root/lm-sensors/branches/lm-sensors-3.0.0/prog/sensord/rrd.c @ 4817

Revision 4817, 11.5 KB (checked in by khali, 7 years ago)

Add generic chip support to sensord, much like sensors has.
Alarm and beep mask support is still missing.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
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1/*
2 * sensord
3 *
4 * A daemon that periodically logs sensor information to syslog.
5 *
6 * Copyright (c) 1999-2002 Merlin Hughes <merlin@merlin.org>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or
11 * (at your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 */
22
23/*
24 * RRD is the Round Robin Database
25 *
26 * Get this package from:
27 *   http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/
28 *
29 * For compilation you need the development libraries;
30 * for execution you need the runtime libraries; for
31 * Web-based graph access you need the binary rrdtool.
32 */
33
34#include <errno.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <string.h>
38#include <syslog.h>
39#include <unistd.h>
40#include <sys/stat.h>
41#include <sys/types.h>
42
43#include <getopt.h>
44#include <rrd.h>
45
46#include "sensord.h"
47#include "lib/error.h"
48
49#define DO_READ 0
50#define DO_SCAN 1
51#define DO_SET 2
52#define DO_RRD 3
53
54/* one integer */
55#define STEP_BUFF 64
56/* RRA:AVERAGE:0.5:1:12345 */
57#define RRA_BUFF 256
58/* weak: max sensors for RRD .. TODO: fix */
59#define MAX_RRD_SENSORS 256
60/* weak: max raw label length .. TODO: fix */
61#define RAW_LABEL_LENGTH 32
62/* DS:label:GAUGE:900:U:U | :3000 .. TODO: fix */
63#define RRD_BUFF 64
64
65char rrdBuff[MAX_RRD_SENSORS * RRD_BUFF + 1];
66static char rrdLabels[MAX_RRD_SENSORS][RAW_LABEL_LENGTH + 1];
67
68#define LOADAVG "loadavg"
69#define LOAD_AVERAGE "Load Average"
70
71typedef int (*FeatureFN) (void *data, const char *rawLabel, const char *label, const FeatureDescriptor *feature);
72
73static char
74rrdNextChar
75(char c) {
76  if (c == '9') {
77    return 'A';
78  } else if (c == 'Z') {
79    return 'a';
80  } else if (c == 'z') {
81    return 0;
82  } else {
83    return c + 1;
84  }
85}
86
87static void
88rrdCheckLabel
89(const char *rawLabel, int index0) {
90  char *buffer = rrdLabels[index0];
91  int i, j, okay;
92 
93  i = 0;
94  while ((i < RAW_LABEL_LENGTH) && rawLabel[i]) { /* contrain raw label to [A-Za-z0-9_] */
95    char c = rawLabel[i];
96    if (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z')) || ((c >= '0') && (c <= '9')) || (c == '_')) {
97      buffer[i] = c;
98    } else {
99      buffer[i] = '_';
100    }
101    ++ i;
102  }
103  buffer[i] = '\0';
104
105  j = 0;
106  okay = (i > 0);
107  while (okay && (j < index0)) /* locate duplicates */
108    okay = strcmp (rrdLabels[j ++], buffer);
109
110  while (!okay) { /* uniquify duplicate labels with _? or _?? */
111    if (!buffer[i]) {
112      if (i > RAW_LABEL_LENGTH - 3)
113        i = RAW_LABEL_LENGTH - 3;
114      buffer[i] = '_';
115      buffer[i + 1] = '0';
116      buffer[i + 2] = '\0';
117    } else if (!buffer[i + 2]) {
118      if (!(buffer[i + 1] = rrdNextChar (buffer[i + 1]))) {
119        buffer[i + 1] = '0';
120        buffer[i + 2] = '0';
