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+.TH IPSEC_VERSION 3 "21 Nov 2001"
+.\" RCSID $Id: version.3,v 1.1 2004/03/15 20:35:26 as Exp $
+.SH NAME
+ipsec ipsec_version_code \- get IPsec version code
+.br
+ipsec ipsec_version_string \- get full IPsec version string
+.br
+ipsec ipsec_copyright_notice \- get IPsec copyright notice
+.SH SYNOPSIS
+.B "#include <freeswan.h>
+.sp
+.B "const char *ipsec_version_code(void);"
+.br
+.B "const char *ipsec_version_string(void);"
+.br
+.B "const char **ipsec_copyright_notice(void);"
+.SH DESCRIPTION
+These functions provide information on version numbering and copyright
+of the Linux FreeS/WAN IPsec implementation.
+.PP
+.I Ipsec_version_code
+returns a pointer to a string constant
+containing the current IPsec version code,
+such as ``1.92'' or ``snap2001Nov19b''.
+.PP
+.I Ipsec_version_string
+returns a pointer to a string constant giving a full version identification,
+consisting of the version code preceded by a prefix identifying the software,
+e.g. ``Linux FreeS/WAN 1.92''.
+.PP
+.I Ipsec_copyright_notice
+returns a pointer to a vector of pointers,
+terminated by a
+.BR NULL ,
+which is the text of a suitable copyright notice.
+Each pointer points to a string constant (possibly empty) which is one line
+of the somewhat-verbose copyright notice.
+The strings are NUL-terminated and do not contain a newline;
+supplying suitable line termination for the output device is
+the caller's responsibility.
+.SH SEE ALSO
+ipsec(8)
+.SH HISTORY
+Written for the FreeS/WAN project by Henry Spencer.