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- /* $Id: sm_sensor.c,v 1.7 2005/10/18 19:58:11 dijkstra Exp $ */
- /*
- * Copyright (c) 2001-2005 Willem Dijkstra
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
- * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
- * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
- * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
- * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- *
- */
- /*
- * Get sensor data from the kernel and return in symon_buf as
- *
- * num : value
- *
- */
- #include "conf.h"
- #include <sys/param.h>
- #include <sys/sysctl.h>
- #include <errno.h>
- #include <limits.h>
- #include <stdlib.h>
- #include <string.h>
- #include "error.h"
- #include "symon.h"
- #ifndef HAS_SENSORS_H
- void
- privinit_sensor()
- {
- fatal("sensor support not available");
- }
- void
- init_sensor(struct stream *st)
- {
- fatal("sensor support not available");
- }
- int
- get_sensor(char *symon_buf, int maxlen, struct stream *st)
- {
- fatal("sensor support not available");
- return 0;
- }
- #else
- #include <sys/sensors.h>
- /* Globals for this module start with sn_ */
- static int sn_mib[] = {CTL_HW, HW_SENSORS, 0};
- static struct sensor sn_sensor;
- void
- privinit_sensor()
- {
- /* EMPTY */
- }
- void
- init_sensor(struct stream *st)
- {
- long l = strtol(st->arg, NULL, 10);
- st->parg.sn = (int) (l & SYMON_SENSORMASK);
- info("started module sensors(%.200s)", st->arg);
- }
- int
- get_sensor(char *symon_buf, int maxlen, struct stream *st)
- {
- size_t len;
- double t;
- bzero((void *) &sn_sensor, sizeof(sn_sensor));
- sn_mib[2] = st->parg.sn;
- len = sizeof(sn_sensor);
- if (sysctl(sn_mib, 3, &sn_sensor, &len, NULL, 0) == -1) {
- warning("%s:%d: sensor can't get sensor %.200s -- %.200s",
- __FILE__, __LINE__, st->arg, strerror(errno));
- return 0;
- } else {
- switch (sn_sensor.type) {
- case SENSOR_TEMP:
- t = (double) (sn_sensor.value / 1000.0 / 1000.0) - 273.16;
- break;
- case SENSOR_FANRPM:
- t = (double) sn_sensor.value;
- break;
- case SENSOR_VOLTS_DC:
- t = (double) (sn_sensor.value / 1000.0 / 1000.0);
- break;
- default:
- t = (double) sn_sensor.value;
- }
- return snpack(symon_buf, maxlen, st->arg, MT_SENSOR, t);
- }
- }
- #endif /* HAS_SENSORS_H */
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