[osol-help] how to check if a zpool is already imported and return exit code 0?

[Sherry Yu]

I need to have a command return exit code 0 if a zpool is already imported. 
Currently 
'zpool import <zpool_name>' would return exit code 1, error, if <zpool_name> is 
already imported. Any other way to bypass this issue? Thanks!
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