Doesn't work: spawn cat <file> | ssh root@$ip mtd -r -e linux write

wtfman · 01-08-2010, 05:58 AM

Hi,

i'm going to write a script that flashes all AccessPoints in our network, with an expect script.

Unfortunately the following code doesn't work (:

Code:

spawn cat <file> | ssh root@$ip mtd -r -e linux write - linux

cat: invalid option -- o
Try `cat --help' for more information.

So it doesn't understand the pipe thing anymore.
Is there a way to get this command working? Thanks in Advance!

jschiwal · 01-08-2010, 06:15 AM

Does the file name start with a hyphen? If so, then use "spawn cat -- ..." instead. Also sometimes you need to put the command you want ssh to run inside quotes so that things like variables and redirections are evaluated on the remote server and not by bash on the client computer. note: unless that is what you want.

wtfman · 01-08-2010, 06:37 AM

No, filename doesn't start with a hyphen:

Code:

cat bin/openwrt-brcm-2.4-squashfs.trx | ssh -o stricthostkeychecking=no -i wrt_key root@$ip mtd -r -e linux write - linux

This is actually working, but not with spawn...

jschiwal · 01-14-2010, 09:43 AM

You may need to quote everything after the spawn command. I'm not sure how the line would be expanded in expect. It may do things differently than bash.

Another option is to move the command into a script and spawn the script instead.