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 = 0;
44 int crit_percent = 0;
45 unsigned long long warn_size = 0;
46 unsigned long long crit_size = 0;
47 int verbose;
48 int allswaps;
50 int
51 main (int argc, char **argv)
52 {
53 int percent_used, percent;
54 unsigned long long total_swap = 0, used_swap = 0, free_swap = 0;
55 unsigned long long dsktotal, dskused, dskfree, tmp;
56 int result = STATE_OK;
57 char input_buffer[MAX_INPUT_BUFFER];
58 char *perf;
59 #ifdef HAVE_PROC_MEMINFO
60 FILE *fp;
61 #else
62 # ifdef HAVE_SWAP
63 int conv_factor; /* Convert to MBs */
64 char *temp_buffer;
65 char *swap_command;
66 char *swap_format;
67 # endif
68 #endif
69 char str[32];
70 char *status;
72 setlocale (LC_ALL, "");
73 bindtextdomain (PACKAGE, LOCALEDIR);
74 textdomain (PACKAGE);
76 status = strdup ("");
77 perf = strdup ("");
79 if (process_arguments (argc, argv) != OK)
80 usage (_("Invalid command arguments supplied\n"));
82 #ifdef HAVE_PROC_MEMINFO
83 fp = fopen (PROC_MEMINFO, "r");
84 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
85 if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%*[:] %llu %llu %llu", &dsktotal, &dskused, &dskfree) == 3) {
86 dsktotal = dsktotal / 1048576;
87 dskused = dskused / 1048576;
88 dskfree = dskfree / 1048576;
89 total_swap += dsktotal;
90 used_swap += dskused;
91 free_swap += dskfree;
92 if (allswaps) {
93 if (dsktotal == 0)
94 percent=100.0;
95 else
96 percent = 100 * (((double) dskused) / ((double) dsktotal));
97 result = max_state (result, check_swap (percent, dskfree));
98 if (verbose)
99 asprintf (&status, "%s [%llu (%d%%)]", status, dskfree, 100 - percent);
100 }
101 }
102 else if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%[TotalFre]%*[:] %llu %*[k]%*[B]", str, &tmp)) {
103 if (strcmp ("Total", str) == 0) {
104 dsktotal = tmp / 1024;
105 }
106 else if (strcmp ("Free", str) == 0) {
107 dskfree = tmp / 1024;
108 }
109 }
110 }
111 fclose(fp);
112 dskused = dsktotal - dskfree;
113 total_swap = dsktotal;
114 used_swap = dskused;
115 free_swap = dskfree;
116 #else
117 # ifdef HAVE_SWAP
118 asprintf(&swap_command, "%s", SWAP_COMMAND);
119 asprintf(&swap_format, "%s", SWAP_FORMAT);
120 conv_factor = SWAP_CONVERSION;
122 /* These override the command used if a summary (and thus ! allswaps) is required */
123 /* The summary flag returns more accurate information about swap usage on these OSes */
124 # ifdef _AIX
125 if (!allswaps) {
126 asprintf(&swap_command, "%s", "/usr/sbin/lsps -s");
127 asprintf(&swap_format, "%s", "%d%*s %d");
128 conv_factor = 1;
129 }
130 # else
131 # ifdef sun
132 if (!allswaps) {
133 asprintf(&swap_command, "%s", "/usr/sbin/swap -s");
134 asprintf(&swap_format, "%s", "%*s %*dk %*s %*s + %*dk %*s = %dk %*s %dk %*s");
135 conv_factor = 2048;
136 }
137 # endif
138 # endif
140 if (verbose >= 2)
141 printf (_("Command: %s\n"), swap_command);
142 if (verbose >= 3)
143 printf (_("Format: %s\n"), swap_format);
145 child_process = spopen (swap_command);
146 if (child_process == NULL) {
147 printf (_("Could not open pipe: %s\n"), swap_command);
148 return STATE_UNKNOWN;
149 }
151 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
152 if (child_stderr == NULL)
153 printf (_("Could not open stderr for %s\n"), swap_command);
155 sprintf (str, "%s", "");
156 /* read 1st line */
157 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
158 if (strcmp (swap_format, "") == 0) {
159 temp_buffer = strtok (input_buffer, " \n");
160 while (temp_buffer) {
161 if (strstr (temp_buffer, "blocks"))
162 sprintf (str, "%s %s", str, "%f");
163 else if (strstr (temp_buffer, "dskfree"))
164 sprintf (str, "%s %s", str, "%f");
165 else
166 sprintf (str, "%s %s", str, "%*s");
167 temp_buffer = strtok (NULL, " \n");
168 }
169 }
171 /* If different swap command is used for summary switch, need to read format differently */
