return open(filename, O_RDWR | O_CREAT | O_BINARY, 0600);
360 int gettimeofday(struct timeval *tv, void *tz)
362 SYSTEMTIME st;
363 struct tm tm;
364 GetSystemTime(&st);
365 tm.tm_year = st.wYear-1900;
366 tm.tm_mon = st.wMonth-1;
367 tm.tm_mday = st.wDay;
368 tm.tm_hour = st.wHour;
369 tm.tm_min = st.wMinute;
370 tm.tm_sec = st.wSecond;
371 tv->tv_sec = tm_to_time_t(&tm);
372 if (tv->tv_sec < 0)
373 return -1;
374 tv->tv_usec = st.wMilliseconds*1000;
375 return 0;
378 int pipe(int filedes[2])
380 int fd;
381 HANDLE h[2], parent;
383 if (_pipe(filedes, 8192, 0) < 0)
384 return -1;
386 parent = GetCurrentProcess();
388 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[0]),
389 parent, &h[0], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
390 close(filedes[0]);
391 close(filedes[1]);
392 return -1;
394 if (!DuplicateHandle (parent, (HANDLE)_get_osfhandle(filedes[1]),
395 parent, &h[1], 0, FALSE, DUPLICATE_SAME_ACCESS)) {
396 close(filedes[0]);
397 close(filedes[1]);
398 CloseHandle(h[0]);
399 return -1;
401 fd = _open_osfhandle((int)h[0], O_NOINHERIT);
402 if (fd < 0) {
403 close(filedes[0]);
404 close(filedes[1]);
405 CloseHandle(h[0]);
406 CloseHandle(h[1]);
407 return -1;
409 close(filedes[0]);
410 filedes[0] = fd;
411 fd = _open_osfhandle((int)h[1], O_NOINHERIT);
412 if (fd < 0) {
413 close(filedes[0]);
414 close(filedes[1]);
415 CloseHandle(h[1]);
416 return -1;
418 close(filedes[1]);
419 filedes[1] = fd;
420 return 0;
423 int poll(struct pollfd *ufds, unsigned int nfds, int timeout)
425 int i, pending;
427 if (timeout >= 0) {
428 if (nfds == 0) {
429 Sleep(timeout);
430 return 0;
432 return errno = EINVAL, error("poll timeout not supported");
436 * When there is only one fd to wait for, then we pretend that
437 * input is available and let the actual wait happen when the
438 * caller invokes read().
440 if (nfds == 1) {
441 if (!(ufds[0].events & POLLIN))
442 return errno = EINVAL, error("POLLIN not set");
443 ufds[0].revents = POLLIN;
444 return 0;
447 repeat:
448 pending = 0;
449 for (i = 0; i < nfds; i++) {
450 DWORD avail = 0;
451 HANDLE h = (HANDLE) _get_osfhandle(ufds[i].fd);
452 if (h == INVALID_HANDLE_VALUE)
453 return -1; /* errno was set */
455 if (!(ufds[i].events & POLLIN))
456 return errno = EINVAL, error("POLLIN not set");
458 /* this emulation works only for pipes */
459 if (!PeekNamedPipe(h, NULL, 0, NULL, &avail, NULL)) {
460 int err = GetLastError();
461 if (err == ERROR_BROKEN_PIPE) {
462 ufds[i].revents = POLLHUP;
463 pending++;
464 } else {
465 errno = EINVAL;
466 return error("PeekNamedPipe failed,"
467 " GetLastError: %u", err);
469 } else if (avail) {
470 ufds[i].revents = POLLIN;
471 pending++;
472 } else
473 ufds[i].revents = 0;
475 if (!pending) {
477 * The only times that we spin here is when the process
478 * that is connected through the pipes is waiting for
479 * its own input data to become available. But since
480 * the process (pack-objects) is itself CPU intensive,
481 * it will happily pick up the time slice that we are
482 * relinquishing here.
