järjestelmäkutsuriippuvuuden

järjestelmäkut is a Finnish term that translates to "system call" in English. In computing, a system call is the programmatic way a computer program requests a service from the kernel of the operating system it is executed on. This is typically the fundamental interface between a process and the operating system.

System calls are the means by which user-level processes can interact with the operating system's protected kernel functions. These services include things like file I/O operations (reading from or writing to files), process management (creating, terminating, or controlling other processes), memory management, and device management. When a program needs to perform an operation that it doesn't have direct permission to do, such as accessing hardware or managing system resources, it makes a system call.

The operating system kernel intercepts these calls, verifies their legitimacy, and then performs the requested service on behalf of the program. This mechanism ensures that user programs cannot directly interfere with critical system resources, maintaining system stability and security. Different operating systems provide different sets of system calls, though many common functionalities are standardized across different platforms. The specific implementation and names of system calls can vary, but the underlying concept of a program requesting a service from the operating system kernel remains consistent.