172 # ifdef _AIX
173 if (!allswaps) {
174 fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process); /* Ignore first line */
175 sscanf (input_buffer, swap_format, &total_swap, &used_swap);
176 free_swap = total_swap * (100 - used_swap) /100;
177 used_swap = total_swap - free_swap;
178 if (verbose >= 3)
179 printf (_("total=%d, used=%d, free=%d\n"), total_swap, used_swap, free_swap);
180 } else {
181 # else
182 # ifdef sun
183 if (!allswaps) {
184 sscanf (input_buffer, swap_format, &used_swap, &free_swap);
185 used_swap = used_swap / 1024;
186 free_swap = free_swap / 1024;
187 total_swap = used_swap + free_swap;
188 } else {
189 # endif
190 # endif
191 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
192 sscanf (input_buffer, swap_format, &dsktotal, &dskfree);
194 dsktotal = dsktotal / conv_factor;
195 /* AIX lists percent used, so this converts to dskfree in MBs */
196 # ifdef _AIX
197 dskfree = dsktotal * (100 - dskfree) / 100;
198 # else
199 dskfree = dskfree / conv_factor;
200 # endif
201 if (verbose >= 3)
202 printf (_("total=%d, free=%d\n"), dsktotal, dskfree);
204 dskused = dsktotal - dskfree;
205 total_swap += dsktotal;
206 used_swap += dskused;
207 free_swap += dskfree;
208 if (allswaps) {
209 percent = 100 * (((double) dskused) / ((double) dsktotal));
210 result = max_state (result, check_swap (percent, dskfree));
211 if (verbose)
212 asprintf (&status, "%s [%llu (%d%%)]", status, dskfree, 100 - percent);
213 }
214 }
215 # ifdef _AIX
216 }
217 # else
218 # ifdef sun
219 }
220 # endif
221 # endif
223 /* If we get anything on STDERR, at least set warning */
224 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
225 result = max_state (result, STATE_WARNING);
227 /* close stderr */
228 (void) fclose (child_stderr);
230 /* close the pipe */
231 if (spclose (child_process))
232 result = max_state (result, STATE_WARNING);
233 # endif /* HAVE_SWAP */
234 #endif /* HAVE_PROC_MEMINFO */
236 percent_used = 100 * ((double) used_swap) / ((double) total_swap);
237 result = max_state (result, check_swap (percent_used, free_swap));
238 asprintf (&status, _(" %d%% free (%llu MB out of %llu MB)%s"),
239 (100 - percent_used), free_swap, total_swap, status);
241 asprintf (&perf, "%s", perfdata ("swap", (long) free_swap, "MB",
242 TRUE, (long) max (warn_size/1024, warn_percent/100.0*total_swap),
243 TRUE, (long) max (crit_size/1024, crit_percent/100.0*total_swap),
244 TRUE, 0,
245 TRUE, (long) total_swap));
246 printf ("SWAP %s:%s |%s\n", state_text (result), status, perf);
247 return result;
248 }
252 \f
253 int
254 check_swap (int usp, long unsigned int free_swap)
255 {
256 int result = STATE_UNKNOWN;
257 free_swap = free_swap * 1024; /* Convert back to bytes as warn and crit specified in bytes */
258 if (usp >= 0 && crit_percent != 0 && usp >= (100.0 - crit_percent))
259 result = STATE_CRITICAL;
260 else if (crit_size > 0 && free_swap <= crit_size)
261 result = STATE_CRITICAL;
262 else if (usp >= 0 && warn_percent != 0 && usp >= (100.0 - warn_percent))
263 result = STATE_WARNING;
264 else if (warn_size > 0 && free_swap <= warn_size)
265 result = STATE_WARNING;
266 else if (usp >= 0.0)
267 result = STATE_OK;
268 return result;
269 }
272 /* process command-line arguments */
273 int
274 process_arguments (int argc, char **argv)
275 {
276 int c = 0; /* option character */
278 int option = 0;
279 static struct option longopts[] = {
280 {"warning", required_argument, 0, 'w'},
281 {"critical", required_argument, 0, 'c'},
282 {"allswaps", no_argument, 0, 'a'},
283 {"verbose", no_argument, 0, 'v'},
284 {"version", no_argument, 0, 'V'},
285 {"help", no_argument, 0, 'h'},
286 {0, 0, 0, 0}
287 };
289 if (argc < 2)
290 return ERROR;
292 while (1) {
293 c = getopt_long (argc, argv, "+?Vvhac:w:", longopts, &option);
295 if (c == -1 || c == EOF)
296 break;
