Startup script unable to mount a partition...

[usmanajmal]

Hi


Is there a way I can run myProgram when desktop appears no matter if root , administrator, desktop user or an unprivileged user logs in?



I actually developed a script which I set to run at startup i.e. when the Desktop appears. Script runs finely but can't mount a partition. In the script I mounted a partition using
Code:

sudo mount /dev/sda1 /mnt &> result.txt

After executing script a file named result.txt was created which contained
Code:

sudo: no tty present and no askpass program specified

In other words the mounting failed. If I run the script myself from the terminal using sudo ./myProgram i don't face this problem and the drive gets mounted successfully.
Any suggestions please....

[scathefire]

you probably have a line in your sudoers file that says:

Defaults    requiretty

this keeps sudo code from being executed if no tty is present that it was called from. So you can comment it out, and it will work.

[usmanajmal]

Sorry I did not have

Defaults requiretty

but I do have

Defaults env_reset

I commented it out but the problem prevails.

In case my question is not clear, let me put it again:

I want a program to run (which copies a partition into another partition) at startup whenever a user gets to Desktop, no matter if he is root, admin, unprivileged or simple Desktop user. The Desktop or unprivileged user must not have permission to copy partitions themselves but my startup program should be able to copy partitions in background when these users log in. Is it possible?

[usmanajmal]

Hi

The main question:

Is there a way I can run 'completely' one of my script when ubuntu's desktop appears no matter if root , administrator, desktop user or an unprivileged user logged in?

What does the script do?

The script mounts a partition, looks for a file in that partition and finally on the basis of that file a decision of copying a partition to another partition is made. That copying is done via

dd if=/dev/sda2 of=/dev/sda5

When does the script run finely?

Script runs smoothly when I run it from the terminal by

sudo ./my_copying_script

This command asks me for the password of currently logged in user. I enter the password and the script starts working.

When does the script NOT run finely?

I want to run the script at startup. I set it a startup program by using the Startup Applications utility of Ubuntu. Script ran at startup but exited at the dd command returing following error:

dd: opening '/dev/sda2': Permission denied

I then prefixed the dd with sudo as mentioned below

 sudo dd if=/dev/sda2 of=/dev/sda5

but this returned following error:

sudo: no tty present and no askpass program specified

Any suggestions please?

[scathefire]

perhaps i'm missing something here but if these are fixed partitions why not just make a fstab entry to mount them? then just have a script that copies to and from the partitions in question whenever they logon.

[previso]

I don't know much about scripting, but it seems to me root owns the script, hence it runs only when sudo is logged. Right click and "properties" , "permissions" the script, and enable "others", including group, to execute the script. (maybe?)
From the follow up posting, it seems sudo and you have privilege to access the disk, but not "others", that may limit the functionality of the script without a log-in.

[oz]

Hello, usmanajmal

Duplicate threads are not allowed on the forums so I'm merging the two threads that you've created and you can carry on here regarding this topic.