Imported Upstream version 1.4.5
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292
plugins/negate.c
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292
plugins/negate.c
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/******************************************************************************
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*
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* Nagios negate plugin
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*
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* License: GPL
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* Copyright (c) 2002-2006 nagios-plugins team
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*
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* Last Modified: $Date: 2006/10/19 23:53:28 $
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*
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* Description:
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*
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* This file contains the negate plugin
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*
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* Negates the status of a plugin (returns OK for CRITICAL, and vice-versa)
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*
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* License Information:
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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* $Id: negate.c,v 1.26 2006/10/19 23:53:28 opensides Exp $
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@@-<article>
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<sect1>
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<title>Quick Reference</title>
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<refentry>
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<refmeta><manvolnum>5<manvolnum></refmeta>
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<refnamdiv>
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<refname>&progname;</refname>
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<refpurpose>&SUMMARY;</refpurpose>
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</refnamdiv>
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</refentry>
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</sect1>
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<sect1>
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<title>FAQ</title>
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</sect1>
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<sect1>
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<title>Theory, Installation, and Operation</title>
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<sect2>
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<title>General Description</title>
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<para>
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&DESCRIPTION;
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</para>
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</sect2>
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<sect2>
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<title>Future Enhancements</title>
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<para>ToDo List</para>
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<itemizedlist>
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<listitem>Add option to do regex substitution in output text</listitem>
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</itemizedlist>
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</sect2>-@@
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******************************************************************************/
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const char *progname = "negate";
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const char *revision = "$Revision: 1.26 $";
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const char *copyright = "2002-2006";
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const char *email = "nagiosplug-devel@lists.sourceforge.net";
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#define DEFAULT_TIMEOUT 9
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#include "common.h"
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#include "utils.h"
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#include "popen.h"
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char *command_line;
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int process_arguments (int, char **);
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int validate_arguments (void);
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void print_help (void);
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void print_usage (void);
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int
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main (int argc, char **argv)
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{
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int found = 0, result = STATE_UNKNOWN;
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char *buf;
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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if (process_arguments (argc, argv) == ERROR)
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usage4 (_("Could not parse arguments"));
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/* Set signal handling and alarm */
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if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR)
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die (STATE_UNKNOWN, _("Cannot catch SIGALRM"));
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(void) alarm ((unsigned) timeout_interval);
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child_process = spopen (command_line);
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if (child_process == NULL)
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die (STATE_UNKNOWN, _("Could not open pipe: %s\n"), command_line);
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child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
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if (child_stderr == NULL) {
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printf (_("Could not open stderr for %s\n"), command_line);
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}
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buf = malloc(MAX_INPUT_BUFFER);
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while (fgets (buf, MAX_INPUT_BUFFER - 1, child_process)) {
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found++;
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printf ("%s", buf);
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}
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if (!found)
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die (STATE_UNKNOWN,
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_("%s problem - No data received from host\nCMD: %s\n"),\
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argv[0], command_line);
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/* close the pipe */
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result = spclose (child_process);
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/* WARNING if output found on stderr */
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if (fgets (buf, MAX_INPUT_BUFFER - 1, child_stderr))
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result = max_state (result, STATE_WARNING);
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/* close stderr */
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(void) fclose (child_stderr);
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if (result == STATE_OK)
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exit (STATE_CRITICAL);
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else if (result == STATE_CRITICAL)
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exit (EXIT_SUCCESS);
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else
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exit (result);
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}
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/******************************************************************************
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@@-
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<sect2>
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<title>Functions</title>
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<sect3>
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<title>process_arguments</title>
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<para>This function parses the command line into the needed
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variables.</para>
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<para>Aside from the standard 'help' and 'version' options, there
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is a only a 'timeout' option.</para>
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</sect3>
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-@@
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******************************************************************************/
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/* process command-line arguments */
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int
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process_arguments (int argc, char **argv)
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{
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int c;
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int option = 0;
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static struct option longopts[] = {
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{"help", no_argument, 0, 'h'},
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{"version", no_argument, 0, 'V'},
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{"timeout", required_argument, 0, 't'},
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{0, 0, 0, 0}
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};
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while (1) {
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c = getopt_long (argc, argv, "+hVt:",
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longopts, &option);
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if (c == -1 || c == EOF)
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break;
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switch (c) {
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case '?': /* help */
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usage2 (_("Unknown argument"), optarg);
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break;
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case 'h': /* help */
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print_help ();
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exit (EXIT_SUCCESS);
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break;
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case 'V': /* version */
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print_revision (progname, revision);
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exit (EXIT_SUCCESS);
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case 't': /* timeout period */
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if (!is_integer (optarg))
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usage2 (_("Timeout interval must be a positive integer"), optarg);
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else
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timeout_interval = atoi (optarg);
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break;
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}
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}
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asprintf (&command_line, "%s", argv[optind]);
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for (c = optind+1; c < argc; c++) {
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asprintf (&command_line, "%s %s", command_line, argv[c]);
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}
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return validate_arguments ();
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}
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/******************************************************************************
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@@-
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<sect3>
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<title>validate_arguments</title>
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<para>No validation is currently done.</para>
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</sect3>
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-@@
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******************************************************************************/
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int
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validate_arguments ()
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{
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if (command_line == NULL)
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return ERROR;
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return STATE_OK;
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}
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/******************************************************************************
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@@-
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</sect2>
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</sect1>
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</article>
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-@@
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******************************************************************************/
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void
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print_help (void)
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{
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print_revision (progname, revision);
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printf (COPYRIGHT, copyright, email);
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printf ("%s\n", _("Negates the status of a plugin (returns OK for CRITICAL, and vice-versa)."));
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printf ("\n\n");
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print_usage ();
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printf (_(UT_HELP_VRSN));
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printf (_(UT_TIMEOUT), DEFAULT_TIMEOUT);
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printf (" %s\n", _("[keep timeout than the plugin timeout to retain CRITICAL status]"));
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printf ("\n");
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printf ("%s\n", _("Examples:"));
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printf (" %s\n", "negate \"/usr/local/nagios/libexec/check_ping -H host\"");
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printf (" %s\n", _("Run check_ping and invert result. Must use full path to plugin"));
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printf (" %s\n", "negate \"/usr/local/nagios/libexec/check_procs -a 'vi negate.c'\"");
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printf (" %s\n", _("Use single quotes if you need to retain spaces"));
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printf (_(UT_VERBOSE));
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printf ("\n");
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printf ("%s\n", _("Notes:"));
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printf ("%s\n", _("This plugin is a wrapper to take the output of another plugin and invert it."));
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printf ("%s\n", _("If the wrapped plugin returns STATE_OK, the wrapper will return STATE_CRITICAL."));
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printf ("%s\n", _("If the wrapped plugin returns STATE_CRITICAL, the wrapper will return STATE_OK."));
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printf ("%s\n", _("Otherwise, the output state of the wrapped plugin is unchanged."));
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printf (_(UT_SUPPORT));
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}
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void
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print_usage (void)
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{
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printf (_("Usage:"));
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printf ("%s [-t timeout] <definition of wrapped plugin>\n",progname);
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}
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