1 files changed, 78 insertions, 0 deletions
diff --git a/libc/inet/rpc/bindresvport.c b/libc/inet/rpc/bindresvport.c
new file mode 100644
index 000000000..71803dd41
--- /dev/null
+++ b/libc/inet/rpc/bindresvport.c
@@ -0,0 +1,78 @@
+static  char sccsid[] = "@(#)bindresvport.c	2.2 88/07/29 4.0 RPCSRC 1.8 88/02/08 SMI";
+/*
+ * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
+ * unrestricted use provided that this legend is included on all tape
+ * media and as a part of the software program in whole or part.  Users
+ * may copy or modify Sun RPC without charge, but are not authorized
+ * to license or distribute it to anyone else except as part of a product or
+ * program developed by the user.
+ * 
+ * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
+ * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
+ * 
+ * Sun RPC is provided with no support and without any obligation on the
+ * part of Sun Microsystems, Inc. to assist in its use, correction,
+ * modification or enhancement.
+ * 
+ * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
+ * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
+ * OR ANY PART THEREOF.
+ * 
+ * In no event will Sun Microsystems, Inc. be liable for any lost revenue
+ * or profits or other special, indirect and consequential damages, even if
+ * Sun has been advised of the possibility of such damages.
+ * 
+ * Sun Microsystems, Inc.
+ * 2550 Garcia Avenue
+ * Mountain View, California  94043
+ */
+
+/*
+ * Copyright (c) 1987 by Sun Microsystems, Inc.
+ */
+
+#include <sys/types.h>
+#include <sys/errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+/*
+ * Bind a socket to a privileged IP port
+ */
+bindresvport(sd, sin)
+	int sd;
+	struct sockaddr_in *sin;
+{
+	int res;
+	static short port;
+	struct sockaddr_in myaddr;
+	extern int errno;
+	int i;
+
+#define STARTPORT 600
+#define ENDPORT (IPPORT_RESERVED - 1)
+#define NPORTS	(ENDPORT - STARTPORT + 1)
+
+	if (sin == (struct sockaddr_in *)0) {
+		sin = &myaddr;
+		bzero(sin, sizeof (*sin));
+		sin->sin_family = AF_INET;
+	} else if (sin->sin_family != AF_INET) {
+		errno = EPFNOSUPPORT;
+		return (-1);
+	}
+	if (port == 0) {
+		port = (getpid() % NPORTS) + STARTPORT;
+	}
+	res = -1;
+	errno = EADDRINUSE;
+	for (i = 0; i < NPORTS && res < 0 && errno == EADDRINUSE; i++) {
+		sin->sin_port = htons(port++);
+		if (port > ENDPORT) {
+			port = STARTPORT;
+		}
+		res = bind(sd, sin, sizeof(struct sockaddr_in));
+	}
+	return (res);
+}