c8cfecd2a4a2cfa73ac46238c9f77b0a597d328c
1 /******************************************************************************
3 This program is free software; you can redistribute it and/or modify
4 it under the terms of the GNU General Public License as published by
5 the Free Software Foundation; either version 2 of the License, or
6 (at your option) any later version.
8 This program is distributed in the hope that it will be useful,
9 but WITHOUT ANY WARRANTY; without even the implied warranty of
10 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 GNU General Public License for more details.
13 You should have received a copy of the GNU General Public License
14 along with this program; if not, write to the Free Software
15 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 *****************************************************************************/
19 const char *progname = "check_disk";
20 const char *revision = "$Revision$";
21 const char *copyright = "1999-2003";
22 const char *email = "nagiosplug-devel@lists.sourceforge.net";
24 #include "common.h"
25 #if HAVE_INTTYPES_H
26 # include <inttypes.h>
27 #endif
28 #include <assert.h>
29 #include "popen.h"
30 #include "utils.h"
31 #include <stdarg.h>
32 #include "../lib/fsusage.h"
33 #include "../lib/mountlist.h"
34 #if HAVE_LIMITS_H
35 # include <limits.h>
36 #endif
38 /* If nonzero, show inode information. */
39 /* static int inode_format; */
41 /* If nonzero, show even filesystems with zero size or
42 uninteresting types. */
43 static int show_all_fs = 1;
45 /* If nonzero, show only local filesystems. */
46 static int show_local_fs = 0;
48 /* If positive, the units to use when printing sizes;
49 if negative, the human-readable base. */
50 /* static int output_block_size; */
52 /* If nonzero, invoke the `sync' system call before getting any usage data.
53 Using this option can make df very slow, especially with many or very
54 busy disks. Note that this may make a difference on some systems --
55 SunOs4.1.3, for one. It is *not* necessary on Linux. */
56 /* static int require_sync = 0; */
58 /* A filesystem type to display. */
60 struct name_list
61 {
62 char *name;
63 int found;
64 uintmax_t w_df;
65 uintmax_t c_df;
66 double w_dfp;
67 double c_dfp;
68 struct name_list *name_next;
69 };
71 /* Linked list of filesystem types to display.
72 If `fs_select_list' is NULL, list all types.
73 This table is generated dynamically from command-line options,
74 rather than hardcoding into the program what it thinks are the
75 valid filesystem types; let the user specify any filesystem type
76 they want to, and if there are any filesystems of that type, they
77 will be shown.
79 Some filesystem types:
80 4.2 4.3 ufs nfs swap ignore io vm efs dbg */
82 /* static struct name_list *fs_select_list; */
84 /* Linked list of filesystem types to omit.
85 If the list is empty, don't exclude any types. */
87 static struct name_list *fs_exclude_list;
89 static struct name_list *dp_exclude_list;
91 static struct name_list *path_select_list;
93 static struct name_list *dev_select_list;
95 /* Linked list of mounted filesystems. */
96 static struct mount_entry *mount_list;
98 /* For long options that have no equivalent short option, use a
99 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
100 enum
101 {
102 SYNC_OPTION = CHAR_MAX + 1,
103 NO_SYNC_OPTION,
104 BLOCK_SIZE_OPTION
105 };
107 #ifdef _AIX
108 #pragma alloca
109 #endif
111 int process_arguments (int, char **);
