1 /**
2 * collectd - src/common.c
3 * Copyright (C) 2005-2014 Florian octo Forster
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in
13 * all copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 *
23 * Authors:
24 * Florian octo Forster <octo at collectd.org>
25 * Niki W. Waibel <niki.waibel@gmx.net>
26 * Sebastian Harl <sh at tokkee.org>
27 * Michał Mirosław <mirq-linux at rere.qmqm.pl>
28 **/
30 #if HAVE_CONFIG_H
31 #include "config.h"
32 #endif
34 #include "collectd.h"
36 #include "common.h"
37 #include "plugin.h"
38 #include "utils_cache.h"
40 #ifdef HAVE_MATH_H
41 #include <math.h>
42 #endif
44 /* for getaddrinfo */
45 #include <netdb.h>
46 #include <sys/types.h>
48 #include <poll.h>
50 #if HAVE_NETINET_IN_H
51 #include <netinet/in.h>
52 #endif
54 #if HAVE_NETINET_TCP_H
55 #include <netinet/tcp.h>
56 #endif
58 /* for ntohl and htonl */
59 #if HAVE_ARPA_INET_H
60 #include <arpa/inet.h>
61 #endif
63 #if HAVE_CAPABILITY
64 #include <sys/capability.h>
65 #endif
67 #ifdef HAVE_LIBKSTAT
68 extern kstat_ctl_t *kc;
69 #endif
71 /* AIX doesn't have MSG_DONTWAIT */
72 #ifndef MSG_DONTWAIT
73 #define MSG_DONTWAIT MSG_NONBLOCK
74 #endif
76 #if !HAVE_GETPWNAM_R
77 static pthread_mutex_t getpwnam_r_lock = PTHREAD_MUTEX_INITIALIZER;
78 #endif
80 #if !HAVE_STRERROR_R
81 static pthread_mutex_t strerror_r_lock = PTHREAD_MUTEX_INITIALIZER;
82 #endif
84 char *sstrncpy(char *dest, const char *src, size_t n) {
85 strncpy(dest, src, n);
86 dest[n - 1] = '\0';
88 return (dest);
89 } /* char *sstrncpy */
91 int ssnprintf(char *dest, size_t n, const char *format, ...) {
92 int ret = 0;
93 va_list ap;
95 va_start(ap, format);
96 ret = vsnprintf(dest, n, format, ap);
97 dest[n - 1] = '\0';
98 va_end(ap);
100 return (ret);
101 } /* int ssnprintf */
103 char *ssnprintf_alloc(char const *format, ...) /* {{{ */
104 {
105 char static_buffer[1024] = "";
106 char *alloc_buffer;
107 size_t alloc_buffer_size;
108 int status;
109 va_list ap;
111 /* Try printing into the static buffer. In many cases it will be
112 * sufficiently large and we can simply return a strdup() of this
113 * buffer. */
114 va_start(ap, format);
115 status = vsnprintf(static_buffer, sizeof(static_buffer), format, ap);
116 va_end(ap);
117 if (status < 0)
118 return (NULL);
120 /* "status" does not include the null byte. */
121 alloc_buffer_size = (size_t)(status + 1);
122 if (alloc_buffer_size <= sizeof(static_buffer))
123 return (strdup(static_buffer));
125 /* Allocate a buffer large enough to hold the string. */
126 alloc_buffer = calloc(1, alloc_buffer_size);
127 if (alloc_buffer == NULL)
128 return (NULL);
130 /* Print again into this new buffer. */
131 va_start(ap, format);
132 status = vsnprintf(alloc_buffer, alloc_buffer_size, format, ap);
133 va_end(ap);
134 if (status < 0) {
135 sfree(alloc_buffer);
136 return (NULL);
137 }
139 return (alloc_buffer);
140 } /* }}} char *ssnprintf_alloc */
142 char *sstrdup(const char *s) {
143 char *r;
144 size_t sz;
146 if (s == NULL)
147 return (NULL);
149 /* Do not use `strdup' here, because it's not specified in POSIX. It's
150 * ``only'' an XSI extension. */
151 sz = strlen(s) + 1;
152 r = malloc(sz);
153 if (r == NULL) {
154 ERROR("sstrdup: Out of memory.");
155 exit(3);
156 }
157 memcpy(r, s, sizeof(char) * sz);
159 return (r);
160 } /* char *sstrdup */
162 /* Even though Posix requires "strerror_r" to return an "int",
163 * some systems (e.g. the GNU libc) return a "char *" _and_
164 * ignore the second argument ... -tokkee */
165 char *sstrerror(int errnum, char *buf, size_t buflen) {
166 buf[0] = '\0';
168 #if !HAVE_STRERROR_R
169 {
170 char *temp;
172 pthread_mutex_lock(&strerror_r_lock);
174 temp = strerror(errnum);
175 sstrncpy(buf, temp, buflen);
177 pthread_mutex_unlock(&strerror_r_lock);
178 }
179 /* #endif !HAVE_STRERROR_R */
181 #elif STRERROR_R_CHAR_P
182 {
183 char *temp;
184 temp = strerror_r(errnum, buf, buflen);
185 if (buf[0] == '\0') {
186 if ((temp != NULL) && (temp != buf) && (temp[0] != '\0'))
187 sstrncpy(buf, temp, buflen);
188 else
189 sstrncpy(buf, "strerror_r did not return "
190 "an error message",
191 buflen);
192 }
193 }
194 /* #endif STRERROR_R_CHAR_P */
196 #else
197 if (strerror_r(errnum, buf, buflen) != 0) {
198 ssnprintf(buf, buflen, "Error #%i; "
199 "Additionally, strerror_r failed.",
200 errnum);
201 }
202 #endif /* STRERROR_R_CHAR_P */
204 return (buf);
205 } /* char *sstrerror */
207 void *smalloc(size_t size) {
208 void *r;
210 if ((r = malloc(size)) == NULL) {
