(List
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('RTPW', {[LIT_CHARS ./rtpw]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('DEST_PORT', {[LIT_CHARS 9999]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('DURATION', {[LIT_CHARS 3]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('key', {[LIT_CHARS 2b2edc5034f61a72345ca5986d7bfd0189aa6dc2ecab32fd9af74df6dfc6]})])
  (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('ARGS', {[DQ [LIT_CHARS "-k "][VarSub key][LIT_CHARS " -ae"]]})])
  (Com {[LIT_CHARS killall]} {[LIT_CHARS rtpw]}
    <
    (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT "2>"> 2),
    >
  )
  (If
    (Com {[LIT_CHARS test]} {[LIT_CHARS -x]} {[VarSub RTPW]})
    (List
      (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": starting rtpw receiver process... "]]})
      (Fork
        (Com {[VarSub RTPW]} {[VarSub *]} {[VarSub ARGS]} {[LIT_CHARS -r]} {[LIT_CHARS 0.0.0.0]} {[VarSub DEST_PORT]})
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('receiver_pid', {[VarSub !]})])
      (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": receiver PID = "][VarSub receiver_pid]]})
      (Com {[LIT_CHARS sleep]} {[LIT_CHARS 1]})
      (Pipeline
        (Com {[LIT_CHARS ps]})
        (Com {[LIT_CHARS grep]} {[LIT_CHARS -q]} {[VarSub receiver_pid]})
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('retval', {[VarSub ?]})])
      (Com {[LIT_CHARS echo]} {[VarSub retval]})
      (If
        (Com {[LIT_OTHER "["]} {[VarSub retval]} {[LIT_OTHER "!"] [LIT_OTHER "="]} {[LIT_CHARS 0]} {[LIT_OTHER "]"]})
        (List
          (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": error"]]})
          (Com {[LIT_CHARS exit]} {[LIT_CHARS 254]})
        )
      )
      (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": starting rtpw sender process..."]]})
      (Fork
        (Com {[VarSub RTPW]} {[VarSub *]} {[VarSub ARGS]} {[LIT_CHARS -s]} {[LIT_CHARS 127.0.0.1]} {[VarSub DEST_PORT]})
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('sender_pid', {[VarSub !]})])
      (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": sender PID = "][VarSub sender_pid]]})
      (Pipeline
        (Com {[LIT_CHARS ps]})
        (Com {[LIT_CHARS grep]} {[LIT_CHARS -q]} {[VarSub sender_pid]})
      )
      (= scope=<EAssignScope.GLOBAL 1> flags=0 words=[] bindings=[('retval', {[VarSub ?]})])
      (Com {[LIT_CHARS echo]} {[VarSub retval]})
      (If
        (Com {[LIT_OTHER "["]} {[VarSub retval]} {[LIT_OTHER "!"] [LIT_OTHER "="]} {[LIT_CHARS 0]} {[LIT_OTHER "]"]})
        (List
          (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": error"]]})
          (Com {[LIT_CHARS exit]} {[LIT_CHARS 255]})
        )
      )
      (Com {[LIT_CHARS sleep]} {[VarSub DURATION]})
      (Com {[LIT_CHARS kill]} {[VarSub receiver_pid]})
      (Com {[LIT_CHARS kill]} {[VarSub sender_pid]})
      (Com {[LIT_CHARS wait]} {[VarSub receiver_pid]})
      (Com {[LIT_CHARS wait]} {[VarSub sender_pid]})
      (Com {[LIT_CHARS echo]} {[VarSub 0]} {[DQ [LIT_CHARS ": done (test passed)"]]})
    )
    (ElseTrue)
    (List
      (Com {[LIT_CHARS echo]} {[DQ [LIT_CHARS "error: can't find executable"]]} {[VarSub RTPW]})
      (Com {[LIT_CHARS exit]} {[LIT_CHARS 1]})
    )
  )
)