1 /**
2 * collectd - src/common.c
3 * Copyright (C) 2005-2010 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 collectd.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"
32 #include "utils_cache.h"
34 #if HAVE_PTHREAD_H
35 # include <pthread.h>
36 #endif
38 #ifdef HAVE_MATH_H
39 # include <math.h>
40 #endif
42 /* for ntohl and htonl */
43 #if HAVE_ARPA_INET_H
44 # include <arpa/inet.h>
45 #endif
47 /* for getaddrinfo */
48 #include <sys/types.h>
49 #include <sys/socket.h>
50 #include <netdb.h>
52 #if HAVE_NETINET_IN_H
53 # include <netinet/in.h>
54 #endif
56 #ifdef HAVE_LIBKSTAT
57 extern kstat_ctl_t *kc;
58 #endif
60 #if !HAVE_GETPWNAM_R
61 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
62 #endif
64 #if !HAVE_STRERROR_R
65 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
66 #endif
68 char *sstrncpy (char *dest, const char *src, size_t n)
69 {
70 strncpy (dest, src, n);
71 dest[n - 1] = '\0';
73 return (dest);
74 } /* char *sstrncpy */
76 int ssnprintf (char *dest, size_t n, const char *format, ...)
77 {
78 int ret = 0;
79 va_list ap;
81 va_start (ap, format);
82 ret = vsnprintf (dest, n, format, ap);
83 dest[n - 1] = '\0';
84 va_end (ap);
86 return (ret);
87 } /* int ssnprintf */
89 char *sstrdup (const char *s)
90 {
91 char *r;
92 size_t sz;
94 if (s == NULL)
95 return (NULL);
97 /* Do not use `strdup' here, because it's not specified in POSIX. It's
98 * ``only'' an XSI extension. */
99 sz = strlen (s) + 1;
100 r = (char *) malloc (sizeof (char) * sz);
101 if (r == NULL)
102 {
103 ERROR ("sstrdup: Out of memory.");
104 exit (3);
105 }
106 memcpy (r, s, sizeof (char) * sz);
108 return (r);
109 } /* char *sstrdup */
111 /* Even though Posix requires "strerror_r" to return an "int",
112 * some systems (e.g. the GNU libc) return a "char *" _and_
113 * ignore the second argument ... -tokkee */
114 char *sstrerror (int errnum, char *buf, size_t buflen)
115 {
116 buf[0] = '\0';
118 #if !HAVE_STRERROR_R
119 {
120 char *temp;
122 pthread_mutex_lock (&strerror_r_lock);
124 temp = strerror (errnum);
125 sstrncpy (buf, temp, buflen);
127 pthread_mutex_unlock (&strerror_r_lock);
128 }
129 /* #endif !HAVE_STRERROR_R */
131 #elif STRERROR_R_CHAR_P
132 {
133 char *temp;
134 temp = strerror_r (errnum, buf, buflen);
135 if (buf[0] == '\0')
136 {
137 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
138 sstrncpy (buf, temp, buflen);
139 else
140 sstrncpy (buf, "strerror_r did not return "
141 "an error message", buflen);
142 }
143 }
144 /* #endif STRERROR_R_CHAR_P */
146 #else
147 if (strerror_r (errnum, buf, buflen) != 0)
148 {
149 ssnprintf (buf, buflen, "Error #%i; "
150 "Additionally, strerror_r failed.",
151 errnum);
152 }
153 #endif /* STRERROR_R_CHAR_P */
155 return (buf);
156 } /* char *sstrerror */
158 void *smalloc (size_t size)
159 {
160 void *r;
162 if ((r = malloc (size)) == NULL)
163 {
164 ERROR ("Not enough memory.");
165 exit (3);
166 }
168 return (r);
169 } /* void *smalloc */
171 #if 0
172 void sfree (void **ptr)
173 {
174 if (ptr == NULL)
175 return;
177 if (*ptr != NULL)
178 free (*ptr);
180 *ptr = NULL;
181 }
182 #endif
184 ssize_t sread (int fd, void *buf, size_t count)
