github.com/afumu/libc@v0.0.6/musl/src/network/sockatmark.c (about)

     1  #include <sys/socket.h>
     2  #include <sys/ioctl.h>
     3  
     4  int sockatmark(int s)
     5  {
     6  	int ret;
     7  	if (ioctl(s, SIOCATMARK, &ret) < 0)
     8  		return -1;
     9  	return ret;
    10  }