211 ERROR("Not enough memory.");
212 exit(3);
213 }
215 return (r);
216 } /* void *smalloc */
218 #if 0
219 void sfree (void **ptr)
220 {
221 if (ptr == NULL)
222 return;
224 if (*ptr != NULL)
225 free (*ptr);
227 *ptr = NULL;
228 }
229 #endif
231 ssize_t sread(int fd, void *buf, size_t count) {
232 char *ptr;
233 size_t nleft;
234 ssize_t status;
236 ptr = (char *)buf;
237 nleft = count;
239 while (nleft > 0) {
240 status = read(fd, (void *)ptr, nleft);
242 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
243 continue;
245 if (status < 0)
246 return (status);
248 if (status == 0) {
249 DEBUG("Received EOF from fd %i. "
250 "Closing fd and returning error.",
251 fd);
252 close(fd);
253 return (-1);
254 }
256 assert((0 > status) || (nleft >= (size_t)status));
258 nleft = nleft - ((size_t)status);
259 ptr = ptr + ((size_t)status);
260 }
262 return (0);
263 }
265 ssize_t swrite(int fd, const void *buf, size_t count) {
266 const char *ptr;
267 size_t nleft;
268 ssize_t status;
269 struct pollfd pfd;
271 ptr = (const char *)buf;
272 nleft = count;
274 if (fd < 0)
275 return (-1);
277 /* checking for closed peer connection */
278 pfd.fd = fd;
279 pfd.events = POLLIN | POLLHUP;
280 pfd.revents = 0;
281 if (poll(&pfd, 1, 0) > 0) {
282 char buffer[32];
283 if (recv(fd, buffer, sizeof(buffer), MSG_PEEK | MSG_DONTWAIT) == 0) {
284 // if recv returns zero (even though poll() said there is data to be
285 // read),
286 // that means the connection has been closed
287 return -1;
288 }
289 }
291 while (nleft > 0) {
292 status = write(fd, (const void *)ptr, nleft);
294 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
295 continue;
297 if (status < 0)
298 return (status);
300 nleft = nleft - ((size_t)status);
301 ptr = ptr + ((size_t)status);
302 }
304 return (0);
305 }
307 int strsplit(char *string, char **fields, size_t size) {
308 size_t i;
309 char *ptr;
310 char *saveptr;
312 i = 0;
313 ptr = string;
314 saveptr = NULL;
315 while ((fields[i] = strtok_r(ptr, " \t\r\n", &saveptr)) != NULL) {
316 ptr = NULL;
317 i++;
319 if (i >= size)
320 break;
321 }
323 return ((int)i);
324 }
326 int strjoin(char *buffer, size_t buffer_size, char **fields, size_t fields_num,
327 const char *sep) {
328 size_t avail;
329 char *ptr;
330 size_t sep_len;
332 if ((buffer_size < 1) || (fields_num == 0))
333 return (-1);
335 memset(buffer, 0, buffer_size);
336 ptr = buffer;
337 avail = buffer_size - 1;
339 sep_len = 0;
340 if (sep != NULL)
341 sep_len = strlen(sep);
343 for (size_t i = 0; i < fields_num; i++) {
344 size_t field_len;
346 if ((i > 0) && (sep_len > 0)) {
347 if (avail < sep_len)
348 return (-1);
350 memcpy(ptr, sep, sep_len);
351 ptr += sep_len;
352 avail -= sep_len;
353 }
355 field_len = strlen(fields[i]);
356 if (avail < field_len)
357 return (-1);
359 memcpy(ptr, fields[i], field_len);
360 ptr += field_len;
361 avail -= field_len;
362 }
364 assert(buffer[buffer_size - 1] == 0);
365 return ((int)strlen(buffer));
366 }
368 int escape_string(char *buffer, size_t buffer_size) {
369 char *temp;
370 size_t j;
372 /* Check if we need to escape at all first */
373 temp = strpbrk(buffer, " \t\"\\");
374 if (temp == NULL)
375 return (0);
377 if (buffer_size < 3)
378 return (EINVAL);
380 temp = calloc(1, buffer_size);
381 if (temp == NULL)
382 return (ENOMEM);
384 temp[0] = '"';
385 j = 1;
387 for (size_t i = 0; i < buffer_size; i++) {
388 if (buffer[i] == 0) {
389 break;
390 } else if ((buffer[i] == '"') || (buffer[i] == '\\')) {
391 if (j > (buffer_size - 4))
392 break;
393 temp[j] = '\\';
394 temp[j + 1] = buffer[i];
395 j += 2;
396 } else {
397 if (j > (buffer_size - 3))
398 break;
399 temp[j] = buffer[i];
400 j++;
401 }
402 }
404 assert((j + 1) < buffer_size);
405 temp[j] = '"';
406 temp[j + 1] = 0;
408 sstrncpy(buffer, temp, buffer_size);
409 sfree(temp);
410 return (0);
411 } /* int escape_string */
413 int strunescape(char *buf, size_t buf_len) {
414 for (size_t i = 0; (i < buf_len) && (buf[i] != '\0'); ++i) {
415 if (buf[i] != '\\')
416 continue;
418 if (((i + 1) >= buf_len) || (buf[i + 1] == 0)) {
419 ERROR("string unescape: backslash found at end of string.");
420 /* Ensure null-byte at the end of the buffer. */
421 buf[i] = 0;
422 return (-1);
423 }
425 switch (buf[i + 1]) {
426 case 't':
427 buf[i] = '\t';
428 break;
429 case 'n':
430 buf[i] = '\n';
431 break;
432 case 'r':
433 buf[i] = '\r';
434 break;
435 default:
436 buf[i] = buf[i + 1];
437 break;
438 }
440 /* Move everything after the position one position to the left.
