Linux系统设计-Linux操作系统

### UNIX系统文件I/O UNIX系统中大多数文件I/O都只用到5个函数： open()/read()/write()/lseek()/close()。这些函数经常被称为不带缓冲的 I/O(unbuffered I/O)，不带缓冲是指每个read()和write()都调用内核中的一个系统调用。这些I/O函数不是ISO C的组成 部分，但是它们是POSIX.1和Single UNIX Specification 的组成部分。 <br> ### 目录 * [文件描述符](https://github.com/xiyelin/Linux/blob/master/File/The%20file%20descriptor.md) * [open()](https://github.com/xiyelin/Linux/blob/master/File/Open%20Function.md) * [create()](https://github.com/xiyelin/Linux/blob/master/File/Create%20Function.md) * [close()](https://github.com/xiyelin/Linux/blob/master/File/Close%20Function.md) * [lseek()](https://github.com/xiyelin/Linux/blob/master/File/Lseek%20Function.md) * [read()](https://github.com/xiyelin/Linux/blob/master/File/Read%20Function.md) * [write()](https://github.com/xiyelin/Linux/blob/master/File/Write%20Function.md) * [I/O的效率](https://github.com/xiyelin/Linux/blob/master/File/The-efficiency-of-the-I%5CO.md) * [文件共享](https://github.com/xiyelin/Linux/blob/master/File/File%20sharing.md) * [原子操作](https://github.com/xiyelin/Linux/blob/master/File/Atomic%20operation.md) * [dup()和dup2()](https://github.com/xiyelin/Linux/blob/master/File/dup%20and%20dup2.md) * [sysc()、fsync()、fdatasync()](https://github.com/xiyelin/Linux/blob/master/File/sysc%E3%80%81fsync%20and%20fdatasync%20Function.md) * [fcntl()](https://github.com/xiyelin/Linux/blob/master/File/Fcntl%20Function.md) <br> --------------------------------------------------------------------------------------------------