[feature] how about keep bookmarking the latest snapshot as `zfsname#latest`? about zfsnap HOT 5 OPEN

Ok, that's a cool idea. I've wanted to extend zfsnap to make and keep bookmarks automatically (I've been bit once by one pool no longer having a shared snapshot with it's backup pool. :-/)

I havn't played with bookmarks yet. What kind of info can we get about them? (for example, does zsf get all pool#latest work?) It'd be nice to have an easy way to determine if a given bookmark exists at the destination.

---Alex

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Command

zfs get all pool#latest
cannot open 'pool#latest': invalid dataset name

fails on my side with zfsonlinux 0.6.5.8. I've not played with bookmarks much too, and now the easiest way I found to detect a bookmark is a hack ...

latest_found=$(zfs list -H -t bookmark | awk '$1 ~ /pool#latest/{print $1}' | wc -l)
# 0 for not found, =1 for found

This way works for snapshot detection but not for bookmarks...

zfs destroy -n pool/dataset@snap

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the # without quotes is interpreted as beginning of comment

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I don't know about zfs bookmarks, but perhaps you can consider using % instead.
Edit.

Hmm. I was wrong.... on some shells it's not interpreted in any way if there is no space before #

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@graudeejs I can use # without escape character in fish shell.
In bash it should be escaped i.e. \#.

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