High-level Icano function of Reading Notes on linux High-performance Server
Background: These functions were meant to be discussed later, but suddenly interest came, so let's look at some of them first.
Profile: divided into three categories
1.1 Function for creating file descriptors, pipe,dup/dup2
1.2 readv/writev,sendfile,mmap/munmap,splice,tee functions
1.3 Function to control I/O behavior and attributes, fcntl
Let's start with this.
