How to change /opt path

[demokedes]

Dear all,
I am changing external usb storage. Consequently I have to change /opt path. What is the easiest way to achieve that?
I moved content of the old location to the new location.
The old location is not accessible anymore. If I cd /opt, I get:

admin@RT-AX88U-CD00:/jffs/scripts# cd /opt
-sh: cd: can't cd to /opt

 

[ColinTaylor]

/opt is a link to /tmp/opt. This in turn is a link to the real entware directory on the USB drive. This link is created automatically by the Entware startup process.

 

[demokedes]

Colin,
Thank you understand that. But is it possible to manually change the path? I moved the directory to another location. If I run the command from the new location it is working. Can this be done manually or do I need to reinstall entware?

 

[ColinTaylor]

If I run the command from the new location it is working.

Sorry, I don't understand what your problem is if it's working now. Everything in Entware is compiled to work from /opt therefore your new location must be soft linked to /opt. The Entware startup process usually does this, so if you've moved Entware to a different USB drive it will automatically be picked up.

If you installed Entware via amtm or Diversion the startup process will scan the USB drive when it's mounted looking for /entware*/bin/opkg. It will use this as the Entware location if it finds it.

 

[gerardr]

Not sure if this will help, but here's a script I wrote that gets activated by the nvram variable script_usbmount=path-to-script which is present in both the stock asuswrt and asuswrt-merlin. The script runs when a usb stick gets successfully mounted. To make sure that the path is available shortly after boot, I put the script, executables and libraries in /jffs. The section on handling /tmp/opt might give some hints.

#!/bin/sh
{
  echo "=== $0 == $( /bin/date ) ==="

  export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/jffs/bin
  export LD_LIBRARY_PATH=/jffs/lib:$LD_LIBRARY_PATH

  # Do an fsck just in case.
  /bin/umount /dev/sda1
  /jffs/bin/fsck.ext4 -fpv /dev/sda1

  # Since there's a fixed read-only symlink of /opt->/tmp/opt, cut
  # out the additional redirect symlink of /tmp/opt->/tmp/mnt/sda1.
  /bin/mkdir -p /tmp/opt
  /bin/mount /dev/sda1 /tmp/opt
  /sbin/swapon /dev/sda2

  # Get my basics into the root home directory.
  cd /tmp/opt/usr/
  /bin/cp -pr .config .profile .ssh .vimrc bin /root/
  cd /root/
  /bin/chmod -R og=,u+rwX .ssh

  # Start a script that creates a SOCKS5 proxy and a lighttpd
  # instance with a common home page for all my devices.
  ( /usr/bin/nohup /jffs/bin/fix_srvcs </dev/null >/dev/null 2>&1 & ) </dev/null >/dev/null 2>&1 &

  echo "=== $( /bin/date ) ==="

} >/tmp/usb_mount.log 2>&1

 

[thelonelycoder]

Dear all,
I am changing external usb storage. Consequently I have to change /opt path. What is the easiest way to achieve that?
I moved content of the old location to the new location.
The old location is not accessible anymore. If I cd /opt, I get:

admin@RT-AX88U-CD00:/jffs/scripts# cd /opt
-sh: cd: can't cd to /opt

If you use amtm or Diversion to setup Entware then the scenario is simple and works 100% of the time - unless someone tinkers with things or changes the file content that my scripts use.

amtm and Diversion start Entware services with /jffs/scripts/addons/diversion/mount-entware.div
If Diversion is installed, the file has additional content but the logic is the same:
While the routers is mounting an attached storage device, mount-entware.div will first look for /entware/bin/opkg.
amtm and Diversion create and install Entware into a folder named entware on the selected device, this is the default.
However, older scripts created a variation of that folder name like entware-ng - including my scripts a long time ago.
So, if there is no entware folder, mount-entware.div then looks for /entware*/bin/opkg and would rename it to entware if its a variation of entware*.

All actions when mount-entware.div is triggered are logged to the routers Syslog:
When Diversion is installed:

Diversion: Starting Entware and Diversion services on <device>

Without Diversion:

Entware: Starting Entware services on <device>

It also states if there are two instances of Entware found on separate devices.

So in essence, check your Syslog after a reboot to find out why your new device is not starting Entware on your router.

 

[demokedes]

I am not using Diversion, so I am not familiar with it.
During the weekend, I was testing a bit and I solved it.
I added following to lines into init-start script and it is working now.
Thank you!

/bin/mkdir -p /tmp/opt
/bin/mount /tmp/mnt/Verbatim/sdb1/entware /tmp/opt