1 /**
2 * collectd - src/common.c
3 * Copyright (C) 2005-2009 Florian octo Forster
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; only version 2 of the License is applicable.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 *
18 * Authors:
19 * Florian octo Forster <octo at verplant.org>
20 * Niki W. Waibel <niki.waibel@gmx.net>
21 * Sebastian Harl <sh at tokkee.org>
22 * Michał Mirosław <mirq-linux at rere.qmqm.pl>
23 **/
25 #if HAVE_CONFIG_H
26 # include "config.h"
27 #endif
29 #include "collectd.h"
30 #include "common.h"
31 #include "plugin.h"
33 #if HAVE_PTHREAD_H
34 # include <pthread.h>
35 #endif
37 #ifdef HAVE_MATH_H
38 # include <math.h>
39 #endif
41 /* for ntohl and htonl */
42 #if HAVE_ARPA_INET_H
43 # include <arpa/inet.h>
44 #endif
46 /* for getaddrinfo */
47 #include <sys/types.h>
48 #include <sys/socket.h>
49 #include <netdb.h>
51 #if HAVE_NETINET_IN_H
52 # include <netinet/in.h>
53 #endif
55 #ifdef HAVE_LIBKSTAT
56 extern kstat_ctl_t *kc;
57 #endif
59 #if !HAVE_GETPWNAM_R
60 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
61 #endif
63 #if !HAVE_STRERROR_R
64 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
65 #endif
67 char *sstrncpy (char *dest, const char *src, size_t n)
68 {
69 strncpy (dest, src, n);
70 dest[n - 1] = '\0';
72 return (dest);
73 } /* char *sstrncpy */
75 int ssnprintf (char *dest, size_t n, const char *format, ...)
76 {
77 int ret = 0;
78 va_list ap;
80 va_start (ap, format);
81 ret = vsnprintf (dest, n, format, ap);
82 dest[n - 1] = '\0';
83 va_end (ap);
85 return (ret);
86 } /* int ssnprintf */
88 char *sstrdup (const char *s)
89 {
90 char *r;
91 size_t sz;
93 if (s == NULL)
94 return (NULL);
96 /* Do not use `strdup' here, because it's not specified in POSIX. It's
97 * ``only'' an XSI extension. */
98 sz = strlen (s) + 1;
99 r = (char *) malloc (sizeof (char) * sz);
100 if (r == NULL)
101 {
102 ERROR ("sstrdup: Out of memory.");
103 exit (3);
104 }
105 memcpy (r, s, sizeof (char) * sz);
107 return (r);
108 } /* char *sstrdup */
110 /* Even though Posix requires "strerror_r" to return an "int",
111 * some systems (e.g. the GNU libc) return a "char *" _and_
112 * ignore the second argument ... -tokkee */
113 char *sstrerror (int errnum, char *buf, size_t buflen)
114 {
115 buf[0] = '\0';
117 #if !HAVE_STRERROR_R
118 {
119 char *temp;
121 pthread_mutex_lock (&strerror_r_lock);
123 temp = strerror (errnum);
124 sstrncpy (buf, temp, buflen);
126 pthread_mutex_unlock (&strerror_r_lock);
127 }
128 /* #endif !HAVE_STRERROR_R */
130 #elif STRERROR_R_CHAR_P
131 {
132 char *temp;
133 temp = strerror_r (errnum, buf, buflen);
134 if (buf[0] == '\0')
135 {
136 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
137 sstrncpy (buf, temp, buflen);
138 else
139 sstrncpy (buf, "strerror_r did not return "
140 "an error message", buflen);
141 }
142 }
143 /* #endif STRERROR_R_CHAR_P */
145 #else
146 if (strerror_r (errnum, buf, buflen) != 0)
147 {
148 ssnprintf (buf, buflen, "Error #%i; "
149 "Additionally, strerror_r failed.",
150 errnum);
151 }
152 #endif /* STRERROR_R_CHAR_P */
154 return (buf);
155 } /* char *sstrerror */
157 void *smalloc (size_t size)
158 {
159 void *r;
161 if ((r = malloc (size)) == NULL)
162 {
163 ERROR ("Not enough memory.");
