# include <termios.h>
# include <sys/ioctl.h>
# include <math.h>
-# define MULTIMETER_HAVE_READ 1
#else
-# define MULTIMETER_HAVE_READ 0
-# error "multimeter cannot read!"
+# error "No applicable input method."
#endif
-static data_source_t data_source[1] =
-{
- {"value", DS_TYPE_GAUGE, NAN, NAN}
-};
-
-static data_set_t data_set =
-{
- "multimeter", 1, data_source
-};
-
-#if MULTIMETER_HAVE_READ
static int fd = -1;
-static int multimeter_timeval_sub (struct timeval *tv1, struct timeval *tv2,
- struct timeval *res)
-{
- if ((tv1->tv_sec < tv2->tv_sec) ||
- ((tv1->tv_sec == tv2->tv_sec) && (tv1->tv_usec < tv2->tv_usec)))
- return (-1);
-
- res->tv_sec = tv1->tv_sec - tv2->tv_sec;
- res->tv_usec = tv1->tv_usec - tv2->tv_usec;
-
- assert ((res->tv_sec > 0) || ((res->tv_sec == 0) && (res->tv_usec > 0)));
-
- while (res->tv_usec < 0)
- {
- res->tv_usec += 1000000;
- res->tv_sec--;
- }
- return (0);
-}
#define LINE_LENGTH 14
static int multimeter_read_value(double *value)
{
if (gettimeofday (&time_end, NULL) < 0)
{
- syslog (LOG_ERR, "multimeter plugin: gettimeofday failed: %s",
- strerror (errno));
+ char errbuf[1024];
+ ERROR ("multimeter plugin: gettimeofday failed: %s",
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
time_end.tv_sec++;
struct timeval timeout;
struct timeval time_now;
- write(fd, "D", 1);
+ status = swrite (fd, "D", 1);
+ if (status < 0)
+ {
+ ERROR ("multimeter plugin: swrite failed.");
+ return (-1);
+ }
FD_ZERO(&rfds);
FD_SET(fd, &rfds);
if (gettimeofday (&time_now, NULL) < 0)
{
- syslog (LOG_ERR, "multimeter plugin: "
+ char errbuf[1024];
+ ERROR ("multimeter plugin: "
"gettimeofday failed: %s",
- strerror (errno));
+ sstrerror (errno, errbuf,
+ sizeof (errbuf)));
return (-1);
}
- if (multimeter_timeval_sub (&time_end, &time_now, &timeout) == -1)
+ if (timeval_cmp (time_end, time_now, &timeout) < 0)
break;
status = select(fd+1, &rfds, NULL, NULL, &timeout);
}
else /* status == -1 */
{
- syslog (LOG_ERR, "multimeter plugin: "
+ char errbuf[1024];
+ ERROR ("multimeter plugin: "
"select failed: %s",
- strerror (errno));
+ sstrerror (errno, errbuf, sizeof (errbuf)));
break;
}
}
for (i = 0; i < 10; i++)
{
- device[strlen(device)-1] = i + '0';
+ device[strlen(device)-1] = i + '0';
- if ((fd = open(device, O_RDWR | O_NOCTTY)) > 0)
+ if ((fd = open(device, O_RDWR | O_NOCTTY)) != -1)
{
- struct termios tios;
+ struct termios tios = { 0 };
int rts = TIOCM_RTS;
double value;
tios.c_cflag = B1200 | CS7 | CSTOPB | CREAD | CLOCAL;
tios.c_iflag = IGNBRK | IGNPAR;
- tios.c_oflag = 0;
+ tios.c_oflag = 0;
tios.c_lflag = 0;
tios.c_cc[VTIME] = 3;
tios.c_cc[VMIN] = LINE_LENGTH;
tcflush(fd, TCIFLUSH);
tcsetattr(fd, TCSANOW, &tios);
ioctl(fd, TIOCMBIC, &rts);
-
+
if (multimeter_read_value (&value) < -1)
{
close (fd);
}
else
{
- syslog (LOG_INFO, "multimeter plugin: Device "
+ INFO ("multimeter plugin: Device "
"found at %s", device);
return (0);
}
}
}
- syslog (LOG_ERR, "multimeter plugin: No device found");
+ ERROR ("multimeter plugin: No device found");
return (-1);
}
#undef LINE_LENGTH
vl.values = values;
vl.values_len = 1;
- vl.time = time (NULL);
- strcpy (vl.host, hostname_g);
- strcpy (vl.plugin, "multimeter");
+ sstrncpy (vl.host, hostname_g, sizeof (vl.host));
+ sstrncpy (vl.plugin, "multimeter", sizeof (vl.plugin));
+ sstrncpy (vl.type, "multimeter", sizeof (vl.type));
- plugin_dispatch_values ("multimeter", &vl);
+ plugin_dispatch_values (&vl);
}
static int multimeter_read (void)
return (0);
}
-#endif /* MULTIMETER_HAVE_READ */
void module_register (void)
{
- plugin_register_data_set (&data_set);
-
-#if MULTIMETER_HAVE_READ
plugin_register_init ("multimeter", multimeter_init);
plugin_register_read ("multimeter", multimeter_read);
plugin_register_shutdown ("multimeter", multimeter_shutdown);
-#endif /* MULTIMETER_HAVE_READ */
-}
+} /* void module_register */