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How can I suspend a whole command sequence in bash or zsh (or maybe some other shell)?

For example, if I run:

sleep 100; echo foo

and press Ctrl + Z, sleep is suspended and put into background, but echo then runs immediately.

I would like the latter not to happen, i.e. echo should run after sleep was resumed and completed.

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Execute them from subshell:

( sleep 100 ; echo foo ; )

And ctrl+z will freeze whole subshell, not just one command:

[1]+  Stopped                 ( sleep 100; echo foo ; )
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