* dtable.cc (dtable::vfork_parent_restore): Add debugging statement.

* exceptions.cc (try_to_debug): Spin only as long as we don't have a debugger
attached.
* fhandler.h (fhandler_base::set_nohandle): New method.
(fhandler_base::get_nohandle): New method.
* fhandler.cc (fhandler_base::dup): Avoid duplicating handle if there is no
handle.
* fhandler_disk_file.cc (fhandler_disk_file::opendir): Set nohandle flag on
dummy fd.
* Makefile.in: Make intermediate library for eventual inclusion in libcygwin.a
* fhandler.h (fhandler_pipe::fhandler_pipe): Remove default argument setting
since it is no longer used.
* miscfuncs.cc (check_null_str): New function.
(+check_null_str_errno): Ditto.
* net.cc: Add defensive buffer checking throughout.
(cygwin_sendto): Protect against invalid fd.
(cygwin_recvfrom): Ditto.
(cygwin_getpeername): Ditto.
(cygwin_recv): Ditto.
(cygwin_send): Ditto.
* winsup.h: Declare a new function.
* select.cc (set_bits): Fix conditional for setting fd in exceptfds.
* dtable.cc (dtable::build_fhandler): Create fhandler_pipe using correct device
type.
* path.cc (get_devn): Set correct pipe device type from device name.

winsup/cygwin/dtable.cc

@@ -18,6 +18,7 @@ details. */
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/cygwin.h>
+#include <assert.h>
 
 #define USE_SYS_TYPES_FD_SET
 #include <winsock.h>
@@ -292,7 +293,7 @@ dtable::build_fhandler (int fd, DWORD dev, const char *name, int unit)
       case FH_PIPE:
       case FH_PIPER:
       case FH_PIPEW:
-	fh = cnew (fhandler_pipe) ();
+	fh = cnew (fhandler_pipe) (dev);
 	break;
       case FH_SOCKET:
 	if ((fh = cnew (fhandler_socket) ()))
@@ -591,6 +592,7 @@ dtable::vfork_parent_restore ()
 
   close_all_files ();
   fhandler_base **deleteme = fds;
+  assert (fds_on_hold != NULL);
   fds = fds_on_hold;
   fds_on_hold = NULL;
   cfree (deleteme);