185 {
186 char *ptr;
187 size_t nleft;
188 ssize_t status;
190 ptr = (char *) buf;
191 nleft = count;
193 while (nleft > 0)
194 {
195 status = read (fd, (void *) ptr, nleft);
197 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
198 continue;
200 if (status < 0)
201 return (status);
203 if (status == 0)
204 {
205 DEBUG ("Received EOF from fd %i. "
206 "Closing fd and returning error.",
207 fd);
208 close (fd);
209 return (-1);
210 }
212 assert ((0 > status) || (nleft >= (size_t)status));
214 nleft = nleft - status;
215 ptr = ptr + status;
216 }
218 return (0);
219 }
222 ssize_t swrite (int fd, const void *buf, size_t count)
223 {
224 const char *ptr;
225 size_t nleft;
226 ssize_t status;
228 ptr = (const char *) buf;
229 nleft = count;
231 while (nleft > 0)
232 {
233 status = write (fd, (const void *) ptr, nleft);
235 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
236 continue;
238 if (status < 0)
239 return (status);
241 nleft = nleft - status;
242 ptr = ptr + status;
243 }
245 return (0);
246 }
248 int strsplit (char *string, char **fields, size_t size)
249 {
250 size_t i;
251 char *ptr;
252 char *saveptr;
254 i = 0;
255 ptr = string;
256 saveptr = NULL;
257 while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
258 {
259 ptr = NULL;
260 i++;
262 if (i >= size)
263 break;
264 }
266 return ((int) i);
267 }
269 int strjoin (char *dst, size_t dst_len,
270 char **fields, size_t fields_num,
271 const char *sep)
272 {
273 size_t field_len;
274 size_t sep_len;
275 int i;
277 memset (dst, '\0', dst_len);
279 if (fields_num <= 0)
280 return (-1);
282 sep_len = 0;
283 if (sep != NULL)
284 sep_len = strlen (sep);
286 for (i = 0; i < (int)fields_num; i++)
287 {
288 if ((i > 0) && (sep_len > 0))
289 {
290 if (dst_len <= sep_len)
291 return (-1);
293 strncat (dst, sep, dst_len);
294 dst_len -= sep_len;
295 }
297 field_len = strlen (fields[i]);
299 if (dst_len <= field_len)
300 return (-1);
302 strncat (dst, fields[i], dst_len);
303 dst_len -= field_len;
304 }
306 return (strlen (dst));
307 }
309 int strsubstitute (char *str, char c_from, char c_to)
310 {
311 int ret;
313 if (str == NULL)
314 return (-1);
316 ret = 0;
317 while (*str != '\0')
318 {
319 if (*str == c_from)
320 {
321 *str = c_to;
322 ret++;
323 }
324 str++;
325 }
327 return (ret);
328 } /* int strsubstitute */
330 int strunescape (char *buf, size_t buf_len)
331 {
332 size_t i;
334 for (i = 0; (i < buf_len) && (buf[i] != '\0'); ++i)
335 {
336 if (buf[i] != '\\')
337 continue;
339 if ((i >= buf_len) || (buf[i + 1] == '\0')) {
340 ERROR ("string unescape: backslash found at end of string.");
341 return (-1);
342 }
344 switch (buf[i + 1]) {
345 case 't':
346 buf[i] = '\t';
347 break;
348 case 'n':
349 buf[i] = '\n';
350 break;
351 case 'r':
352 buf[i] = '\r';
353 break;
354 default:
355 buf[i] = buf[i + 1];
356 break;
357 }
359 memmove (buf + i + 1, buf + i + 2, buf_len - i - 2);
360 }
361 return (0);
362 } /* int strunescape */
364 int escape_slashes (char *buf, int buf_len)
365 {
366 int i;
368 if (strcmp (buf, "/") == 0)
369 {
370 if (buf_len < 5)
371 return (-1);
373 strncpy (buf, "root", buf_len);