484 Sleep(0);
485 goto repeat;
487 return 0;
490 struct tm *gmtime_r(const time_t *timep, struct tm *result)
492 /* gmtime() in MSVCRT.DLL is thread-safe, but not reentrant */
493 memcpy(result, gmtime(timep), sizeof(struct tm));
494 return result;
497 struct tm *localtime_r(const time_t *timep, struct tm *result)
499 /* localtime() in MSVCRT.DLL is thread-safe, but not reentrant */
500 memcpy(result, localtime(timep), sizeof(struct tm));
501 return result;
504 #undef getcwd
505 char *mingw_getcwd(char *pointer, int len)
507 int i;
508 char *ret = getcwd(pointer, len);
509 if (!ret)
510 return ret;
511 for (i = 0; pointer[i]; i++)
512 if (pointer[i] == '\\')
513 pointer[i] = '/';
514 return ret;
517 #undef getenv
518 char *mingw_getenv(const char *name)
520 char *result = getenv(name);
521 if (!result && !strcmp(name, "TMPDIR")) {
522 /* on Windows it is TMP and TEMP */
523 result = getenv("TMP");
524 if (!result)
525 result = getenv("TEMP");
527 return result;
531 * See http://msdn2.microsoft.com/en-us/library/17w5ykft(vs.71).aspx
532 * (Parsing C++ Command-Line Arguments)
534 static const char *quote_arg(const char *arg)
536 /* count chars to quote */
537 int len = 0, n = 0;
538 int force_quotes = 0;
539 char *q, *d;
540 const char *p = arg;
541 if (!*p) force_quotes = 1;
542 while (*p) {
543 if (isspace(*p) || *p == '*' || *p == '?' || *p == '{' || *p == '\'')
544 force_quotes = 1;
545 else if (*p == '"')
546 n++;
547 else if (*p == '\\') {
548 int count = 0;
549 while (*p == '\\') {
550 count++;
551 p++;
552 len++;
554 if (*p == '"')
555 n += count*2 + 1;
556 continue;
558 len++;
559 p++;
561 if (!force_quotes && n == 0)
562 return arg;
564 /* insert \ where necessary */
565 d = q = xmalloc(len+n+3);
566 *d++ = '"';
567 while (*arg) {
568 if (*arg == '"')
569 *d++ = '\\';
570 else if (*arg == '\\') {
571 int count = 0;
572 while (*arg == '\\') {
573 count++;
574 *d++ = *arg++;
576 if (*arg == '"') {
577 while (count-- > 0)
578 *d++ = '\\';
579 *d++ = '\\';
582 *d++ = *arg++;
584 *d++ = '"';
585 *d++ = 0;
586 return q;
589 static const char *parse_interpreter(const char *cmd)
591 static char buf[100];
592 char *p, *opt;
593 int n, fd;
595 /* don't even try a .exe */
596 n = strlen(cmd);
597 if (n >= 4 && !strcasecmp(cmd+n-4, ".exe"))
598 return NULL;
600 fd = open(cmd, O_RDONLY);
601 if (fd < 0)
602 return NULL;
603 n = read(fd, buf, sizeof(buf)-1);
604 close(fd);
605 if (n < 4) /* at least '#!/x' and not error */
606 return NULL;
608 if (buf[0] != '#' || buf[1] != '!')
609 return NULL;
610 buf[n] = '\0';
611 p = buf + strcspn(buf, "\r\n");
612 if (!*p)
613 return NULL;
615 *p = '\0';
616 if (!(p = strrchr(buf+2, '/')) && !(p = strrchr(buf+2, '\\')))
617 return NULL;
618 /* strip options */
619 if ((opt = strchr(p+1, ' ')))
620 *opt = '\0';
621 return p+1;
625 * Splits the PATH into parts.
