Initial commit to seed the "pipework" branchex10p

This is a major revision of the command processing, in order to support
new lexical level for command lines, plus all the necessary I/O
redirection for the pipes.

This is version 0.99.15ex10p.

This supports:

  < filename
  <+ filename
  ....   > filename
  ....   >> filename
  ....   >*

Also contains all lexical level handling of '...', "...." and \x in order
to allow use of '>' et al if required.

Updated command line completion and help is a work in progress.

1 files changed, 193 insertions, 0 deletions

diff --git a/lib/vty_local.h b/lib/vty_local.h
new file mode 100644
index 00000000..2767f9d3
--- /dev/null
+++ b/lib/vty_local.h
@@ -0,0 +1,193 @@
+/* VTY top level
+ * Copyright (C) 1997, 98 Kunihiro Ishiguro
+ *
+ * Revisions: Copyright (C) 2010 Chris Hall (GMCH), Highwayman
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Zebra; see the file COPYING.  If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+#ifndef _ZEBRA_VTY_LOCAL_H
+#define _ZEBRA_VTY_LOCAL_H
+
+#include "vty_common.h"         /* First and foremost                   */
+#include "command_common.h"
+
+#include "vargs.h"
+
+#include "qpthreads.h"
+#include "qpnexus.h"
+#include "thread.h"
+
+/*==============================================================================
+ * This is for access to some things in vty.c which are not required
+ * by external users, who use vty.h.
+ *
+ * This is for use within the command/vty family.
+ *
+ * Should not be used with vty.h !  (Except in vty.c itself.)
+ *
+ * This may duplicate things published in vty.h, but also includes things
+ * which are not intended for "external" use.
+ */
+
+/*==============================================================================
+ * The VTYSH uses a unix socket to talk to the daemon.
+ *
+ * The ability to respond to a connection from VTYSH appears to be a *compile*
+ * time option.  In the interests of keeping the code up to date, the VTYSH
+ * option is turned into a testable constant.
+ */
+#ifdef VTYSH
+  enum { VTYSH_ENABLED = true  } ;
+#else
+  enum { VTYSH_ENABLED = false } ;
+#endif
+
+/*==============================================================================
+ * Variables in vty.c -- used in any of the family
+ */
+extern struct vty_io* vio_list_base ;
+extern struct vty_io* vio_monitors_base ;
+extern struct vty_io* vio_death_watch ;
+
+extern struct thread_master* vty_master ;
+
+extern bool vty_nexus ;
+
+extern qpn_nexus vty_cli_nexus ;
+extern qpn_nexus vty_cmd_nexus ;
+
+/*==============================================================================
+ * To make vty qpthread safe we use a single mutex.
+ *
+ * vty and log recurse through each other, so the same mutex is used
+ * for both, i.e. they are treated as being part of the same monitor.
+ *
+ * A recursive mutex is used.  This simplifies the calling from log to vty and
+ * back again.  It also allows for the vty internals to call each other.
+ *
+ * There are some "uty" functions which assume the mutex is locked.
+ *
+ * vty is closely bound to the command handling -- the main vty structure
+ * contains the context in which commands are parsed and executed.
+ */
+
+extern qpt_mutex_t vty_mutex ;
+
+#ifdef  NDEBUG
+# define  VTY_DEBUG 0           /* NDEBUG override                      */
+#else
+# ifndef  VTY_DEBUG
+#  define VTY_DEBUG 1           /* Set to 1 to turn on debug checks     */
+# endif
+#endif
+
+#if VTY_DEBUG
+
+extern int vty_lock_count ;
+extern int vty_assert_fail ;
+
+#endif
+
+Inline void
+VTY_LOCK(void)          /* if is qpthreads_enabled, lock vty_mutex      */
+{
+  qpt_mutex_lock(&vty_mutex) ;
+  if (VTY_DEBUG)
+    ++vty_lock_count ;
+} ;
+
+Inline void
+VTY_UNLOCK(void)        /* if is qpthreads_enabled, unlock vty_mutex    */
+{
+  if (VTY_DEBUG)
+    --vty_lock_count ;
+  qpt_mutex_unlock(&vty_mutex) ;
+} ;
+
+Inline bool             /* true => is (effectively) cli thread          */
+vty_is_cli_thread(void)
+{
+  return !qpthreads_enabled || qpt_thread_is_self(vty_cli_nexus->thread_id) ;
+} ;
+
+/* For debug (and documentation) purposes, will VTY_ASSERT_LOCKED where that
+ * is required.
+ *
+ * In some cases, need also to be running in the CLI thread as well.
+ *
+ * Note that both these checks will pass if !qpthreads_enabled.  So can have
+ * code which is called before qpthreads are started up, or which will never
+ * run qpthreaded !
+ */
+#if VTY_DEBUG
+
+Inline void
+VTY_ASSERT_FAILED(void)
+{
+  if (vty_assert_fail == 0) ;
+    {
+      vty_assert_fail = 1 ;
+      assert(0) ;
+    } ;
+} ;
+
+Inline void
+VTY_ASSERT_LOCKED(void)
+{
+  if ((vty_lock_count == 0) && (qpthreads_enabled))
+    VTY_ASSERT_FAILED() ;
+} ;
+
+Inline void
+VTY_ASSERT_CLI_THREAD(void)
+{
+  if (!vty_is_cli_thread())
+    VTY_ASSERT_FAILED() ;
+} ;
+
+#else
+
+#define VTY_ASSERT_LOCKED()
+#define VTY_ASSERT_CLI_THREAD()
+
+#endif
+
+/*==============================================================================
+ * Functions in vty.c -- used in any of the family
+ */
+extern int vty_out (vty vty, const char* format, ...) PRINTF_ATTRIBUTE(2, 3);
+extern int vty_out_indent(vty vty, int indent) ;
+extern void vty_out_clear(vty vty) ;
+
+extern void vty_set_lines(vty vty, int lines);
+
+extern bool vty_close(vty vty, bool final, qstring reason) ;
+
+extern void vty_open_config_write(vty vty, int fd) ;
+extern int vty_close_config_write(vty vty) ;
+
+extern void vty_log_fixed (const char *buf, size_t len);
+
+struct logline ;        /* forward reference    */
+struct zlog ;           /* forward reference    */
+
+extern void uty_log (struct logline* ll, struct zlog *zl, int priority,
+                                                const char *format, va_list va);
+
+#endif /* _ZEBRA_VTY_LOCAL_H */