LinuxQuestions.org - [SOLVED] Help me on how to umount partition when its opened on another shell...

Hello All

I've a LUKS parition on /dev/sda3. I don't want to mount this partition on boot, so I've written this script to mount and umount as and when its required. I've put this script in /etc/bash.bashrc

Any time I want to open this partition, I type 'yama 1'. To close I type 'yama 0'. I've also ensured, while umounting partition, if I'm in the same partition (directory), I'll be moved to home directory - and then it will be umounted. But this works fine when I'm on the same shell. While I'm on the partition in one tab, and if I open a new tab, and there I type 'yama 0', then I get error and partition will not be umounted.

How do I ensure, no matter where i issue command, the partition will be umounted successfully.

This is my script

Code:

function yama() {

  # Opens or closes ym filesystem

  # To open : yama 1

  # To close: yama 0



  choice=$1



  if [[ $# -ne 1 ]] ; then

    echo "No arguments given. Give '1' to mount, '0' to umnount."

    exit

  elif [[ $choice -eq 1 ]]; then

    if mountpoint -q "/ym"; then

      echo "Yama already mounted. Doing nothing."

    else

      echo "Mounting Yama..."

      sudo cryptsetup luksOpen /dev/sda3 drdo

      sudo mount /dev/mapper/drdo /ym 

      echo "Yama Opened."

      cd /ym 

    fi  

  elif [[ $choice -eq 0 ]]; then

    if mountpoint -q "/ym"; then

      echo "Unmounting Yama..."

      cd ~

      sudo umount /ym 

      sudo cryptsetup luksClose drdo

      echo "Yama Closed"

    else

      echo "Yama Not mounted. Doing nothing."

    fi  

  else

    echo "I dont know what you said"

  fi  

}

Result

Code:

[abc@xyz ~]$ yama 1

Mounting Yama...

[sudo] password for abc: 

Enter passphrase for /dev/sda3: 

Yama Opened.

[abc@xyz /ym]$



[abc@xyz /ym]$ yama 0

Unmounting Yama...

Yama Closed

[abc@xyz ~]$

This is the error - when I try to close on another tab
Tab 1:

Code:

[abc@xyz ~]$ yama 1

Mounting Yama...

[sudo] password for abc: 

Enter passphrase for /dev/sda3: 

Yama Opened.

[abc@xyz /ym]$

Tab 2:

Code:

[abc@xyz ~]$ yama 0

Unmounting Yama...

[sudo] password for abc: 

umount: /ym: target is busy

        (In some cases useful info about processes that

        use the device is found by lsof(8) or fuser(1).)

device-mapper: remove ioctl on drdo failed: Device or resource busy

device-mapper: remove ioctl on drdo failed: Device or resource busy

device-mapper: remove ioctl on drdo failed: Device or resource busy

device-mapper: remove ioctl on drdo failed: Device or resource busy

device-mapper: remove ioctl on drdo failed: Device or resource busy

The error message is suggesting to use lsof or fuser, but I know what's the problem - its opened in another tab.

How do i solve this?

Thanks