On Sat, Aug 22, 2020 at 11:53 AM Tom H <tomh0665@xxxxxxxxx> wrote:
>
> On Sat, Aug 22, 2020 at 1:57 AM ToddAndMargo via users
> <users@xxxxxxxxxxxxxxxxxxxxxxx> wrote:
> >
> > Followup: I create a number of bash functions to
> > handle the task(s). Thank you all for the help!
> >
> >
> > function GetIP () {
> > echo "$(ip -f inet route | grep -i $InetDev | grep -i src | awk
> > '{print $9}')"
> > }
> >
> >
> > function CheckInternetStatus () {
> > local GoogleDNS="8.8.8.8";
> > local RtnStr="$( ping -W .1 -c 1 $GoogleDNS | grep loss );"
> > # echo "RtnStatus = <$?> RtnStr = <$RtnStr>" > "/dev/tty"
> > if [[ "$RtnStr" == *", 0% packet loss"* ]]; then
> > echo "UP"
> > else
> > echo "DOWN"
> > fi
> > }
> >
> >
> > function GetPublicIP () {
> > local WIP=$(dig +short myip.opendns.com @resolver1.opendns.com)
> > # echo "WIP = <$WIP>" > "/dev/tty"
> > if [[ "$WIP" == *"not found"* || "$WIP" == *"no servers could be
> > reached"* ]]; then
> > WIP="Not Found"
> > fi
> >
> > echo $WIP
> > }
> >
> >
> > function GetGW () {
> > echo "$(route -n | grep eno2 | grep UG | sed -n 1,1p | awk '{print
> > $2}')"
> > }
> >
> >
> > function UpDownedEthernetDevices () {
> > local State=""
> > local LinkState=""
> >
> > for Line in $(nmcli device | grep ethernet | awk '{print $1}'); do
> > State="$(nmcli device | grep $Line | awk '{print $3}')"
> > LinkState="$(ip address | grep eno2 | awk -F "," '{print $3}')"
> > # echo "Line = <$Line> State = <$State> LinkState =
> > <$LinkState>')" > "/dev/tty"
> >
> > if [ "$State" == "disconnected" ]; then
> > echo "Reconnecting $Line" > "/dev/tty"
> > /usr/bin/nmcli device disconnect $Line
> > /usr/bin/nmcli device connect $Line
> > /usr/bin/nmcli connection down $Line
> > /usr/bin/nmcli connection up $Line
> >
> > elif [[ $LinkState == "DOWN" ]]; then
> > echo "Reattaching (link) $Line" > "/dev/tty"
> > beesu "ip link set $Line down; ip link set $Line up;"
> >
> > echo "Reconnecting $Line" > "/dev/tty"
> > /usr/bin/nmcli connection down $Line
> > /usr/bin/nmcli connection up $Line
> > fi
> > done
> > }
> >
> >
> > function DisplayStatus () {
> > NotifySound
> >
> > local Msg=""
> > local GW=""
> > local IP=""
> > local InternetStatus="$(CheckInternetStatus)"
> > local PublicIP=""
> >
> > # if [ -n "$(netstat -rn | grep -i $InetDev | grep -i UG)" ]; then
> > if [ "$InternetStatus" == "UP" ]; then
> > GW="$(GetGW)"
> > IP="$(GetIP)"
> > PublicIP="$(GetPublicIP)"
> >
> > # Msg+="$InetDev successfully started and is a gateway\n\n"
> > Msg+="Internet is $InternetStatus\n"
> > Msg+="IP=$IP\n"
> > Msg+="gw=$GW\n"
> > Msg+="Public IP=$PublicIP\n"
> >
> > echo -e $Msg > "/dev/tty"
> > zenity --title "$Title Status" --info --text "$Msg" --width=250
> >
> > else
> > Msg="Internet ($InetDev) is down"
> > echo -e $Msg > "/dev/tty"
> > zenity --title "$Title Status" --info --text "$Msg" --width=200
> > fi
> > }
>
>
> Without looking at what your functions are actually doing:-
>
>
> Things that I don't understand:
>
> 1) Why do you use "$InetDev" in GetIP and "eno2 in GetGW and
> UpDownedEthernetDevices?
>
> 2) Why do you use "-i" for grep in GetIP?
>
> 3) Why do you use "sed -n 1,1p" in GetGW?
>
> 4) Why do you use "route" in GetGW when you're using "ip" elsewhere
> and "net-tools" isn't installed by default?
>
>
> Use of awk
>
> 1) "grep search | awk {...}" is the same as "awk '/search/ {...}"
>
> 2) "grep search1 | grep search2 | awk {...}" is the same as "awk
> '/search1/ && /search2/ {...}"
Forgot
5) Why do you use "/usr/bin/nmcli" 6 times and "nmcli" twice? There's
no need for absolute paths.
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