1 files changed, 31 insertions, 0 deletions
diff --git a/sendfd.c b/sendfd.c
new file mode 100644
index 0000000..ca26265
--- /dev/null
+++ b/sendfd.c
@@ -0,0 +1,31 @@
+/* See LICENSE file for copyright and license details. */
+#include "libsimple.h"
+
+
+int
+libsimple_sendfd(int sock, int fd)
+{
+	char buf[1];
+	struct iovec iov;
+	struct msghdr msg;
+	struct cmsghdr *cmsg;
+	char cms[CMSG_SPACE(sizeof(fd))];
+
+	buf[0] = 0;
+	iov.iov_base = buf;
+	iov.iov_len = 1;
+
+	memset(&msg, 0, sizeof(msg));
+	msg.msg_iov = &iov;
+	msg.msg_iovlen = 1;
+	msg.msg_control = (caddr_t)cms;
+	msg.msg_controllen = CMSG_LEN(sizeof(fd));
+
+	cmsg = CMSG_FIRSTHDR(&msg);
+	cmsg->cmsg_len = CMSG_LEN(sizeof(fd));
+	cmsg->cmsg_level = SOL_SOCKET;
+	cmsg->cmsg_type = SCM_RIGHTS;
+	memcpy(CMSG_DATA(cmsg), &fd, sizeof(fd));
+
+	return -(sendmsg(sock, &msg, 0) != (ssize_t)iov.iov_len);
+}