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60 lines
1.5 KiB
60 lines
1.5 KiB
#!/usr/bin/env python3
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import array
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import fcntl
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import os
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import termios
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import sys
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import tempfile
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from posix_parity import compare_calls
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from posix_parity import fail
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from posix_parity import join
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from posix_parity import touch
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def fionread(fd):
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buf = array.array("i", [0])
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fcntl.ioctl(fd, termios.FIONREAD, buf, True)
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return buf[0]
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def main():
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if len(sys.argv) != 2:
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print("usage: TEST_posix_ioctl <mountpoint>", file=sys.stderr)
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return 1
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mount = sys.argv[1]
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with tempfile.TemporaryDirectory() as native:
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merge_file = join(mount, "posix-ioctl/file")
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native_file = join(native, "posix-ioctl/file")
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touch(merge_file, b"hello-world")
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touch(native_file, b"hello-world")
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mfd = os.open(merge_file, os.O_RDONLY)
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nfd = os.open(native_file, os.O_RDONLY)
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try:
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err = compare_calls("ioctl FIONREAD", lambda: fionread(mfd), lambda: fionread(nfd), lambda a, b: a == b)
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if err:
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return fail(err)
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os.lseek(mfd, 5, os.SEEK_SET)
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os.lseek(nfd, 5, os.SEEK_SET)
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err = compare_calls(
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"ioctl FIONREAD after seek",
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lambda: fionread(mfd),
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lambda: fionread(nfd),
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lambda a, b: a == b,
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)
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if err:
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return fail(err)
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finally:
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os.close(mfd)
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os.close(nfd)
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return 0
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if __name__ == "__main__":
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raise SystemExit(main())
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