1 /*****************************************************************************
2 *
3 * utils.c
4 *
5 * Library of useful functions for plugins
6 *
7 * Copyright (c) 2000 Karl DeBisschop (karl@debisschop.net)
8 * License: GPL
9 *
10 * $Revision$
11 * $Date$
12 ****************************************************************************/
14 #define LOCAL_TIMEOUT_ALARM_HANDLER
16 #include "config.h"
17 #include "common.h"
18 #include "utils.h"
19 #include <stdarg.h>
20 #include <limits.h>
22 #include <arpa/inet.h>
24 extern void print_usage (void);
25 extern const char *progname;
27 #define STRLEN 64
28 #define TXTBLK 128
30 /* **************************************************************************
31 * max_state(STATE_x, STATE_y)
32 * compares STATE_x to STATE_y and returns result based on the following
33 * STATE_UNKNOWN < STATE_OK < STATE_WARNING < STATE_CRITICAL
34 *
35 * Note that numerically the above does not hold
36 ****************************************************************************/
38 int
39 max_state (int a, int b)
40 {
41 if (a == STATE_CRITICAL || b == STATE_CRITICAL)
42 return STATE_CRITICAL;
43 else if (a == STATE_WARNING || b == STATE_WARNING)
44 return STATE_WARNING;
45 else if (a == STATE_OK || b == STATE_OK)
46 return STATE_OK;
47 else if (a == STATE_UNKNOWN || b == STATE_UNKNOWN)
48 return STATE_UNKNOWN;
49 else if (a == STATE_DEPENDENT || b == STATE_DEPENDENT)
50 return STATE_DEPENDENT;
51 else
52 return max (a, b);
53 }
55 void usage (char *msg)
56 {
57 printf ("%s", msg);
58 print_usage ();
59 exit (STATE_UNKNOWN);
60 }
62 void usage2(char *msg, char *arg)
63 {
64 printf ("%s: %s - %s\n",progname,msg,arg);
65 print_usage ();
66 exit (STATE_UNKNOWN);
67 }
69 void
70 usage3 (char *msg, int arg)
71 {
72 printf ("%s: %s - %c\n", progname, msg, arg);
73 print_usage();
74 exit (STATE_UNKNOWN);
75 }
78 void
79 support (void)
80 {
81 printf (_("\n\
82 Send email to nagios-users@lists.sourceforge.net if you have questions\n\
83 regarding use of this software. To submit patches or suggest improvements,\n\
84 send email to nagiosplug-devel@lists.sourceforge.net\n"));
85 }
88 char *
89 clean_revstring (const char *revstring)
90 {
91 char plugin_revision[STRLEN];
92 if (sscanf (revstring,"$Revision: %[0-9.]",plugin_revision) == 1)
93 return strscpy (NULL, plugin_revision);
94 else
95 return strscpy (NULL, "N/A");
96 }
98 void
99 print_revision (const char *command_name, const char *revision_string)
100 {
101 char plugin_revision[STRLEN];
103 if (sscanf (revision_string, "$Revision: %[0-9.]", plugin_revision) != 1)
104 strncpy (plugin_revision, "N/A", STRLEN);
105 printf ("%s (%s %s) %s\n",
106 command_name, PACKAGE, VERSION, plugin_revision);
107 printf (_("\
108 The nagios plugins come with ABSOLUTELY NO WARRANTY. You may redistribute\n\
109 copies of the plugins under the terms of the GNU General Public License.\n\
110 For more information about these matters, see the file named COPYING.\n"));
112 }
114 const char *
115 state_text (int result)
116 {
117 switch (result) {
118 case STATE_OK:
119 return "OK";
120 case STATE_WARNING:
121 return "WARNING";
122 case STATE_CRITICAL:
123 return "CRITICAL";
124 case STATE_DEPENDENT:
125 return "DEPENDENT";
126 default:
127 return "UNKNOWN";
128 }
129 }
131 void
132 die (int result, const char *fmt, ...)
