root/lm-sensors/branches/lm-sensors-3.0.0/prog/sensord/rrd.c @ 5252

Revision 5252, 12.2 KB (checked in by khali, 7 years ago)

Fix support of multiple chip names on the command line. It got broken
accidentally during the conversion to the new libsensors API in version
3.0.0. This closes ticket #2321.

  • 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., 51 Franklin Street, Fifth Floor, Boston,
21 * MA 02110-1301 USA.
22 */
23
24/*
25 * RRD is the Round Robin Database
26 *
27 * Get this package from:
28 *   http://people.ee.ethz.ch/~oetiker/webtools/rrdtool/
29 *
30 * For compilation you need the development libraries;
31 * for execution you need the runtime libraries; for
32 * Web-based graph access you need the binary rrdtool.
33 */
34
35#include <errno.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <syslog.h>
40#include <unistd.h>
41#include <sys/stat.h>
42#include <sys/types.h>
43
44#include <rrd.h>
45
46#include "sensord.h"
47
48#define DO_READ 0
49#define DO_SCAN 1
50#define DO_SET 2
51#define DO_RRD 3
52
53/* one integer */
54#define STEP_BUFF 64
55/* RRA:AVERAGE:0.5:1:12345 */
56#define RRA_BUFF 256
57/* weak: max sensors for RRD .. TODO: fix */
58#define MAX_RRD_SENSORS 256
59/* weak: max raw label length .. TODO: fix */
60#define RAW_LABEL_LENGTH 32
61/* DS:label:GAUGE:900:U:U | :3000 .. TODO: fix */
62#define RRD_BUFF 64
63
64char rrdBuff[MAX_RRD_SENSORS * RRD_BUFF + 1];
65static char rrdLabels[MAX_RRD_SENSORS][RAW_LABEL_LENGTH + 1];
66
67#define LOADAVG "loadavg"
68#define LOAD_AVERAGE "Load Average"
69
70typedef int (*FeatureFN) (void *data, const char *rawLabel, const char *label, const FeatureDescriptor *feature);
71
72static char
73rrdNextChar
74(char c) {
75  if (c == '9') {
76    return 'A';
77  } else if (c == 'Z') {
78    return 'a';
79  } else if (c == 'z') {
80    return 0;
81  } else {
82    return c + 1;
83  }
84}
85
86static void
87rrdCheckLabel
88(const char *rawLabel, int index0) {
89  char *buffer = rrdLabels[index0];
90  int i, j, okay;
91 
92  i = 0;
93  while ((i < RAW_LABEL_LENGTH) && rawLabel[i]) { /* contrain raw label to [A-Za-z0-9_] */
94    char c = rawLabel[i];
95    if (((c >= 'A') && (c <= 'Z')) || ((c >= 'a') && (c <= 'z')) || ((c >= '0') && (c <= '9')) || (c == '_')) {
96      buffer[i] = c;
97    } else {
98      buffer[i] = '_';
99    }
100    ++ i;
101  }
102  buffer[i] = '\0';
103
104  j = 0;
105  okay = (i > 0);
106  while (okay && (j < index0)) /* locate duplicates */
107    okay = strcmp (rrdLabels[j ++], buffer);
108
109  while (!okay) { /* uniquify duplicate labels with _? or _?? */
110    if (!buffer[i]) {
111      if (i > RAW_LABEL_LENGTH - 3)
112        i = RAW_LABEL_LENGTH - 3;
113      buffer[i] = '_';
114      buffer[i + 1] = '0';
115      buffer[i + 2] = '\0';
116    } else if (!buffer[i + 2]) {
117      if (!(buffer[i + 1] = rrdNextChar (buffer[i + 1]))) {
118        buffer[i + 1] = '0';
119        buffer[i + 2] = '0';
120        buffer[i + 3] = '\0';
121      }
122    } else {
123      if (!(buffer[i + 2] = rrdNextChar (buffer[i + 2]))) {
124        buffer[i + 1] = rrdNextChar (buffer[i + 1]);
125        buffer[i + 2] = '0';
126      }
127    }
128    j = 0;
129    okay = 1;
130    while (okay && (j < index0))
131      okay = strcmp (rrdLabels[j ++], buffer);
132  }
133}
134
135static int
136applyToFeatures
137(FeatureFN fn, void *data) {
138  const sensors_chip_name *chip;
139  int i, j, ret = 0, num = 0;
140
141  for (j = 0; (ret == 0) && (j < numChipNames); ++ j) {
142    i = 0;
143    while ((ret == 0) && ((chip = sensors_get_detected_chips (&chipNames[j], &i)) != NULL)) {
144      int index0, chipindex = -1;
145      for (index0 = 0; knownChips[index0].features; ++ index0)
146        /* Trick: we compare addresses here. We know it works because both
147           pointers were returned by sensors_get_detected_chips(), so they
148           refer to libsensors internal structures, which do not move. */
149        if (knownChips[index0].name == chip) {
150          chipindex = index0;
151          break;
152        }
153      if (chipindex >= 0) {
154        const ChipDescriptor *descriptor = &knownChips[chipindex];
155        const FeatureDescriptor *features = descriptor->features;
156
