oil AST

(command.CommandList
  children: [
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {<-r>} {<'/etc/defaults/rc.conf'>} {<Id.Lit_RBracket ']'>})
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [(C {<.>} {<'/etc/defaults/rc.conf'>}) (C {<source_rc_confs>})]
          spids: [149 160]
        )
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: (C {<Id.Lit_LBracket '['>} {<-r>} {<'/etc/rc.conf'>} {<Id.Lit_RBracket ']'>})
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [(C {<.>} {<'/etc/rc.conf'>})]
          spids: [170 181]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:EDITOR)
          op: assign_op.Equal
          rhs: 
            {
              (braced_var_sub
                token: <Id.VSub_Name EDITOR>
                suffix_op: 
                  (suffix_op.Unary
                    tok: <Id.VTest_ColonHyphen ':-'>
                    arg_word: 
                      {<Id.Lit_Slash '/'> <usr> <Id.Lit_Slash '/'> <bin> <Id.Lit_Slash '/'> <vi>}
                  )
              )
            }
          spids: [191]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:PAGER)
          op: assign_op.Equal
          rhs: 
            {
              (braced_var_sub
                token: <Id.VSub_Name PAGER>
                suffix_op: 
                  (suffix_op.Unary
                    tok: <Id.VTest_ColonHyphen ':-'>
                    arg_word: 
                      {<Id.Lit_Slash '/'> <usr> <Id.Lit_Slash '/'> <bin> <Id.Lit_Slash '/'> <more>}
                  )
              )
            }
          spids: [203]
        )
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:tempfoo)
          op: assign_op.Equal
          rhs: 
            {
              (command_sub
                left_token: <Id.Left_Backtick '`'>
                child: (C {<basename>} {($ Id.VSub_Number '$0')})
              )
            }
          spids: [216]
        )
      ]
    )
    (command.AndOr
      ops: [Id.Op_DPipe]
      children: [
        (command.ShAssignment
          pairs: [
            (assign_pair
              lhs: (sh_lhs_expr.Name name:TMPFILE)
              op: assign_op.Equal
              rhs: 
                {
                  (command_sub
                    left_token: <Id.Left_Backtick '`'>
                    child: (C {<mktemp>} {<-t>} {(${ Id.VSub_Name tempfoo)})
                  )
                }
              spids: [225]
            )
          ]
        )
        (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
      ]
    )
    (command.ShFunction
      name: get_yes_no
      body: 
        (BraceGroup
          children: [
            (command.WhileUntil
              keyword: <Id.KW_While while>
              cond: (condition.Shell commands:[(C {<true>})])
              body: 
                (command.DoGroup
                  children: [
                    (C {<echo>} {<-n>} {(DQ ($ Id.VSub_Number '$1') <' (Y/N) ? '>)})
                    (C {<read>} {<-t>} {<30>} {<a>})
                    (command.If
                      arms: [
                        (if_arm
                          cond: 
                            (condition.Shell
                              commands: [
                                (command.Sentence
                                  child: 
                                    (C {<Id.Lit_LBracket '['>} {($ Id.VSub_QMark '$?')} 
                                      {<Id.KW_Bang '!'> <Id.Lit_Equals '='>} {<0>} {<Id.Lit_RBracket ']'>}
                                    )
                                  terminator: <Id.Op_Semi _>
                                )
                              ]
                            )
                          action: [
                            (command.Sentence
                              child: 
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: (sh_lhs_expr.Name name:a)
                                      op: assign_op.Equal
                                      rhs: {(DQ <No>)}
                                      spids: [297]
                                    )
                                  ]
                                )
                              terminator: <Id.Op_Semi _>
                            )
                            (command.Sentence
                              child: (command.ControlFlow token:<Id.ControlFlow_Return return>)
                              terminator: <Id.Op_Semi _>
                            )
                          ]
                          spids: [280 294]
