Fixing SamyGO telnet/SSH/SCP/bash on C/D/E/F series

[sectroyer]

THIS PART IS ONLY FOR C!!!!!!
FOR OTHER MODELS CHECK OTHER POSTS !!!!!!
I wanted to make as little changes to original SamyGO files as possible. Therefore (whenever it was possible) I have put most of my code in seperate files (rcEXT, rc.fix_telnetd, etc.). However probably it could be simplified and integrated directly with existing files (/dtv/.ashrc or /dtv/SGO.env). In order to make telnet working correctly (full bash history across reconnects and restarts, no more need to type . /dtv/SGO.env to have everything set up). You have to create following files:

$SYSROOT/rcEXT:

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#!/bin/sh

source /dtv/SGO.env

#echo "alias sgopwd='cd $1'" >> /dtv/SGO.env

echo "#!/dtv/network_opt/sh" > /dtv/sgoshfix
echo ". /dtv/SGO.env" >> /dtv/sgoshfix
echo "export HOME=\"$1\"" >> /dtv/sgoshfix
echo "export TERMINFO='$1/etc/terminfo'" >> /dtv/sgoshfix
echo "export TERM='xterm-color'" >> /dtv/sgoshfix
echo "export FRAMEBUFFER='/dev/sam/fb0'" >> /dtv/sgoshfix
echo "export LD_LIBRARY_PATH=\"$LD_LIBRARY_PATH\"" >> /dtv/sgoshfix
echo "export PATH=\"$PATH\"" >> /dtv/sgoshfix
echo "export SYSROOT=\"$SYSROOT\"" >> /dtv/sgoshfix
echo "export PS1='\u@tv:\w \\$ '" >> /dtv/sgoshfix

chmod +x /dtv/sgoshfix

ln -s "$SYSROOT/opt/privateer/usr/bin/" /dtv/bin

$1/etc/rc.fix_telnetd&

$SYSROOT/etc/rc.fix_telnetd:

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#!/bin/sh
killall telnetd
. /dtv/sgoshfix
cd
telnetd -l /dtv/network_opt/sh

In some cases you may have to run:

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chmod +x $SYSROOT/rcEXT
chmod +x $SYSROOT/etc/rc.fix_telnetd

Finally add to the end of $SYSROOT/rcSGO this single line:

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$1/rcEXT "$1"

After this you will have "fixed" telnet working. In order to "fix" SSH you just have to change the file $SYSROOT/etc/rc.sysinit. Locate the line:

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echo "export PS1='# '" >> /mtd_rwarea/profile

Comment it out and put bellow these lines:

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echo "PS1='\u@tv:\w \# '" >> /mtd_rwarea/profile
echo -e "ENV=/dtv/.ashrc\nexport ENV\n" >> /mtd_rwarea/profile
echo ". /dtv/sgoshfix" >> /mtd_rwarea/profile
 
mount -o bind /dtv/network_opt/sh /bin/sh 

Now both telnet and SSH have colors, full bash history across reconnects/reboots and always start a shell in $SYSROOT directory.

To get SCP working we just need to copy patched dropbear binary (attached in archive) to:

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$SYSROOT/opt/privateer/usr/sbin/dropbear

and scp static binary to:

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/opt/privateer/usr/bin/scp

[juusso]

will check on D series (but need to adapt pathes first). Would be great to get reports from some other C series testers too.

[sectroyer]

FOR E SERIES YOU HAVE TO DO THIS!!!!!!

