Returns pathname variables.
#include <unistd.h> long pathconf ( cons char *path, int name);
(IN) Points to a pathname of the file or directory.
(IN) Specifies a variable to be queried relative to the path parameter. For a list of supported variable, see Path Configuration Variables.
If successful, returns the value of the variable specified by the name parameter. Otherwise, returns -1 and sets errno to one of the following:
The pathconf function can return -1 without setting a value in errno if the value of any of the name flags is unspecified.