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+.\"
+.\" Copyright (C) 2004-2009 by Daniel Stenberg
+.\"
+.\" Permission to use, copy, modify, and distribute this
+.\" software and its documentation for any purpose and without
+.\" fee is hereby granted, provided that the above copyright
+.\" notice appear in all copies and that both that copyright
+.\" notice and this permission notice appear in supporting
+.\" documentation, and that the name of M.I.T. not be used in
+.\" advertising or publicity pertaining to distribution of the
+.\" software without specific, written prior permission.
+.\" M.I.T. makes no representations about the suitability of
+.\" this software for any purpose. It is provided "as is"
+.\" without express or implied warranty.
+.\"
+.TH ARES_DUP 3 "26 May 2009"
+.SH NAME
+ares_dup \- Duplicate a resolver channel
+.SH SYNOPSIS
+.nf
+.B #include <ares.h>
+.PP
+.B int ares_dup(ares_channel *\fIdest\fP, ares_channel \fIsource\fP)
+.fi
+.SH DESCRIPTION
+The \fBares_dup(3)\fP function duplicates an existing communications channel
+for name service lookups. If it returns successfully, \fBares_dup(3)\fP will
+set the variable pointed to by \fIdest\fP to a handle used to identify the
+name service channel. The caller should invoke \fIares_destroy(3)\fP on the
+handle when the channel is no longer needed.
+.SH SEE ALSO
+.BR ares_destroy(3),
+.BR ares_init(3),
+.BR ares_library_init(3)
+.SH AVAILABILITY
+\fIares_dup(3)\fP was added in c-ares 1.6.0
+.SH AUTHOR
+Daniel Stenberg
+