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 const char *progname = "check_swap";
29 const char *revision = "$Revision$";
30 const char *copyright = "2000-2004";
31 const char *email = "nagiosplug-devel@lists.sourceforge.net";
33 #include "common.h"
34 #include "popen.h"
35 #include "utils.h"
37 int check_swap (int usp, float 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 double warn_size = 0;
46 double crit_size = 0;
47 int verbose;
48 int allswaps;
50 int
51 main (int argc, char **argv)
52 {
53 int percent_used, percent;
54 float total_swap = 0, used_swap = 0, free_swap = 0;
55 float dsktotal = 0, dskused = 0, dskfree = 0, tmp = 0;
56 int result = STATE_UNKNOWN;
57 char input_buffer[MAX_INPUT_BUFFER];
58 #ifdef HAVE_PROC_MEMINFO
59 FILE *fp;
60 #else
61 int conv_factor = SWAP_CONVERSION;
62 # ifdef HAVE_SWAP
63 char *temp_buffer;
64 char *swap_command;
65 char *swap_format;
66 # else
67 # ifdef HAVE_DECL_SWAPCTL
68 int i=0, nswaps=0, swapctl_res=0;
69 # ifdef CHECK_SWAP_SWAPCTL_SVR4
70 swaptbl_t *tbl=NULL;
71 swapent_t *ent=NULL;
72 # else
73 # ifdef CHECK_SWAP_SWAPCTL_BSD
74 struct swapent *ent;
75 # endif /* CHECK_SWAP_SWAPCTL_BSD */
76 # endif /* CHECK_SWAP_SWAPCTL_SVR4 */
77 # endif /* HAVE_DECL_SWAPCTL */
78 # endif
79 #endif
80 char str[32];
81 char *status;
83 setlocale (LC_ALL, "");
84 bindtextdomain (PACKAGE, LOCALEDIR);
85 textdomain (PACKAGE);
87 status = strdup ("");
89 if (process_arguments (argc, argv) == ERROR)
90 usage4 (_("Could not parse arguments"));
92 #ifdef HAVE_PROC_MEMINFO
93 fp = fopen (PROC_MEMINFO, "r");
94 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
95 if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%*[:] %f %f %f", &dsktotal, &dskused, &dskfree) == 3) {
96 dsktotal = dsktotal / 1048576;
97 dskused = dskused / 1048576;
98 dskfree = dskfree / 1048576;
99 total_swap += dsktotal;
100 used_swap += dskused;
101 free_swap += dskfree;
102 if (allswaps) {
103 if (dsktotal == 0)
104 percent=100.0;
105 else
106 percent = 100 * (((double) dskused) / ((double) dsktotal));
107 result = max_state (result, check_swap (percent, dskfree));
108 if (verbose)
109 asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
110 }
111 }
112 else if (sscanf (input_buffer, "%*[S]%*[w]%*[a]%*[p]%[TotalFre]%*[:] %f %*[k]%*[B]", str, &tmp)) {
113 if (strcmp ("Total", str) == 0) {
114 dsktotal = tmp / 1024;
115 }
116 else if (strcmp ("Free", str) == 0) {
117 dskfree = tmp / 1024;
118 }
119 }
120 }
121 fclose(fp);
122 dskused = dsktotal - dskfree;
123 total_swap = dsktotal;
124 used_swap = dskused;
125 free_swap = dskfree;
126 #else
127 # ifdef HAVE_SWAP
128 asprintf(&swap_command, "%s", SWAP_COMMAND);
129 asprintf(&swap_format, "%s", SWAP_FORMAT);
131 /* These override the command used if a summary (and thus ! allswaps) is required */
132 /* The summary flag returns more accurate information about swap usage on these OSes */
133 # ifdef _AIX
134 if (!allswaps) {
135 asprintf(&swap_command, "%s", "/usr/sbin/lsps -s");
136 asprintf(&swap_format, "%s", "%f%*s %f");
137 conv_factor = 1;
138 }
139 # endif
141 if (verbose >= 2)
142 printf (_("Command: %s\n"), swap_command);
143 if (verbose >= 3)
144 printf (_("Format: %s\n"), swap_format);
146 child_process = spopen (swap_command);
147 if (child_process == NULL) {
148 printf (_("Could not open pipe: %s\n"), swap_command);
149 return STATE_UNKNOWN;
150 }
152 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
