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 -p, --path=PATH, --partition=PARTTION\n\
43 Path or partition (checks all mounted partitions if unspecified)\n\
44 -m, --mountpoint\n\
45 Display the mountpoint instead of the partition\n\
46 -x, --exclude_device=PATH\n\
47 Ignore device (only works if -p unspecified)\n\
48 -e, --errors-only\n\
49 Display only devices/mountpoints with errors\n\
50 -v, --verbose\n\
51 Show details for command-line debugging (do not use with nagios server)\n\
52 -h, --help\n\
53 Print detailed help screen\n\
54 -V, --version\n\
55 Print version information\n";
57 #include "common.h"
58 #if HAVE_INTTYPES_H
59 # include <inttypes.h>
60 #endif
61 #include <assert.h>
62 #include "popen.h"
63 #include "utils.h"
64 #include <stdarg.h>
65 #include "../lib/fsusage.h"
66 #include "../lib/mountlist.h"
67 #if HAVE_LIMITS_H
68 # include <limits.h>
69 #endif
71 /* If nonzero, show inode information. */
72 static int inode_format;
74 /* If nonzero, show even filesystems with zero size or
75 uninteresting types. */
76 static int show_all_fs;
78 /* If nonzero, show only local filesystems. */
79 static int show_local_fs;
81 /* If nonzero, output data for each filesystem corresponding to a
82 command line argument -- even if it's a dummy (automounter) entry. */
83 static int show_listed_fs;
85 /* If positive, the units to use when printing sizes;
86 if negative, the human-readable base. */
87 static int output_block_size;
89 /* If nonzero, invoke the `sync' system call before getting any usage data.
90 Using this option can make df very slow, especially with many or very
91 busy disks. Note that this may make a difference on some systems --
92 SunOs4.1.3, for one. It is *not* necessary on Linux. */
93 static int require_sync = 0;
95 /* A filesystem type to display. */
97 struct name_list
98 {
99 char *name;
100 struct name_list *name_next;
101 };
103 /* Linked list of filesystem types to display.
104 If `fs_select_list' is NULL, list all types.
105 This table is generated dynamically from command-line options,
106 rather than hardcoding into the program what it thinks are the
107 valid filesystem types; let the user specify any filesystem type
108 they want to, and if there are any filesystems of that type, they
109 will be shown.
111 Some filesystem types:
112 4.2 4.3 ufs nfs swap ignore io vm efs dbg */
114 static struct name_list *fs_select_list;
116 /* Linked list of filesystem types to omit.
117 If the list is empty, don't exclude any types. */
119 static struct name_list *fs_exclude_list;
121 static struct name_list *dp_exclude_list;
123 static struct name_list *path_select_list;
125 static struct name_list *dev_select_list;
127 /* Linked list of mounted filesystems. */
128 static struct mount_entry *mount_list;
130 /* For long options that have no equivalent short option, use a
131 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
132 enum
133 {
134 SYNC_OPTION = CHAR_MAX + 1,
135 NO_SYNC_OPTION,
136 BLOCK_SIZE_OPTION
137 };
139 #ifdef _AIX
140 #pragma alloca
141 #endif
143 int process_arguments (int, char **);
144 int validate_arguments (void);
145 int check_disk (int usp, int free_disk);
146 int walk_name_list (struct name_list *list, const char *name);
147 void print_help (void);
148 void print_usage (void);
150 int w_df = -1;
151 int c_df = -1;
152 float w_dfp = -1.0;
153 float c_dfp = -1.0;
154 char *path = "";
155 char *exclude_device = "";
156 int verbose = 0;
157 int erronly = FALSE;
158 int display_mntp = FALSE;
160 /* Linked list of mounted filesystems. */
161 static struct mount_entry *mount_list;
163 int
164 main (int argc, char **argv)
165 {
166 int usp = -1;
167 int total_disk = -1;
168 int used_disk = -1;
169 int free_disk = -1;
170 int result = STATE_UNKNOWN;
171 int disk_result = STATE_UNKNOWN;
172 char *command_line = "";
173 char input_buffer[MAX_INPUT_BUFFER];
174 char file_system[MAX_INPUT_BUFFER];
175 char mntp[MAX_INPUT_BUFFER];
176 char *output = "";
