Why are these considered privileged/not privileged?

  • Thread starter Thread starter whitehorsey
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The discussion centers on the classification of certain operations as privileged or not. Setting a timer and invoking a system call are considered privileged actions, as they require higher-level permissions to prevent unauthorized access. In contrast, reading the clock and checking the current list of running processes are deemed non-privileged since they can be accessed by any user. The rationale behind this classification lies in the potential security risks associated with allowing unrestricted access to system calls and timer settings. Overall, the distinction is based on the need to protect critical system functions from unauthorized manipulation.
whitehorsey
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1. Why are these considered privileged/not privileged?
a. Set value of timer.
b. Read the clock.
c. Invoking a system call
d. Check the current list of running processes


3. a. Yes
b. No
c. Yes
d. No

I'm thinking b/d is not privileged because anyone can have access to it? But I'm not sure what makes a and c privileged.
 
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Think about (c): would you really want just anybody to be able to invoke a system call?
Compare with (b) - does it matter who can read the clock?
 
Thread 'Have I solved this structural engineering equation correctly?'

Thread 'Have I solved this structural engineering equation correctly?'

Hi all, I have a structural engineering book from 1979. I am trying to follow it as best as I can. I have come to a formula that calculates the rotations in radians at the rigid joint that requires an iterative procedure. This equation comes in the form of: $$ x_i = \frac {Q_ih_i + Q_{i+1}h_{i+1}}{4K} + \frac {C}{K}x_{i-1} + \frac {C}{K}x_{i+1} $$ Where: ## Q ## is the horizontal storey shear ## h ## is the storey height ## K = (6G_i + C_i + C_{i+1}) ## ## G = \frac {I_g}{h} ## ## C...
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