1 /******************************************************************************
2 *
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.
7 *
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.
12 *
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.
16 *
17 *****************************************************************************/
19 const char *progname = "check_disk";
20 const char *revision = "$Revision$";
21 const char *copyright = "1999-2003";
22 const char *authors = "Nagios Plugin Development Team";
23 const char *email = "nagiosplug-devel@lists.sourceforge.net";
25 const char *summary = "\
26 This plugin checks the amount of used disk space on a mounted file system\n\
27 and generates an alert if free space is less than one of the threshold values.";
29 const char *option_summary = "\
30 -w limit -c limit [-p path | -x device] [-t timeout] [-m] [-e]\n\
31 [-v] [-q]";
33 const char *options = "\
34 -w, --warning=INTEGER\n\
35 Exit with WARNING status if less than INTEGER kilobytes of disk are free\n\
36 -w, --warning=PERCENT%%\n\
37 Exit with WARNING status if less than PERCENT of disk space is free\n\
38 -c, --critical=INTEGER\n\
39 Exit with CRITICAL status if less than INTEGER kilobytes of disk are free\n\
40 -c, --critical=PERCENT%%\n\
41 Exit with CRITCAL status if less than PERCENT of disk space is free\n\
42 -u, --units=STRING\n\
43 Choose bytes, kB, MB, GB, TB (default: MB)\n\
44 -k, --kilobytes\n\
45 Same as '--units kB'\n\
46 -m, --megabytes\n\
47 Same as '--units MB'\n\
48 -l, --local\n\
49 Only check local filesystems\n\
50 -p, --path=PATH, --partition=PARTTION\n\
51 Path or partition (may be repeated)\n\
52 -x, --exclude_device=PATH <STRING>\n\
53 Ignore device (only works if -p unspecified)\n\
54 -X, --exclude-type=TYPE <STRING>\n\
55 Ignore all filesystems of indicated type (may be repeated)\n\
56 -M, --mountpoint\n\
57 Display the mountpoint instead of the partition\n\
58 -e, --errors-only\n\
59 Display only devices/mountpoints with errors\n\
60 -v, --verbose\n\
61 Show details for command-line debugging (do not use with nagios server)\n\
62 -h, --help\n\
63 Print detailed help screen\n\
64 -V, --version\n\
65 Print version information\n";
67 const char *notes = "\
68 \n";
70 #include "common.h"
71 #if HAVE_INTTYPES_H
72 # include <inttypes.h>
73 #endif
74 #include <assert.h>
75 #include "popen.h"
76 #include "utils.h"
77 #include <stdarg.h>
78 #include "../lib/fsusage.h"
79 #include "../lib/mountlist.h"
80 #if HAVE_LIMITS_H
81 # include <limits.h>
82 #endif
84 /* If nonzero, show inode information. */
85 static int inode_format;
87 /* If nonzero, show even filesystems with zero size or
88 uninteresting types. */
89 static int show_all_fs = 1;
91 /* If nonzero, show only local filesystems. */
92 static int show_local_fs = 0;
94 /* If positive, the units to use when printing sizes;
95 if negative, the human-readable base. */
96 static int output_block_size;
98 /* If nonzero, invoke the `sync' system call before getting any usage data.
99 Using this option can make df very slow, especially with many or very
100 busy disks. Note that this may make a difference on some systems --
101 SunOs4.1.3, for one. It is *not* necessary on Linux. */
102 static int require_sync = 0;
104 /* A filesystem type to display. */
106 struct name_list
107 {
108 char *name;
109 struct name_list *name_next;
110 };
112 /* Linked list of filesystem types to display.
113 If `fs_select_list' is NULL, list all types.
114 This table is generated dynamically from command-line options,
115 rather than hardcoding into the program what it thinks are the
116 valid filesystem types; let the user specify any filesystem type
117 they want to, and if there are any filesystems of that type, they
118 will be shown.
120 Some filesystem types:
121 4.2 4.3 ufs nfs swap ignore io vm efs dbg */
123 static struct name_list *fs_select_list;
125 /* Linked list of filesystem types to omit.
