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63 lines
1.5 KiB
Python
63 lines
1.5 KiB
Python
#!/usr/bin/env python
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import optparse
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import os
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import shlex
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import subprocess
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import sys
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HOST_KEY_ASK_MSG = """
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The authenticity of host '[91.121.165.123]:9122 ([91.121.165.123]:9122)' can't be established.
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ECDSA key fingerprint is SHA256:JvfPvazZzQ9/CUdKN7tiYlNZtDRdEgDsYVIzOgPrsR4.
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Are you sure you want to continue connecting (yes/no)?
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""".strip('\n')
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HOST_KEY_STRICT_MSG = """Host key verification failed.\n"""
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def tty(msg):
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fp = open('/dev/tty', 'w', 0)
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fp.write(msg)
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fp.close()
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def stderr(msg):
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fp = open('/dev/stderr', 'w', 0)
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fp.write(msg)
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fp.close()
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def confirm(msg):
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tty(msg)
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fp = open('/dev/tty', 'r', 0)
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try:
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return fp.readline()
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finally:
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fp.close()
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if os.getenv('FAKESSH_MODE') == 'ask':
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assert 'y\n' == confirm(HOST_KEY_ASK_MSG)
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if os.getenv('FAKESSH_MODE') == 'strict':
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stderr(HOST_KEY_STRICT_MSG)
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sys.exit(255)
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parser = optparse.OptionParser()
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parser.add_option('--user', '-l', action='store')
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parser.add_option('-o', dest='options', action='append')
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parser.disable_interspersed_args()
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opts, args = parser.parse_args(sys.argv[1:])
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args.pop(0) # hostname
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# On Linux the TTY layer appears to begin tearing down a PTY after the last FD
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# for it is closed, causing SIGHUP to be sent to its foreground group. Since
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# the bootstrap overwrites the last such fd (stderr), we can't just exec it
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# directly, we must hold it open just like real SSH would. So use
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# subprocess.call() rather than os.execve() here.
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args = [''.join(shlex.split(s)) for s in args]
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sys.exit(subprocess.call(args))
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