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loop.4: Document LOOP_CHANGE_FD
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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@ -136,6 +136,14 @@ The (third)
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argument must be a pointer to a
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.IR "struct loop_info" .
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.TP
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.BR LOOP_CHANGE_FD " (since Linux 2.6.5)"
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Switch the backing store of the loop device to the new file identified
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file descriptor specified in the (third)
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.BR ioctl (2)
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argument, which is an integer.
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This operation is possible only if the loop device is read-only and
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the new backing store is the same size and type as the old backing store.
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.TP
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.BR LOOP_SET_CAPACITY " (since Linux 2.6.30)"
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.\" commit 53d6660836f233df66490707365ab177e5fb2bb4
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Resize a live loop device.
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