xref: /freebsd/contrib/mandoc/test-cmsg.c (revision cddbc3b40812213ff00041f79174cac0be360a2a)
1 #include <stddef.h>
2 #include <sys/socket.h>
3 
4 int
5 main(void)
6 {
7 	struct msghdr	 msg;
8 
9 	msg.msg_control = NULL;
10 	msg.msg_controllen = 0;
11 
12 	return CMSG_FIRSTHDR(&msg) != NULL;
13 }
14