164 exit (3);
165 }
167 return (r);
168 } /* void *smalloc */
170 #if 0
171 void sfree (void **ptr)
172 {
173 if (ptr == NULL)
174 return;
176 if (*ptr != NULL)
177 free (*ptr);
179 *ptr = NULL;
180 }
181 #endif
183 ssize_t sread (int fd, void *buf, size_t count)
184 {
185 char *ptr;
186 size_t nleft;
187 ssize_t status;
189 ptr = (char *) buf;
190 nleft = count;
192 while (nleft > 0)
193 {
194 status = read (fd, (void *) ptr, nleft);
196 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
197 continue;
199 if (status < 0)
200 return (status);
202 if (status == 0)
203 {
204 DEBUG ("Received EOF from fd %i. "
205 "Closing fd and returning error.",
206 fd);
207 close (fd);
208 return (-1);
209 }
211 assert ((0 > status) || (nleft >= (size_t)status));
213 nleft = nleft - status;
214 ptr = ptr + status;
215 }
217 return (0);
218 }
221 ssize_t swrite (int fd, const void *buf, size_t count)
222 {
223 const char *ptr;
224 size_t nleft;
225 ssize_t status;
227 ptr = (const char *) buf;
228 nleft = count;
230 while (nleft > 0)
231 {
232 status = write (fd, (const void *) ptr, nleft);
234 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
235 continue;
237 if (status < 0)
238 return (status);
240 nleft = nleft - status;
241 ptr = ptr + status;
242 }
244 return (0);
245 }
247 int strsplit (char *string, char **fields, size_t size)
248 {
249 size_t i;
250 char *ptr;
251 char *saveptr;
253 i = 0;
254 ptr = string;
255 saveptr = NULL;
256 while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
257 {
258 ptr = NULL;
259 i++;
261 if (i >= size)
262 break;
263 }
265 return ((int) i);
266 }
268 int strjoin (char *dst, size_t dst_len,
269 char **fields, size_t fields_num,
270 const char *sep)
271 {
272 size_t field_len;
273 size_t sep_len;
274 int i;
276 memset (dst, '\0', dst_len);
278 if (fields_num <= 0)
279 return (-1);
281 sep_len = 0;
282 if (sep != NULL)
283 sep_len = strlen (sep);
285 for (i = 0; i < (int)fields_num; i++)
286 {
287 if ((i > 0) && (sep_len > 0))
288 {
289 if (dst_len <= sep_len)
290 return (-1);
292 strncat (dst, sep, dst_len);
293 dst_len -= sep_len;
294 }
296 field_len = strlen (fields[i]);
298 if (dst_len <= field_len)
299 return (-1);
301 strncat (dst, fields[i], dst_len);
302 dst_len -= field_len;
303 }
305 return (strlen (dst));
306 }
308 int strsubstitute (char *str, char c_from, char c_to)
309 {
310 int ret;
312 if (str == NULL)
313 return (-1);
315 ret = 0;
316 while (*str != '\0')
317 {
318 if (*str == c_from)
319 {
320 *str = c_to;
321 ret++;
322 }
323 str++;
324 }
326 return (ret);
327 } /* int strsubstitute */
329 int strunescape (char *buf, size_t buf_len)
330 {
331 size_t i;
333 for (i = 0; (i < buf_len) && (buf[i] != '\0'); ++i)
334 {
335 if (buf[i] != '\\')
336 continue;
338 if ((i >= buf_len) || (buf[i + 1] == '\0')) {
339 ERROR ("string unescape: backslash found at end of string.");
340 return (-1);
341 }
343 switch (buf[i + 1]) {
344 case 't':
345 buf[i] = '\t';
346 break;
347 case 'n':
348 buf[i] = '\n';
349 break;
350 case 'r':
351 buf[i] = '\r';
352 break;
353 default:
354 buf[i] = buf[i + 1];
355 break;
356 }
358 memmove (buf + i + 1, buf + i + 2, buf_len - i - 2);
359 }
360 return (0);
361 } /* int strunescape */
363 int escape_slashes (char *buf, int buf_len)
