Can I set a timeout to cp?

[Eric Antunes]

Will this work, anylysing the cp.log and, simultaneously, counting?

cp -R $SOURCE_DIR/* $DESTINATION_DIR > /disc2/.../cp.log
2>&1

[Sandman!]

> The problem is: when the NFS server is up everything runs ok but, when it is
> down(actual situation), it stops at the cp instruction.

that's exactly why you need to first ping the nfs server && then kick-off the copy.

ping && cp -R

The purpose here is that the entire command line works or fails as a unit. Only iff the ping succeeds does the copy kickoff and if the ping fails the copy never gets executed.

see script attached...

enjoy!!!

[A. Clay Stephenson]

Just because ping works (or for that matter doesn't work) is really no indication of the status of NFS. Moreover, the return status of ping is far from reliable. It will reurn non-zero for host not found but 0 if it can ing but with errors.

If this were me I would do something like this:

df -F nfs /desiredmountpoint

If that returns a zero status then you can assume that NFS is available. Of course, you need a timeout mechanism for this as well.

This would be my approach:

TDIR=${TMPDIR:-/var/tmp}

timeoutcmd.pl -t 20 "df -F nfs /desiredmountpoint" > /dev/null 2>/dev/null
STAT=${?}
if [[ ${STAT} -eq 0 ]] # df ok
then
timeoutcmd.pl -t 5400 "cp -p file1 file2 /desiredmountpoint" > /dev/null 2>/dev/null
STAT=${?}
if [[ ${STAT} -ne 0 ]]
then
echo "Cp failed; status ${STAT}" >&2
fi
else
echo "NFS unavailable; status ${STAT}" >&2
fi
exit ${STAT}


Note: This is not the same Perl script posted earlier:

[Eric Antunes]

Hi Clay,

I'm testing your perl script now. Is there any good manual about perl?

Hi Sandman,

The problem is that the command "ping && cp -R " never ends when the server is down (actual situation to test the script): I have to kill the ping processes...

Best Regards,

Eric Antunes

[Eric Antunes]

Clay,

With the NFS server down I get "NFS unavailable; status 127".


With the NFS server up, I still get "NFS unavailable; status 127"...

Thanks,

Eric Antunes

[Eric Antunes]

Ok,

From the command line, I get:

interpreter "/usr/bin/perl" not found

[Muthukumar_5]

can you find perl utility as,

find / -name "perl"

which perl

hth.

[Eric Antunes]

I found one perl interpreter in /usr/contrib/bin/perl...

[Muthukumar_5]

When you are going to ping then use finite count as,

ping -n 1

ping -n 1 1>/dev/null 2>&1
if [[ $? -eq 0 ]]
then
action;
else
echo 'server failed'
fi

hth.

[Eric Antunes]

Now (with /usr/contrib/bin/perl), I get:

"NFS unavailable; status 255"