1 /**
2 * collectd - src/common.c
3 * Copyright (C) 2005-2008 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 #ifdef HAVE_LIBKSTAT
47 extern kstat_ctl_t *kc;
48 #endif
50 #if !HAVE_GETPWNAM_R
51 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
52 #endif
54 #if !HAVE_STRERROR_R
55 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
56 #endif
58 char *sstrncpy (char *dest, const char *src, size_t n)
59 {
60 strncpy (dest, src, n);
61 dest[n - 1] = '\0';
63 return (dest);
64 } /* char *sstrncpy */
66 int ssnprintf (char *dest, size_t n, const char *format, ...)
67 {
68 int ret = 0;
69 va_list ap;
71 va_start (ap, format);
72 ret = vsnprintf (dest, n, format, ap);
73 dest[n - 1] = '\0';
74 va_end (ap);
76 return (ret);
77 } /* int ssnprintf */
79 char *sstrdup (const char *s)
80 {
81 char *r;
82 size_t sz;
84 if (s == NULL)
85 return (NULL);
87 /* Do not use `strdup' here, because it's not specified in POSIX. It's
88 * ``only'' an XSI extension. */
89 sz = strlen (s) + 1;
90 r = (char *) malloc (sizeof (char) * sz);
91 if (r == NULL)
92 {
93 ERROR ("sstrdup: Out of memory.");
94 exit (3);
95 }
96 memcpy (r, s, sizeof (char) * sz);
98 return (r);
99 } /* char *sstrdup */
101 /* Even though Posix requires "strerror_r" to return an "int",
102 * some systems (e.g. the GNU libc) return a "char *" _and_
103 * ignore the second argument ... -tokkee */
104 char *sstrerror (int errnum, char *buf, size_t buflen)
105 {
106 buf[0] = '\0';
108 #if !HAVE_STRERROR_R
109 {
110 char *temp;
112 pthread_mutex_lock (&strerror_r_lock);
114 temp = strerror (errnum);
115 sstrncpy (buf, temp, buflen);
117 pthread_mutex_unlock (&strerror_r_lock);
118 }
119 /* #endif !HAVE_STRERROR_R */
121 #elif STRERROR_R_CHAR_P
122 {
123 char *temp;
124 temp = strerror_r (errnum, buf, buflen);
125 if (buf[0] == '\0')
126 {
127 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
128 sstrncpy (buf, temp, buflen);
129 else
130 sstrncpy (buf, "strerror_r did not return "
131 "an error message", buflen);
132 }
133 }
134 /* #endif STRERROR_R_CHAR_P */
136 #else
137 if (strerror_r (errnum, buf, buflen) != 0)
138 {
139 ssnprintf (buf, buflen, "Error #%i; "
140 "Additionally, strerror_r failed.",
141 errnum);
142 }
143 #endif /* STRERROR_R_CHAR_P */
145 return (buf);
146 } /* char *sstrerror */
148 void *smalloc (size_t size)
149 {
150 void *r;
152 if ((r = malloc (size)) == NULL)
153 {
154 ERROR ("Not enough memory.");
155 exit (3);
156 }
158 return (r);
159 } /* void *smalloc */
161 #if 0
162 void sfree (void **ptr)
163 {
164 if (ptr == NULL)
165 return;
167 if (*ptr != NULL)
168 free (*ptr);
170 *ptr = NULL;
171 }
172 #endif
174 ssize_t sread (int fd, void *buf, size_t count)
175 {
176 char *ptr;
177 size_t nleft;
178 ssize_t status;
180 ptr = (char *) buf;
181 nleft = count;
183 while (nleft > 0)
184 {
185 status = read (fd, (void *) ptr, nleft);
187 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
188 continue;
190 if (status < 0)
191 return (status);
193 if (status == 0)
194 {
195 DEBUG ("Received EOF from fd %i. "
196 "Closing fd and returning error.",
197 fd);
198 close (fd);
199 return (-1);
200 }
202 assert ((0 > status) || (nleft >= (size_t)status));
204 nleft = nleft - status;
205 ptr = ptr + status;
206 }
208 return (0);
209 }
212 ssize_t swrite (int fd, const void *buf, size_t count)
213 {
214 const char *ptr;
215 size_t nleft;
216 ssize_t status;
218 ptr = (const char *) buf;
219 nleft = count;
221 while (nleft > 0)
222 {
223 status = write (fd, (const void *) ptr, nleft);
225 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
226 continue;
228 if (status < 0)