441 * Add a null-byte as last character in the buffer. */
442 memmove(buf + i + 1, buf + i + 2, buf_len - i - 2);
443 buf[buf_len - 1] = 0;
444 }
445 return (0);
446 } /* int strunescape */
448 size_t strstripnewline(char *buffer) {
449 size_t buffer_len = strlen(buffer);
451 while (buffer_len > 0) {
452 if ((buffer[buffer_len - 1] != '\n') && (buffer[buffer_len - 1] != '\r'))
453 break;
454 buffer_len--;
455 buffer[buffer_len] = 0;
456 }
458 return (buffer_len);
459 } /* size_t strstripnewline */
461 int escape_slashes(char *buffer, size_t buffer_size) {
462 size_t buffer_len;
464 buffer_len = strlen(buffer);
466 if (buffer_len <= 1) {
467 if (strcmp("/", buffer) == 0) {
468 if (buffer_size < 5)
469 return (-1);
470 sstrncpy(buffer, "root", buffer_size);
471 }
472 return (0);
473 }
475 /* Move one to the left */
476 if (buffer[0] == '/') {
477 memmove(buffer, buffer + 1, buffer_len);
478 buffer_len--;
479 }
481 for (size_t i = 0; i < buffer_len; i++) {
482 if (buffer[i] == '/')
483 buffer[i] = '_';
484 }
486 return (0);
487 } /* int escape_slashes */
489 void replace_special(char *buffer, size_t buffer_size) {
490 for (size_t i = 0; i < buffer_size; i++) {
491 if (buffer[i] == 0)
492 return;
493 if ((!isalnum((int)buffer[i])) && (buffer[i] != '-'))
494 buffer[i] = '_';
495 }
496 } /* void replace_special */
498 int timeval_cmp(struct timeval tv0, struct timeval tv1, struct timeval *delta) {
499 struct timeval *larger;
500 struct timeval *smaller;
502 int status;
504 NORMALIZE_TIMEVAL(tv0);
505 NORMALIZE_TIMEVAL(tv1);
507 if ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec == tv1.tv_usec)) {
508 if (delta != NULL) {
509 delta->tv_sec = 0;
510 delta->tv_usec = 0;
511 }
512 return (0);
513 }
515 if ((tv0.tv_sec < tv1.tv_sec) ||
516 ((tv0.tv_sec == tv1.tv_sec) && (tv0.tv_usec < tv1.tv_usec))) {
517 larger = &tv1;
518 smaller = &tv0;
519 status = -1;
520 } else {
521 larger = &tv0;
522 smaller = &tv1;
523 status = 1;
524 }
526 if (delta != NULL) {
527 delta->tv_sec = larger->tv_sec - smaller->tv_sec;
529 if (smaller->tv_usec <= larger->tv_usec)
530 delta->tv_usec = larger->tv_usec - smaller->tv_usec;
531 else {
532 --delta->tv_sec;
533 delta->tv_usec = 1000000 + larger->tv_usec - smaller->tv_usec;
534 }
535 }
537 assert((delta == NULL) ||
538 ((0 <= delta->tv_usec) && (delta->tv_usec < 1000000)));
540 return (status);
541 } /* int timeval_cmp */
543 int check_create_dir(const char *file_orig) {
544 struct stat statbuf;
546 char file_copy[512];
547 char dir[512];
548 int dir_len = 512;
549 char *fields[16];
550 int fields_num;
551 char *ptr;
552 char *saveptr;
553 int last_is_file = 1;
554 int path_is_absolute = 0;
555 size_t len;
557 /*
558 * Sanity checks first
559 */
560 if (file_orig == NULL)
561 return (-1);
563 if ((len = strlen(file_orig)) < 1)
564 return (-1);
565 else if (len >= sizeof(file_copy))
566 return (-1);
568 /*
569 * If `file_orig' ends in a slash the last component is a directory,
570 * otherwise it's a file. Act accordingly..
571 */
572 if (file_orig[len - 1] == '/')
573 last_is_file = 0;
574 if (file_orig[0] == '/')
575 path_is_absolute = 1;
577 /*
578 * Create a copy for `strtok_r' to destroy
579 */
580 sstrncpy(file_copy, file_orig, sizeof(file_copy));
582 /*
583 * Break into components. This will eat up several slashes in a row and
584 * remove leading and trailing slashes..
585 */
586 ptr = file_copy;
587 saveptr = NULL;
588 fields_num = 0;
589 while ((fields[fields_num] = strtok_r(ptr, "/", &saveptr)) != NULL) {
590 ptr = NULL;
591 fields_num++;
593 if (fields_num >= 16)
594 break;
595 }
597 /*
598 * For each component, do..
599 */
600 for (int i = 0; i < (fields_num - last_is_file); i++) {
601 /*
602 * Do not create directories that start with a dot. This
603 * prevents `../../' attacks and other likely malicious
604 * behavior.
605 */
606 if (fields[i][0] == '.') {
607 ERROR("Cowardly refusing to create a directory that "
608 "begins with a `.' (dot): `%s'",
609 file_orig);
610 return (-2);
611 }
613 /*
614 * Join the components together again
615 */
616 dir[0] = '/';
617 if (strjoin(dir + path_is_absolute, (size_t)(dir_len - path_is_absolute),
618 fields, (size_t)(i + 1), "/") < 0) {
619 ERROR("strjoin failed: `%s', component #%i", file_orig, i);
620 return (-1);
621 }
623 while (42) {
624 if ((stat(dir, &statbuf) == -1) && (lstat(dir, &statbuf) == -1)) {
625 if (errno == ENOENT) {
626 if (mkdir(dir, S_IRWXU | S_IRWXG | S_IRWXO) == 0)
627 break;
629 /* this might happen, if a different thread created
630 * the directory in the meantime
631 * => call stat() again to check for S_ISDIR() */
632 if (EEXIST == errno)
633 continue;
635 char errbuf[1024];
636 ERROR("check_create_dir: mkdir (%s): %s", dir,
637 sstrerror(errno, errbuf, sizeof(errbuf)));
638 return (-1);
639 } else {
640 char errbuf[1024];
641 ERROR("check_create_dir: stat (%s): %s", dir,
642 sstrerror(errno, errbuf, sizeof(errbuf)));
