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cli.c

/*-
 * Copyright (c) 2006 Verdens Gang AS
 * Copyright (c) 2006 Linpro AS
 * All rights reserved.
 *
 * Author: Poul-Henning Kamp <phk@phk.freebsd.dk>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: cli.c 1096 2006-09-20 07:50:27Z des $
 *
 * Stuff for handling the CLI protocol
 */

#include <ctype.h>
#include <string.h>
#include <stdio.h>

#include <cli.h>
#include <cli_priv.h>
#include <libvarnish.h>

/*
 * Generic help function.
 *
 * priv must point to cli_proto array
 */

void
cli_func_help(struct cli *cli, char **av, void *priv)
{
      struct cli_proto *cp;

      if (av[2] == NULL) {
            cli_out(cli, "Available commands:\n");
            for (cp = priv; cp->request != NULL; cp++)
                  cli_out(cli, "%s\n", cp->syntax);
            return;
      }
      for (cp = priv; cp->request != NULL; cp++) {
            if (!strcmp(cp->request, av[2])) {
                  cli_out(cli, "%s\n%s\n", cp->syntax, cp->help);
                  return;
            }
      }
      cli_param(cli);
}

void
cli_dispatch(struct cli *cli, struct cli_proto *clp, const char *line)
{
      char **av;
      unsigned u;
      struct cli_proto *cp;

      cli_result(cli, CLIS_OK);
      /* XXX: syslog commands */
      av = ParseArgv(line, 0);
      do {
            if (av[0] != NULL) {
                  cli_out(cli, "Syntax Error: %s\n", av[0]);
                  cli_result(cli, CLIS_SYNTAX);
                  break;
            }
            if (av[1] == NULL)
                  break;
            if (isupper(av[1][0])) {
                  cli_out(cli,
                      "all commands are in lower-case.\n");
                  cli_result(cli, CLIS_UNKNOWN);
                  break;
            }
            for (cp = clp; cp->request != NULL; cp++)
                  if (!strcmp(av[1], cp->request))
                        break;
            if (cp->request == NULL) {
                  cli_out(cli,
                      "Unknown request, type 'help' for more info.\n");
                  cli_result(cli, CLIS_UNKNOWN);
                  break;
            }

            if (cp->func == NULL) {
                  cli_out(cli, "Unimplemented\n");
                  cli_result(cli, CLIS_UNIMPL);
                  break;
            }

            for (u = 0; u <= cp->minarg; u++) {
                  if (av[u + 1] != NULL)
                        continue;
                  cli_out(cli, "Too few parameters\n");
                  cli_result(cli, CLIS_TOOFEW);
                  break;
            }
            if (u <= cp->minarg)
                  break;
            for (; u <= cp->maxarg; u++)
                  if (av[u + 1] == NULL)
                        break;
            if (av[u + 1] != NULL) {
                  cli_out(cli, "Too many parameters\n");
                  cli_result(cli, CLIS_TOOMANY);
                  break;
            }

            cp->func(cli, av, cp->priv);

      } while (0);
      FreeArgv(av);
}

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