b6effe399facbc30477bc1c100a42380c50d97ee
1 /******************************************************************************
2 *
3 * Program: Inverting plugin wrapper for Nagios
4 * License: GPL
5 *
6 * License Information:
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 *
22 * $Id$
23 *
24 *****************************************************************************/
26 #define PROGNAME "negate"
27 #define REVISION "$Revision$"
28 #define COPYRIGHT "2002"
29 #define AUTHOR "Karl DeBisschop"
30 #define EMAIL "kdebisschop@users.sourceforge.net"
31 #define SUMMARY "Negates the status of a plugin (returns OK for CRITICAL, and vice-versa).\n"
33 #define OPTIONS "\
34 \[-t timeout] <definition of wrapped plugin>"
36 #define LONGOPTIONS "\
37 -t, --timeout=INTEGER\n\
38 Terminate test if timeout limit is exceeded (default: %d)\n\
39 [keep this less than the plugin timeout to retain CRITICAL status]\n"
41 #define DESCRIPTION "\
42 This plugin is a wrapper to take the output of another plugin and invert it.\n\
43 If the wrapped plugin returns STATE_OK, the wrapper will return STATE_CRITICAL.\n\
44 If the wrapped plugin returns STATE_CRITICAL, the wrapper will return STATE_OK.\n\
45 Otherwise, the output state of the wrapped plugin is unchanged.\n"
47 #define DEFAULT_TIMEOUT 9
49 #include "common.h"
50 #include "utils.h"
51 #include "popen.h"
53 char *command_line;
55 static int process_arguments (int, char **);
56 static int validate_arguments (void);
57 static void print_usage (void);
58 static void print_help (void);
59 \f
60 /******************************************************************************
62 The (psuedo?)literate programming XML is contained within \@\@\- <XML> \-\@\@
63 tags in the comments. With in the tags, the XML is assembled sequentially.
64 You can define entities in tags. You also have all the #defines available as
65 entities.
67 Please note that all tags must be lowercase to use the DocBook XML DTD.
69 @@-<article>
71 <sect1>
72 <title>Quick Reference</title>
73 <!-- The refentry forms a manpage -->
74 <refentry>
75 <refmeta>
76 <manvolnum>5<manvolnum>
77 </refmeta>
78 <refnamdiv>
79 <refname>&PROGNAME;</refname>
80 <refpurpose>&SUMMARY;</refpurpose>
81 </refnamdiv>
82 </refentry>
83 </sect1>
85 <sect1>
86 <title>FAQ</title>
87 </sect1>
89 <sect1>
90 <title>Theory, Installation, and Operation</title>
92 <sect2>
93 <title>General Description</title>
94 <para>
95 &DESCRIPTION;
96 </para>
97 </sect2>
99 <sect2>
100 <title>Future Enhancements</title>
101 <para>ToDo List</para>
102 <itemizedlist>
103 <listitem>Add option to do regex substitution in output text</listitem>
104 </itemizedlist>
105 </sect2>
108 <sect2>
109 <title>Functions</title>
110 -@@
111 ******************************************************************************/
113 int
114 main (int argc, char **argv)
115 {
116 int found = 0, result = STATE_UNKNOWN;
117 char input_buffer[MAX_INPUT_BUFFER];
119 if (process_arguments (argc, argv) == ERROR)
120 usage ("Could not parse arguments");
122 /* Set signal handling and alarm */
123 if (signal (SIGALRM, timeout_alarm_handler) == SIG_ERR) {
124 printf ("Cannot catch SIGALRM");
125 return STATE_UNKNOWN;
126 }
127 alarm (timeout_interval);
129 child_process = spopen (command_line);
130 if (child_process == NULL) {
131 printf ("Could not open pipe: %s\n", command_line);
132 exit (STATE_UNKNOWN);
133 }
135 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
136 if (child_stderr == NULL) {
137 printf ("Could not open stderr for %s\n", command_line);
138 }
140 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
141 found++;
142 if (index (input_buffer, '\n')) {