643 return (-1);
644 }
645 } else if (!S_ISDIR(statbuf.st_mode)) {
646 ERROR("check_create_dir: `%s' exists but is not "
647 "a directory!",
648 dir);
649 return (-1);
650 }
651 break;
652 }
653 }
655 return (0);
656 } /* check_create_dir */
658 #ifdef HAVE_LIBKSTAT
659 int get_kstat(kstat_t **ksp_ptr, char *module, int instance, char *name) {
660 char ident[128];
662 *ksp_ptr = NULL;
664 if (kc == NULL)
665 return (-1);
667 ssnprintf(ident, sizeof(ident), "%s,%i,%s", module, instance, name);
669 *ksp_ptr = kstat_lookup(kc, module, instance, name);
670 if (*ksp_ptr == NULL) {
671 ERROR("get_kstat: Cound not find kstat %s", ident);
672 return (-1);
673 }
675 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED) {
676 ERROR("get_kstat: kstat %s has wrong type", ident);
677 *ksp_ptr = NULL;
678 return (-1);
679 }
681 #ifdef assert
682 assert(*ksp_ptr != NULL);
683 assert((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
684 #endif
686 if (kstat_read(kc, *ksp_ptr, NULL) == -1) {
687 ERROR("get_kstat: kstat %s could not be read", ident);
688 return (-1);
689 }
691 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED) {
692 ERROR("get_kstat: kstat %s has wrong type", ident);
693 return (-1);
694 }
696 return (0);
697 }
699 long long get_kstat_value(kstat_t *ksp, char *name) {
700 kstat_named_t *kn;
701 long long retval = -1LL;
703 if (ksp == NULL) {
704 ERROR("get_kstat_value (\"%s\"): ksp is NULL.", name);
705 return (-1LL);
706 } else if (ksp->ks_type != KSTAT_TYPE_NAMED) {
707 ERROR("get_kstat_value (\"%s\"): ksp->ks_type (%#x) "
708 "is not KSTAT_TYPE_NAMED (%#x).",
709 name, (unsigned int)ksp->ks_type, (unsigned int)KSTAT_TYPE_NAMED);
710 return (-1LL);
711 }
713 if ((kn = (kstat_named_t *)kstat_data_lookup(ksp, name)) == NULL)
714 return (-1LL);
716 if (kn->data_type == KSTAT_DATA_INT32)
717 retval = (long long)kn->value.i32;
718 else if (kn->data_type == KSTAT_DATA_UINT32)
719 retval = (long long)kn->value.ui32;
720 else if (kn->data_type == KSTAT_DATA_INT64)
721 retval =
722 (long long)kn->value.i64; /* According to ANSI C99 `long long' must hold
723 at least 64 bits */
724 else if (kn->data_type == KSTAT_DATA_UINT64)
725 retval = (long long)kn->value.ui64; /* XXX: Might overflow! */
726 else
727 WARNING("get_kstat_value: Not a numeric value: %s", name);
729 return (retval);
730 }
731 #endif /* HAVE_LIBKSTAT */
733 #ifndef HAVE_HTONLL
734 unsigned long long ntohll(unsigned long long n) {
735 #if BYTE_ORDER == BIG_ENDIAN
736 return (n);
737 #else
738 return (((unsigned long long)ntohl(n)) << 32) + ntohl(n >> 32);
739 #endif
740 } /* unsigned long long ntohll */
742 unsigned long long htonll(unsigned long long n) {
743 #if BYTE_ORDER == BIG_ENDIAN
744 return (n);
745 #else
746 return (((unsigned long long)htonl(n)) << 32) + htonl(n >> 32);
747 #endif
748 } /* unsigned long long htonll */
749 #endif /* HAVE_HTONLL */
751 #if FP_LAYOUT_NEED_NOTHING
752 /* Well, we need nothing.. */
753 /* #endif FP_LAYOUT_NEED_NOTHING */
755 #elif FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP
756 #if FP_LAYOUT_NEED_ENDIANFLIP
757 #define FP_CONVERT(A) \
758 ((((uint64_t)(A)&0xff00000000000000LL) >> 56) | \
759 (((uint64_t)(A)&0x00ff000000000000LL) >> 40) | \
760 (((uint64_t)(A)&0x0000ff0000000000LL) >> 24) | \
761 (((uint64_t)(A)&0x000000ff00000000LL) >> 8) | \
762 (((uint64_t)(A)&0x00000000ff000000LL) << 8) | \
763 (((uint64_t)(A)&0x0000000000ff0000LL) << 24) | \
764 (((uint64_t)(A)&0x000000000000ff00LL) << 40) | \
765 (((uint64_t)(A)&0x00000000000000ffLL) << 56))
766 #else
767 #define FP_CONVERT(A) \
768 ((((uint64_t)(A)&0xffffffff00000000LL) >> 32) | \
769 (((uint64_t)(A)&0x00000000ffffffffLL) << 32))
770 #endif
772 double ntohd(double d) {
773 union {
774 uint8_t byte[8];
775 uint64_t integer;
776 double floating;
777 } ret;
779 ret.floating = d;
781 /* NAN in x86 byte order */
782 if ((ret.byte[0] == 0x00) && (ret.byte[1] == 0x00) && (ret.byte[2] == 0x00) &&
783 (ret.byte[3] == 0x00) && (ret.byte[4] == 0x00) && (ret.byte[5] == 0x00) &&
784 (ret.byte[6] == 0xf8) && (ret.byte[7] == 0x7f)) {
785 return (NAN);
786 } else {
787 uint64_t tmp;
789 tmp = ret.integer;
790 ret.integer = FP_CONVERT(tmp);
791 return (ret.floating);
792 }
793 } /* double ntohd */
795 double htond(double d) {
796 union {
797 uint8_t byte[8];
798 uint64_t integer;
799 double floating;
800 } ret;
802 if (isnan(d)) {
803 ret.byte[0] = ret.byte[1] = ret.byte[2] = ret.byte[3] = 0x00;
804 ret.byte[4] = ret.byte[5] = 0x00;
805 ret.byte[6] = 0xf8;
806 ret.byte[7] = 0x7f;
807 return (ret.floating);
808 } else {
809 uint64_t tmp;
811 ret.floating = d;
812 tmp = FP_CONVERT(ret.integer);
813 ret.integer = tmp;
814 return (ret.floating);
815 }
816 } /* double htond */
817 #endif /* FP_LAYOUT_NEED_ENDIANFLIP || FP_LAYOUT_NEED_INTSWAP */
819 int format_name(char *ret, int ret_len, const char *hostname,
820 const char *plugin, const char *plugin_instance,
