Adding a timeout when using sftp in a script?


 
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# 1  
Old 10-30-2018
Adding a timeout when using sftp in a script?

Hello guys.

I need some help. First of all, sorry about my english, that is not my native languaje.

I have a bash script in Solaris with the next lines:

Quote:
#!/bin/sh

echo "Running stfp"`date`
/export/user1/sftp.sh

echo "Adjustments" `date`
/export/user1/last_date/fixes.sh

cd /export/user1/

echo "Processing: " `date`
/export/user1/addtoBD.sh

echo "End : "`date`
And the sftp.sh has this:

Quote:
#!/bin/sh
# sample automatic ftp script to dump a file
USER="exercise"
HOST="182.21.225.36"
sftp $USER@$HOST << EOF
cd downs
get * /export/user1/inv
quit
EOF

The problem is that sometimes the sftp takes a long of time. I mean, 2 or 3 hours when it should be no more than 1 minute. I think there is a problem in the network, but i do not care about that in this moment.

So, i need to "cancel" that sftp and continue to the next line. It does not matter if the stfp is not finished.

I mean, can i add some kind of timeout to the sftp? I.e. 5 minutes. If it takes more than 5 minutes, continue to the next line.

Is it possible?



Thanks in advance.
Regards!
# 2  
Old 10-30-2018
Hi,

I'm not aware of a way of timing out a single file transfer and moving to the next, however I think I would attempt to resolve the overall time.

So you could make the logging more verbose and see if there is an issue, perhaps the "cd" is failing?

Try sftp -v in the shell or even sftp -v -v -v which is the maximum level of reporting and check the output for any errors.

In the event that the network has a problem, which you do suggest - involve the network team if you have one.

Regards

Gull04
# 3  
Old 10-30-2018
Quote:
Originally Posted by gull04
Hi,

I'm not aware of a way of timing out a single file transfer and moving to the next, however I think I would attempt to resolve the overall time.

So you could make the logging more verbose and see if there is an issue, perhaps the "cd" is failing?

Try sftp -v in the shell or even sftp -v -v -v which is the maximum level of reporting and check the output for any errors.

In the event that the network has a problem, which you do suggest - involve the network team if you have one.

Regards

Gull04

Hello. That script runs every day in the morning, and the problem happens only a few times. Maybe 1 one time in the entire week.

I know we have to check where is the problem of the delay but in this moment i need to forget that and find a way to continue to the next line when the sftp is taking too long but i canīt find the solution.

Thanks anyway, you are very kind!
# 4  
Old 10-30-2018
Hi,

A little bit of an update to add to this,

You can it would seem just use one of the ssh options, the change required would probably be straight forward - as follows;

Code:
sftp $USER@$HOST -o ConnectTimeout=nn -o BatchMode=yes << EOF

The Connect Timeout value in seconds, you should be able to investigate with any error codes.

Regards

Gull04
# 5  
Old 10-30-2018
Quote:
Originally Posted by gull04
Hi,

A little bit of an update to add to this,

You can it would seem just use one of the ssh options, the change required would probably be straight forward - as follows;

Code:
sftp $USER@$HOST -o ConnectTimeout=nn -o BatchMode=yes << EOF

The Connect Timeout value in seconds, you should be able to investigate with any error codes.

Regards

Gull04
Thanks, but unfortunately it does not work.

Quote:
./test.sh
Usage: sftp [-vC1] [-b batchfile] [-o option] [-s subsystem|path]
[-F config] [-P direct server path] [-S program] [-B buffer_size]
[-R num_requests] [user@]host[:file [file]]
And when i deletes the "-o ConnectTimeout=20 -o BatchMode=yes" it works. It seems that is only for the ssh command.

Thanks again.

Last edited by giolita25; 10-30-2018 at 01:12 PM..
# 6  
Old 10-30-2018
sftp is ssh. But only a few implementations of ssh bother supporting that option.
# 7  
Old 10-30-2018
Hi Sorry,

You can try using;

Code:
sftp -o ConnectTimeout=10 -o BatchMode=yes -o StrictHostKeyChecking=yes $USER@$HOST << EOF

This is working on one of my Solaris installations SunOS cathsunvs04 5.10 Generic_150400-46 sun4v sparc sun4v haven't tested anywhere else.

Regards

Gull04
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