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/********************************************************************
File: ups.c
Purpose: Read UPS status.
Copyright 1996, Bob Hauck
Copyright 1998, Michael Robinton
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.
Language: GCC 2.7.0
Author: Bob Hauck
Modified: Michael Robinton
Modified: Russ Magee
Revision 1.3 2000/06/09 14:54:00 Michael Robinton/Russ Magee
Integrate Russ Magee's pin remapping contribution.
RM..
Removed pin assignment #defines -- now read from upsd.conf
Changed all code to use logical UPS lines, supported by mapping.c,h
Revision 1.2 1998/05/22 10:39:00 miker
Add logging status string VERSION.
UPS_Setup UPS kill needs to be in the OFF
state after an attempt is made to kill the power.
This is a pulsed signal.
Revision 1.1 1996/11/23 16:45:12 bobh
Initial revision
**********************************************************************/
#include <sys/ioctl.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include "common.h"
#include "mapping.h"
#include "ups.h"
/* Status strings for logging. The VERSIONs don't have to match
* since the VERSION message is sent but never decoded by NET_CHECK */
char *StatusString [] =
{
"OK",
"ON BATTERY",
"LOW BATTERY",
"UPS_ERROR",
VERSION
};
/*-------------------------------------------------------------------*
UPS_Open
Open the UPS monitor device (serial port).
Parameters: DevName - Name of the device to open.
Returns: File descriptor that was opened.
*-------------------------------------------------------------------*/
int UPS_Open (char *DevName)
{
int fd;
if ((fd = open (DevName, O_RDWR | O_NDELAY)) < 0)
{
LogError ("opendev", (char *) sys_errlist [errno]);
}
return fd;
}
/*-------------------------------------------------------------------*
UPS_Setup
Set up the port for monitoring. Optionally kill the UPS
power (only works if the UPS is on battery).
Parameters: fd - File descriptor of monitor device.
kill - TRUE to shut down UPS power.
Returns: Nothing.
*-------------------------------------------------------------------*/
void UPS_Setup (int fd, int kill)
{
/* Most UPS units need power from the PC for status lines so we set
it here */
UPS_Assert(fd, L_UPSPWR);
if (!kill)
{
UPS_Deassert(fd, L_KILL);
sleep (1);
}
if (kill)
{
LogError ("kill", "Attempting to kill the power!\n");
UPS_Deassert(fd, L_KILL);
sleep (5);
UPS_Assert(fd, L_KILL);
sleep (5);
UPS_Deassert(fd, L_KILL);
sleep (1);
/* Hmmm..... If you have a power outage, you won't make it!
*/
exit (0);
}
}
/*-------------------------------------------------------------------*
UPS_Check
Check the status of the UPS (Ok, On Battery, or Low Battery).
Parameters: fd - File descriptor of monitor device.
Returns: S_* status code.
*-------------------------------------------------------------------*/
int UPS_Check (int fd)
{
int flags;
int status;
flags = UPS_Read(fd);
/* printf("LogStatus: %04x\n", flags); fflush(stdout);*/
status = (flags & (B_ONBAT | B_LOBAT));
if ((flags & B_ERR) == 0)
{
return S_ERROR; /* bad UPS cable? */
}
switch (status)
{
/* On battery, but battery ok
*/
case B_ONBAT:
status = S_ONBAT;
break;
/* On battery, and battery is low
*/
case (B_LOBAT | B_ONBAT):
status = S_LOBAT;
break;
/* Everything is a-ok
*/
default:
status = S_OK;
}
return status;
}
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