2 * collectd - src/common.c
3 * Copyright (C) 2005-2007 Florian octo Forster
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.
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.
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
19 * Florian octo Forster <octo at verplant.org>
20 * Niki W. Waibel <niki.waibel@gmx.net>
34 /* for ntohl and htonl */
36 # include <arpa/inet.h>
40 extern kstat_ctl_t *kc;
43 void sstrncpy (char *d, const char *s, int len)
49 char *sstrdup (const char *s)
56 if((r = strdup (s)) == NULL)
58 DEBUG ("Not enough memory.");
65 /* Don't use the return value of `strerror_r', because the GNU-people got
66 * inventive there.. -octo */
67 char *sstrerror (int errnum, char *buf, size_t buflen)
70 strerror_r (errnum, buf, buflen);
72 } /* char *sstrerror */
74 void *smalloc (size_t size)
78 if ((r = malloc (size)) == NULL)
80 DEBUG("Not enough memory.");
88 void sfree (void **ptr)
100 ssize_t sread (int fd, void *buf, size_t count)
111 status = read (fd, (void *) ptr, nleft);
113 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
121 DEBUG ("Received EOF from fd %i. "
122 "Closing fd and returning error.",
128 assert (nleft >= status);
130 nleft = nleft - status;
138 ssize_t swrite (int fd, const void *buf, size_t count)
144 ptr = (const char *) buf;
149 status = write (fd, (const void *) ptr, nleft);
151 if ((status < 0) && ((errno == EAGAIN) || (errno == EINTR)))
157 nleft = nleft - status;
164 int strsplit (char *string, char **fields, size_t size)
173 while ((fields[i] = strtok_r (ptr, " \t", &saveptr)) != NULL)
185 int strjoin (char *dst, size_t dst_len,
186 char **fields, size_t fields_num,
193 memset (dst, '\0', dst_len);
200 sep_len = strlen (sep);
202 for (i = 0; i < fields_num; i++)
204 if ((i > 0) && (sep_len > 0))
206 if (dst_len <= sep_len)
209 strncat (dst, sep, dst_len);
213 field_len = strlen (fields[i]);
215 if (dst_len <= field_len)
218 strncat (dst, fields[i], dst_len);
219 dst_len -= field_len;
222 return (strlen (dst));
225 int strsubstitute (char *str, char c_from, char c_to)
244 } /* int strsubstitute */
246 int escape_slashes (char *buf, int buf_len)
250 if (strcmp (buf, "/") == 0)
255 strncpy (buf, "root", buf_len);
262 /* Move one to the left */
264 memmove (buf, buf + 1, buf_len - 1);
266 for (i = 0; i < buf_len - 1; i++)
270 else if (buf[i] == '/')
276 } /* int escape_slashes */
278 int timeval_sub_timespec (struct timeval *tv0, struct timeval *tv1, struct timespec *ret)
280 if ((tv0 == NULL) || (tv1 == NULL) || (ret == NULL))
283 if ((tv0->tv_sec < tv1->tv_sec)
284 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
287 ret->tv_sec = tv0->tv_sec - tv1->tv_sec;
288 ret->tv_nsec = 1000 * ((long) (tv0->tv_usec - tv1->tv_usec));
290 if (ret->tv_nsec < 0)
292 assert (ret->tv_sec > 0);
294 ret->tv_nsec += 1000000000;
301 int check_create_dir (const char *file_orig)
312 int last_is_file = 1;
313 int path_is_absolute = 0;
318 * Sanity checks first
320 if (file_orig == NULL)
323 if ((len = strlen (file_orig)) < 1)
329 * If `file_orig' ends in a slash the last component is a directory,
330 * otherwise it's a file. Act accordingly..
332 if (file_orig[len - 1] == '/')
334 if (file_orig[0] == '/')
335 path_is_absolute = 1;
338 * Create a copy for `strtok_r' to destroy
340 strncpy (file_copy, file_orig, 512);
341 file_copy[511] = '\0';
344 * Break into components. This will eat up several slashes in a row and
345 * remove leading and trailing slashes..
350 while ((fields[fields_num] = strtok_r (ptr, "/", &saveptr)) != NULL)
355 if (fields_num >= 16)
360 * For each component, do..
362 for (i = 0; i < (fields_num - last_is_file); i++)
365 * Do not create directories that start with a dot. This
366 * prevents `../../' attacks and other likely malicious
369 if (fields[i][0] == '.')
