(CommandList
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      ops: [Op_DAmp]
      children: [
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          name: _mtx
          body: 
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              children: [
                (Assignment
                  keyword: Assign_Local
                  pairs: [
                    (assign_pair lhs:(LhsName name:cur) op:Equal spids:[16])
                    (assign_pair lhs:(LhsName name:prev) op:Equal spids:[18])
                    (assign_pair lhs:(LhsName name:words) op:Equal spids:[20])
                    (assign_pair lhs:(LhsName name:cword) op:Equal spids:[22])
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                  spids: [14]
                )
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                  ops: [Op_DPipe]
                  children: [(C {(_init_completion)}) (ControlFlow token:<ControlFlow_Return return>)]
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                  pairs: [
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                    (assign_pair lhs:(LhsName name:tapes) op:Equal spids:[37])
                    (assign_pair lhs:(LhsName name:drives) op:Equal spids:[39])
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                )
                (Assignment
                  keyword: Assign_None
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                    (assign_pair
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                      op: Equal
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                        {
                          (DQ ('-f nobarcode invert noattach --version inquiry noattach ') 
                            ('        inventory status load unload eepos first last next')
                          )
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                                            arg_word: {(/dev/null)}
                                            spids: [58]
                                          )
                                        ]
                                      )
                                      (C {(awk)} 
                                        {(SQ <'/Storage Element [0-9]+:Full/ { printf "%s ", $3 }'>)}
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                                    negated: F
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                                            arg_word: {(/dev/null)}
                                            spids: [89]
                                          )
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                                      )
                                      (C {(awk)} 
                                        {
                                          (SQ 
                                            <
'/Data Transfer Element [0-9]+:(Full|Empty)/ { printf "%s ", $4 }'
                                            >
                                          )
                                        }
                                      )
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                                    negated: F
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                            left_token: <Left_CommandSub '$('>
                            spids: [84 101]
                          )
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                    )
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                (Assignment
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                    (assign_pair
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                          (BracedVarSub
                            token: <VSub_Name drives>
                            suffix_op: (PatSub pat:{(':Full')} do_all:T do_prefix:F do_suffix:F)
                            spids: [105 110]
                          )
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                      spids: [104]
                    )
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                  spids: [104]
                )
                (Assignment
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                    (assign_pair
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                      op: Equal
                      rhs: 
                        {
                          (BracedVarSub
                            token: <VSub_Name drives>
                            suffix_op: (PatSub pat:{(':Empty')} do_all:T do_prefix:F do_suffix:F)
                            spids: [114 119]
                          )
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                      spids: [113]
                    )
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                  spids: [113]
                )
                (If
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                                (BoolBinary
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                                  right: {(1)}
                                )
                            )
                          terminator: <Op_Semi ';'>
                        )
                      ]
                      action: [
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                          arms: [
                            (case_arm
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                              action: [
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                                    (assign_pair
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                                      op: Equal
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                                        {
                                          (ArrayLiteralPart
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                                              {
                                                (CommandSubPart
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                                                          {(DQ ($ VSub_Name '$tapes'))} {(--)} {(DQ ($ VSub_Name '$cur'))}
                                                        )
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                                                    )
                                                  left_token: <Left_CommandSub '$('>
                                                  spids: [153 169]
                                                )
                                              }
                                            ]
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                                      spids: [150]
                                    )
                                  ]
                                  spids: [150]
                                )
                              ]
                              spids: [146 147 174 16777215]
                            )
                            (case_arm
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                                (Assignment
                                  keyword: Assign_None
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                                    (assign_pair
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                                      op: Equal
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                                        {
                                          (ArrayLiteralPart
                                            words: [
                                              {
                                                (CommandSubPart
                                                  command_list: 
                                                    (CommandList
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                                                        (C {(compgen)} {(-W)} 
                                                          {(DQ ($ VSub_Name '$drives'))} {(--)} {(DQ ($ VSub_Name '$cur'))}
                                                        )
                                                      ]
                                                    )
                                                  left_token: <Left_CommandSub '$('>
                                                  spids: [190 206]
                                                )
                                              }
                                            ]
                                          )
                                        }
                                      spids: [187]
                                    )
                                  ]
                                  spids: [187]
                                )
                              ]
                              spids: [177 184 211 16777215]
                            )
                            (case_arm
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                              action: [(C {(true)})]
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                            )
                            (case_arm
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                              spids: [224 225 231 16777215]
                            )
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                          spids: [139 143 234]
                        )
                      ]
                      spids: [16777215 136]
                    )
                  ]
                  else_action: [
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                          op: Equal
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                            {
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                                  {
                                    (CommandSubPart
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                                              {(DQ ($ VSub_Name '$cur'))}
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                                      left_token: <Left_CommandSub '$('>
                                      spids: [243 259]
                                    )
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                          spids: [240]
                        )
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                    )
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                  spids: [237 264]
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})
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              spids: [11]
            )
          spids: [7 10]
        )
        (C {(complete)} {(-F)} {(_mtx)} {(mtx)})
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    )
  ]
)