《Linux Device Drivers Development》——Chap 4 Character Device Drivers

目录

• Device number allocating
• Allocating and registering a character device
• File Operations
• • Exchange data between user space and kernel
  • open Method
  • release Method
  • write Method
  • read Method
  • llseek method
  • poll Method
  • ioctl method

Device number allocating

Allocating and registering a character device

File Operations Exchange data between user space and kernel

open Method

release Method

write Method

Just an overview of the writing process. This example returns the number of bytes copied.

read Method

llseek method

poll Method

ioctl method