Operating System Utilities  int Py_FdIsInteractive(FILE *fp,
const char *filename) Return true (nonzero) if the standard I/O
file fp with name filename is deemed interactive. This is the
case for files for which isatty(fileno(fp)) is true. If the
global flag Py_InteractiveFlag is true, this function also
returns true if the filename pointer is NULL or if the name is
equal to one of the strings '<stdin>' or '???'. long
PyOS_GetLastModificationTime(char *filename) Return the time of
last modification of the file filename. The result is encoded in
the same way as the timestamp returned by the standard C library
function time(). void PyOS_AfterFork() Function to update some
internal state after a process fork; this should be called in
the new process if the Python interpreter will continue to be
used. If a new executable is loaded into the new process, this
function does not need to be called. int PyOS_CheckStack()
Return true when the interpreter runs out of stack space. This
is a reliable check, but is only ava