153 if (child_stderr == NULL)
154 printf (_("Could not open stderr for %s\n"), swap_command);
156 sprintf (str, "%s", "");
157 /* read 1st line */
158 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
159 if (strcmp (swap_format, "") == 0) {
160 temp_buffer = strtok (input_buffer, " \n");
161 while (temp_buffer) {
162 if (strstr (temp_buffer, "blocks"))
163 sprintf (str, "%s %s", str, "%f");
164 else if (strstr (temp_buffer, "dskfree"))
165 sprintf (str, "%s %s", str, "%f");
166 else
167 sprintf (str, "%s %s", str, "%*s");
168 temp_buffer = strtok (NULL, " \n");
169 }
170 }
172 /* If different swap command is used for summary switch, need to read format differently */
173 # ifdef _AIX
174 if (!allswaps) {
175 fgets(input_buffer, MAX_INPUT_BUFFER - 1, child_process); /* Ignore first line */
176 sscanf (input_buffer, swap_format, &total_swap, &used_swap);
177 free_swap = total_swap * (100 - used_swap) /100;
178 used_swap = total_swap - free_swap;
179 if (verbose >= 3)
180 printf (_("total=%.0f, used=%.0f, free=%.0f\n"), total_swap, used_swap, free_swap);
181 } else {
182 # endif
183 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process)) {
184 sscanf (input_buffer, swap_format, &dsktotal, &dskfree);
186 dsktotal = dsktotal / conv_factor;
187 /* AIX lists percent used, so this converts to dskfree in MBs */
188 # ifdef _AIX
189 dskfree = dsktotal * (100 - dskfree) / 100;
190 # else
191 dskfree = dskfree / conv_factor;
192 # endif
193 if (verbose >= 3)
194 printf (_("total=%.0f, free=%.0f\n"), dsktotal, dskfree);
196 dskused = dsktotal - dskfree;
197 total_swap += dsktotal;
198 used_swap += dskused;
199 free_swap += dskfree;
200 if (allswaps) {
201 percent = 100 * (((double) dskused) / ((double) dsktotal));
202 result = max_state (result, check_swap (percent, dskfree));
203 if (verbose)
204 asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
205 }
206 }
207 # ifdef _AIX
208 }
209 # endif
211 /* If we get anything on STDERR, at least set warning */
212 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_stderr))
213 result = max_state (result, STATE_WARNING);
215 /* close stderr */
216 (void) fclose (child_stderr);
218 /* close the pipe */
219 if (spclose (child_process))
220 result = max_state (result, STATE_WARNING);
221 # else
222 # ifdef CHECK_SWAP_SWAPCTL_SVR4
224 /* get the number of active swap devices */
225 nswaps=swapctl(SC_GETNSWP, NULL);
227 /* initialize swap table + entries */
228 tbl=(swaptbl_t*)malloc(sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
229 memset(tbl, 0, sizeof(swaptbl_t)+(sizeof(swapent_t)*nswaps));
230 tbl->swt_n=nswaps;
231 for(i=0;i<nswaps;i++){
232 ent=&tbl->swt_ent[i];
233 ent->ste_path=(char*)malloc(sizeof(char)*MAXPATHLEN);
234 }
236 /* and now, tally 'em up */
237 swapctl_res=swapctl(SC_LIST, tbl);
238 if(swapctl_res < 0){
239 perror(_("swapctl failed: "));
240 result = STATE_WARNING;
241 }
243 for(i=0;i<nswaps;i++){
244 dsktotal = (float) tbl->swt_ent[i].ste_pages / SWAP_CONVERSION;
245 dskfree = (float) tbl->swt_ent[i].ste_free / SWAP_CONVERSION;
246 dskused = ( dsktotal - dskfree );
248 if (verbose >= 3)
249 printf ("dsktotal=%.0f dskfree=%.0f dskused=%.0f\n", dsktotal, dskfree, dskused);
251 if(allswaps && dsktotal > 0){
252 percent = 100 * (((double) dskused) / ((double) dsktotal));
253 result = max_state (result, check_swap (percent, dskfree));
254 if (verbose) {
255 asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
