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#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <sys/ioctl.h>
#include "common.h"
#include "ups.h"
#include "mapping.h"
/* UPSMapping - the logical-to-physical I/O mapping. Filled in by upsd.conf */
static UPS_Map UPSMapping[] = {
{ 0x0, "", "UPSPWR", '\0' },
{ 0x0, "", "UPSOFF", '\0' },
{ 0x0, "", "ACFAIL", '\0' },
{ 0x0, "", "LOWBATT", '\0' },
{ 0x0, "", "UPSDET", '\0' },
{ 0x0, "", "", '\0' }
};
/* These two parallel arrays map RS-232 signal names as found in upsd.conf
to (Linux-specific?) ioctl() codes. */
char serlines[][MAXLEN] = { "RTS", "CTS", "DSR", "DCD", "DTR", "RI", "" };
int sercodes[] = { TIOCM_RTS, TIOCM_CTS, TIOCM_DSR, TIOCM_CD,
TIOCM_DTR, TIOCM_RI, 0x0 };
/*-------------------------------------------------------------------*
Map_Entry
Map parameters from config file to internal line map structure.
Parameters: char *line_param[3] - three strings
UPS_Map *mapping - mapping array for UPS I/O
Returns: number of invalid parameter; 0 otherwise.
*-------------------------------------------------------------------*/
int Map_Entry(char param[3][MAXLEN], UPS_Map *mapping)
{
int upsindex;
int serindex;
/* Determine which UPS line we're mapping - 2nd param in config file*/
for(upsindex=0;(mapping+upsindex)->ups_funcname[0] != '\0';upsindex++)
{
if( strncmp((mapping+upsindex)->ups_funcname, param[1], MAXLEN) == 0 )
break;
}
if( (mapping+upsindex)->ups_funcname[0] == '\0' )
return(2); /* Invalid UPS line parameter */
/* Determine which serial line it's being mapped to - 1st param */
for(serindex=0;serlines[serindex][0] != '\0';serindex++)
{
if( strncmp(serlines[serindex], param[0], MAXLEN) == 0 )
break;
}
if( serlines[serindex][0] == '\0' )
return(1); /* Invalid serial line parameter */
switch( param[2][0] )
{
case 'H':
case 'h':
(mapping+upsindex)->active_state = 'H';
break;
case 'L':
case 'l':
(mapping+upsindex)->active_state = 'L';
break;
default:
return(3); /* Invalid logic level parameter */
}
strncpy((mapping+upsindex)->serial_pin, serlines[serindex], MAXLEN);
(mapping+upsindex)->ioctl_mask = sercodes[serindex];
return(0);
} /* end Map_Entry() */
void Dump_Map(UPS_Map *mapping)
{
int index;
puts("UPS I/O Mapping:");
for(index=0;(mapping+index)->ups_funcname[0] != '\0';index++)
{
printf("UPS Line %s == %s, active '%c', ioctl:%04x\n",
(mapping+index)->ups_funcname, (mapping+index)->serial_pin,
(mapping+index)->active_state, (mapping+index)->ioctl_mask);
}
} /* end Dump_Map() */
/*-------------------------------------------------------------------*
Config_Read
Read UPS pin assignments from config file.
Parameters: char *fname - filename (incl. path) of config file
int test_mode - whether we're in test mode or not
Returns: FALSE if config file couldn't be read or has improper
syntax; TRUE otherwise.