126 If the list is empty, don't exclude any types. */
128 static struct name_list *fs_exclude_list;
130 static struct name_list *dp_exclude_list;
132 static struct name_list *path_select_list;
134 static struct name_list *dev_select_list;
136 /* Linked list of mounted filesystems. */
137 static struct mount_entry *mount_list;
139 /* For long options that have no equivalent short option, use a
140 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
141 enum
142 {
143 SYNC_OPTION = CHAR_MAX + 1,
144 NO_SYNC_OPTION,
145 BLOCK_SIZE_OPTION
146 };
148 #ifdef _AIX
149 #pragma alloca
150 #endif
152 int process_arguments (int, char **);
153 int validate_arguments (void);
154 int check_disk (int usp, int free_disk);
155 int walk_name_list (struct name_list *list, const char *name);
156 void print_help (void);
157 void print_usage (void);
159 int w_df = -1;
160 int c_df = -1;
161 float w_dfp = -1.0;
162 float c_dfp = -1.0;
163 char *path = "";
164 char *exclude_device = "";
165 char *units = "MB";
166 unsigned long mult = 1024 * 1024;
167 int verbose = 0;
168 int erronly = FALSE;
169 int display_mntp = FALSE;
171 /* Linked list of mounted filesystems. */
172 static struct mount_entry *mount_list;
174 int
175 main (int argc, char **argv)
176 {
177 int usp = -1;
178 int total_disk = -1;
179 int used_disk = -1;
180 int free_disk = -1;
181 int result = STATE_UNKNOWN;
182 int disk_result = STATE_UNKNOWN;
183 char *command_line = "";
184 char input_buffer[MAX_INPUT_BUFFER];
185 char file_system[MAX_INPUT_BUFFER];
186 char mntp[MAX_INPUT_BUFFER];
187 char *output = "";
188 char *details = "";
190 struct mount_entry *me;
191 struct fs_usage fsp;
192 char *disk;
194 mount_list = read_filesystem_list (0);
196 if (process_arguments (argc, argv) != OK)
197 usage ("Could not parse arguments\n");
199 for (me = mount_list; me; me = me->me_next) {
201 if ((dev_select_list &&
202 walk_name_list (dev_select_list, me->me_devname)) ||
203 (path_select_list &&
204 walk_name_list (path_select_list, me->me_mountdir)))
205 get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
206 else if (dev_select_list || path_select_list)
207 continue;
208 else if (me->me_remote && show_local_fs)
209 continue;
210 else if (me->me_dummy && !show_all_fs)
211 continue;
212 else if (fs_exclude_list && walk_name_list (fs_exclude_list, me->me_type))
213 continue;
214 else if (dp_exclude_list &&
215 walk_name_list (dp_exclude_list, me->me_devname) ||
216 walk_name_list (dp_exclude_list, me->me_mountdir))
217 continue;
218 else
219 get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
221 if (fsp.fsu_blocks && strcmp ("none", me->me_mountdir)) {
222 usp = (fsp.fsu_blocks - fsp.fsu_bavail) * 100 / fsp.fsu_blocks;
223 disk_result = check_disk (usp, fsp.fsu_bavail);
224 result = max_state (disk_result, result);
225 if (disk_result==STATE_OK && erronly && !verbose)
226 continue;
228 if (disk_result!=STATE_OK || verbose>=0)
229 asprintf (&output, "%s [%llu %s (%2.0f%%) free on %s]",
230 output,
231 fsp.fsu_bavail*fsp.fsu_blocksize/mult,
232 units,
233 (double)fsp.fsu_bavail*100/fsp.fsu_blocks,
234 (!strcmp(file_system, "none") || display_mntp) ? me->me_devname : me->me_mountdir);
235 asprintf (&details, "%s\n%llu of %llu %s (%2.0f%%) free on %s (type %s mounted on %s)",
236 details,
237 fsp.fsu_bavail*fsp.fsu_blocksize/mult,
238 fsp.fsu_blocks*fsp.fsu_blocksize/mult,
239 units,
240 (double)fsp.fsu_bavail*100/fsp.fsu_blocks,
241 me->me_devname,
242 me->me_type,
243 me->me_mountdir);
244 }
246 }
248 if (verbose > 2)
249 asprintf (&output, "%s%s", output, details);