627 static char **get_path_split(void)
629 char *p, **path, *envpath = getenv("PATH");
630 int i, n = 0;
632 if (!envpath || !*envpath)
633 return NULL;
635 envpath = xstrdup(envpath);
636 p = envpath;
637 while (p) {
638 char *dir = p;
639 p = strchr(p, ';');
640 if (p) *p++ = '\0';
641 if (*dir) { /* not earlier, catches series of ; */
642 ++n;
645 if (!n)
646 return NULL;
648 path = xmalloc((n+1)*sizeof(char *));
649 p = envpath;
650 i = 0;
651 do {
652 if (*p)
653 path[i++] = xstrdup(p);
654 p = p+strlen(p)+1;
655 } while (i < n);
656 path[i] = NULL;
658 free(envpath);
660 return path;
663 static void free_path_split(char **path)
665 char **p = path;
667 if (!path)
668 return;
670 while (*p)
671 free(*p++);
672 free(path);
676 * exe_only means that we only want to detect .exe files, but not scripts
677 * (which do not have an extension)
679 static char *lookup_prog(const char *dir, const char *cmd, int isexe, int exe_only)
681 char path[MAX_PATH];
682 snprintf(path, sizeof(path), "%s/%s.exe", dir, cmd);
684 if (!isexe && access(path, F_OK) == 0)
685 return xstrdup(path);
686 path[strlen(path)-4] = '\0';
687 if ((!exe_only || isexe) && access(path, F_OK) == 0)
688 if (!(GetFileAttributes(path) & FILE_ATTRIBUTE_DIRECTORY))
689 return xstrdup(path);
690 return NULL;
694 * Determines the absolute path of cmd using the the split path in path.
695 * If cmd contains a slash or backslash, no lookup is performed.
697 static char *path_lookup(const char *cmd, char **path, int exe_only)
699 char *prog = NULL;
700 int len = strlen(cmd);
701 int isexe = len >= 4 && !strcasecmp(cmd+len-4, ".exe");
703 if (strchr(cmd, '/') || strchr(cmd, '\\'))
704 prog = xstrdup(cmd);
706 while (!prog && *path)
707 prog = lookup_prog(*path++, cmd, isexe, exe_only);
709 return prog;
712 static int env_compare(const void *a, const void *b)
714 char *const *ea = a;
715 char *const *eb = b;
716 return strcasecmp(*ea, *eb);
719 static pid_t mingw_spawnve(const char *cmd, const char **argv, char **env,
720 int prepend_cmd)
722 STARTUPINFO si;
723 PROCESS_INFORMATION pi;
724 struct strbuf envblk, args;
725 unsigned flags;
726 BOOL ret;
728 /* Determine whether or not we are associated to a console */
729 HANDLE cons = CreateFile("CONOUT$", GENERIC_WRITE,
730 FILE_SHARE_WRITE, NULL, OPEN_EXISTING,
731 FILE_ATTRIBUTE_NORMAL, NULL);
732 if (cons == INVALID_HANDLE_VALUE) {
734 * There is no console associated with this process.
735 * Since the child is a console process, Windows
736 * would normally create a console window. But
737 * since we'll be redirecting std streams, we do
738 * not need the console.
739 * It is necessary to use DETACHED_PROCESS
740 * instead of CREATE_NO_WINDOW to make ssh
741 * recognize that it has no console.
743 flags = DETACHED_PROCESS;
744 } else {
746 * There is already a console. If we specified
747 * DETACHED_PROCESS here, too, Windows would
748 * disassociate the child from the console.
749 * The same is true for CREATE_NO_WINDOW.
750 * Go figure!
