#22064: airodump-ng can eat 100% of CPU
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Reporter: notorand | Owner: developers
Type: defect | Status: new
Priority: low | Milestone:
Component: packages | Version: Chaos Calmer 15.05
Keywords: aircrack-ng, airodump-ng |
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airodump-ng runs always as an interactive program and thus polls for user
input from stdin in a dedicated thread.
If run with input redirected (from /dev/null for example), that thread
will run very fast thus causing the whole program to easily eat 100% of
CPU time.
Within OpenWRT it's quite unlikely that airodump-ng will be actually run
interactively from command line. It'll be instead run within scripts.
Failing to properlu redirect the stdin, will stop the program from running
in the background.
A workaround is to use "screen" to run airodump-ng but the load, while
lower than 100%, remains high.
A solution could be not to start the polling thread at all (thus disabling
the user input altogether) when stdin is not a terminal.
I enclose here a small patch to Aircrack-g v1.2 rc2 (current) that has
also been submitted to the author.
[[http://forum.aircrack-ng.org/index.php/topic,1274.0.html|Reference]]
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Ticket URL: <https://dev.openwrt.org/ticket/22064>
OpenWrt <http://openwrt.org>
Opensource Wireless Router Technology
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