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Redirect output from sFTP

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# 1  
Old 03-31-2006
Redirect output from sFTP
Hey all,

I have a ksh script which used ftp to transfter certain files to a AIX server, however, now I have to switch to sFTP and I have the following problem. Originally,

output=`ftp -nv $AIX_HOST << EOF 2>&1
user $AIX_USER $AIX_PASSWORD
cd /hsbc/risdev/risdevhfi/app/ftp/incoming
put "$filename"
quit
EOF`

Now, I am using sFTP I don't know if I can do something like this

output=sftp -B $BATCHFILE $AIX_USER@$AIX_HOST

If not, what am I suppose to do to get the output from the sFTP? thanks!

Later,
Pang
# 2  
Old 04-02-2006
Read the sftp man page - the -B option is for buffer, not batch. You would need the lowercase -b option for the batchfile.
# 3  
Old 04-03-2006
Hi
Try this
sftp $SFTP_USER@$SFTP_HOST yes <<-!
lcd $DATA_DIR
cd $SFTP_REMOTE_DIR
put $REPORT
quit
!

Remember for Sftp we cant suppply password as part of acript.So you need to generate a passowrd less key and get the public key and put that public key in $HOME/.ssh/known_hosts file or similar file under .ssh directory in your home directory. The passwordless key can be genarted using ssh-key gen program.

Hope this helps.
# 4  
Old 04-03-2006
reddymails, would you please explain what this "<<-!" means?

I am new with scripting so I know very little and if you don't mind me asking what is the difference between "<<" and "<", I see people use them quite often. Thanks!
# 5  
Old 04-03-2006
mpang_, the <<-! that reddymails has used is exactly the same as the <<EOF that was in use in your script before.

The use of the '<<' operator is explained in the man page of ksh:
Quote:
<<[-]word
The shell input is read up to a line that matches word, or to an end-of-file. No parameter substitution, command substitution, or file name generation is performed on word. The resulting document, called a here-document, becomes the standard input. If any character of word is quoted, no interpretation is placed upon the characters of the document. Otherwise, parameter and command substitution occurs, \new-line is ignored, and \ must be used to quote the characters \, $, `, and the first character of word. If - is appended to <<, all leading tabs are stripped from word and from the document.
In case that is confusing, the basic gist is that using the <<, you can pre-provide input to the shell till the word that immediately follows the '<<' is again encountered. The shell will then execute the input line by line just like a script.
# 6  
Old 04-03-2006
So...does it mean

sftp $SFTP_USER@$SFTP_HOST yes <<-! 2>&1

will provide the output that I need?

"<<-!" or "<<EOF" read the output until end of file and then ">" redirect that output to where I want? thanks guys!
# 7  
Old 04-03-2006
You've almost got it. Just that in your statement
Quote:
and then ">" redirect that output to where I want?
the std output is not redirected anywhere. The stderr is, however, redirected to the output.

Also, the 'read the output till end of file' should be 'read the input till the end of file'.
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