                        )
                      ]
                    )
                    (command.Case
                      to_match: {($ Id.VSub_DollarName '$a')}
                      arms: [
                        (case_arm
                          pat_list: [{<Id.Lit_LBracket '['> <Yy> <Id.Lit_RBracket ']'>}]
                          action: [
                            (command.Sentence
                              child: 
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: (sh_lhs_expr.Name name:a)
                                      op: assign_op.Equal
                                      rhs: {(DQ <Yes>)}
                                      spids: [323]
                                    )
                                  ]
                                )
                              terminator: <Id.Op_Semi _>
                            )
                            (command.ControlFlow
                              token: <Id.ControlFlow_Return return>
                            )
                          ]
                          spids: [318 321 331 -1]
                        )
                        (case_arm
                          pat_list: [{<Id.Lit_LBracket '['> <Nn> <Id.Lit_RBracket ']'>}]
                          action: [
                            (command.Sentence
                              child: 
                                (command.ShAssignment
                                  pairs: [
                                    (assign_pair
                                      lhs: (sh_lhs_expr.Name name:a)
                                      op: assign_op.Equal
                                      rhs: {(DQ <No>)}
                                      spids: [339]
                                    )
                                  ]
                                )
                              terminator: <Id.Op_Semi _>
                            )
                            (command.ControlFlow
                              token: <Id.ControlFlow_Return return>
                            )
                          ]
                          spids: [334 337 347 -1]
                        )
                        (case_arm
                          pat_list: [{<Id.Lit_Star '*'>}]
                          spids: [350 351 352 -1]
                        )
                      ]
                    )
                  ]
                )
            )
          ]
        )
    )
    (command.ShFunction
      name: restore_rules
      body: 
        (BraceGroup
          children: [
            (command.Simple
              words: [{<nohup>} {<sh>} {(${ Id.VSub_Name firewall_script)}]
              redirects: [
                (redir
                  op: <Id.Redir_Less '<'>
                  loc: (redir_loc.Fd fd:0)
                  arg: {<'/dev/null'>}
                )
                (redir
                  op: <Id.Redir_Great '>'>
                  loc: (redir_loc.Fd fd:1)
                  arg: {<'/dev/null'>}
                )
                (redir op:<Id.Redir_GreatAnd '2>&'> loc:(redir_loc.Fd fd:2) arg:{<1>})
              ]
              do_fork: T
            )
            (C {<rm>} {(${ Id.VSub_Name TMPFILE)})
            (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
          ]
        )
    )
    (command.Case
      to_match: {(DQ (${ Id.VSub_Name firewall_type))}
      arms: [
        (case_arm
          pat_list: [
            {<Id.Lit_LBracket '['> <Cc> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ll> 
              <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ii> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ee> <Id.Lit_RBracket ']'> 
              <Id.Lit_LBracket '['> <Nn> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Tt> <Id.Lit_RBracket ']'>
            }
            {<Id.Lit_LBracket '['> <Cc> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ll> 
              <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Oo> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ss> <Id.Lit_RBracket ']'> 
              <Id.Lit_LBracket '['> <Ee> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Dd> <Id.Lit_RBracket ']'>
            }
            {<Id.Lit_LBracket '['> <Oo> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Pp> 
              <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ee> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Nn> <Id.Lit_RBracket ']'>
            }
            {<Id.Lit_LBracket '['> <Ss> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ii> 