374 return (0);
375 }
377 if (buf_len <= 1)
378 return (0);
380 /* Move one to the left */
381 if (buf[0] == '/')
382 memmove (buf, buf + 1, buf_len - 1);
384 for (i = 0; i < buf_len - 1; i++)
385 {
386 if (buf[i] == '\0')
387 break;
388 else if (buf[i] == '/')
389 buf[i] = '_';
390 }
391 buf[i] = '\0';
393 return (0);
394 } /* int escape_slashes */
396 void replace_special (char *buffer, size_t buffer_size)
397 {
398 size_t i;
400 for (i = 0; i < buffer_size; i++)
401 {
402 if (buffer[i] == 0)
403 return;
404 if ((!isalnum ((int) buffer[i])) && (buffer[i] != '-'))
405 buffer[i] = '_';
406 }
407 } /* void replace_special */
409 int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
410 {
411 struct timeval *larger;
412 struct timeval *smaller;
414 int status;
416 NORMALIZE_TIMEVAL (tv0);
417 NORMALIZE_TIMEVAL (tv1);
419 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
420 {
421 if (delta != NULL) {
422 delta->tv_sec = 0;
423 delta->tv_usec = 0;
424 }
425 return (0);
426 }
428 if ((tv0.tv_sec < tv1.tv_sec)
429 || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
430 {
431 larger = &tv1;
432 smaller = &tv0;
433 status = -1;
434 }
435 else
436 {
437 larger = &tv0;
438 smaller = &tv1;
439 status = 1;
440 }
442 if (delta != NULL) {
443 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
445 if (smaller->tv_usec <= larger->tv_usec)
446 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
447 else
448 {
449 --delta->tv_sec;
450 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
451 }
452 }
454 assert ((delta == NULL)
455 || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
457 return (status);
458 } /* int timeval_cmp */
460 int check_create_dir (const char *file_orig)
461 {
462 struct stat statbuf;
464 char file_copy[512];
465 char dir[512];
466 int dir_len = 512;
467 char *fields[16];
468 int fields_num;
469 char *ptr;
470 char *saveptr;
471 int last_is_file = 1;
472 int path_is_absolute = 0;
473 size_t len;
474 int i;
476 /*
477 * Sanity checks first
478 */
479 if (file_orig == NULL)
480 return (-1);
482 if ((len = strlen (file_orig)) < 1)
483 return (-1);
484 else if (len >= sizeof (file_copy))
485 return (-1);
487 /*
488 * If `file_orig' ends in a slash the last component is a directory,
489 * otherwise it's a file. Act accordingly..
490 */
491 if (file_orig[len - 1] == '/')
492 last_is_file = 0;
493 if (file_orig[0] == '/')
494 path_is_absolute = 1;
496 /*
497 * Create a copy for `strtok_r' to destroy
498 */
499 sstrncpy (file_copy, file_orig, sizeof (file_copy));
501 /*
502 * Break into components. This will eat up several slashes in a row and
503 * remove leading and trailing slashes..
504 */
505 ptr = file_copy;
506 saveptr = NULL;
507 fields_num = 0;
508 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
509 {
510 ptr = NULL;
511 fields_num++;
513 if (fields_num >= 16)
514 break;
515 }
517 /*
518 * For each component, do..
519 */
520 for (i = 0; i < (fields_num - last_is_file); i++)
521 {
522 /*
523 * Do not create directories that start with a dot. This
524 * prevents `../../' attacks and other likely malicious
525 * behavior.
526 */
527 if (fields[i][0] == '.')
