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I want to use WinSCP to transfer data to my phone over wireless. I've enabled dropbear on my phone. WinSCP connects, but crashes after trying pwd. Logging in with PuTTy, I can see that pwd is returning a blank line:

/data/dropbear # pwd

/data/dropbear # which pwd
/data/dropbear # busybox pwd
/data/dropbear # ls -l /system/xbin/pwd
lrwxrwxrwx    1 root     root             7 Apr  1 23:30 pwd -> busybox

Coming from an OpenWrt background, that dropbear setup seems normal to me. Why is this shell printing blank lines? My device is a Motorola Droid running Cyanogenmod 7 RC4.

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What do you get if you just run busybox without any parameters? It looks like that's what's happening on your first line, since as you say, pwd is just a link to busybox. – Matt H Apr 3 '11 at 20:08
up vote 2 down vote accepted

Can you replace the pwd symbolic link with a script that just runs 'busybox pwd'?

Or would an alias work?

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The behavior is different because dropbear uses a different shell than the terminal app. A workaround would be to just use the same shell as the terminal app:

echo "/system/bin/sh" > /data/dropbear/.profile

Be advised that this contradicts the Cyanogenmod wiki, which instructs you to use the busybox shell: /system/xbin/busybox sh

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