Shell Programming and Scripting

I want to transfer all details of sftp connection into a log file and spawn sftp $PCMSu@$FTP_LOC >> log_file is not working for me. Please suggest how to send the data to a log file that has all information if sftp connection is successful or not?

Script that I am using:

Code:

#!/usr/bin/expect
spawn sftp $PCMSu@$FTP_LOC
expect "password:"
send "$PCMSp\n"
expect "sftp>"
send "cd /batchfiles/aspect/\n"
expect "sftp>"
send "put /$PCMS_OUT/qsdaily.dta\n"
expect "sftp>"
send "exit\n"
interact

Please help me how to generate failure log file using expect package (above script) to track if connection is done successfully?

Have you thought about using ssh keys instead of using expect with username password ?

Not knowing WHAT "is not working for me" we can give only very generic advice.
Why don't you use "public key authentication" and a batchfile (-b option)?

Sir, I want to know if sftp connection fails and we want to this error message in log file. How can I get this? I have tried using below script but it wouldn't work:

Code:

#!/usr/bin/expect spawn sftp $PCMSu@$FTP_LOC 2>> log_error_file expect "password:" send "$PCMSp\n" expect "sftp>" send "cd /batchfiles/aspect/\n" expect "sftp>" send "put /$PCMS_OUT/qsdaily.dta\n" expect "sftp>" send "exit\n" interact

Please share how can I check if sftp connection is done successfully or not? is there any way by using that I can check for error if connection lost or not established?

---------- Post updated at 01:19 PM ---------- Previous update was at 01:18 PM ----------

As per my understanding, a batchfile (-b option) is used to send the long file using sftp. Please correct me if I am wrong?

If you get "public key authentication" configured, you could drop expect also simply use rcp with errors redirected to the log file like this:

Code:

rcp /$PCMS_OUT/qsdaily.dta $PCMSu@$FTP_LOC:/batchfiles/aspect/ 2>> log_error_file

Hi
SSH keygen is not an option for us since we dont have access to the remote server so we're looking into using expect to provide password arg for SFTP.
Is there any way to use error redirection to check for the sftp failure error?
I checked this some links but didn't understand about expect_out(buffer).
Please anyone can share the code that send the failure of sftp to failure_log file using error redirection operator? I donot know if it is possible or not using error redirection operator ?

In what sense do you not have access to it? You can sftp to it. You don't have to use a shell to write authorized_keys, sftp may not have append but you can download, upload, move, rename, and even chmod it just fine.

Whatever their security model, they can't have intended for you to use the insecure and third-party expect brute-forcing tool. The stricter they are, the less they'll appreciate you doing so.

All your difficulties are caused by your use of expect. Once you start using sftp the way it's designed for, everything is easy.