528 {
529 ERROR ("Cowardly refusing to create a directory that "
530 "begins with a `.' (dot): `%s'", file_orig);
531 return (-2);
532 }
534 /*
535 * Join the components together again
536 */
537 dir[0] = '/';
538 if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute,
539 fields, i + 1, "/") < 0)
540 {
541 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
542 return (-1);
543 }
545 while (42) {
546 if (stat (dir, &statbuf) == -1)
547 {
548 if (errno == ENOENT)
549 {
550 if (mkdir (dir, 0755) == 0)
551 break;
553 /* this might happen, if a different thread created
554 * the directory in the meantime
555 * => call stat() again to check for S_ISDIR() */
556 if (EEXIST == errno)
557 continue;
559 char errbuf[1024];
560 ERROR ("check_create_dir: mkdir (%s): %s", dir,
561 sstrerror (errno,
562 errbuf, sizeof (errbuf)));
563 return (-1);
564 }
565 else
566 {
567 char errbuf[1024];
568 ERROR ("check_create_dir: stat (%s): %s", dir,
569 sstrerror (errno, errbuf,
570 sizeof (errbuf)));
571 return (-1);
572 }
573 }
574 else if (!S_ISDIR (statbuf.st_mode))
575 {
576 ERROR ("check_create_dir: `%s' exists but is not "
577 "a directory!", dir);
578 return (-1);
579 }
580 break;
581 }
582 }
584 return (0);
585 } /* check_create_dir */
587 #ifdef HAVE_LIBKSTAT
588 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
589 {
590 char ident[128];
592 *ksp_ptr = NULL;
594 if (kc == NULL)
595 return (-1);
597 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
599 *ksp_ptr = kstat_lookup (kc, module, instance, name);
600 if (*ksp_ptr == NULL)
601 {
602 ERROR ("get_kstat: Cound not find kstat %s", ident);
603 return (-1);
604 }
606 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
607 {
608 ERROR ("get_kstat: kstat %s has wrong type", ident);
609 *ksp_ptr = NULL;
610 return (-1);
611 }
613 #ifdef assert
614 assert (*ksp_ptr != NULL);
615 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
616 #endif
618 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
619 {
620 ERROR ("get_kstat: kstat %s could not be read", ident);
621 return (-1);
622 }
624 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
625 {
626 ERROR ("get_kstat: kstat %s has wrong type", ident);
627 return (-1);
628 }
630 return (0);
631 }
633 long long get_kstat_value (kstat_t *ksp, char *name)
634 {
635 kstat_named_t *kn;
636 long long retval = -1LL;
638 #ifdef assert
639 assert (ksp != NULL);
640 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
641 #else
642 if (ksp == NULL)
643 {
644 ERROR ("ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
645 return (-1LL);
646 }
647 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
648 {
649 ERROR ("ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
650 return (-1LL);
651 }
652 #endif
654 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
655 return (retval);
657 if (kn->data_type == KSTAT_DATA_INT32)
658 retval = (long long) kn->value.i32;
659 else if (kn->data_type == KSTAT_DATA_UINT32)
660 retval = (long long) kn->value.ui32;
661 else if (kn->data_type == KSTAT_DATA_INT64)
662 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
663 else if (kn->data_type == KSTAT_DATA_UINT64)
664 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
665 else
666 WARNING ("get_kstat_value: Not a numeric value: %s", name);
668 return (retval);
669 }
670 #endif /* HAVE_LIBKSTAT */
672 #ifndef HAVE_HTONLL
673 unsigned long long ntohll (unsigned long long n)
674 {
675 #if BYTE_ORDER == BIG_ENDIAN
676 return (n);
677 #else
678 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
679 #endif
680 } /* unsigned long long ntohll */
682 unsigned long long htonll (unsigned long long n)
683 {
684 #if BYTE_ORDER == BIG_ENDIAN
685 return (n);
686 #else
687 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
688 #endif
689 } /* unsigned long long htonll */
690 #endif /* HAVE_HTONLL */
