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"
67 /* If nonzero, show inode information. */
68 static int inode_format;
70 /* If nonzero, show even filesystems with zero size or
71 uninteresting types. */
72 static int show_all_fs;
74 /* If nonzero, show only local filesystems. */
75 static int show_local_fs;
77 /* If nonzero, output data for each filesystem corresponding to a
78 command line argument -- even if it's a dummy (automounter) entry. */
79 static int show_listed_fs;
81 /* If positive, the units to use when printing sizes;
82 if negative, the human-readable base. */
83 static int output_block_size;
85 /* If nonzero, invoke the `sync' system call before getting any usage data.
86 Using this option can make df very slow, especially with many or very
87 busy disks. Note that this may make a difference on some systems --
88 SunOs4.1.3, for one. It is *not* necessary on Linux. */
89 static int require_sync = 0;
91 /* A filesystem type to display. */
93 struct fs_type_list
94 {
95 char *fs_name;
96 struct fs_type_list *fs_next;
97 };
99 /* Linked list of filesystem types to display.
100 If `fs_select_list' is NULL, list all types.
101 This table is generated dynamically from command-line options,
102 rather than hardcoding into the program what it thinks are the
103 valid filesystem types; let the user specify any filesystem type
104 they want to, and if there are any filesystems of that type, they
105 will be shown.
107 Some filesystem types:
108 4.2 4.3 ufs nfs swap ignore io vm efs dbg */
110 static struct fs_type_list *fs_select_list;
112 /* Linked list of filesystem types to omit.
113 If the list is empty, don't exclude any types. */
115 static struct fs_type_list *fs_exclude_list;
117 /* Linked list of mounted filesystems. */
118 static struct mount_entry *mount_list;
120 /* For long options that have no equivalent short option, use a
121 non-character as a pseudo short option, starting with CHAR_MAX + 1. */
122 enum
123 {
124 SYNC_OPTION = CHAR_MAX + 1,
125 NO_SYNC_OPTION,
126 BLOCK_SIZE_OPTION
127 };
129 #ifdef _AIX
130 #pragma alloca
131 #endif
133 int process_arguments (int, char **);
134 int validate_arguments (void);
135 int check_disk (int usp, int free_disk);
136 void print_help (void);
137 void print_usage (void);
139 int w_df = -1;
140 int c_df = -1;
141 float w_dfp = -1.0;
142 float c_dfp = -1.0;
143 char *path = "";
144 char *exclude_device = "";
145 int verbose = 0;
146 int erronly = FALSE;
147 int display_mntp = FALSE;
150 int
151 main (int argc, char **argv)
152 {
153 int usp = -1;
154 int total_disk = -1;
155 int used_disk = -1;
156 int free_disk = -1;
157 int result = STATE_UNKNOWN;
158 int disk_result = STATE_UNKNOWN;
159 char *command_line = "";
160 char input_buffer[MAX_INPUT_BUFFER];
161 char file_system[MAX_INPUT_BUFFER];
162 char mntp[MAX_INPUT_BUFFER];
163 char *output = "";
165 struct fs_usage fsp;
166 char *disk;
168 if (process_arguments (argc, argv) != OK)
169 usage ("Could not parse arguments\n");
171 get_fs_usage (path, disk, &fsp);
173 usp = (fsp.fsu_blocks - fsp.fsu_bavail) / fsp.fsu_blocks;
174 disk_result = check_disk (usp, fsp.fsu_bavail);
175 result = disk_result;
176 asprintf (&output, "%llu of %llu kB (%2.0f%%) free (%d-byte blocks)",
177 fsp.fsu_bavail*fsp.fsu_blocksize/1024,
178 fsp.fsu_blocks*fsp.fsu_blocksize/1024,
179 (double)fsp.fsu_bavail*100/fsp.fsu_blocks,
180 fsp.fsu_blocksize);
182 terminate (result, "DISK %s %s\n", state_text (result), output);
183 }
185 /* process command-line arguments */
186 int
187 process_arguments (int argc, char **argv)
188 {
189 int c;
191 int option_index = 0;
192 static struct option long_options[] = {
193 {"warning", required_argument, 0, 'w'},
194 {"critical", required_argument, 0, 'c'},
195 {"timeout", required_argument, 0, 't'},
196 {"path", required_argument, 0, 'p'},
197 {"partition", required_argument, 0, 'p'},
198 {"verbose", no_argument, 0, 'v'},
199 {"version", no_argument, 0, 'V'},
200 {"errors-only", no_argument, 0, 'e'},
201 {"help", no_argument, 0, 'h'},
202 {"mountpoint", no_argument, 0, 'm'},