251 terminate (result, "DISK %s%s\n", state_text (result), output, details);
252 }
256 \f
257 /* process command-line arguments */
258 int
259 process_arguments (int argc, char **argv)
260 {
261 int c;
262 struct name_list *se;
263 struct name_list **pathtail = &path_select_list;
264 struct name_list **devtail = &dev_select_list;
265 struct name_list **fstail = &fs_exclude_list;
266 struct name_list **dptail = &dp_exclude_list;
268 int option_index = 0;
269 static struct option long_options[] = {
270 {"timeout", required_argument, 0, 't'},
271 {"warning", required_argument, 0, 'w'},
272 {"critical", required_argument, 0, 'c'},
273 {"local", required_argument, 0, 'l'},
274 {"kilobytes", required_argument, 0, 'k'},
275 {"megabytes", required_argument, 0, 'm'},
276 {"units", required_argument, 0, 'u'},
277 {"path", required_argument, 0, 'p'},
278 {"partition", required_argument, 0, 'p'},
279 {"device", required_argument, 0, 'd'},
280 {"exclude_device", required_argument, 0, 'x'},
281 {"exclude-type", required_argument, 0, 'X'},
282 {"mountpoint", no_argument, 0, 'M'},
283 {"errors-only", no_argument, 0, 'e'},
284 {"verbose", no_argument, 0, 'v'},
285 {"quiet", no_argument, 0, 'q'},
286 {"version", no_argument, 0, 'V'},
287 {"help", no_argument, 0, 'h'},
288 {0, 0, 0, 0}
289 };
291 if (argc < 2)
292 return ERROR;
294 se = (struct name_list *) malloc (sizeof (struct name_list));
295 se->name = strdup ("iso9660");
296 se->name_next = NULL;
297 *fstail = se;
298 fstail = &se->name_next;
300 for (c = 1; c < argc; c++)
301 if (strcmp ("-to", argv[c]) == 0)
302 strcpy (argv[c], "-t");
304 while (1) {
305 c = getopt_long (argc, argv, "+?Vqhvet:c:w:u:p:d:x:X:mklM", long_options, &option_index);
307 if (c == -1 || c == EOF)
308 break;
310 switch (c) {
311 case 't': /* timeout period */
312 if (is_integer (optarg)) {
313 timeout_interval = atoi (optarg);
314 break;
315 }
316 else {
317 usage ("Timeout Interval must be an integer!\n");
318 }
319 case 'w': /* warning time threshold */
320 if (is_intnonneg (optarg)) {
321 w_df = atoi (optarg);
322 break;
323 }
324 else if (strpbrk (optarg, ",:") &&
325 strstr (optarg, "%") &&
326 sscanf (optarg, "%d%*[:,]%f%%", &w_df, &w_dfp) == 2) {
327 break;
328 }
329 else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &w_dfp) == 1) {
330 break;
331 }
332 else {
333 usage ("Warning threshold must be integer or percentage!\n");
334 }
335 case 'c': /* critical time threshold */
336 if (is_intnonneg (optarg)) {
337 c_df = atoi (optarg);
338 break;
339 }
340 else if (strpbrk (optarg, ",:") &&
341 strstr (optarg, "%") &&
342 sscanf (optarg, "%d%*[,:]%f%%", &c_df, &c_dfp) == 2) {
343 break;
344 }
345 else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &c_dfp) == 1) {
346 break;
347 }
348 else {
349 usage ("Critical threshold must be integer or percentage!\n");
350 }
351 case 'u':
352 if (! strcmp (optarg, "bytes")) {
353 mult = 1;
354 units = "B";
355 } else if (! strcmp (optarg, "kB")) {
356 mult = 1024;
357 units = "kB";
358 } else if (! strcmp (optarg, "MB")) {
359 mult = 1024 * 1024;
360 units = "MB";
361 } else if (! strcmp (optarg, "GB")) {
362 mult = 1024 * 1024 * 1024;
363 units = "GB";
364 } else if (! strcmp (optarg, "TB")) {
365 mult = (unsigned long)1024 * 1024 * 1024 * 1024;
366 units = "TB";
367 } else {
368 terminate (STATE_UNKNOWN, "unit type %s not known", optarg);
369 }
370 break;
371 case 'k': /* display mountpoint */
372 mult = 1024;
373 units = "kB";
374 break;
375 case 'm': /* display mountpoint */
376 mult = 1024 * 1024;
377 units = "MB";
378 break;
379 case 'l':