692 #if FP_LAYOUT_NEED_NOTHING
693 /* Well, we need nothing.. */
694 /* #endif FP_LAYOUT_NEED_NOTHING */
696 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
697 # if FP_LAYOUT_NEED_ENDIANFLIP
698 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
699 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
700 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
701 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
702 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
703 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
704 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
705 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
706 # else
707 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
708 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
709 # endif
711 double ntohd (double d)
712 {
713 union
714 {
715 uint8_t byte[8];
716 uint64_t integer;
717 double floating;
718 } ret;
720 ret.floating = d;
722 /* NAN in x86 byte order */
723 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
724 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
725 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
726 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
727 {
728 return (NAN);
729 }
730 else
731 {
732 uint64_t tmp;
734 tmp = ret.integer;
735 ret.integer = FP_CONVERT (tmp);
736 return (ret.floating);
737 }
738 } /* double ntohd */
740 double htond (double d)
741 {
742 union
743 {
744 uint8_t byte[8];
745 uint64_t integer;
746 double floating;
747 } ret;
749 if (isnan (d))
750 {
751 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
752 ret.byte[4] = ret.byte[5] = 0x00;
753 ret.byte[6] = 0xf8;
754 ret.byte[7] = 0x7f;
755 return (ret.floating);
756 }
757 else
758 {
759 uint64_t tmp;
761 ret.floating = d;
762 tmp = FP_CONVERT (ret.integer);
763 ret.integer = tmp;
764 return (ret.floating);
765 }
766 } /* double htond */
767 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
769 int format_name (char *ret, int ret_len,
770 const char *hostname,
771 const char *plugin, const char *plugin_instance,
772 const char *type, const char *type_instance)
773 {
774 int status;
776 assert (plugin != NULL);
777 assert (type != NULL);
779 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
780 {
781 if ((type_instance == NULL) || (strlen (type_instance) == 0))
782 status = ssnprintf (ret, ret_len, "%s/%s/%s",
783 hostname, plugin, type);
784 else
785 status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
786 hostname, plugin, type,
787 type_instance);
788 }
789 else
790 {
791 if ((type_instance == NULL) || (strlen (type_instance) == 0))
792 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
793 hostname, plugin, plugin_instance,
794 type);
795 else
796 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
797 hostname, plugin, plugin_instance,
798 type, type_instance);
799 }
801 if ((status < 1) || (status >= ret_len))
802 return (-1);
803 return (0);
804 } /* int format_name */
806 int format_values (char *ret, size_t ret_len, /* {{{ */
807 const data_set_t *ds, const value_list_t *vl,
808 _Bool store_rates)
809 {
810 size_t offset = 0;
811 int status;
812 int i;
813 gauge_t *rates = NULL;
815 assert (0 == strcmp (ds->type, vl->type));
817 memset (ret, 0, ret_len);
819 #define BUFFER_ADD(...) do { \
820 status = ssnprintf (ret + offset, ret_len - offset, \
821 __VA_ARGS__); \
822 if (status < 1) \
823 { \
824 sfree (rates); \
825 return (-1); \
826 } \
827 else if (((size_t) status) >= (ret_len - offset)) \
828 { \
829 sfree (rates); \
830 return (-1); \
831 } \
832 else \
833 offset += ((size_t) status); \
834 } while (0)
836 BUFFER_ADD ("%.3f", CDTIME_T_TO_DOUBLE (vl->time));
838 for (i = 0; i < ds->ds_num; i++)
839 {
840 if (ds->ds[i].type == DS_TYPE_GAUGE)
841 BUFFER_ADD (":%f", vl->values[i].gauge);
842 else if (store_rates)
843 {