112 void print_path (const char *mypath);
113 int validate_arguments (uintmax_t, uintmax_t, double, double, char *);
114 int check_disk (double usp, uintmax_t free_disk);
115 int walk_name_list (struct name_list *list, const char *name);
116 void print_help (void);
117 void print_usage (void);
119 uintmax_t w_df = 0;
120 uintmax_t c_df = 0;
121 double w_dfp = -1.0;
122 double c_dfp = -1.0;
123 char *path;
124 char *exclude_device;
125 char *units;
126 uintmax_t mult = 1024 * 1024;
127 int verbose = 0;
128 int erronly = FALSE;
129 int display_mntp = FALSE;
131 /* Linked list of mounted filesystems. */
132 static struct mount_entry *mount_list;
135 \f
136 int
137 main (int argc, char **argv)
138 {
139 double usp = -1.0;
140 int result = STATE_UNKNOWN;
141 int disk_result = STATE_UNKNOWN;
142 char file_system[MAX_INPUT_BUFFER];
143 char *output;
144 char *details;
145 float free_space, free_space_pct, total_space;
147 struct mount_entry *me;
148 struct fs_usage fsp;
149 struct name_list *temp_list;
151 output = strdup ("");
152 details = strdup ("");
154 mount_list = read_filesystem_list (0);
156 if (process_arguments (argc, argv) != OK)
157 usage (_("Could not parse arguments\n"));
159 for (me = mount_list; me; me = me->me_next) {
161 if (path_select_list &&
162 (walk_name_list (path_select_list, me->me_mountdir) ||
163 walk_name_list (path_select_list, me->me_devname) ) )
164 get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
165 else if (dev_select_list || path_select_list)
166 continue;
167 else if (me->me_remote && show_local_fs)
168 continue;
169 else if (me->me_dummy && !show_all_fs)
170 continue;
171 else if (fs_exclude_list && walk_name_list (fs_exclude_list, me->me_type))
172 continue;
173 else if (dp_exclude_list &&
174 (walk_name_list (dp_exclude_list, me->me_devname) ||
175 walk_name_list (dp_exclude_list, me->me_mountdir)))
176 continue;
177 else
178 get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
180 if (fsp.fsu_blocks && strcmp ("none", me->me_mountdir)) {
181 usp = (double)(fsp.fsu_blocks - fsp.fsu_bavail) * 100 / fsp.fsu_blocks;
182 disk_result = check_disk (usp, fsp.fsu_bavail);
183 result = max_state (disk_result, result);
184 if (disk_result==STATE_OK && erronly && !verbose)
185 continue;
187 free_space = (float)fsp.fsu_bavail*fsp.fsu_blocksize/mult;
188 free_space_pct = (float)fsp.fsu_bavail*100/fsp.fsu_blocks;
189 total_space = (float)fsp.fsu_blocks*fsp.fsu_blocksize/mult;
190 if (disk_result!=STATE_OK || verbose>=0)
191 asprintf (&output, ("%s [%.0f %s (%.0f%%) free on %s]"),
192 output,
193 free_space,
194 units,
195 free_space_pct,
196 (!strcmp(file_system, "none") || display_mntp) ? me->me_devname : me->me_mountdir);
197 asprintf (&details, _("%s\n\
198 %.0f of %.0f %s (%.0f%%) free on %s (type %s mounted on %s) warn:%lu crit:%lu warn%%:%.0f%% crit%%:%.0f%%"),
199 details, free_space, total_space, units, free_space_pct,
200 me->me_devname, me->me_type, me->me_mountdir,
201 (unsigned long)w_df, (unsigned long)c_df, w_dfp, c_dfp);
202 }
204 }
206 if (verbose > 2)
207 asprintf (&output, "%s%s", output, details);
209 /* Override result if paths specified and not found */
210 temp_list = path_select_list;
211 while (temp_list) {
212 if (temp_list->found != TRUE) {
213 asprintf (&output, _("%s [%s not found]"), output, temp_list->name);
214 result = STATE_CRITICAL;
215 }
216 temp_list = temp_list->name_next;
217 }
219 die (result, "DISK %s%s%s\n", state_text (result), output, details);
220 return STATE_UNKNOWN;
221 }