821 const char *type, const char *type_instance) {
822 char *buffer;
823 size_t buffer_size;
825 buffer = ret;
826 buffer_size = (size_t)ret_len;
828 #define APPEND(str) \
829 do { \
830 size_t l = strlen(str); \
831 if (l >= buffer_size) \
832 return (ENOBUFS); \
833 memcpy(buffer, (str), l); \
834 buffer += l; \
835 buffer_size -= l; \
836 } while (0)
838 assert(plugin != NULL);
839 assert(type != NULL);
841 APPEND(hostname);
842 APPEND("/");
843 APPEND(plugin);
844 if ((plugin_instance != NULL) && (plugin_instance[0] != 0)) {
845 APPEND("-");
846 APPEND(plugin_instance);
847 }
848 APPEND("/");
849 APPEND(type);
850 if ((type_instance != NULL) && (type_instance[0] != 0)) {
851 APPEND("-");
852 APPEND(type_instance);
853 }
854 assert(buffer_size > 0);
855 buffer[0] = 0;
857 #undef APPEND
858 return (0);
859 } /* int format_name */
861 int format_values(char *ret, size_t ret_len, /* {{{ */
862 const data_set_t *ds, const value_list_t *vl,
863 _Bool store_rates) {
864 size_t offset = 0;
865 int status;
866 gauge_t *rates = NULL;
868 assert(0 == strcmp(ds->type, vl->type));
870 memset(ret, 0, ret_len);
872 #define BUFFER_ADD(...) \
873 do { \
874 status = ssnprintf(ret + offset, ret_len - offset, __VA_ARGS__); \
875 if (status < 1) { \
876 sfree(rates); \
877 return (-1); \
878 } else if (((size_t)status) >= (ret_len - offset)) { \
879 sfree(rates); \
880 return (-1); \
881 } else \
882 offset += ((size_t)status); \
883 } while (0)
885 BUFFER_ADD("%.3f", CDTIME_T_TO_DOUBLE(vl->time));
887 for (size_t i = 0; i < ds->ds_num; i++) {
888 if (ds->ds[i].type == DS_TYPE_GAUGE)
889 BUFFER_ADD(":" GAUGE_FORMAT, vl->values[i].gauge);
890 else if (store_rates) {
891 if (rates == NULL)
892 rates = uc_get_rate(ds, vl);
893 if (rates == NULL) {
894 WARNING("format_values: uc_get_rate failed.");
895 return (-1);
896 }
897 BUFFER_ADD(":" GAUGE_FORMAT, rates[i]);
898 } else if (ds->ds[i].type == DS_TYPE_COUNTER)
899 BUFFER_ADD(":%llu", vl->values[i].counter);
900 else if (ds->ds[i].type == DS_TYPE_DERIVE)
901 BUFFER_ADD(":%" PRIi64, vl->values[i].derive);
902 else if (ds->ds[i].type == DS_TYPE_ABSOLUTE)
903 BUFFER_ADD(":%" PRIu64, vl->values[i].absolute);
904 else {
905 ERROR("format_values: Unknown data source type: %i", ds->ds[i].type);
906 sfree(rates);
907 return (-1);
908 }
909 } /* for ds->ds_num */
911 #undef BUFFER_ADD
913 sfree(rates);
914 return (0);
915 } /* }}} int format_values */
917 int parse_identifier(char *str, char **ret_host, char **ret_plugin,
918 char **ret_plugin_instance, char **ret_type,
919 char **ret_type_instance) {
920 char *hostname = NULL;
921 char *plugin = NULL;
922 char *plugin_instance = NULL;
923 char *type = NULL;
924 char *type_instance = NULL;
926 hostname = str;
927 if (hostname == NULL)
928 return (-1);
930 plugin = strchr(hostname, '/');
931 if (plugin == NULL)
932 return (-1);
933 *plugin = '\0';
934 plugin++;
936 type = strchr(plugin, '/');
937 if (type == NULL)
938 return (-1);
939 *type = '\0';
940 type++;
942 plugin_instance = strchr(plugin, '-');
943 if (plugin_instance != NULL) {
944 *plugin_instance = '\0';
945 plugin_instance++;
946 }
948 type_instance = strchr(type, '-');
949 if (type_instance != NULL) {
950 *type_instance = '\0';
951 type_instance++;
952 }
954 *ret_host = hostname;
955 *ret_plugin = plugin;
956 *ret_plugin_instance = plugin_instance;
957 *ret_type = type;
958 *ret_type_instance = type_instance;
959 return (0);
960 } /* int parse_identifier */
962 int parse_identifier_vl(const char *str, value_list_t *vl) /* {{{ */
963 {
964 char str_copy[6 * DATA_MAX_NAME_LEN];
965 char *host = NULL;
966 char *plugin = NULL;
967 char *plugin_instance = NULL;
968 char *type = NULL;
969 char *type_instance = NULL;
970 int status;
972 if ((str == NULL) || (vl == NULL))
973 return (EINVAL);
975 sstrncpy(str_copy, str, sizeof(str_copy));
977 status = parse_identifier(str_copy, &host, &plugin, &plugin_instance, &type,
978 &type_instance);
979 if (status != 0)
980 return (status);
982 sstrncpy(vl->host, host, sizeof(vl->host));
983 sstrncpy(vl->plugin, plugin, sizeof(vl->plugin));
984 sstrncpy(vl->plugin_instance,
985 (plugin_instance != NULL) ? plugin_instance : "",
986 sizeof(vl->plugin_instance));
987 sstrncpy(vl->type, type, sizeof(vl->type));
988 sstrncpy(vl->type_instance, (type_instance != NULL) ? type_instance : "",
989 sizeof(vl->type_instance));
991 return (0);
992 } /* }}} int parse_identifier_vl */
994 int parse_value(const char *value_orig, value_t *ret_value, int ds_type) {
995 char *value;
996 char *endptr = NULL;
997 size_t value_len;
999 if (value_orig == NULL)
1000 return (EINVAL);
1002 value = strdup(value_orig);
1003 if (value == NULL)
1004 return (ENOMEM);
1005 value_len = strlen(value);
1007 while ((value_len > 0) && isspace((int)value[value_len - 1])) {
1008 value[value_len - 1] = 0;
1009 value_len--;
1010 }
1012 switch (ds_type) {
1013 case DS_TYPE_COUNTER:
