Difficulty with a shell function.

[peter]

# blkid --uuid 2026-01-19-03-28-45-00
/dev/sdc
Meaning that the block device with that UUID is connected to the system.

When this executes,

    destination="2026-01-19-03-28-45-00";
    printf "destination=$destination\n";
    if ! ( lsblk -alno UUID | grep $destination > /dev/null ); then
      printf "destination device not connected.  Aborting.\n"
    else
      printf "destination device is connected.\n"
      dev="$( blkid --uuid $destination )";
      printf "dev=$dev\n";
      # FTH;
    fi;
    
this is the output.
destination=2026-01-19-03-28-45-00
destination device not connected.  Aborting.

With the device being present, I expect this.
destination=2026-01-19-03-28-45-00
destination device is connected.
dev=/dev/sdc

Does this line have a syntax error?
    if ! ( lsblk -alno UUID | grep $destination > /dev/null ); then

Thanks,                  ... P.

-- 
mobile:  +1 778 951 5147
VoIP:    +1 778 508 0020
Bcc: peter at e a s t h o p e dot c a
projects: en.wikibooks.org/wiki/User:PeterEasthope