diff --git a/base/system.c b/base/system.c
index 6f7827b..eceab3b 100644
--- a/base/system.c
+++ b/base/system.c
@@ -169,6 +169,38 @@ void d_print_init() {
 };
 
 
+#define D_PRINT_COL 16
+void d_print_data (char *data, int len) {
+	int i, j;
+	int val;
+	char txt1 [256] = {0};
+	char txt2 [256] = {0};
+	char left [256] = {0};
+	char right [256] = {0};
+
+	d_printf ("memdump: len:%d", len);
+	for (i = 0; i < len; i++) {
+		val = data[i] & 0x00FF;
+		sprintf (txt1, "%2x ", val);
+		if (data[i] >= ' ' && data[i] <= '~') sprintf (txt2, "%c", data[i]);
+		else sprintf (txt2, ".");
+		strncat (left, txt1, 256);
+		strncat (right, txt2, 256);
+		if ((i%D_PRINT_COL)==D_PRINT_COL-1 || i == len-1) {
+			sprintf (txt1, "   ");
+			sprintf (txt2, " ");
+			for (j = i%D_PRINT_COL; j != 0 && j < D_PRINT_COL; j++) {
+				strncat (left, txt1, 256);
+				strncat (right, txt2, 256);
+			}
+			d_printf ("  |%s | %s |", left, right);
+			memset (left, 0x0, 256);
+			memset (right, 0x0, 256);
+		}
+	}
+};
+
+
 unsigned long long int getticks () {
 	static unsigned long long int ticks = 0;
 
@@ -303,24 +335,24 @@ void memswap (void *mem1, void *mem2, int size) {
 };
 #endif
 
-struct stat *file_exist (char *fn) {
-	static struct stat fs;
+int file_exist (char *fn) {
+	struct stat fs;
 
 	if (stat(fn, &fs) != 0)
-		return NULL;
+		return 0;
 	
-	return &fs;
+	return 1;
 };
 
 
-struct stat *dir_exist (char *fn) {
-	static struct stat fs;
+int dir_exist (char *fn) {
+	struct stat fs;
 	
 	if (stat(fn, &fs) == 0) {
 		if (S_ISDIR(fs.st_mode))
-			return &fs;
+			return 1;
 	}
-	return NULL;
+	return 0;
 }
 
 
diff --git a/base/system.h b/base/system.h
index d8a417d..3a8fb25 100644
--- a/base/system.h
+++ b/base/system.h
@@ -98,6 +98,7 @@ extern void d_printf (char *fmt,...);
 extern void d_print_init();
 extern void d_print_backtrace ();
 extern void d_print_stat ();
+extern void d_print_data (char *data, int len);
 
 extern void errorexit (int nr);
 extern int execcall (struct s_execcall *p, char *prg, char **argv);
@@ -114,8 +115,8 @@ extern char *memstrpop (void *mem, void *dest, int *size);
 extern void memswap (void *mem1, void *mem2, int size);	// maximum 32 bytes
 #endif
 
-struct stat *file_exist (char *fn);
-struct stat *dir_exist (char *fn);
+int file_exist (char *fn);
+int dir_exist (char *fn);
 
 extern char* flags2text (int f, char *text);