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/*
* sensord
*
* A daemon that periodically logs sensor information to syslog.
*
* Copyright (c) 1999-2002 Merlin Hughes <merlin@merlin.org>
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <time.h>
#include <unistd.h>
#include <sys/stat.h>
#include "sensord.h"
#include "lib/error.h"
static const char *sensorsCfgPaths[] = {
"/etc", "/usr/local/etc", "/usr/lib/sensors", "/usr/local/lib/sensors", "/usr/lib", "/usr/local/lib", NULL
};
#define CFG_PATH_LEN 4096
static char cfgPath[CFG_PATH_LEN + 1];
static time_t cfgLastModified;
int
initLib
(void) {
cfgPath[CFG_PATH_LEN] = '\0';
if (!strcmp (sensorsCfgFile, "-")) {
strncpy (cfgPath, sensorsCfgFile, CFG_PATH_LEN);
} else if (sensorsCfgFile[0] == '/') {
strncpy (cfgPath, sensorsCfgFile, CFG_PATH_LEN);
} else if (strchr (sensorsCfgFile, '/')) {
char *cwd = getcwd (NULL, 0);
snprintf (cfgPath, CFG_PATH_LEN, "%s/%s", cwd, sensorsCfgFile);
free (cwd);
} else {
int index0;
struct stat stats;
for (index0 = 0; sensorsCfgPaths[index0]; ++ index0) {
snprintf (cfgPath, CFG_PATH_LEN, "%s/%s", sensorsCfgPaths[index0], sensorsCfgFile);
if (stat (cfgPath, &stats) == 0)
break;
}
if (!sensorsCfgPaths[index0]) {
sensorLog (LOG_ERR, "Error locating sensors configuration file: %s", sensorsCfgFile);
return 9;
}
}
return 0;
}
static int
loadConfig
(int reload) {
struct stat stats;
FILE *cfg = NULL;
int ret = 0;
if (!strcmp (cfgPath, "-")) {
if (!reload) {
if ((ret = sensors_init (stdin))) {
if (ret == -SENSORS_ERR_PROC)
sensorLog (LOG_ERR, "Error reading /proc or /sys; modules probably not loaded");
else
sensorLog (LOG_ERR, "Error %d loading sensors configuration file: <stdin>", ret);
ret = 12;
}
}
} else if (stat (cfgPath, &stats) < 0) {
sensorLog (LOG_ERR, "Error stating sensors configuration file: %s", cfgPath);
ret = 10;
} else if (!reload || (difftime (stats.st_mtime, cfgLastModified) > 0.0)) {
if (reload)
sensorLog (LOG_INFO, "configuration reloading");
if (!(cfg = fopen (cfgPath, "r"))) {
sensorLog (LOG_ERR, "Error opening sensors configuration file: %s", cfgPath);
ret = 11;
} else if ((ret = sensors_init (cfg))) {
if (ret == -SENSORS_ERR_PROC)
sensorLog (LOG_ERR, "Error reading /proc or /sys; modules probably not loaded");
else
sensorLog (LOG_ERR, "Error %d loading sensors configuration file: %s", ret, cfgPath);
ret = 11;
} else {
cfgLastModified = stats.st_mtime;
}
if (cfg)
fclose (cfg);
}
return ret;
}
int
loadLib
(void) {
return loadConfig (0);
}
int
reloadLib
(void) {
return loadConfig (1);
}
int
unloadLib
(void) {
sensors_cleanup ();
return 0;
}
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