Continuation character for sftp commands using DTLSPAWN

[LeonBylsma]

In FTP we could use a '+' as continuation character on the 80 byte long input record when doing commands such as put/get/rename etc. What is the equivalent for SFTP (DTLSPAWN)?

[dovetail]

DTLSPAWN (now called COZBATCH) runs a z/OS Unix shell in a batch job and uses the standard shell continuation character which is back-slash "\"

[LeonBylsma]

thank you ... worked fine

[DClassic53]

Problem with using the back slash as a continuation character

- Worked on the ls command

- Did not work as expected on the put command


JCL submitted:
//SFTPRUN1 EXEC COZBATCH,COND=(4,LT)
//STDIN DD *
- - - - - - - - - - - - - -
export SFTP_ZOS_OPTIONS="nosmf"
#ssh_opts="-oBatchMode=no"
ls /u/magee/\
.ssh
cozsftp $ssh_opts -b- $tgtuser@$tgthost
put //MAGEE.SEQ.ERRLIST\
//MAGEE.SEQ.ERRLIST1 <== Note: there are actually 4 blanks at the beginning of this record
quit

Output:
authorized_keys
id_rsa
id_rsa.pub
known_hosts
cozsftp> put //MAGEE.SEQ.ERRLIST\
Uploading //MAGEE.SEQ.ERRLIST to /u/magee/MAGEE.SEQ.ERRLIST
cozsftp> //MAGEE.SEQ.ERRLIST1
Co:Z SFTP version: 1.8.0 (5.0p1) 2011-02-03
Copyright (C) Dovetailed Technologies, LLC. 2008. All rights reserved.
ZosDataset: Opening dataset MAGEE.SEQ.ERRLIST for read with options: shr
ZosDataset: Closing dataset //MAGEE.SEQ.ERRLIST - 17 records read, 1085 bytes
[88.747] Invalid command.

Is this corrected in a later release ??

[dovetail]

The back slash is a *shell* continuation character. So, if you have a shell script (running under /bin/sh via COZBATCH), the backslash will work as a continuation character.

The problem with your example is that you have this:

Code: Select all

cozsftp $ssh_opts -b- $tgtuser@$tgthost 
put //MAGEE.SEQ.ERRLIST\ 
//MAGEE.SEQ.ERRLIST1 <== Note: there are actually 4 blanks at the beginning of this record 
quit 

When you do this and run the cozsftp command, it is doing the I/O from stdin and reading the next three lines (up until quit tells it to stop). The cozsftp command (like most Unix commands) do not provide their own continuation line support, which is why it doesn't work.

The solution to this is to put the input commands to the cozsftp command in a "here document", like this:

Code: Select all

cozsftp $ssh_opts -b- $tgtuser@$tgthost <<EOB
put //MAGEE.SEQ.ERRLIST\ 
//MAGEE.SEQ.ERRLIST1 <== Note: there are actually 4 blanks at the beginning of this record 
quit
EOB 

This is how our samples are done. With a shell "here document", the input up to EOB is read by the shell and therefore it will process variable substitutions and line continuations.

[DClassic53]

We are seeing a problem with an existing sftp server that now seems to want the target acct name to include the domain name in the format
domain\user-acct

Setting $tgtuser=domain\acct with that back slash character fails.

Is there a solution to this coding when using COZBAZTCH?

[dovetail]

The input to COZBATCH is a z/OS Unix shell script, so you have to watch out for shell meta-characters like '\' and following normal shell quoting rules.

It would be helpful if you could post an example of the input that you are having trouble with, so that we can be specific about suggesting how to quote it to avoid the backslash meta character.

[DClassic53]

I think my problem is with the back slash in the tgtuser variable below:

//SFTPRUN1 EXEC COZBATCH,COND=(4,LT)
//STDIN DD *
#PATH=/usr/lpp/coz/bin:$PATH
tgtuser=dds\riskftp
tgthost=my.sftp.server
- - - - - - - - - - - - - - - - - - 14 Line(s) not Display
#
cozsftp $ssh_opts -b- $tgtuser@$tgthost <<EOB
zopts mode=binary,lrecl=1024,recfm=fb,blksize=6144,space=cyl.800.400
put //MAGEE.SEQ.LONG.DATA.SET.NAME.FILE\
my.file.on.the.target.system
quit
EOB

[dovetail]

Right, in order for the backslash to no be treated as a shell meta character, you would need to quote it:

Code: Select all

tgtuser='dds\riskftp' 

[Geoffrey Fowler]

In FTP we could use a '+' as continuation character on the 80 byte long input record when doing commands such as put/get/rename etc. What is the equivalent for SFTP e cig (DTLSPAWN)?

I forgot those command. How can i get them back?