364 {
365 int i;
367 if (strcmp (buf, "/") == 0)
368 {
369 if (buf_len < 5)
370 return (-1);
372 strncpy (buf, "root", buf_len);
373 return (0);
374 }
376 if (buf_len <= 1)
377 return (0);
379 /* Move one to the left */
380 if (buf[0] == '/')
381 memmove (buf, buf + 1, buf_len - 1);
383 for (i = 0; i < buf_len - 1; i++)
384 {
385 if (buf[i] == '\0')
386 break;
387 else if (buf[i] == '/')
388 buf[i] = '_';
389 }
390 buf[i] = '\0';
392 return (0);
393 } /* int escape_slashes */
395 void replace_special (char *buffer, size_t buffer_size)
396 {
397 size_t i;
399 for (i = 0; i < buffer_size; i++)
400 {
401 if (buffer[i] == 0)
402 return;
403 if ((!isalnum ((int) buffer[i])) && (buffer[i] != '-'))
404 buffer[i] = '_';
405 }
406 } /* void replace_special */
408 int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
409 {
410 struct timeval *larger;
411 struct timeval *smaller;
413 int status;
415 NORMALIZE_TIMEVAL (tv0);
416 NORMALIZE_TIMEVAL (tv1);
418 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
419 {
420 if (delta != NULL) {
421 delta->tv_sec = 0;
422 delta->tv_usec = 0;
423 }
424 return (0);
425 }
427 if ((tv0.tv_sec < tv1.tv_sec)
428 || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
429 {
430 larger = &tv1;
431 smaller = &tv0;
432 status = -1;
433 }
434 else
435 {
436 larger = &tv0;
437 smaller = &tv1;
438 status = 1;
439 }
441 if (delta != NULL) {
442 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
444 if (smaller->tv_usec <= larger->tv_usec)
445 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
446 else
447 {
448 --delta->tv_sec;
449 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
450 }
451 }
453 assert ((delta == NULL)
454 || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
456 return (status);
457 } /* int timeval_cmp */
459 int check_create_dir (const char *file_orig)
460 {
461 struct stat statbuf;
463 char file_copy[512];
464 char dir[512];
465 int dir_len = 512;
466 char *fields[16];
467 int fields_num;
468 char *ptr;
469 char *saveptr;
470 int last_is_file = 1;
471 int path_is_absolute = 0;
472 size_t len;
473 int i;
475 /*
476 * Sanity checks first
477 */
478 if (file_orig == NULL)
479 return (-1);
481 if ((len = strlen (file_orig)) < 1)
482 return (-1);
483 else if (len >= sizeof (file_copy))
484 return (-1);
486 /*
487 * If `file_orig' ends in a slash the last component is a directory,
488 * otherwise it's a file. Act accordingly..
489 */
490 if (file_orig[len - 1] == '/')
491 last_is_file = 0;
492 if (file_orig[0] == '/')
493 path_is_absolute = 1;
495 /*
496 * Create a copy for `strtok_r' to destroy
497 */
498 sstrncpy (file_copy, file_orig, sizeof (file_copy));
500 /*
501 * Break into components. This will eat up several slashes in a row and
502 * remove leading and trailing slashes..
503 */
504 ptr = file_copy;
505 saveptr = NULL;
506 fields_num = 0;
507 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
508 {
509 ptr = NULL;
510 fields_num++;
512 if (fields_num >= 16)
513 break;
514 }
516 /*
517 * For each component, do..
518 */
519 for (i = 0; i < (fields_num - last_is_file); i++)
520 {
521 /*
522 * Do not create directories that start with a dot. This
523 * prevents `../../' attacks and other likely malicious
524 * behavior.
