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52 lines
1.5 KiB
52 lines
1.5 KiB
#!/bin/sh
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# uvol prototype
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# future development roadmap (aka. to-do):
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# * re-implement in C (use libubox, execve lvm/ubi*)
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# * hash to validate volume while writing
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# * add atomic batch processing for use by container/package manager
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if [ -z "$1" ]; then cat <<EOF
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uvol storage volume manager
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syntax: uvol command ...
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commands:
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boot get active volumes ready (called on boot)
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free show number of bytes available
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total show total number of bytes
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align show sector size in bytes
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list [volname] list volumes
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create volname size type create new volume
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size: in bytes
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type: 'ro' or 'rw'
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remove volname delete volume
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device volname show block device for mounting
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size volname show size of volume
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up volname get volume ready for mounting
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down volname take volume down after unmounting
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status volname return status of volume
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return code: 0 - volume is ready for use
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1 - volume is not ready for use
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2 - volume doesn'y exist
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write volname size write to volume from stdin, size in bytes
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EOF
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return 22
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fi
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uvol_backend=
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backends_tried=
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for backend in /usr/libexec/uvol/*.sh; do
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total=$($backend total)
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backends_tried="$backends_tried $($backend name)"
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[ "$total" ] && uvol_backend=$backend
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done
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if [ -z "$uvol_backend" ]; then
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echo "No backend available. (tried:$backends_tried)"
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echo "To setup devices with block storage install 'autopart'."
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return 2
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fi
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flock -x /tmp/run/uvol.lock "$uvol_backend" "$@"
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