1 /******************************************************************************
2 *
3 * Program: Swap space plugin 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 * Copyright (c) 2000 Karl DeBisschop (kdebisschop@users.sourceforge.net)
23 *
24 * $Id$
25 *
26 *****************************************************************************/
28 #include "common.h"
29 #include "popen.h"
30 #include "utils.h"
32 const char *progname = "check_swap";
33 const char *revision = "$Revision$";
34 const char *copyright = "2000-2003";
35 const char *email = "nagiosplug-devel@lists.sourceforge.net";
37 int check_swap (int usp, long unsigned int free_swap);
38 int process_arguments (int argc, char **argv);
39 int validate_arguments (void);
40 void print_usage (void);
41 void print_help (void);
43 int warn_percent = 200;
44 int crit_percent = 200;
45 long unsigned int warn_size = 0;
46 long unsigned int crit_size = 0;
47 int verbose;
48 int allswaps;
50 #if !defined(sun)
51 int sun = 0; /* defined by compiler if it is a sun solaris system */
52 #endif
54 int
55 main (int argc, char **argv)
56 {
57 int percent_used, percent;
58 long unsigned int total_swap = 0, used_swap = 0, free_swap = 0;
59 long unsigned int dsktotal, dskused, dskfree;
60 int result = STATE_OK;
61 char input_buffer[MAX_INPUT_BUFFER];
62 #ifdef HAVE_PROC_MEMINFO
63 FILE *fp;
64 #else
65 # ifdef HAVE_SWAP
66 int conv_factor; /* Convert to MBs */
67 char *temp_buffer;
68 char *swap_command;
69 char *swap_format;
70 # endif
71 #endif
72 char str[32];
73 char *status;
75 setlocale (LC_ALL, "");
76 bindtextdomain (PACKAGE, LOCALEDIR);
77 textdomain (PACKAGE);
79 status = strdup("");
81 if (process_arguments (argc, argv) != OK)
82 usage (_("Invalid command arguments supplied\n"));
84 #ifdef HAVE_PROC_MEMINFO
85 fp = fopen (PROC_MEMINFO, "r");
86 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
87 if (sscanf (input_buffer, " %s %lu %lu %lu", str, &dsktotal, &dskused, &dskfree) == 4 &&
88 strstr (str, "Swap")) {
89 dsktotal = dsktotal / 1048576;
90 dskused = dskused / 1048576;
91 dskfree = dskfree / 1048576;
92 total_swap += dsktotal;
93 used_swap += dskused;
94 free_swap += dskfree;
95 if (allswaps) {
96 percent = 100 * (((double) dskused) / ((double) dsktotal));
97 result = max_state (result, check_swap (percent, dskfree));
98 if (verbose)
99 asprintf (&status, "%s [%lu (%d%%)]", status, dskfree, 100 - percent);
100 }
101 }
102 }
103 fclose(fp);
104 #else
105 # ifdef HAVE_SWAP
106 if (!allswaps && sun) {
107 asprintf(&swap_command, "%s", "/usr/sbin/swap -s");
108 asprintf(&swap_format, "%s", "%*s %*dk %*s %*s + %*dk %*s = %dk %*s %dk %*s");
109 conv_factor = 2048;
110 } else {
111 asprintf(&swap_command, "%s", SWAP_COMMAND);
112 asprintf(&swap_format, "%s", SWAP_FORMAT);
113 conv_factor = SWAP_CONVERSION;
114 }
116 if (verbose >= 2)
117 printf (_("Command: %s\n"), swap_command);
118 if (verbose >= 3)
119 printf (_("Format: %s\n"), swap_format);
121 child_process = spopen (swap_command);
122 if (child_process == NULL) {
123 printf (_("Could not open pipe: %s\n"), swap_command);
124 return STATE_UNKNOWN;
125 }
127 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
128 if (child_stderr == NULL)
129 printf (_("Could not open stderr for %s\n"), swap_command);
131 sprintf (str, "%s", "");
132 /* read 1st line */
133 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