177 char *details = "";
179 struct mount_entry *me;
180 struct fs_usage fsp;
181 char *disk;
183 mount_list = read_filesystem_list (0);
185 if (process_arguments (argc, argv) != OK)
186 usage ("Could not parse arguments\n");
188 for (me = mount_list; me; me = me->me_next) {
190 if ((dev_select_list &&
191 walk_name_list (dev_select_list, me->me_devname)) ||
192 (path_select_list &&
193 walk_name_list (path_select_list, me->me_mountdir)))
194 get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
195 else if (dev_select_list || path_select_list)
196 continue;
197 else if (fs_exclude_list && walk_name_list (fs_exclude_list, me->me_type))
198 continue;
199 else if (dp_exclude_list &&
200 walk_name_list (dp_exclude_list, me->me_devname) ||
201 walk_name_list (dp_exclude_list, me->me_mountdir))
202 continue;
203 else
204 get_fs_usage (me->me_mountdir, me->me_devname, &fsp);
206 if (fsp.fsu_blocks && strcmp ("none", me->me_mountdir)) {
207 usp = (fsp.fsu_blocks - fsp.fsu_bavail) * 100 / fsp.fsu_blocks;
208 disk_result = check_disk (usp, fsp.fsu_bavail);
209 result = max_state (disk_result, result);
210 if (disk_result==STATE_OK && erronly && !verbose)
211 continue;
213 if (disk_result!=STATE_OK || verbose>=0)
214 asprintf (&output, "%s [%llu MB (%2.0f%%) free on %s]",
215 output,
216 fsp.fsu_bavail*fsp.fsu_blocksize/1024/1024,
217 (double)fsp.fsu_bavail*100/fsp.fsu_blocks,
218 (!strcmp(file_system, "none") || display_mntp) ? me->me_devname : me->me_mountdir);
219 asprintf (&details, "%s\n%llu of %llu MB (%2.0f%%) free on %s (type %s mounted on %s)",
220 details,
221 fsp.fsu_bavail*fsp.fsu_blocksize/1024/1024,
222 fsp.fsu_blocks*fsp.fsu_blocksize/1024/1024,
223 (double)fsp.fsu_bavail*100/fsp.fsu_blocks,
224 me->me_devname,
225 me->me_type,
226 me->me_mountdir);
227 }
229 }
231 if (verbose > 2)
232 asprintf (&output, "%s%s", output, details);
234 terminate (result, "DISK %s%s\n", state_text (result), output, details);
235 }
239 \f
240 /* process command-line arguments */
241 int
242 process_arguments (int argc, char **argv)
243 {
244 int c;
245 struct name_list *se;
246 struct name_list **pathtail = &path_select_list;
247 struct name_list **devtail = &dev_select_list;
248 struct name_list **fstail = &fs_exclude_list;
249 struct name_list **dptail = &dp_exclude_list;
251 int option_index = 0;
252 static struct option long_options[] = {
253 {"warning", required_argument, 0, 'w'},
254 {"critical", required_argument, 0, 'c'},
255 {"timeout", required_argument, 0, 't'},
256 {"path", required_argument, 0, 'p'},
257 {"partition", required_argument, 0, 'p'},
258 {"verbose", no_argument, 0, 'v'},
259 {"version", no_argument, 0, 'V'},
260 {"errors-only", no_argument, 0, 'e'},
261 {"help", no_argument, 0, 'h'},
262 {"mountpoint", no_argument, 0, 'm'},
263 {"device", no_argument, 0, 'd'},
264 {"exclude_device", required_argument, 0, 'x'},
265 {"quiet", no_argument, 0, 'q'},
267 {0, 0, 0, 0}
268 };
270 if (argc < 2)
271 return ERROR;
273 for (c = 1; c < argc; c++)
274 if (strcmp ("-to", argv[c]) == 0)
275 strcpy (argv[c], "-t");
277 while (1) {
278 c = getopt_long (argc, argv, "+?Vqhvet:c:w:p:d:x:X:m", long_options, &option_index);
280 if (c == -1 || c == EOF)
281 break;
283 switch (c) {
284 case 'w': /* warning time threshold */
285 if (is_intnonneg (optarg)) {
286 w_df = atoi (optarg);
287 break;
288 }
289 else if (strpbrk (optarg, ",:") &&
290 strstr (optarg, "%") &&
291 sscanf (optarg, "%d%*[:,]%f%%", &w_df, &w_dfp) == 2) {
292 break;
293 }
294 else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &w_dfp) == 1) {
295 break;
296 }
297 else {
298 usage ("Warning threshold must be integer or percentage!\n");
299 }
300 case 'c': /* critical time threshold */
301 if (is_intnonneg (optarg)) {
302 c_df = atoi (optarg);
303 break;
304 }
305 else if (strpbrk (optarg, ",:") &&
306 strstr (optarg, "%") &&
307 sscanf (optarg, "%d%*[,:]%f%%", &c_df, &c_dfp) == 2) {
308 break;
309 }
