Minor changes

Makefile

@@ -5,13 +5,13 @@ CFLAGS=
 
 all: publisher client logger
 
-publisher: src/publisher.c
+publisher: src/publisher.c src/utils.c
 	$(CC) -lzmq $^ -o $@
 
 client: src/client.c
 	$(CC) -lzmq $^ -o $@
 
-logger: src/logger.c
+logger: src/logger.c src/utils.c
 	$(CC) $^ -o $@
 
 clean:

src/logger.c

@@ -16,20 +16,20 @@
 char *__client;
 char __logdir[255];
 char __regpower[100];
-int __logfrequency;
+int __loginterval;
 
 void start(char *power_path, char *busid, char *chipaddr);
 
 int main (int argc, char *argv [])
 {
   if(argc != 4){
-    printf("Usage: %s <abslogdir> <client> <logfrequency>",argv[0]);
+    printf("Usage: %s <abslogdir> <client> <loginterval>",argv[0]);
     exit(1);
   }
 
   //----- Init global variables
   __client=argv[2];
-  __logfrequency=atoi(argv[3]);
+  __loginterval=atoi(argv[3]);
   // __logdir:
   strcat(__logdir,argv[1]);
   strcat(__logdir,"/");
@@ -41,6 +41,16 @@ int main (int argc, char *argv [])
   strcat(__regpower,"/");
   strcat(__regpower,INA260_POWER_REGISTER);
 
+  //----- Sanity checks
+  mkdirp(__logdir);
+  if(!FILE_EXISTS(__regpower)){
+    printf("Logger cannot access to %s\n",__regpower);
+    exit(2);
+  }
+
+  //----- Start logging
+  printf("Logger started [client=%s,interval=%ds]\n",__client,__loginterval);
+
   // Extract bus id and ina260 chip address
   /*char busid[10];
   char chipaddr[10];
@@ -56,7 +66,7 @@ int main (int argc, char *argv [])
 }
 
 void start(char *power_path, char *busid, char *chipaddr){
-  if (access(power_path, F_OK) != 0){
+  if (!FILE_EXISTS(power_path)){
     printf("Could not read %s\n",power_path);
     exit(2);
   }

src/utils.c

@@ -0,0 +1,7 @@
+#include "utils.h"
+
+void mkdirp(char *path){
+    char buffer[255]="mkdir -p ";
+    strcat(buffer,path);
+    system(buffer);
+}

src/utils.h

@@ -1,4 +1,9 @@
+#pragma once
+
 #include <time.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
 
 #define STR(symbol) #symbol
 #define STRINGIFY(symbol) STR(symbol)
@@ -13,3 +18,7 @@
     (INTERVAL(INTERVAL((timestamp),(duration))-1,(duration)))
 
 #define TIMESTAMP() (time(NULL))
+
+#define FILE_EXISTS(path) (access((path), F_OK) == 0)
+
+void mkdirp(char *path);