229 return (status);
231 nleft = nleft - status;
232 ptr = ptr + status;
233 }
235 return (0);
236 }
238 int strsplit (char *string, char **fields, size_t size)
239 {
240 size_t i;
241 char *ptr;
242 char *saveptr;
244 i = 0;
245 ptr = string;
246 saveptr = NULL;
247 while ((fields[i] = strtok_r (ptr, " \t\r\n", &saveptr)) != NULL)
248 {
249 ptr = NULL;
250 i++;
252 if (i >= size)
253 break;
254 }
256 return (i);
257 }
259 int strjoin (char *dst, size_t dst_len,
260 char **fields, size_t fields_num,
261 const char *sep)
262 {
263 size_t field_len;
264 size_t sep_len;
265 int i;
267 memset (dst, '\0', dst_len);
269 if (fields_num <= 0)
270 return (-1);
272 sep_len = 0;
273 if (sep != NULL)
274 sep_len = strlen (sep);
276 for (i = 0; i < (int)fields_num; i++)
277 {
278 if ((i > 0) && (sep_len > 0))
279 {
280 if (dst_len <= sep_len)
281 return (-1);
283 strncat (dst, sep, dst_len);
284 dst_len -= sep_len;
285 }
287 field_len = strlen (fields[i]);
289 if (dst_len <= field_len)
290 return (-1);
292 strncat (dst, fields[i], dst_len);
293 dst_len -= field_len;
294 }
296 return (strlen (dst));
297 }
299 int strsubstitute (char *str, char c_from, char c_to)
300 {
301 int ret;
303 if (str == NULL)
304 return (-1);
306 ret = 0;
307 while (*str != '\0')
308 {
309 if (*str == c_from)
310 {
311 *str = c_to;
312 ret++;
313 }
314 str++;
315 }
317 return (ret);
318 } /* int strsubstitute */
320 int escape_slashes (char *buf, int buf_len)
321 {
322 int i;
324 if (strcmp (buf, "/") == 0)
325 {
326 if (buf_len < 5)
327 return (-1);
329 strncpy (buf, "root", buf_len);
330 return (0);
331 }
333 if (buf_len <= 1)
334 return (0);
336 /* Move one to the left */
337 if (buf[0] == '/')
338 memmove (buf, buf + 1, buf_len - 1);
340 for (i = 0; i < buf_len - 1; i++)
341 {
342 if (buf[i] == '\0')
343 break;
344 else if (buf[i] == '/')
345 buf[i] = '_';
346 }
347 buf[i] = '\0';
349 return (0);
350 } /* int escape_slashes */
352 int timeval_cmp (struct timeval tv0, struct timeval tv1, struct timeval *delta)
353 {
354 struct timeval *larger;
355 struct timeval *smaller;
357 int status;
359 NORMALIZE_TIMEVAL (tv0);
360 NORMALIZE_TIMEVAL (tv1);
362 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec))
363 {
364 if (delta != NULL) {
365 delta->tv_sec = 0;
366 delta->tv_usec = 0;
367 }
368 return (0);
369 }
371 if ((tv0.tv_sec < tv1.tv_sec)
372 || ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec)))
373 {
374 larger = &tv1;
375 smaller = &tv0;
376 status = -1;
377 }
378 else
379 {
380 larger = &tv0;
381 smaller = &tv1;
382 status = 1;
383 }
385 if (delta != NULL) {
386 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
388 if (smaller->tv_usec <= larger->tv_usec)
389 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
390 else
391 {
392 --delta->tv_sec;
393 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
394 }
395 }
397 assert ((delta == NULL)
398 || ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
400 return (status);
401 } /* int timeval_cmp */
403 int check_create_dir (const char *file_orig)
404 {
405 struct stat statbuf;
407 char file_copy[512];
408 char dir[512];
409 int dir_len = 512;
410 char *fields[16];
411 int fields_num;
412 char *ptr;
413 char *saveptr;
414 int last_is_file = 1;
415 int path_is_absolute = 0;
416 size_t len;
417 int i;
419 /*
420 * Sanity checks first
421 */
422 if (file_orig == NULL)
423 return (-1);
425 if ((len = strlen (file_orig)) < 1)
426 return (-1);
427 else if (len >= sizeof (file_copy))
428 return (-1);
430 /*
431 * If `file_orig' ends in a slash the last component is a directory,
432 * otherwise it's a file. Act accordingly..
