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editing dot files since 1998

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editing dot files since 1998
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cvam0000 / DynamicallyAllocation.c
Created January 5, 2020 22:09
#include<linux/module.h>
#include<linux/init.h>
#include<linux/kernel.h>
#include<linux/fs.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("CVAM");
MODULE_VERSION("0.1");
dev_t dev=0;
@cvam0000
cvam0000 / StaticAllocationOfMajorAndMinorNumbers.c
Created January 5, 2020 22:07
#include<linux/module.h>
#include<linux/init.h>
#include<linux/kernel.h>
#include<linux/fs.h>
MODULE_LICENSE("GPL");
MODULE_AUTHOR("CVAM");
MODULE_VERSION("0.1");
dev_t dev=MKDEV(235,0); // dev is the dev_t structure variable for major and minor no.
@cvam0000
cvam0000 / .vimrc
Created December 24, 2019 03:14 — forked from rocarvaj/.vimrc
Minimal .vimrc for C/C++ developers
" VIM Configuration File
" Description: Optimized for C/C++ development, but useful also for other things.
" Author: Gerhard Gappmeier
"
" set UTF-8 encoding
set enc=utf-8
set fenc=utf-8
set termencoding=utf-8
" disable vi compatibility (emulation of old bugs)
@cvam0000
cvam0000 / kmalloc
Created December 22, 2019 04:50
/* An example of Memory Allocation */
#include<linux/slab.h>
#include<linux/init.h>
#include<linux/module.h>
#include<linux/kernel.h>
#define size 10
MODULE_DESCRIPTION("example of memory allocation ");
@cvam0000
cvam0000 / pr_emerge
Created December 22, 2019 04:39
pr_emerg(fmt, ...); /* similar to printk(KERN_EMERG pr_fmt(fmt), ...); */
pr_alert(fmt, ...); /* similar to printk(KERN_ALERT pr_fmt(fmt), ...); */
pr_crit(fmt, ...); /* similar to printk(KERN_CRIT pr_fmt(fmt), ...); */
pr_err(fmt, ...); /* similar to printk(KERN_ERR pr_fmt(fmt), ...); */
pr_warning(fmt, ...); /* similar to printk(KERN_WARNING pr_fmt(fmt), ...); */
pr_warn(fmt, ...); /* similar to cu printk(KERN_WARNING pr_fmt(fmt), ...); */
pr_notice(fmt, ...); /* similar to printk(KERN_NOTICE pr_fmt(fmt), ...); */
pr_info(fmt, ...); /* similar to printk(KERN_INFO pr_fmt(fmt), ...); */
@cvam0000
cvam0000 / printk
Created December 22, 2019 04:34
/* Some more example of the macros for the Alert msg are */
#define KERN_EMERG "<0>" /* system is unusable */
#define KERN_ALERT "<1>" /* action must be taken immediately */
#define KERN_CRIT "<2>" /* critical conditions */
#define KERN_ERR "<3>" /* error conditions */
#define KERN_WARNING "<4>" /* warning conditions */
#define KERN_NOTICE "<5>" /* normal but significant condition */
#define KERN_INFO "<6>" /* informational */
#define KERN_DEBUG "<7>" /* debug-level messages */
@cvam0000
cvam0000 / error conventions
Last active December 22, 2019 03:58
if(alloc_memory() != 0 )
return -ENOMEM;
if (user_parameter_valid()!=0)
return -EINVAL;
/*
Some of the examples of the macros are
#define ENOTEMPTY 39 /* Directory not empty */
@cvam0000
cvam0000 / Kbuild
Created December 17, 2019 02:23
EXTRA_CFLAGS = -Wall -g
obj-m = example_lkm.o
@cvam0000
cvam0000 / Makefile
Last active December 17, 2019 03:39
KDIR = /lib/modules/`uname -r`/build
kbuild:
make -C $(KDIR) M=`pwd`
clean:
make -C $(KDIR) M=`pwd` clean
@cvam0000
cvam0000 / example_lkm.c
Last active December 17, 2019 01:58
/* An Example of Loadable Kernel Module */
#include<linux/kernel.h>
#include<linux/init.h>
#include<linux/module.h>
MODULE_DESCRIPTION("cvam example kernel module ");
MODULE_AUTHOR("cvam");
MODULE_LICENSE("GPL");