Minor changes

Makefile

@@ -20,12 +20,12 @@ logger: src/logger.c src/utils.c config.mk
 	$(CC) $(filter-out config.mk,$^) -o $@ $(MACROS)
 
 publish: publisher logger
-	[ -f pid ] && { kill $(shell cat pid); rm pid; }
 	for client in $$(basename -a /home/loic/registers/*); \
 	do \
 		./logger $(LOGGERS_DIR) $$client $(LOG_INTERVAL) &> logger_$${client}.log & echo $$! >> pid; \
 	done
 	./publisher $(LOGGERS_DIR) $(LOG_INTERVAL) $(SUBSCRIBER_ADDR) $(ZMQ_PORT) $(KEY)
+	[ -f pid ] && { kill -INT $(shell cat pid); rm pid; }
 
 subscribe: subscriber
 	./subscriber $(ZMQ_PORT) $(SUBSCRIBER_DIR)

src/logger.c

@@ -8,6 +8,7 @@
 #include <sys/stat.h>
 #include "utils.h"
 #include <time.h>
+#include <signal.h>
 
 #ifndef LOGGER_DELAY
 #define LOGGER_DELAY 0
@@ -18,6 +19,14 @@ char *__client;
 char __logdir[STATIC_LEN];
 char __regpower[STATIC_LEN];
 int __loginterval;
+unsigned char __stop=0;
+
+void sighandler(int signo){
+  if (signo == SIGINT){
+    printf("Stopping...\n");
+    __stop=1;
+  }
+}
 
 int main (int argc, char *argv [])
 {
@@ -41,6 +50,7 @@ int main (int argc, char *argv [])
   strcat(__regpower,INA260_POWER_REGISTER);
 
   //----- Sanity checks
+  signal(SIGINT,sighandler);
   mkdirp(__logdir);
   if(__loginterval<MIN_INTERVAL){
     printf("Log interval is too small (min=%ds)\n",MIN_INTERVAL);
@@ -62,7 +72,7 @@ int main (int argc, char *argv [])
   time_t interval;
   struct timespec power_ts;
   
-  while(1){
+  while(!__stop){
     interval=INTERVAL(__loginterval);
     *logfilepath='\0';
     sprintf(logfilepath,"%s/%ld",__logdir,interval);

src/publisher.c

@@ -2,6 +2,7 @@
 #include <assert.h>
 #include <time.h>
 #include <dirent.h>
+#include <signal.h>
 
 #include "utils.h"
 
@@ -12,9 +13,17 @@ char *__interface;
 char *__ip;
 int __loginterval;
 int __port;
+unsigned char __stop=0;
 
 void publish(void *publisher, char *filepath, char* client, long int interval);
 
+void sighandler(int signo){
+  if (signo == SIGINT){
+    printf("Stopping...\n");
+    __stop=1;
+  }
+}
+
 int main (int argc, char *argv [])
 {
     if(argc != 6){
@@ -30,6 +39,7 @@ int main (int argc, char *argv [])
     __key=argv[5];
 
     //----- Sanity checks
+    signal(SIGINT,sighandler);
     if(__loginterval<MIN_INTERVAL){
         printf("Log interval is too small (min=%ds)\n",MIN_INTERVAL);
         exit(2);
@@ -48,7 +58,7 @@ int main (int argc, char *argv [])
 
     //----- Start publisher
     struct dirent *de;  // Pointer for directory entry
-    while(1){
+    while(!__stop){
         int interval=INTERVAL(__loginterval);
         int interval_next=INTERVAL_NEXT(__loginterval);
         DIR *dr = opendir(__logdir);
@@ -63,7 +73,7 @@ int main (int argc, char *argv [])
                     // As long as next logfile is not available, we should wait
                     // for sending the current one
                     printf("Waiting for %s logger measurements...\n",client);
-                    while(!FILE_EXISTS(logfile_next)){
+                    while(!FILE_EXISTS(logfile_next) && (!__stop)){
                         sleep(1);
                     }
                     // Send current one

src/subscriber.c

@@ -2,9 +2,17 @@
 #include <assert.h>
 #include <time.h>
 #include <string.h>
-
+#include <signal.h>
 #include "utils.h"
 
+unsigned char __stop=0;
+void sighandler(int signo){
+  if (signo == SIGINT){
+    printf("Stopping...\n");
+    __stop=1;
+  }
+}
+
 int main (int argc, char *argv [])
 {
   if(argc != 3){
@@ -18,6 +26,7 @@ int main (int argc, char *argv [])
 
   //----- Various inits
   mkdirp(cdatadir);
+  signal(SIGINT,sighandler);
 
   //----- Init ZMQ
   void *context = zmq_ctx_new ();
@@ -35,8 +44,10 @@ int main (int argc, char *argv [])
   //----- Listen
   char buffer[ZMQ_MSG_SIZE];
   int size;
-  while(1){
+  while(!__stop){
     size=zmq_recv (subscriber, buffer, ZMQ_MSG_SIZE-1, 0);
+    if(size<=0)
+      continue;
     buffer[size < ZMQ_MSG_SIZE ? size : ZMQ_MSG_SIZE - 1] = '\0';
     //----- Read buffer
     char *token = strtok(buffer, "\n");