1#include <sys/socket.h>
 2#include <fcntl.h>
 3#include <errno.h>
 4#include "syscall.h"
 5
 6int socketpair(int domain, int type, int protocol, int fd[2])
 7{
 8	int r = socketcall(socketpair, domain, type, protocol, fd, 0, 0);
 9	if (r<0 && (errno==EINVAL || errno==EPROTONOSUPPORT)
10	    && (type&(SOCK_CLOEXEC|SOCK_NONBLOCK))) {
11		r = socketcall(socketpair, domain,
12			type & ~(SOCK_CLOEXEC|SOCK_NONBLOCK),
13			protocol, fd, 0, 0);
14		if (r < 0) return r;
15		if (type & SOCK_CLOEXEC) {
16			__syscall(SYS_fcntl, fd[0], F_SETFD, FD_CLOEXEC);
17			__syscall(SYS_fcntl, fd[1], F_SETFD, FD_CLOEXEC);
18		}
19		if (type & SOCK_NONBLOCK) {
20			__syscall(SYS_fcntl, fd[0], F_SETFL, O_NONBLOCK);
21			__syscall(SYS_fcntl, fd[1], F_SETFL, O_NONBLOCK);
22		}
23	}
24	return r;
25}