752 flags = 0;
753 CloseHandle(cons);
755 memset(&si, 0, sizeof(si));
756 si.cb = sizeof(si);
757 si.dwFlags = STARTF_USESTDHANDLES;
758 si.hStdInput = (HANDLE) _get_osfhandle(0);
759 si.hStdOutput = (HANDLE) _get_osfhandle(1);
760 si.hStdError = (HANDLE) _get_osfhandle(2);
762 /* concatenate argv, quoting args as we go */
763 strbuf_init(&args, 0);
764 if (prepend_cmd) {
765 char *quoted = (char *)quote_arg(cmd);
766 strbuf_addstr(&args, quoted);
767 if (quoted != cmd)
768 free(quoted);
770 for (; *argv; argv++) {
771 char *quoted = (char *)quote_arg(*argv);
772 if (*args.buf)
773 strbuf_addch(&args, ' ');
774 strbuf_addstr(&args, quoted);
775 if (quoted != *argv)
776 free(quoted);
779 if (env) {
780 int count = 0;
781 char **e, **sorted_env;
783 for (e = env; *e; e++)
784 count++;
786 /* environment must be sorted */
787 sorted_env = xmalloc(sizeof(*sorted_env) * (count + 1));
788 memcpy(sorted_env, env, sizeof(*sorted_env) * (count + 1));
789 qsort(sorted_env, count, sizeof(*sorted_env), env_compare);
791 strbuf_init(&envblk, 0);
792 for (e = sorted_env; *e; e++) {
793 strbuf_addstr(&envblk, *e);
794 strbuf_addch(&envblk, '\0');
796 free(sorted_env);
799 memset(&pi, 0, sizeof(pi));
800 ret = CreateProcess(cmd, args.buf, NULL, NULL, TRUE, flags,
801 env ? envblk.buf : NULL, NULL, &si, &pi);
803 if (env)
804 strbuf_release(&envblk);
805 strbuf_release(&args);
807 if (!ret) {
808 errno = ENOENT;
809 return -1;
811 CloseHandle(pi.hThread);
812 return (pid_t)pi.hProcess;
815 pid_t mingw_spawnvpe(const char *cmd, const char **argv, char **env)
817 pid_t pid;
818 char **path = get_path_split();
819 char *prog = path_lookup(cmd, path, 0);
821 if (!prog) {
822 errno = ENOENT;
823 pid = -1;
825 else {
826 const char *interpr = parse_interpreter(prog);
828 if (interpr) {
829 const char *argv0 = argv[0];
830 char *iprog = path_lookup(interpr, path, 1);
831 argv[0] = prog;
832 if (!iprog) {
833 errno = ENOENT;
834 pid = -1;
836 else {
837 pid = mingw_spawnve(iprog, argv, env, 1);
838 free(iprog);
840 argv[0] = argv0;
842 else
843 pid = mingw_spawnve(prog, argv, env, 0);
844 free(prog);
846 free_path_split(path);
847 return pid;
850 static int try_shell_exec(const char *cmd, char *const *argv, char **env)
852 const char *interpr = parse_interpreter(cmd);
853 char **path;
854 char *prog;
855 int pid = 0;
857 if (!interpr)
858 return 0;
859 path = get_path_split();
860 prog = path_lookup(interpr, path, 1);
861 if (prog) {
862 int argc = 0;
863 const char **argv2;
864 while (argv[argc]) argc++;
865 argv2 = xmalloc(sizeof(*argv) * (argc+1));
866 argv2[0] = (char *)cmd; /* full path to the script file */
867 memcpy(&argv2[1], &argv[1], sizeof(*argv) * argc);
868 pid = mingw_spawnve(prog, argv2, env, 1);
869 if (pid >= 0) {
870 int status;
871 if (waitpid(pid, &status, 0) < 0)
872 status = 255;
873 exit(status);
875 pid = 1; /* indicate that we tried but failed */
876 free(prog);
877 free(argv2);
879 free_path_split(path);
880 return pid;
883 static void mingw_execve(const char *cmd, char *const *argv, char *const *env)
885 /* check if git_command is a shell script */
886 if (!try_shell_exec(cmd, argv, (char **)env)) {
887 int pid, status;
889 pid = mingw_spawnve(cmd, (const char **)argv, (char **)env, 0);
890 if (pid < 0)
891 return;
892 if (waitpid(pid, &status, 0) < 0)
893 status = 255;
894 exit(status);
898 void mingw_execvp(const char *cmd, char *const *argv)
900 char **path = get_path_split();
901 char *prog = path_lookup(cmd, path, 0);
903 if (prog) {
904 mingw_execve(prog, argv, environ);
905 free(prog);
906 } else
907 errno = ENOENT;
909 free_path_split(path);
912 static char **copy_environ(void)
914 char **env;
915 int i = 0;
916 while (environ[i])
917 i++;
918 env = xmalloc((i+1)*sizeof(*env));
919 for (i = 0; environ[i]; i++)
920 env[i] = xstrdup(environ[i]);
921 env[i] = NULL;
922 return env;
925 void free_environ(char **env)
927 int i;
928 for (i = 0; env[i]; i++)
929 free(env[i]);
930 free(env);
933 static int lookup_env(char **env, const char *name, size_t nmln)
935 int i;
937 for (i = 0; env[i]; i++) {
938 if (0 == strncmp(env[i], name, nmln)
939 && '=' == env[i][nmln])
940 /* matches */
941 return i;
943 return -1;
947 * If name contains '=', then sets the variable, otherwise it unsets it
949 static char **env_setenv(char **env, const char *name)
951 char *eq = strchrnul(name, '=');
952 int i = lookup_env(env, name, eq-name);
954 if (i < 0) {
955 if (*eq) {
956 for (i = 0; env[i]; i++)
958 env = xrealloc(env, (i+2)*sizeof(*env));
959 env[i] = xstrdup(name);
960 env[i+1] = NULL;
963 else {
964 free(env[i]);
965 if (*eq)
966 env[i] = xstrdup(name);
967 else
968 for (; env[i]; i++)
969 env[i] = env[i+1];
971 return env;
975 * Copies global environ and adjusts variables as specified by vars.
