FTP script to multiple hosts
 

Hello,

I am trying to automate ftp to multiple hosts. I know how to write an ftp script for the ftp session, but I cannot seem to pass a variable to ftp or open for a consecutive list of hosts. Below is what I am working with:

for x in `cat list` # Where list is a file with all the host names I need to ftp to, eg. host1, host2, hostn...
do
echo $x
ftp -inv < script
done

That is simple enough. Here is my 'script'

open $x # This is where I seem to have a problem
user username password
bin
cd /dir/
put filename
bye

If I put in an actual hostname after open then it works for that host, but I do I pass a variable to this command so I can send a file out to a multitude of hosts? Thanks for your help.

telamonides

What happens if you use a .netrc for the credentials
and just go
ftp $x
?

Or, better yet, use ssh/scp and passwordless authentication ;}


Cheers,
Tink

ftp $x does not work (open is the same thing. The authentication is not the problem because if I actually put a single host in the $x spot it works. What I need to put this file on several hundred machines and want to ftp to a variable host. Thanks for the reply.

telamonides

I don't think it wouldn't be QUITE the same as open
because for the open you have already handed over control
to ftp .... Did you actually try it?

And as for the single host works: do your hosts come one
per line or all on one line?


Cheers,
Tink

If I do it ftp $x or open $x (open is an alias for ftp according to man and I have seen it in mulitple scripts) I get an ftp error that states: Name or service not known. According man ftp interprets a $ as a macro. I just want to know if it is possible to pass a variable to ftp in bash. It may not be, but it would be nice to know for sure so that I can look for some other method. Thanks.

telamonides

What distro are you using? I've never seen anyone refer to
open being an alias for ftp.

And this is where my suggestion comes in. If you use
ftp $variable the variable will be expanded BEFORE ftp
is run. And if you put the credentials and the commands
into your .netrc you're sweet.

The other approach would be to use expect instead, but
I think my suggestion is easier (and in this case probably
more elegant, too). What you need to understand is that
as soon as you pass control to the ftp process shell variables
aren't working any more.

Another approach would be to echo the whole sequence of your
commands to ftp, but again, I think that .netrc is more elegant.



Cheers,
Tink

I figured out my problem. The file I was reading from with all the host names was copied from a windows box over to linux and apparently had all the character info in it causing ftp to try a non-existent hostname. I regenerated the file on linux and ftp $x works fine. Thanks for trying to help.


telamonides