1014 ret_value->counter = (counter_t)strtoull(value, &endptr, 0);
1015 break;
1017 case DS_TYPE_GAUGE:
1018 ret_value->gauge = (gauge_t)strtod(value, &endptr);
1019 break;
1021 case DS_TYPE_DERIVE:
1022 ret_value->derive = (derive_t)strtoll(value, &endptr, 0);
1023 break;
1025 case DS_TYPE_ABSOLUTE:
1026 ret_value->absolute = (absolute_t)strtoull(value, &endptr, 0);
1027 break;
1029 default:
1030 sfree(value);
1031 ERROR("parse_value: Invalid data source type: %i.", ds_type);
1032 return -1;
1033 }
1035 if (value == endptr) {
1036 ERROR("parse_value: Failed to parse string as %s: \"%s\".",
1037 DS_TYPE_TO_STRING(ds_type), value);
1038 sfree(value);
1039 return -1;
1040 } else if ((NULL != endptr) && ('\0' != *endptr))
1041 INFO("parse_value: Ignoring trailing garbage \"%s\" after %s value. "
1042 "Input string was \"%s\".",
1043 endptr, DS_TYPE_TO_STRING(ds_type), value_orig);
1045 sfree(value);
1046 return 0;
1047 } /* int parse_value */
1049 int parse_values(char *buffer, value_list_t *vl, const data_set_t *ds) {
1050 size_t i;
1051 char *dummy;
1052 char *ptr;
1053 char *saveptr;
1055 if ((buffer == NULL) || (vl == NULL) || (ds == NULL))
1056 return EINVAL;
1058 i = 0;
1059 dummy = buffer;
1060 saveptr = NULL;
1061 vl->time = 0;
1062 while ((ptr = strtok_r(dummy, ":", &saveptr)) != NULL) {
1063 dummy = NULL;
1065 if (i >= vl->values_len) {
1066 /* Make sure i is invalid. */
1067 i = 0;
1068 break;
1069 }
1071 if (vl->time == 0) {
1072 if (strcmp("N", ptr) == 0)
1073 vl->time = cdtime();
1074 else {
1075 char *endptr = NULL;
1076 double tmp;
1078 errno = 0;
1079 tmp = strtod(ptr, &endptr);
1080 if ((errno != 0) /* Overflow */
1081 || (endptr == ptr) /* Invalid string */
1082 || (endptr == NULL) /* This should not happen */
1083 || (*endptr != 0)) /* Trailing chars */
1084 return (-1);
1086 vl->time = DOUBLE_TO_CDTIME_T(tmp);
1087 }
1089 continue;
1090 }
1092 if ((strcmp("U", ptr) == 0) && (ds->ds[i].type == DS_TYPE_GAUGE))
1093 vl->values[i].gauge = NAN;
1094 else if (0 != parse_value(ptr, &vl->values[i], ds->ds[i].type))
1095 return -1;
1097 i++;
1098 } /* while (strtok_r) */
1100 if ((ptr != NULL) || (i == 0))
1101 return (-1);
1102 return (0);
1103 } /* int parse_values */
1105 #if !HAVE_GETPWNAM_R
1106 int getpwnam_r(const char *name, struct passwd *pwbuf, char *buf, size_t buflen,
1107 struct passwd **pwbufp) {
1108 int status = 0;
1109 struct passwd *pw;
1111 memset(pwbuf, '\0', sizeof(struct passwd));
1113 pthread_mutex_lock(&getpwnam_r_lock);
1115 do {
1116 pw = getpwnam(name);
1117 if (pw == NULL) {
1118 status = (errno != 0) ? errno : ENOENT;
1119 break;
1120 }
1122 #define GETPWNAM_COPY_MEMBER(member) \
1123 if (pw->member != NULL) { \
1124 int len = strlen(pw->member); \
1125 if (len >= buflen) { \
1126 status = ENOMEM; \
1127 break; \
1128 } \
1129 sstrncpy(buf, pw->member, buflen); \
1130 pwbuf->member = buf; \
1131 buf += (len + 1); \
1132 buflen -= (len + 1); \
1133 }
1134 GETPWNAM_COPY_MEMBER(pw_name);
1135 GETPWNAM_COPY_MEMBER(pw_passwd);
1136 GETPWNAM_COPY_MEMBER(pw_gecos);
1137 GETPWNAM_COPY_MEMBER(pw_dir);
1138 GETPWNAM_COPY_MEMBER(pw_shell);
1140 pwbuf->pw_uid = pw->pw_uid;
1141 pwbuf->pw_gid = pw->pw_gid;
1143 if (pwbufp != NULL)
1144 *pwbufp = pwbuf;
1145 } while (0);
1147 pthread_mutex_unlock(&getpwnam_r_lock);
1149 return (status);
1150 } /* int getpwnam_r */
1151 #endif /* !HAVE_GETPWNAM_R */
1153 int notification_init(notification_t *n, int severity, const char *message,
1154 const char *host, const char *plugin,
1155 const char *plugin_instance, const char *type,
1156 const char *type_instance) {
1157 memset(n, '\0', sizeof(notification_t));
1159 n->severity = severity;
1161 if (message != NULL)
1162 sstrncpy(n->message, message, sizeof(n->message));
1163 if (host != NULL)
1164 sstrncpy(n->host, host, sizeof(n->host));
1165 if (plugin != NULL)
1166 sstrncpy(n->plugin, plugin, sizeof(n->plugin));
1167 if (plugin_instance != NULL)
1168 sstrncpy(n->plugin_instance, plugin_instance, sizeof(n->plugin_instance));
1169 if (type != NULL)
1170 sstrncpy(n->type, type, sizeof(n->type));
1171 if (type_instance != NULL)
1172 sstrncpy(n->type_instance, type_instance, sizeof(n->type_instance));
1174 return (0);
1175 } /* int notification_init */
1177 int walk_directory(const char *dir, dirwalk_callback_f callback,
1178 void *user_data, int include_hidden) {
1179 struct dirent *ent;
1180 DIR *dh;
1181 int success;
1182 int failure;
1184 success = 0;
1185 failure = 0;
1187 if ((dh = opendir(dir)) == NULL) {
1188 char errbuf[1024];
1189 ERROR("walk_directory: Cannot open '%s': %s", dir,
1190 sstrerror(errno, errbuf, sizeof(errbuf)));
1191 return -1;
1192 }
1194 while ((ent = readdir(dh)) != NULL) {
1195 int status;
1197 if (include_hidden) {
1198 if ((strcmp(".", ent->d_name) == 0) || (strcmp("..", ent->d_name) == 0))
1199 continue;
1200 } else /* if (!include_hidden) */
1201 {
1202 if (ent->d_name[0] == '.')
