(command.CommandList
  children: [
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'bblen='> name:bblen)
          op: assign_op.Equal
          rhs: {<7680>}
          spids: [79]
        )
      ]
      redirects: []
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'rdlen='> name:rdlen)
          op: assign_op.Equal
          rhs: {<256>}
          spids: [82]
        )
      ]
      redirects: []
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'totlen='> name:totlen)
          op: assign_op.Equal
          rhs: {<7680>}
          spids: [85]
        )
      ]
      redirects: []
    )
    (command.WhileUntil
      keyword: <Id.KW_While while>
      cond: 
        (condition.Shell
          commands: [
            (command.Sentence
              child: 
                (C {<getopts>} {<b> <Id.Lit_Colon ':'> <r> <Id.Lit_Colon ':'> <e> <Id.Lit_Colon ':'>} 
                  {<a>}
                )
              terminator: <Id.Op_Semi _>
            )
          ]
        )
      body: 
        (command.DoGroup
          children: [
            (command.Case
              to_match: {($ Id.VSub_DollarName a)}
              arms: [
                (case_arm
                  pat_list: [{<b>}]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'bblen='> name:bblen)
                          op: assign_op.Equal
                          rhs: {($ Id.VSub_DollarName OPTARG)}
                          spids: [116]
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [113 114 118 -1]
                )
                (case_arm
                  pat_list: [{<r>}]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'rdlen='> name:rdlen)
                          op: assign_op.Equal
                          rhs: {($ Id.VSub_DollarName OPTARG)}
                          spids: [124]
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [121 122 126 -1]
                )
                (case_arm
                  pat_list: [{<e>}]
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extra='> name:extra)
                          op: assign_op.Equal
                          rhs: {($ Id.VSub_DollarName OPTARG)}
                          spids: [132]
                        )
                      ]
                      redirects: []
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'totlen='> name:totlen)
                          op: assign_op.Equal
                          rhs: {<15872>}
                          spids: [136]
                        )
                      ]
                      redirects: []
                    )
                  ]
                  spids: [129 130 138 -1]
                )
                (case_arm
                  pat_list: [{<Id.Lit_QMark '?'>}]
                  action: [
                    (C {<printf>} 
                      {
                        (DQ 
                          <
'Usage: %s: [ -b bb_len ] [ -r rd_len ] boot_fcode ramdisk_fcode bootblk'
                          > <Id.Lit_BadBackslash '\\'> <n>
                        )
                      } {($ Id.VSub_Number 0)}
                    )
                    (command.ControlFlow
                      token: <Id.ControlFlow_Exit exit>
                      arg_word: {<-1>}
                    )
                  ]
                  spids: [141 142 158 -1]
                )
              ]
              redirects: []
            )
          ]
        )
      redirects: []
    )
    (C {<shift>} 
      {
        (word_part.ArithSub
          anode: 
            (arith_expr.Binary
              op_id: Id.Arith_Minus
              left: {($ Id.VSub_DollarName OPTIND)}
              right: {<Id.Lit_Digits 1>}
            )
        )
      }
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'rdoff='> name:rdoff)
          op: assign_op.Equal
          rhs: 
            {
              (word_part.ArithSub
                anode: 
                  (arith_expr.Binary
                    op_id: Id.Arith_Minus
                    left: {($ Id.VSub_DollarName bblen)}
                    right: {($ Id.VSub_DollarName rdlen)}
                  )
              )
            }
          spids: [186]
        )
      ]
      redirects: []
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'bbsize='> name:bbsize)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_DollarParen '$('>
                child: 
                  (command.Pipeline
                    children: [
                      (C {<ls>} {<-l>} {($ Id.VSub_Number 1)})
                      (C {<awk>} {<-e>} {(SQ <'{ print $5 }'>)})
                    ]
                    negated: F
                    stderr_indices: []
