+++ /dev/null
-"""
-TODO: This is BETA. When it gets stable I will move it into the pexpect.py file.
-"""
-
-from pexpect import *
-import os
-
-__all__ = ['fdspawn']
-
-class fdspawn (spawn):
- """This is like pexpect.spawn but allows you to supply your own,
- already open file descriptor. For example, you could use it to
- read through a file looking for patterns, or to control a modem or
- serial device.
- """
- def __init__ (self, fd, args=[], timeout=30, maxread=2000, searchwindowsize=None, logfile=None):
- """This takes a file descriptor (an int) or an object that support the fileno() method
- (returning an int). All Python file-like objects support fileno().
- """
- ### TODO: Add better handling of trying to use fdspawn in place of spawn
- ### TODO: (overload to allow fdspawn to also handle commands as spawn does.
-
- if type(fd) != type(0) and hasattr(fd, 'fileno'):
- fd = fd.fileno()
-
- if type(fd) != type(0):
- raise ExceptionPexpect ('The fd argument is not an int. If this is a command string then maybe you want to use pexpect.spawn.')
-
- try: # make sure fd is a valid file descriptor
- os.fstat(fd)
- except OSError:
- raise ExceptionPexpect, 'The fd argument is not a valid file descriptor.'
-
- self.args = None
- self.command = None
- spawn.__init__(self, None, args, timeout, maxread, searchwindowsize, logfile)
- self.child_fd = fd
- self.own_fd = False
- self.closed = False
- self.name = '<file descriptor %d>' % fd
-
- def __del__ (self):
- return
-
- def close (self):
- if super(fdspawn, self).child_fd == -1:
- return
- if self.own_fd:
- super(fdspawn, self).close (self)
- else:
- self.flush()
- os.close(super(fdspawn, self).child_fd)
- self.child_fd = -1
- self.closed = True
-
- def isalive (self):
- """This checks if the file descriptor is still valid.
- If os.fstat() does not raise an exception then we assume it is alive.
- """
- if self.child_fd == -1:
- return False
- try:
- os.fstat(self.child_fd)
- return True
- except:
- return False
-
- def terminate (self, force=False):
- raise ExceptionPexpect ('This method is not valid for file descriptors.')
-
- def kill (self, sig):
- return
-