1203 continue;
1204 }
1206 status = (*callback)(dir, ent->d_name, user_data);
1207 if (status != 0)
1208 failure++;
1209 else
1210 success++;
1211 }
1213 closedir(dh);
1215 if ((success == 0) && (failure > 0))
1216 return (-1);
1217 return (0);
1218 }
1220 ssize_t read_file_contents(const char *filename, char *buf, size_t bufsize) {
1221 FILE *fh;
1222 ssize_t ret;
1224 fh = fopen(filename, "r");
1225 if (fh == NULL)
1226 return (-1);
1228 ret = (ssize_t)fread(buf, 1, bufsize, fh);
1229 if ((ret == 0) && (ferror(fh) != 0)) {
1230 ERROR("read_file_contents: Reading file \"%s\" failed.", filename);
1231 ret = -1;
1232 }
1234 fclose(fh);
1235 return (ret);
1236 }
1238 counter_t counter_diff(counter_t old_value, counter_t new_value) {
1239 counter_t diff;
1241 if (old_value > new_value) {
1242 if (old_value <= 4294967295U)
1243 diff = (4294967295U - old_value) + new_value + 1;
1244 else
1245 diff = (18446744073709551615ULL - old_value) + new_value + 1;
1246 } else {
1247 diff = new_value - old_value;
1248 }
1250 return (diff);
1251 } /* counter_t counter_diff */
1253 int rate_to_value(value_t *ret_value, gauge_t rate, /* {{{ */
1254 rate_to_value_state_t *state, int ds_type, cdtime_t t) {
1255 gauge_t delta_gauge;
1256 cdtime_t delta_t;
1258 if (ds_type == DS_TYPE_GAUGE) {
1259 state->last_value.gauge = rate;
1260 state->last_time = t;
1262 *ret_value = state->last_value;
1263 return (0);
1264 }
1266 /* Counter and absolute can't handle negative rates. Reset "last time"
1267 * to zero, so that the next valid rate will re-initialize the
1268 * structure. */
1269 if ((rate < 0.0) &&
1270 ((ds_type == DS_TYPE_COUNTER) || (ds_type == DS_TYPE_ABSOLUTE))) {
1271 memset(state, 0, sizeof(*state));
1272 return (EINVAL);
1273 }
1275 /* Another invalid state: The time is not increasing. */
1276 if (t <= state->last_time) {
1277 memset(state, 0, sizeof(*state));
1278 return (EINVAL);
1279 }
1281 delta_t = t - state->last_time;
1282 delta_gauge = (rate * CDTIME_T_TO_DOUBLE(delta_t)) + state->residual;
1284 /* Previous value is invalid. */
1285 if (state->last_time == 0) /* {{{ */
1286 {
1287 if (ds_type == DS_TYPE_DERIVE) {
1288 state->last_value.derive = (derive_t)rate;
1289 state->residual = rate - ((gauge_t)state->last_value.derive);
1290 } else if (ds_type == DS_TYPE_COUNTER) {
1291 state->last_value.counter = (counter_t)rate;
1292 state->residual = rate - ((gauge_t)state->last_value.counter);
1293 } else if (ds_type == DS_TYPE_ABSOLUTE) {
1294 state->last_value.absolute = (absolute_t)rate;
1295 state->residual = rate - ((gauge_t)state->last_value.absolute);
1296 } else {
1297 assert(23 == 42);
1298 }
1300 state->last_time = t;
1301 return (EAGAIN);
1302 } /* }}} */
1304 if (ds_type == DS_TYPE_DERIVE) {
1305 derive_t delta_derive = (derive_t)delta_gauge;
1307 state->last_value.derive += delta_derive;
1308 state->residual = delta_gauge - ((gauge_t)delta_derive);
1309 } else if (ds_type == DS_TYPE_COUNTER) {
1310 counter_t delta_counter = (counter_t)delta_gauge;
1312 state->last_value.counter += delta_counter;
1313 state->residual = delta_gauge - ((gauge_t)delta_counter);
1314 } else if (ds_type == DS_TYPE_ABSOLUTE) {
1315 absolute_t delta_absolute = (absolute_t)delta_gauge;
1317 state->last_value.absolute = delta_absolute;
1318 state->residual = delta_gauge - ((gauge_t)delta_absolute);
1319 } else {
1320 assert(23 == 42);
1321 }
1323 state->last_time = t;
1324 *ret_value = state->last_value;
1325 return (0);
1326 } /* }}} value_t rate_to_value */
1328 int value_to_rate(gauge_t *ret_rate, /* {{{ */
1329 value_t value, int ds_type, cdtime_t t,
1330 value_to_rate_state_t *state) {
1331 gauge_t interval;
1333 /* Another invalid state: The time is not increasing. */
1334 if (t <= state->last_time) {
1335 memset(state, 0, sizeof(*state));
1336 return (EINVAL);
1337 }
1339 interval = CDTIME_T_TO_DOUBLE(t - state->last_time);
1341 /* Previous value is invalid. */
1342 if (state->last_time == 0) {
1343 state->last_value = value;
1344 state->last_time = t;
1345 return (EAGAIN);
1346 }
1348 switch (ds_type) {
1349 case DS_TYPE_DERIVE: {
1350 derive_t diff = value.derive - state->last_value.derive;
1351 *ret_rate = ((gauge_t)diff) / ((gauge_t)interval);
1352 break;
1353 }
1354 case DS_TYPE_GAUGE: {
1355 *ret_rate = value.gauge;
1356 break;
1357 }
1358 case DS_TYPE_COUNTER: {
1359 counter_t diff = counter_diff(state->last_value.counter, value.counter);
1360 *ret_rate = ((gauge_t)diff) / ((gauge_t)interval);
1361 break;
1362 }
1363 case DS_TYPE_ABSOLUTE: {
1364 absolute_t diff = value.absolute;
1365 *ret_rate = ((gauge_t)diff) / ((gauge_t)interval);
1366 break;
1367 }
1368 default:
1369 return EINVAL;
1370 }
1372 state->last_value = value;
1373 state->last_time = t;
1374 return (0);