121        buffer[i + 3] = '\0';
122      }
123    } else {
124      if (!(buffer[i + 2] = rrdNextChar (buffer[i + 2]))) {
125        buffer[i + 1] = rrdNextChar (buffer[i + 1]);
126        buffer[i + 2] = '0';
127      }
128    }
129    j = 0;
130    okay = 1;
131    while (okay && (j < index0))
132      okay = strcmp (rrdLabels[j ++], buffer);
133  }
134}
135
136static int
137applyToFeatures
138(FeatureFN fn, void *data) {
139  const sensors_chip_name *chip;
140  int i = 0, j, ret = 0, num = 0;
141
142  for (j = 0; (ret == 0) && (j < numChipNames); ++ j) {
143    while ((ret == 0) && ((chip = sensors_get_detected_chips (&chipNames[j], &i)) != NULL)) {
144      ChipDescriptor *descriptor;
145      descriptor = generateChipDescriptor (chip);
146      if (descriptor) {
147        const FeatureDescriptor *features = descriptor->features;
148        int index0;
149
150        for (index0 = 0; (ret == 0) && (num < MAX_RRD_SENSORS) && features[index0].format; ++ index0) {
151          const FeatureDescriptor *feature = features + index0;
152          int labelNumber = feature->dataNumbers[0];
153          const char *rawLabel = NULL;
154          char *label = NULL;
155
156          if (getRawLabel (chip, labelNumber, &rawLabel)) {
157            sensorLog (LOG_ERR, "Error getting raw sensor label: %s/#%d", chip->prefix, labelNumber);
158            ret = -1;
159          } else if (!(label = sensors_get_label (chip, labelNumber))) {
160            sensorLog (LOG_ERR, "Error getting sensor label: %s/#%d", chip->prefix, labelNumber);
161            ret = -1;
162          } else  {
163            rrdCheckLabel (rawLabel, num);
164            ret = fn (data, rrdLabels[num], label, feature);
165            ++ num;
166          }
167          if (label)
168            free (label);
169        }
170        free (descriptor->features);
171        free (descriptor);
172      }
173    }
174  }
175
176  return ret;
177}
178
179struct ds {
180  int num;
181  const char **argv;
182};
183
184static int
185rrdGetSensors_DS
186(void *_data, const char *rawLabel, const char *label, const FeatureDescriptor *feature) {
187  if (!feature || feature->rrd) {
188    struct ds *data = (struct ds *) _data;
189    char *ptr = rrdBuff + data->num * RRD_BUFF;
190    const char *min, *max;
191    data->argv[data->num ++] = ptr;
192    switch (feature ? feature->type : DataType_other) { /* arbitrary sanity limits */
193      case DataType_voltage:
194        min="-25";
195        max="25";
196        break;
197      case DataType_rpm:
198        min = "0";
199        max = "12000";
200        break;
201      case DataType_temperature:
202        min = "0";
203        max = "250";
204        break;
205      default:
206        min = max = "U";
207        break;
208    }
209    sprintf (ptr, "DS:%s:GAUGE:%d:%s:%s", rawLabel, /* number of seconds downtime during which average be used instead of unknown */ 5 * rrdTime, min, max);
210  }
211  return 0;
212}
213
214static int
215rrdGetSensors
216(const char **argv) {
217  int ret = 0;
218  struct ds data = { 0, argv};
219  ret = applyToFeatures (rrdGetSensors_DS, &data);
220  if (!ret && doLoad)