433 */
434 if (file_orig[len - 1] == '/')
435 last_is_file = 0;
436 if (file_orig[0] == '/')
437 path_is_absolute = 1;
439 /*
440 * Create a copy for `strtok_r' to destroy
441 */
442 sstrncpy (file_copy, file_orig, sizeof (file_copy));
444 /*
445 * Break into components. This will eat up several slashes in a row and
446 * remove leading and trailing slashes..
447 */
448 ptr = file_copy;
449 saveptr = NULL;
450 fields_num = 0;
451 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
452 {
453 ptr = NULL;
454 fields_num++;
456 if (fields_num >= 16)
457 break;
458 }
460 /*
461 * For each component, do..
462 */
463 for (i = 0; i < (fields_num - last_is_file); i++)
464 {
465 /*
466 * Do not create directories that start with a dot. This
467 * prevents `../../' attacks and other likely malicious
468 * behavior.
469 */
470 if (fields[i][0] == '.')
471 {
472 ERROR ("Cowardly refusing to create a directory that "
473 "begins with a `.' (dot): `%s'", file_orig);
474 return (-2);
475 }
477 /*
478 * Join the components together again
479 */
480 dir[0] = '/';
481 if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute,
482 fields, i + 1, "/") < 0)
483 {
484 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
485 return (-1);
486 }
488 while (42) {
489 if (stat (dir, &statbuf) == -1)
490 {
491 if (errno == ENOENT)
492 {
493 if (mkdir (dir, 0755) == 0)
494 break;
496 /* this might happen, if a different thread created
497 * the directory in the meantime
498 * => call stat() again to check for S_ISDIR() */
499 if (EEXIST == errno)
500 continue;
502 char errbuf[1024];
503 ERROR ("check_create_dir: mkdir (%s): %s", dir,
504 sstrerror (errno,
505 errbuf, sizeof (errbuf)));
506 return (-1);
507 }
508 else
509 {
510 char errbuf[1024];
511 ERROR ("check_create_dir: stat (%s): %s", dir,
512 sstrerror (errno, errbuf,
513 sizeof (errbuf)));
514 return (-1);
515 }
516 }
517 else if (!S_ISDIR (statbuf.st_mode))
518 {
519 ERROR ("check_create_dir: `%s' exists but is not "
520 "a directory!", dir);
521 return (-1);
522 }
523 break;
524 }
525 }
527 return (0);
528 } /* check_create_dir */
530 #ifdef HAVE_LIBKSTAT
531 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
532 {
533 char ident[128];
535 *ksp_ptr = NULL;
537 if (kc == NULL)
538 return (-1);
540 ssnprintf (ident, sizeof (ident), "%s,%i,%s", module, instance, name);
542 *ksp_ptr = kstat_lookup (kc, module, instance, name);
543 if (*ksp_ptr == NULL)
544 {
545 ERROR ("get_kstat: Cound not find kstat %s", ident);
546 return (-1);
547 }
549 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
550 {
551 ERROR ("get_kstat: kstat %s has wrong type", ident);
552 *ksp_ptr = NULL;
553 return (-1);
554 }
556 #ifdef assert
557 assert (*ksp_ptr != NULL);
558 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
559 #endif
561 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
562 {
563 ERROR ("get_kstat: kstat %s could not be read", ident);
564 return (-1);
565 }
567 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
568 {
569 ERROR ("get_kstat: kstat %s has wrong type", ident);
570 return (-1);
571 }
573 return (0);
574 }
576 long long get_kstat_value (kstat_t *ksp, char *name)
577 {
578 kstat_named_t *kn;
579 long long retval = -1LL;