225 \f
226 /* process command-line arguments */
227 int
228 process_arguments (int argc, char **argv)
229 {
230 int c;
231 struct name_list *se;
232 struct name_list **pathtail = &path_select_list;
233 struct name_list **fstail = &fs_exclude_list;
234 struct name_list **dptail = &dp_exclude_list;
235 struct name_list *temp_list;
236 int result = OK;
238 unsigned long l;
240 int option = 0;
241 static struct option longopts[] = {
242 {"timeout", required_argument, 0, 't'},
243 {"warning", required_argument, 0, 'w'},
244 {"critical", required_argument, 0, 'c'},
245 {"local", required_argument, 0, 'l'},
246 {"kilobytes", required_argument, 0, 'k'},
247 {"megabytes", required_argument, 0, 'm'},
248 {"units", required_argument, 0, 'u'},
249 {"path", required_argument, 0, 'p'},
250 {"partition", required_argument, 0, 'p'},
251 {"exclude_device", required_argument, 0, 'x'},
252 {"exclude-type", required_argument, 0, 'X'},
253 {"mountpoint", no_argument, 0, 'M'},
254 {"errors-only", no_argument, 0, 'e'},
255 {"verbose", no_argument, 0, 'v'},
256 {"quiet", no_argument, 0, 'q'},
257 {"clear", no_argument, 0, 'C'},
258 {"version", no_argument, 0, 'V'},
259 {"help", no_argument, 0, 'h'},
260 {0, 0, 0, 0}
261 };
263 if (argc < 2)
264 return ERROR;
266 se = (struct name_list *) malloc (sizeof (struct name_list));
267 se->name = strdup ("iso9660");
268 se->name_next = NULL;
269 *fstail = se;
270 fstail = &se->name_next;
272 for (c = 1; c < argc; c++)
273 if (strcmp ("-to", argv[c]) == 0)
274 strcpy (argv[c], "-t");
276 while (1) {
277 c = getopt_long (argc, argv, "+?VqhveCt:c:w:u:p:x:X:mklM", longopts, &option);
279 if (c == -1 || c == EOF)
280 break;
282 switch (c) {
283 case 't': /* timeout period */
284 if (is_integer (optarg)) {
285 timeout_interval = atoi (optarg);
286 break;
287 }
288 else {
289 usage (_("Timeout Interval must be an integer!\n"));
290 }
291 case 'w': /* warning threshold */
292 if (is_intnonneg (optarg)) {
293 w_df = atoi (optarg);
294 break;
295 }
296 else if (strpbrk (optarg, ",:") &&
297 strstr (optarg, "%") &&
298 sscanf (optarg, "%lu%*[:,]%lf%%", &l, &w_dfp) == 2) {
299 w_df = (uintmax_t)l;
300 break;
301 }
302 else if (strstr (optarg, "%") && sscanf (optarg, "%lf%%", &w_dfp) == 1) {
303 break;
304 }
305 else {
306 usage (_("Warning threshold must be integer or percentage!\n"));
307 }
308 case 'c': /* critical threshold */
309 if (is_intnonneg (optarg)) {
310 c_df = atoi (optarg);
311 break;
312 }
313 else if (strpbrk (optarg, ",:") &&
314 strstr (optarg, "%") &&
315 sscanf (optarg, "%lu%*[,:]%lf%%", &l, &c_dfp) == 2) {
316 c_df = (uintmax_t)l;
317 break;
318 }
319 else if (strstr (optarg, "%") && sscanf (optarg, "%lf%%", &c_dfp) == 1) {
320 break;
321 }
322 else {
323 usage (_("Critical threshold must be integer or percentage!\n"));
324 }
325 case 'u':
326 if (units)
327 free(units);
328 if (! strcmp (optarg, "bytes")) {
329 mult = (uintmax_t)1;
330 units = strdup ("B");
331 } else if (! strcmp (optarg, "kB")) {
332 mult = (uintmax_t)1024;
333 units = strdup ("kB");
334 } else if (! strcmp (optarg, "MB")) {
335 mult = (uintmax_t)1024 * 1024;
336 units = strdup ("MB");
337 } else if (! strcmp (optarg, "GB")) {
338 mult = (uintmax_t)1024 * 1024 * 1024;
339 units = strdup ("GB");
340 } else if (! strcmp (optarg, "TB")) {
341 mult = (uintmax_t)1024 * 1024 * 1024 * 1024;
342 units = strdup ("TB");
343 } else {
344 die (STATE_UNKNOWN, _("unit type %s not known\n"), optarg);
345 }
346 if (units == NULL)
