115 lines
3.5 KiB
Python
115 lines
3.5 KiB
Python
import pty, os, sys, signal
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from test.test_support import verbose, TestFailed, TestSkipped
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TEST_STRING_1 = "I wish to buy a fish license.\n"
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TEST_STRING_2 = "For my pet fish, Eric.\n"
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if verbose:
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def debug(msg):
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print msg
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else:
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def debug(msg):
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pass
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# Marginal testing of pty suite. Cannot do extensive 'do or fail' testing
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# because pty code is not too portable.
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def test_basic_pty():
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try:
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debug("Calling master_open()")
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master_fd, slave_name = pty.master_open()
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debug("Got master_fd '%d', slave_name '%s'"%(master_fd, slave_name))
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debug("Calling slave_open(%r)"%(slave_name,))
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slave_fd = pty.slave_open(slave_name)
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debug("Got slave_fd '%d'"%slave_fd)
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except OSError:
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# " An optional feature could not be imported " ... ?
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raise TestSkipped, "Pseudo-terminals (seemingly) not functional."
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if not os.isatty(slave_fd):
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raise TestFailed, "slave_fd is not a tty"
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# IRIX apparently turns \n into \r\n. Allow that, but avoid allowing other
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# differences (like extra whitespace, trailing garbage, etc.)
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debug("Writing to slave_fd")
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os.write(slave_fd, TEST_STRING_1)
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s1 = os.read(master_fd, 1024)
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sys.stdout.write(s1.replace("\r\n", "\n"))
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debug("Writing chunked output")
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os.write(slave_fd, TEST_STRING_2[:5])
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os.write(slave_fd, TEST_STRING_2[5:])
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s2 = os.read(master_fd, 1024)
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sys.stdout.write(s2.replace("\r\n", "\n"))
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os.close(slave_fd)
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os.close(master_fd)
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def handle_sig(sig, frame):
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raise TestFailed, "isatty hung"
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# isatty() and close() can hang on some platforms
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# set an alarm before running the test to make sure we don't hang forever
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old_alarm = signal.signal(signal.SIGALRM, handle_sig)
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signal.alarm(10)
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try:
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test_basic_pty()
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finally:
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# remove alarm, restore old alarm handler
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signal.alarm(0)
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signal.signal(signal.SIGALRM, old_alarm)
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# basic pty passed.
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debug("calling pty.fork()")
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pid, master_fd = pty.fork()
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if pid == pty.CHILD:
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# stdout should be connected to a tty.
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if not os.isatty(1):
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debug("Child's fd 1 is not a tty?!")
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os._exit(3)
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# After pty.fork(), the child should already be a session leader.
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# (on those systems that have that concept.)
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debug("In child, calling os.setsid()")
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try:
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os.setsid()
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except OSError:
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# Good, we already were session leader
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debug("Good: OSError was raised.")
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pass
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except AttributeError:
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# Have pty, but not setsid() ?
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debug("No setsid() available ?")
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pass
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except:
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# We don't want this error to propagate, escaping the call to
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# os._exit() and causing very peculiar behavior in the calling
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# regrtest.py !
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# Note: could add traceback printing here.
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debug("An unexpected error was raised.")
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os._exit(1)
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else:
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debug("os.setsid() succeeded! (bad!)")
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os._exit(2)
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os._exit(4)
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else:
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debug("Waiting for child (%d) to finish."%pid)
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(pid, status) = os.waitpid(pid, 0)
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res = status >> 8
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debug("Child (%d) exited with status %d (%d)."%(pid, res, status))
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if res == 1:
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raise TestFailed, "Child raised an unexpected exception in os.setsid()"
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elif res == 2:
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raise TestFailed, "pty.fork() failed to make child a session leader."
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elif res == 3:
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raise TestFailed, "Child spawned by pty.fork() did not have a tty as stdout"
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elif res != 4:
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raise TestFailed, "pty.fork() failed for unknown reasons."
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os.close(master_fd)
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# pty.fork() passed.
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