A C language function that is used to request services from the UNIX kernel.
A system call is a function that is called by the user that requires the operating system to perform some work on behalf of the caller. Systems call cause the UNIX kernel to perform some operations on behalf of the user. Many common UNIX 'C' functions are system calls.
A request by an active process for a service performed by the UNIX system kernel, such as I/O or process creation. All system operations are allocated, initiated, monitored, manipulated, and terminated through system calls. System calls allow a user-level program to do work that the program would not normally be able to do.
A system call is a call that requires kernel intervention to complete. Generally, system calls involve access to global resources (such as disks). System calls require at least 2 context switches to complete: a switch from user mode to kernel mode and back again. For this reason, system calls are slower than library calls.
a C function which transfers control to a point within the operating system kernel
a C library function that requests kernel services
a function call made by a C library function to the L INUX kernel
a function that lets you talk to the operating-system kernel
a method of requesting some sort of service from the kernel
a normal function that calls the hardware directly
a request for an operating systems service
a request for service that a program makes of the kernel
a request to the kernel in a Unix-like operating system by an active process for a service performed by the kernel
a request to the kernel to do some work for you
A coroutine-based mechanism for providing an operating system service to a thread. In a preemptible operating system it is irrelevant to the scheduler whether a thread is executing a system call or not.
A routine that makes the operating system available to a program or that requests services from the operating system.
A system call is a routine that accomplishes a system-level function on behalf of a process.
The services provided by the kernel to application programs, and the way in which they are invoked. See section 2 of the manual pages.
The lowest-level access to the UNIX operating system. Everything else in UNIX is built on system calls. See also library function.
(also: syscall) the way a program transitions from userspace into kernel space, to call a kernel space function.
In computing, a system call is the mechanism used by an application program to request service from the operating system.