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;
37 static char *rra_def[] =
39 "RRA:AVERAGE:0.0:1:1500",
40 "RRA:AVERAGE:0.2:6:1500",
41 "RRA:AVERAGE:0.1:180:1680",
42 "RRA:AVERAGE:0.1:2160:1520",
45 "RRA:MIN:0.1:180:1680",
46 "RRA:MIN:0.1:2160:1520",
49 "RRA:MAX:0.1:180:1680",
50 "RRA:MAX:0.1:2160:1520",
53 static int rra_num = 12;
55 static int rra_timespans[] =
64 static int rra_timespans_num = 5;
66 static char *rra_types[] =
73 static int rra_types_num = 3;
74 #endif /* HAVE_LIBRRD */
76 void sstrncpy (char *d, const char *s, int len)
82 char *sstrdup (const char *s)
89 if((r = strdup (s)) == NULL)
91 DBG ("Not enough memory.");
98 void *smalloc (size_t size)
102 if ((r = malloc (size)) == NULL)
104 DBG("Not enough memory.");
112 void sfree (void **ptr)
124 int strsplit (char *string, char **fields, size_t size)
131 while ((fields[i] = strtok (ptr, " \t")) != NULL)
143 int strjoin (char *dst, size_t dst_len,
144 char **fields, size_t fields_num,
151 memset (dst, '\0', dst_len);
158 sep_len = strlen (sep);
160 for (i = 0; i < fields_num; i++)
162 if ((i > 0) && (sep_len > 0))
164 if (dst_len <= sep_len)
167 strncat (dst, sep, dst_len);
171 field_len = strlen (fields[i]);
173 if (dst_len <= field_len)
176 strncat (dst, fields[i], dst_len);
177 dst_len -= field_len;
180 return (strlen (dst));
183 int escape_slashes (char *buf, int buf_len)
187 if (strcmp (buf, "/") == 0)
192 strncpy (buf, "root", buf_len);
196 /* Move one to the left */
197 memmove (buf, buf + 1, buf_len - 1);
199 for (i = 0; i < buf_len - 1; i++)
203 else if (buf[i] == '/')
212 int check_create_dir (const char *file_orig)
222 int last_is_file = 1;
227 * Sanity checks first
229 if (file_orig == NULL)
232 if ((len = strlen (file_orig)) < 1)
238 * If `file_orig' ends in a slash the last component is a directory,
239 * otherwise it's a file. Act accordingly..
241 if (file_orig[len - 1] == '/')
245 * Create a copy for `strtok' to destroy
247 strncpy (file_copy, file_orig, 512);
248 file_copy[511] = '\0';
251 * Break into components. This will eat up several slashes in a row and
252 * remove leading and trailing slashes..
256 while ((fields[fields_num] = strtok (ptr, "/")) != NULL)
261 if (fields_num >= 16)
266 * For each component, do..
268 for (i = 0; i < (fields_num - last_is_file); i++)
271 * Do not create directories that start with a dot. This
272 * prevents `../../' attacks and other likely malicious
275 if (fields[i][0] == '.')
277 syslog (LOG_ERR, "Cowardly refusing to create a directory that begins with a `.' (dot): `%s'", file_orig);
282 * Join the components together again
284 if (strjoin (dir, dir_len, fields, i + 1, "/") < 0)
286 syslog (LOG_ERR, "strjoin failed: `%s', component #%i", file_orig, i);
290 if (stat (dir, &statbuf) == -1)
294 if (mkdir (dir, 0755) == -1)
296 syslog (LOG_ERR, "mkdir (%s): %s", dir, strerror (errno));
302 syslog (LOG_ERR, "stat (%s): %s", dir, strerror (errno));
306 else if (!S_ISDIR (statbuf.st_mode))
308 syslog (LOG_ERR, "stat (%s): Not a directory!", dir);
319 int rra_get (char ***ret)
321 static char **rra_def = NULL;
322 static int rra_num = 0;
324 int rra_max = rra_timespans_num * rra_types_num;
336 if ((rra_num != 0) && (rra_def != NULL))
342 if ((rra_def = (char **) malloc ((rra_max + 1) * sizeof (char *))) == NULL)
344 memset (rra_def, '\0', (rra_max + 1) * sizeof (char *));
346 step = atoi (COLLECTD_STEP);
347 rows = atoi (COLLECTD_ROWS);
349 if ((step <= 0) || (rows <= 0))
356 for (i = 0; i < rra_timespans_num; i++)
358 span = rra_timespans[i];
360 if ((span / step) < rows)
366 cdp_len = (int) floor (((double) span) / ((double) (rows * step)));