256 }
257 }
259 total_swap += dsktotal;
260 free_swap += dskfree;
261 used_swap += dskused;
262 }
264 /* and clean up after ourselves */
265 for(i=0;i<nswaps;i++){
266 free(tbl->swt_ent[i].ste_path);
267 }
268 free(tbl);
269 # else
270 # ifdef CHECK_SWAP_SWAPCTL_BSD
272 /* get the number of active swap devices */
273 nswaps=swapctl(SWAP_NSWAP, NULL, 0);
275 /* initialize swap table + entries */
276 ent=(struct swapent*)malloc(sizeof(struct swapent)*nswaps);
278 /* and now, tally 'em up */
279 swapctl_res=swapctl(SWAP_STATS, ent, nswaps);
280 if(swapctl_res < 0){
281 perror(_("swapctl failed: "));
282 result = STATE_WARNING;
283 }
285 for(i=0;i<nswaps;i++){
286 dsktotal = (float) ent->se_nblks / conv_factor;
287 dskused = (float) ent->se_inuse / conv_factor;
288 dskfree = ( dsktotal - dskused );
290 if(allswaps && dsktotal > 0){
291 percent = 100 * (((double) dskused) / ((double) dsktotal));
292 result = max_state (result, check_swap (percent, dskfree));
293 if (verbose) {
294 asprintf (&status, "%s [%.0f (%d%%)]", status, dskfree, 100 - percent);
295 }
296 }
298 total_swap += dsktotal;
299 free_swap += dskfree;
300 used_swap += dskused;
301 }
303 /* and clean up after ourselves */
304 free(ent);
306 # endif /* CHECK_SWAP_SWAPCTL_BSD */
307 # endif /* CHECK_SWAP_SWAPCTL_SVR4 */
308 # endif /* HAVE_SWAP */
309 #endif /* HAVE_PROC_MEMINFO */
311 /* if total_swap == 0, let's not divide by 0 */
312 if(total_swap) {
313 percent_used = 100 * ((double) used_swap) / ((double) total_swap);
314 } else {
315 percent_used = 0;
316 }
318 result = max_state (result, check_swap (percent_used, free_swap));
319 printf (_("SWAP %s - %d%% free (%.0f MB out of %.0f MB) %s|"),
320 state_text (result),
321 (100 - percent_used), free_swap, total_swap, status);
323 puts (perfdata ("swap", (long) free_swap, "MB",
324 TRUE, (long) max (warn_size/1024, warn_percent/100.0*total_swap),
325 TRUE, (long) max (crit_size/1024, crit_percent/100.0*total_swap),
326 TRUE, 0,
327 TRUE, (long) total_swap));
329 return result;
330 }
334 int
335 check_swap (int usp, float free_swap)
336 {
337 int result = STATE_UNKNOWN;
338 free_swap = free_swap * 1024; /* Convert back to bytes as warn and crit specified in bytes */
339 if (usp >= 0 && crit_percent != 0 && usp >= (100.0 - crit_percent))
340 result = STATE_CRITICAL;
341 else if (crit_size > 0 && free_swap <= crit_size)
342 result = STATE_CRITICAL;
343 else if (usp >= 0 && warn_percent != 0 && usp >= (100.0 - warn_percent))
344 result = STATE_WARNING;
345 else if (warn_size > 0 && free_swap <= warn_size)
346 result = STATE_WARNING;
347 else if (usp >= 0.0)
348 result = STATE_OK;
349 return result;
350 }
354 /* process command-line arguments */
355 int
356 process_arguments (int argc, char **argv)
357 {
358 int c = 0; /* option character */
360 int option = 0;
361 static struct option longopts[] = {
362 {"warning", required_argument, 0, 'w'},
363 {"critical", required_argument, 0, 'c'},
364 {"allswaps", no_argument, 0, 'a'},
365 {"verbose", no_argument, 0, 'v'},
366 {"version", no_argument, 0, 'V'},
367 {"help", no_argument, 0, 'h'},
368 {0, 0, 0, 0}
369 };
371 if (argc < 2)
372 return ERROR;
374 while (1) {
375 c = getopt_long (argc, argv, "+?Vvhac:w:", longopts, &option);
377 if (c == -1 || c == EOF)
378 break;
380 switch (c) {
381 case 'w': /* warning size threshold */
382 if (is_intnonneg (optarg)) {
383 warn_size = (double) atoi (optarg);
384 break;
385 }
