On Fri, Mar 9, 2018 at 8:32 PM, Phil Shafer <[email protected]> wrote: > Martin T writes: >>However, the actual point of my question was, that where do "show ipv6 >>neighbors" and similar commands take the column names and the answer >>seems to be, that this is hard-coded in the binary. For example >>nd6info in case of "show ipv6 neighbors". > > No, this isn't true. The CLI uses descriptions provided by the > developer to turn XML into human-readable text. Use "show ipv6 > neighbors | display xml" to see the raw XML. The nd6info utility > can generate it's own text version, but the UI plumbing invokes it > with the "-X" option to make XML content instead. The two are > likely similar, but the CLI doesn't use the text from nh6info. The > idea is to push all UI content into a single consistent code path. > > FYI: You might want to take a look at libxo which allows binaries > to generate both XML and text (and HTML and JSON) from the same > source code path. > > http://juniper.github.io/libxo/libxo-manual.html > > This is now part of FreeBSD, so one can say "df --libxo:XP" and get > pretty-printed XML output on a stock BSD system. > > (And no, we haven't moved nd6info over to libxo yet, but we should.) > > Thanks, > Phil
Saku, Phil, ok, I see. I didn't thought it from that angle. While for my specific script it would be convenient to have this CLI meta-data in the back-end data, then I guess it is indeed much better approach to keep those two separate. Phil, ok. Thanks for this information! In addition, this libxo is a clever approach. The reason I thought that column names are provided by the nd6info binary is that it contains printf format string(%-28s %-18s %-11s %-4u %-3s %-6s) and column descriptions: $ strings nd6info | grep Linklayer IPv6 Address Linklayer Address State Exp Rtr Secure Interface $ In addition, I didn't know that cli invokes it with "-X" option. Still, this makes one think where does cli take those column descriptions? My guess is that it comes from libnd6info-render.so library. regards, Martin _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