1375 } /* }}} value_t rate_to_value */
1377 int service_name_to_port_number(const char *service_name) {
1378 struct addrinfo *ai_list;
1379 int status;
1380 int service_number;
1382 if (service_name == NULL)
1383 return (-1);
1385 struct addrinfo ai_hints = {.ai_family = AF_UNSPEC};
1387 status = getaddrinfo(/* node = */ NULL, service_name, &ai_hints, &ai_list);
1388 if (status != 0) {
1389 ERROR("service_name_to_port_number: getaddrinfo failed: %s",
1390 gai_strerror(status));
1391 return (-1);
1392 }
1394 service_number = -1;
1395 for (struct addrinfo *ai_ptr = ai_list; ai_ptr != NULL;
1396 ai_ptr = ai_ptr->ai_next) {
1397 if (ai_ptr->ai_family == AF_INET) {
1398 struct sockaddr_in *sa;
1400 sa = (void *)ai_ptr->ai_addr;
1401 service_number = (int)ntohs(sa->sin_port);
1402 } else if (ai_ptr->ai_family == AF_INET6) {
1403 struct sockaddr_in6 *sa;
1405 sa = (void *)ai_ptr->ai_addr;
1406 service_number = (int)ntohs(sa->sin6_port);
1407 }
1409 if ((service_number > 0) && (service_number <= 65535))
1410 break;
1411 }
1413 freeaddrinfo(ai_list);
1415 if ((service_number > 0) && (service_number <= 65535))
1416 return (service_number);
1417 return (-1);
1418 } /* int service_name_to_port_number */
1420 void set_sock_opts(int sockfd) /* {{{ */
1421 {
1422 int status;
1423 int socktype;
1425 socklen_t socklen = sizeof(socklen_t);
1426 int so_keepalive = 1;
1428 status = getsockopt(sockfd, SOL_SOCKET, SO_TYPE, &socktype, &socklen);
1429 if (status != 0) {
1430 WARNING("set_sock_opts: failed to determine socket type");
1431 return;
1432 }
1434 if (socktype == SOCK_STREAM) {
1435 status = setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &so_keepalive,
1436 sizeof(so_keepalive));
1437 if (status != 0)
1438 WARNING("set_sock_opts: failed to set socket keepalive flag");
1440 #ifdef TCP_KEEPIDLE
1441 int tcp_keepidle = ((CDTIME_T_TO_MS(plugin_get_interval()) - 1) / 100 + 1);
1442 status = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPIDLE, &tcp_keepidle,
1443 sizeof(tcp_keepidle));
1444 if (status != 0)
1445 WARNING("set_sock_opts: failed to set socket tcp keepalive time");
1446 #endif
1448 #ifdef TCP_KEEPINTVL
1449 int tcp_keepintvl =
1450 ((CDTIME_T_TO_MS(plugin_get_interval()) - 1) / 1000 + 1);
1451 status = setsockopt(sockfd, IPPROTO_TCP, TCP_KEEPINTVL, &tcp_keepintvl,
1452 sizeof(tcp_keepintvl));
1453 if (status != 0)
1454 WARNING("set_sock_opts: failed to set socket tcp keepalive interval");
1455 #endif
1456 }
1457 } /* }}} void set_sock_opts */
1459 int strtoderive(const char *string, derive_t *ret_value) /* {{{ */
1460 {
1461 derive_t tmp;
1462 char *endptr;
1464 if ((string == NULL) || (ret_value == NULL))
1465 return (EINVAL);
1467 errno = 0;
1468 endptr = NULL;
1469 tmp = (derive_t)strtoll(string, &endptr, /* base = */ 0);
1470 if ((endptr == string) || (errno != 0))
1471 return (-1);
1473 *ret_value = tmp;
1474 return (0);
1475 } /* }}} int strtoderive */
1477 int strtogauge(const char *string, gauge_t *ret_value) /* {{{ */
1478 {
1479 gauge_t tmp;
1480 char *endptr = NULL;
1482 if ((string == NULL) || (ret_value == NULL))
1483 return (EINVAL);
1485 errno = 0;
1486 endptr = NULL;
1487 tmp = (gauge_t)strtod(string, &endptr);
1488 if (errno != 0)
1489 return (errno);
1490 else if ((endptr == NULL) || (*endptr != 0))
1491 return (EINVAL);
1493 *ret_value = tmp;
1494 return (0);
1495 } /* }}} int strtogauge */
1497 int strarray_add(char ***ret_array, size_t *ret_array_len,
1498 char const *str) /* {{{ */
1499 {
1500 char **array;
1501 size_t array_len = *ret_array_len;
1503 if (str == NULL)
1504 return (EINVAL);
1506 array = realloc(*ret_array, (array_len + 1) * sizeof(*array));
1507 if (array == NULL)
1508 return (ENOMEM);
1509 *ret_array = array;
1511 array[array_len] = strdup(str);
1512 if (array[array_len] == NULL)
1513 return (ENOMEM);
1515 array_len++;
1516 *ret_array_len = array_len;
1517 return (0);
1518 } /* }}} int strarray_add */
1520 void strarray_free(char **array, size_t array_len) /* {{{ */
1521 {
1522 for (size_t i = 0; i < array_len; i++)
1523 sfree(array[i]);
1524 sfree(array);
1525 } /* }}} void strarray_free */
1527 #if HAVE_CAPABILITY
1528 int check_capability(int arg) /* {{{ */
1529 {
1530 cap_value_t cap = (cap_value_t)arg;
1532 if (!CAP_IS_SUPPORTED(cap))
1533 return (-1);
1535 int have_cap = cap_get_bound(cap);
1536 if (have_cap != 1)
1537 return (-1);
1539 return (0);
1540 } /* }}} int check_capability */
1541 #else
1542 int check_capability(__attribute__((unused)) int arg) /* {{{ */
1543 {
1544 WARNING("check_capability: unsupported capability implementation. "
1545 "Some plugin(s) may require elevated privileges to work properly.");
1546 return (0);
1547 } /* }}} int check_capability */
1548 #endif /* HAVE_CAPABILITY */