386 else if (strstr (optarg, ",") &&
387 strstr (optarg, "%") &&
388 sscanf (optarg, "%g,%d%%", &warn_size, &warn_percent) == 2) {
389 warn_size = floor(warn_size);
390 break;
391 }
392 else if (strstr (optarg, "%") &&
393 sscanf (optarg, "%d%%", &warn_percent) == 1) {
394 break;
395 }
396 else {
397 usage4 (_("Warning threshold must be integer or percentage!"));
398 }
399 case 'c': /* critical size threshold */
400 if (is_intnonneg (optarg)) {
401 crit_size = (double) atoi (optarg);
402 break;
403 }
404 else if (strstr (optarg, ",") &&
405 strstr (optarg, "%") &&
406 sscanf (optarg, "%g,%d%%", &crit_size, &crit_percent) == 2) {
407 crit_size = floor(crit_size);
408 break;
409 }
410 else if (strstr (optarg, "%") &&
411 sscanf (optarg, "%d%%", &crit_percent) == 1) {
412 break;
413 }
414 else {
415 usage4 (_("Critical threshold must be integer or percentage!"));
416 }
417 case 'a': /* all swap */
418 allswaps = TRUE;
419 break;
420 case 'v': /* verbose */
421 verbose++;
422 break;
423 case 'V': /* version */
424 print_revision (progname, revision);
425 exit (STATE_OK);
426 case 'h': /* help */
427 print_help ();
428 exit (STATE_OK);
429 case '?': /* error */
430 usage2 (_("Unknown argument"), optarg);
431 }
432 }
434 c = optind;
435 if (c == argc)
436 return validate_arguments ();
437 if (warn_percent == 0 && is_intnonneg (argv[c]))
438 warn_percent = atoi (argv[c++]);
440 if (c == argc)
441 return validate_arguments ();
442 if (crit_percent == 0 && is_intnonneg (argv[c]))
443 crit_percent = atoi (argv[c++]);
445 if (c == argc)
446 return validate_arguments ();
447 if (warn_size == 0 && is_intnonneg (argv[c]))
448 warn_size = (double) atoi (argv[c++]);
450 if (c == argc)
451 return validate_arguments ();
452 if (crit_size == 0 && is_intnonneg (argv[c]))
453 crit_size = (double) atoi (argv[c++]);
455 return validate_arguments ();
456 }
460 int
461 validate_arguments (void)
462 {
463 if (warn_percent == 0 && crit_percent == 0 && warn_size == 0
464 && crit_size == 0) {
465 return ERROR;
466 }
467 else if (warn_percent < crit_percent) {
468 usage4
469 (_("Warning percentage should be more than critical percentage"));
470 }
471 else if (warn_size < crit_size) {
472 usage4
473 (_("Warning free space should be more than critical free space"));
474 }
475 return OK;
476 }
480 void
481 print_help (void)
482 {
483 print_revision (progname, revision);
485 printf (_(COPYRIGHT), copyright, email);
487 printf (_("Check swap space on local machine.\n\n"));
489 print_usage ();
491 printf (_(UT_HELP_VRSN));
493 printf (_("\n\
494 -w, --warning=INTEGER\n\
495 Exit with WARNING status if less than INTEGER bytes of swap space are free\n\
496 -w, --warning=PERCENT%%\n\
497 Exit with WARNING status if less than PERCENT of swap space is free\n\
498 -c, --critical=INTEGER\n\
499 Exit with CRITICAL status if less than INTEGER bytes of swap space are free\n\
500 -c, --critical=PERCENT%%\n\
501 Exit with CRITCAL status if less than PERCENT of swap space is free\n\
502 -a, --allswaps\n\
503 Conduct comparisons for all swap partitions, one by one\n\
504 -v, --verbose\n\
505 Verbose output. Up to 3 levels\n"));
507 printf (_("\n\
508 On AIX, if -a is specified, uses lsps -a, otherwise uses lsps -s.\n"));
510 printf (_(UT_SUPPORT));
511 }
515 void
516 print_usage (void)
517 {
518 printf ("\
519 Usage: %s [-av] -w <percent_free>%% -c <percent_free>%%\n\
520 %s [-av] -w <bytes_free> -c <bytes_free>\n", progname, progname);
521 }