134 if (strcmp (swap_format, "") == 0) {
135 temp_buffer = strtok (input_buffer, " \n");
136 while (temp_buffer) {
137 if (strstr (temp_buffer, "blocks"))
138 sprintf (str, "%s %s", str, "%f");
139 else if (strstr (temp_buffer, "dskfree"))
140 sprintf (str, "%s %s", str, "%f");
141 else
142 sprintf (str, "%s %s", str, "%*s");
143 temp_buffer = strtok (NULL, " \n");
144 }
145 }
147 if (!allswaps && sun) {
148 sscanf (input_buffer, swap_format, &used_swap, &free_swap);
149 used_swap = used_swap / 1024;
150 free_swap = free_swap / 1024;
151 total_swap = used_swap + free_swap;
152 } else {
153 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
154 sscanf (input_buffer, swap_format, &dsktotal, &dskfree);
156 dsktotal = dsktotal / conv_factor;
157 dskfree = dskfree / conv_factor;
158 if (verbose >= 3)
159 printf (_("total=%d, free=%d\n"), dsktotal, dskfree);
161 dskused = dsktotal - dskfree;
162 total_swap += dsktotal;
163 used_swap += dskused;
164 free_swap += dskfree;
165 if (allswaps) {
166 percent = 100 * (((double) dskused) / ((double) dsktotal));
167 result = max_state (result, check_swap (percent, dskfree));
168 if (verbose)
169 asprintf (&status, "%s [%lu (%d%%)]", status, dskfree, 100 - percent);
170 }
171 }
172 }
173 /* If we get anything on STDERR, at least set warning */
174 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
175 result = max_state (result, STATE_WARNING);
177 /* close stderr */
178 (void) fclose (child_stderr);
180 /* close the pipe */
181 if (spclose (child_process))
182 result = max_state (result, STATE_WARNING);
183 # endif
184 #endif
186 percent_used = 100 * ((double) used_swap) / ((double) total_swap);
187 result = max_state (result, check_swap (percent_used, free_swap));
188 asprintf (&status, _(" %d%% free (%lu MB out of %lu MB)%s"),
189 (100 - percent_used), free_swap, total_swap, status);
191 die (result, "SWAP %s:%s\n", state_text (result), status);
192 return STATE_UNKNOWN;
193 }
197 \f
198 int
199 check_swap (int usp, long unsigned int free_swap)
200 {
201 int result = STATE_UNKNOWN;
202 if (usp >= 0 && usp >= (100.0 - crit_percent))
203 result = STATE_CRITICAL;
204 else if (crit_size > 0 && free_swap <= crit_size)
205 result = STATE_CRITICAL;
206 else if (usp >= 0 && usp >= (100.0 - warn_percent))
207 result = STATE_WARNING;
208 else if (warn_size > 0 && free_swap <= warn_size)
209 result = STATE_WARNING;
210 else if (usp >= 0.0)
211 result = STATE_OK;
212 return result;
213 }
216 /* process command-line arguments */
217 int
218 process_arguments (int argc, char **argv)
219 {
220 int c = 0; /* option character */
222 int option = 0;
223 static struct option longopts[] = {
224 {"warning", required_argument, 0, 'w'},
225 {"critical", required_argument, 0, 'c'},
226 {"allswaps", no_argument, 0, 'a'},
227 {"verbose", no_argument, 0, 'v'},
228 {"version", no_argument, 0, 'V'},
229 {"help", no_argument, 0, 'h'},
230 {0, 0, 0, 0}
231 };
233 if (argc < 2)
234 return ERROR;
236 while (1) {
237 c = getopt_long (argc, argv, "+?Vvhac:w:", longopts, &option);
239 if (c == -1 || c == EOF)
240 break;
242 switch (c) {
243 case 'w': /* warning size threshold */
244 if (is_intnonneg (optarg)) {
245 warn_size = atoi (optarg);
246 break;
247 }
248 else if (strstr (optarg, ",") &&
249 strstr (optarg, "%") &&
250 sscanf (optarg, "%lu,%d%%", &warn_size, &warn_percent) == 2) {
251 break;
252 }
253 else if (strstr (optarg, "%") &&