525 */
526 if (fields[i][0] == '.')
527 {
528 ERROR ("Cowardly refusing to create a directory that "
529 "begins with a `.' (dot): `%s'", file_orig);
530 return (-2);
531 }
533 /*
534 * Join the components together again
535 */
536 dir[0] = '/';
537 if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute,
538 fields, i + 1, "/") < 0)
539 {
540 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
541 return (-1);
542 }
544 while (42) {
545 if (stat (dir, &statbuf) == -1)
546 {
547 if (errno == ENOENT)
548 {
549 if (mkdir (dir, 0755) == 0)
550 break;
552 /* this might happen, if a different thread created
553 * the directory in the meantime
554 * => call stat() again to check for S_ISDIR() */
555 if (EEXIST == errno)
556 continue;
558 char errbuf[1024];
559 ERROR ("check_create_dir: mkdir (%s): %s", dir,
560 sstrerror (errno,
561 errbuf, sizeof (errbuf)));
562 return (-1);
563 }
564 else
565 {
566 char errbuf[1024];
567 ERROR ("check_create_dir: stat (%s): %s", dir,
568 sstrerror (errno, errbuf,
569 sizeof (errbuf)));
570 return (-1);
571 }
572 }
573 else if (!S_ISDIR (statbuf.st_mode))
574 {
575 ERROR ("check_create_dir: `%s' exists but is not "
576 "a directory!", dir);
577 return (-1);
578 }
579 break;
580 }
581 }
583 return (0);
584 } /* check_create_dir */
586 #ifdef HAVE_LIBKSTAT
587 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
588 {
589 char ident[128];
591 *ksp_ptr = NULL;
593 if (kc == NULL)
594 return (-1);
596 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
598 *ksp_ptr = kstat_lookup (kc, module, instance, name);
599 if (*ksp_ptr == NULL)
600 {
601 ERROR ("get_kstat: Cound not find kstat %s", ident);
602 return (-1);
603 }
605 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
606 {
607 ERROR ("get_kstat: kstat %s has wrong type", ident);
608 *ksp_ptr = NULL;
609 return (-1);
610 }
612 #ifdef assert
613 assert (*ksp_ptr != NULL);
614 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
615 #endif
617 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
618 {
619 ERROR ("get_kstat: kstat %s could not be read", ident);
620 return (-1);
621 }
623 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
624 {
625 ERROR ("get_kstat: kstat %s has wrong type", ident);
626 return (-1);
627 }
629 return (0);
630 }
632 long long get_kstat_value (kstat_t *ksp, char *name)
633 {
634 kstat_named_t *kn;
635 long long retval = -1LL;
637 #ifdef assert
638 assert (ksp != NULL);
639 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
640 #else
641 if (ksp == NULL)
642 {
643 ERROR ("ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
644 return (-1LL);
645 }
646 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
647 {
648 ERROR ("ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
649 return (-1LL);
650 }
651 #endif
653 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
654 return (retval);
656 if (kn->data_type == KSTAT_DATA_INT32)
657 retval = (long long) kn->value.i32;
658 else if (kn->data_type == KSTAT_DATA_UINT32)
659 retval = (long long) kn->value.ui32;
660 else if (kn->data_type == KSTAT_DATA_INT64)
661 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
662 else if (kn->data_type == KSTAT_DATA_UINT64)
663 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
664 else
665 WARNING ("get_kstat_value: Not a numeric value: %s", name);
667 return (retval);
668 }
669 #endif /* HAVE_LIBKSTAT */
671 unsigned long long ntohll (unsigned long long n)
672 {
673 #if BYTE_ORDER == BIG_ENDIAN
674 return (n);
675 #else
676 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
677 #endif
678 } /* unsigned long long ntohll */