581 #ifdef assert
582 assert (ksp != NULL);
583 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
584 #else
585 if (ksp == NULL)
586 {
587 ERROR ("ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
588 return (-1LL);
589 }
590 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
591 {
592 ERROR ("ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
593 return (-1LL);
594 }
595 #endif
597 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
598 return (retval);
600 if (kn->data_type == KSTAT_DATA_INT32)
601 retval = (long long) kn->value.i32;
602 else if (kn->data_type == KSTAT_DATA_UINT32)
603 retval = (long long) kn->value.ui32;
604 else if (kn->data_type == KSTAT_DATA_INT64)
605 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
606 else if (kn->data_type == KSTAT_DATA_UINT64)
607 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
608 else
609 WARNING ("get_kstat_value: Not a numeric value: %s", name);
611 return (retval);
612 }
613 #endif /* HAVE_LIBKSTAT */
615 unsigned long long ntohll (unsigned long long n)
616 {
617 #if BYTE_ORDER == BIG_ENDIAN
618 return (n);
619 #else
620 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
621 #endif
622 } /* unsigned long long ntohll */
624 unsigned long long htonll (unsigned long long n)
625 {
626 #if BYTE_ORDER == BIG_ENDIAN
627 return (n);
628 #else
629 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
630 #endif
631 } /* unsigned long long htonll */
633 #if FP_LAYOUT_NEED_NOTHING
634 /* Well, we need nothing.. */
635 /* #endif FP_LAYOUT_NEED_NOTHING */
637 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
638 # if FP_LAYOUT_NEED_ENDIANFLIP
639 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xff00000000000000LL) >> 56) | \
640 (((uint64_t)(A) & 0x00ff000000000000LL) >> 40) | \
641 (((uint64_t)(A) & 0x0000ff0000000000LL) >> 24) | \
642 (((uint64_t)(A) & 0x000000ff00000000LL) >> 8) | \
643 (((uint64_t)(A) & 0x00000000ff000000LL) << 8) | \
644 (((uint64_t)(A) & 0x0000000000ff0000LL) << 24) | \
645 (((uint64_t)(A) & 0x000000000000ff00LL) << 40) | \
646 (((uint64_t)(A) & 0x00000000000000ffLL) << 56))
647 # else
648 # define FP_CONVERT(A) ((((uint64_t)(A) & 0xffffffff00000000LL) >> 32) | \
649 (((uint64_t)(A) & 0x00000000ffffffffLL) << 32))
650 # endif
652 double ntohd (double d)
653 {
654 union
655 {
656 uint8_t byte[8];
657 uint64_t integer;
658 double floating;
659 } ret;
661 ret.floating = d;
663 /* NAN in x86 byte order */
664 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00)
665 && (ret.byte[2] == 0x00) && (ret.byte[3] == 0x00)
666 && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00)
667 && (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f))
668 {
669 return (NAN);
670 }
671 else
672 {
673 uint64_t tmp;
675 tmp = ret.integer;
676 ret.integer = FP_CONVERT (tmp);
677 return (ret.floating);
678 }
679 } /* double ntohd */
681 double htond (double d)
682 {
683 union
684 {
685 uint8_t byte[8];
686 uint64_t integer;
687 double floating;
688 } ret;
690 if (isnan (d))
691 {
692 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
693 ret.byte[4] = ret.byte[5] = 0x00;
694 ret.byte[6] = 0xf8;
695 ret.byte[7] = 0x7f;
696 return (ret.floating);
697 }
698 else
699 {
700 uint64_t tmp;
702 ret.floating = d;
