【Linux裝置驅動程式（第三版）】—-模組參數

 【Linux裝置驅動程式（第三版）】----模組參數

HelloWorldParam.c

#include <linux/init.h>#include <linux/module.h>#include <linux/moduleparam.h>MODULE_LICENSE("Dual BSD/GPL");static char *whom = "world";static int howmany = 1;module_param(whom, charp, S_IRUGO);module_param(howmany, int, S_IRUGO);static int __init hello_init(void){printk(KERN_ALERT "Hello, World!\n");int i;for( i = 0; i < howmany; i++)printk(KERN_ALERT "(%d) Hello, %s\n", i, whom);return 0;}static void __exit hello_exit(void){printk(KERN_ALERT "Goodbye,world!\n");}module_init(hello_init);module_exit(hello_exit);

Makefile

obj-m:= HelloWorldParam.omodules-objs:= HelloWorldParam.oKDIR:= /usr/src/linux-headers-2.6.31-14-generic/PWD:= $(shell pwd)default:make -C $(KDIR) M=$(PWD) modulesclean:rm -rf *.ko *.mod.c *.mod.o *.o *.markers *.symvers *.order

裝載

insmod HelloWordParam howmany=10 whom="Tom"

查看Log(dmesg)

[89611.281829] Hello, World![89611.281833] (0) Hello, Tom[89611.281834] (1) Hello, Tom[89611.281835] (2) Hello, Tom[89611.281836] (3) Hello, Tom[89611.281837] (4) Hello, Tom[89611.281838] (5) Hello, Tom[89611.281840] (6) Hello, Tom[89611.281841] (7) Hello, Tom[89611.281842] (8) Hello, Tom[89611.281843] (9) Hello, Tom