221    ret = rrdGetSensors_DS (&data, LOADAVG, LOAD_AVERAGE, NULL);
222  return ret ? -1 : data.num;
223}
224
225int
226rrdInit
227(void) {
228  int ret = 0;
229  struct stat tmp;
230 
231  sensorLog (LOG_DEBUG, "sensor RRD init"); 
232  if (stat (rrdFile, &tmp)) {
233    if (errno == ENOENT) {
234      char stepBuff[STEP_BUFF], rraBuff[RRA_BUFF];
235      int argc = 4, num;
236      const char *argv[6 + MAX_RRD_SENSORS] = {
237        "sensord", rrdFile, "-s", stepBuff
238      };
239     
240      sensorLog (LOG_INFO, "creating round robin database");
241      num = rrdGetSensors (argv + argc);
242      if (num == 0) {
243        sensorLog (LOG_ERR, "Error creating RRD: %s: %s", rrdFile, "No sensors detected");
244        ret = 2;
245      } else if (num < 0) {
246        ret = -num;
247      } else {
248        sprintf (stepBuff, "%d", rrdTime);
249        sprintf (rraBuff, "RRA:%s:%f:%d:%d", rrdNoAverage?"LAST":"AVERAGE", 0.5 /* fraction of non-unknown samples needed per entry */, 1 /* samples per entry */, 7 * 24 * 60 * 60 / rrdTime /* 1 week */);
250        argc += num;
251        argv[argc ++] = rraBuff;
252        argv[argc] = NULL;
253        optind = 1;
254        opterr = 0;
255        optopt = '?';
256        optarg = NULL;
257        if ((ret = rrd_create (argc, (char **) /* WEAK */ argv))) {
258          sensorLog (LOG_ERR, "Error creating RRD file: %s: %s", rrdFile, rrd_get_error ());
259        }
260      }
261    } else {
262      sensorLog (LOG_ERR, "Error stat()ing RRD: %s: %s", rrdFile, strerror (errno));
263      ret = 1;
264    }
265  }
266  sensorLog (LOG_DEBUG, "sensor RRD inited"); 
267 
268  return ret;
269}
270
271#define RRDCGI "/usr/bin/rrdcgi"
272#define WWWDIR "/sensord"
273
274struct gr {
275  DataType type;
276  const char *h2;
277  const char *image;
278  const char *title;
279  const char *axisTitle;
280  const char *axisDefn;
281  const char *options;
282  int loadAvg;
283};
284
285static int
286rrdCGI_DEF
287(void *_data, const char *rawLabel, const char *label, const FeatureDescriptor *feature) {
288  struct gr *data = (struct gr *) _data;
289  if (!feature || (feature->rrd && (feature->type == data->type)))
290    printf ("\n\tDEF:%s=%s:%s:AVERAGE", rawLabel, rrdFile, rawLabel);
291  return 0;
292}
293
294static int
295rrdCGI_LINE
296(void *_data, const char *rawLabel, const char *label, const FeatureDescriptor *feature) {
297  struct gr *data = (struct gr *) _data;
298  if (!feature || (feature->rrd && (feature->type == data->type)))
299    printf ("\n\tLINE2:%s#%.6x:\"%s\"", rawLabel, (int) random () & 0xffffff, label);
300  return 0;
301}
302
303static struct gr graphs[] = {
304  {
305    DataType_temperature,
306    "Daily Temperature Summary",
307    "daily-temperature",
308    "Temperature",
309    "Temperature (C)",
310    "HOUR:1:HOUR:3:HOUR:3:0:%b %d %H:00",
311    "-s -1d -l 0",
312    1
313  }, {
314    DataType_rpm,
315    "Daily Fan Speed Summary",
316    "daily-rpm",
317    "Fan Speed",
318    "Speed (RPM)",
319    "HOUR:1:HOUR:3:HOUR:3:0:%b %d %H:00",
320    "-s -1d -l 0",
321    0
322  }, {
323    DataType_voltage,
324    "Daily Voltage Summary",
325    "daily-voltage",
326    "Power Supply",
327    "Voltage (V)",