977 char **make_augmented_environ(const char *const *vars)
979 char **env = copy_environ();
981 while (*vars)
982 env = env_setenv(env, *vars++);
983 return env;
986 /* this is the first function to call into WS_32; initialize it */
987 #undef gethostbyname
988 struct hostent *mingw_gethostbyname(const char *host)
990 WSADATA wsa;
992 if (WSAStartup(MAKEWORD(2,2), &wsa))
993 die("unable to initialize winsock subsystem, error %d",
994 WSAGetLastError());
995 atexit((void(*)(void)) WSACleanup);
996 return gethostbyname(host);
999 int mingw_socket(int domain, int type, int protocol)
1001 int sockfd;
1002 SOCKET s = WSASocket(domain, type, protocol, NULL, 0, 0);
1003 if (s == INVALID_SOCKET) {
1005 * WSAGetLastError() values are regular BSD error codes
1006 * biased by WSABASEERR.
1007 * However, strerror() does not know about networking
1008 * specific errors, which are values beginning at 38 or so.
1009 * Therefore, we choose to leave the biased error code
1010 * in errno so that _if_ someone looks up the code somewhere,
1011 * then it is at least the number that are usually listed.
1013 errno = WSAGetLastError();
1014 return -1;
1016 /* convert into a file descriptor */
1017 if ((sockfd = _open_osfhandle(s, O_RDWR|O_BINARY)) < 0) {
1018 closesocket(s);
1019 return error("unable to make a socket file descriptor: %s",
1020 strerror(errno));
1022 return sockfd;
1025 #undef connect
1026 int mingw_connect(int sockfd, struct sockaddr *sa, size_t sz)
1028 SOCKET s = (SOCKET)_get_osfhandle(sockfd);
1029 return connect(s, sa, sz);
1032 #undef rename
1033 int mingw_rename(const char *pold, const char *pnew)
1035 DWORD attrs, gle;
1036 int tries = 0;
1037 static const int delay[] = { 0, 1, 10, 20, 40 };
1040 * Try native rename() first to get errno right.
1041 * It is based on MoveFile(), which cannot overwrite existing files.
1043 if (!rename(pold, pnew))
1044 return 0;
1045 if (errno != EEXIST)
1046 return -1;
1047 repeat:
1048 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1049 return 0;
1050 /* TODO: translate more errors */
1051 gle = GetLastError();
1052 if (gle == ERROR_ACCESS_DENIED &&
1053 (attrs = GetFileAttributes(pnew)) != INVALID_FILE_ATTRIBUTES) {
1054 if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
1055 errno = EISDIR;
1056 return -1;
1058 if ((attrs & FILE_ATTRIBUTE_READONLY) &&
1059 SetFileAttributes(pnew, attrs & ~FILE_ATTRIBUTE_READONLY)) {
1060 if (MoveFileEx(pold, pnew, MOVEFILE_REPLACE_EXISTING))
1061 return 0;
1062 gle = GetLastError();
1063 /* revert file attributes on failure */
1064 SetFileAttributes(pnew, attrs);
1067 if (tries < ARRAY_SIZE(delay) && gle == ERROR_ACCESS_DENIED) {
1069 * We assume that some other process had the source or
1070 * destination file open at the wrong moment and retry.