380 show_local_fs = 1;
381 break;
382 case 'p': /* selec path */
383 se = (struct name_list *) malloc (sizeof (struct name_list));
384 se->name = strdup (optarg);
385 se->name_next = NULL;
386 *pathtail = se;
387 pathtail = &se->name_next;
388 break;
389 case 'd': /* select partition/device */
390 se = (struct name_list *) malloc (sizeof (struct name_list));
391 se->name = strdup (optarg);
392 se->name_next = NULL;
393 *devtail = se;
394 devtail = &se->name_next;
395 break;
396 case 'x': /* exclude path or partition */
397 se = (struct name_list *) malloc (sizeof (struct name_list));
398 se->name = strdup (optarg);
399 se->name_next = NULL;
400 *dptail = se;
401 dptail = &se->name_next;
402 break;
403 break;
404 case 'X': /* exclude file system type */
405 se = (struct name_list *) malloc (sizeof (struct name_list));
406 se->name = strdup (optarg);
407 se->name_next = NULL;
408 *fstail = se;
409 fstail = &se->name_next;
410 break;
411 case 'v': /* verbose */
412 verbose++;
413 break;
414 case 'q': /* verbose */
415 verbose--;
416 break;
417 case 'e':
418 erronly = TRUE;
419 break;
420 case 'M': /* display mountpoint */
421 display_mntp = TRUE;
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 '?': /* help */
430 usage ("check_disk: unrecognized option\n");
431 break;
432 }
433 }
435 c = optind;
436 if (w_dfp == -1 && argc > c && is_intnonneg (argv[c]))
437 w_dfp = (100.0 - atof (argv[c++]));
439 if (c_dfp == -1 && argc > c && is_intnonneg (argv[c]))
440 c_dfp = (100.0 - atof (argv[c++]));
442 if (argc > c && strlen (path) == 0)
443 path = argv[c++];
445 return validate_arguments ();
446 }
450 int
451 validate_arguments ()
452 {
453 if (w_df < 0 && c_df < 0 && w_dfp < 0 && c_dfp < 0) {
454 printf ("INPUT ERROR: Unable to parse command line\n");
455 return ERROR;
456 }
457 else if ((w_dfp >= 0 || c_dfp >= 0)
458 && (w_dfp < 0 || c_dfp < 0 || w_dfp > 100 || c_dfp > 100
459 || c_dfp > w_dfp)) {
460 printf
461 ("INPUT ERROR: C_DFP (%f) should be less than W_DFP (%f) and both should be between zero and 100 percent, inclusive\n",
462 c_dfp, w_dfp);
463 return ERROR;
464 }
465 else if ((w_df > 0 || c_df > 0) && (w_df < 0 || c_df < 0 || c_df > w_df)) {
466 printf
467 ("INPUT ERROR: C_DF (%d) should be less than W_DF (%d) and both should be greater than zero\n",
468 c_df, w_df);
469 return ERROR;
470 }
471 else {
472 return OK;
473 }
474 }
478 \f
479 int
480 check_disk (int usp, int free_disk)
481 {
482 int result = STATE_UNKNOWN;
483 /* check the percent used space against thresholds */
484 if (usp >= 0 && usp >= (100.0 - c_dfp))
485 result = STATE_CRITICAL;
486 else if (c_df >= 0 && free_disk <= c_df)
487 result = STATE_CRITICAL;
488 else if (usp >= 0 && usp >= (100.0 - w_dfp))
489 result = STATE_WARNING;
490 else if (w_df >= 0 && free_disk <= w_df)
491 result = STATE_WARNING;
492 else if (usp >= 0.0)
493 result = STATE_OK;
494 return result;
495 }
499 int
500 walk_name_list (struct name_list *list, const char *name)
501 {
502 while (list) {
503 if (! strcmp(list->name, name))
504 return TRUE;
505 list = list->name_next;
506 }
507 return FALSE;
508 }
512 \f
513 void
514 print_help (void)
515 {
516 print_revision (progname, revision);
517 printf ("Copyright (c) %s %s\n\t<%s>\n\n%s\n",
518 copyright, authors, email, summary);
519 print_usage ();
520 printf ("\nOptions:\n");
521 printf (options);
522 printf (notes);
523 support ();
524 }
526 void
527 print_usage (void)
528 {
529 printf
530 ("Usage: %s %s\n"
531 " %s (-h|--help)\n"
532 " %s (-V|--version)\n", progname, option_summary, progname, progname);
533 }