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.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
.TH "ISCNTRL" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
.\" iscntrl
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
.SH NAME
iscntrl \- test for a control character
.SH SYNOPSIS