347 die (STATE_UNKNOWN, _("failed allocating storage for '%s'\n"), "units");
348 break;
349 case 'k': /* display mountpoint */
350 mult = 1024;
351 if (units)
352 free(units);
353 units = strdup ("kB");
354 break;
355 case 'm': /* display mountpoint */
356 mult = 1024 * 1024;
357 if (units)
358 free(units);
359 units = strdup ("kB");
360 break;
361 case 'l':
362 show_local_fs = 1;
363 break;
364 case 'p': /* select path */
365 se = (struct name_list *) malloc (sizeof (struct name_list));
366 se->name = optarg;
367 se->name_next = NULL;
368 se->w_df = w_df;
369 se->c_df = c_df;
370 se->w_dfp = w_dfp;
371 se->c_dfp = c_dfp;
372 *pathtail = se;
373 pathtail = &se->name_next;
374 break;
375 case 'x': /* exclude path or partition */
376 se = (struct name_list *) malloc (sizeof (struct name_list));
377 se->name = optarg;
378 se->name_next = NULL;
379 *dptail = se;
380 dptail = &se->name_next;
381 break;
382 case 'X': /* exclude file system type */
383 se = (struct name_list *) malloc (sizeof (struct name_list));
384 se->name = optarg;
385 se->name_next = NULL;
386 *fstail = se;
387 fstail = &se->name_next;
388 break;
389 case 'v': /* verbose */
390 verbose++;
391 break;
392 case 'q': /* verbose */
393 verbose--;
394 break;
395 case 'e':
396 erronly = TRUE;
397 break;
398 case 'M': /* display mountpoint */
399 display_mntp = TRUE;
400 break;
401 case 'C':
402 w_df = 0;
403 c_df = 0;
404 w_dfp = -1.0;
405 c_dfp = -1.0;
406 break;
407 case 'V': /* version */
408 print_revision (progname, revision);
409 exit (STATE_OK);
410 case 'h': /* help */
411 print_help ();
412 exit (STATE_OK);
413 case '?': /* help */
414 usage (_("check_disk: unrecognized option\n"));
415 break;
416 }
417 }
419 /* Support for "check_disk warn crit [fs]" with thresholds at used level */
420 c = optind;
421 if (w_dfp < 0 && argc > c && is_intnonneg (argv[c]))
422 w_dfp = (100.0 - atof (argv[c++]));
424 if (c_dfp < 0 && argc > c && is_intnonneg (argv[c]))
425 c_dfp = (100.0 - atof (argv[c++]));
427 if (argc > c && path == NULL) {
428 se = (struct name_list *) malloc (sizeof (struct name_list));
429 se->name = strdup (argv[c++]);
430 se->name_next = NULL;
431 se->w_df = w_df;
432 se->c_df = c_df;
433 se->w_dfp = w_dfp;
434 se->c_dfp = c_dfp;
435 *pathtail = se;
436 }
438 if (path_select_list) {
439 temp_list = path_select_list;
440 while (temp_list) {
441 if (validate_arguments (temp_list->w_df,
442 temp_list->c_df,
443 temp_list->w_dfp,
444 temp_list->c_dfp,
445 temp_list->name) == ERROR)
446 result = ERROR;
447 temp_list = temp_list->name_next;
448 }
449 return result;
450 } else {
451 return validate_arguments (w_df, c_df, w_dfp, c_dfp, NULL);
452 }
453 }
456 void
457 print_path (const char *mypath)
458 {
459 if (mypath == NULL)
460 printf ("\n");
461 else
462 printf (" for %s\n", mypath);
464 return;
465 }
467 int
468 validate_arguments (uintmax_t w, uintmax_t c, double wp, double cp, char *mypath)
469 {
470 if (w == 0 && c == 0 && wp < 0.0 && cp < 0.0) {
471 printf (_("INPUT ERROR: No thresholds specified"));
472 print_path (mypath);
473 return ERROR;
474 }
475 else if ((wp >= 0.0 || cp >= 0.0) &&
476 (wp < 0.0 || cp < 0.0 || wp > 100.0 || cp > 100.0 || cp > wp)) {
477 printf (_("\
478 INPUT ERROR: C_DFP (%f) should be less than W_DFP (%.1f) and both should be between zero and 100 percent, inclusive"),
479 cp, wp);
480 print_path (mypath);
481 return ERROR;
482 }
483 else if ((w > 0 || c > 0) && (w == 0 || c == 0 || c > w)) {
484 printf (_("\