157        for (index0 = 0; (ret == 0) && (num < MAX_RRD_SENSORS) && features[index0].format; ++ index0) {
158          const FeatureDescriptor *feature = features + index0;
159          const char *rawLabel = feature->feature->name;
160          char *label = NULL;
161
162          if (!(label = sensors_get_label (chip, feature->feature))) {
163            sensorLog (LOG_ERR, "Error getting sensor label: %s/%s", chip->prefix, rawLabel);
164            ret = -1;
165          } else  {
166            rrdCheckLabel (rawLabel, num);
167            ret = fn (data, rrdLabels[num], label, feature);
168            ++ num;
169          }
170          if (label)
171            free (label);
172        }
173      }
174    }
175  }
176
177  return ret;
178}
179
180struct ds {
181  int num;
182  const char **argv;
183};
184
185static int
186rrdGetSensors_DS
187(void *_data, const char *rawLabel, const char *label, const FeatureDescriptor *feature) {
188  (void) label; /* no warning */
189  if (!feature || feature->rrd) {
190    struct ds *data = (struct ds *) _data;
191    char *ptr = rrdBuff + data->num * RRD_BUFF;
192    const char *min, *max;
193    data->argv[data->num ++] = ptr;
194    switch (feature ? feature->type : DataType_other) { /* arbitrary sanity limits */
195      case DataType_voltage:
196        min="-25";
197        max="25";
198        break;
199      case DataType_rpm:
200        min = "0";
201        max = "12000";
202        break;
203      case DataType_temperature:
204        min = "0";
205        max = "250";
206        break;
207      default:
208        min = max = "U";
209        break;
210    }
211    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);
212  }
213  return 0;
214}
215
216static int
217rrdGetSensors
218(const char **argv) {
219  int ret = 0;
220  struct ds data = { 0, argv};
221  ret = applyToFeatures (rrdGetSensors_DS, &data);
222  if (!ret && doLoad)
223    ret = rrdGetSensors_DS (&data, LOADAVG, LOAD_AVERAGE, NULL);
224  return ret ? -1 : data.num;
225}
226
227int
228rrdInit
229(void) {
230  int ret = 0;
231  struct stat tmp;
232 
233  sensorLog (LOG_DEBUG, "sensor RRD init"); 
234  if (stat (rrdFile, &tmp)) {
235    if (errno == ENOENT) {
236      char stepBuff[STEP_BUFF], rraBuff[RRA_BUFF];
237      int argc = 4, num;
238      const char *argv[6 + MAX_RRD_SENSORS] = {
239        "sensord", rrdFile, "-s", stepBuff
240      };
241     
242      sensorLog (LOG_INFO, "creating round robin database");
243      num = rrdGetSensors (argv + argc);
244      if (num == 0) {
245        sensorLog (LOG_ERR, "Error creating RRD: %s: %s", rrdFile, "No sensors detected");
246        ret = 2;
247      } else if (num < 0) {
248        ret = -num;
249      } else {
250        sprintf (stepBuff, "%d", rrdTime);
251        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 */);
252        argc += num;
253        argv[argc ++] = rraBuff;
254        argv[argc] = NULL;
255        if ((ret = rrd_create (argc, (char **) /* WEAK */ argv))) {
256          sensorLog (LOG_ERR, "Error creating RRD file: %s: %s", rrdFile, rrd_get_error ());
257        }
258      }
259    } else {
260      sensorLog (LOG_ERR, "Error stat()ing RRD: %s: %s", rrdFile, strerror (errno));
261      ret = 1;
262    }
263  }
264  sensorLog (LOG_DEBUG, "sensor RRD inited"); 
265 
266  return ret;
267}
268
269#define RRDCGI "/usr/bin/rrdcgi"
270#define WWWDIR "/sensord"
271
272struct gr {
273  DataType type;
274  const char *h2;
275  const char *image;
276  const char *title;
277  const char *axisTitle;
278  const char *axisDefn;
279  const char *options;
280  int loadAvg;
281};
282
283static int
284rrdCGI_DEF
285(void *_data, const char *rawLabel, const char *label, const FeatureDescriptor *feature) {
286  struct gr *data = (struct gr *) _data;
287  (void) label; /* no warning */
288  if (!feature || (feature->rrd && (feature->type == data->type)))
289    printf ("\n\tDEF:%s=%s:%s:AVERAGE", rawLabel, rrdFile, rawLabel);
290  return 0;
291}
292
293/* Compute an arbitrary color based on the sensor label. This is preferred
294   over a random value because this guarantees that daily and weekly charts
295   will use the same colors. */
296static int
297rrdCGI_color
298(const char *label) {