              <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Mm> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Pp> <Id.Lit_RBracket ']'> 
              <Id.Lit_LBracket '['> <Ll> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ee> <Id.Lit_RBracket ']'>
            }
            {<Id.Lit_LBracket '['> <Uu> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Nn> 
              <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Kk> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Nn> <Id.Lit_RBracket ']'> 
              <Id.Lit_LBracket '['> <Oo> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Ww> <Id.Lit_RBracket ']'> <Id.Lit_LBracket '['> <Nn> 
              <Id.Lit_RBracket ']'>
            }
          ]
          action: [
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:edit_file)
                  op: assign_op.Equal
                  rhs: {(DQ (${ Id.VSub_Name firewall_script))}
                  spids: [510]
                )
              ]
            )
            (command.ShAssignment
              pairs: [
                (assign_pair
                  lhs: (sh_lhs_expr.Name name:rules_edit)
                  op: assign_op.Equal
                  rhs: {<no>}
                  spids: [518]
                )
              ]
            )
          ]
          spids: [412 507 522 -1]
        )
        (case_arm
          pat_list: [{<Id.Lit_Star '*'>}]
          action: [
            (command.If
              arms: [
                (if_arm
                  cond: 
                    (condition.Shell
                      commands: [
                        (command.Sentence
                          child: 
                            (C {<Id.Lit_LBracket '['>} {<-r>} {(DQ (${ Id.VSub_Name firewall_type))} 
                              {<Id.Lit_RBracket ']'>}
                            )
                          terminator: <Id.Op_Semi _>
                        )
                      ]
                    )
                  action: [
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:edit_file)
                          op: assign_op.Equal
                          rhs: {(DQ (${ Id.VSub_Name firewall_type))}
                          spids: [546]
                        )
                      ]
                    )
                    (command.ShAssignment
                      pairs: [
                        (assign_pair
                          lhs: (sh_lhs_expr.Name name:rules_edit)
                          op: assign_op.Equal
                          rhs: {<yes>}
                          spids: [554]
                        )
                      ]
                    )
                  ]
                  spids: [528 543]
                )
              ]
            )
          ]
          spids: [524 525 561 -1]
        )
      ]
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {<-f>} {(${ Id.VSub_Name edit_file) <.new>} 
                      {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (C {<get_yes_no>} {(DQ <'A new rules file already exists, do you want to use it'>)})
            (command.AndOr
              ops: [Id.Op_DAmp]
              children: [
                (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName '$a')} {<Id.Lit_Equals '='>} {(SQ <No>)} 
                  {<Id.Lit_RBracket ']'>}
                )
                (C {<cp>} {(${ Id.VSub_Name edit_file)} {(${ Id.VSub_Name edit_file) <.new>})
              ]
            )
          ]
          spids: [566 580]
        )
      ]
      else_action: [(C {<cp>} {(${ Id.VSub_Name edit_file)} {(${ Id.VSub_Name edit_file) <.new>})]
    )
    (C {<trap>} {<restore_rules>} {<SIGHUP>})
    (C {(${ Id.VSub_Name EDITOR)} {(${ Id.VSub_Name edit_file) <.new>})
    (C {<get_yes_no>} {(DQ <'Do you want to install the new rules'>)})
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName '$a')} {<Id.Lit_Equals '='>} {(SQ <No>)} 
          {<Id.Lit_RBracket ']'>}
        )
        (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<1>})
      ]
    )
    (command.Simple
      words: [{<cat>}]
      redirects: [
        (redir
          op: <Id.Redir_DLess '<<'>
          loc: (redir_loc.Fd fd:0)
          arg: 
            (redir_param.HereDoc
              here_begin: {<Id.KW_Bang '!'>}
              here_end_span_id: 687
              stdin_parts: [
                <'The rules will be changed now. If the message \'Type y to keep the new\n'>
                <'rules\' does not appear on the screen or the y key is not pressed in 30\n'>
