Initial revision

1 files changed, 288 insertions, 0 deletions

diff --git a/vtysh/vtysh_main.c b/vtysh/vtysh_main.c
new file mode 100644
index 00000000..f30aba43
--- /dev/null
+++ b/vtysh/vtysh_main.c
@@ -0,0 +1,288 @@
+/* Virtual terminal interface shell.
+ * Copyright (C) 2000 Kunihiro Ishiguro
+ *
+ * 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.  
+ */
+
+#include <zebra.h>
+
+#include <sys/un.h>
+#include <setjmp.h>
+#include <sys/wait.h>
+#include <pwd.h>
+
+#include <readline/readline.h>
+#include <readline/history.h>
+
+#include "version.h"
+#include "getopt.h"
+#include "command.h"
+
+#include "vtysh/vtysh.h"
+#include "vtysh/vtysh_user.h"
+
+/* VTY shell program name. */
+char *progname;
+
+/* Configuration file name.  Usually this is configurable, but vtysh
+   has static configuration file only.  */
+char *config_file = NULL;
+
+/* Configuration file and directory. */
+char *config_current = NULL;
+char config_default[] = SYSCONFDIR VTYSH_DEFAULT_CONFIG;
+
+/* Integrated configuration file. */
+char *integrate_file = NULL;
+char *integrate_current = NULL;
+#if 0
+char integrate_default[] = SYSCONFDIR INTEGRATE_DEFAULT_CONFIG;
+#endif
+
+/* Flag for indicate executing child command. */
+int execute_flag = 0;
+
+/* For sigsetjmp() & siglongjmp(). */
+static sigjmp_buf jmpbuf;
+
+/* Flag for avoid recursive siglongjmp() call. */
+static int jmpflag = 0;
+
+/* A static variable for holding the line. */
+static char *line_read;
+
+/* Master of threads. */
+struct thread_master *master;
+
+/* SIGTSTP handler.  This function care user's ^Z input. */
+void
+sigtstp (int sig)
+{
+  /* Execute "end" command. */
+  vtysh_execute ("end");
+  
+  /* Initialize readline. */
+  rl_initialize ();
+  printf ("\n");
+
+  /* Check jmpflag for duplicate siglongjmp(). */
+  if (! jmpflag)
+    return;
+
+  jmpflag = 0;
+
+  /* Back to main command loop. */
+  siglongjmp (jmpbuf, 1);
+}
+
+/* SIGINT handler.  This function care user's ^Z input.  */
+void
+sigint (int sig)
+{
+  /* Check this process is not child process. */
+  if (! execute_flag)
+    {
+      rl_initialize ();
+      printf ("\n");
+      rl_forced_update_display ();
+    }
+}
+
+/* Signale wrapper. */
+RETSIGTYPE *
+signal_set (int signo, void (*func)(int))
+{
+  int ret;
+  struct sigaction sig;
+  struct sigaction osig;
+
+  sig.sa_handler = func;
+  sigemptyset (&sig.sa_mask);
+  sig.sa_flags = 0;
+#ifdef SA_RESTART
+  sig.sa_flags |= SA_RESTART;
+#endif /* SA_RESTART */
+
+  ret = sigaction (signo, &sig, &osig);
+
+  if (ret < 0) 
+    return (SIG_ERR);
+  else
+    return (osig.sa_handler);
+}
+
+/* Initialization of signal handles. */
+void
+signal_init ()
+{
+  signal_set (SIGINT, sigint);
+  signal_set (SIGTSTP, sigtstp);
+  signal_set (SIGPIPE, SIG_IGN);
+}
+
+/* Help information display. */
+static void
+usage (int status)
+{
+  if (status != 0)
+    fprintf (stderr, "Try `%s --help' for more information.\n", progname);
+  else
+    {    
+      printf ("Usage : %s [OPTION...]\n\n\
+Daemon which manages kernel routing table management and \
+redistribution between different routing protocols.\n\n\
+-b, --boot               Execute boot startup configuration\n\
+-e, --eval               Execute argument as command\n\
+-h, --help               Display this help and exit\n\
+\n\
+Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
+    }
+  exit (status);
+}
+
+/* VTY shell options, we use GNU getopt library. */
+struct option longopts[] = 
+{
+  { "boot",                no_argument,             NULL, 'b'},
+  { "eval",                 required_argument,       NULL, 'e'},
+  { "help",                 no_argument,             NULL, 'h'},
+  { 0 }
+};
+
+/* Read a string, and return a pointer to it.  Returns NULL on EOF. */
+char *
+vtysh_rl_gets ()
+{
+  /* If the buffer has already been allocated, return the memory
+     to the free pool. */
+  if (line_read)
+    {
+      free (line_read);
+      line_read = NULL;
+    }
+     
+  /* Get a line from the user.  Change prompt according to node.  XXX. */
+  line_read = readline (vtysh_prompt ());
+     
+  /* If the line has any text in it, save it on the history. */
+  if (line_read && *line_read)
+    add_history (line_read);
+     
+  return (line_read);
+}
+
+/* VTY shell main routine. */
+int
+main (int argc, char **argv, char **env)
+{
+  char *p;
+  int opt;
+  int eval_flag = 0;
+  int boot_flag = 0;
+  char *eval_line = NULL;
+  char *integrated_file = NULL;
+
+  /* Preserve name of myself. */
+  progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
+
+  /* Option handling. */
+  while (1) 
+    {
+      opt = getopt_long (argc, argv, "be:h", longopts, 0);
+    
+      if (opt == EOF)
+	break;
+
+      switch (opt) 
+	{
+	case 0:
+	  break;
+	case 'b':
+	  boot_flag = 1;
+	  break;
+	case 'e':
+	  eval_flag = 1;
+	  eval_line = optarg;
+	  break;
+	case 'h':
+	  usage (0);
+	  break;
+	case 'i':
+	  integrated_file = strdup (optarg);
+	default:
+	  usage (1);
+	  break;
+	}
+    }
+
+  /* Initialize user input buffer. */
+  line_read = NULL;
+
+  /* Signal and others. */
+  signal_init ();
+
+  /* Make vty structure and register commands. */
+  vtysh_init_vty ();
+  vtysh_init_cmd ();
+  vtysh_user_init ();
+  vtysh_config_init ();
+
+  vty_init_vtysh ();
+
+  sort_node ();
+
+  vtysh_connect_all ();
+
+  /* Read vtysh configuration file. */
+  vtysh_read_config (config_file, config_current, config_default);
+
+  /* If eval mode */
+  if (eval_flag)
+    {
+      vtysh_execute_no_pager (eval_line);
+      exit (0);
+    }
+  
+  /* Boot startup configuration file. */
+  if (boot_flag)
+    {
+      vtysh_read_config (integrate_file, integrate_current, integrate_default);
+      exit (0);
+    }
+
+  vtysh_pager_init ();
+
+  vtysh_readline_init ();
+
+  vty_hello (vty);
+
+  vtysh_auth ();
+
+  /* Preparation for longjmp() in sigtstp(). */
+  sigsetjmp (jmpbuf, 1);
+  jmpflag = 1;
+
+  /* Main command loop. */
+  while (vtysh_rl_gets ())
+    vtysh_execute (line_read);
+
+  printf ("\n");
+
+  /* Rest in peace. */
+  exit (0);
+}