Kontron KTAM3874-pITX - Manual (Page 265)

KTD-S0057-I Page 261 Linux® Programming Examples (DebianTM)
KTAM3874/pITX Software Guide
#include <fcntl.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <linux/limits.h>
#include <linux/watchdog.h>
#include "fifo.h"
int parse_wdio (char cmd_line[])
{
static int fd_wd = 0;
const char delim[] = " ,;:-";
char *param1, *param2;
cmd_line [strlen (cmd_line) - 1] = '\0'; /* remove CR */
strsep (&cmd_line, delim); /* suppress the command */
param1 = strsep (&cmd_line, delim);
param2 = strsep (&cmd_line, delim);
if (param1 == (char *) NULL)
return -1;
if (!strcasecmp (param1, WD_ON) && param2 != (char *) NULL && !fd_wd)
{
int time;
time = atoi (param2);
if ((time < 1) || (time > 600))
return -1;
if ((fd_wd = open (wdt, O_WRONLY)) < 0)
return -1;
if (ioctl (fd_wd, WDIOC_SETTIMEOUT, &time))
{
close (fd_wd);
fd_wd = 0;
return -1;
}
return 0;
}
if (!strcasecmp (param1, WD_OFF) && fd_wd)
{
if (write (fd_wd, "V", 1) != 1)
{
close (fd_wd); /* matter of opinion */
fd_wd = 0; /* the same */
return -1;
}
close (fd_wd);
fd_wd = 0;
return 0;
}