uevent.c

#include <stdio.h>
#include <arpa/inet.h>
#include <linux/netlink.h>
#include <netlink/netlink.h>
#include <linux/filter.h>
#include <sys/stat.h>
#include <sys/socket.h>

//#include "xxd.c"

int main() {
  int s=socket(PF_NETLINK,SOCK_RAW,NETLINK_KOBJECT_UEVENT);
  struct sockaddr_nl snl;
  struct msghdr mh;
  struct iovec iov;
  ssize_t buflen;
  unsigned char buf[1024];

  if(-1==s) {
    perror("socket");
    return 1;
  }
  snl.nl_family=AF_NETLINK;
  snl.nl_groups=1|2;
  if(-1==bind(s,(struct sockaddr *)&snl,sizeof(snl))) {
    perror("bind");
    return 1;
  }
  while(1) {
    iov.iov_base=&buf;
    iov.iov_len=sizeof(buf);
    memset(&mh,0,sizeof(mh));
    mh.msg_iov=&iov;
    mh.msg_iovlen=1;
    mh.msg_name=&snl;
    mh.msg_namelen=sizeof(snl);
    buflen=recvmsg(s,&mh,0);
    printf("%s\n", buf);
//    xxd(buf,buflen);
  }
  return 0;
}