Share via

_getcwd_dbg, _wgetcwd_dbg

Debug versions of the _getcwd, _wgetcwd functions (only available during debug).


char *_getcwd_dbg(
   char *buffer,
   int maxlen,
   int blockType,
   const char *filename,
   int linenumber
wchar_t *_wgetcwd_dbg(
   wchar_t *buffer,
   int maxlen,
   int blockType,
   const char *filename,
   int linenumber


Storage location for the path.

Maximum length of the path in characters: char for _getcwd_dbg and wchar_t for _wgetcwd_dbg.

Requested type of the memory block: _CLIENT_BLOCK or _NORMAL_BLOCK.

Pointer to the name of the source file that requested the allocation operation or NULL.

Line number in the source file where the allocation operation was requested or NULL.

Return value

Returns a pointer to buffer. A NULL return value indicates an error, and errno is set either to ENOMEM, indicating that there's insufficient memory to allocate maxlen bytes (when a NULL argument is given as buffer), or to ERANGE, indicating that the path is longer than maxlen characters.

For more information, see errno, _doserrno, _sys_errlist, and _sys_nerr.


The _getcwd_dbg and _wgetcwd_dbg functions are identical to _getcwd and _wgetcwd except that, when _DEBUG is defined, these functions use the debug version of malloc and _malloc_dbg to allocate memory if NULL is passed as the first parameter. For more information, see _malloc_dbg.

You don't need to call these functions explicitly in most cases. Instead, you can define the _CRTDBG_MAP_ALLOC flag. When _CRTDBG_MAP_ALLOC is defined, calls to _getcwd and _wgetcwd are remapped to _getcwd_dbg and _wgetcwd_dbg, respectively, with the blockType set to _NORMAL_BLOCK. Thus, you don't need to call these functions explicitly unless you want to mark the heap blocks as _CLIENT_BLOCK. For more information, see Types of blocks on the debug heap.

Generic-text routine mapping

Tchar.h routine _UNICODE and _MBCS not defined _MBCS defined _UNICODE defined
_tgetcwd_dbg _getcwd_dbg _getcwd_dbg _wgetcwd_dbg


Routine Required header
_getcwd_dbg <crtdbg.h>
_wgetcwd_dbg <crtdbg.h>

For more compatibility information, see Compatibility.

See also

_getcwd, _wgetcwd
Directory control
Debug versions of heap allocation functions