Initial revision
diff --git a/vtysh/vtysh_main.c b/vtysh/vtysh_main.c
new file mode 100644
index 0000000..f30aba4
--- /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);
+}