310 else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &c_dfp) == 1) {
311 break;
312 }
313 else {
314 usage ("Critical threshold must be integer or percentage!\n");
315 }
316 case 't': /* timeout period */
317 if (is_integer (optarg)) {
318 timeout_interval = atoi (optarg);
319 break;
320 }
321 else {
322 usage ("Timeout Interval must be an integer!\n");
323 }
324 case 'p': /* selec path */
325 se = (struct name_list *) malloc (sizeof (struct name_list));
326 se->name = strdup (optarg);
327 se->name_next = NULL;
328 *pathtail = se;
329 pathtail = &se->name_next;
330 break;
331 case 'd': /* select partition/device */
332 se = (struct name_list *) malloc (sizeof (struct name_list));
333 se->name = strdup (optarg);
334 se->name_next = NULL;
335 *devtail = se;
336 devtail = &se->name_next;
337 break;
338 case 'x': /* exclude path or partition */
339 se = (struct name_list *) malloc (sizeof (struct name_list));
340 se->name = strdup (optarg);
341 se->name_next = NULL;
342 *dptail = se;
343 dptail = &se->name_next;
344 break;
345 break;
346 case 'X': /* exclude file system type */
347 se = (struct name_list *) malloc (sizeof (struct name_list));
348 se->name = strdup (optarg);
349 se->name_next = NULL;
350 *fstail = se;
351 fstail = &se->name_next;
352 break;
353 case 'v': /* verbose */
354 verbose++;
355 break;
356 case 'q': /* verbose */
357 verbose--;
358 break;
359 case 'e':
360 erronly = TRUE;
361 break;
362 case 'm': /* display mountpoint */
363 display_mntp = TRUE;
364 break;
365 case 'V': /* version */
366 print_revision (progname, revision);
367 exit (STATE_OK);
368 case 'h': /* help */
369 print_help ();
370 exit (STATE_OK);
371 case '?': /* help */
372 usage ("check_disk: unrecognized option\n");
373 break;
374 }
375 }
377 c = optind;
378 if (w_dfp == -1 && argc > c && is_intnonneg (argv[c]))
379 w_dfp = (100.0 - atof (argv[c++]));
381 if (c_dfp == -1 && argc > c && is_intnonneg (argv[c]))
382 c_dfp = (100.0 - atof (argv[c++]));
384 if (argc > c && strlen (path) == 0)
385 path = argv[c++];
387 return validate_arguments ();
388 }
392 int
393 validate_arguments ()
394 {
395 if (w_df < 0 && c_df < 0 && w_dfp < 0 && c_dfp < 0) {
396 printf ("INPUT ERROR: Unable to parse command line\n");
397 return ERROR;
398 }
399 else if ((w_dfp >= 0 || c_dfp >= 0)
400 && (w_dfp < 0 || c_dfp < 0 || w_dfp > 100 || c_dfp > 100
401 || c_dfp > w_dfp)) {
402 printf
403 ("INPUT ERROR: C_DFP (%f) should be less than W_DFP (%f) and both should be between zero and 100 percent, inclusive\n",
404 c_dfp, w_dfp);
405 return ERROR;
406 }
407 else if ((w_df > 0 || c_df > 0) && (w_df < 0 || c_df < 0 || c_df > w_df)) {
408 printf
409 ("INPUT ERROR: C_DF (%d) should be less than W_DF (%d) and both should be greater than zero\n",
410 c_df, w_df);
411 return ERROR;
412 }
413 else {
414 return OK;
415 }
416 }
420 \f
421 int
422 check_disk (int usp, int free_disk)
423 {
424 int result = STATE_UNKNOWN;
425 /* check the percent used space against thresholds */
426 if (usp >= 0 && usp >= (100.0 - c_dfp))
427 result = STATE_CRITICAL;
428 else if (c_df >= 0 && free_disk <= c_df)
429 result = STATE_CRITICAL;
430 else if (usp >= 0 && usp >= (100.0 - w_dfp))
431 result = STATE_WARNING;
432 else if (w_df >= 0 && free_disk <= w_df)
433 result = STATE_WARNING;
434 else if (usp >= 0.0)
435 result = STATE_OK;
436 return result;
437 }
441 int
442 walk_name_list (struct name_list *list, const char *name)
443 {
444 while (list) {
445 if (! strcmp(list->name, name))
446 return TRUE;
447 list = list->name_next;
448 }
449 return FALSE;
450 }
454 \f
455 void
456 print_help (void)
457 {
458 print_revision (progname, revision);
459 printf ("Copyright (c) %s %s\n\t<%s>\n\n%s\n",
460 copyright, authors, email, summary);
461 print_usage ();
462 printf ("\nOptions:\n");
463 printf (options);
464 support ();
465 }
467 void
468 print_usage (void)
469 {
470 printf
471 ("Usage: %s %s\n"
472 " %s (-h|--help)\n"
473 " %s (-V|--version)\n", progname, option_summary, progname, progname);
474 }