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19 lines
375 B
Python
19 lines
375 B
Python
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#!/usr/bin/env python3
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import os
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import sys
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filename = sys.argv[1]
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data = bytes('a', 'utf-8')
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fd = os.open(filename, os.O_CREAT | os.O_TRUNC | os.O_WRONLY)
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try:
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os.pwrite(fd, data, 1024)
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os.pwrite(fd, data, 16 * 1024 * 1024)
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os.pwrite(fd, data, 18 * 1024 * 1024)
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finally:
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os.close(fd)
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stat = os.lstat(filename)
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assert stat.st_size == 18 * 1024 * 1024 + 1
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