better way to check if files exist

src/misc_tools.h

@@ -109,4 +109,7 @@ int char_rfind(const char *s, char ch, int len);
 /* Converts bytes to appropriate unit and puts in buf as a string */
 void bytes_convert_str(char *buf, int size, uint64_t bytes);
 
+/* checks if a file exists. Returns true or false */
+bool file_exists(const char *fp);
+
 #endif /* #define _misc_tools_h */