299  unsigned long color = 0, brightness;
300  const char *c;
301
302  for (c = label; *c; c++) {
303    color = (color << 6) + (color >> (*c & 7));
304    color ^= (*c) * 0x401;
305  }
306  color &= 0xffffff;
307  /* Adjust very light colors */
308  brightness = (color & 0xff) + ((color >> 8) & 0xff) + (color >> 16);
309  if (brightness > 672)
310    color &= 0x7f7f7f;
311  /* Adjust very dark colors */
312  else if (brightness < 96)
313    color |= 0x808080;
314  return color;
315}
316
317static int
318rrdCGI_LINE
319(void *_data, const char *rawLabel, const char *label, const FeatureDescriptor *feature) {
320  struct gr *data = (struct gr *) _data;
321  if (!feature || (feature->rrd && (feature->type == data->type)))
322    printf ("\n\tLINE2:%s#%.6x:\"%s\"", rawLabel, rrdCGI_color(label), label);
323  return 0;
324}
325
326static struct gr graphs[] = {
327  {
328    DataType_temperature,
329    "Daily Temperature Summary",
330    "daily-temperature",
331    "Temperature",
332    "Temperature (C)",
333    "HOUR:1:HOUR:3:HOUR:3:0:%b %d %H:00",
334    "-s -1d -l 0",
335    1
336  }, {
337    DataType_rpm,
338    "Daily Fan Speed Summary",
339    "daily-rpm",
340    "Fan Speed",
341    "Speed (RPM)",
342    "HOUR:1:HOUR:3:HOUR:3:0:%b %d %H:00",
343    "-s -1d -l 0",
344    0
345  }, {
346    DataType_voltage,
347    "Daily Voltage Summary",
348    "daily-voltage",
349    "Power Supply",
350    "Voltage (V)",
351    "HOUR:1:HOUR:3:HOUR:3:0:%b %d %H:00",
352    "-s -1d --alt-autoscale",
353    0
354  }, {
355    DataType_temperature,
356    "Weekly Temperature Summary",
357    "weekly-temperature",
358    "Temperature",
359    "Temperature (C)",
360    "HOUR:6:DAY:1:DAY:1:86400:%a %b %d",
361    "-s -1w -l 0",
362    1
363  }, {
364    DataType_rpm,
365    "Weekly Fan Speed Summary",
366    "weekly-rpm",
367    "Fan Speed",
368    "Speed (RPM)",
369    "HOUR:6:DAY:1:DAY:1:86400:%a %b %d",
370    "-s -1w -l 0",
371    0
372  }, {
373    DataType_voltage,
374    "Weekly Voltage Summary",
375    "weekly-voltage",
376    "Power Supply",
377    "Voltage (V)",
378    "HOUR:6:DAY:1:DAY:1:86400:%a %b %d",
379    "-s -1w --alt-autoscale",
380    0
381  }, {
382    DataType_other,
383    NULL,
384    NULL,
385    NULL,
386    NULL,
387    NULL,
388    NULL,
389    0
390  } 
391};
392
393int
394rrdUpdate
395(void) {
396  int ret = rrdChips ();
397  if (!ret && doLoad) {
398    FILE *loadavg;
399    if (!(loadavg = fopen ("/proc/loadavg", "r"))) {
400      sensorLog (LOG_ERR, "Error opening `/proc/loadavg': %s", strerror (errno));
401      ret = 1;
402    } else {
403      float value;
404      if (fscanf (loadavg, "%f", &value) != 1) {
405        sensorLog (LOG_ERR, "Error reading load average");
406        ret = 2;
407      } else {
408        sprintf (rrdBuff + strlen (rrdBuff), ":%f", value);
409      }
410      fclose (loadavg);
411    }
412  }
413  if (!ret) {
414    const char *argv[] = {
415      "sensord", rrdFile, rrdBuff, NULL
416    };
417    if ((ret = rrd_update (3, (char **) /* WEAK */ argv))) {
418      sensorLog (LOG_ERR, "Error updating RRD file: %s: %s", rrdFile, rrd_get_error ());
419    }
420  }
421  sensorLog (LOG_DEBUG, "sensor rrd updated"); 
422 
423  return ret;
424}
425
426int
427rrdCGI
428(void) {
429  int ret = 0;
430  struct gr *graph = graphs;
431
432  printf ("#!" RRDCGI "\n\n<HTML>\n<HEAD>\n<TITLE>sensord</TITLE>\n</HEAD>\n<BODY>\n<H1>sensord</H1>\n");
433  while (graph->type != DataType_other) {
434    printf ("<H2>%s</H2>\n", graph->h2);
435    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);
436    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);
437    if (!ret)
438      ret = applyToFeatures (rrdCGI_DEF, graph);
439    if (!ret && doLoad && graph->loadAvg)
440      ret = rrdCGI_DEF (graph, LOADAVG, LOAD_AVERAGE, NULL);
441    if (!ret)
442      ret = applyToFeatures (rrdCGI_LINE, graph);
443    if (!ret && doLoad && graph->loadAvg)
444      ret = rrdCGI_LINE (graph, LOADAVG, LOAD_AVERAGE, NULL);
445    printf (">\n</P>\n");
446    ++ graph;
447  }
448  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");
449  printf ("</BODY>\n</HTML>\n");
450 
451  return ret;
452}
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