You have to use dropbearmulti from archive attached in this post to get scp working for telnet and SSH it is enough to locate in /mnt/etc/rc.sysinit these lines:

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echo "export PS1='# '" >> /mtd_rwarea/profile
echo -e "ENV=/dtv/.ashrc\nexport ENV\n" >> /mtd_rwarea/profile

And change it to:

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echo "PS1='root@tv:\w \$ '" >> /mtd_rwarea/profile
echo -e "ENV=/dtv/.ashrc\nexport ENV\n" >> /mtd_rwarea/profile

ln -s /mnt/bin/ /dtv/bin

Than I have modified ./etc/init.d/01_01_catch_crap.init. I fixed the line with wrong path to mount.ko and added three more. Now it looks like this:

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    [ -e $MOD_DIR/kernel/drivers/pty/mount.ko ] && insmod $MOD_DIR/kernel/drivers/pty/mount.ko || echo "mount.ko not found."

    /bin/mount -o bind /mtd_rwarea/passwd /etc/passwd
    /bin/mount -o bind /mtd_rwarea/profile /etc/profile
    /bin/mount -o bind /mnt/bin/sh /bin/sh

Finally fix for telnetd (the same file) :

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    export HOME=/mnt/
    export PS1='root@tv:\w \$ '
    $SYSROOT/bin/busybox2 telnetd  -l /mnt/bin/sh

We need to change /bin/sh to /mnt/bin/sh (although at this moment it doesn't matter since we already mount-binded it ) and set up HOME and PS1 variables.

For scp we also needto change dropbearmulti to the one from the archive. Then we just make a symbolic link to dbclient:

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ln -s /mnt/opt/privateer/usr/sbin/dropbearmulti /mnt/bin/dbclient
ln -s /mnt/opt/privateer/usr/sbin/dropbearmulti /mnt/bin/scp
ln -s /mnt/opt/privateer/usr/sbin/dropbearmulti /mnt/opt/privateer/usr/sbin/dropbear

After this I have working bash history, telnet, ssh and scp

EDIT: Attached my /mnt/bin/busybox and dropbearmulti binaries.

FOR F SERIES YOU HAVE TO DO THIS!!!!!!

You have to use dropbearmulti from archive attached in this post to get scp working for telnet and SSH.

Upload and replace /mnt/opt/privateer/usr/sbin/dropbearmulti with the attached file.

Locate these lines in /mnt/etc/init.d/01_02_telnet.init :

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$SYSROOT/bin/busybox2 telnetd -p 23 -l $SYSROOT/bin/ash &  >> $LOGFILE 2>&1

Replace the line with this:

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	echo "export PS1='root@tv:\w \$ '" >> /mtd_rwarea/profile
	echo -e "ENV=/dtv/.ashrc\nexport ENV\n" >> /mtd_rwarea/profile
	echo "PS1='root@tv:\w \$ '" >> /mtd_rwarea/profile
	echo -e "ENV=/dtv/.ashrc\nexport ENV\n" >> /mtd_rwarea/profile
	/bin/mount -o bind "$SYSROOT/bin/sh" /bin/sh
	export HOME=/mnt/
	export PS1='root@tv:\w \$ '
	$SYSROOT/bin/busybox2 telnetd -p 23 -l $SYSROOT/bin/sh &  >> $LOGFILE 2>&1

In the same file find this part:

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        if [ ! -e /mtd_rwarea/passwd ]; then
                echo "root:saJvQKUdIxRW2:0:0:SamyGO secured Root:$NEW_HOME:$SYSROOT/bin/ash" > /mtd_rwarea/passwd
        fi

Replace it with this:

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	ln -s /mnt/bin/ /dtv/bin
		if [ ! -e /mtd_rwarea/passwd ]; then
                echo "root:saJvQKUdIxRW2:0:0:SamyGO secured Root:$HOME:/bin/sh" > /mtd_rwarea/passwd
        fi

Then run this commands:

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umount /mtd_rwarea/passwd
rm /mtd_rwarea/passwd

Execute the listed commands through telnet connection.