1071 * In order to give the other process a higher chance to
1072 * complete its operation, we give up our time slice now.
1073 * If we have to retry again, we do sleep a bit.
1075 Sleep(delay[tries]);
1076 tries++;
1077 goto repeat;
1079 errno = EACCES;
1080 return -1;
1083 struct passwd *getpwuid(int uid)
1085 static char user_name[100];
1086 static struct passwd p;
1088 DWORD len = sizeof(user_name);
1089 if (!GetUserName(user_name, &len))
1090 return NULL;
1091 p.pw_name = user_name;
1092 p.pw_gecos = "unknown";
1093 p.pw_dir = NULL;
1094 return &p;
1097 static HANDLE timer_event;
1098 static HANDLE timer_thread;
1099 static int timer_interval;
1100 static int one_shot;
1101 static sig_handler_t timer_fn = SIG_DFL;
1104 * The timer works like this:
1105 * The thread, ticktack(), is a trivial routine that most of the time
1106 * only waits to receive the signal to terminate. The main thread tells
1107 * the thread to terminate by setting the timer_event to the signalled
1108 * state.
1109 * But ticktack() interrupts the wait state after the timer's interval
1110 * length to call the signal handler.
1113 static unsigned __stdcall ticktack(void *dummy)
1115 while (WaitForSingleObject(timer_event, timer_interval) == WAIT_TIMEOUT) {
1116 if (timer_fn == SIG_DFL)
1117 die("Alarm");
1118 if (timer_fn != SIG_IGN)
1119 timer_fn(SIGALRM);
1120 if (one_shot)
1121 break;
1123 return 0;
1126 static int start_timer_thread(void)
1128 timer_event = CreateEvent(NULL, FALSE, FALSE, NULL);
1129 if (timer_event) {
1130 timer_thread = (HANDLE) _beginthreadex(NULL, 0, ticktack, NULL, 0, NULL);
1131 if (!timer_thread )
1132 return errno = ENOMEM,
1133 error("cannot start timer thread");
1134 } else
1135 return errno = ENOMEM,
1136 error("cannot allocate resources for timer");
1137 return 0;
1140 static void stop_timer_thread(void)
1142 if (timer_event)
1143 SetEvent(timer_event); /* tell thread to terminate */
1144 if (timer_thread) {
1145 int rc = WaitForSingleObject(timer_thread, 1000);
1146 if (rc == WAIT_TIMEOUT)
1147 error("timer thread did not terminate timely");
1148 else if (rc != WAIT_OBJECT_0)
1149 error("waiting for timer thread failed: %lu",
1150 GetLastError());
1151 CloseHandle(timer_thread);
1153 if (timer_event)
1154 CloseHandle(timer_event);
1155 timer_event = NULL;
1156 timer_thread = NULL;
1159 static inline int is_timeval_eq(const struct timeval *i1, const struct timeval *i2)
1161 return i1->tv_sec == i2->tv_sec && i1->tv_usec == i2->tv_usec;
1164 int setitimer(int type, struct itimerval *in, struct itimerval *out)
1166 static const struct timeval zero;
1167 static int atexit_done;
1169 if (out != NULL)
1170 return errno = EINVAL,
1171 error("setitimer param 3 != NULL not implemented");
1172 if (!is_timeval_eq(&in->it_interval, &zero) &&
1173 !is_timeval_eq(&in->it_interval, &in->it_value))
1174 return errno = EINVAL,
1175 error("setitimer: it_interval must be zero or eq it_value");
1177 if (timer_thread)
1178 stop_timer_thread();
1180 if (is_timeval_eq(&in->it_value, &zero) &&
1181 is_timeval_eq(&in->it_interval, &zero))
1182 return 0;