844 if (rates == NULL)
845 rates = uc_get_rate (ds, vl);
846 if (rates == NULL)
847 {
848 WARNING ("format_values: "
849 "uc_get_rate failed.");
850 return (-1);
851 }
852 BUFFER_ADD (":%g", rates[i]);
853 }
854 else if (ds->ds[i].type == DS_TYPE_COUNTER)
855 BUFFER_ADD (":%llu", vl->values[i].counter);
856 else if (ds->ds[i].type == DS_TYPE_DERIVE)
857 BUFFER_ADD (":%"PRIi64, vl->values[i].derive);
858 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
859 BUFFER_ADD (":%"PRIu64, vl->values[i].absolute);
860 else
861 {
862 ERROR ("format_values plugin: Unknown data source type: %i",
863 ds->ds[i].type);
864 sfree (rates);
865 return (-1);
866 }
867 } /* for ds->ds_num */
869 #undef BUFFER_ADD
871 sfree (rates);
872 return (0);
873 } /* }}} int format_values */
875 int parse_identifier (char *str, char **ret_host,
876 char **ret_plugin, char **ret_plugin_instance,
877 char **ret_type, char **ret_type_instance)
878 {
879 char *hostname = NULL;
880 char *plugin = NULL;
881 char *plugin_instance = NULL;
882 char *type = NULL;
883 char *type_instance = NULL;
885 hostname = str;
886 if (hostname == NULL)
887 return (-1);
889 plugin = strchr (hostname, '/');
890 if (plugin == NULL)
891 return (-1);
892 *plugin = '\0'; plugin++;
894 type = strchr (plugin, '/');
895 if (type == NULL)
896 return (-1);
897 *type = '\0'; type++;
899 plugin_instance = strchr (plugin, '-');
900 if (plugin_instance != NULL)
901 {
902 *plugin_instance = '\0';
903 plugin_instance++;
904 }
906 type_instance = strchr (type, '-');
907 if (type_instance != NULL)
908 {
909 *type_instance = '\0';
910 type_instance++;
911 }
913 *ret_host = hostname;
914 *ret_plugin = plugin;
915 *ret_plugin_instance = plugin_instance;
916 *ret_type = type;
917 *ret_type_instance = type_instance;
918 return (0);
919 } /* int parse_identifier */
921 int parse_identifier_vl (const char *str, value_list_t *vl) /* {{{ */
922 {
923 char str_copy[6 * DATA_MAX_NAME_LEN];
924 char *host = NULL;
925 char *plugin = NULL;
926 char *plugin_instance = NULL;
927 char *type = NULL;
928 char *type_instance = NULL;
929 int status;
931 if ((str == NULL) || (vl == NULL))
932 return (EINVAL);
934 sstrncpy (str_copy, str, sizeof (str_copy));
936 status = parse_identifier (str_copy, &host,
937 &plugin, &plugin_instance,
938 &type, &type_instance);
939 if (status != 0)
940 return (status);
942 sstrncpy (vl->host, host, sizeof (host));
943 sstrncpy (vl->plugin, plugin, sizeof (plugin));
944 sstrncpy (vl->plugin_instance,
945 (plugin_instance != NULL) ? plugin_instance : "",
946 sizeof (plugin_instance));
947 sstrncpy (vl->type, type, sizeof (type));
948 sstrncpy (vl->type_instance,
949 (type_instance != NULL) ? type_instance : "",
950 sizeof (type_instance));
952 return (0);
953 } /* }}} int parse_identifier_vl */
955 int parse_value (const char *value, value_t *ret_value, int ds_type)
956 {
957 char *endptr = NULL;
959 switch (ds_type)
960 {
961 case DS_TYPE_COUNTER:
962 ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
963 break;
965 case DS_TYPE_GAUGE:
966 ret_value->gauge = (gauge_t) strtod (value, &endptr);
967 break;
969 case DS_TYPE_DERIVE:
970 ret_value->derive = (derive_t) strtoll (value, &endptr, 0);
971 break;
973 case DS_TYPE_ABSOLUTE:
974 ret_value->absolute = (absolute_t) strtoull (value, &endptr, 0);
975 break;
977 default:
978 ERROR ("parse_value: Invalid data source type: %i.", ds_type);
979 return -1;
980 }
982 if (value == endptr) {
983 ERROR ("parse_value: Failed to parse string as number: %s.", value);
984 return -1;
985 }
986 else if ((NULL != endptr) && ('\0' != *endptr))
987 WARNING ("parse_value: Ignoring trailing garbage after number: %s.",
988 endptr);
989 return 0;
990 } /* int parse_value */
992 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
993 {
994 int i;
995 char *dummy;
996 char *ptr;
997 char *saveptr;
