.. include:: ../global.rst

Predicates
^^^^^^^^^^


.. _`b?`:

.. idio:function:: b? pathname


   is `pathname` a block special device?	
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`c?`:

.. idio:function:: c? pathname


   is `pathname` a character special device?	
   						
   :param pathname: pathname to stat		
   :type pathname: string				
   :return: ``#t`` or ``#f``			
   :rtype: boolean					
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`d?`:

.. idio:function:: d? pathname


   is `pathname` a directory?		
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`e?`:

.. idio:function:: e? pathname


   does `pathname` exist?			
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`f?`:

.. idio:function:: f? pathname


   is `pathname` a regular file?		
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`l?`:

.. idio:function:: l? pathname


   is `pathname` a symlink?		
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`p?`:

.. idio:function:: p? pathname


   is `pathname` a FIFO?			
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`r?`:

.. idio:function:: r? pathname


   does `pathname` pass :samp:`access ({pathname}, R_OK)`?	
   						
   :param pathname: file to test			
   :type pathname: string				
   :return: ``#t`` or ``#f``			
   :rtype: boolean					
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`s?`:

.. idio:function:: s? pathname


   is `pathname` a socket?			
   					
   :param pathname: pathname to stat	
   :type pathname: string			
   :return: ``#t`` or ``#f``		
   :rtype: boolean				
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`T?`:

.. idio:function:: T? fd


   is `fd` a terminal?			
   					
   :param fd: file descriptor to stat	
   :type fd: C/int				
   :return: ``#t`` or ``#f``		
   :rtype: boolean				


.. _`w?`:

.. idio:function:: w? pathname


   does `pathname` pass :samp:`access ({pathname}, W_OK)`?	
   						
   :param pathname: file to test			
   :type pathname: string				
   :return: ``#t`` or ``#f``			
   :rtype: boolean					
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	


.. _`x?`:

.. idio:function:: x? pathname


   does `pathname` pass :samp:`access ({pathname}, X_OK)`?	
   						
   :param pathname: file to test			
   :type pathname: string				
   :return: ``#t`` or ``#f``			
   :rtype: boolean					
   :raises ^rt-libc-format-error: if `pathname` contains an ASCII NUL	




.. include:: ../commit.rst