                <'seconds, the original rules will be restored.\n'>
                <'The TCP/IP connections might be broken during the change. If so, restore\n'>
                <'the ssh/telnet connection being used.\n'>
              ]
            )
        )
      ]
      do_fork: T
    )
    (command.If
      arms: [
        (if_arm
          cond: 
            (condition.Shell
              commands: [
                (command.Sentence
                  child: 
                    (C {<Id.Lit_LBracket '['>} {(${ Id.VSub_Name rules_edit)} {<Id.Lit_Equals '='>} 
                      {<yes>} {<Id.Lit_RBracket ']'>}
                    )
                  terminator: <Id.Op_Semi _>
                )
              ]
            )
          action: [
            (command.Simple
              words: [
                {<nohup>}
                {<sh>}
                {(${ Id.VSub_Name firewall_script)}
                {(${ Id.VSub_Name firewall_type) <.new>}
              ]
              redirects: [
                (redir
                  op: <Id.Redir_Less '<'>
                  loc: (redir_loc.Fd fd:0)
                  arg: {<'/dev/null'>}
                )
                (redir
                  op: <Id.Redir_Great '>'>
                  loc: (redir_loc.Fd fd:1)
                  arg: {(${ Id.VSub_Name TMPFILE)}
                )
                (redir op:<Id.Redir_GreatAnd '2>&'> loc:(redir_loc.Fd fd:2) arg:{<1>})
              ]
              do_fork: T
            )
          ]
          spids: [689 704]
        )
      ]
      else_action: [
        (command.Simple
          words: [{<nohup>} {<sh>} {(${ Id.VSub_Name firewall_script) <.new>}]
          redirects: [
            (redir op:<Id.Redir_Less '<'> loc:(redir_loc.Fd fd:0) arg:{<'/dev/null'>})
            (redir
              op: <Id.Redir_Great '>'>
              loc: (redir_loc.Fd fd:1)
              arg: {(${ Id.VSub_Name TMPFILE)}
            )
            (redir op:<Id.Redir_GreatAnd '2>&'> loc:(redir_loc.Fd fd:2) arg:{<1>})
          ]
          do_fork: T
        )
      ]
    )
    (command.Sentence child:(C {<sleep>} {<2>}) terminator:<Id.Op_Semi _>)
    (C {<get_yes_no>} {(DQ <'Would you like to see the resulting new rules'>)})
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName '$a')} {<Id.Lit_Equals '='>} {(SQ <Yes>)} 
          {<Id.Lit_RBracket ']'>}
        )
        (C {(${ Id.VSub_Name PAGER)} {(${ Id.VSub_Name TMPFILE)})
      ]
    )
    (C {<get_yes_no>} {(DQ <'Type y to keep the new rules'>)})
    (command.AndOr
      ops: [Id.Op_DAmp]
      children: [
        (C {<Id.Lit_LBracket '['>} {($ Id.VSub_DollarName '$a')} {<Id.KW_Bang '!'> <Id.Lit_Equals '='>} 
          {(SQ <Yes>)} {<Id.Lit_RBracket ']'>}
        )
        (C {<restore_rules>})
      ]
    )
    (command.ShAssignment
      pairs: [
        (assign_pair
          lhs: (sh_lhs_expr.Name name:DATE)
          op: assign_op.Equal
          rhs: {(command_sub left_token:<Id.Left_Backtick '`'> child:(C {<date>} {(DQ <'+%Y%m%d%H%M'>)}))}
          spids: [821]
        )
      ]
    )
    (C {<cp>} {(${ Id.VSub_Name edit_file)} 
      {(${ Id.VSub_Name edit_file) <.> ($ Id.VSub_DollarName '$DATE')}
    )
    (C {<mv>} {(${ Id.VSub_Name edit_file) <.new>} {(${ Id.VSub_Name edit_file)})
    (command.Simple
      words: [{<cat>}]
      redirects: [
        (redir
          op: <Id.Redir_DLess '<<'>
          loc: (redir_loc.Fd fd:0)
          arg: 
            (redir_param.HereDoc
              here_begin: {<Id.KW_Bang '!'>}
              here_end_span_id: 870
              stdin_parts: [
                <'The new rules are now installed. The previous rules have been preserved in\n'>
                <'the file '>
                (${ Id.VSub_Name edit_file)
                <.>
                ($ Id.VSub_DollarName '$DATE')
                <'\n'>
              ]
            )
        )
      ]
      do_fork: T
    )
    (command.Pipeline
      children: [
        (C {<diff>} {<-F>} {(DQ <'^# .*[A-Za-z]'>)} {<-u>} 
          {(${ Id.VSub_Name edit_file) <.> ($ Id.VSub_DollarName '$DATE')} {(${ Id.VSub_Name edit_file)}
        )
        (C {<mail>} {<-s>} 
          {
            (DQ (command_sub left_token:<Id.Left_Backtick '`'> child:(C {<hostname>})) 
              <' Firewall rule change'>
            )
          } {<root>}
        )
      ]
      negated: F
    )
    (C {<rm>} {(${ Id.VSub_Name TMPFILE)})
    (command.ControlFlow token:<Id.ControlFlow_Exit exit> arg_word:{<0>})
  ]
)