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Full Discussion: Use cURL in shell script and get most recent file from remote server using SFTP
Top Forums Shell Programming and Scripting Use cURL in shell script and get most recent file from remote server using SFTP Post 302347091 by KenJackson on Monday 24th of August 2009 10:49:54 PM
Old 08-24-2009
Maybe something like this:
Code:
#!/bin/sh
SERVER=example.com
DIR=some_directory
FILE="$(echo ls -t | sftp -b- $SERVER:$DIR | head -n1)"
echo get "$FILE" | sftp -b- $SERVER:$DIR

These individual commands worked for me with no username or password because I have SSH setup to the server. If you don't, I assume you'll have to add user@. I'm not sure how the password is passed.

Command ls -t lists the files in time order, so the most recent file is first. Note that if there are subdirectories that might be modified, one could end up as more recent than any file, which isn't what you want.

Switch -b- tells sftp to work in batch mode and accept commands from stdin, which is the ls command we just piped to it.

Command head -n1 runs on the local machine to catch just the name of the first file.

The syntax FILE="$(...)" runs a command on the local machine and captures the output into a variable named FILE.

Even if the server really doesn't allow ssh, you may still be able to setup SSH keys so that sftp works without a password. It's secure because you can only access it if you log into your local machine.
 

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LEARN ABOUT PHP

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)
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