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 && (lstat (dir, &statbuf) == -1))
547 {
548 if (errno == ENOENT)
549 {
550 if (mkdir (dir, S_IRWXU | S_IRWXG | S_IRWXO) == 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 if (ksp == NULL)
639 {
640 ERROR ("get_kstat_value (\"%s\"): ksp is NULL.", name);
641 return (-1LL);
642 }
643 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
644 {
645 ERROR ("get_kstat_value (\"%s\"): ksp->ks_type (%#x) "
646 "is not KSTAT_TYPE_NAMED (%#x).",
647 name,
648 (unsigned int) ksp->ks_type,
649 (unsigned int) KSTAT_TYPE_NAMED);
650 return (-1LL);
651 }
653 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
654 return (-1LL);
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 #ifndef HAVE_HTONLL
672 unsigned long long ntohll (unsigned long long n)
673 {
674 #if BYTE_ORDER == BIG_ENDIAN
675 return (n);
676 #else
677 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
678 #endif
679 } /* unsigned long long ntohll */
681 unsigned long long htonll (unsigned long long n)
682 {
683 #if BYTE_ORDER == BIG_ENDIAN
684 return (n);
685 #else
686 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
687 #endif
688 } /* unsigned long long htonll */
689 #endif /* HAVE_HTONLL */
691 #if FP_LAYOUT_NEED_NOTHING
692 /* Well, we need nothing.. */
693 /* #endif FP_LAYOUT_NEED_NOTHING */
695 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
696 # if FP_LAYOUT_NEED_ENDIANFLIP
697 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
698 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
699 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
700 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
701 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
702 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
703 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
704 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
705 # else
706 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
707 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
708 # endif
710 double ntohd (double d)
711 {
712 union
713 {
714 uint8_t byte[8];
715 uint64_t integer;
716 double floating;
717 } ret;
719 ret.floating = d;
721 /* NAN in x86 byte order */
722 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
723 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
724 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
725 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
726 {
727 return (NAN);
728 }
729 else
730 {
731 uint64_t tmp;
733 tmp = ret.integer;
734 ret.integer = FP_CONVERT (tmp);
735 return (ret.floating);
736 }
737 } /* double ntohd */
739 double htond (double d)
740 {
741 union
742 {
743 uint8_t byte[8];
744 uint64_t integer;
745 double floating;
746 } ret;
748 if (isnan (d))
749 {
750 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
751 ret.byte[4] = ret.byte[5] = 0x00;
752 ret.byte[6] = 0xf8;
753 ret.byte[7] = 0x7f;
754 return (ret.floating);
755 }
756 else
757 {
758 uint64_t tmp;
760 ret.floating = d;
761 tmp = FP_CONVERT (ret.integer);
762 ret.integer = tmp;
763 return (ret.floating);
764 }
765 } /* double htond */
766 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
768 int format_name (char *ret, int ret_len,
769 const char *hostname,
770 const char *plugin, const char *plugin_instance,
771 const char *type, const char *type_instance)
772 {
773 int status;
775 assert (plugin != NULL);
776 assert (type != NULL);
778 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
779 {
780 if ((type_instance == NULL) || (strlen (type_instance) == 0))
781 status = ssnprintf (ret, ret_len, "%s/%s/%s",
782 hostname, plugin, type);
783 else
784 status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
785 hostname, plugin, type,
786 type_instance);
787 }
788 else
789 {
790 if ((type_instance == NULL) || (strlen (type_instance) == 0))
791 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
792 hostname, plugin, plugin_instance,
793 type);
794 else
795 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
796 hostname, plugin, plugin_instance,
797 type, type_instance);
798 }
800 if ((status < 1) || (status >= ret_len))
801 return (-1);
802 return (0);
803 } /* int format_name */
805 int parse_identifier (char *str, char **ret_host,
806 char **ret_plugin, char **ret_plugin_instance,
