網(wǎng)絡(luò)操作系統(tǒng)課程設(shè)計(jì)-資料下載頁
2025-07-07 15:51本頁面
【正文】 程比較簡單，命令如下：sudomakesudoinsmod（此處可用sudolsmod看看是否成功）sudomknod/dev/chardev0 c 255 0（chardev0是設(shè)備名，c代表字符設(shè)備，255是主設(shè)備號(hào)，0是從設(shè)備號(hào)）然后在寫一個(gè)測試程序測試就可以了。這里我只給了這個(gè)設(shè)備一個(gè)字符的緩沖區(qū)大小。我的讀寫測試程序是分開的，就是有一個(gè)程序讀，另一個(gè)程序?qū)?。源代碼（1）字符驅(qū)動(dòng)設(shè)備程序include linux/include linux/include linux/include asm/include linux/MODULE_LICENSE(GPL)。MODULE_AUTHOR(SH)。define DP_MAJOR 255define DP_MINOR 0/*具體的操作函數(shù)聲明*/static ssize_t char_read(struct file *, char *, size_t, loff_t*)。static ssize_t char_write(struct file *, const char *, size_t, loff_t*)。static ssize_t char_open(struct inode *,struct file *)。static ssize_t char_release(struct inode *,struct file *)。/* file_operations結(jié)構(gòu)體*/struct file_operations char_ops = {.read = char_read,.write = char_write,.open = char_open,.release = char_release,}。/*字符設(shè)備的緩沖區(qū)*/static char buffer = 39。c39。static int dev_open。/*初始化*/static int __init char_init(void){int ret。ret = register_chrdev(DP_MAJOR,chardev,amp。char_ops)。//注冊設(shè)備if(ret){printk(chardev register failure)。}else{printk(chardev register success)。}return ret。}/*退出*/static void __exit char_exit(void){printk(unregister......)。unregister_chrdev(DP_MAJOR,chardev)。//注銷}/*打開一個(gè)設(shè)備*/static ssize_t char_open(struct inode *inode,struct file *file){if(dev_open==0)dev_open++。else{printk(KERN_ALERTAnother process open the char device\n)。return 1。}try_module_get(THIS_MODULE)。return 0。}/*關(guān)閉一個(gè)設(shè)備*/static ssize_t char_release(struct inode *inode,struct file *file){if(dev_open==1){dev_open。}module_put(THIS_MODULE)。return 0。}/*讀取緩沖區(qū)內(nèi)容*/static ssize_t char_read(struct file *filp, char *buf, size_t len, loff_t *off){if(copy_to_user(buf,amp。buffer,sizeof(int))){return EFAULT。}return sizeof(int)。}/*向緩沖區(qū)中寫入內(nèi)容*/static ssize_t char_write(struct file *filp, const char *buf, size_t len, loff_t *off){if(copy_from_user(amp。buffer,buf,sizeof(int))){return EFAULT。}return sizeof(int)。}module_init(char_init)。module_exit(char_exit)。（2）makefile文件ifeq ($(KERNELRELEASE),)KERNELDIR ?=/usr/src/PWD := $(shell pwd)modules:$(MAKE) C $(KERNELDIR) M=$(PWD)modules_install:$(MAKE) C $(KERNELDIR) M=$(PWD)modules_installclean:rm rf *.o *~core .depend .*.cmd *.ko *. tmp_versions.PHONY:modules modules_install cleanelseobjm := endif（3）include include include sys/include sys/include include include int main(void){int testdev。int i。char buf。testdev = open(/dev/chardev0,O_RDWR)。if ( testdev == 1 ){printf(Cann39。t open file \n%d\n,testdev)。exit(0)。}memset(amp。buf, 0, sizeof(char))。read(testdev,amp。buf,sizeof(char))。printf(%c\n,buf)。close(testdev)。return 0。}（4）include include include sys/include sys/include include include int main(void){int testdev。int i。char buf。testdev = open(/dev/chardev0,O_RDWR)。if ( testdev == 1 ){printf(Cann39。t open file \n%d\n,testdev)。exit(0)。}printf(please input the number written\n)。scanf(%c,amp。buf)。write(testdev,amp。buf,sizeof(char))。close(testdev)。return 0。}任務(wù)管理器這個(gè)程序基本上是參照了windows下的任務(wù)管理器來寫的，所以基本上就叫做任務(wù)管理器了。整個(gè)管理器的圖形部分是由GTK編寫的，用到了一些常用構(gòu)件和容器比如label、progress_bar、notebook等，還用到了一些其他構(gòu)件比如GtkListStore、GtkTreeViewColumn、GtkTreeIter等。整個(gè)程序還是有一定的復(fù)雜性的，但總的來說終點(diǎn)主要是在兩個(gè)方面，一個(gè)是從/proc文件夾下讀取所需要的系統(tǒng)信息并進(jìn)行加工利用，另一個(gè)就是是用GTK完成整個(gè)界面的設(shè)計(jì)。由于代碼量還是有一點(diǎn)大，這里無法詳細(xì)的進(jìn)行解釋，所以請參照代碼的注釋和程序運(yùn)行的結(jié)果理解。本程序的源代碼經(jīng)過了一定的整理，在結(jié)構(gòu)上還是比較清晰的，而且在關(guān)鍵的地方都有注釋，包括相應(yīng)的信息是從哪個(gè)文件讀取的等等。程序運(yùn)行的結(jié)果如
高考資料相關(guān)推薦
鄂ICP備17016276號(hào)-1