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Prefer ip over ifconfig for i/f detection.

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`ifconfig`'s formatting doesn't cope well with long interface names. In
these cases it will eat up the whitespace separating the name from the
text "Link" in the output, which makes parsing the output problematic.

e.g. `ifconfig`:

    wlp0s20f0u2Link encap:Ethernet  HWaddr 00:AA:BB:CC:DD:EE

v.s `ip`:

   21: wlp0s20f0u2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc \
       mq state UP group default qlen 1000

This commit swaps the order of detection inside
`_p9k_prompt_net_iface_async()`, so that `ip` will be preferred.

`ifconfig` is deprecated by distros in favour of `ip`, so this will
often be an incredibly marginal performance boost :)

NOTE: this commit does not address the problem with using `ifconfig`. I
don't understand the zsh regex, so have not touched it.
This commit is contained in:
Jonathan Sambrook 2022-11-14 13:27:46 +00:00
parent 8c55eb4fa3
commit 5691a418e0
1 changed files with 8 additions and 8 deletions
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16
internal/p10k.zsh
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@ -5721,19 +5721,19 @@ function _p9k_prompt_net_iface_async() {
# netstat -inbI en0
local iface ip line var
typeset -a iface2ip ips ifaces
if (( $+commands[ifconfig] )); then
for line in ${(f)"$(command ifconfig 2>/dev/null)"}; do
if [[ $line == (#b)([^[:space:]]##):[[:space:]]##flags=([[:xdigit:]]##)'<'* ]]; then
[[ $match[2] == *[13579bdfBDF] ]] && iface=$match[1] || iface=
if (( $+commands[ip] )); then
for line in ${(f)"$(command ip -4 a show 2>/dev/null)"}; do
if [[ $line == (#b)<->:[[:space:]]##([^:]##):[[:space:]]##\<([^\>]#)\>* ]]; then
[[ ,$match[2], == *,UP,* ]] && iface=$match[1] || iface=
elif [[ -n $iface && $line == (#b)[[:space:]]##inet[[:space:]]##([0-9.]##)* ]]; then
iface2ip+=($iface $match[1])
iface=
fi
done
elif (( $+commands[ip] )); then
for line in ${(f)"$(command ip -4 a show 2>/dev/null)"}; do
if [[ $line == (#b)<->:[[:space:]]##([^:]##):[[:space:]]##\<([^\>]#)\>* ]]; then
[[ ,$match[2], == *,UP,* ]] && iface=$match[1] || iface=
elif (( $+commands[ifconfig] )); then
for line in ${(f)"$(command ifconfig 2>/dev/null)"}; do
if [[ $line == (#b)([^[:space:]]##):[[:space:]]##flags=([[:xdigit:]]##)'<'* ]]; then
[[ $match[2] == *[13579bdfBDF] ]] && iface=$match[1] || iface=
elif [[ -n $iface && $line == (#b)[[:space:]]##inet[[:space:]]##([0-9.]##)* ]]; then
iface2ip+=($iface $match[1])
iface=