File transfered via SFTP - linux

Question

I have a Linux (openSUSE 10.X) box and have a SFTP service on it.
When someone puts a file I have to write a script to move the files to another dir. I do not want to write a cron job. Is there an event or something I can check to see if they have sent the file?

Answer 1

You can write a c application and hook into inotify events.

Answer 2

Check also Net::SFTP::Server, an SFTP server written in Perl that can be extended to do things like the one you need.
Some code:
#!/usr/bin/perl
use strict;
use warnings;
use File::Basename ();
my $server = Server->new(timeout => 15);
$server->run;
exit(0);
package Server;
use Net::SFTP::Server::Constants qw(SSH_FXF_WRITE);
use parent 'Net::SFTP::Server::FS';
sub handle_command_open_v3 {
my ($self, $id, $path, $flags, $attrs) = #_;
my $writable = $flags & SSH_FXF_WRITE;
my $pflags = $self->sftp_open_flags_to_sysopen($flags);
my $perms = $attrs->{mode};
my $old_umask;
if (defined $perms) {
$old_umask = umask $perms;
}
else {
$perms = 0666;
}
my $fh;
unless (sysopen $fh, $path, $pflags, $perms) {
$self->push_status_errno_response($id);
umask $old_umask if defined $old_umask;
return;
}
umask $old_umask if defined $old_umask;
if ($writable) {
Net::SFTP::Server::FS::_set_attrs($path, $attrs)
or $self->send_status_errno_response($id);
}
my $hid = $self->save_file_handler($fh, $flags, $perms, $path);
$self->push_handle_response($id, $hid);
}
sub handle_command_close_v3 {
my $self = shift;
my ($id, $hid) = #_;
my ($type, $fh, $flags, $perms, $path) = $self->get_handler($hid);
$self->SUPER::handle_command_close_v3(#_);
if ($type eq 'file' and $flags & SSH_FXF_WRITE) {
my $name = File::Basename::basename($path);
rename $path, "/tmp/$name";
}
}
Save the script to somewhere in your server, chmod 755 $it, and configure OpenSSH to use it as the SFTP server instead of the default one.