diff --git a/src/3proxy.c b/src/3proxy.c
index 9082f50..57963f0 100644
--- a/src/3proxy.c
+++ b/src/3proxy.c
@@ -199,6 +199,8 @@ void dumpcounters(struct trafcount *tlin, int counterd){
 
  unsigned char tmpbuf[8192];
  struct trafcount *tl;
+ ssize_t len;
+
  if(counterd >= 0 && tlin) {
 
 	conf.time = time(0);
@@ -218,7 +220,8 @@ void dumpcounters(struct trafcount *tlin, int counterd){
 
 	cheader.updated = conf.time;
 	lseek(counterd, 0, SEEK_SET);
-	write(counterd, &cheader, sizeof(struct counter_header));			
+	len = write(counterd, &cheader, sizeof(struct counter_header));
+	if (len != sizeof(struct counter_header)) fprintf(stderr, "%s error: written %ld bytes\n", __func__, len);
 	for(tl=tlin; tl; tl = tl->next){
 		if(tl->number){
 			lseek(counterd, 
@@ -227,7 +230,8 @@ void dumpcounters(struct trafcount *tlin, int counterd){
 			crecord.traf64 = tl->traf64;
 			crecord.cleared = tl->cleared;
 			crecord.updated = tl->updated;
-			write(counterd, &crecord, sizeof(struct counter_record));
+			len = write(counterd, &crecord, sizeof(struct counter_record));
+			if (len != sizeof(struct counter_header)) fprintf(stderr, "%s error: written %ld bytes\n", __func__, len);
 		}
 		if(tl->type!=NEVER && timechanged(tl->cleared, conf.time, tl->type)){
 			tl->cleared = conf.time;
@@ -318,7 +322,7 @@ void cyclestep(void){
 						else
 							strcat((char *)tmpbuf, (char *)conf.archiver[i]);
 					}
-					system((char *)tmpbuf+1);
+					if (system((char *)tmpbuf+1)==-1) fprintf(stderr, "%s: some error in system() call\n", __func__);
 				}
 			}
 		}
diff --git a/src/conf.c b/src/conf.c
index b29d835..b65b0a0 100644
--- a/src/conf.c
+++ b/src/conf.c
@@ -1274,6 +1274,7 @@ static int h_ace(int argc, unsigned char **argv){
 	
 		if((acl->action == COUNTIN)||(acl->action == COUNTOUT)||(acl->action == COUNTALL)) {
 			unsigned long lim;
+			ssize_t len;
 
 			tl->comment = ( char *)argv[1];
 			while(isdigit(*tl->comment))tl->comment++;
@@ -1295,7 +1296,8 @@ static int h_ace(int argc, unsigned char **argv){
 					sizeof(struct counter_header) + (tl->number - 1) * sizeof(struct counter_record),
 					SEEK_SET);
 				memset(&crecord, 0, sizeof(struct counter_record));
-				read(conf.counterd, &crecord, sizeof(struct counter_record));
+				len = read(conf.counterd, &crecord, sizeof(struct counter_record));
+				if (len<sizeof(struct counter_record)) fprintf(stderr, "Error: read %ld bytes insread of %lu\n", len, sizeof(struct counter_record));
 				tl->traf64 = crecord.traf64;
 				tl->cleared = crecord.cleared;
 				tl->updated = crecord.updated;
@@ -1522,7 +1524,10 @@ static int h_chroot(int argc, unsigned char **argv){
 		fprintf(stderr, "Unable to set uid %d", (int)uid);
 		return(5);
 	}
-	chdir("/");
+    if (chdir("/")!=0) {
+        fprintf(stderr, "Unable to chdir /");
+        return(6);
+	}
 	return 0;
 }
 #endif
diff --git a/src/plugins/StringsPlugin/StringsPlugin.c b/src/plugins/StringsPlugin/StringsPlugin.c
index e97098d..4e7faa1 100644
--- a/src/plugins/StringsPlugin/StringsPlugin.c
+++ b/src/plugins/StringsPlugin/StringsPlugin.c
@@ -32,7 +32,7 @@ char **load_string(FILE *f,int max_count_str, int *countloadstr,
  /*find start service section*/
  while(!feof(f))
    {
-     fgets(tmpbuf1, 1023,f);  
+     if (!fgets(tmpbuf1, 1023,f)) break;
      if ((strstr(tmpbuf1,start))!=NULL)  { i++; break; }
      tmpbuf1[0]='\0';
    }
@@ -51,7 +51,7 @@ char **load_string(FILE *f,int max_count_str, int *countloadstr,
   i=0;
  while ( !feof(f) || i< max_count_str)
    {
-     fgets(tmpbuf1, 1023,f);  
+     if (!fgets(tmpbuf1, 1023,f)) break;
  
      if ((strstr(tmpbuf1,stop))!=NULL)  { break; }
 
diff --git a/src/structures.h b/src/structures.h
index 6d929ca..988e828 100644
--- a/src/structures.h
+++ b/src/structures.h
@@ -16,8 +16,12 @@
 #include <sys/stat.h>
 #include <stdint.h>
 #ifndef PRINTF_INT64_MODIFIER
+#if __WORDSIZE == 64
+#define PRINTF_INT64_MODIFIER "l"
+#else
 #define PRINTF_INT64_MODIFIER "ll"
 #endif
+#endif
 #ifdef  __cplusplus
 extern "C" {
 #endif
@@ -711,7 +715,7 @@ struct sockfuncs {
 	int (*_getsockname)(SOCKET s, struct sockaddr * name, socklen_t * namelen);
    	int (*_getsockopt)(SOCKET s, int level, int optname, void * optval, socklen_t * optlen);
 	int (*_setsockopt)(int s, int level, int optname, const void *optval, socklen_t optlen);
-	int (*_poll)(struct pollfd *fds, unsigned int nfds, int timeout);
+	int (*_poll)(struct pollfd *fds, nfds_t, int timeout);
 	size_t (*_send)(SOCKET s, const void *msg, size_t len, int flags);
 	size_t (*_sendto)(SOCKET s, const void *msg, size_t len, int flags, const struct sockaddr *to, SASIZETYPE tolen);
 	size_t (*_recv)(SOCKET s, void *buf, size_t len, int flags);
diff --git a/src/webadmin.c b/src/webadmin.c
index 0aefc38..7478eac 100644
--- a/src/webadmin.c
+++ b/src/webadmin.c
@@ -593,7 +593,7 @@ void * adminchild(struct clientparam* param) {
 			if(writable && !error){
 				fflush(writable);
 #ifndef _WINCE
-				ftruncate(fileno(writable), ftell(writable));
+				if (ftruncate(fileno(writable), ftell(writable))!=0) perror("Failed to truncate");
 #endif
 			}
 			printstr(&pp, error?    "<h3><font color=\"red\">Config file is not writable</font></h3>Make sure you have \"writable\" command in configuration file":