.Va errno
is set to indicate the error.
.Sh ERRORS
-.Fn Chflags
+.Fn chflags
will fail if:
.Bl -tag -width Er
.It Bq Er ENOTDIR
The operation isn't supported by the filesystem.
.El
.Pp
-.Fn Fchflags
+.Fn fchflags
will fail if:
.Bl -tag -width Er
.It Bq Er EBADF