extern "C" void cygwin_posix_to_win32_path_list const char *posix char *win32 Given a POSIX path-style string (i.e. /foo:/bar) convert it to the equivalent Win32 path-style string (i.e. d:\;e:\bar). win32 must point to a sufficiently large buffer. char *_epath; char *_win32epath; _epath = _win32epath = getenv (NAME); /* If we have a POSIX path list, convert to win32 path list */ if (_epath != NULL && *_epath != 0 && cygwin_posix_path_list_p (_epath)) { _win32epath = (char *) xmalloc (cygwin_posix_to_win32_path_list_buf_size (_epath)); cygwin_posix_to_win32_path_list (_epath, _win32epath); } See also cygwin_posix_to_win32_path_list_buf_size extern "C" void cygwin_win32_to_posix_path_list const char *win32 char *posix Given a Win32 path-style string (i.e. d:\;e:\bar) convert it to the equivalent POSIX path-style string (i.e. /foo:/bar). posix must point to a sufficiently large buffer. See also cygwin_win32_to_posix_path_list_buf_size extern "C" int cygwin_posix_to_win32_path_list_buf_size const char *path_list Returns the number of bytes needed to hold the result of calling cygwin_posix_to_win32_path_list. extern "C" int cygwin_win32_to_posix_path_list_buf_size const char *path_list Tells you how many bytes are needed for the results of cygwin_win32_to_posix_path_list. extern "C" void cygwin_conv_to_posix_path const char *path char *posix_path Converts a Win32 path to a POSIX path. If path is already a POSIX path, leaves it alone. If path is relative, then posix_path will also be relative. Note that posix_path must point to a buffer of sufficient size; use MAX_PATH if needed. extern "C" void cygwin_conv_to_win32_path const char *path char *win32_path Converts a POSIX path to a Win32 path. If path is already a Win32 path, leaves it alone. If path is relative, then win32_path will also be relative. Note that win32_path must point to a buffer of sufficient size; use MAX_PATH if needed. extern "C" void cygwin_conv_to_full_posix_path const char *path char *posix_path Converts a Win32 path to a POSIX path. If path is already a POSIX path, leaves it alone. If path is relative, then posix_path will be converted to an absolute path. Note that posix_path must point to a buffer of sufficient size; use MAX_PATH if needed. extern "C" void cygwin_conv_to_full_win32_path const char *path char *win32_path Converts a POSIX path to a Win32 path. If path is already a Win32 path, leaves it alone. If path is relative, then win32_path will be converted to an absolute path. Note that win32_path must point to a buffer of sufficient size; use MAX_PATH if needed. extern "C" int posix_path_list_p const char *path This function tells you if the supplied path is a POSIX-style path (i.e. posix names, forward slashes, colon delimiters) or a Win32-style path (drive letters, reverse slashes, semicolon delimiters. The return value is true if the path is a POSIX path. Note that "_p" means "predicate", a lisp term meaning that the function tells you something about the parameter. extern "C" void cygwin_split_path const char * path char * dir char * file Split a path into the directory and the file portions. Both dir and file are expected to point to buffers of sufficient size. char dir[200], file[100]; cygwin_split_path("c:/foo/bar.c", dir, file); printf("dir=%s, file=%s\n", dir, file);