linux系统ioctl使用示例

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1、linux系统ioctl使用示例Thesewerewritedandcollectedbykf701,youcanuseandmodifythembutNOWARRANTY.Contactwithme:kf_701@21cn.com程序1：检测接口的inet_addr,netmask,broad_addr程序2：检查接口的物理连接是否正常程序3：更简单一点测试物理连接程序4：调节音量***************************程序1****************************************#include#include

2、tring.h>#include#include#include#include#include#include#include#include#includestaticvoidusage(){printf("usage:ipconfiginterface");exit(0);}intmain(intargc,char**argv){structsockadd

3、r_in*addr;structifreqifr;char*name,*address;intsockfd;if(argc!=2)usage();elsename=argv[1];sockfd=socket(AF_INET,SOCK_DGRAM,0);strncpy(ifr.ifr_name,name,IFNAMSIZ-1);if(ioctl(sockfd,SIOCGIFADDR,&ifr)==-1)perror("ioctlerror"),exit(1);addr=(structsockaddr_in*)&(ifr.ifr_addr);address=inet_ntoa(

4、addr->sin_addr);printf("inetaddr:%s",address);if(ioctl(sockfd,SIOCGIFBRDADDR,&ifr)==-1)perror("ioctlerror"),exit(1);addr=(structsockaddr_in*)&ifr.ifr_broadaddr;address=inet_ntoa(addr->sin_addr);printf("broadaddr:%s",address);if(ioctl(sockfd,SIOCGIFNETMASK,&ifr)==-1)perror("ioctlerror"),exi

5、t(1);addr=(structsockaddr_in*)&ifr.ifr_addr;address=inet_ntoa(addr->sin_addr);printf("inetmask:%s",address);printf("");exit(0);}********************************程序2*****************************************************#include#include#include#include#in

6、clude#include#include#include#include#includetypedefunsignedshortu16;typedefunsignedintu32;typedefunsignedcharu8;#include#includeintdetect_mii(intskfd,char*ifname){structifreqifr;u16*data,m

7、ii_val;unsignedphy_id;/*Getthevitalsfromtheinterface.*/strncpy(ifr.ifr_name,ifname,IFNAMSIZ);if(ioctl(skfd,SIOCGMIIPHY,&ifr)<0){fprintf(stderr,"SIOCGMIIPHYon%sfailed:%s",ifname,strerror(errno));(void)close(skfd);return2;}data=(u16*)(&ifr.ifr_data);phy_id=dat