1184 timer_interval = in->it_value.tv_sec * 1000 + in->it_value.tv_usec / 1000;
1185 one_shot = is_timeval_eq(&in->it_interval, &zero);
1186 if (!atexit_done) {
1187 atexit(stop_timer_thread);
1188 atexit_done = 1;
1190 return start_timer_thread();
1193 int sigaction(int sig, struct sigaction *in, struct sigaction *out)
1195 if (sig != SIGALRM)
1196 return errno = EINVAL,
1197 error("sigaction only implemented for SIGALRM");
1198 if (out != NULL)
1199 return errno = EINVAL,
1200 error("sigaction: param 3 != NULL not implemented");
1202 timer_fn = in->sa_handler;
1203 return 0;
1206 #undef signal
1207 sig_handler_t mingw_signal(int sig, sig_handler_t handler)
1209 sig_handler_t old = timer_fn;
1210 if (sig != SIGALRM)
1211 return signal(sig, handler);
1212 timer_fn = handler;
1213 return old;
1216 static const char *make_backslash_path(const char *path, char *buf)
1218 char *c;
1220 if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
1221 die("Too long path: %.*s", 60, path);
1223 for (c = buf; *c; c++) {
1224 if (*c == '/')
1225 *c = '\\';
1227 return buf;
1230 void mingw_open_html(const char *unixpath)
1232 char buf[PATH_MAX + 1];
1233 const char *htmlpath = make_backslash_path(unixpath, buf);
1234 printf("Launching default browser to display HTML ...\n");
1235 ShellExecute(NULL, "open", htmlpath, NULL, "\\", 0);
1238 int link(const char *oldpath, const char *newpath)
1240 typedef BOOL (WINAPI *T)(const char*, const char*, LPSECURITY_ATTRIBUTES);
1241 static T create_hard_link = NULL;
1242 if (!create_hard_link) {
1243 create_hard_link = (T) GetProcAddress(
1244 GetModuleHandle("kernel32.dll"), "CreateHardLinkA");
1245 if (!create_hard_link)
1246 create_hard_link = (T)-1;
1248 if (create_hard_link == (T)-1) {
1249 errno = ENOSYS;
1250 return -1;
1252 if (!create_hard_link(newpath, oldpath, NULL)) {
1253 errno = err_win_to_posix(GetLastError());
1254 return -1;
1256 return 0;
1259 int symlink(const char *oldpath, const char *newpath)
1261 typedef BOOL WINAPI (*symlink_fn)(const char*, const char*, DWORD);
1262 static symlink_fn create_symbolic_link = NULL;
1263 char buf[PATH_MAX + 1];
1265 if (!create_symbolic_link) {
1266 create_symbolic_link = (symlink_fn) GetProcAddress(
1267 GetModuleHandle("kernel32.dll"), "CreateSymbolicLinkA");
1268 if (!create_symbolic_link)
1269 create_symbolic_link = (symlink_fn)-1;
1271 if (create_symbolic_link == (symlink_fn)-1) {
1272 errno = ENOSYS;
1273 return -1;
1276 if (!create_symbolic_link(newpath, make_backslash_path(oldpath, buf), 0)) {
1277 errno = err_win_to_posix(GetLastError());
1278 return -1;
1280 return 0;
1283 int readlink(const char *path, char *buf, size_t bufsiz)
1285 HANDLE handle = CreateFile(path, GENERIC_READ,
1286 FILE_SHARE_READ|FILE_SHARE_WRITE|FILE_SHARE_DELETE,
1287 NULL, OPEN_EXISTING,
1288 FILE_FLAG_BACKUP_SEMANTICS | FILE_FLAG_OPEN_REPARSE_POINT,
1289 NULL);
1291 if (handle != INVALID_HANDLE_VALUE) {
1292 unsigned char buffer[MAXIMUM_REPARSE_DATA_BUFFER_SIZE];
1293 DWORD dummy = 0;
1294 if (DeviceIoControl(handle, FSCTL_GET_REPARSE_POINT, NULL, 0, buffer,
1295 MAXIMUM_REPARSE_DATA_BUFFER_SIZE, &dummy, NULL)) {
