Linux_stat.c
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <fcntl.h>
- #include <errno.h>
- #include <sys/ioctl.h>
- #include <sys/types.h>
- #include <sys/socket.h>
- #include <linux/if.h>
- #include <linux/sockios.h>
- #include <linux/ethtool.h>
- int get_netlink_status(const char *if_name);
- int main()
- {
- if(getuid() != 0)
- {
- fprintf(stderr, "Netlink Status Check Need Root Power./n");
- return 1;
- }
- printf("Net link status: %d/n", get_netlink_status("eth0"));
- return 0;
- }
- // if_name like "ath0", "eth0". Notice: call this function
- // need root privilege.
- // return value:
- // -1 -- error , details can check errno
- // 1 -- interface link up
- // 0 -- interface link down.
- int get_netlink_status(const char *if_name)
- {
- int skfd;
- struct ifreq ifr;
- struct ethtool_value edata;
- edata.cmd = ETHTOOL_GLINK;
- edata.data = 0;
- memset(&ifr, 0, sizeof(ifr));
- strncpy(ifr.ifr_name, if_name, sizeof(ifr.ifr_name) - 1);
- ifr.ifr_data = (