203 {"exclude_device", required_argument, 0, 'x'},
204 {"quiet", no_argument, 0, 'q'},
206 {0, 0, 0, 0}
207 };
209 if (argc < 2)
210 return ERROR;
212 for (c = 1; c < argc; c++)
213 if (strcmp ("-to", argv[c]) == 0)
214 strcpy (argv[c], "-t");
216 while (1) {
217 c = getopt_long (argc, argv, "+?Vqhvet:c:w:p:x:m", long_options, &option_index);
219 if (c == -1 || c == EOF)
220 break;
222 switch (c) {
223 case 'w': /* warning time threshold */
224 if (is_intnonneg (optarg)) {
225 w_df = atoi (optarg);
226 break;
227 }
228 else if (strpbrk (optarg, ",:") &&
229 strstr (optarg, "%") &&
230 sscanf (optarg, "%d%*[:,]%f%%", &w_df, &w_dfp) == 2) {
231 break;
232 }
233 else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &w_dfp) == 1) {
234 break;
235 }
236 else {
237 usage ("Warning threshold must be integer or percentage!\n");
238 }
239 case 'c': /* critical time threshold */
240 if (is_intnonneg (optarg)) {
241 c_df = atoi (optarg);
242 break;
243 }
244 else if (strpbrk (optarg, ",:") &&
245 strstr (optarg, "%") &&
246 sscanf (optarg, "%d%*[,:]%f%%", &c_df, &c_dfp) == 2) {
247 break;
248 }
249 else if (strstr (optarg, "%") && sscanf (optarg, "%f%%", &c_dfp) == 1) {
250 break;
251 }
252 else {
253 usage ("Critical threshold must be integer or percentage!\n");
254 }
255 case 't': /* timeout period */
256 if (is_integer (optarg)) {
257 timeout_interval = atoi (optarg);
258 break;
259 }
260 else {
261 usage ("Timeout Interval must be an integer!\n");
262 }
263 case 'p': /* path or partition */
264 path = optarg;
265 break;
266 case 'v': /* verbose */
267 verbose++;
268 break;
269 case 'q': /* verbose */
270 verbose--;
271 break;
272 case 'e':
273 erronly = TRUE;
274 break;
275 case 'm': /* display mountpoint */
276 display_mntp = TRUE;
277 break;
278 case 'x': /* exclude path or partition */
279 exclude_device = optarg;
280 break;
281 case 'V': /* version */
282 print_revision (progname, revision);
283 exit (STATE_OK);
284 case 'h': /* help */
285 print_help ();
286 exit (STATE_OK);
287 case '?': /* help */
288 usage ("check_disk: unrecognized option\n");
289 break;
290 }
291 }
293 c = optind;
294 if (w_dfp == -1 && argc > c && is_intnonneg (argv[c]))
295 w_dfp = (100.0 - atof (argv[c++]));
297 if (c_dfp == -1 && argc > c && is_intnonneg (argv[c]))
298 c_dfp = (100.0 - atof (argv[c++]));
300 if (argc > c && strlen (path) == 0)
301 path = argv[c++];
303 return validate_arguments ();
304 }
306 int
307 validate_arguments ()
308 {
309 if (w_df < 0 && c_df < 0 && w_dfp < 0 && c_dfp < 0) {
310 printf ("INPUT ERROR: Unable to parse command line\n");
311 return ERROR;
312 }
313 else if ((w_dfp >= 0 || c_dfp >= 0)
314 && (w_dfp < 0 || c_dfp < 0 || w_dfp > 100 || c_dfp > 100
315 || c_dfp > w_dfp)) {
316 printf
317 ("INPUT ERROR: C_DFP (%f) should be less than W_DFP (%f) and both should be between zero and 100 percent, inclusive\n",
318 c_dfp, w_dfp);
319 return ERROR;
320 }
321 else if ((w_df > 0 || c_df > 0) && (w_df < 0 || c_df < 0 || c_df > w_df)) {
322 printf
323 ("INPUT ERROR: C_DF (%d) should be less than W_DF (%d) and both should be greater than zero\n",
324 c_df, w_df);
325 return ERROR;
326 }
327 else {
328 return OK;
329 }
330 }
332 int
333 check_disk (usp, free_disk)
334 {
335 int result = STATE_UNKNOWN;
336 /* check the percent used space against thresholds */
337 if (usp >= 0 && usp >= (100.0 - c_dfp))
338 result = STATE_CRITICAL;
339 else if (c_df >= 0 && free_disk <= c_df)
340 result = STATE_CRITICAL;
341 else if (usp >= 0 && usp >= (100.0 - w_dfp))
342 result = STATE_WARNING;
343 else if (w_df >= 0 && free_disk <= w_df)
344 result = STATE_WARNING;
345 else if (usp >= 0.0)
346 result = STATE_OK;
347 return result;
348 }
350 void
351 print_help (void)
352 {
353 print_revision (progname, revision);
354 printf ("Copyright (c) %s %s\n\t<%s>\n\n%s\n",
355 copyright, authors, email, summary);
356 print_usage ();
357 printf ("\nOptions:\n");
358 printf (options);
359 support ();
360 }
362 void
363 print_usage (void)
364 {
365 printf
366 ("Usage: %s %s\n"
367 " %s (-h|--help)\n"
368 " %s (-V|--version)\n", progname, option_summary, progname, progname);
369 }