999 i = -1;
1000 dummy = buffer;
1001 saveptr = NULL;
1002 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
1003 {
1004 dummy = NULL;
1006 if (i >= vl->values_len)
1007 {
1008 /* Make sure i is invalid. */
1009 i = vl->values_len + 1;
1010 break;
1011 }
1013 if (i == -1)
1014 {
1015 if (strcmp ("N", ptr) == 0)
1016 vl->time = cdtime ();
1017 else
1018 {
1019 char *endptr = NULL;
1020 double tmp;
1022 errno = 0;
1023 tmp = strtod (ptr, &endptr);
1024 if ((errno != 0) /* Overflow */
1025 || (endptr == ptr) /* Invalid string */
1026 || (endptr == NULL) /* This should not happen */
1027 || (*endptr != 0)) /* Trailing chars */
1028 return (-1);
1030 vl->time = DOUBLE_TO_CDTIME_T (tmp);
1031 }
1032 }
1033 else
1034 {
1035 if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
1036 vl->values[i].gauge = NAN;
1037 else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
1038 return -1;
1039 }
1041 i++;
1042 } /* while (strtok_r) */
1044 if ((ptr != NULL) || (i != vl->values_len))
1045 return (-1);
1046 return (0);
1047 } /* int parse_values */
1049 #if !HAVE_GETPWNAM_R
1050 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
1051 size_t buflen, struct passwd **pwbufp)
1052 {
1053 int status = 0;
1054 struct passwd *pw;
1056 memset (pwbuf, '\0', sizeof (struct passwd));
1058 pthread_mutex_lock (&getpwnam_r_lock);
1060 do
1061 {
1062 pw = getpwnam (name);
1063 if (pw == NULL)
1064 {
1065 status = (errno != 0) ? errno : ENOENT;
1066 break;
1067 }
1069 #define GETPWNAM_COPY_MEMBER(member) \
1070 if (pw->member != NULL) \
1071 { \
1072 int len = strlen (pw->member); \
1073 if (len >= buflen) \
1074 { \
1075 status = ENOMEM; \
1076 break; \
1077 } \
1078 sstrncpy (buf, pw->member, buflen); \
1079 pwbuf->member = buf; \
1080 buf += (len + 1); \
1081 buflen -= (len + 1); \
1082 }
1083 GETPWNAM_COPY_MEMBER(pw_name);
1084 GETPWNAM_COPY_MEMBER(pw_passwd);
1085 GETPWNAM_COPY_MEMBER(pw_gecos);
1086 GETPWNAM_COPY_MEMBER(pw_dir);
1087 GETPWNAM_COPY_MEMBER(pw_shell);
1089 pwbuf->pw_uid = pw->pw_uid;
1090 pwbuf->pw_gid = pw->pw_gid;
1092 if (pwbufp != NULL)
1093 *pwbufp = pwbuf;
1094 } while (0);
1096 pthread_mutex_unlock (&getpwnam_r_lock);
1098 return (status);
1099 } /* int getpwnam_r */
1100 #endif /* !HAVE_GETPWNAM_R */
1102 int notification_init (notification_t *n, int severity, const char *message,
1103 const char *host,
1104 const char *plugin, const char *plugin_instance,
1105 const char *type, const char *type_instance)
1106 {
1107 memset (n, '\0', sizeof (notification_t));
1109 n->severity = severity;
1111 if (message != NULL)
1112 sstrncpy (n->message, message, sizeof (n->message));
1113 if (host != NULL)
1114 sstrncpy (n->host, host, sizeof (n->host));
1115 if (plugin != NULL)
1116 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
1117 if (plugin_instance != NULL)
1118 sstrncpy (n->plugin_instance, plugin_instance,
1119 sizeof (n->plugin_instance));
1120 if (type != NULL)
1121 sstrncpy (n->type, type, sizeof (n->type));
1122 if (type_instance != NULL)
1123 sstrncpy (n->type_instance, type_instance,
1124 sizeof (n->type_instance));
1126 return (0);
1127 } /* int notification_init */
1129 int walk_directory (const char *dir, dirwalk_callback_f callback,
1130 void *user_data, int include_hidden)
1131 {
1132 struct dirent *ent;
1133 DIR *dh;
1134 int success;
1135 int failure;
1137 success = 0;
1138 failure = 0;
1140 if ((dh = opendir (dir)) == NULL)
1141 {
1142 char errbuf[1024];
1143 ERROR ("walk_directory: Cannot open '%s': %s", dir,
1144 sstrerror (errno, errbuf, sizeof (errbuf)));
1145 return -1;
1146 }
1148 while ((ent = readdir (dh)) != NULL)
1149 {
1150 int status;
1152 if (include_hidden)
1153 {
1154 if ((strcmp (".", ent->d_name) == 0)
1155 || (strcmp ("..", ent->d_name) == 0))
1156 continue;
1157 }
1158 else /* if (!include_hidden) */
1159 {
1160 if (ent->d_name[0]=='.')
