[clug] Desktop commandline & remote embedded device

[Eyal Lebedinsky]

On 15/11/14 23:11, Bryan Kilgallin wrote:
> G'day, Eyal:
>
>>
>>
>> On 15/11/14 18:27, Bryan Kilgallin wrote:
>>> My Openmoko phone has restricted busybox Linux software. Whereas my desktop PC has a much larger suite of commandline programs.
>>> I wanted to use the Desktop PC's commandline programs to interrogate the phone. But I didn't know how to tell the former to look at the latter, which ws connected via SSH.
>>>
>>> Specifically I tried using lscpu. The error message told me that it was looking for /proc/cpuinfo. So I used the phone to vi that file.
>>>
>>> The commandline connection method is as follows.
>>> ssh root at 192.168.0.202
>>>
>>> How can I instruct my PC's commandline programs (lscpu in the above example) to query the phone instead of the PC?
>>
>> You cannot do this. Once you ssh to your phone you can only use executables provided there.
>> Your original system (the PC) runs the ssh client which does nothing more that move
>> characters to, and from the ssh server on the phone.
>
> Using the Nautilus GUI file manager, I opened an sftp window to the phone. Thereby I used Text Editor to read the phone's /proc/cpuinfo file.
> That listed as follows, which was the information that I had earlier sought via the lscpu commandline program.
>
> Processor    : ARM920T rev 0 (v4l)
> BogoMIPS    : 199.47
> Features    : swp half thumb
> CPU implementer    : 0x41
> CPU architecture: 4T
> CPU variant    : 0x1
> CPU part    : 0x920
> CPU revision    : 0
> Cache type    : write-back
> Cache clean    : cp15 c7 ops
> Cache lockdown    : format A
> Cache format    : Harvard
> I size        : 16384
> I assoc        : 64
> I line length    : 32
> I sets        : 8
> D size        : 16384
> D assoc        : 64
> D line length    : 32
> D sets        : 8
>
> Hardware    : GTA02
> Revision    : 0360
> Serial        : 0000000000000000

So lscpu fails but you do have /proc/cpuinfo. This is sad, lscpu should not do that.
And this should also work in your ssh window [cat /proc/cpuinfo].

>> This is different than querying a file system (e.g. a disk over USB, nfs, smb etc.), where
>> once you mount it in your system you can use your native commands to access it.
>
> Steve suggested sshfs, which I have installed and fumblingly attempted to use. It seems to be about mounting a filesystem.
>
> {This is a filesystem client based on the SSH File Transfer Protocol.}
> http://fuse.sourceforge.net/sshfs.html

-- 
Eyal Lebedinsky (eyal at eyal.emu.id.au)