linux系统ioctl使用示例Linux认证考试
文章作者 100test 发表时间 2009:12:11 17:40:48
来源 100Test.Com百考试题网
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 <.stdio.h>.
#include <.string.h>.
#include <.stdlib.h>.
#include <.errno.h>.
#include <.unistd.h>.
#include <.sys/types.h>.
#include <.sys/socket.h>.
#include <.netinet/in.h>.
#include <.arpa/inet.h>.
#include <.sys/ioctl.h>.
#include <.net/if.h>.
static void usage(){
printf("usage : ipconfig interface \n").
exit(0).
}
int main(int argc,char **argv)
{
struct sockaddr_in *addr.
struct ifreq ifr.
char *name,*address.
int sockfd.
if(argc != 2)
usage().
else
name = argv[1].
sockfd = socket(AF_INET,SOCK_DGRAM,0).
strncpy(ifr.ifr_name,name,IFNAMSIZ-1).
if(ioctl(sockfd,SIOCGIFADDR,&.ifr) == -1)
perror("ioctl error"),exit(1).
addr = (struct sockaddr_in *)&.(ifr.ifr_addr).
address = inet_ntoa(addr->.sin_addr).
printf("inet addr: %s ",address).
if(ioctl(sockfd,SIOCGIFBRDADDR,&.ifr) == -1)
perror("ioctl error"),exit(1).
addr = (struct sockaddr_in *)&.ifr.ifr_broadaddr.
address = inet_ntoa(addr->.sin_addr).
printf("broad addr: %s ",address).
if(ioctl(sockfd,SIOCGIFNETMASK,&.ifr) == -1)
perror("ioctl error"),exit(1).
addr = (struct sockaddr_in *)&.ifr.ifr_addr.
address = inet_ntoa(addr->.sin_addr).
printf("inet mask: %s ",address).
printf("\n").
exit(0).
}