I'm a noob, but got to start somewhere..
This feed for openwrt contains jq. There is a patch included that strips y0,y1,j0,j1 from libm.h. That means no bessel functions (i don't think i'll miss it).
If you've downloaded and setup a openwrt buildsystem. Add src-git myfeeds https://github.com/profOnno/openwrt-myfeeds.git to the feeds.conf.default. Do a scripts/feeds update myfeeds en then scripts/feeds install jq if you want to install jq. Then, when you do a make menuconfig, jq can be found in the utilities.
I'm planning to use jq ncat (the one in the Network/NMAP menu, for unix sockets) and bash to work in Docker using a openwrt image.
So you can do : echo -e "GET /containers/json HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed -e '1,/^\r$/d' |jq .
The sed part removes the header, jq gives a nice output.
To show the first name of each container.
echo -e "GET /containers/json HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed -e '1,/^\r$/d' |jq '.[] |.Names[0]'
Fancy..
echo -e "GET /containers/json HTTP/1.0\r\n" | nc -U /var/run/docker.sock | sed -e '1,/^\r$/d' |jq '.[] |"\(.Names[0]), \(.Status)"'