62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
from __future__ import absolute_import
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from telnetlib import Telnet
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class IloDebugger(object):
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DEBUG_PORT = 8
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def __init__(self, hostname, timeout=10):
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"""Initialize an iLO debugger instance.
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:param hostname: hostname of the iLO server
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:param timeout: connection timeout, in seconds
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"""
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self.hostname = hostname
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self.timeout = timeout
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self.tn = None
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self.prompt = '\r\n>'
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def open(self):
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"""Connect to the iLO debugger."""
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self.tn = Telnet(self.hostname, self.DEBUG_PORT, self.timeout)
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# wait until the debugger is ready and clear initial output
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self.read_until(self.prompt)
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def close(self):
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"""Close the connection."""
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if self.tn:
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self.tn.close()
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self.tn = None
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def __enter__(self):
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self.open()
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return self
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def __exit__(self, exc_type, exc_value, traceback):
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self.close()
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def read(self):
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"""Read all available output without blocking I/O."""
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output = self.tn.read_very_eager()
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# debugger occasionally outputs CRLFs with double CRs - just convert all to LFs
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output = output.replace('\r', '')
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return output
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def read_until(self, expected, timeout=10):
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"""Read until an expected string is encountered or the timeout, in seconds, has been reached."""
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output = self.tn.read_until(expected, timeout)
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output = output.replace('\r', '')
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return output
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def writeline(self, line):
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"""Write a line to the iLO debugger."""
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self.tn.write(line + '\n')
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def run(self, cmd_line):
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"""Run an iLO debugger command and capture output."""
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self.read() # clear any previous output
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self.writeline(cmd_line)
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output = self.read_until(self.prompt)
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return output
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