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chmod +x /mnt/opt/privateer/usr/sbin/dropbearmulti
rm /mnt/opt/privateer/usr/sbin/dropbear
ln -s /mnt/opt/privateer/usr/sbin/dropbearmulti /mnt/bin/dbclient
ln -s /mnt/opt/privateer/usr/sbin/dropbearmulti /mnt/bin/scp
ln -s /mnt/opt/privateer/usr/sbin/dropbearmulti /mnt/opt/privateer/usr/sbin/dropbear

Reboot your TV and after that you will have fixed telnet and working ssh access with scp and ssh history.
Default ssh user is root and the password is SamyGO

Credits to sectroyer.

[juusso]

after that fixes i could access tv via WinSCP
just keep in mind, SYSROOT on D series is ...

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echo $SYSROOT
/mtd_rwcommon/widgets/user/SamyGO/SamyGO

yeah, i know, better don`t mix testing different series in one topic, but i`m sure your fix will work on C/D/E/F (D/E/F are based on B/C Extensions scripts and changes were made just in matter of specific of each series).

[sectroyer]

after that fixes i could access tv via WinSCP
just keep in mind, SYSROOT on D series is ...

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echo $SYSROOT
/mtd_rwcommon/widgets/user/SamyGO/SamyGO

yeah, i know, better don`t mix testing different series in one topic, but i`m sure your fix will work on C/D/E/F (D/E/F are based on B/C Extensions scripts and changes were made just in matter of specific of each series).

If you got it working on D then we have all (besides F which probably is the same as E) series working Denny already uploaded my patch to C http://download.samygo.tv/C%20Series/Fo ... sh_mod.tgz. ATM I think it's better to prepare fixes (with defails of all changes) to every series separety. The patch are different ETC. Also do you have bash history (across reconnects/restarts) and color in both telnet and SSH ?:)

[juusso]

yes, i saw these files on server, they slightly differ from files you`ve attached here

I haven`t succeed to merge your full patch with my Extensions, somewhere i still make mistakes. As result - still no benefits you mentioned. Yet.

We could merge all for each series, so no need to distribute separate fixes. Just re-install whole widget.

[sectroyer]

yes, i saw these files on server, they slightly differ from files you`ve attached here

I haven`t succeed to merge your full patch with my Extensions, somewhere i still make mistakes. As result - still no benefits you mentioned. Yet.

We could merge all for each series, so no need to distribute separate fixes. Just re-install whole widget.

I don't like reinstalling everything Anyway I don't know much about D series Extension but it shouldn't be much different. Since you already have SCP working than now it should just be a matter of launching telnet with different "sh". I have unpacked the D Extensions from the website so they probably differ a little but it looks that you have busybox in /SamyGO/bin/busybox so just make a smiling to it in /SamyGO/bin/sh, then relaunch telnetd with this shell

[sectroyer]

How is the progress ? When D becomes stable I think it's good point to release full C/D/E support. C/E is very stable ATM

[zoelechat]

I've done every step and everything works as expected (colors, SCP...)
Just had a strange problem: rcEXT couldn't be executed, neither by rcSGO nor manually (of course it was present and chmodded +x )

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root@tv:/mnt # ./rcEXT
/mnt/bin/sh: ./rcEXT: not found

So /dtv/sgoshfix was never created and ssh gave an error on open because it was unable to find the file.
I've just included rcEXT code at the end of rcSGO and the problem is gone...

I also need to launch dropbear manually to have ssh/SCP/port 22 opened, where should I include it to be safely executed? Somewhere in catch_crap.init I presume?

[sectroyer]

I've done every step and everything works as expected (colors, SCP...)
Just had a strange problem: rcEXT couldn't be executed, neither by rcSGO nor manually (of course it was present and chmodded +x )

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root@tv:/mnt # ./rcEXT
/mnt/bin/sh: ./rcEXT: not found

So /dtv/sgoshfix was never created and ssh gave an error on open because it was unable to find the file.
I've just included rcEXT code at the end of rcSGO and the problem is gone...

I also need to launch dropbear manually to have ssh/SCP/port 22 opened, where should I include it to be safely executed? Somewhere in catch_crap.init I presume?

On which TV model were you testing it?