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#!/usr/bin/python
import argparse
import os
import sys
import time
def main():
parser = argparse.ArgumentParser()
parser.add_argument('mnt1')
parser.add_argument('mnt2')
parser.add_argument('fn')
args = parser.parse_args()
open(os.path.join(args.mnt1, args.fn), 'w')
f1 = open(os.path.join(args.mnt1, args.fn), 'r+')
f2 = open(os.path.join(args.mnt2, args.fn), 'r+')
f1.write('foo')
f1.flush()
a = f2.read(3)
print('got "%s"' % a)
assert a == 'foo'
f2.write('bar')
f2.flush()
a = f1.read(3)
print('got "%s"' % a)
assert a == 'bar'
## test short reads
f1.write('short')
f1.flush()
a = f2.read(100)
print('got "%s"' % a)
assert a == 'short'
f2.write('longer')
f2.flush()
a = f1.read(1000)
print('got "%s"' % a)
assert a == 'longer'
print('ok')
main()
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