807 char **ret_type, char **ret_type_instance)
808 {
809 char *hostname = NULL;
810 char *plugin = NULL;
811 char *plugin_instance = NULL;
812 char *type = NULL;
813 char *type_instance = NULL;
815 hostname = str;
816 if (hostname == NULL)
817 return (-1);
819 plugin = strchr (hostname, '/');
820 if (plugin == NULL)
821 return (-1);
822 *plugin = '\0'; plugin++;
824 type = strchr (plugin, '/');
825 if (type == NULL)
826 return (-1);
827 *type = '\0'; type++;
829 plugin_instance = strchr (plugin, '-');
830 if (plugin_instance != NULL)
831 {
832 *plugin_instance = '\0';
833 plugin_instance++;
834 }
836 type_instance = strchr (type, '-');
837 if (type_instance != NULL)
838 {
839 *type_instance = '\0';
840 type_instance++;
841 }
843 *ret_host = hostname;
844 *ret_plugin = plugin;
845 *ret_plugin_instance = plugin_instance;
846 *ret_type = type;
847 *ret_type_instance = type_instance;
848 return (0);
849 } /* int parse_identifier */
851 int parse_value (const char *value_orig, value_t *ret_value, int ds_type)
852 {
853 char *value;
854 char *endptr = NULL;
855 size_t value_len;
857 if (value_orig == NULL)
858 return (EINVAL);
860 value = strdup (value_orig);
861 if (value == NULL)
862 return (ENOMEM);
863 value_len = strlen (value);
865 while ((value_len > 0) && isspace ((int) value[value_len - 1]))
866 {
867 value[value_len - 1] = 0;
868 value_len--;
869 }
871 switch (ds_type)
872 {
873 case DS_TYPE_COUNTER:
874 ret_value->counter = (counter_t) strtoull (value, &endptr, 0);
875 break;
877 case DS_TYPE_GAUGE:
878 ret_value->gauge = (gauge_t) strtod (value, &endptr);
879 break;
881 case DS_TYPE_DERIVE:
882 ret_value->derive = (derive_t) strtoll (value, &endptr, 0);
883 break;
885 case DS_TYPE_ABSOLUTE:
886 ret_value->absolute = (absolute_t) strtoull (value, &endptr, 0);
887 break;
889 default:
890 sfree (value);
891 ERROR ("parse_value: Invalid data source type: %i.", ds_type);
892 return -1;
893 }
895 if (value == endptr) {
896 sfree (value);
897 ERROR ("parse_value: Failed to parse string as %s: %s.",
898 DS_TYPE_TO_STRING (ds_type), value);
899 return -1;
900 }
901 else if ((NULL != endptr) && ('\0' != *endptr))
902 INFO ("parse_value: Ignoring trailing garbage \"%s\" after %s value. "
903 "Input string was \"%s\".",
904 endptr, DS_TYPE_TO_STRING (ds_type), value_orig);
906 sfree (value);
907 return 0;
908 } /* int parse_value */
910 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
911 {
912 int i;
913 char *dummy;
914 char *ptr;
915 char *saveptr;
917 i = -1;
918 dummy = buffer;
919 saveptr = NULL;
920 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
921 {
922 dummy = NULL;
924 if (i >= vl->values_len)
925 {
926 /* Make sure i is invalid. */
927 i = vl->values_len + 1;
928 break;
929 }
931 if (i == -1)
932 {
933 if (strcmp ("N", ptr) == 0)
934 vl->time = time (NULL);
935 else
936 vl->time = (time_t) atoi (ptr);
937 }
938 else
939 {
940 if ((strcmp ("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
941 vl->values[i].gauge = NAN;
942 else if (0 != parse_value (ptr, &vl->values[i], ds->ds[i].type))
943 return -1;
944 }
946 i++;
947 } /* while (strtok_r) */
949 if ((ptr != NULL) || (i != vl->values_len))
950 return (-1);
951 return (0);
952 } /* int parse_values */
954 #if !HAVE_GETPWNAM_R
955 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
956 size_t buflen, struct passwd **pwbufp)
957 {
958 int status = 0;
959 struct passwd *pw;
961 memset (pwbuf, '\0', sizeof (struct passwd));
963 pthread_mutex_lock (&getpwnam_r_lock);
965 do
966 {
967 pw = getpwnam (name);
968 if (pw == NULL)
969 {
970 status = (errno != 0) ? errno : ENOENT;
971 break;
972 }
974 #define GETPWNAM_COPY_MEMBER(member) \
975 if (pw->member != NULL) \
976 { \
977 int len = strlen (pw->member); \
978 if (len >= buflen) \
979 { \
980 status = ENOMEM; \
981 break; \
982 } \
983 sstrncpy (buf, pw->member, buflen); \
984 pwbuf->member = buf; \
985 buf += (len + 1); \
986 buflen -= (len + 1); \
987 }
988 GETPWNAM_COPY_MEMBER(pw_name);
989 GETPWNAM_COPY_MEMBER(pw_passwd);
990 GETPWNAM_COPY_MEMBER(pw_gecos);
991 GETPWNAM_COPY_MEMBER(pw_dir);
992 GETPWNAM_COPY_MEMBER(pw_shell);
994 pwbuf->pw_uid = pw->pw_uid;
995 pwbuf->pw_gid = pw->pw_gid;
997 if (pwbufp != NULL)
998 *pwbufp = pwbuf;
999 } while (0);
1001 pthread_mutex_unlock (&getpwnam_r_lock);
1003 return (status);