485 INPUT ERROR: C_DF (%lu) should be less than W_DF (%lu) and both should be greater than zero"),
486 (unsigned long)c, (unsigned long)w);
487 print_path (mypath);
488 return ERROR;
489 }
491 if (units == NULL) {
492 units = strdup ("MB");
493 mult = (uintmax_t)1024 * 1024;
494 }
495 return OK;
496 }
500 \f
501 int
502 check_disk (double usp, uintmax_t free_disk)
503 {
504 int result = STATE_UNKNOWN;
505 /* check the percent used space against thresholds */
506 if (usp >= 0.0 && usp >= (100.0 - c_dfp))
507 result = STATE_CRITICAL;
508 else if (c_df > 0 && free_disk <= c_df)
509 result = STATE_CRITICAL;
510 else if (usp >= 0.0 && usp >= (100.0 - w_dfp))
511 result = STATE_WARNING;
512 else if (w_df > 0 && free_disk <= w_df)
513 result = STATE_WARNING;
514 else if (usp >= 0.0)
515 result = STATE_OK;
516 return result;
517 }
521 int
522 walk_name_list (struct name_list *list, const char *name)
523 {
524 while (list) {
525 if (! strcmp(list->name, name)) {
526 list->found = 1;
527 /* if required for name_lists that have not saved w_df, etc (eg exclude lists) */
528 if (list->w_df) w_df = list->w_df;
529 if (list->c_df) c_df = list->c_df;
530 if (list->w_dfp>=0.0) w_dfp = list->w_dfp;
531 if (list->c_dfp>=0.0) c_dfp = list->c_dfp;
532 return TRUE;
533 }
534 list = list->name_next;
535 }
536 return FALSE;
537 }
543 \f
544 void
545 print_help (void)
546 {
547 print_revision (progname, revision);
549 printf (_("Copyright (c) 1999 Ethan Galstad <nagios@nagios.org>\n"));
550 printf (_(COPYRIGHT), copyright, email);
552 printf (_("\
553 This plugin checks the amount of used disk space on a mounted file system\n\
554 and generates an alert if free space is less than one of the threshold values."));
556 print_usage ();
558 printf (_(UT_HELP_VRSN));
560 printf (_("\
561 -w, --warning=INTEGER\n\
562 Exit with WARNING status if less than INTEGER kilobytes of disk are free\n\
563 -w, --warning=PERCENT%%\n\
564 Exit with WARNING status if less than PERCENT of disk space is free\n\
565 -c, --critical=INTEGER\n\
566 Exit with CRITICAL status if less than INTEGER kilobytes of disk are free\n\
567 -c, --critical=PERCENT%%\n\
568 Exit with CRITCAL status if less than PERCENT of disk space is free\n\
569 -C, --clear\n\
570 Clear thresholds\n"));
572 printf (_("\
573 -u, --units=STRING\n\
574 Choose bytes, kB, MB, GB, TB (default: MB)\n\
575 -k, --kilobytes\n\
576 Same as '--units kB'\n\
577 -m, --megabytes\n\
578 Same as '--units MB'\n"));
580 printf (_("\
581 -l, --local\n\
582 Only check local filesystems\n\
583 -p, --path=PATH, --partition=PARTITION\n\
584 Path or partition (may be repeated)\n\
585 -x, --exclude_device=PATH <STRING>\n\
586 Ignore device (only works if -p unspecified)\n\
587 -X, --exclude-type=TYPE <STRING>\n\
588 Ignore all filesystems of indicated type (may be repeated)\n\
589 -M, --mountpoint\n\
590 Display the mountpoint instead of the partition\n\
591 -e, --errors-only\n\
592 Display only devices/mountpoints with errors\n"));
594 printf (_(UT_WARN_CRIT));
596 printf (_(UT_TIMEOUT), DEFAULT_SOCKET_TIMEOUT);
598 printf (_(UT_VERBOSE));
600 printf ("%s", _("Examples:\n\
601 check_disk -w 10% -c 5% -p /tmp -p /var -C -w 100000 -c 50000 -p /\n\
602 Checks /tmp and /var at 10%,5% and / at 100MB, 50MB\n"));
604 printf (_(UT_SUPPORT));
605 }
610 void
611 print_usage (void)
612 {
613 printf (_("\
614 Usage: %s -w limit -c limit [-p path | -x device] [-t timeout] [-m] [-e]\n\
615 [-v] [-q]\n\
616 %s (-h|--help)\n\
617 %s (-V|--version)\n"),
618 progname, progname, progname);
619 }