Index: uspace/lib/fmtutil/fmtutil.h
===================================================================
--- uspace/lib/fmtutil/fmtutil.h	(revision cde999aca79219e8751af76502001a86d411d176)
+++ uspace/lib/fmtutil/fmtutil.h	(revision da9d6cae9d1c35542e015f3d2826946a83fef587)
@@ -44,10 +44,10 @@
  * @returns EOK on success or an error code on failure
  */
-typedef int (*line_consumer_fn)(wchar_t *, size_t, bool, void *);
+typedef errno_t (*line_consumer_fn)(wchar_t *, size_t, bool, void *);
 
-extern int print_aligned_w(const wchar_t *, size_t, bool, align_mode_t);
-extern int print_aligned(const char *, size_t, bool, align_mode_t);
-extern int print_wrapped(const char *, size_t, align_mode_t);
-extern int print_wrapped_console(const char *, align_mode_t);
+extern errno_t print_aligned_w(const wchar_t *, size_t, bool, align_mode_t);
+extern errno_t print_aligned(const char *, size_t, bool, align_mode_t);
+extern errno_t print_wrapped(const char *, size_t, align_mode_t);
+extern errno_t print_wrapped_console(const char *, align_mode_t);
 
 /** Wrap characters in a wide string to the given length.
@@ -58,3 +58,3 @@
  * @param data user data to pass to the consumer function
  */
-extern int wrap(wchar_t *, size_t, line_consumer_fn, void *);
+extern errno_t wrap(wchar_t *, size_t, line_consumer_fn, void *);