-The function \fBfield_userptr\fR returns \fBNULL\fR on error. The function
-\fBset_field_userptr\fR returns one of the following:
-.TP 5
-\fBE_OK\fR
-The routine succeeded.
-.TP 5
-\fBE_SYSTEM_ERROR\fR
-System error occurred (see \fBerrno\fR).
+The function \fBfield_userptr\fR returns a pointer (which may be \fBNULL\fR).
+It does not set errno.
+.PP
+The function \fBset_field_userptr\fR returns \fBE_OK\fP (success).