133 {
134 va_list ap;
135 va_start (ap, fmt);
136 vprintf (fmt, ap);
137 va_end (ap);
138 exit (result);
139 }
141 void
142 timeout_alarm_handler (int signo)
143 {
144 if (signo == SIGALRM) {
145 printf ("CRITICAL - Plugin timed out after %d seconds\n",
146 timeout_interval);
147 exit (STATE_CRITICAL);
148 }
149 }
151 int
152 is_numeric (char *number)
153 {
154 char tmp[1];
155 float x;
157 if (!number)
158 return FALSE;
159 else if (sscanf (number, "%f%c", &x, tmp) == 1)
160 return TRUE;
161 else
162 return FALSE;
163 }
165 int
166 is_positive (char *number)
167 {
168 if (is_numeric (number) && atof (number) > 0.0)
169 return TRUE;
170 else
171 return FALSE;
172 }
174 int
175 is_negative (char *number)
176 {
177 if (is_numeric (number) && atof (number) < 0.0)
178 return TRUE;
179 else
180 return FALSE;
181 }
183 int
184 is_nonnegative (char *number)
185 {
186 if (is_numeric (number) && atof (number) >= 0.0)
187 return TRUE;
188 else
189 return FALSE;
190 }
192 int
193 is_percentage (char *number)
194 {
195 int x;
196 if (is_numeric (number) && (x = atof (number)) >= 0 && x <= 100)
197 return TRUE;
198 else
199 return FALSE;
200 }
202 int
203 is_integer (char *number)
204 {
205 long int n;
207 if (!number || (strspn (number, "-0123456789 ") != strlen (number)))
208 return FALSE;
210 n = strtol (number, NULL, 10);
212 if (errno != ERANGE && n >= INT_MIN && n <= INT_MAX)
213 return TRUE;
214 else
215 return FALSE;
216 }
218 int
219 is_intpos (char *number)
220 {
221 if (is_integer (number) && atoi (number) > 0)
222 return TRUE;
223 else
224 return FALSE;
225 }
227 int
228 is_intneg (char *number)
229 {
230 if (is_integer (number) && atoi (number) < 0)
231 return TRUE;
232 else
233 return FALSE;
234 }
236 int
237 is_intnonneg (char *number)
238 {
239 if (is_integer (number) && atoi (number) >= 0)
240 return TRUE;
241 else
242 return FALSE;
243 }
245 int
246 is_intpercent (char *number)
247 {
248 int i;
249 if (is_integer (number) && (i = atoi (number)) >= 0 && i <= 100)
250 return TRUE;
251 else
252 return FALSE;
253 }
255 int
256 is_option (char *str)
257 {
258 if (!str)
259 return FALSE;
260 else if (strspn (str, "-") == 1 || strspn (str, "-") == 2)
261 return TRUE;
262 else
263 return FALSE;
264 }
268 #ifdef NEED_GETTIMEOFDAY
269 int
270 gettimeofday (struct timeval *tv, struct timezone *tz)
271 {
272 tv->tv_usec = 0;
273 tv->tv_sec = (long) time ((time_t) 0);
274 }
275 #endif
279 double
280 delta_time (struct timeval tv)
281 {
282 struct timeval now;
284 gettimeofday (&now, NULL);
285 return ((double)(now.tv_sec - tv.tv_sec) + (double)(now.tv_usec - tv.tv_usec) / (double)1000000);
286 }
290 long
291 deltime (struct timeval tv)
292 {
293 struct timeval now;
294 gettimeofday (&now, NULL);
295 return (now.tv_sec - tv.tv_sec)*1000000 + now.tv_usec - tv.tv_usec;
296 }
301 void
302 strip (char *buffer)
303 {
304 size_t x;
305 int i;
307 for (x = strlen (buffer); x >= 1; x--) {
308 i = x - 1;
309 if (buffer[i] == ' ' ||
310 buffer[i] == '\r' || buffer[i] == '\n' || buffer[i] == '\t')
311 buffer[i] = '\0';
312 else
313 break;
314 }
315 return;
316 }
322 /******************************************************************************
323 *
324 * Copies one string to another. Any previously existing data in
325 * the destination string is lost.
