fixed reading too short records from stdin

crude/main.c

@@ -705,9 +705,13 @@ static int decode_file(void)
 
 	memset(str1,0,INET6_ADDRSTRLEN);
 	memset(str2,0,INET6_ADDRSTRLEN);
-
-	while(read(main_file,buffer,buf_len) > 0)
+	char *buffer_p=buffer;
+	int ngot = 0, nleft=buf_len;
+	
+	while( (ngot=read(main_file,buffer_p, nleft)) > 0)
 	{
+	  if ( (nleft -= ngot) == 0){ // got full buffer
+	    // if (ngot < buf_len) fprintf( stderr, "Got %d bytes\n", ngot);
 		pkt_count++;
 		ptr1 = (struct udp_data*)buffer;
 		ptr2 = (struct crude_struct*)(buffer + sizeof(struct udp_data));
@@ -729,6 +733,19 @@ static int decode_file(void)
 		       (unsigned long)ntohl(ptr2->rx_time_seconds),
 		       (unsigned long)ntohl(ptr2->rx_time_useconds),
 		       (long)ntohl(ptr2->pkt_size));
+		int tx=(unsigned long)ntohl(ptr1->tx_time_seconds);
+		if ( tx < 1440000000 || tx > 1600000000 ) 
+		  fprintf( stderr, "Tx is odd %ld - Got %d bytes\n", tx, ngot);
+		nleft=buf_len;
+		buffer_p=buffer;
+	  } else if (nleft < 0) { // never occurs I hope
+	    fprintf( stderr, "Got %d bytes, left %d\n", ngot, nleft);
+	  } else { // get data to fill buffer
+	      buffer_p+=ngot;
+	      // fprintf( stderr, "Got only %d bytes\n", ngot);
+	  }
+	      
+	      
 	}
 
 	if(errno){ RUDEBUG1("crude: read failed: %s\n", strerror(errno)); }