90 lines
2.8 KiB
Groff
90 lines
2.8 KiB
Groff
.\" $KAME: ipsec_strerror.3,v 1.9 2001/08/17 07:21:36 itojun Exp $
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.\" $FreeBSD$
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.\"
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.\" Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project.
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. Neither the name of the project nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.Dd May 6, 1998
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.Dt IPSEC_STRERROR 3
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.Os
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.\"
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.Sh NAME
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.Nm ipsec_strerror
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.Nd error message for IPsec policy manipulation library
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.\"
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.Sh SYNOPSIS
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.In netinet6/ipsec.h
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.Ft "const char *"
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.Fn ipsec_strerror
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.\"
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.Sh DESCRIPTION
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.In netinet6/ipsec.h
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declares
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.Pp
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.Dl extern int ipsec_errcode;
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.Pp
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which is used to pass an error code from IPsec policy manipulation library
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to an user program.
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The
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.Fn ipsec_strerror
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function can be used to obtain the error message string for the error code.
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.Pp
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The array pointed to is not to be modified by the program.
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Since
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.Fn ipsec_strerror
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uses
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.Xr strerror 3
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as underlying function, calling
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.Xr strerror 3
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after
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.Fn ipsec_strerror
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would make the return value from
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.Fn ipsec_strerror
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invalid, or overwritten.
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.\"
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.Sh RETURN VALUES
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The
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.Fn ipsec_strerror
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function always returns a pointer to C string.
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The C string must not be overwritten by user programs.
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.\"
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.Sh SEE ALSO
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.Xr ipsec_set_policy 3
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.\"
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.Sh HISTORY
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The
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.Fn ipsec_strerror
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function first appeared in WIDE/KAME IPv6 protocol stack kit.
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.\"
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.Sh BUGS
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The
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.Fn ipsec_strerror
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function will return its result which may be overwritten by subsequent calls.
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.Pp
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.Va ipsec_errcode
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is not thread safe.
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