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How to trap FTP error

Posted on 2011-09-06
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Last Modified: 2013-11-29
Dear Experts,

I have the following script. It set as a cron job. It works fine if the file is present on the server, but if it is not, the script hangs.
How can I trap the failure and then exit from the script?
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Comment
Question by:sfuk
8 Comments
 
LVL 15

Expert Comment

by:WalkaboutTigger
ID: 36491399
do an ls on the ftp server then perform a find or grep on "abc" or some known substring within the filename.
If no lines are returned, the file does not exist.
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Author Comment

by:sfuk
ID: 36491446
Thank you, WalkaboutTigger, for your quick response.

When i open ftp process, can I do something like

echo `ls -l abc*` > abc.log
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Author Comment

by:sfuk
ID: 36492515
I made the following changes/additions in my initial script and solved the problem.


#! /bin/bash

v_rundir="/home/abc"
v_ftp=`cat ftp.log | grep "not found" | wc -l`
cd $v_rundir
 
rm ftp.log

# Test to see if this process is already running...
if [ -e process.lck ] ; then   # if it is, then exit...
 exit
fi
echo $$ > process.lck     # otherwise, lock this process from duplicated execution...

#FTP Function
# Get the new pgp files...
sftp username@ftp4.server.com <<EOF >>/home/abc/ftp.log 2>&1
cd abc/Toabc
mget abc*.txt.pgp
rm abc*.txt.pgp
quit
EOF
if [ $v_ftp -ne "0" ]; then
rm process.lck
exit 1 
fi
exit

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Accepted Solution

by:
Duncan Roe earned 500 total points
ID: 36509767
Rather than run ftp with a here document, you have far more control if you drive it via expect. Picking up errors becomes almost a no-brainer. If you are interested, I can post an example or 2.
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LVL 53

Expert Comment

by:Dhaest
ID: 36947343
This question has been classified as abandoned and is closed as part of the Cleanup Program. See the recommendation for more details.
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