                  )
                right: <Id.Eof_RParen _>
              )
            }
          spids: [197]
        )
      ]
      redirects: []
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName bbsize)} {<-gt>} 
                      {($ Id.VSub_DollarName rdoff)} {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (C {<printf>} 
              {
                (DQ ($ Id.VSub_Number 1) <' must be smaller than '> ($ Id.VSub_DollarName rdoff) 
                  <Id.Lit_BadBackslash '\\'> <n>
                )
              }
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<-1>})
          ]
          spids: [216 229]
        )
      ]
      else_action: []
      redirects: []
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'rdsize='> name:rdsize)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_DollarParen '$('>
                child: 
                  (command.Pipeline
                    children: [
                      (C {<ls>} {<-l>} {($ Id.VSub_Number 2)})
                      (C {<awk>} {<-e>} {(SQ <'{ print $5 }'>)})
                    ]
                    negated: F
                    stderr_indices: []
                  )
                right: <Id.Eof_RParen _>
              )
            }
          spids: [250]
        )
      ]
      redirects: []
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName rdsize)} {<-gt>} 
                      {($ Id.VSub_DollarName rdlen)} {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (C {<printf>} 
              {
                (DQ ($ Id.VSub_Number 1) <' must be smaller than '> ($ Id.VSub_DollarName rdlen) 
                  <Id.Lit_BadBackslash '\\'> <n>
                )
              }
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<-1>})
          ]
          spids: [269 282]
        )
      ]
      else_action: []
      redirects: []
    )
    (C {<mkfile>} {<-n>} {($ Id.VSub_DollarName totlen)} {($ Id.VSub_Number 3)})
    (C {<chmod>} {<644>} {($ Id.VSub_Number 3)})
    (C {<dd>} {<Id.Lit_VarLike 'if='> ($ Id.VSub_Number 1)} 
      {<Id.Lit_VarLike 'of='> ($ Id.VSub_Number 3)} {<Id.Lit_VarLike 'conv='> <notrunc>} {<Id.Lit_VarLike 'bs='> <1>}
    )
    (C {<dd>} {<Id.Lit_VarLike 'if='> ($ Id.VSub_Number 2)} 
      {<Id.Lit_VarLike 'of='> ($ Id.VSub_Number 3)} {<Id.Lit_VarLike 'conv='> <notrunc>} {<Id.Lit_VarLike 'bs='> <1>} 
      {<Id.Lit_VarLike 'oseek='> ($ Id.VSub_DollarName rdoff)}
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName totlen)} {<-gt>} 
                      {($ Id.VSub_DollarName bblen)} {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name left:<Id.Lit_VarLike 'extsize='> name:extsize)
                  op: assign_op.Equal
                  rhs: 
                    {
                      (command_sub
                        left_token: <Id.Left_DollarParen '$('>
                        child: 
                          (command.Pipeline
                            children: [
                              (C {<ls>} {<-l>} {($ Id.VSub_DollarName extra)})
                              (C {<awk>} {<-e>} {(SQ <'{ print $5 }'>)})
                            ]
                            negated: F
                            stderr_indices: []
                          )
                        right: <Id.Eof_RParen _>
                      )
                    }
                  spids: [383]
                )
              ]
              redirects: []
            )
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName extsize)} {<-gt>} {<16384>} 
                              {<Id.Lit_RBracket ']'>}
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (C {<printf>} 
                      {
                        (DQ ($ Id.VSub_Number 1) <' must be smaller than 16k'> 
                          <Id.Lit_BadBackslash '\\'> <n>
                        )
                      }
                    )
                    (command.ControlFlow
                      token: <Id.ControlFlow_Exit exit>
                      arg_word: {<-1>}
                    )
                  ]
                  spids: [403 416]
                )
              ]
              else_action: []
              redirects: []
            )
            (C {<dd>} {<Id.Lit_VarLike 'if='> ($ Id.VSub_DollarName extra)} 
              {<Id.Lit_VarLike 'of='> ($ Id.VSub_Number 3)} {<Id.Lit_VarLike 'conv='> <notrunc>} {<Id.Lit_VarLike 'bs='> <1>} 
              {<Id.Lit_VarLike 'oseek='> ($ Id.VSub_DollarName bblen)}
            )
          ]
          spids: [367 380]
        )
      ]
      else_action: []
      redirects: []
    )
    (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<0>})
  ]
)