254 sscanf (optarg, "%d%%", &warn_percent) == 1) {
255 break;
256 }
257 else {
258 usage (_("Warning threshold must be integer or percentage!\n"));
259 }
260 case 'c': /* critical size threshold */
261 if (is_intnonneg (optarg)) {
262 crit_size = atoi (optarg);
263 break;
264 }
265 else if (strstr (optarg, ",") &&
266 strstr (optarg, "%") &&
267 sscanf (optarg, "%lu,%d%%", &crit_size, &crit_percent) == 2) {
268 break;
269 }
270 else if (strstr (optarg, "%") &&
271 sscanf (optarg, "%d%%", &crit_percent) == 1) {
272 break;
273 }
274 else {
275 usage (_("Critical threshold must be integer or percentage!\n"));
276 }
277 case 'a': /* all swap */
278 allswaps = TRUE;
279 break;
280 case 'v': /* verbose */
281 verbose++;
282 break;
283 case 'V': /* version */
284 print_revision (progname, revision);
285 exit (STATE_OK);
286 case 'h': /* help */
287 print_help ();
288 exit (STATE_OK);
289 case '?': /* help */
290 usage (_("Invalid argument\n"));
291 }
292 }
294 c = optind;
295 if (c == argc)
296 return validate_arguments ();
297 if (warn_percent > 100 && is_intnonneg (argv[c]))
298 warn_percent = atoi (argv[c++]);
300 if (c == argc)
301 return validate_arguments ();
302 if (crit_percent > 100 && is_intnonneg (argv[c]))
303 crit_percent = atoi (argv[c++]);
305 if (c == argc)
306 return validate_arguments ();
307 if (warn_size == 0 && is_intnonneg (argv[c]))
308 warn_size = atoi (argv[c++]);
310 if (c == argc)
311 return validate_arguments ();
312 if (crit_size == 0 && is_intnonneg (argv[c]))
313 crit_size = atoi (argv[c++]);
315 return validate_arguments ();
316 }
322 int
323 validate_arguments (void)
324 {
325 if (warn_percent > 100 && crit_percent > 100 && warn_size == 0
326 && crit_size == 0) {
327 return ERROR;
328 }
329 else if (warn_percent < crit_percent) {
330 usage
331 (_("Warning percentage should be more than critical percentage\n"));
332 }
333 else if (warn_size < crit_size) {
334 usage
335 (_("Warning free space should be more than critical free space\n"));
336 }
337 return OK;
338 }
344 \f
345 void
346 print_help (void)
347 {
348 print_revision (progname, revision);
350 printf (_(COPYRIGHT), copyright, email);
352 printf (_("Check swap space on local server.\n\n"));
354 print_usage ();
356 printf (_(UT_HELP_VRSN));
358 printf (_("\n\
359 -w, --warning=INTEGER\n\
360 Exit with WARNING status if less than INTEGER bytes of swap space are free\n\
361 -w, --warning=PERCENT%%\n\
362 Exit with WARNING status if less than PERCENT of swap space has been used\n\
363 -c, --critical=INTEGER\n\
364 Exit with CRITICAL status if less than INTEGER bytes of swap space are free\n\
365 -c, --critical=PERCENT%%\n\
366 Exit with CRITCAL status if less than PERCENT of swap space has been used\n\
367 -a, --allswaps\n\
368 Conduct comparisons for all swap partitions, one by one\n"));
370 #ifdef sun
371 printf (_("\n\
372 On Solaris, if -a specified, uses swap -l, otherwise uses swap -s.\n\
373 Will be discrepencies because swap -s counts allocated swap and includes\n\
374 real memory\n"));
375 #endif
377 printf (_(UT_SUPPORT));
378 }
383 void
384 print_usage (void)
385 {
386 printf (_("Usage:\n\
387 %s [-a] -w <used_percentage>%% -c <used_percentage>%%\n\
388 %s [-a] -w <bytes_free> -c <bytes_free>\n\
389 %s (-h | --help) for detailed help\n\
390 %s (-V | --version) for version information\n"),
391 progname, progname, progname, progname);
392 }