summaryrefslogtreecommitdiffstats
path: root/plugins/utils.c
blob: c2261dc39477d3d140e1a83513257656791082c0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
/*****************************************************************************
 *
 * utils.c
 *
 * Library of useful functions for plugins
 *
 * Copyright (c) 2000 Karl DeBisschop (karl@debisschop.net)
 * License: GPL
 *
 * $Revision$
 * $Date$
 ****************************************************************************/

#define LOCAL_TIMEOUT_ALARM_HANDLER

#include "config.h"
#include "common.h"
#include "utils.h"
#include <stdarg.h>
#include <limits.h>

#include <arpa/inet.h>

extern void print_usage (void);
extern const char *progname;

#define STRLEN 64
#define TXTBLK 128

/* **************************************************************************
 * max_state(STATE_x, STATE_y)
 * compares STATE_x to  STATE_y and returns result based on the following
 * STATE_UNKNOWN < STATE_OK < STATE_WARNING < STATE_CRITICAL
 *
 * Note that numerically the above does not hold
 ****************************************************************************/

int
max_state (int a, int b)
{
	if (a == STATE_CRITICAL || b == STATE_CRITICAL)
		return STATE_CRITICAL;
	else if (a == STATE_WARNING || b == STATE_WARNING)
		return STATE_WARNING;
	else if (a == STATE_OK || b == STATE_OK)
		return STATE_OK;
	else if (a == STATE_UNKNOWN || b == STATE_UNKNOWN)
		return STATE_UNKNOWN;
	else if (a == STATE_DEPENDENT || b == STATE_DEPENDENT)
		return STATE_DEPENDENT;
	else
		return max (a, b);
}

void usage (char *msg)
{
	printf ("%s", msg);
	print_usage ();
	exit (STATE_UNKNOWN);
}

void usage2(char *msg, char *arg)
{
	printf ("%s: %s - %s\n",progname,msg,arg);
	print_usage ();
	exit (STATE_UNKNOWN);
}

void
usage3 (char *msg, int arg)
{
	printf ("%s: %s - %c\n", progname, msg, arg);
	print_usage();
	exit (STATE_UNKNOWN);
}


void
support (void)
{
	printf (_("\n\
Send email to nagios-users@lists.sourceforge.net if you have questions\n\
regarding use of this software. To submit patches or suggest improvements,\n\
send email to nagiosplug-devel@lists.sourceforge.net\n"));
}


char *
clean_revstring (const char *revstring)
{
	char plugin_revision[STRLEN];
	if (sscanf (revstring,"$Revision: %[0-9.]",plugin_revision) == 1)
		return strscpy (NULL, plugin_revision);
	else
	  return strscpy (NULL, "N/A");
}

void
print_revision (const char *command_name, const char *revision_string)
{
	char plugin_revision[STRLEN];

	if (sscanf (revision_string, "$Revision: %[0-9.]", plugin_revision) != 1)
		strncpy (plugin_revision, "N/A", STRLEN);
	printf ("%s (%s %s) %s\n",
					command_name, PACKAGE, VERSION, plugin_revision);
	printf (_("\
The nagios plugins come with ABSOLUTELY NO WARRANTY. You may redistribute\n\
copies of the plugins under the terms of the GNU General Public License.\n\
For more information about these matters, see the file named COPYING.\n"));

}

const char *
state_text (int result)
{
	switch (result) {
	case STATE_OK:
		return "OK";
	case STATE_WARNING:
		return "WARNING";
	case STATE_CRITICAL:
		return "CRITICAL";
	case STATE_DEPENDENT:
		return "DEPENDENT";
	default:
		return "UNKNOWN";
	}
}

void
die (int result, const char *fmt, ...)
{
	va_list ap;
	va_start (ap, fmt);
	vprintf (fmt, ap);
	va_end (ap);
	exit (result);
}

void
timeout_alarm_handler (int signo)
{
	if (signo == SIGALRM) {
		printf ("CRITICAL - Plugin timed out after %d seconds\n",
						timeout_interval);
		exit (STATE_CRITICAL);
	}
}

int
is_numeric (char *number)
{
	char tmp[1];
	float x;

	if (!number)
		return FALSE;
	else if (sscanf (number, "%f%c", &x, tmp) == 1)
		return TRUE;
	else
		return FALSE;
}

int
is_positive (char *number)
{
	if (is_numeric (number) && atof (number) > 0.0)
		return TRUE;
	else
		return FALSE;
}

int
is_negative (char *number)
{
	if (is_numeric (number) && atof (number) < 0.0)
		return TRUE;
	else
		return FALSE;
}

int
is_nonnegative (char *number)
{
	if (is_numeric (number) && atof (number) >= 0.0)
		return TRUE;
	else
		return FALSE;
}

int
is_percentage (char *number)
{
	int x;
	if (is_numeric (number) && (x = atof (number)) >= 0 && x <= 100)
		return TRUE;
	else
		return FALSE;
}

int
is_integer (char *number)
{
	long int n;

	if (!number || (strspn (number, "-0123456789 ") != strlen (number)))
		return FALSE;

	n = strtol (number, NULL, 10);

	if (errno != ERANGE && n >= INT_MIN && n <= INT_MAX)
		return TRUE;
	else
		return FALSE;
}

int
is_intpos (char *number)
{
	if (is_integer (number) && atoi (number) > 0)
		return TRUE;
	else
		return FALSE;
}

int
is_intneg (char *number)
{
	if (is_integer (number) && atoi (number) < 0)
		return TRUE;
	else
		return FALSE;
}

int
is_intnonneg (char *number)
{
	if (is_integer (number) && atoi (number) >= 0)
		return TRUE;
	else
		return FALSE;
}

int
is_intpercent (char *number)
{
	int i;
	if (is_integer (number) && (i = atoi (number)) >= 0 && i <= 100)
		return TRUE;
	else
		return FALSE;
}

int
is_option (char *str)
{
	if (!str)
		return FALSE;
	else if (strspn (str, "-") == 1 || strspn (str, "-") == 2)
		return TRUE;
	else
		return FALSE;
}



