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OTRW2 on a Cellspot (RT-AC68U)

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gatorback
DD-WRT User

Joined: 04 Feb 2007
Posts: 426
Location: Fountain of Youth

Posted: Tue Jul 28, 2015 2:32 Post subject: OTRW2 on a Cellspot (RT-AC68U)

OTRW is a marvel on the RT-N16 and now that I have upgraded my T-Mobile Cellspot with "DD-WRT v3.0-r27413 (06/22/15) std", I am looking forward to installing OTRW2 on this powerful new hardware.

Attempts to follow the OTRW2 Wiki are documented here:

Code:

root@ECHO:/opt# wget -O /tmp/prep_optware http://dd-ware.googlecode.com/svn/otrw
2/prep_optware
Connecting to dd-ware.googlecode.com (74.125.21.82:80)
prep_optware 100% |*******************************| 3054 0:00:00 ETA
root@ECHO:/opt# sh /tmp/prep_optware
Connecting to dd-ware.googlecode.com (74.125.21.82:80)
prep 100% |*******************************| 15825 0:00:00 ETA

Opkg is not installed... Let's install it

Connecting to dd-ware.googlecode.com (74.125.21.82:80)
- 100% |*******************************| 366 0:00:00 ETA
Connecting to dd-ware.googlecode.com (74.125.21.82:80)
opkg 100% |*******************************| 123k 0:00:00 ETA
Connecting to dd-ware.googlecode.com (74.125.21.82:80)
opkg.conf 100% |*******************************| 146 0:00:00 ETA
sh: /opt/bin/opkg: Permission denied

######

Opkg installation was NOT successful...
Your hardware is probably not compatible
model name : ARMv7 Processor rev 0 (v7l)
processor : 0
BogoMIPS : 1594.16
Features : swp half thumb fastmult edsp tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc09
CPU revision : 0

model name : ARMv7 Processor rev 0 (v7l)
processor : 1
BogoMIPS : 1594.16
Features : swp half thumb fastmult edsp tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc09
CPU revision : 0

Hardware : Northstar Prototype
Revision : 0000

I have been able to read/write to a ext2 USB memory stick mounted at /opt. I noticed this line in the log above:

sh: /opt/bin/opkg: Permission denied

Inspection revealed:

Code:

root@ECHO:/opt/install# ls -l /opt/bin/
-rwxr-xr-x 1 root root 125960 Jul 27 19:10 opkg

root@ECHO:/opt/install# ls -l /opt | grep bin
drwxr-xr-x 2 root root 4096 Jul 27 19:10 bin
drwxr-xr-x 2 root root 4096 Jul 27 19:10 sbin

Note that opkg.conf was not copied /opt/bin

I am hoping that someone can comment on why permission was denied. Hopefully this data point can improve the script:

Code:

wget http://dd-ware.googlecode.com/svn/otrw2/prep_k3_dd-ware -O ./ /opt/install

I think this portion of the script threw the error:

Code:

################################
## Install libc & opkg
################################

opkg print-architecture >/dev/null 2>&1

if [ ${?} -eq 0 ] ; then
echo -e "You already installed opkg!"
if [ -f /opt/etc/release ] ; then
   echo -e "Checking the installed revision...".
   wget http://"${dom}"/ -qO - | grep Rev | tail -n1 | awk {' print $4 '} | cut -d: -f1 > /tmp/release
   cur_version=`cat /tmp/release`
   my_version=`cat /opt/etc/release`
   if [ "$my_version" -ge "$cur_version" ] ; then
      echo -e "No changes have been made to the scripts since your last install/update\n"
      while true ; do
         read -p "Continue install? (Yes|No) " yn
         case $yn in
            [Yy]* ) echo -e "Continuing upgrade" ; break ;;
            [Nn]* ) echo "Exiting...." ; exit;;
            * ) echo "Please answer yes or no.";;
         esac
      done
   else
      echo -e "Upgrades available!\nI will execute an update\n"
   fi
   rm /tmp/release
else
   echo -e "I will execute an update\n"
fi
else
echo -e "\nOpkg is not installed... Let's install it\n"

wget http://dd-ware.googlecode.com/svn/install/install.sh -O - | sh

opkg update 2>/dev/null
if [ $? -ne 0 ] ; then
   echo -e "\n######\n\nOpkg installation was NOT successful...\nYour hardware is probably not compatible"
   cat /proc/cpuinfo
   exit 1
fi
opkg_install opkg 2> /dev/null
fi

Hopefully someone with more experience can pose some questions to diagnose the issue.

UPDATE: I now understand that the Firmware is a Brainslayer build and not a Kong build. I think this implies that FPU emulation is absent and is problematic for OTRW2. Any test to test / confirm that the FPU emulation is absent?
_________________
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Magnetron1.1
DD-WRT User

Joined: 21 Nov 2010
Posts: 278
Location: North America

Posted: Wed Jul 29, 2015 15:40 Post subject: Re: OTRW2 on a Cellspot (RT-AC68U)

gatorback wrote:

sh: /opt/bin/opkg: Permission denied

######

Opkg installation was NOT successful...
Your hardware is probably not compatible
model name : ARMv7 Processor rev 0 (v7l)
processor : 0
BogoMIPS : 1594.16
Features : swp half thumb fastmult edsp tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc09
CPU revision : 0

model name : ARMv7 Processor rev 0 (v7l)
processor : 1
BogoMIPS : 1594.16
Features : swp half thumb fastmult edsp tls
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc09
CPU revision : 0

Hardware : Northstar Prototype
Revision : 0000[/code]

I have been able to read/write to a ext2 USB memory stick mounted at /opt. I noticed this line in the log above:

sh: /opt/bin/opkg: Permission denied

The cause of the problem is staring you in the face. Optware runs on MIPS processors not ARMv.7 processors. There are usually 2 errors that occur when executing incompatible code : 1.) "Permission denied" eventhough execute permissions are clearly set, and 2.) "Not found" eventhough the file clearly exists and you have expliciitly used the full path name to it.

To solve the problem, switch to Entware which is an Optware work-alike. To get started with installing a version that is compatible with ARMv.7, follow the instructions here: http://www.dd-wrt.com/phpBB2/viewtopic.php?t=284490

- Magnetron1.1

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