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loop.4: Document LOOP_CHANGE_FD 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
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Michael Kerrisk 2015-05-01 23:11:14 +02:00
parent 5210b7965f
commit 14ae756aa4
1 changed files with 8 additions and 0 deletions
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man4/loop.4
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@ -136,6 +136,14 @@ The (third)
argument must be a pointer to a
.IR "struct loop_info" .
.TP
.BR LOOP_CHANGE_FD " (since Linux 2.6.5)"
Switch the backing store of the loop device to the new file identified
file descriptor specified in the (third)
.BR ioctl (2)
argument, which is an integer.
This operation is possible only if the loop device is read-only and
the new backing store is the same size and type as the old backing store.
.TP
.BR LOOP_SET_CAPACITY " (since Linux 2.6.30)"
.\" commit 53d6660836f233df66490707365ab177e5fb2bb4
Resize a live loop device.