plan9fox/sys/lib/python/factotum.py

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'''factotum for py'''
import subprocess
class FactotumError(Exception):
pass
class PhaseError(Exception):
pass
class NeedkeyError(Exception):
pass
class Factotum:
def start(self, **args):
self.f = open('/mnt/factotum/rpc', 'r+', 0)
msg = 'start'
for k, v in args.iteritems():
msg += ' ' + k + '=\'' + v + '\''
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while True:
self.f.write(msg)
ret = self.f.read(4096)
if ret[:7] != "needkey": break
self.needkey(ret[8:])
if ret == "ok": return
if ret[:5] == "error": raise FactotumError(ret[6:])
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raise FactotumError("start: unexpected " + ret)
def needkey(self, string):
subprocess.call(['/bin/auth/factotum', '-g', string])
def read(self):
while True:
self.f.write('read')
ret = self.f.read(4096)
if ret[:7] != "needkey": break
self.needkey(ret[8:])
if ret == "ok": return ""
if ret[:3] == "ok ": return ret[3:]
if ret[:5] == "error": raise FactotumError(ret[6:])
if ret[:5] == "phase": raise PhaseError(ret[6:])
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raise FactotumError("read: unexpected " + ret)
def write(self, data):
while True:
self.f.write('write ' + data)
ret = self.f.read(4096)
if ret[:7] != "needkey": break
self.needkey(ret[8:])
if ret == "ok": return 0
if ret[:3] == "toosmall ": return int(ret[4:])
if ret[:5] == "error": raise FactotumError(ret[6:])
if ret[:5] == "phase": raise PhaseError(ret[6:])
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raise FactotumError("write: unexpected " + ret)
def attr(self):
self.f.write('attr')
ret = self.f.read(4096)
if ret[:5] == "error": raise FactotumError(ret[6:])
if ret[:3] == "ok ":
dict = {}
ret = ret[3:]
mode = 0
key = ""
value = ""
while ret != "":
if mode == 0:
if ret[0] == '=':
if ret[1] == '\'':
mode = 2
ret = ret[1:]
else:
mode = 1
else:
key += ret[0]
elif mode == 1:
if ret[0] == ' ':
dict[key] = value
key = ""
value = ""
mode = 0
else:
value += ret[0]
elif mode == 2:
if ret[0] == '\'':
ret = ret[1:]
dict[key] = value
key = ""
value = ""
mode = 0
else:
value += ret[0]
if ret != "": ret = ret[1:]
if key != "":
dict[key] = value
return dict
raise FactotumError("unexpected " + ret)
def close(self):
self.f.close()
def delkey(self, **args):
f = open('/mnt/factotum/ctl', 'w', 0)
msg = 'delkey'
for k, v in args.iteritems():
msg += ' ' + k + '=\'' + v + '\''
f.write(msg)
f.close()