Nameserver information to network block

[jkauerl]

This PR is the first implementation to add more information to the network block.

The previous discussion was held in the following issue #2053. Specifically the first step of reading the nameservers saved in etc/resolv.conf.

It files that are modified are netlinks.rs and net.rs. With the former being the one that changes the most by creating a function to read the file, modify the Device struct and the last file by updating the documentation and adding the information to be displayed.

[MaxVerevkin]

LGTM 👍

[jkauerl]

Should I squash the commits into a single one or it is fine the way it is?

[MaxVerevkin]

Should I squash the commits into a single one or it is fine the way it is?

I usually do "squash and merge", so no need to do it manually.

[matthiaskrgr]

Looks like this breaks the net block

[[block]]
block = "net"
device = "wlp3s0"
format = "$icon $signal_strength $speed_down $graph_down $speed_up $graph_up $frequency"
missing_format = "no net"

[[block]]
block = "net"
device = "enp2s0f0"
format = " $speed_down $graph_down $speed_up $graph_up"

I only get "Failed to read nameservers" twice with this.

[MaxVerevkin]

@matthiaskrgr can you share the output of cat /etc/resolv.conf?

[matthiaskrgr]

# Generated by NetworkManager
search speedport.ip
nameserver 192.168.2.1
nameserver fe80::1%wlp3s0

[MaxVerevkin]

Hmm, we currently don't handle the %wlp3s0 syntax. By the way, what does it do? From a quick search I couldn't find anything.

[matthiaskrgr]

seems to be the wifi? https://www.reddit.com/r/linuxquestions/comments/rvj03f/whats_wlp3s0_and_why_isnt_it_wlan0_anymore/

[MaxVerevkin]

I mean in the context of resolv.conf. Is it that this nameserver is interface-specific?

[MaxVerevkin]

Looks like this breaks the net block

[[block]]
block = "net"
device = "wlp3s0"
format = "$icon $signal_strength $speed_down $graph_down $speed_up $graph_up $frequency"
missing_format = "no net"

[[block]]
block = "net"
device = "enp2s0f0"
format = " $speed_down $graph_down $speed_up $graph_up"

I only get "Failed to read nameservers" twice with this.

Now tracked in #2080