Added lutil_pair()

libraries/liblutil/Makefile.in

@@ -4,9 +4,9 @@
 
 LIBRARY	= liblutil.a
 SRCS	= base64.c debug.c detach.c \
-	md5.c passwd.c sha1.c getpass.c lockf.c utils.c
+	md5.c passwd.c sha1.c getpass.c lockf.c utils.c sockpair.c
 OBJS	= base64.o debug.o detach.o \
-	md5.o passwd.o sha1.o getpass.o lockf.o utils.o \
+	md5.o passwd.o sha1.o getpass.o lockf.o utils.o sockpair.o \
 	@LIBOBJS@
 
 LDAP_INCDIR= ../../include       

libraries/liblutil/sockpair.c

+/*
+ * Copyright 1998-1999 The OpenLDAP Foundation, All Rights Reserved.
+ * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
+ */
+
+#include "portable.h"
+
+#include <ac/socket.h>
+
+/* Return a pair of descriptors that are connected to each other. The
+ * returned descriptors are suitable for use with select(). The two
+ * descriptors may or may not be identical; the function may return
+ * the same descriptor number in both slots. It is guaranteed that
+ * data written on fds[1] will be readable on fds[0]. The returned
+ * descriptors may be datagram oriented, so data should be written
+ * in reasonably small pieces and read all at once. On Unix systems
+ * this function is best implemented using a single pipe() call.
+ */
+int lutil_pair( int fds[2] )
+{
+	struct sockaddr_in si;
+	int rc, len = sizeof(si);
+	int fd;
+
+	fd = socket( AF_INET, SOCK_DGRAM, 0 );
+	if (fd < 0)
+		return fd;
+	
+	(void) memset( (void*) &si, 0, len );
+	si.sin_family = AF_INET;
+	si.sin_port = 0;
+	si.sin_addr.s_addr = htonl( INADDR_LOOPBACK );
+
+	if ( rc = bind( fd, (struct sockaddr *)&si, len ) )
+	{
+fail:		tcp_close(fd);
+		return rc;
+	}
+	if ( rc = getsockname( fd, (struct sockaddr *)&si, &len ) )
+		goto fail;
+	if ( rc = connect( fd, (struct sockaddr *)&si, len ) )
+		goto fail;
+	fds[0] = fds[1] = fd;
+	return 0;
+}