371 ERROR ("Cowardly refusing to create a directory that begins with a `.' (dot): `%s'", file_orig);
376 * Join the components together again
379 if (strjoin (dir + path_is_absolute, dir_len - path_is_absolute,
380 fields, i + 1, "/") < 0)
382 ERROR ("strjoin failed: `%s', component #%i", file_orig, i);
386 if (stat (dir, &statbuf) == -1)
390 if (mkdir (dir, 0755) == -1)
393 ERROR ("mkdir (%s): %s", dir,
395 errbuf, sizeof (errbuf)));
402 ERROR ("stat (%s): %s", dir,
403 sstrerror (errno, errbuf,
408 else if (!S_ISDIR (statbuf.st_mode))
410 ERROR ("stat (%s): Not a directory!", dir);
419 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
426 snprintf (ident, 128, "%s,%i,%s", module, instance, name);
429 if (*ksp_ptr == NULL)
431 if ((*ksp_ptr = kstat_lookup (kc, module, instance, name)) == NULL)
433 ERROR ("Cound not find kstat %s", ident);
437 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
439 WARNING ("kstat %s has wrong type", ident);
446 assert (*ksp_ptr != NULL);
447 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
450 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
452 WARNING ("kstat %s could not be read", ident);
456 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
458 WARNING ("kstat %s has wrong type", ident);
465 long long get_kstat_value (kstat_t *ksp, char *name)
468 long long retval = -1LL;
471 assert (ksp != NULL);
472 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
476 fprintf (stderr, "ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
479 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
481 fprintf (stderr, "ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
486 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
489 if (kn->data_type == KSTAT_DATA_INT32)
490 retval = (long long) kn->value.i32;
491 else if (kn->data_type == KSTAT_DATA_UINT32)
492 retval = (long long) kn->value.ui32;
493 else if (kn->data_type == KSTAT_DATA_INT64)
494 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
495 else if (kn->data_type == KSTAT_DATA_UINT64)
496 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
498 WARNING ("get_kstat_value: Not a numeric value: %s", name);
502 #endif /* HAVE_LIBKSTAT */
504 unsigned long long ntohll (unsigned long long n)
506 #if __BYTE_ORDER == __BIG_ENDIAN
509 return (((unsigned long long) ntohl (n)) << 32) + ntohl (n >> 32);
511 } /* unsigned long long ntohll */
513 unsigned long long htonll (unsigned long long n)
515 #if __BYTE_ORDER == __BIG_ENDIAN
518 return (((unsigned long long) htonl (n)) << 32) + htonl (n >> 32);
520 } /* unsigned long long htonll */
522 int format_name (char *ret, int ret_len,
523 const char *hostname,
524 const char *plugin, const char *plugin_instance,
525 const char *type, const char *type_instance)
529 assert (plugin != NULL);
530 assert (type != NULL);
532 if ((plugin_instance == NULL) || (strlen (plugin_instance) == 0))
534 if ((type_instance == NULL) || (strlen (type_instance) == 0))
535 status = snprintf (ret, ret_len, "%s/%s/%s",
536 hostname, plugin, type);
538 status = snprintf (ret, ret_len, "%s/%s/%s-%s",
539 hostname, plugin, type,
544 if ((type_instance == NULL) || (strlen (type_instance) == 0))
545 status = snprintf (ret, ret_len, "%s/%s-%s/%s",
546 hostname, plugin, plugin_instance,
549 status = snprintf (ret, ret_len, "%s/%s-%s/%s-%s",
550 hostname, plugin, plugin_instance,
551 type, type_instance);
554 if ((status < 1) || (status >= ret_len))
557 } /* int format_name */
559 int parse_identifier (char *str, char **ret_host,
560 char **ret_plugin, char **ret_plugin_instance,
561 char **ret_type, char **ret_type_instance)
563 char *hostname = NULL;
565 char *plugin_instance = NULL;
567 char *type_instance = NULL;
570 if (hostname == NULL)
573 plugin = strchr (hostname, '/');
576 *plugin = '\0'; plugin++;
578 type = strchr (plugin, '/');
581 *type = '\0'; type++;
583 plugin_instance = strchr (plugin, '-');
584 if (plugin_instance != NULL)
586 *plugin_instance = '\0';
590 type_instance = strchr (type, '-');
591 if (type_instance != NULL)
593 *type_instance = '\0';
597 *ret_host = hostname;
598 *ret_plugin = plugin;
599 *ret_plugin_instance = plugin_instance;
601 *ret_type_instance = type_instance;
603 } /* int parse_identifier */
605 int parse_values (char *buffer, value_list_t *vl, const data_set_t *ds)
615 while ((ptr = strtok_r (dummy, ":", &saveptr)) != NULL)
619 if (i >= vl->values_len)
624 if (strcmp ("N", ptr) == 0)
625 vl->time = time (NULL);
627 vl->time = (time_t) atoi (ptr);
631 if (strcmp ("U", ptr) == 0)
632 vl->values[i].gauge = NAN;
633 else if (ds->ds[i].type == DS_TYPE_COUNTER)
634 vl->values[i].counter = atoll (ptr);
635 else if (ds->ds[i].type == DS_TYPE_GAUGE)
636 vl->values[i].gauge = atof (ptr);
640 } /* while (strtok_r) */
642 if ((ptr != NULL) || (i != vl->values_len))
645 } /* int parse_values */