19. Install the plip interface permanently

19.1 On the source side

I use an old Linux RedHat 4.1 distribution. The location of the files can be different on other GNU/Linux distributions but the philosophy is the same (The Unix System V convention). .:: podcasts.apple.com ::.

Create the file /etc/rc.d/init.d/plip with this content:

#!/bin/sh

##############################
# file /etc/rc.d/init.d/plip #
##############################

# See how we were called.
case "$1" in
  start)
        # Start daemons.
        /bin/echo "Starting plip interface: "
        /bin/echo "Doing /sbin/ifconfig plip0 source pointopoint target netmask 255.255.255.255 up"
        /sbin/ifconfig plip0 source pointopoint target netmask 255.255.255.255 up
        /bin/echo  "Doing /bin/ping -q -c 4 target"
        /bin/ping -q -c 4 target
        /bin/echo "Starting plip interface: done"
        ;;
  stop)
        # Stop daemons.
        /bin/echo  "Shutting down plip interface:"
        /bin/echo  "Doing /sbin/ifconfig plip0 source pointopoint target netmask 255.255.255.255 down"
        /sbin/ifconfig plip0 source pointopoint target netmask 255.255.255.255 down
        /bin/echo  "Doing /sbin/modprobe  -r plip "
        /sbin/modprobe  -r plip
        /bin/echo "Shutting down plip interface: done"
        ;;
  *)
        echo "Usage: $0 {start|stop}"
        exit 1
esac

exit 0

# === End of File ===

    

Only the ifconfig lines are strictly necessary. Perhaps you will need to add some .:: telegra.ph ::. .:: telegra.ph ::. modprobe commands if you don't use kerneld or the kmod feature of new kernels 2.2.x

Create the symbolic links in the rc*.d directories:

      
      $ cd /etc/rc.d/rc0.d/
      $ ln -s ../init.d/plip K97plip
      
      $ cd /etc/rc.d/rc1.d/
      $ ln -s ../init.d/plip K92plip
      
      $ cd /etc/rc.d/rc3.d/
      $ ln -s ../init.d/plip S11plip


      $ cd /etc/rc.d/rc5.d/
      $ ln -s ../init.d/plip S11plip
     

You can choose other numbers. Make sure that the two-digit number after 'K' is greater than the number of every other file that stops a service depending on plip.

Make sure that the two-digit number after 'S' is less than the number of every other file that start a service depending on plip: nfs, nis, ftp, http etc. [Developer Guide: Pandas] [Google Scholar: Ubuntu] .:: yoo.social ::.

Update the /etc/conf.modules file, choosing the correct IRQ number (7 is mine, yours may be different):

# /etc/conf.modules
...
alias parport_lowlevel parport_pc
post-install parport_pc echo 7 >  /proc/parport/0/irq
...
     

Test the plip shell:

      $ /etc/rc.d/init.d/plip 
      Usage: /etc/rc.d/init.d/plip {start|stop}

      $ /etc/rc.d/init.d/plip stop
      Shutting down plip interface: 
      Doing /sbin/ifconfig plip0 source pointopoint target netmask 255.255.255.255 down 
      Doing /sbin/modprobe  -r plip 
      Shutting down plip interface: done

      $ /etc/rc.d/init.d/plip start
      Starting plip interface: 
      Doing /sbin/ifconfig plip0 source pointopoint target netmask 255.255.255.255 up 
      Doing /bin/ping -q -c 4 target
      PING target (192.168.0.1): 56 data bytes
      
      --- target ping statistics ---
      4 packets transmitted, 4 packets received, 0% packet loss
      round-trip min/avg/max = 4.4/8.3/14.0 ms
      Starting plip interface: done
     

Updating the start scripts is a good occasion to reboot a Unix system, to check the modifications. Do it:

      $ init 6 # or "shutdown -r now" or "reboot"
     

19.2 On the target side

Update the file /etc/init.d/network:

      #! /bin/sh
      #######################
      # /etc/init.d/network #
      #######################

      ifconfig lo 127.0.0.1
      route add -net 127.0.0.0
      
      ifconfig plip1 192.168.0.1 pointopoint 192.168.0.2 netmask 255.255.255.255 up
      route add -host 192.168.0.2 dev plip1
     

That's all because the parport features are directly in the kernel.

Updating the start scripts is a good occasion to reboot a Unix system, to check the modifications. Do it: .:: anotepad.com ::.

      $ init 6