#ifdef NEED_GETTIMEOFDAY
int
gettimeofday (struct timeval *tv, struct timezone *tz)
{
	tv->tv_usec = 0;
	tv->tv_sec = (long) time ((time_t) 0);
}
#endif



double
delta_time (struct timeval tv)
{
	struct timeval now;

	gettimeofday (&now, NULL);
	return ((double)(now.tv_sec - tv.tv_sec) + (double)(now.tv_usec - tv.tv_usec) / (double)1000000);
}




void
strip (char *buffer)
{
	size_t x;
	int i;

	for (x = strlen (buffer); x >= 1; x--) {
		i = x - 1;
		if (buffer[i] == ' ' ||
				buffer[i] == '\r' || buffer[i] == '\n' || buffer[i] == '\t')
			buffer[i] = '\0';
		else
			break;
	}
	return;
}





/******************************************************************************
 *
 * Copies one string to another. Any previously existing data in
 * the destination string is lost.
 *
 * Example:
 *
 * char *str=NULL;
 * str = strscpy("This is a line of text with no trailing newline");
 *
 *****************************************************************************/

char *
strscpy (char *dest, const char *src)
{
	if (src == NULL)
		return NULL;

	asprintf (&dest, "%s", src);

	return dest;
}





/******************************************************************************
 *
 * Returns a pointer to the next line of a multiline string buffer
 *
 * Given a pointer string, find the text following the next sequence
 * of \r and \n characters. This has the effect of skipping blank
 * lines as well
 *
 * Example:
 *
 * Given text as follows:
 *
 * ==============================
 * This
 * is
 * a
 * 
 * multiline string buffer
 * ==============================
 *
 * int i=0;
 * char *str=NULL;
 * char *ptr=NULL;
 * str = strscpy(str,"This\nis\r\na\n\nmultiline string buffer\n");
 * ptr = str;
 * while (ptr) {
 *   printf("%d %s",i++,firstword(ptr));
 *   ptr = strnl(ptr);
 * }
 * 
 * Produces the following:
 *
 * 1 This
 * 2 is
 * 3 a
 * 4 multiline
 *
 * NOTE: The 'firstword()' function is conceptual only and does not
 *       exist in this package.
 *
 * NOTE: Although the second 'ptr' variable is not strictly needed in
 *       this example, it is good practice with these utilities. Once
 *       the * pointer is advance in this manner, it may no longer be
 *       handled with * realloc(). So at the end of the code fragment
 *       above, * strscpy(str,"foo") work perfectly fine, but
 *       strscpy(ptr,"foo") will * cause the the program to crash with
 *       a segmentation fault.
 *
 *****************************************************************************/

char *
strnl (char *str)
{
	size_t len;
	if (str == NULL)
		return NULL;
	str = strpbrk (str, "\r\n");
	if (str == NULL)
		return NULL;
	len = strspn (str, "\r\n");
	if (str[len] == '\0')
		return NULL;
	str += len;
	if (strlen (str) == 0)
		return NULL;
	return str;
}





/******************************************************************************
 *
 * Like strscpy, except only the portion of the source string up to
 * the provided delimiter is copied.
 *
 * Example:
 *
 * str = strpcpy(str,"This is a line of text with no trailing newline","x");
 * printf("%s\n",str);
 *
 * Produces:
 *
 *This is a line of te
 *
 *****************************************************************************/

char *
strpcpy (char *dest, const char *src, const char *str)
{
	size_t len;

	if (src)
		len = strcspn (src, str);
	else
		return NULL;

	if (dest == NULL || strlen (dest) < len)
		dest = realloc (dest, len + 1);
	if (dest == NULL)
		die (STATE_UNKNOWN, "failed realloc in strpcpy\n");

	strncpy (dest, src, len);
	dest[len] = '\0';

	return dest;
}





/******************************************************************************
 *
 * Like strscat, except only the portion of the source string up to
 * the provided delimiter is copied.
 *
 * str = strpcpy(str,"This is a line of text with no trailing newline","x");
 * str = strpcat(str,"This is a line of text with no trailing newline","x");
 * printf("%s\n",str);
 * 
 *This is a line of texThis is a line of tex
 *
 *****************************************************************************/

char *
strpcat (char *dest, const char *src, const char *str)
{
	size_t len, l2;

	if (dest)
		len = strlen (dest);
	else
		len = 0;

	if (src) {
		l2 = strcspn (src, str);
	}
	else {
		return dest;
	}

	dest = realloc (dest, len + l2 + 1);
	if (dest == NULL)
		die (STATE_UNKNOWN, "failed malloc in strscat\n");

	strncpy (dest + len, src, l2);
	dest[len + l2] = '\0';

	return dest;
}