1004 } /* int getpwnam_r */
1005 #endif /* !HAVE_GETPWNAM_R */
1007 int notification_init (notification_t *n, int severity, const char *message,
1008 const char *host,
1009 const char *plugin, const char *plugin_instance,
1010 const char *type, const char *type_instance)
1011 {
1012 memset (n, '\0', sizeof (notification_t));
1014 n->severity = severity;
1016 if (message != NULL)
1017 sstrncpy (n->message, message, sizeof (n->message));
1018 if (host != NULL)
1019 sstrncpy (n->host, host, sizeof (n->host));
1020 if (plugin != NULL)
1021 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
1022 if (plugin_instance != NULL)
1023 sstrncpy (n->plugin_instance, plugin_instance,
1024 sizeof (n->plugin_instance));
1025 if (type != NULL)
1026 sstrncpy (n->type, type, sizeof (n->type));
1027 if (type_instance != NULL)
1028 sstrncpy (n->type_instance, type_instance,
1029 sizeof (n->type_instance));
1031 return (0);
1032 } /* int notification_init */
1034 int walk_directory (const char *dir, dirwalk_callback_f callback,
1035 void *user_data, int include_hidden)
1036 {
1037 struct dirent *ent;
1038 DIR *dh;
1039 int success;
1040 int failure;
1042 success = 0;
1043 failure = 0;
1045 if ((dh = opendir (dir)) == NULL)
1046 {
1047 char errbuf[1024];
1048 ERROR ("walk_directory: Cannot open '%s': %s", dir,
1049 sstrerror (errno, errbuf, sizeof (errbuf)));
1050 return -1;
1051 }
1053 while ((ent = readdir (dh)) != NULL)
1054 {
1055 int status;
1057 if (include_hidden)
1058 {
1059 if ((strcmp (".", ent->d_name) == 0)
1060 || (strcmp ("..", ent->d_name) == 0))
1061 continue;
1062 }
1063 else /* if (!include_hidden) */
1064 {
1065 if (ent->d_name[0]=='.')
1066 continue;
1067 }
1069 status = (*callback) (dir, ent->d_name, user_data);
1070 if (status != 0)
1071 failure++;
1072 else
1073 success++;
1074 }
1076 closedir (dh);
1078 if ((success == 0) && (failure > 0))
1079 return (-1);
1080 return (0);
1081 }
1083 int read_file_contents (const char *filename, char *buf, int bufsize)
1084 {
1085 FILE *fh;
1086 int n;
1088 if ((fh = fopen (filename, "r")) == NULL)
1089 return -1;
1091 n = fread(buf, 1, bufsize, fh);
1092 fclose(fh);
1094 return n;
1095 }
1097 counter_t counter_diff (counter_t old_value, counter_t new_value)
1098 {
1099 counter_t diff;
1101 if (old_value > new_value)
1102 {
1103 if (old_value <= 4294967295U)
1104 diff = (4294967295U - old_value) + new_value;
1105 else
1106 diff = (18446744073709551615ULL - old_value)
1107 + new_value;
1108 }
1109 else
1110 {
1111 diff = new_value - old_value;
1112 }
1114 return (diff);
1115 } /* counter_t counter_to_gauge */
1117 int service_name_to_port_number (const char *service_name)
1118 {
1119 struct addrinfo *ai_list;
1120 struct addrinfo *ai_ptr;
1121 struct addrinfo ai_hints;
1122 int status;
1123 int service_number;
1125 if (service_name == NULL)
1126 return (-1);
1128 ai_list = NULL;
1129 memset (&ai_hints, 0, sizeof (ai_hints));
1130 ai_hints.ai_family = AF_UNSPEC;
1132 status = getaddrinfo (/* node = */ NULL, service_name,
1133 &ai_hints, &ai_list);
1134 if (status != 0)
1135 {
1136 ERROR ("service_name_to_port_number: getaddrinfo failed: %s",
1137 gai_strerror (status));
1138 return (-1);
1139 }
1141 service_number = -1;
1142 for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next)
1143 {
1144 if (ai_ptr->ai_family == AF_INET)
1145 {
1146 struct sockaddr_in *sa;
1148 sa = (void *) ai_ptr->ai_addr;
1149 service_number = (int) ntohs (sa->sin_port);
1150 }
1151 else if (ai_ptr->ai_family == AF_INET6)
1152 {
1153 struct sockaddr_in6 *sa;
1155 sa = (void *) ai_ptr->ai_addr;
1156 service_number = (int) ntohs (sa->sin6_port);
1157 }
1159 if ((service_number > 0) && (service_number <= 65535))
1160 break;
1161 }
1163 freeaddrinfo (ai_list);
1165 if ((service_number > 0) && (service_number <= 65535))
1166 return (service_number);
1167 return (-1);
1168 } /* int service_name_to_port_number */
1170 int strtoderive (const char *string, derive_t *ret_value) /* {{{ */
1171 {
1172 derive_t tmp;
1173 char *endptr;
1175 if ((string == NULL) || (ret_value == NULL))
1176 return (EINVAL);
1178 errno = 0;
1179 endptr = NULL;
1180 tmp = (derive_t) strtoll (string, &endptr, /* base = */ 0);
1181 if ((endptr == string) || (errno != 0))
1182 return (-1);
1184 *ret_value = tmp;
1185 return (0);
1186 } /* }}} int strtoderive */