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由 Eric Blake 提交于
Reuse the tree listing of nodedev-list, coupled with the new helper function to efficiently grab snapshot parent names, to produce tree output for a snapshot hierarchy. For example: $ virsh snapshot-list dom --tree root1 | +- sibling1 +- sibling2 | | | +- grandchild | +- sibling3 root2 | +- child * tools/virsh.c (cmdSnapshotList): Add --tree. * tools/virsh.pod (snapshot-list): Document it.
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