680 unsigned long long htonll (unsigned long long n)
681 {
682 #if BYTE_ORDER == BIG_ENDIAN
683 return (n);
684 #else
685 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
686 #endif
687 } /* unsigned long long htonll */
689 #if FP_LAYOUT_NEED_NOTHING
690 /* Well, we need nothing.. */
691 /* #endif FP_LAYOUT_NEED_NOTHING */
693 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
694 # if FP_LAYOUT_NEED_ENDIANFLIP
695 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
696 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
697 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
698 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
699 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
700 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
701 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
702 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
703 # else
704 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
705 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
706 # endif
708 double ntohd (double d)
709 {
710 union
711 {
712 uint8_t byte[8];
713 uint64_t integer;
714 double floating;
715 } ret;
717 ret.floating = d;
719 /* NAN in x86 byte order */
720 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
721 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
722 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
723 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
724 {
725 return (NAN);
726 }
727 else
728 {
729 uint64_t tmp;
731 tmp = ret.integer;
732 ret.integer = FP_CONVERT (tmp);
733 return (ret.floating);
734 }
735 } /* double ntohd */
737 double htond (double d)
738 {
739 union
740 {
741 uint8_t byte[8];
742 uint64_t integer;
743 double floating;
744 } ret;
746 if (isnan (d))
747 {
748 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
749 ret.byte[4] = ret.byte[5] = 0x00;
750 ret.byte[6] = 0xf8;
751 ret.byte[7] = 0x7f;
752 return (ret.floating);
753 }
754 else
755 {
756 uint64_t tmp;
758 ret.floating = d;
759 tmp = FP_CONVERT (ret.integer);
760 ret.integer = tmp;
761 return (ret.floating);
762 }
763 } /* double htond */
764 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
766 int format_name (char *ret, int ret_len,
767 const char *hostname,
768 const char *plugin, const char *plugin_instance,
769 const char *type, const char *type_instance)
770 {
771 int status;
773 assert (plugin != NULL);
774 assert (type != NULL);
776 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
777 {
778 if ((type_instance == NULL) || (strlen (type_instance) == 0))
779 status = ssnprintf (ret, ret_len, "%s/%s/%s",
780 hostname, plugin, type);
781 else
782 status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
783 hostname, plugin, type,
784 type_instance);
785 }
786 else
787 {
788 if ((type_instance == NULL) || (strlen (type_instance) == 0))
789 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
790 hostname, plugin, plugin_instance,
791 type);
792 else
793 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
794 hostname, plugin, plugin_instance,
795 type, type_instance);
796 }
798 if ((status < 1) || (status >= ret_len))
799 return (-1);
800 return (0);
801 } /* int format_name */
803 int parse_identifier (char *str, char **ret_host,
804 char **ret_plugin, char **ret_plugin_instance,
805 char **ret_type, char **ret_type_instance)
806 {
807 char *hostname = NULL;
808 char *plugin = NULL;
809 char *plugin_instance = NULL;
810 char *type = NULL;
811 char *type_instance = NULL;
813 hostname = str;
814 if (hostname == NULL)
815 return (-1);
