different o characters

[Reprinted] O & M career direction! How can I enter the O & M industry? Essential Skills and skills for O & M engineers Preface: Reprinted Chen Hao's previous article on Security O & M. Well written. Very nice people, encountered a problem, qq

1. buffered I/O, that is, standard I/O First, it should be clear that unbuffered I/O is only relative to buffered I/O, that is, standard I/O. Instead of using unbuffered I/O to read and write data to a disk, there is no buffer. In fact, the kernel

How can we become an excellent Linux O & M personnel ?, One linux O & M Today, I want to talk about how to become a good linux O & M personnel ?" I will analyze the current situation of the Linux industry from the following three parts and how to

1. the UNIX tradition of the I/O buffer of the C standard library is everything is a file, the keyboard, display, serial port, disk, and other devices have a special device file in the/dev directory, these device files can be opened, read, written,

We can treat file I/O as a system call and the kernel to perform I/O operations, where the concept of page caching (cache area) is involved, and file I/O execution is related to the cache.While standard I/O is the encapsulation of system I/O calls,

The I/O functions described in the previous article, "Advanced programming----file descriptors for UNIX environments" are for file descriptors. For standard I/O libraries, they operate around streams. When opening or creating a file with a standard

This blog for my own summary of relevant knowledge written, if there is similar, purely coincidental. The I/O system structure is categorized as follows: External memory Device controller: CD, tape, disk; Output device controller: CRT, laser printer,

3.4 manage I/O port resources We all know that the x86 processor using I/O ing implements a separate address space for the peripherals, that is, the "I/O space" (I/OOr "I/O port space". Its size is 64 KB (0x0000-0xffff ). Linux implements the

Select and poll FunctionsIn the previous chapter, we encountered a problem that the client was blocked from reading data from the standard input. At the same time, the server required to close the connection for some reason and sent a fin to the

Summary: overlapped I/O, also known as asynchronous I/O, is an asynchronous I/O model. Asynchronous I/O is different from Synchronous I/O, Program Suspended until I/O processing is complete. Asynchronous I/O: calls a function to tell the OS to