我从网上找了一个修改mac地址的代码，在我pc的ubuntu的环境能够正常运行，放到arm板上总是提示：ioctl(SIOCSIFHWADDR):Device or resource busy 的错误。请问是什么原因啊
#include <syspes.h> /* for socket(2) and related bits and pieces */
#include <sys/socket.h> /* for socket(2) */
#include <net/if.h> /* for struct ifreq */
#include <net/if_arp.h> /* for ARPHRD_ETHER */
#include <sys/ioctl.h> /* for IOCTL's */
#include <stdio.h> /* for fprintf etc */
#include <unistd.h> /* for close */
int main(int argc,char **argv)
{
struct ifreq ifr;
int skfd;
if (argc<3) {
fprintf(stderr,"usage:/n%s interface hwaddr/n",argv[1]);
return 1;
}
/* Fill in the structure */
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", argv[1]);
ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
/* TODO: write some code to parse argv[2] into ifr.ifr_hwaddr.sa_data */
/* memcpy(&ifr.ifr_hwaddr.sa_data, argv[2], sizeof(ether.address)); */
/* Create a socket fd */
skfd = socket(PF_INET,SOCK_STREAM,0);
/* call the IOCTL */
if (ioctl(skfd, SIOCSIFHWADDR, &ifr) < 0) {
perror("ioctl(SIOCSIFHWADDR)");
return 1;
}
/* cleanup */
close(skfd);
/* we're out of here! */
return 0;
}
