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-.\" Copyright (c) 1994
-.\"	The Regents of the University of California.  All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Jan-Simon Pendry.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\"    must display the following acknowledgement:
-.\"	This product includes software developed by the University of
-.\"	California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\"     @(#)realpath.3	8.2 (Berkeley) 2/16/94
-.\" $FreeBSD: src/lib/libc/stdlib/realpath.3,v 1.13 2003/03/27 20:48:53 fjoe Exp $
-.\"
-.Dd February 16, 1994
-.Dt REALPATH 3
-.Os
-.Sh NAME
-.Nm realpath
-.Nd returns the canonicalized absolute pathname
-.Sh LIBRARY
-.Lb libc
-.Sh SYNOPSIS
-.In stdlib.h
-.Ft "char *"
-.Fo realpath
-.Fa "const char *restrict file_name"
-.Fa "char *restrict resolved_name"
-.Fc
-.Sh DESCRIPTION
-The
-.Fn realpath
-function resolves all symbolic links, extra
-.Dq /
-characters, and references to
-.Pa /./
-and
-.Pa /../
-in
-.Fa file_name ,
-and copies the resulting absolute pathname into
-the memory referenced by
-.Fa resolved_name .
-The
-.Fa resolved_name
-argument
-.Em must
-refer to a buffer capable of storing at least
-.Dv PATH_MAX
-characters.
-.Pp
-The
-.Fn realpath
-function will resolve both absolute and relative paths
-and return the absolute pathname corresponding to
-.Fa file_name .
-All components of
-.Fa file_name
-must exist when
-.Fn realpath
-is called.
-.Sh "RETURN VALUES"
-The
-.Fn realpath
-function returns
-.Fa resolved_name
-on success.
-If an error occurs,
-.Fn realpath
-returns
-.Dv NULL
-and
-.Fa resolved_name
-contains the pathname which caused the problem.
-.Sh ERRORS
-The function
-.Fn realpath
-may fail and set the external variable
-.Va errno
-for any of the errors specified for the library functions
-.Xr lstat 2 ,
-.Xr readlink 2 ,
-and
-.Xr getcwd 3 .
-.Sh CAVEATS
-This implementation of
-.Fn realpath
-differs slightly from the Solaris implementation.
-The
-.Bx 4.4
-version always returns absolute pathnames,
-whereas the Solaris implementation will,
-under certain circumstances, return a relative
-.Fa resolved_name
-when given a relative
-.Fa file_name .
-.Sh LEGACY SYNOPSIS
-.Fd #include <sys/param.h>
-.Fd #include <stdlib.h>
-.Pp
-The include file
-.In sys/param.h
-is necessary.
-.Sh LEGACY DESCRIPTION
-In legacy mode,
-the last component of
-.Fa file_name
-does not need to exist when
-.Fn realpath
-is called.
-.Sh "SEE ALSO"
-.Xr getcwd 3 ,
-.Xr compat 5
-.Sh HISTORY
-The
-.Fn realpath
-function first appeared in
-.Bx 4.4 .