326 *
327 * Example:
328 *
329 * char *str=NULL;
330 * str = strscpy("This is a line of text with no trailing newline");
331 *
332 *****************************************************************************/
334 char *
335 strscpy (char *dest, const char *src)
336 {
337 if (src == NULL)
338 return NULL;
340 asprintf (&dest, "%s", src);
342 return dest;
343 }
349 /******************************************************************************
350 *
351 * Returns a pointer to the next line of a multiline string buffer
352 *
353 * Given a pointer string, find the text following the next sequence
354 * of \r and \n characters. This has the effect of skipping blank
355 * lines as well
356 *
357 * Example:
358 *
359 * Given text as follows:
360 *
361 * ==============================
362 * This
363 * is
364 * a
365 *
366 * multiline string buffer
367 * ==============================
368 *
369 * int i=0;
370 * char *str=NULL;
371 * char *ptr=NULL;
372 * str = strscpy(str,"This\nis\r\na\n\nmultiline string buffer\n");
373 * ptr = str;
374 * while (ptr) {
375 * printf("%d %s",i++,firstword(ptr));
376 * ptr = strnl(ptr);
377 * }
378 *
379 * Produces the following:
380 *
381 * 1 This
382 * 2 is
383 * 3 a
384 * 4 multiline
385 *
386 * NOTE: The 'firstword()' function is conceptual only and does not
387 * exist in this package.
388 *
389 * NOTE: Although the second 'ptr' variable is not strictly needed in
390 * this example, it is good practice with these utilities. Once
391 * the * pointer is advance in this manner, it may no longer be
392 * handled with * realloc(). So at the end of the code fragment
393 * above, * strscpy(str,"foo") work perfectly fine, but
394 * strscpy(ptr,"foo") will * cause the the program to crash with
395 * a segmentation fault.
396 *
397 *****************************************************************************/
399 char *
400 strnl (char *str)
401 {
402 size_t len;
403 if (str == NULL)
404 return NULL;
405 str = strpbrk (str, "\r\n");
406 if (str == NULL)
407 return NULL;
408 len = strspn (str, "\r\n");
409 if (str[len] == '\0')
410 return NULL;
411 str += len;
412 if (strlen (str) == 0)
413 return NULL;
414 return str;
415 }
421 /******************************************************************************
422 *
423 * Like strscpy, except only the portion of the source string up to
424 * the provided delimiter is copied.
425 *
426 * Example:
427 *
428 * str = strpcpy(str,"This is a line of text with no trailing newline","x");
429 * printf("%s\n",str);
430 *
431 * Produces:
432 *
433 *This is a line of te
434 *
435 *****************************************************************************/
437 char *
438 strpcpy (char *dest, const char *src, const char *str)
439 {
440 size_t len;
442 if (src)
443 len = strcspn (src, str);
444 else
445 return NULL;
447 if (dest == NULL || strlen (dest) < len)
448 dest = realloc (dest, len + 1);
449 if (dest == NULL)
450 die (STATE_UNKNOWN, "failed realloc in strpcpy\n");
452 strncpy (dest, src, len);
453 dest[len] = '\0';
455 return dest;
456 }
462 /******************************************************************************
463 *
464 * Like strscat, except only the portion of the source string up to
465 * the provided delimiter is copied.
466 *
467 * str = strpcpy(str,"This is a line of text with no trailing newline","x");
468 * str = strpcat(str,"This is a line of text with no trailing newline","x");
469 * printf("%s\n",str);
470 *
471 *This is a line of texThis is a line of tex
472 *
473 *****************************************************************************/
475 char *
476 strpcat (char *dest, const char *src, const char *str)
477 {
478 size_t len, l2;
480 if (dest)
481 len = strlen (dest);
482 else
483 len = 0;
485 if (src) {
486 l2 = strcspn (src, str);
487 }
488 else {
489 return dest;
490 }
492 dest = realloc (dest, len + l2 + 1);
493 if (dest == NULL)
494 die (STATE_UNKNOWN, "failed malloc in strscat\n");
496 strncpy (dest + len, src, l2);
497 dest[len + l2] = '\0';
499 return dest;
500 }