143 input_buffer[strcspn (input_buffer, "\n")] = 0;
144 printf ("%s\n", input_buffer);
145 }
146 else {
147 printf ("%s\n", input_buffer);
148 }
149 }
151 if (!found) {
152 printf ("%s problem - No data recieved from host\nCMD: %s\n", argv[0],
153 command_line);
154 exit (STATE_UNKNOWN);
155 }
157 /* close the pipe */
158 result = spclose (child_process);
160 /* WARNING if output found on stderr */
161 if (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
162 result = max_state (result, STATE_WARNING);
164 /* close stderr */
165 (void) fclose (child_stderr);
167 if (result == STATE_OK)
168 return STATE_CRITICAL;
169 else if (result == STATE_CRITICAL)
170 return STATE_OK;
171 else
172 return result;
173 }
174 \f
178 void
179 print_help (void)
180 {
181 print_revision (PROGNAME, REVISION);
182 printf
183 ("Copyright (c) %s %s <%s>\n\n%s\n",
184 COPYRIGHT, AUTHOR, EMAIL, SUMMARY);
185 print_usage ();
186 printf
187 ("\nOptions:\n" LONGOPTIONS "\n" DESCRIPTION "\n",
188 DEFAULT_TIMEOUT);
189 support ();
190 }
192 void
193 print_usage (void)
194 {
195 printf ("Usage:\n" " %s %s\n"
196 #ifdef HAVE_GETOPT_H
197 " %s (-h | --help) for detailed help\n"
198 " %s (-V | --version) for version information\n",
199 #else
200 " %s -h for detailed help\n"
201 " %s -V for version information\n",
202 #endif
203 PROGNAME, OPTIONS, PROGNAME, PROGNAME);
204 }
205 \f
208 /******************************************************************************
209 @@-
210 <sect3>
211 <title>process_arguments</title>
213 <para>This function parses the command line into the needed
214 variables.</para>
216 <para>Aside from the standard 'help' and 'version' options, there
217 is a only a 'timeout' option.No validation is currently done.</para>
219 </sect3>
220 -@@
221 ******************************************************************************/
223 /* process command-line arguments */
224 int
225 process_arguments (int argc, char **argv)
226 {
227 int c;
229 #ifdef HAVE_GETOPT_H
230 int option_index = 0;
231 static struct option long_options[] = {
232 {"help", no_argument, 0, 'h'},
233 {"version", no_argument, 0, 'V'},
234 {"timeout", required_argument, 0, 't'},
235 {0, 0, 0, 0}
236 };
237 #endif
239 while (1) {
240 #ifdef HAVE_GETOPT_H
241 c = getopt_long (argc, argv, "+?hVt:",
242 long_options, &option_index);
243 #else
244 c = getopt (argc, argv, "+?hVt:");
245 #endif
246 if (c == -1 || c == EOF)
247 break;
249 switch (c) {
250 case '?': /* help */
251 usage2 ("Unknown argument", optarg);
252 case 'h': /* help */
253 print_help ();
254 exit (STATE_OK);
255 case 'V': /* version */
256 print_revision (PROGNAME, REVISION);
257 exit (STATE_OK);
258 case 't': /* timeout period */
259 if (!is_integer (optarg))
260 usage2 ("Timeout Interval must be an integer", optarg);
261 timeout_interval = atoi (optarg);
262 break;
263 }
264 }
266 command_line = strscpy (command_line, argv[optind]);
267 for (c = optind+1; c <= argc; c++) {
268 command_line = ssprintf (command_line, "%s %s", command_line, argv[c]);
269 }
271 return validate_arguments ();
272 }
275 /******************************************************************************
276 @@-
277 <sect3>
278 <title>validate_arguments</title>
280 <para>No validation is currently done.</para>
282 </sect3>
283 -@@
284 ******************************************************************************/
286 int
287 validate_arguments ()
288 {
289 return OK;
290 }
291 \f
293 /******************************************************************************
294 @@-
295 </sect2>
296 </sect1>
297 </article>
298 -@@
299 ******************************************************************************/