1161 continue;
1162 }
1164 status = (*callback) (dir, ent->d_name, user_data);
1165 if (status != 0)
1166 failure++;
1167 else
1168 success++;
1169 }
1171 closedir (dh);
1173 if ((success == 0) && (failure > 0))
1174 return (-1);
1175 return (0);
1176 }
1178 int read_file_contents (const char *filename, char *buf, int bufsize)
1179 {
1180 FILE *fh;
1181 int n;
1183 if ((fh = fopen (filename, "r")) == NULL)
1184 return -1;
1186 n = fread(buf, 1, bufsize, fh);
1187 fclose(fh);
1189 return n;
1190 }
1192 counter_t counter_diff (counter_t old_value, counter_t new_value)
1193 {
1194 counter_t diff;
1196 if (old_value > new_value)
1197 {
1198 if (old_value <= 4294967295U)
1199 diff = (4294967295U - old_value) + new_value;
1200 else
1201 diff = (18446744073709551615ULL - old_value)
1202 + new_value;
1203 }
1204 else
1205 {
1206 diff = new_value - old_value;
1207 }
1209 return (diff);
1210 } /* counter_t counter_to_gauge */
1212 int service_name_to_port_number (const char *service_name)
1213 {
1214 struct addrinfo *ai_list;
1215 struct addrinfo *ai_ptr;
1216 struct addrinfo ai_hints;
1217 int status;
1218 int service_number;
1220 if (service_name == NULL)
1221 return (-1);
1223 ai_list = NULL;
1224 memset (&ai_hints, 0, sizeof (ai_hints));
1225 ai_hints.ai_family = AF_UNSPEC;
1227 status = getaddrinfo (/* node = */ NULL, service_name,
1228 &ai_hints, &ai_list);
1229 if (status != 0)
1230 {
1231 ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
1232 gai_strerror (status));
1233 return (-1);
1234 }
1236 service_number = -1;
1237 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1238 {
1239 if (ai_ptr->ai_family == AF_INET)
1240 {
1241 struct sockaddr_in *sa;
1243 sa = (void *) ai_ptr->ai_addr;
1244 service_number = (int) ntohs (sa->sin_port);
1245 }
1246 else if (ai_ptr->ai_family == AF_INET6)
1247 {
1248 struct sockaddr_in6 *sa;
1250 sa = (void *) ai_ptr->ai_addr;
1251 service_number = (int) ntohs (sa->sin6_port);
1252 }
1254 if ((service_number > 0) && (service_number <= 65535))
1255 break;
1256 }
1258 freeaddrinfo (ai_list);
1260 if ((service_number > 0) && (service_number <= 65535))
1261 return (service_number);
1262 return (-1);
1263 } /* int service_name_to_port_number */
1265 int strtoderive (const char *string, derive_t *ret_value) /* {{{ */
1266 {
1267 derive_t tmp;
1268 char *endptr;
1270 if ((string == NULL) || (ret_value == NULL))
1271 return (EINVAL);
1273 errno = 0;
1274 endptr = NULL;
1275 tmp = (derive_t) strtoll (string, &endptr, /* base = */ 0);
1276 if ((endptr == string) || (errno != 0))
1277 return (-1);
1279 *ret_value = tmp;
1280 return (0);
1281 } /* }}} int strtoderive */