Index: uspace/app/df/df.c
===================================================================
--- uspace/app/df/df.c	(revision 9af1c61b92a35908b9af07874373f345e922fede)
+++ uspace/app/df/df.c	(revision a0a9cc249adce31c755defdb6b74a991ebbf55ea)
@@ -56,7 +56,7 @@
 static bool display_blocks;
 
-static int size_to_human_readable(uint64_t, size_t, char **);
+static errno_t size_to_human_readable(uint64_t, size_t, char **);
 static void print_header(void);
-static int print_statfs(struct statfs *, char *, char *);
+static errno_t print_statfs(struct statfs *, char *, char *);
 static void print_usage(void);
 
@@ -65,5 +65,5 @@
 	int optres, errflg = 0;
 	struct statfs st;
-	int rc;
+	errno_t rc;
 
 	display_blocks = false;
@@ -128,5 +128,5 @@
 }
 
-static int size_to_human_readable(uint64_t nblocks, size_t block_size, char **rptr)
+static errno_t size_to_human_readable(uint64_t nblocks, size_t block_size, char **rptr)
 {
 	cap_spec_t cap;
@@ -147,10 +147,10 @@
 }
 
-static int print_statfs(struct statfs *st, char *name, char *mountpoint)
+static errno_t print_statfs(struct statfs *st, char *name, char *mountpoint)
 {
 	uint64_t const used_blocks = st->f_blocks - st->f_bfree;
 	unsigned const perc_used = PERCENTAGE(used_blocks, st->f_blocks);
 	char *str;
-	int rc;
+	errno_t rc;
 
 	printf("%10s", name);