(command.CommandList
  children: [
    (C {<set>} {<-u> ($ Id.VSub_DollarName '$DX')})
    (command.Case
      to_match: {($ Id.VSub_Pound '$#')}
      arms: [
        (case_arm
          pat_list: [{<2>}]
          action: [
            (command.Sentence
              child: 
                (command.ShAssignment
                  pairs: [
                    (assign_pair
                      lhs: (sh_lhs_expr.Name name:OLDTAB)
                      op: assign_op.Equal
                      rhs: {($ Id.VSub_Number '$1')}
                      spids: [115]
                    )
                  ]
                )
              terminator: <Id.Op_Semi _>
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:NEWTAB)
                  op: assign_op.Equal
                  rhs: {($ Id.VSub_Number '$2')}
                  spids: [120]
                )
              ]
            )
          ]
          spids: [111 113 123 -1]
        )
        (case_arm
          pat_list: [{<Id.Lit_Star '*'>}]
          action: [
            (C {<echo>} 
              {
                (DQ <'Usage: '> 
                  (command_sub
                    left_token: <Id.Left_Backtick '`'>
                    child: (C {<basename>} {($ Id.VSub_Number '$0')})
                  ) <' <Input> <Output>'>
                )
              }
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
          spids: [126 128 -1 149]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (C {<Id.Lit_LBracket '['>} {<Id.KW_Bang '!'>} {<-r>} {($ Id.VSub_DollarName '$OLDTAB')} 
                  {<Id.Lit_RBracket ']'>}
                )
              ]
            )
          action: [
            (C {<echo>} 
              {
                (DQ 
                  (command_sub
                    left_token: <Id.Left_Backtick '`'>
                    child: (C {<basename>} {($ Id.VSub_Number '$0')})
                  ) <': '> ($ Id.VSub_DollarName '$OLDTAB') <' does not exist or is unreadable.'>
                )
              }
            )
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
          spids: [152 164]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Simple
                  words: [{<touch>} {($ Id.VSub_DollarName '$NEWTAB')}]
                  redirects: [
                    (redir
                      op: <Id.Redir_Great '2>'>
                      loc: (redir_loc.Fd fd:2)
                      arg: {<'/dev/null'>}
                    )
                  ]
                  do_fork: T
                )
              ]
            )
          action: [(C {<Id.Lit_Colon ':'>})]
          spids: [190 200]
        )
      ]
      else_action: [
        (C {<echo>} 
          {
            (DQ 
              (command_sub
                left_token: <Id.Left_Backtick '`'>
                child: (C {<basename>} {($ Id.VSub_Number '$0')})
              ) <': cannot write to '> ($ Id.VSub_DollarName '$NEWTAB') <.>
            )
          }
        )
        (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
      ]
    )
    (command.Simple
      words: [{<cat>}]
      redirects: [
        (redir
          op: <Id.Redir_DLess '<<'>
          loc: (redir_loc.Fd fd:0)
          arg: 
            (redir_param.HereDoc
              here_begin: {<END_OF_HEADER>}
              here_end_span_id: 288
              stdin_parts: [
                <'# /etc/bootptab: database for bootp server (/etc/bootpd)\n'>
                <'# This file was generated automagically\n'>
                <'\n'>
                <'# Blank lines and lines beginning with \'#\' are ignored.\n'>
                <'#\n'>
                <'# Legend:\t(see bootptab.5)\n'>
                <'#\tfirst field -- hostname (not indented)\n'>
                <'#\tbf -- bootfile\n'>
                <'#\tbs -- bootfile size in 512-octet blocks\n'>
                <'#\tcs -- cookie servers\n'>
                <'#\tdf -- dump file name\n'>
                <'#\tdn -- domain name\n'>
