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 $Id$
19 ******************************************************************************/
21 const char *progname = "check_load";
22 const char *revision = "$Revision$";
23 const char *copyright = "1999-2004";
24 const char *email = "nagiosplug-devel@lists.sourceforge.net";
26 #include "common.h"
27 #include "utils.h"
28 #include "popen.h"
30 #ifdef HAVE_SYS_LOADAVG_H
31 #include <sys/loadavg.h>
32 #endif
34 /* needed for compilation under NetBSD, as suggested by Andy Doran */
35 #ifndef LOADAVG_1MIN
36 #define LOADAVG_1MIN 0
37 #define LOADAVG_5MIN 1
38 #define LOADAVG_15MIN 2
39 #endif /* !defined LOADAVG_1MIN */
42 static int process_arguments (int argc, char **argv);
43 static int validate_arguments (void);
44 void print_help (void);
45 void print_usage (void);
47 /* strictly for pretty-print usage in loops */
48 static const int nums[3] = { 1, 5, 15 };
50 /* provide some fairly sane defaults */
51 double wload[3] = { 0.0, 0.0, 0.0 };
52 double cload[3] = { 0.0, 0.0, 0.0 };
53 #define la1 la[0]
54 #define la5 la[1]
55 #define la15 la[2]
57 char *status_line;
59 static void
60 get_threshold(char *arg, double *th)
61 {
62 size_t i, n;
63 char *str = arg, *p;
65 n = strlen(arg);
66 for(i = 0; i < 3; i++) {
67 th[i] = strtod(str, &p);
68 if(p == str) break;
70 str = p + 1;
71 if(n <= (size_t)(str - arg)) break;
72 }
74 /* empty argument or non-floatish, so warn about it and die */
75 if(!i) usage (_("Warning threshold must be float or float triplet!\n"));
77 if(i != 2) {
78 /* one or more numbers were given, so fill array with last
79 * we got (most likely to NOT produce the least expected result) */
80 for(n = i; n < 3; n++) th[n] = th[i];
81 }
82 }
85 int
86 main (int argc, char **argv)
87 {
88 int result;
89 int i;
91 double la[3] = { 0.0, 0.0, 0.0 }; /* NetBSD complains about unitialized arrays */
92 #ifndef HAVE_GETLOADAVG
93 char input_buffer[MAX_INPUT_BUFFER];
94 # ifdef HAVE_PROC_LOADAVG
95 FILE *fp;
96 char *str, *next;
97 # endif
98 #endif
100 setlocale (LC_ALL, "");
101 bindtextdomain (PACKAGE, LOCALEDIR);
102 textdomain (PACKAGE);
104 if (process_arguments (argc, argv) == ERROR)
105 usage4 (_("Could not parse arguments"));
107 #ifdef HAVE_GETLOADAVG
108 result = getloadavg (la, 3);
109 if (result != 3)
110 return STATE_UNKNOWN;
111 #else
112 # ifdef HAVE_PROC_LOADAVG
113 fp = fopen (PROC_LOADAVG, "r");
114 if (fp == NULL) {
115 printf (_("Error opening %s\n"), PROC_LOADAVG);
116 return STATE_UNKNOWN;
117 }
119 while (fgets (input_buffer, MAX_INPUT_BUFFER - 1, fp)) {
120 str = (char *)input_buffer;
121 for(i = 0; i < 3; i++) {
122 la[i] = strtod(str, &next);
123 str = next;
124 }
125 }
127 fclose (fp);
128 # else
129 child_process = spopen (PATH_TO_UPTIME);
130 if (child_process == NULL) {
131 printf (_("Error opening %s\n"), PATH_TO_UPTIME);
132 return STATE_UNKNOWN;
133 }
134 child_stderr = fdopen (child_stderr_array[fileno (child_process)], "r");
135 if (child_stderr == NULL) {
136 printf (_("Could not open stderr for %s\n"), PATH_TO_UPTIME);
137 }
138 fgets (input_buffer, MAX_INPUT_BUFFER - 1, child_process);
139 sscanf (input_buffer, "%*[^l]load average: %f, %f, %f", &la1, &la5, &la15);
141 result = spclose (child_process);
142 if (result) {
143 printf (_("Error code %d returned in %s\n"), result, PATH_TO_UPTIME);
144 return STATE_UNKNOWN;
145 }
146 # endif
147 #endif
149 if ((la[0] < 0.0) || (la[1] < 0.0) || (la[2] < 0.0)) {
150 #ifdef HAVE_GETLOADAVG
151 printf (_("Error in getloadavg()\n"));
152 #else
