(If
  (Com {[LIT_OTHER "["]} {[LIT_CHARS X] [DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]}) (Com redirects=[(FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT "2>"> 2)]{[LIT_CHARS md5sum]} {[LIT_CHARS -b]}) )]]} {[LIT_OTHER "!"] [LIT_OTHER "="]} {[LIT_CHARS X]} {[LIT_OTHER "]"]})
  (FunctionDef do_md5sum []
    (Com {[LIT_CHARS md5sum]} {[LIT_CHARS -b]} {[VarSub 1]})
  )
  (Com {[LIT_OTHER "["]} {[LIT_CHARS X] [DQ [ComSub (Pipeline (Com {[LIT_CHARS echo]}) (Com redirects=[(FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT "2>"> 2)]{[LIT_CHARS command]} {[LIT_CHARS md5]}) )]]} {[LIT_OTHER "!"] [LIT_OTHER "="]} {[LIT_CHARS X]} {[LIT_OTHER "]"]})
  (FunctionDef do_md5sum []
    (Pipeline
      (Com {[LIT_CHARS command]} {[LIT_CHARS md5]} {[VarSub 1]})
      (Com {[LIT_CHARS sed]} {[SQ <LIT_CHARS "s#MD5 (\\(.*\\)) = \\(.*\\)#\\2 *\\1#">]})
    )
  )
  (Com {[LIT_OTHER "["]} {[LIT_CHARS -x]} {[LIT_CHARS /sbin/md5]} {[LIT_OTHER "]"]})
  (FunctionDef do_md5sum []
    (Pipeline
      (Com {[LIT_CHARS /sbin/md5]} {[LIT_CHARS -r]} {[VarSub 1]})
      (Com {[LIT_CHARS sed]} {[SQ <LIT_CHARS "s/\\([0-9a-f]\\) [ *]*/\\1 */">]})
    )
  )
  (Com {[LIT_CHARS openssl]} {[LIT_CHARS version]}
    <
    (FilenameRedirectNode filename={[LIT_CHARS /dev/null]} <REDIR_GREAT ">"> 1),
    (DescriptorRedirectNode target={[LIT_CHARS 1]} <REDIR_GREATAND "2>&"> 2),
    >
  )
  (FunctionDef do_md5sum []
    (Pipeline
      (Com {[LIT_CHARS openssl]} {[LIT_CHARS md5]} {[VarSub 1]})
      (Com {[LIT_CHARS sed]} {[SQ <LIT_CHARS "s/MD5(\\(.*\\))= \\(.*\\)/\\2 *\\1/">]})
    )
  )
  (ElseTrue)
  (FunctionDef do_md5sum []
    (Com {[LIT_CHARS echo]} {[LIT_CHARS No]} {[LIT_CHARS md5sum]} {[LIT_CHARS program]} {[LIT_CHARS found]})
  )
)