Mailinglist Archive: opensuse (1540 mails)

[David Haller <dnh@xxxxxxxxxxxx>]

Hello,

On Wed, 10 Feb 2010, David C. Rankin wrote:
> On 02/10/2010 01:22 AM, Wong wrote:
[..]
> #!/bin/bash
> runfile=/tmp/chkdsl0.run

Bad. Use /var/run/

> cleanup() {
>  rm $runfile
> }

Should be:

    rm -f "$runfile"

> trap cleanup trap cleanup SIGINT SIGTERM EXIT
>
> if [[ ! -f $runfile ]]; then

A simple:

    if ! test -f "$runfile"; then

suffices and doesn't need bash.

>  touch $runfile

Should be:

    echo "$$" > "$runfile"

>  while :; do
>    if ! ping -q -c1 yahoo.com &>/dev/null; then

You can also check for the interface (with ifconfig or ip link show),
or ping the router, if you use one. I don't think yahoo'll like it to
be pinged every 60 seconds.

ifconfig:

    dev=dsl0
    
    if LC_ALL=C /sbin/ifconfig "$dev" | grep -q 'UP.*MTU'; then
        ## interface is up
    else

>       rcnetwork restart   # (as root, or 'sudo rcnetwork restart' with sudo)
>    fi
>    sleep 60
>  done
> fi

I can't look up or remember the 'ip' syntax (different system).

>       call it say 'chkdsl0.sh' and put it in say ~/Documents. Make it
>       executable with chmod +x chkdsl0.sh. Then just call it and
>       background it in your
> ~./bashrc with the following statement:
>
> ~/Documents/chkdsl10.sh &

That's what ~/bin/ is for! Such a script is definitely not a document.

> and your will then execute a ping check against yahoo once every 60
> seconds and if yahoo.com doesn't respond then you restart the network
> to regain dsl0. There are a lot of different ways to do this and this
> is just a very basic solution with a reasonable check to prevent
> duplicate check process with each start of a new shell that you can
> expand on. Good luck.

Start it in ~/.profile.

But actually, I'd do the check in/from whatever actually needs the
connection. Wong, could you elaborate on why you need to check the
connection?

HTH,
-dnh

-- 
So Linus, what are we doing tonight?
The same thing we do every night Tux. Try to take over the world!
-- 
To unsubscribe, e-mail: opensuse+unsubscribe@xxxxxxxxxxxx
For additional commands, e-mail: opensuse+help@xxxxxxxxxxxx