328    "HOUR:1:HOUR:3:HOUR:3:0:%b %d %H:00",
329    "-s -1d --alt-autoscale",
330    0
331  }, {
332    DataType_temperature,
333    "Weekly Temperature Summary",
334    "weekly-temperature",
335    "Temperature",
336    "Temperature (C)",
337    "HOUR:6:DAY:1:DAY:1:86400:%a %b %d",
338    "-s -1w -l 0",
339    1
340  }, {
341    DataType_rpm,
342    "Weekly Fan Speed Summary",
343    "weekly-rpm",
344    "Fan Speed",
345    "Speed (RPM)",
346    "HOUR:6:DAY:1:DAY:1:86400:%a %b %d",
347    "-s -1w -l 0",
348    0
349  }, {
350    DataType_voltage,
351    "Weekly Voltage Summary",
352    "weekly-voltage",
353    "Power Supply",
354    "Voltage (V)",
355    "HOUR:6:DAY:1:DAY:1:86400:%a %b %d",
356    "-s -1w --alt-autoscale",
357    0
358  }, {
359    DataType_other,
360    NULL,
361    NULL,
362    NULL,
363    NULL,
364    NULL,
365    NULL,
366    0
367  } 
368};
369
370int
371rrdUpdate
372(void) {
373  int ret = rrdChips ();
374  if (!ret && doLoad) {
375    FILE *loadavg;
376    if (!(loadavg = fopen ("/proc/loadavg", "r"))) {
377      sensorLog (LOG_ERR, "Error opening `/proc/loadavg': %s", strerror (errno));
378      ret = 1;
379    } else {
380      float value;
381      if (fscanf (loadavg, "%f", &value) != 1) {
382        sensorLog (LOG_ERR, "Error reading load average");
383        ret = 2;
384      } else {
385        sprintf (rrdBuff + strlen (rrdBuff), ":%f", value);
386      }
387      fclose (loadavg);
388    }
389  }
390  if (!ret) {
391    const char *argv[] = {
392      "sensord", rrdFile, rrdBuff, NULL
393    };
394    optind = 1;
395    opterr = 0;
396    optopt = '?';
397    optarg = NULL;
398    if ((ret = rrd_update (3, (char **) /* WEAK */ argv))) {
399      sensorLog (LOG_ERR, "Error updating RRD file: %s: %s", rrdFile, rrd_get_error ());
400    }
401  }
402  sensorLog (LOG_DEBUG, "sensor rrd updated"); 
403 
404  return ret;
405}
406
407int
408rrdCGI
409(void) {
410  int ret = 0;
411  struct gr *graph = graphs;
412
413  printf ("#!" RRDCGI "\n\n<HTML>\n<HEAD>\n<TITLE>sensord</TITLE>\n</HEAD>\n<BODY>\n<H1>sensord</H1>\n");
414  while (graph->type != DataType_other) {
415    printf ("<H2>%s</H2>\n", graph->h2);
416    printf ("<P>\n<RRD::GRAPH %s/%s.png\n\t--imginfo '<IMG SRC=" WWWDIR "/%%s WIDTH=%%lu HEIGHT=%%lu>'\n\t-a PNG\n\t-h 200 -w 800\n", cgiDir, graph->image);
417    printf ("\t--lazy\n\t-v '%s'\n\t-t '%s'\n\t-x '%s'\n\t%s", graph->axisTitle, graph->title, graph->axisDefn, graph->options);
418    if (!ret)
419      ret = applyToFeatures (rrdCGI_DEF, graph);
420    if (!ret && doLoad && graph->loadAvg)
421      ret = rrdCGI_DEF (graph, LOADAVG, LOAD_AVERAGE, NULL);
422    if (!ret)
423      ret = applyToFeatures (rrdCGI_LINE, graph);
424    if (!ret && doLoad && graph->loadAvg)
425      ret = rrdCGI_LINE (graph, LOADAVG, LOAD_AVERAGE, NULL);
426    printf (">\n</P>\n");
427    ++ graph;
428  }
429  printf ("<p>\n<small><b>sensord</b> by <a href=\"mailto:merlin@merlin.org\">Merlin Hughes</a>, all credit to the <a href=\"http://www.lm-sensors.org/\">lm_sensors</a> crew.</small>\n</p>\n");
430  printf ("</BODY>\n</HTML>\n");
431 
432  return ret;
433}
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