*-------------------------------------------------------------------*/
int Config_Read(char *fname, int mode_test)
{
int index; /* generic loop var */
FILE *configfile;
char inbuff[MAXLINELEN+1];
char line_param[3][MAXLEN];
char line_errmsg[MAXLINELEN+MAXLEN+1];
int status;
int retval = TRUE; /* be optimistic */
/* line_param[0][0] = line_param[1][0] = line_param[2][0] = '\0';*/
if( (configfile = fopen(fname,"r")) == NULL )
{
LogError("config_read", "Couldn't open " CFGFILE);
retval = FALSE;
}
else
{
while( fgets(inbuff, MAXLINELEN, configfile) != NULL )
{
if( (inbuff[0] != '#') &&
(inbuff[0] != '\n') ) /* skip comments and blank lines */
{
if( (status = sscanf(inbuff, "%s %s %s", line_param[0], line_param[1],
line_param[2])) != 3 )
{
LogError("config_read", "Syntax error in " CFGFILE);
retval = FALSE;
break;
}
else
{
if( (status = Map_Entry(line_param, UPSMapping)) > 0 )
{
strcpy(line_errmsg, "Unknown parameter '");
strncat(line_errmsg, line_param[status-1], MAXLEN);
LogError("config_read", line_errmsg);
retval = FALSE;
break;
}
} /* end if/else (3 args in current line) */
} /* end if (non-comment line) */
} /* end while */
fclose(configfile);
} /* end if (config file accessible) */
/* Now as a final check we ensure all UPS lines were given an assignment. */
for(index=0;UPSMapping[index].ups_funcname[0] != '\0';index++)
{
if( UPSMapping[index].active_state == '\0' )
{
LogError("config_read", "One or more UPS lines undefined!");
retval = FALSE;
break;
}
}
/* If things went OK so far and we're in test mode, dump mapping info */
if( (retval == TRUE) && (mode_test) )
Dump_Map(UPSMapping);
return(retval);
} /* end Config_Read() */
/*-------------------------------------------------------------------*
Serial_Set
Set specified lines on the serial port.
Parameters: int fd - File descriptor of monitor device.
int lstate - bit mask of handshake outputs to set.
Returns: Nothing.
*-------------------------------------------------------------------*/
void Serial_Set (int fd, int lstate)
{
ioctl(fd, TIOCMBIS, &lstate);
} /* end Serial_Set() */
/*-------------------------------------------------------------------*
Serial_Clear
Clear specified lines on the serial port.
Parameters: int fd - File descriptor of monitor device.
int lstate - bit mask of handshake outputs to clear.
Returns: Nothing.
*-------------------------------------------------------------------*/
void Serial_Clear (int fd, int lstate)
{
ioctl(fd, TIOCMBIC, &lstate);
} /* end Serial_Clear() */
/*-------------------------------------------------------------------*
UPS_Assert
Asserts a UPS line.
Parameters: int fd - file handle of UPS device
int logical_line - logical UPS line to assert
Returns: <none>
NOTE: References global table UPSMapping[] to map logical_line to
a physical UPS line.
*-------------------------------------------------------------------*/
void UPS_Assert (int fd, int logical_line)
{
int iomask;
iomask = UPSMapping[logical_line].ioctl_mask;
if( toupper(UPSMapping[logical_line].active_state) == 'H' )
Serial_Set(fd, iomask);
else
Serial_Clear(fd, iomask);
} /* end UPS_Assert() */
/*-------------------------------------------------------------------*
UPS_Deassert
De-asserts a UPS line.
Parameters: int fd - file handle of UPS device
int logical_line - logical UPS line to de-assert
Returns: <none>
NOTE: References global table UPSMapping[] to map logical_line to
a physical UPS line.
*-------------------------------------------------------------------*/
void UPS_Deassert (int fd, int logical_line)
{
int iomask;
iomask = UPSMapping[logical_line].ioctl_mask;
if( toupper(UPSMapping[logical_line].active_state) == 'H' )
Serial_Clear(fd, iomask);
else
Serial_Set(fd, iomask);
} /* end UPS_Deassert() */
/*-------------------------------------------------------------------*
UPS_Read
Read UPS physical lines and convert into active-high logical
status.
Parameters: fd - file handle of UPS device
Returns: logical status of each UPS line.
*-------------------------------------------------------------------*/
int UPS_Read(int fd)
{
int flagtemp;
int flags;
int index;
flags = 0;
ioctl (fd, TIOCMGET, &flagtemp);
for(index=0;UPSMapping[index].active_state != '\0';index++)
{
if( toupper(UPSMapping[index].active_state) == 'H' )
{
if( (flagtemp & UPSMapping[index].ioctl_mask) != 0 )
flags |= (0x1<<index);
}
else /* active low physical line */
{
if( (flagtemp & UPSMapping[index].ioctl_mask) == 0 )
flags |= (0x1<<index);
}
}
return(flags);
} /* end UPS_Read() */
/*-------------------------------------------------------------------*
*-------------------------------------------------------------------*/
/*-------------------------------------------------------------------*
*-------------------------------------------------------------------*/
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