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Qu'est-ce (qui) est system call - définition

IN COMPUTER SCIENCE, THE MECHANISM USED BY AN APPLICATION PROGRAM TO REQUEST SERVICE FROM THE OPERATING SYSTEM OR ANOTHER APPLICATION PROGRAM

System calls; Syscall; System Call; Int 0x80; INT 0x80

system call

<operating system, programming> The mechanism used by an application program to request service from the {operating system}. System calls often use a special machine code instruction which causes the processor to change mode (e.g. to "supervisor mode" or "protected mode"). This allows the OS to perform restricted actions such as accessing hardware devices or the memory management unit. (1995-03-01)

System call

In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the kernel of the operating system on which it is executed. This may include hardware-related services (for example, accessing a hard disk drive or accessing the device's camera), creation and execution of new processes, and communication with integral kernel services such as process scheduling.

https://en.wikipedia.org/wiki/System_call

Call login system

Call Login Systems

Call login systems are telephone systems that allow voice-based call center executives to log into their phone equipment in order to make or receive calls. This system helps in calculating login hours, documentation hours, and break timings.

https://en.wikipedia.org/wiki/Call_login_system

Wikipédia

System call

In computing, a system call (commonly abbreviated to syscall) is the programmatic way in which a computer program requests a service from the operating system on which it is executed. This may include hardware-related services (for example, accessing a hard disk drive or accessing the device's camera), creation and execution of new processes, and communication with integral kernel services such as process scheduling. System calls provide an essential interface between a process and the operating system.

In most systems, system calls can only be made from userspace processes, while in some systems, OS/360 and successors for example, privileged system code also issues system calls.

https://en.wikipedia.org/wiki/System call