1ab3783e1a
bottom of the manpages and order them consistently. GNU groff doesn't care about the ordering, and doesn't even mention CAVEATS and SECURITY CONSIDERATIONS as common sections and where to put them. Found by: mdocml lint run Reviewed by: ru
136 lines
3.6 KiB
Groff
136 lines
3.6 KiB
Groff
.\" Copyright (c) 1994
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Jan-Simon Pendry.
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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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.\" 4. Neither the name of the University 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 REGENTS 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 REGENTS 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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.\" @(#)realpath.3 8.2 (Berkeley) 2/16/94
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.\" $FreeBSD$
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.\"
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.Dd April 19, 2010
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.Dt REALPATH 3
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.Os
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.Sh NAME
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.Nm realpath
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.Nd returns the canonicalized absolute pathname
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/param.h
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.In stdlib.h
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.Ft "char *"
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.Fn realpath "const char *pathname" "char *resolved_path"
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.Sh DESCRIPTION
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The
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.Fn realpath
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function resolves all symbolic links, extra
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.Dq /
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characters and references to
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.Pa /./
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and
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.Pa /../
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in
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.Fa pathname ,
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and copies the resulting absolute pathname into
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the memory pointed to by
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.Fa resolved_path .
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The
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.Fa resolved_path
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argument
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.Em must
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point to a buffer capable of storing at least
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.Dv PATH_MAX
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characters, or be
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.Dv NULL .
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.Pp
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The
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.Fn realpath
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function will resolve both absolute and relative paths
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and return the absolute pathname corresponding to
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.Fa pathname .
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All but the last component of
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.Fa pathname
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must exist when
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.Fn realpath
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is called.
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.Sh "RETURN VALUES"
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The
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.Fn realpath
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function returns
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.Fa resolved_path
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on success.
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If the function was supplied
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.Dv NULL
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as
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.Fa resolved_path ,
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and operation did not cause errors, the returned value is
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a null-terminated string in a buffer allocated by a call to
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.Fn malloc 3 .
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If an error occurs,
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.Fn realpath
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returns
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.Dv NULL ,
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and if
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.Fa resolved_path
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is not
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.Dv NULL ,
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the array that it points to contains the pathname which caused the problem.
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.Sh ERRORS
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The function
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.Fn realpath
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may fail and set the external variable
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.Va errno
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for any of the errors specified for the library functions
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.Xr lstat 2 ,
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.Xr readlink 2
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and
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.Xr getcwd 3 .
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.Sh SEE ALSO
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.Xr getcwd 3
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.Sh STANDARDS
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The
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.Fn realpath
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function conforms to
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.St -p1003.1-2001 .
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.Sh HISTORY
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The
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.Fn realpath
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function first appeared in
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.Bx 4.4 .
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.Sh CAVEATS
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This implementation of
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.Fn realpath
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differs slightly from the Solaris implementation.
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The
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.Bx 4.4
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version always returns absolute pathnames,
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whereas the Solaris implementation will,
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under certain circumstances, return a relative
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.Fa resolved_path
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when given a relative
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.Fa pathname .
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