703 tmp = FP_CONVERT (ret.integer);
704 ret.integer = tmp;
705 return (ret.floating);
706 }
707 } /* double htond */
708 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
710 int format_name (char *ret, int ret_len,
711 const char *hostname,
712 const char *plugin, const char *plugin_instance,
713 const char *type, const char *type_instance)
714 {
715 int status;
717 assert (plugin != NULL);
718 assert (type != NULL);
720 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
721 {
722 if ((type_instance == NULL) || (strlen (type_instance) == 0))
723 status = ssnprintf (ret, ret_len, "%s/%s/%s",
724 hostname, plugin, type);
725 else
726 status = ssnprintf (ret, ret_len, "%s/%s/%s-%s",
727 hostname, plugin, type,
728 type_instance);
729 }
730 else
731 {
732 if ((type_instance == NULL) || (strlen (type_instance) == 0))
733 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s",
734 hostname, plugin, plugin_instance,
735 type);
736 else
737 status = ssnprintf (ret, ret_len, "%s/%s-%s/%s-%s",
738 hostname, plugin, plugin_instance,
739 type, type_instance);
740 }
742 if ((status < 1) || (status >= ret_len))
743 return (-1);
744 return (0);
745 } /* int format_name */
747 int parse_identifier (char *str, char **ret_host,
748 char **ret_plugin, char **ret_plugin_instance,
749 char **ret_type, char **ret_type_instance)
750 {
751 char *hostname = NULL;
752 char *plugin = NULL;
753 char *plugin_instance = NULL;
754 char *type = NULL;
755 char *type_instance = NULL;
757 hostname = str;
758 if (hostname == NULL)
759 return (-1);
761 plugin = strchr (hostname, '/');
762 if (plugin == NULL)
763 return (-1);
764 *plugin = '\0'; plugin++;
766 type = strchr (plugin, '/');
767 if (type == NULL)
768 return (-1);
769 *type = '\0'; type++;
771 plugin_instance = strchr (plugin, '-');
772 if (plugin_instance != NULL)
773 {
774 *plugin_instance = '\0';
775 plugin_instance++;
776 }
778 type_instance = strchr (type, '-');
779 if (type_instance != NULL)
780 {
781 *type_instance = '\0';
782 type_instance++;
783 }
785 *ret_host = hostname;
786 *ret_plugin = plugin;
787 *ret_plugin_instance = plugin_instance;
788 *ret_type = type;
789 *ret_type_instance = type_instance;
790 return (0);
791 } /* int parse_identifier */
793 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
794 {
795 int i;
796 char *dummy;
797 char *ptr;
798 char *saveptr;
800 i = -1;
801 dummy = buffer;
802 saveptr = NULL;
803 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
804 {
805 dummy = NULL;
807 if (i >= vl->values_len)
808 break;
810 if (i == -1)
811 {
812 if (strcmp ("N", ptr) == 0)
813 vl->time = time (NULL);
814 else
815 vl->time = (time_t) atoi (ptr);
816 }
817 else
818 {
819 if (strcmp ("U", ptr) == 0)
820 vl->values[i].gauge = NAN;
821 else if (ds->ds[i].type == DS_TYPE_COUNTER)
822 vl->values[i].counter = atoll (ptr);
823 else if (ds->ds[i].type == DS_TYPE_GAUGE)
824 vl->values[i].gauge = atof (ptr);
825 }
827 i++;
828 } /* while (strtok_r) */
830 if ((ptr != NULL) || (i != vl->values_len))
831 return (-1);
832 return (0);
833 } /* int parse_values */
835 #if !HAVE_GETPWNAM_R
836 int getpwnam_r (const char *name, struct passwd *pwbuf, char *buf,
837 size_t buflen, struct passwd **pwbufp)
838 {
839 int status = 0;