368 cdp_num = (int) ceil (((double) span) / ((double) (cdp_len * step)));
370 for (j = 0; j < rra_types_num; j++)
372 if (rra_num >= rra_max)
375 if (snprintf (buffer, sizeof(buffer), "RRA:%s:%3.1f:%u:%u",
376 rra_types[j], COLLECTD_XFF,
377 cdp_len, cdp_num) >= sizeof (buffer))
379 syslog (LOG_ERR, "rra_get: Buffer would have been truncated.");
383 rra_def[rra_num++] = sstrdup (buffer);
388 DBG ("rra_num = %i", rra_num);
389 for (i = 0; i < rra_num; i++)
390 DBG (" %s", rra_def[i]);
397 int rrd_create_file (char *filename, char **ds_def, int ds_num)
404 if (check_create_dir (filename))
407 rra_get (&argv); /* FIXME */
409 argc = ds_num + rra_num + 4;
411 if ((argv = (char **) malloc (sizeof (char *) * (argc + 1))) == NULL)
413 syslog (LOG_ERR, "rrd_create failed: %s", strerror (errno));
420 argv[3] = COLLECTD_STEP;
423 for (i = 0; i < ds_num; i++)
424 argv[j++] = ds_def[i];
425 for (i = 0; i < rra_num; i++)
426 argv[j++] = rra_def[i];
429 optind = 0; /* bug in librrd? */
431 if (rrd_create (argc, argv) == -1)
433 syslog (LOG_ERR, "rrd_create failed: %s: %s", filename, rrd_get_error ());
441 #endif /* HAVE_LIBRRD */
443 int rrd_update_file (char *host, char *file, char *values,
444 char **ds_def, int ds_num)
448 char full_file[1024];
449 char *argv[4] = { "update", full_file, values, NULL };
451 /* host == NULL => local mode */
454 if (snprintf (full_file, 1024, "%s/%s", host, file) >= 1024)
459 if (snprintf (full_file, 1024, "%s", file) >= 1024)
463 if (stat (full_file, &statbuf) == -1)
467 if (rrd_create_file (full_file, ds_def, ds_num))
472 syslog (LOG_ERR, "stat %s: %s", full_file, strerror (errno));
476 else if (!S_ISREG (statbuf.st_mode))
478 syslog (LOG_ERR, "stat %s: Not a regular file!", full_file);
482 optind = 0; /* bug in librrd? */
484 if (rrd_update (3, argv) == -1)
486 syslog (LOG_WARNING, "rrd_update failed: %s: %s", full_file, rrd_get_error ());
489 #endif /* HAVE_LIBRRD */
495 int get_kstat (kstat_t **ksp_ptr, char *module, int instance, char *name)
502 snprintf (ident, 128, "%s,%i,%s", module, instance, name);
505 if (*ksp_ptr == NULL)
507 if ((*ksp_ptr = kstat_lookup (kc, module, instance, name)) == NULL)
509 syslog (LOG_ERR, "Cound not find kstat %s", ident);
513 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
515 syslog (LOG_WARNING, "kstat %s has wrong type", ident);
522 assert (*ksp_ptr != NULL);
523 assert ((*ksp_ptr)->ks_type == KSTAT_TYPE_NAMED);
526 if (kstat_read (kc, *ksp_ptr, NULL) == -1)
528 syslog (LOG_WARNING, "kstat %s could not be read", ident);
532 if ((*ksp_ptr)->ks_type != KSTAT_TYPE_NAMED)
534 syslog (LOG_WARNING, "kstat %s has wrong type", ident);
541 long long get_kstat_value (kstat_t *ksp, char *name)
544 long long retval = -1LL;
547 assert (ksp != NULL);
548 assert (ksp->ks_type == KSTAT_TYPE_NAMED);
552 fprintf (stderr, "ERROR: %s:%i: ksp == NULL\n", __FILE__, __LINE__);
555 else if (ksp->ks_type != KSTAT_TYPE_NAMED)
557 fprintf (stderr, "ERROR: %s:%i: ksp->ks_type != KSTAT_TYPE_NAMED\n", __FILE__, __LINE__);
562 if ((kn = (kstat_named_t *) kstat_data_lookup (ksp, name)) == NULL)
565 if (kn->data_type == KSTAT_DATA_INT32)
566 retval = (long long) kn->value.i32;
567 else if (kn->data_type == KSTAT_DATA_UINT32)
568 retval = (long long) kn->value.ui32;
569 else if (kn->data_type == KSTAT_DATA_INT64)
570 retval = (long long) kn->value.i64; /* According to ANSI C99 `long long' must hold at least 64 bits */
571 else if (kn->data_type == KSTAT_DATA_UINT64)
572 retval = (long long) kn->value.ui64; /* XXX: Might overflow! */
574 syslog (LOG_WARNING, "get_kstat_value: Not a numeric value: %s", name);
578 #endif /* HAVE_LIBKSTAT */