Use pipe(2) if descriptors are selectable.

configure.in

@@ -639,7 +639,7 @@ dnl hopefully we won't include too many libraries
 
 dnl require select
 AC_CHECK_FUNC(select, :, AC_MSG_ERROR([select() required.]))
-AC_CHECK_FUNCS(socketpair)
+dnl AC_CHECK_FUNCS(socketpair)
 
 dnl Select arg types
 dnl (if this detection becomes permenent, it and the select() detection
@@ -647,7 +647,7 @@ dnl should be done before the yielding select test)
 AC_FUNC_SELECT_ARGTYPES
 
 dnl check to see if system call automatically restart
-AC_SYS_RESTARTABLE_SYSCALLS
+dnl AC_SYS_RESTARTABLE_SYSCALLS
 
 dnl require POSIX regex
 AC_CHECK_HEADERS( regex.h )
@@ -1838,6 +1838,7 @@ AC_CHECK_FUNCS(		\
 	memcpy			\
 	memmove			\
 	mkstemp			\
+	pipe			\
 	read			\
 	recv			\
 	recvfrom		\

include/ac/socket.h

@@ -115,8 +115,8 @@ extern char* WSAGetErrorString LDAP_P((int));
 #	define tcp_read( s, buf, len)	read( s, buf, len )
 #	define tcp_write( s, buf, len)	write( s, buf, len )
 
-#ifdef HAVE_PAIR
-#define USE_PAIR HAVE_PAIR
+#ifdef HAVE_PIPE
+#define USE_PIPE HAVE_PIPE
 #endif
 
 #endif /* MACOS */

include/portable.h.in

@@ -34,10 +34,6 @@
 /* Define if you don't have vprintf but do have _doprnt.  */
 #undef HAVE_DOPRNT
 
-/* Define if system calls automatically restart after interruption
-   by a signal.  */
-#undef HAVE_RESTARTABLE_SYSCALLS
-
 /* Define if your struct stat has st_blksize.  */
 #undef HAVE_ST_BLKSIZE
 
@@ -217,6 +213,9 @@
 /* Define if you have the mkstemp function.  */
 #undef HAVE_MKSTEMP
 
+/* Define if you have the pipe function.  */
+#undef HAVE_PIPE
+
 /* Define if you have the pthread_getconcurrency function.  */
 #undef HAVE_PTHREAD_GETCONCURRENCY
 
@@ -277,9 +276,6 @@
 /* Define if you have the snprintf function.  */
 #undef HAVE_SNPRINTF
 
-/* Define if you have the socketpair function.  */
-#undef HAVE_SOCKETPAIR
-
 /* Define if you have the strdup function.  */
 #undef HAVE_STRDUP
 

libraries/liblutil/sockpair.c

@@ -20,6 +20,9 @@
 
 int lutil_pair( LBER_SOCKET_T sds[2] )
 {
+#ifdef USE_PIPE
+	return pipe( sds );
+#else
 	struct sockaddr_in si;
 	int rc, len = sizeof(si);
 	LBER_SOCKET_T sd;
@@ -53,4 +56,5 @@ int lutil_pair( LBER_SOCKET_T sds[2] )
 
 	sds[0] = sds[1] = sd;
 	return 0;
+#endif
 }