processes plugin: fix 3 compiler warnings on OS X

[collectd.git] / src / ted.c

diff --git a/src/ted.c b/src/ted.c
index d2a73a5..5ed6c27 100644 (file)
--- a/src/ted.c
+++ b/src/ted.c
@@ -35,9 +35,9 @@
  **/
 
 #include "collectd.h"
+
 #include "common.h"
 #include "plugin.h"
-#include "configfile.h"
 
 #if HAVE_TERMIOS_H && HAVE_SYS_IOCTL_H && HAVE_MATH_H
 # include <termios.h>
@@ -70,11 +70,15 @@ static int ted_read_value(double *ret_power, double *ret_voltage)
 {
     unsigned char receive_buffer[300];
     unsigned char package_buffer[300];
-    char pkt_request[1] = {0xAA};
+    unsigned char pkt_request[1] = {0xAA};
     int package_buffer_pos;
 
     fd_set input;
-    struct timeval timeout;
+
+    /* Initialize timeout structure, set to 2 seconds */
+    struct timeval timeout = {
+      .tv_sec = 2
+    };
 
     int end_flag;
     int escape_flag;
@@ -87,11 +91,6 @@ static int ted_read_value(double *ret_power, double *ret_voltage)
     FD_ZERO (&input);
     FD_SET (fd, &input);
 
-    /* Initialize timeout structure, set to 2 seconds */
-    memset (&timeout, 0, sizeof (timeout));
-    timeout.tv_sec = 2;
-    timeout.tv_usec = 0;
-
     /* clear out anything in the buffer */
     tcflush (fd, TCIFLUSH);
 
@@ -104,12 +103,10 @@ static int ted_read_value(double *ret_power, double *ret_voltage)
 
     /* Loop until we find the end of the package */
     end_flag = 0;
-    escape_flag = 0;
-    package_buffer_pos = -1;
+    package_buffer_pos = 0;
     while (end_flag == 0)
     {
         ssize_t receive_buffer_length;
-        ssize_t i;
 
         /* check for timeout or input error*/
         status = select (fd + 1, &input, NULL, NULL, &timeout);
@@ -148,7 +145,7 @@ static int ted_read_value(double *ret_power, double *ret_voltage)
             WARNING ("ted plugin: Received EOF from file descriptor.");
             return (-1);
         }
-        else if (receive_buffer_length > sizeof (receive_buffer))
+        else if (((size_t) receive_buffer_length) > sizeof (receive_buffer))
         {
             ERROR ("ted plugin: read(2) returned invalid value %zi.",
                     receive_buffer_length);
@@ -164,9 +161,9 @@ static int ted_read_value(double *ret_power, double *ret_voltage)
         /* We need to see the begin sequence first. When we receive `ESCAPE
          * PKT_BEGIN', we set `package_buffer_pos' to zero to signal that
          * the beginning of the package has been found. */
-        package_buffer_pos = -1;
+
         escape_flag = 0;
-        for (i = 0; i < receive_buffer_length; i++)
+        for (ssize_t i = 0; i < receive_buffer_length; i++)
         {
             /* Check if previous byte was the escape byte. */
             if (escape_flag == 1)
@@ -209,16 +206,15 @@ static int ted_read_value(double *ret_power, double *ret_voltage)
     } /* while (end_flag == 0) */
 
     /* Check for errors inside the loop. */
-    if (end_flag == 0)
+    if ((end_flag == 0) || (package_buffer_pos != EXPECTED_PACKAGE_LENGTH))
         return (-1);
 
-    /* 
+    /*
      * Power is at positions 247 and 248 (LSB first) in [10kW].
      * Voltage is at positions 251 and 252 (LSB first) in [.1V].
      *
-     * According to Eric's patch the power is in 10kW steps, but according to a
-     * Python module I've found, it's in 0.01kW == 10W. IMHO the Python scale
-     * is more realistic. -octo
+     * Power is in 10 Watt steps
+     * Voltage is in volts
      */
     *ret_power = 10.0 * (double) ((((int) package_buffer[248]) * 256)
             + ((int) package_buffer[247]));
@@ -265,7 +261,7 @@ static int ted_open_device (void)
     return (0);
 } /* int ted_open_device */
 
-static void ted_submit (char *type_instance, double value)
+static void ted_submit (const char *type, double value)
 {
     value_t values[1];
     value_list_t vl = VALUE_LIST_INIT;
@@ -276,8 +272,7 @@ static void ted_submit (char *type_instance, double value)
     vl.values_len = 1;
     sstrncpy (vl.host, hostname_g, sizeof (vl.host));
     sstrncpy (vl.plugin, "ted", sizeof (vl.plugin));
-    sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
-    sstrncpy (vl.type, "ted", sizeof (vl.type));
+    sstrncpy (vl.type, type, sizeof (vl.type));
 
     plugin_dispatch_values (&vl);
 }
@@ -315,7 +310,6 @@ static int ted_read (void)
     double power;
     double voltage;
     int status;
-    int i;
 
     status = ted_open_device ();
     if (status != 0)
@@ -323,7 +317,7 @@ static int ted_read (void)
 
     power = NAN;
     voltage = NAN;
-    for (i = 0; i <= conf_retries; i++)
+    for (int i = 0; i <= conf_retries; i++)
     {
         status = ted_read_value (&power, &voltage);
         if (status == 0)