Imbus/kernelmod_demo
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Imbus 2026-02-24 13:57:41 +01:00
parent deb6fbd6c9
commit 8d5f6aab17
3 changed files with 12 additions and 6 deletions
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12
ioctl_chardev/my-ioctl.h
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@ -1,14 +1,16 @@
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef MY_IOCTL_H
#define MY_IOCTL_H
#include <linux/ioctl.h>
/*
* Crucial point here, the kernel defines a set of macros for defining IOCTL numbers:
* _IO - No command
* _IOR - Read command
* _IOW - Write command
* _IORW - RW command
* _IOC - Basis of the others
* _IO - No command
* _IOR - Read command
* _IOW - Write command
* _IORW - RW command
* _IOC - Basis of the others
* These macros encode the data type passed to the ioctl.
*/