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A high-level overview of the Linux kernel's system call interface, which handles communication between its various components and the userspace. 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 [a] on which it is executed.
Stream socket input/output may execute the regular-file system calls of read() and write(). [6] However, more control is available if a stream socket executes the socket-specific system calls of send() and recv(). Alternatively, datagram socket input/output should execute the socket-specific system calls of sendto() and recvfrom(). [22]
Unix domain socket: Similar to an internet socket, but all communication occurs within the kernel. Domain sockets use the file system as their address space. Processes reference a domain socket as an inode, and multiple processes can communicate with one socket: All POSIX operating systems and Windows 10 [6] Message queue
The Mingw-w64 project also contains a wrapper implementation of 'pthreads, winpthreads, which tries to use more native system calls than the Pthreads4w project. [ 7 ] Interix environment subsystem available in the Windows Services for UNIX/Subsystem for UNIX-based Applications package provides a native port of the pthreads API, i.e. not mapped ...
A network socket is a software structure within a network node of a computer network that serves as an endpoint for sending and receiving data across the network. The structure and properties of a socket are defined by an application programming interface (API) for the networking architecture.
This port added the putmsg, getmsg, and poll system calls, which are nearly equivalent in purpose to the send, recv, and select calls from Berkeley sockets. The putmsg and getmsg system calls were originally called send and recv, [5] but were renamed to avoid namespace conflict. [6] In System V Release 4, STREAMS was extended and used for the ...
On Unix operating systems, two other vectored call interfaces are popular: the fcntl ("file control") system call configures open files, and is used in situations such as enabling non-blocking I/O; and the setsockopt ("set socket option") system call configures open network sockets, a facility used to configure the ipfw packet firewall on BSD ...
A Berkeley socket is an application programming interface (API) for Internet domain sockets and Unix domain sockets, used for inter-process communication (IPC). It is commonly implemented as a library of linkable modules. It originated with the 4.2BSD Unix operating system, which was released in 1983.