2 * collectd - src/common.c
3 * Copyright (C) 2005 Florian octo Forster
5 * This program is free software; you can redistribute it and/
6 * or modify it under the terms of the GNU General Public Li-
7 * cence as published by the Free Software Foundation; either
8 * version 2 of the Licence, or any later version.
10 * This program is distributed in the hope that it will be use-
11 * ful, but WITHOUT ANY WARRANTY; without even the implied war-
12 * ranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 * See the GNU General Public Licence for more details.
15 * You should have received a copy of the GNU General Public
16 * Licence along with this program; if not, write to the Free
17 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
21 * Florian octo Forster <octo at verplant.org>
22 * Niki W. Waibel <niki.waibel@gmx.net>
26 #include "utils_debug.h"
33 extern kstat_ctl_t *kc;
38 static char *rra_def[] =
40 "RRA:AVERAGE:0.0:1:1500",
41 "RRA:AVERAGE:0.2:6:1500",
42 "RRA:AVERAGE:0.1:180:1680",
43 "RRA:AVERAGE:0.1:2160:1520",
46 "RRA:MIN:0.1:180:1680",
47 "RRA:MIN:0.1:2160:1520",
50 "RRA:MAX:0.1:180:1680",
51 "RRA:MAX:0.1:2160:1520",
54 static int rra_num = 12;
57 static int rra_timespans[] =
66 static int rra_timespans_num = 5;
68 static char *rra_types[] =
75 static int rra_types_num = 3;
76 #endif /* HAVE_LIBRRD */
78 void sstrncpy (char *d, const char *s, int len)
84 char *sstrdup (const char *s)
91 if((r = strdup (s)) == NULL)
93 DBG ("Not enough memory.");
100 void *smalloc (size_t size)
104 if ((r = malloc (size)) == NULL)
106 DBG("Not enough memory.");
114 void sfree (void **ptr)
126 int strsplit (char *string, char **fields, size_t size)
133 while ((fields[i] = strtok (ptr, " \t")) != NULL)
145 int strjoin (char *dst, size_t dst_len,
146 char **fields, size_t fields_num,
153 memset (dst, '\0', dst_len);
160 sep_len = strlen (sep);
162 for (i = 0; i < fields_num; i++)
164 if ((i > 0) && (sep_len > 0))
166 if (dst_len <= sep_len)
169 strncat (dst, sep, dst_len);
173 field_len = strlen (fields[i]);
175 if (dst_len <= field_len)
178 strncat (dst, fields[i], dst_len);
179 dst_len -= field_len;
182 return (strlen (dst));
185 int escape_slashes (char *buf, int buf_len)
189 if (strcmp (buf, "/") == 0)
194 strncpy (buf, "root", buf_len);
198 /* Move one to the left */
199 memmove (buf, buf + 1, buf_len - 1);
201 for (i = 0; i < buf_len - 1; i++)
205 else if (buf[i] == '/')
213 int timeval_sub_timespec (struct timeval *tv0, struct timeval *tv1, struct timespec *ret)
215 if ((tv0 == NULL) || (tv1 == NULL) || (ret == NULL))
218 if ((tv0->tv_sec < tv1->tv_sec)
219 || ((tv0->tv_sec == tv1->tv_sec) && (tv0->tv_usec < tv1->tv_usec)))
222 ret->tv_sec = tv0->tv_sec - tv1->tv_sec;
223 ret->tv_nsec = 1000 * ((long) (tv0->tv_usec - tv1->tv_usec));
225 if (ret->tv_nsec < 0)
227 assert (ret->tv_sec > 0);
229 ret->tv_nsec += 1000000000;
237 int check_create_dir (const char *file_orig)
247 int last_is_file = 1;
252 * Sanity checks first
254 if (file_orig == NULL)
257 if ((len = strlen (file_orig)) < 1)
263 * If `file_orig' ends in a slash the last component is a directory,
264 * otherwise it's a file. Act accordingly..
266 if (file_orig[len - 1] == '/')
270 * Create a copy for `strtok' to destroy
272 strncpy (file_copy, file_orig, 512);
273 file_copy[511] = '\0';
276 * Break into components. This will eat up several slashes in a row and
277 * remove leading and trailing slashes..
281 while ((fields[fields_num] = strtok (ptr, "/")) != NULL)
286 if (fields_num >= 16)
291 * For each component, do..
293 for (i = 0; i < (fields_num - last_is_file); i++)
296 * Do not create directories that start with a dot. This
297 * prevents `../../' attacks and other likely malicious
300 if (fields[i][0] == '.')