1296 REPARSE_DATA_BUFFER *b = (REPARSE_DATA_BUFFER *) buffer;
1297 if (b->ReparseTag == IO_REPARSE_TAG_SYMLINK) {
1298 int len = b->SymbolicLinkReparseBuffer.SubstituteNameLength / sizeof(wchar_t);
1299 int offset = b->SymbolicLinkReparseBuffer.SubstituteNameOffset / sizeof(wchar_t);
1300 int i;
1301 snprintf(buf, bufsiz, "%*ls", len, & b->SymbolicLinkReparseBuffer.PathBuffer[offset]);
1302 for (i = 0; i < len; i++)
1303 if (buf[i] == '\\')
1304 buf[i] = '/';
1305 CloseHandle(handle);
1306 return len;
1310 CloseHandle(handle);
1313 errno = EINVAL;
1314 return -1;
1317 char *getpass(const char *prompt)
1319 struct strbuf buf = STRBUF_INIT;
1321 fputs(prompt, stderr);
1322 for (;;) {
1323 char c = _getch();
1324 if (c == '\r' || c == '\n')
1325 break;
1326 strbuf_addch(&buf, c);
1328 fputs("\n", stderr);
1329 return strbuf_detach(&buf, NULL);
1332 #ifndef NO_MINGW_REPLACE_READDIR
1333 /* MinGW readdir implementation to avoid extra lstats for Git */
1334 struct mingw_DIR
1336 struct _finddata_t dd_dta; /* disk transfer area for this dir */
1337 struct mingw_dirent dd_dir; /* Our own implementation, including d_type */
1338 long dd_handle; /* _findnext handle */
1339 int dd_stat; /* 0 = next entry to read is first entry, -1 = off the end, positive = 0 based index of next entry */
1340 char dd_name[1]; /* given path for dir with search pattern (struct is extended) */
1343 struct dirent *mingw_readdir(DIR *dir)
1345 WIN32_FIND_DATAA buf;
1346 HANDLE handle;
1347 struct mingw_DIR *mdir = (struct mingw_DIR*)dir;
1349 if (!dir->dd_handle) {
1350 errno = EBADF; /* No set_errno for mingw */
1351 return NULL;
1354 if (dir->dd_handle == (long)INVALID_HANDLE_VALUE && dir->dd_stat == 0)
1356 DWORD lasterr;
1357 handle = FindFirstFileA(dir->dd_name, &buf);
1358 lasterr = GetLastError();
1359 dir->dd_handle = (long)handle;
1360 if (handle == INVALID_HANDLE_VALUE && (lasterr != ERROR_NO_MORE_FILES)) {
1361 errno = err_win_to_posix(lasterr);
1362 return NULL;
1364 } else if (dir->dd_handle == (long)INVALID_HANDLE_VALUE) {
1365 return NULL;
1366 } else if (!FindNextFileA((HANDLE)dir->dd_handle, &buf)) {
1367 DWORD lasterr = GetLastError();
1368 FindClose((HANDLE)dir->dd_handle);
1369 dir->dd_handle = (long)INVALID_HANDLE_VALUE;
1371 * POSIX says you shouldn't set errno when readdir can't
1372 * find any more files; so, if another error we leave it set.
1374 if (lasterr != ERROR_NO_MORE_FILES)
1375 errno = err_win_to_posix(lasterr);
1376 return NULL;
1379 /* We get here if `buf' contains valid data. */
1380 strcpy(dir->dd_dir.d_name, buf.cFileName);
1381 ++dir->dd_stat;
1383 /* Set file type, based on WIN32_FIND_DATA */
1384 mdir->dd_dir.d_type = 0;
1385 if ((buf.dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) &&
1386 (buf.dwReserved0 == IO_REPARSE_TAG_SYMLINK))
1387 mdir->dd_dir.d_type |= DT_LNK;
1388 else if (buf.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
1389 mdir->dd_dir.d_type |= DT_DIR;
1390 else
1391 mdir->dd_dir.d_type |= DT_REG;
1393 return (struct dirent*)&dir->dd_dir;
1395 #endif // !NO_MINGW_REPLACE_READDIR