149 lines
4.9 KiB
Groff
149 lines
4.9 KiB
Groff
.\" Copyright (c) 2003-2007 Tim Kientzle
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.\" Copyright (c) 2010 Joerg Sonnenberger
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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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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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.\" $FreeBSD: src/lib/libarchive/archive_entry.3,v 1.18 2008/05/26 17:00:22 kientzle Exp $
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.\"
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.Dd Feburary 22, 2010
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.Dt archive_entry 3
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.Os
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.Sh NAME
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.Nm archive_entry_clear ,
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.Nm archive_entry_clone ,
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.Nm archive_entry_free ,
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.Nm archive_entry_new ,
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.Nd functions for managing archive entry descriptions
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.Sh SYNOPSIS
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.In archive_entry.h
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.Ft "struct archive_entry *"
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.Fn archive_entry_clear "struct archive_entry *"
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.Ft struct archive_entry *
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.Fn archive_entry_clone "struct archive_entry *"
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.Ft void
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.Fn archive_entry_free "struct archive_entry *"
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.Ft struct archive_entry *
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.Fn archive_entry_new "void"
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.Sh DESCRIPTION
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These functions create and manipulate data objects that
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represent entries within an archive.
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You can think of a
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.Tn struct archive_entry
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as a heavy-duty version of
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.Tn struct stat :
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it includes everything from
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.Tn struct stat
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plus associated pathname, textual group and user names, etc.
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These objects are used by
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.Xr libarchive 3
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to represent the metadata associated with a particular
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entry in an archive.
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.Ss Create and Destroy
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There are functions to allocate, destroy, clear, and copy
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.Va archive_entry
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objects:
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.Bl -tag -compact -width indent
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.It Fn archive_entry_clear
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Erases the object, resetting all internal fields to the
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same state as a newly-created object.
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This is provided to allow you to quickly recycle objects
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without thrashing the heap.
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.It Fn archive_entry_clone
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A deep copy operation; all text fields are duplicated.
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.It Fn archive_entry_free
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Releases the
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.Tn struct archive_entry
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object.
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.It Fn archive_entry_new
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Allocate and return a blank
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.Tn struct archive_entry
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object.
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.El
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.Ss Function groups
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Due to high number of functions, the accessor functions can be found in
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man pages grouped by the purpose.
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.Bl -tag -width ".Xr archive_entry_perms 3"
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.It Xr archive_entry_acl 3
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Access Control List manipulation
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.It Xr archive_entry_paths 3
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Path name manipulation
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.It Xr archive_entry_perms 3
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User, group and mode manipulation
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.It Xr archive_entry_stat 3
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Functions not in the other groups and copying to/from
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.Vt struct stat .
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.It Xr archive_entry_time 3
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Time field manipulation
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.El
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.Pp
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Most of the functions set or read entries in an object.
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Such functions have one of the following forms:
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.Bl -tag -compact -width indent
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.It Fn archive_entry_set_XXXX
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Stores the provided data in the object.
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In particular, for strings, the pointer is stored,
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not the referenced string.
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.It Fn archive_entry_copy_XXXX
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As above, except that the referenced data is copied
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into the object.
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.It Fn archive_entry_XXXX
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Returns the specified data.
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In the case of strings, a const-qualified pointer to
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the string is returned.
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.El
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String data can be set or accessed as wide character strings
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or normal
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.Va char
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strings.
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The functions that use wide character strings are suffixed with
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.Cm _w .
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Note that these are different representations of the same data:
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For example, if you store a narrow string and read the corresponding
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wide string, the object will transparently convert formats
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using the current locale.
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Similarly, if you store a wide string and then store a
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narrow string for the same data, the previously-set wide string will
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be discarded in favor of the new data.
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.Pp
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.\" .Sh EXAMPLE
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.\" .Sh RETURN VALUES
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.\" .Sh ERRORS
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.Sh SEE ALSO
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.Xr archive 3 ,
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.Xr archive_entry_acl 3 ,
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.Xr archive_entry_paths 3 ,
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.Xr archive_entry_perms 3 ,
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.Xr archive_entry_time 3
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.Sh HISTORY
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The
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.Nm libarchive
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library first appeared in
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.Fx 5.3 .
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.Sh AUTHORS
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.An -nosplit
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The
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.Nm libarchive
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library was written by
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.An Tim Kientzle Aq kientzle@acm.org .
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.\" .Sh BUGS
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