817 plugin = strchr (hostname, '/');
818 if (plugin == NULL)
819 return (-1);
820 *plugin = '\0'; plugin++;
822 type = strchr (plugin, '/');
823 if (type == NULL)
824 return (-1);
825 *type = '\0'; type++;
827 plugin_instance = strchr (plugin, '-');
828 if (plugin_instance != NULL)
829 {
830 *plugin_instance = '\0';
831 plugin_instance++;
832 }
834 type_instance = strchr (type, '-');
835 if (type_instance != NULL)
836 {
837 *type_instance = '\0';
838 type_instance++;
839 }
841 *ret_host = hostname;
842 *ret_plugin = plugin;
843 *ret_plugin_instance = plugin_instance;
844 *ret_type = type;
845 *ret_type_instance = type_instance;
846 return (0);
847 } /* int parse_identifier */
849 int parse_value (const char *value, value_t *ret_value, int ds_type)
850 {
851 char *endptr = NULL;
853 switch (ds_type)
854 {
855 case DS_TYPE_COUNTER:
856 ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
857 break;
859 case DS_TYPE_GAUGE:
860 ret_value->gauge = (gauge_t) strtod (value, &endptr);
861 break;
863 case DS_TYPE_DERIVE:
864 ret_value->counter = (derive_t) strtoll (value, &endptr, 0);
865 break;
867 case DS_TYPE_ABSOLUTE:
868 ret_value->counter = (absolute_t) strtoull (value, &endptr, 0);
869 break;
871 default:
872 ERROR ("parse_value: Invalid data source type: %i.", ds_type);
873 return -1;
874 }
876 if (value == endptr) {
877 ERROR ("parse_value: Failed to parse string as number: %s.", value);
878 return -1;
879 }
880 else if ((NULL != endptr) && ('\0' != *endptr))
881 WARNING ("parse_value: Ignoring trailing garbage after number: %s.",
882 endptr);
883 return 0;
884 } /* int parse_value */
886 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
887 {
888 int i;
889 char *dummy;
890 char *ptr;
891 char *saveptr;
893 i = -1;
894 dummy = buffer;
895 saveptr = NULL;
896 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
897 {
898 dummy = NULL;
900 if (i >= vl->values_len)
901 {
902 /* Make sure i is invalid. */
903 i = vl->values_len + 1;
904 break;
905 }
907 if (i == -1)
908 {
909 if (strcmp ("N", ptr) == 0)
910 vl->time = time (NULL);
911 else
912 vl->time = (time_t) atoi (ptr);
913 }
914 else
915 {
916 if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
917 vl->values[i].gauge = NAN;
918 else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
919 return -1;
920 }
922 i++;
923 } /* while (strtok_r) */
925 if ((ptr != NULL) || (i != vl->values_len))
926 return (-1);
927 return (0);
928 } /* int parse_values */
930 #if !HAVE_GETPWNAM_R
931 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
932 size_t buflen, struct passwd **pwbufp)
933 {
934 int status = 0;
935 struct passwd *pw;
937 memset (pwbuf, '\0', sizeof (struct passwd));
939 pthread_mutex_lock (&getpwnam_r_lock);
941 do
942 {
943 pw = getpwnam (name);
944 if (pw == NULL)
945 {
946 status = (errno != 0) ? errno : ENOENT;
947 break;
948 }
950 #define GETPWNAM_COPY_MEMBER(member) \
951 if (pw->member != NULL) \
952 { \
953 int len = strlen (pw->member); \
954 if (len >= buflen) \
955 { \
956 status = ENOMEM; \
957 break; \
958 } \
959 sstrncpy (buf, pw->member, buflen); \
960 pwbuf->member = buf; \
961 buf += (len + 1); \
962 buflen -= (len + 1); \
963 }
964 GETPWNAM_COPY_MEMBER(pw_name);
965 GETPWNAM_COPY_MEMBER(pw_passwd);
966 GETPWNAM_COPY_MEMBER(pw_gecos);
967 GETPWNAM_COPY_MEMBER(pw_dir);
968 GETPWNAM_COPY_MEMBER(pw_shell);
970 pwbuf->pw_uid = pw->pw_uid;
971 pwbuf->pw_gid = pw->pw_gid;
973 if (pwbufp != NULL)
974 *pwbufp = pwbuf;
975 } while (0);
977 pthread_mutex_unlock (&getpwnam_r_lock);
979 return (status);
980 } /* int getpwnam_r */
981 #endif /* !HAVE_GETPWNAM_R */
