53 lines
1.5 KiB
Text
53 lines
1.5 KiB
Text
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(local netlink (require :netlink))
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(local sock (netlink.socket))
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; (local { : view} (require :fennel))
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(fn assoc [tbl k v]
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(tset tbl k v)
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tbl)
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(fn parse-args [args]
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(match args
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["-v" & rest] (assoc (parse-args rest) :verbose true)
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["-t" timeout & rest] (assoc (parse-args rest) :timeout (tonumber timeout))
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[linkname "up"] {:link linkname :expecting "up"}
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[linkname "running"] {:link linkname :expecting "running"}
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[linkname "present"] {:link linkname :expecting "present"}
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[linkname nil] {:link linkname :expecting "present"}
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_ nil))
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(local parameters
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(or
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(parse-args arg)
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(assert false (.. "Usage: " (. arg 0) " [-v] ifname [present|up|running]"))))
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(fn run-events [evs]
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(each [_ v (ipairs evs)]
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(let [got
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(match v
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;; - up: Reflects the administrative state of the interface (IFF_UP)
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;; - running: Reflects the operational state (IFF_RUNNING).
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{:event "newlink" :name parameters.link :up :yes :running :yes}
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{:present true :up true :running true}
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{:event "newlink" :name parameters.link :up :yes}
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{:present :true :up true}
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{:event "newlink" :name parameters.link}
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{:present true }
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_
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{})]
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(when (. got parameters.expecting)
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(os.exit 0)))))
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(when parameters.verbose
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(print (.. (. arg 0) ": waiting for "
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parameters.link " to be " parameters.expecting)))
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(run-events (sock:query {:link true}))
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(while (sock:poll) (run-events (sock:event)))
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