kind=defined
names=opened?
visibility=public

--- opened? -> bool

syslog をオープンしていれば真を返す。

使用例
  require 'syslog'

  p Syslog.opened? #=> false
  Syslog.open("syslogtest")
  Syslog.log(Syslog::LOG_WARNING, "the sky is falling in %d seconds!", 100)
  p Syslog.opened? #=> true