153 # ifdef HAVE_PROC_LOADAVG
154 printf (_("Error processing %s\n"), PROC_LOADAVG);
155 # else
156 printf (_("Error processing %s\n"), PATH_TO_UPTIME);
157 # endif
158 #endif
159 return STATE_UNKNOWN;
160 }
162 /* we got this far, so assume OK until we've measured */
163 result = STATE_OK;
165 asprintf(&status_line, _("load average: %.2f, %.2f, %.2f"), la1, la5, la15);
167 for(i = 0; i < 3; i++) {
168 if(la[i] > cload[i]) {
169 result = STATE_CRITICAL;
170 break;
171 }
172 else if(la[i] > wload[i]) result = STATE_WARNING;
173 }
175 printf("%s - %s|", state_text(result), status_line);
176 for(i = 0; i < 3; i++)
177 printf("load%d=%.3f;%.3f;%.3f;0; ", nums[i], la[i], wload[i], cload[i]);
179 putchar('\n');
180 return result;
181 }
184 /* process command-line arguments */
185 static int
186 process_arguments (int argc, char **argv)
187 {
188 int c = 0;
190 int option = 0;
191 static struct option longopts[] = {
192 {"warning", required_argument, 0, 'w'},
193 {"critical", required_argument, 0, 'c'},
194 {"version", no_argument, 0, 'V'},
195 {"help", no_argument, 0, 'h'},
196 {0, 0, 0, 0}
197 };
199 if (argc < 2)
200 return ERROR;
202 while (1) {
203 c = getopt_long (argc, argv, "Vhc:w:", longopts, &option);
205 if (c == -1 || c == EOF)
206 break;
208 switch (c) {
209 case 'w': /* warning time threshold */
210 get_threshold(optarg, wload);
211 break;
212 case 'c': /* critical time threshold */
213 get_threshold(optarg, cload);
214 break;
215 case 'V': /* version */
216 print_revision (progname, revision);
217 exit (STATE_OK);
218 case 'h': /* help */
219 print_help ();
220 exit (STATE_OK);
221 case '?': /* help */
222 usage2 (_("Unknown argument"), optarg);
223 }
224 }
226 c = optind;
227 if (c == argc)
228 return validate_arguments ();
230 /* handle the case if both arguments are missing,
231 * but not if only one is given without -c or -w flag */
232 if(c - argc == 2) {
233 get_threshold(argv[c++], wload);
234 get_threshold(argv[c++], cload);
235 }
236 else if(c - argc == 1) {
237 get_threshold(argv[c++], cload);
238 }
240 return validate_arguments ();
241 }
245 static int
246 validate_arguments (void)
247 {
248 int i = 0;
250 /* match cload first, as it will give the most friendly error message
251 * if user hasn't given the -c switch properly */
252 for(i = 0; i < 3; i++) {
253 if(cload[i] < 0)
254 die (STATE_UNKNOWN, _("Critical threshold for %d-minute load average is not specified\n"), nums[i]);
255 if(wload[i] < 0)
256 die (STATE_UNKNOWN, _("Warning threshold for %d-minute load average is not specified\n"), nums[i]);
257 if(wload[i] > cload[i])
258 die (STATE_UNKNOWN, _("Parameter inconsistency: %d-minute \"warning load\" is greater than \"critical load\"\n"), nums[i]);
259 }
261 return OK;
262 }
266 void
267 print_help (void)
268 {
269 print_revision (progname, revision);
271 printf ("Copyright (c) 1999 Felipe Gustavo de Almeida <galmeida@linux.ime.usp.br>\n");
272 printf (COPYRIGHT, copyright, email);
274 printf (_("This plugin tests the current system load average.\n\n"));
276 print_usage ();
278 printf (_(UT_HELP_VRSN));
280 printf (_("\
281 -w, --warning=WLOAD1,WLOAD5,WLOAD15\n\
282 Exit with WARNING status if load average exceeds WLOADn\n\
283 -c, --critical=CLOAD1,CLOAD5,CLOAD15\n\
284 Exit with CRITICAL status if load average exceed CLOADn\n\n\
285 the load average format is the same used by \"uptime\" and \"w\"\n\n"));
287 printf (_(UT_SUPPORT));
288 }
290 void
291 print_usage (void)
292 {
293 printf ("Usage: %s -w WLOAD1,WLOAD5,WLOAD15 -c CLOAD1,CLOAD5,CLOAD15\n", progname);
294 }