awsetbg(1) on Linux
The text 676b5aa0cf57, as Debian 6.0 (Squeeze) shipped it.
awesome wrapper tool to set background
Flags it lists
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-A -
-C -
-F -
-R -
-T -
-U -
-a -
-c -
-f -
-h -
-i -
-l -
-m -
-p -
-r -
-t -
-u