ioctl_test.h

linux device driver example

#ifndef _IOCTLTEST_H_  
#define _IOCTLTEST_H_  
  
#define IOCTLTEST_MAGIC    't'  
  
typedef struct 
{ 
	unsigned long size;  
	unsigned char buff[128];  
} __attribute__ ((packed)) ioctl_test_info; 
  
#define IOCTLTEST_LEDOFF           _IO(  IOCTLTEST_MAGIC, 0 )  
#define IOCTLTEST_LEDON            _IO(  IOCTLTEST_MAGIC, 1 )  
#define IOCTLTEST_GETSTATE         _IO(  IOCTLTEST_MAGIC, 2 )   
  
#define IOCTLTEST_READ             _IOR( IOCTLTEST_MAGIC, 3 , ioctl_test_info )  
#define IOCTLTEST_WRITE            _IOW( IOCTLTEST_MAGIC, 4 , ioctl_test_info )  
#define IOCTLTEST_WRITE_READ       _IOWR( IOCTLTEST_MAGIC, 5 , ioctl_test_info )  
  
#define IOCTLTEST_MAXNR                                   6  
    
#endif // IOCTLTEST_H_