Merge branch 'js/mingw-getcwd'
[git/git.git] / compat / mingw.c
index 44264fe..6c3c4ca 100644 (file)
@@ -203,6 +203,31 @@ static int ask_yes_no_if_possible(const char *format, ...)
        }
 }
 
+/* Normalizes NT paths as returned by some low-level APIs. */
+static wchar_t *normalize_ntpath(wchar_t *wbuf)
+{
+       int i;
+       /* fix absolute path prefixes */
+       if (wbuf[0] == '\\') {
+               /* strip NT namespace prefixes */
+               if (!wcsncmp(wbuf, L"\\??\\", 4) ||
+                   !wcsncmp(wbuf, L"\\\\?\\", 4))
+                       wbuf += 4;
+               else if (!wcsnicmp(wbuf, L"\\DosDevices\\", 12))
+                       wbuf += 12;
+               /* replace remaining '...UNC\' with '\\' */
+               if (!wcsnicmp(wbuf, L"UNC\\", 4)) {
+                       wbuf += 2;
+                       *wbuf = '\\';
+               }
+       }
+       /* convert backslashes to slashes */
+       for (i = 0; wbuf[i]; i++)
+               if (wbuf[i] == '\\')
+                       wbuf[i] = '/';
+       return wbuf;
+}
+
 int mingw_unlink(const char *pathname)
 {
        int ret, tries = 0;
@@ -918,8 +943,29 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 
 char *mingw_getcwd(char *pointer, int len)
 {
-       wchar_t wpointer[MAX_PATH];
-       if (!_wgetcwd(wpointer, ARRAY_SIZE(wpointer)))
+       wchar_t cwd[MAX_PATH], wpointer[MAX_PATH];
+       DWORD ret = GetCurrentDirectoryW(ARRAY_SIZE(cwd), cwd);
+
+       if (!ret || ret >= ARRAY_SIZE(cwd)) {
+               errno = ret ? ENAMETOOLONG : err_win_to_posix(GetLastError());
+               return NULL;
+       }
+       ret = GetLongPathNameW(cwd, wpointer, ARRAY_SIZE(wpointer));
+       if (!ret && GetLastError() == ERROR_ACCESS_DENIED) {
+               HANDLE hnd = CreateFileW(cwd, 0,
+                       FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, NULL,
+                       OPEN_EXISTING, FILE_FLAG_BACKUP_SEMANTICS, NULL);
+               if (hnd == INVALID_HANDLE_VALUE)
+                       return NULL;
+               ret = GetFinalPathNameByHandleW(hnd, wpointer, ARRAY_SIZE(wpointer), 0);
+               CloseHandle(hnd);
+               if (!ret || ret >= ARRAY_SIZE(wpointer))
+                       return NULL;
+               if (xwcstoutf(pointer, normalize_ntpath(wpointer), len) < 0)
+                       return NULL;
+               return pointer;
+       }
+       if (!ret || ret >= ARRAY_SIZE(wpointer))
                return NULL;
        if (xwcstoutf(pointer, wpointer, len) < 0)
                return NULL;