302 syslog (LOG_ERR, "Cowardly refusing to create a directory that begins with a `.' (dot): `%s'", file_orig);
307 * Join the components together again
309 if (strjoin (dir, dir_len, fields, i + 1, "/") < 0)
311 syslog (LOG_ERR, "strjoin failed: `%s', component #%i", file_orig, i);
315 if (stat (dir, &statbuf) == -1)
319 if (mkdir (dir, 0755) == -1)
321 syslog (LOG_ERR, "mkdir (%s): %s", dir, strerror (errno));
327 syslog (LOG_ERR, "stat (%s): %s", dir, strerror (errno));
331 else if (!S_ISDIR (statbuf.st_mode))
333 syslog (LOG_ERR, "stat (%s): Not a directory!", dir);
344 int rra_get (char ***ret)
346 static char **rra_def = NULL;
347 static int rra_num = 0;
349 int rra_max = rra_timespans_num * rra_types_num;
361 if ((rra_num != 0) && (rra_def != NULL))
367 if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
369 memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
371 step = atoi (COLLECTD_STEP);
372 rows = atoi (COLLECTD_ROWS);
374 if ((step <= 0) || (rows <= 0))
381 for (i = 0; i < rra_timespans_num; i++)
383 span = rra_timespans[i];
385 if ((span / step) < rows)
391 cdp_len = (int) floor (((double) span) / ((double) (rows * step)));
393 cdp_num = (int) ceil (((double) span) / ((double) (cdp_len * step)));
395 for (j = 0; j < rra_types_num; j++)
397 if (rra_num >= rra_max)
400 if (snprintf (buffer, sizeof(buffer), "RRA:%s:%3.1f:%u:%u",
401 rra_types[j], COLLECTD_XFF,
402 cdp_len, cdp_num) >= sizeof (buffer))
404 syslog (LOG_ERR, "rra_get: Buffer would have been truncated.");
408 rra_def[rra_num++] = sstrdup (buffer);
413 DBG ("rra_num = %i", rra_num);
414 for (i = 0; i < rra_num; i++)
415 DBG (" %s", rra_def[i]);
422 int rrd_create_file (char *filename, char **ds_def, int ds_num)
431 if (check_create_dir (filename))
434 if ((rra_num = rra_get (&rra_def)) < 1)
436 syslog (LOG_ERR, "rra_create failed: Could not calculate RRAs");
440 argc = ds_num + rra_num + 4;
442 if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
444 syslog (LOG_ERR, "rrd_create failed: %s", strerror (errno));
451 argv[3] = COLLECTD_STEP;
454 for (i = 0; i < ds_num; i++)
455 argv[j++] = ds_def[i];
456 for (i = 0; i < rra_num; i++)
457 argv[j++] = rra_def[i];
460 optind = 0; /* bug in librrd? */
462 if (rrd_create (argc, argv) == -1)
464 syslog (LOG_ERR, "rrd_create failed: %s: %s", filename, rrd_get_error ());
472 #endif /* HAVE_LIBRRD */
474 int rrd_update_file (char *host, char *file, char *values,
475 char **ds_def, int ds_num)
479 char full_file[1024];
480 char *argv[4] = { "update", full_file, values, NULL };
482 /* host == NULL => local mode */
485 if (snprintf (full_file, 1024, "%s/%s", host, file) >= 1024)
490 if (snprintf (full_file, 1024, "%s", file) >= 1024)
494 if (stat (full_file, &statbuf) == -1)
498 if (rrd_create_file (full_file, ds_def, ds_num))
503 syslog (LOG_ERR, "stat %s: %s", full_file, strerror (errno));
507 else if (!S_ISREG (statbuf.st_mode))
509 syslog (LOG_ERR, "stat %s: Not a regular file!", full_file);
513 optind = 0; /* bug in librrd? */
515 if (rrd_update (3, argv) == -1)
517 syslog (LOG_WARNING, "rrd_update failed: %s: %s", full_file, rrd_get_error ());
520 #endif /* HAVE_LIBRRD */
526 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
533 snprintf (ident, 128, "%s,%i,%s", module, instance, name);
536 if (*ksp_ptr == NULL)
538 if ((*ksp_ptr = kstat_lookup (kc, module, instance, name)) == NULL)
540 syslog (LOG_ERR, "Cound not find kstat %s", ident);
544 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
546 syslog (LOG_WARNING, "kstat %s has wrong type", ident);
553 assert (*ksp_ptr != NULL);
554 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
557 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
559 syslog (LOG_WARNING, "kstat %s could not be read", ident);
563 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
565 syslog (LOG_WARNING, "kstat %s has wrong type", ident);
572 long long get_kstat_value (kstat_t *ksp, char *name)
575 long long retval = -1LL;
578 assert (ksp != NULL);
579 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
583 fprintf (stderr, "ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
586 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
588 fprintf (stderr, "ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
593 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
596 if (kn->data_type == KSTAT_DATA_INT32)
597 retval = (long long) kn->value.i32;
598 else if (kn->data_type == KSTAT_DATA_UINT32)
599 retval = (long long) kn->value.ui32;
600 else if (kn->data_type == KSTAT_DATA_INT64)
601 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
602 else if (kn->data_type == KSTAT_DATA_UINT64)
603 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
605 syslog (LOG_WARNING, "get_kstat_value: Not a numeric value: %s", name);
609 #endif /* HAVE_LIBKSTAT */