840 struct passwd *pw;
842 memset (pwbuf, '\0', sizeof (struct passwd));
844 pthread_mutex_lock (&getpwnam_r_lock);
846 do
847 {
848 pw = getpwnam (name);
849 if (pw == NULL)
850 {
851 status = (errno != 0) ? errno : ENOENT;
852 break;
853 }
855 #define GETPWNAM_COPY_MEMBER(member) \
856 if (pw->member != NULL) \
857 { \
858 int len = strlen (pw->member); \
859 if (len >= buflen) \
860 { \
861 status = ENOMEM; \
862 break; \
863 } \
864 sstrncpy (buf, pw->member, buflen); \
865 pwbuf->member = buf; \
866 buf += (len + 1); \
867 buflen -= (len + 1); \
868 }
869 GETPWNAM_COPY_MEMBER(pw_name);
870 GETPWNAM_COPY_MEMBER(pw_passwd);
871 GETPWNAM_COPY_MEMBER(pw_gecos);
872 GETPWNAM_COPY_MEMBER(pw_dir);
873 GETPWNAM_COPY_MEMBER(pw_shell);
875 pwbuf->pw_uid = pw->pw_uid;
876 pwbuf->pw_gid = pw->pw_gid;
878 if (pwbufp != NULL)
879 *pwbufp = pwbuf;
880 } while (0);
882 pthread_mutex_unlock (&getpwnam_r_lock);
884 return (status);
885 } /* int getpwnam_r */
886 #endif /* !HAVE_GETPWNAM_R */
888 int notification_init (notification_t *n, int severity, const char *message,
889 const char *host,
890 const char *plugin, const char *plugin_instance,
891 const char *type, const char *type_instance)
892 {
893 memset (n, '\0', sizeof (notification_t));
895 n->severity = severity;
897 if (message != NULL)
898 sstrncpy (n->message, message, sizeof (n->message));
899 if (host != NULL)
900 sstrncpy (n->host, host, sizeof (n->host));
901 if (plugin != NULL)
902 sstrncpy (n->plugin, plugin, sizeof (n->plugin));
903 if (plugin_instance != NULL)
904 sstrncpy (n->plugin_instance, plugin_instance,
905 sizeof (n->plugin_instance));
906 if (type != NULL)
907 sstrncpy (n->type, type, sizeof (n->type));
908 if (type_instance != NULL)
909 sstrncpy (n->type_instance, type_instance,
910 sizeof (n->type_instance));
912 return (0);
913 } /* int notification_init */
915 int walk_directory (const char *dir, dirwalk_callback_f callback,
916 void *user_data)
917 {
918 struct dirent *ent;
919 DIR *dh;
920 int success;
921 int failure;
923 success = 0;
924 failure = 0;
926 if ((dh = opendir (dir)) == NULL)
927 {
928 char errbuf[1024];
929 ERROR ("walk_directory: Cannot open '%s': %s", dir,
930 sstrerror (errno, errbuf, sizeof (errbuf)));
931 return -1;
932 }
934 while ((ent = readdir (dh)) != NULL)
935 {
936 int status;
938 if (ent->d_name[0] == '.')
939 continue;
941 status = (*callback) (dir, ent->d_name, user_data);
942 if (status != 0)
943 failure++;
944 else
945 success++;
946 }
948 closedir (dh);
950 if ((success == 0) && (failure > 0))
951 return (-1);
952 return (0);
953 }
955 int read_file_contents (const char *filename, char *buf, int bufsize)
956 {
957 FILE *fh;
958 int n;
960 if ((fh = fopen (filename, "r")) == NULL)
961 return -1;
963 n = fread(buf, 1, bufsize, fh);
964 fclose(fh);
966 return n;
967 }
969 counter_t counter_diff (counter_t old_value, counter_t new_value)
970 {
971 counter_t diff;
973 if (old_value > new_value)
974 {
975 if (old_value <= 4294967295U)
976 diff = (4294967295U - old_value) + new_value;
977 else
978 diff = (18446744073709551615ULL - old_value)
979 + new_value;
980 }
981 else
982 {
983 diff = new_value - old_value;
984 }
986 return (diff);
987 } /* counter_t counter_to_gauge */