09-12-2005
Automating SFTP with Expect
Hello all,
I've written an automated SFTP script to work with the Expect command. It recently occurred to me however, that if the client side box does not have the known host entry for the server, it will not work correctly. So I have added an expect for the known host prompt, and that part works correctly, however, it does not seem to continue past that point to enter the password successfully if the known host file has already been configured for that particular server. I'm assuming I need some sort of timeout for the expect of the known hosts warning, or an if of sorts. I'm not sure how to go about this with expect though. Any help would be great.
Below is my script:
#!/usr/bin/expect
set SYSTEM [lindex $argv 0]
set USER [lindex $argv 1]
set PASSWORD [lindex $argv 2]
set AUTOHOME "/etc/scripts/automation"
set TRIGDIR "/etc/scripts/automation/.engine_triggers"
set CTRIGDIR "/etc/scripts/automation/.client_triggers"
spawn /usr/bin/sftp $USER@$SYSTEM
expect "Are you sure you want to continue connecting (yes/no)?"
send "yes \r"
expect "password:"
send "$PASSWORD \r"
expect "sftp> "
send "put $CTRIGDIR/command $TRIGDIR \r"
expect "sftp> "
send "bye \r"
exit 0
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LEARN ABOUT OPENDARWIN
sftp-server
sftp-server(1M) System Administration Commands sftp-server(1M)
NAME
sftp-server - SFTP server subsystem
SYNOPSIS
/usr/lib/ssh/sftp-server
DESCRIPTION
sftp-server implements the server side of the SSH File Transfer Protocol as defined in the IETF draft-ietf-secsh-filexfer.
sftp-server is a subsystem for sshd(1M) and must not be run directly. There are no options or config settings.
To enable the sftp-server subsystem for sshd add the following to /etc/ssh/sshd_config:
Subsystem sftp /usr/lib/ssh/sftp-server
See sshd_config(4) for a description of the format and contents of that file.
There is no relationship between the protocol used by sftp-server and the FTP protocol (RFC 959) provided by in.ftpd.
EXIT STATUS
The following exit values are returned:
0 Successful completion.
>0 An error occurred.
FILES
/usr/lib/sftp-server
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWsshdu |
+-----------------------------+-----------------------------+
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO
sftp(1), ssh(1), ssh-add(1), ssh-keygen(1), sshd(1M), sshd_config(4), attributes(5)
To view license terms, attribution, and copyright for OpenSSH, the default path is /var/sadm/pkg/SUNWsshdr/install/copyright. If the
Solaris operating environment has been installed anywhere other than the default, modify the given path to access the file at the installed
location.
AUTHOR
Markus Friedl
SunOS 5.10 30 Jul 2003 sftp-server(1M)