Logging to file as per spec.v1.0

1 files changed, 63 insertions, 8 deletions

diff --git a/modbuslog.c b/modbuslog.c
index 6d14ce1..e9346eb 100644
--- a/modbuslog.c
+++ b/modbuslog.c
@@ -18,6 +18,7 @@
  */
 
 // gcc modbuslog.c -o modbuslog `pkg-config --libs --cflags libmodbus libconfig`
+
 #include <stdio.h>
 #include <unistd.h>
 #include <stdlib.h>
@@ -26,6 +27,7 @@
 #include <unistd.h>
 #include <sys/select.h>
 #include <signal.h>
+#include <fcntl.h>
 
 #include <libconfig.h>
 #include <modbus.h>
@@ -39,7 +41,6 @@
 #define SLAVE_ID 1
 #define START_ADDRESS 0
 #define NUMBER_REGISTERS 14
-#define DEBUG 1
 
 void minute_check(int signum) {
 	alarm(60);
@@ -69,7 +70,15 @@ void find_mac(unsigned char* mac_address) {
 
 int main(int argc, char *argv[]) {
 
-	const char *CONFIG_FILE = "modbuslog.cfg";
+	const char *configfile = "modbuslog.cfg";
+
+	int DEBUG = 0;
+	int k;
+	for (k = 1; k < argc; k++) {
+		if (strcmp(argv[k], "-d") == 0) {
+			DEBUG = 1;
+		}
+	}
 
 	config_t cfg;
 	//config_setting_t *setting;
@@ -86,11 +95,11 @@ int main(int argc, char *argv[]) {
 
 	find_mac(mac_address);
 
-	if (!config_read_file(&cfg, CONFIG_FILE)) {
+	if (!config_read_file(&cfg, configfile)) {
 		fprintf(stderr, "%s:%d - %s\n", config_error_file(&cfg),
 				config_error_line(&cfg), config_error_text(&cfg));
 		config_destroy(&cfg);
-		fprintf(stderr, "Unable to find CONFIG_FILE.\n");
+		fprintf(stderr, "Unable to find configfile.\n");
 		return -1;
 	}
 
@@ -122,7 +131,7 @@ int main(int argc, char *argv[]) {
 		select(0, NULL, NULL, NULL, NULL);
 
 		time_t t = time(NULL);
-		int unixtime_min = (((int) t) / 60 * 60);
+		time_t unixtime_min = (((int) t) / 60 * 60);
 		//int unixtime = (int) t;
 		//printf("%d\n", unixtime);
 
@@ -159,7 +168,7 @@ int main(int argc, char *argv[]) {
 
 			int intervalduration;
 
-			if (intervalunit[0] == 'H')
+			if (intervalunit[0] == 'h')
 				intervalduration = intervalvalue * 3600;
 			else
 				intervalduration = intervalvalue * 60;
@@ -192,15 +201,61 @@ int main(int argc, char *argv[]) {
 				if (rc == -1) {
 					fprintf(stderr, "ERROR: %s\n", modbus_strerror(errno));
 					//return -1;
+					rc = modbus_read_input_registers(ctx, startaddress,
+							numregisters, tab_reg);
 				}
 
-				for (i = 0; i < rc; i = i + 2) {
-					printf("reg[%d]=%d\n", i, tab_reg[i] + tab_reg[i + 1]);
+				//<mac address>_YYYY_MM_DD_HH_MM_SS.log
+				time_t unixtime_day = ((((int) t) / 86400 * 86400) + 86400);
+
+				struct tm midnight = *localtime(&unixtime_day);
+
+				char filename[50];
+
+				sprintf(filename, "%s_%04i_%02i_%02i_%02i_%02i_%02i.log",
+						mac_address, midnight.tm_year + 1900,
+						midnight.tm_mon + 1, midnight.tm_mday, midnight.tm_hour,
+						midnight.tm_min, midnight.tm_sec);
+
+				//printf("%s\n",filename);
+
+				FILE *fp = fopen(filename, "r");
+				if (fp) {
+					fclose(fp);
+				} else {
+					// file doesn't exist. create it.
+					FILE *fp = fopen(filename, "w");
+					fprintf(
+							fp,
+							"IntervalID|UTCDate|UTCTime|LOCALDate|LOCALTime|SensorID|RegisterID|Reading\n");
+					fclose(fp);
 				}
 
+				FILE *filehandle = fopen(filename, "a+");
+
+				uint16_t registervalue = 0;
+
+				int p;
+				for (p = 0; p < numregisters; p = p + 2) {
+					registervalue += tab_reg[i] + tab_reg[i + 1];
+				}
+
+				struct tm utc = *gmtime(&unixtime_min);
+				struct tm lc = *localtime(&unixtime_min);
+
+				fprintf(
+						filehandle,
+						"1|%04i%02i%02i|%02i%02i%02i|%04i%02i%02i|%02i%02i%02i|%i|%i|%i\n",
+						utc.tm_year + 1900, utc.tm_mon + 1, utc.tm_mday,
+						utc.tm_hour, utc.tm_min, utc.tm_sec, lc.tm_year + 1900,
+						lc.tm_mon + 1, lc.tm_mday, lc.tm_hour, lc.tm_min,
+						lc.tm_sec, slaveid, startaddress, registervalue);
+				fclose(filehandle);
+
 				modbus_close(ctx);
 				modbus_free(ctx);
 
+				sleep(1);
 				//return 0;
 
 			}