... issuing extraneous system calls.• You prefer a higher-level interface to the low-level Linux system calls.The most flexibility, however, exists when you work directly with the Linux system calls. ... ret;}Thankfully, this is not the Linux implementation: Linux implements readv( ) andwritev( ) as system calls, and internally performs scatter/gather I/O. In fact, all I/Oinside the Linux kernel is vectored;read( ... teaching the readerabout almost every system call on a Linux system. In so doing, he has produced atome that will allow you to fully understand how the Linux kernel works from auser-space perspective,...