298 switch (c) {
299 case 'w': /* warning size threshold */
300 if (is_intnonneg (optarg)) {
301 warn_size = atoi (optarg);
302 break;
303 }
304 else if (strstr (optarg, ",") &&
305 strstr (optarg, "%") &&
306 sscanf (optarg, "%llu,%d%%", &warn_size, &warn_percent) == 2) {
307 break;
308 }
309 else if (strstr (optarg, "%") &&
310 sscanf (optarg, "%d%%", &warn_percent) == 1) {
311 break;
312 }
313 else {
314 usage (_("Warning threshold must be integer or percentage!\n"));
315 }
316 case 'c': /* critical size threshold */
317 if (is_intnonneg (optarg)) {
318 crit_size = atoi (optarg);
319 break;
320 }
321 else if (strstr (optarg, ",") &&
322 strstr (optarg, "%") &&
323 sscanf (optarg, "%llu,%d%%", &crit_size, &crit_percent) == 2) {
324 break;
325 }
326 else if (strstr (optarg, "%") &&
327 sscanf (optarg, "%d%%", &crit_percent) == 1) {
328 break;
329 }
330 else {
331 usage (_("Critical threshold must be integer or percentage!\n"));
332 }
333 case 'a': /* all swap */
334 allswaps = TRUE;
335 break;
336 case 'v': /* verbose */
337 verbose++;
338 break;
339 case 'V': /* version */
340 print_revision (progname, revision);
341 exit (STATE_OK);
342 case 'h': /* help */
343 print_help ();
344 exit (STATE_OK);
345 case '?': /* error */
346 usage (_("Invalid argument\n"));
347 }
348 }
350 c = optind;
351 if (c == argc)
352 return validate_arguments ();
353 if (warn_percent == 0 && is_intnonneg (argv[c]))
354 warn_percent = atoi (argv[c++]);
356 if (c == argc)
357 return validate_arguments ();
358 if (crit_percent == 0 && is_intnonneg (argv[c]))
359 crit_percent = atoi (argv[c++]);
361 if (c == argc)
362 return validate_arguments ();
363 if (warn_size == 0 && is_intnonneg (argv[c]))
364 warn_size = atoi (argv[c++]);
366 if (c == argc)
367 return validate_arguments ();
368 if (crit_size == 0 && is_intnonneg (argv[c]))
369 crit_size = atoi (argv[c++]);
371 return validate_arguments ();
372 }
378 int
379 validate_arguments (void)
380 {
381 if (warn_percent == 0 && crit_percent == 0 && warn_size == 0
382 && crit_size == 0) {
383 return ERROR;
384 }
385 else if (warn_percent < crit_percent) {
386 usage
387 (_("Warning percentage should be more than critical percentage\n"));
388 }
389 else if (warn_size < crit_size) {
390 usage
391 (_("Warning free space should be more than critical free space\n"));
392 }
393 return OK;
394 }
400 \f
401 void
402 print_help (void)
403 {
404 print_revision (progname, revision);
406 printf (_(COPYRIGHT), copyright, email);
408 printf (_("Check swap space on local server.\n\n"));
410 print_usage ();
412 printf (_(UT_HELP_VRSN));
414 printf (_("\n\
415 -w, --warning=INTEGER\n\
416 Exit with WARNING status if less than INTEGER bytes of swap space are free\n\
417 -w, --warning=PERCENT%%\n\
418 Exit with WARNING status if less than PERCENT of swap space is free\n\
419 -c, --critical=INTEGER\n\
420 Exit with CRITICAL status if less than INTEGER bytes of swap space are free\n\
421 -c, --critical=PERCENT%%\n\
422 Exit with CRITCAL status if less than PERCENT of swap space is free\n\
423 -a, --allswaps\n\
424 Conduct comparisons for all swap partitions, one by one\n\
425 -v, --verbose\n\
426 Verbose output. Up to 3 levels\n"));
428 printf (_("\n\
429 On Solaris, if -a specified, uses swap -l, otherwise uses swap -s.\n\
430 Will be discrepencies because swap -s counts allocated swap and includes\n\
431 real memory\n"));
432 printf (_("\n\
433 On AIX, if -a is specified, uses lsps -a, otherwise uses lsps -s.\n"));
435 printf (_(UT_SUPPORT));
436 }
441 void
442 print_usage (void)
443 {
444 printf (_("Usage:\n\
445 %s [-av] -w <percent_free>%% -c <percent_free>%%\n\
446 %s [-av] -w <bytes_free> -c <bytes_free>\n\
447 %s (-h | --help) for detailed help\n\
448 %s (-V | --version) for version information\n"),
449 progname, progname, progname, progname);
450 }