php man page for yp_errno

YP_ERRNO(3)								 1							       YP_ERRNO(3)

yp_errno - Returns the error code of the previous operation

SYNOPSIS
       int yp_errno (void  )

DESCRIPTION
	Returns the error code of the previous operation.

RETURN VALUES
	Returns one of the YPERR_XXX error constants.

SEE ALSO
       yp_err_string(3).

PHP Documentation Group 													       YP_ERRNO(3)