gistfile1.txt

#include <unistd.h>
#include <string.h>
#include <stdio.h>

#include <sys/types.h>
#include <sys/socket.h>
#include <linux/netlink.h>
#include <linux/rtnetlink.h>

#define SOL_NETLINK     270

int main()
{
	int sk, val = 1;
	struct sockaddr_nl addr;
	struct msghdr msg;
        struct {
                struct nlmsghdr hdr;
        } req;
        struct iovec iov;
	char buf[4096];
	char cbuf[4096];

	sk = socket(PF_NETLINK, SOCK_RAW, NETLINK_KOBJECT_UEVENT);
	if (sk < 0)
		return 1;

        addr.nl_family = AF_NETLINK;
        addr.nl_groups = 1;
        addr.nl_pid = 0;
	if (bind(sk, (struct sockaddr *) &addr, sizeof(addr)))
		return 1;

	if (setsockopt(sk, SOL_NETLINK, NETLINK_LISTEN_ALL_NSID, &val, sizeof(val)))
		return 1;


        memset(&msg, 0, sizeof(msg));
        memset(&addr, 0, sizeof(struct sockaddr_nl));
        msg.msg_namelen = 0;
        msg.msg_iov     = &iov;
        msg.msg_iovlen  = 1;
	msg.msg_name = &addr;
	msg.msg_namelen = sizeof(struct sockaddr_nl);
	msg.msg_control = cbuf;
	msg.msg_controllen = sizeof(cbuf);

	while (1) {
		iov.iov_base    = buf;
		iov.iov_len     = sizeof(buf);

		recvmsg(sk, &msg, 0);
		printf("Get an event\n");
	}

	return 0;
}