                <'#\tds -- domain name servers\n'>
                <'#\tef -- extension file\n'>
                <'#\tgw -- gateways\n'>
                <'#\tha -- hardware address\n'>
                <'#\thd -- home directory for bootfiles\n'>
                <'#\thn -- host name set for client\n'>
                <'#\tht -- hardware type\n'>
                <'#\tim -- impress servers\n'>
                <'#\tip -- host IP address\n'>
                <'#\tlg -- log servers\n'>
                <'#\tlp -- LPR servers\n'>
                <'#\tns -- IEN-116 name servers\n'>
                <'#\tra -- reply address\n'>
                <'#\trl -- resource location protocol servers\n'>
                <'#\trp -- root path\n'>
                <'#\tsa -- boot server address\n'>
                <'#\tsm -- subnet mask\n'>
                <'#\tsw -- swap server\n'>
                <'#\ttc -- template host (points to similar host entry)\n'>
                <'#\ttd -- TFTP directory\n'>
                <'#\tto -- time offset (seconds)\n'>
                <'#\tts -- time servers\n'>
                <'#\tvm -- vendor magic number\n'>
                <'#\tTn -- generic option tag n\n'>
                <'#\n'>
                <'# Be careful about including backslashes where they\'re needed.  Weird (bad)\n'>
                <'# things can happen when a backslash is omitted where one is intended.\n'>
                <'# Also, note that generic option data must be either a string or a\n'>
                <'# sequence of bytes where each byte is a two-digit hex value.\n'>
                <'\n'>
                <'# First, we define a global entry which specifies the stuff every host uses.\n'>
                <'# (Host name lookups are relative to the domain: your.domain.name)\n'>
                <'\n'>
              ]
            )
        )
        (redir
          op: <Id.Redir_DGreat '>>'>
          loc: (redir_loc.Fd fd:1)
          arg: {($ Id.VSub_DollarName '$NEWTAB')}
        )
      ]
      do_fork: T
    )
    (command.Pipeline
      children: [
        (command.Simple
          words: [{<sed>} {<-e>} {(SQ <'s/[:-]//g'>)}]
          redirects: [
            (redir
              op: <Id.Redir_Less '<'>
              loc: (redir_loc.Fd fd:0)
              arg: {($ Id.VSub_DollarName '$OLDTAB')}
            )
          ]
          do_fork: T
        )
        (command.Simple
          words: [
            {<nawk>}
            {
              (SQ <'BEGIN\t{ PART = 0 ; FIELD=0 ; BOOTPATH="unset" ; BOOTFILE="unset" }\n'> 
                <'\t/^%%/\t{\n'> <'\t\t\t\tPART = 1\n'> 
                <
'\t\t\t\tprintf ".default:\\\\\\n\\t:ht=ether:\\\\\\n\\t:hn:\\\\\\n\\t:dn=your.domain.name:\\\\\\n\\t:ds=your,dns,servers:\\\\\\n\\t:sm=255.255.0.0:\\\\\\n\\t:hd=%s:\\\\\\n\\t:rp=%s:\\\\\\n\\t:td=%s:\\\\\\n\\t:bf=%s:\\\\\\n\\t:to=auto:\\n\\n", BOOTPATH, BOOTPATH, BOOTPATH, BOOTFILE\n'
                > <'\t\t\t\tnext\n'> <'\t\t\t}\n'> <'\t/^$/\t{ next }\n'> <'\t/^#/\t{ next }\n'> <'\t\t{\n'> 
                <'\t\t\tif ( PART == 0 && FIELD < 2 )\n'> <'\t\t  \t{\n'> <'\t\t\t\tif ( FIELD == 0 ) BOOTPATH=$1\n'> <'\t\t\t\tif ( FIELD == 1 ) BOOTFILE=$1\n'> 
                <'\t\t\t\tFIELD++\n'> <'\t\t\t}\n'> <'\t\t}\n'> <'\t\t{\n'> <'\t\t\tif ( PART == 1 )\n'> <'\t\t\t{\n'> <'\t\t\t\tHOST=$1\n'> 
                <'\t\t\t\tHA=$3\n'> <'\t\t\t\tIP=$4\n'> <'\t\t\t\tBF=$5\n'> 
                <
'\t\t\t\tprintf "%s:\\\\\\n\\t:tc=.default:\\\\\\n\\t:ha=0x%s:\\\\\\n\\t:ip=%s:\\\\\\n\\t:bf=%s:\\n", HOST, HA, IP, BF\n'
                > <'\t\t\t}\n'> <'\t\t}'>
              )
            }
          ]
          redirects: [
            (redir
              op: <Id.Redir_DGreat '>>'>
              loc: (redir_loc.Fd fd:1)
              arg: {($ Id.VSub_DollarName '$NEWTAB')}
            )
          ]
          do_fork: T
        )
      ]
      negated: F
    )
    (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<0>})
  ]
)