+int osl_munmap(void *start, size_t length);
+int write_all(int fd, const char *buf, size_t *len);
+int write_file(const char *filename, const void *buf, size_t size);
+int truncate_file(const char *filename, off_t size);
+
+/**
+ * A wrapper for mkdir(2).
+ *
+ * \param path Name of the directory to create.
+ * \param mode The permissions to use.
+ *
+ * \return Standard.
+ */
+static inline int osl_mkdir(const char *path, mode_t mode)
+{
+ if (!mkdir(path, mode))
+ return 1;
+ return -ERRNO_TO_ERROR(errno);
+}
+
+/**
+ * A wrapper for rename(2).
+ *
+ * \param old_path The source path.
+ * \param new_path The destination path.
+ *
+ * \return Standard.
+ *
+ * \sa rename(2).
+ */
+_static_inline_ int osl_rename(const char *old_path, const char *new_path)
+{
+ if (rename(old_path, new_path) < 0)
+ return -ERRNO_TO_ERROR(errno);
+ return 1;
+}
+
+_static_inline_ int osl_stat(const char *path, struct stat *buf)
+{
+ if (stat(path, buf) >= 0)
+ return 1;
+ return -ERRNO_TO_ERROR(errno);
+}