983 int notification_init (notification_t *n, int severity, const char *message,
984 const char *host,
985 const char *plugin, const char *plugin_instance,
986 const char *type, const char *type_instance)
987 {
988 memset (n, '\0', sizeof (notification_t));
990 n->severity = severity;
992 if (message != NULL)
993 sstrncpy (n->message, message, sizeof (n->message));
994 if (host != NULL)
995 sstrncpy (n->host, host, sizeof (n->host));
996 if (plugin != NULL)
997 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
998 if (plugin_instance != NULL)
999 sstrncpy (n->plugin_instance, plugin_instance,
1000 sizeof (n->plugin_instance));
1001 if (type != NULL)
1002 sstrncpy (n->type, type, sizeof (n->type));
1003 if (type_instance != NULL)
1004 sstrncpy (n->type_instance, type_instance,
1005 sizeof (n->type_instance));
1007 return (0);
1008 } /* int notification_init */
1010 int walk_directory (const char *dir, dirwalk_callback_f callback,
1011 void *user_data)
1012 {
1013 struct dirent *ent;
1014 DIR *dh;
1015 int success;
1016 int failure;
1018 success = 0;
1019 failure = 0;
1021 if ((dh = opendir (dir)) == NULL)
1022 {
1023 char errbuf[1024];
1024 ERROR ("walk_directory: Cannot open '%s': %s", dir,
1025 sstrerror (errno, errbuf, sizeof (errbuf)));
1026 return -1;
1027 }
1029 while ((ent = readdir (dh)) != NULL)
1030 {
1031 int status;
1033 if (ent->d_name[0] == '.')
1034 continue;
1036 status = (*callback) (dir, ent->d_name, user_data);
1037 if (status != 0)
1038 failure++;
1039 else
1040 success++;
1041 }
1043 closedir (dh);
1045 if ((success == 0) && (failure > 0))
1046 return (-1);
1047 return (0);
1048 }
1050 int read_file_contents (const char *filename, char *buf, int bufsize)
1051 {
1052 FILE *fh;
1053 int n;
1055 if ((fh = fopen (filename, "r")) == NULL)
1056 return -1;
1058 n = fread(buf, 1, bufsize, fh);
1059 fclose(fh);
1061 return n;
1062 }
1064 counter_t counter_diff (counter_t old_value, counter_t new_value)
1065 {
1066 counter_t diff;
1068 if (old_value > new_value)
1069 {
1070 if (old_value <= 4294967295U)
1071 diff = (4294967295U - old_value) + new_value;
1072 else
1073 diff = (18446744073709551615ULL - old_value)
1074 + new_value;
1075 }
1076 else
1077 {
1078 diff = new_value - old_value;
1079 }
1081 return (diff);
1082 } /* counter_t counter_to_gauge */
1084 int service_name_to_port_number (const char *service_name)
1085 {
1086 struct addrinfo *ai_list;
1087 struct addrinfo *ai_ptr;
1088 struct addrinfo ai_hints;
1089 int status;
1090 int service_number;
1092 if (service_name == NULL)
1093 return (-1);
1095 ai_list = NULL;
1096 memset (&ai_hints, 0, sizeof (ai_hints));
1097 ai_hints.ai_family = AF_UNSPEC;
1099 status = getaddrinfo (/* node = */ NULL, service_name,
1100 &ai_hints, &ai_list);
1101 if (status != 0)
1102 {
1103 ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
1104 gai_strerror (status));
1105 return (-1);
1106 }
1108 service_number = -1;
1109 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1110 {
1111 if (ai_ptr->ai_family == AF_INET)
1112 {
1113 struct sockaddr_in *sa;
1115 sa = (void *) ai_ptr->ai_addr;
1116 service_number = (int) ntohs (sa->sin_port);
1117 }
1118 else if (ai_ptr->ai_family == AF_INET6)
1119 {
1120 struct sockaddr_in6 *sa;
1122 sa = (void *) ai_ptr->ai_addr;
1123 service_number = (int) ntohs (sa->sin6_port);
1124 }
1126 if ((service_number > 0) && (service_number <= 65535))
1127 break;
1128 }
1130 freeaddrinfo (ai_list);
1132 if ((service_number > 0) && (service_number <= 65535))
1133 return (service_number);
1134 return (-1);
1135 } /* int service_name_to_port_number */