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/*
* Roomtemp PMDA
*
* Copyright (c) 2000-2002 Silicon Graphics, Inc. All Rights Reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "pmapi.h"
#include "impl.h"
#include "pmda.h"
#include "domain.h"
#include "dsread.h"
/*
* Roomtemp PMDA
*
* This PMDA exports the temperature from one or more sensors built using
* the DS2480 and DS1280 chipsets and MicroLAN technology from Dallas
* Semiconductor Corporation.
*/
/*
* Serial device
*/
static char *tty;
/*
* list of instances
*/
static pmdaInstid *device = NULL;
/*
* list of instance domains
*/
static pmdaIndom indomtab[] = {
#define DEVICE 0
{ DEVICE, 0, NULL },
};
typedef struct {
unsigned char sn[8];
} sn_t;
sn_t *sntab = NULL;
/*
* All metrics supported in this PMDA - one table entry for each.
* The 4th field specifies the serial number of the instance domain
* for the metric, and must be either PM_INDOM_NULL (denoting a
* metric that only ever has a single value), or the serial number
* of one of the instance domains declared in the instance domain table
* (i.e. in indomtab, above).
*/
static pmdaMetric metrictab[] = {
/* roomtemp.celsius */
{ NULL,
{ PMDA_PMID(0,0), PM_TYPE_FLOAT, DEVICE, PM_SEM_INSTANT,
PMDA_PMUNITS(0,0,0,0,0,0) }, },
/* roomtemp.fahrenheit */
{ NULL,
{ PMDA_PMID(0,1), PM_TYPE_FLOAT, DEVICE, PM_SEM_INSTANT,
PMDA_PMUNITS(0,0,0,0,0,0) }, },
};
/*
* callback provided to pmdaFetch
*/
static int
roomtemp_fetchCallBack(pmdaMetric *mdesc, unsigned int inst, pmAtomValue *atom)
{
__pmID_int *idp = (__pmID_int *)&(mdesc->m_desc.pmid);
char return_msg[128];
int numval = 0;
if (idp->cluster == 0) {
if (inst >= indomtab[DEVICE].it_numinst)
return PM_ERR_INST;
switch (idp->item) {
case 0: /* roomtemp.celsius */
case 1: /* roomtemp.fahrenheit */
if (!Aquire1WireNet(tty, return_msg)) {
fputs(return_msg, stderr);
exit(1);
}
if (ReadTemperature(sntab[inst].sn, &atom->f))
numval = 1;
Release1WireNet(return_msg);
if (idp->item == 1)
/* convert to fahrenheit */
atom->f = atom->f * 9 / 5 + 32;
break;
default:
return PM_ERR_PMID;
}
}
else
return PM_ERR_PMID;
return numval;
}
/*
* Initialise the agent
*/
void
roomtemp_init(pmdaInterface *dp)
{
int i;
char return_msg[128];
unsigned char *p;
if (dp->status != 0)
return;
pmdaSetFetchCallBack(dp, roomtemp_fetchCallBack);
if (!Aquire1WireNet(tty, return_msg)) {
fputs(return_msg, stderr);
exit(1);
}
for (i = 0; ; i++) {
if ((p = nextsensor()) == NULL)
break;
if ((sntab = (sn_t *)realloc(sntab, (i+1) * sizeof(sn_t))) == NULL) {
__pmNoMem("roomtemp_init: realloc sntab", (i+1) * sizeof(sn_t), PM_FATAL_ERR);
}
if ((device = (pmdaInstid *)realloc(device, (i+1) * sizeof(pmdaInstid))) == NULL) {
__pmNoMem("roomtemp_init: realloc device", (i+1) * sizeof(pmdaInstid), PM_FATAL_ERR);
}
if ((device[i].i_name = (char *)malloc(17)) == NULL) {
__pmNoMem("roomtemp_init: malloc name", 17, PM_FATAL_ERR);
}
memcpy(sntab[i].sn, p, 8); /* SN for later fetch */
device[i].i_inst = i; /* internal name is ordinal number */
/* external name is SN in hex */
sprintf(device[i].i_name, "%02X%02X%02X%02X%02X%02X%02X%02X",
p[0], p[1], p[2], p[3], p[4], p[5], p[6], p[7]);
fprintf(stderr, "Found temp sensor SN %s\n", device[i].i_name);
}
Release1WireNet(return_msg);
indomtab[DEVICE].it_numinst = i;
indomtab[DEVICE].it_set = device;
pmdaInit(dp, indomtab, sizeof(indomtab)/sizeof(indomtab[0]), metrictab,
sizeof(metrictab)/sizeof(metrictab[0]));
}
static void
usage(void)
{
fprintf(stderr, "Usage: %s [options] tty ...\n\n", pmProgname);
fputs("Options:\n"
" -d domain use domain (numeric) for metrics domain of PMDA\n"
" -l logfile write log into logfile rather than using default log name\n"
"\nExactly one of the following options may appear:\n"
" -i port expect PMCD to connect on given inet port (number or name)\n"
" -p expect PMCD to supply stdin/stdout (pipe)\n"
" -u socket expect PMCD to connect on given unix domain socket\n"
" -6 port expect PMCD to connect on given ipv6 port (number or name)\n",
stderr);
exit(1);
}
int
main(int argc, char **argv)
{
int err = 0;
int sep = __pmPathSeparator();
pmdaInterface dispatch;
char mypath[MAXPATHLEN];
__pmSetProgname(argv[0]);
snprintf(mypath, sizeof(mypath), "%s%c" "roomtemp" "%c" "help",
pmGetConfig("PCP_PMDAS_DIR"), sep, sep);
pmdaDaemon(&dispatch, PMDA_INTERFACE_3, pmProgname, ROOMTEMP,
"roomtemp.log", mypath);
if (pmdaGetOpt(argc, argv, "D:d:i:l:pu:6:?", &dispatch, &err) != EOF)
err++;
if (err)
usage();
if (argc != optind+1)
usage();
tty = argv[optind];
pmdaOpenLog(&dispatch);
roomtemp_init(&dispatch);
pmdaConnect(&dispatch);
pmdaMain(&dispatch);
exit(0);
}
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