560 lines
15 KiB
C#
560 lines
15 KiB
C#
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// TarEntry.cs
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//
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// Copyright (C) 2001 Mike Krueger
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either version 2
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// of the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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//
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// Linking this library statically or dynamically with other modules is
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// making a combined work based on this library. Thus, the terms and
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// conditions of the GNU General Public License cover the whole
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// combination.
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//
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// As a special exception, the copyright holders of this library give you
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// permission to link this library with independent modules to produce an
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// executable, regardless of the license terms of these independent
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// modules, and to copy and distribute the resulting executable under
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// terms of your choice, provided that you also meet, for each linked
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// independent module, the terms and conditions of the license of that
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// module. An independent module is a module which is not derived from
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// or based on this library. If you modify this library, you may extend
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// this exception to your version of the library, but you are not
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// obligated to do so. If you do not wish to do so, delete this
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// exception statement from your version.
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using System;
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using System.IO;
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namespace ICSharpCode.SharpZipLib.Tar
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{
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/// <summary>
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/// This class represents an entry in a Tar archive. It consists
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/// of the entry's header, as well as the entry's File. Entries
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/// can be instantiated in one of three ways, depending on how
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/// they are to be used.
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/// <p>
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/// TarEntries that are created from the header bytes read from
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/// an archive are instantiated with the TarEntry( byte[] )
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/// constructor. These entries will be used when extracting from
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/// or listing the contents of an archive. These entries have their
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/// header filled in using the header bytes. They also set the File
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/// to null, since they reference an archive entry not a file.</p>
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/// <p>
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/// TarEntries that are created from files that are to be written
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/// into an archive are instantiated with the CreateEntryFromFile(string)
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/// pseudo constructor. These entries have their header filled in using
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/// the File's information. They also keep a reference to the File
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/// for convenience when writing entries.</p>
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/// <p>
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/// Finally, TarEntries can be constructed from nothing but a name.
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/// This allows the programmer to construct the entry by hand, for
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/// instance when only an InputStream is available for writing to
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/// the archive, and the header information is constructed from
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/// other information. In this case the header fields are set to
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/// defaults and the File is set to null.</p>
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/// <see cref="TarHeader"/>
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/// </summary>
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public class TarEntry : ICloneable
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{
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#region Constructors
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/// <summary>
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/// Initialise a default instance of <see cref="TarEntry"/>.
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/// </summary>
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private TarEntry()
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{
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header = new TarHeader();
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}
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/// <summary>
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/// Construct an entry from an archive's header bytes. File is set
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/// to null.
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/// </summary>
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/// <param name = "headerBuffer">
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/// The header bytes from a tar archive entry.
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/// </param>
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public TarEntry(byte[] headerBuffer)
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{
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header = new TarHeader();
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header.ParseBuffer(headerBuffer);
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}
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/// <summary>
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/// Construct a TarEntry using the <paramref name="header">header</paramref> provided
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/// </summary>
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/// <param name="header">Header details for entry</param>
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public TarEntry(TarHeader header)
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{
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if ( header == null )
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{
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throw new ArgumentNullException("header");
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}
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this.header = (TarHeader)header.Clone();
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}
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#endregion
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#region ICloneable Members
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/// <summary>
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/// Clone this tar entry.
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/// </summary>
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/// <returns>Returns a clone of this entry.</returns>
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public object Clone()
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{
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TarEntry entry = new TarEntry();
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entry.file = file;
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entry.header = (TarHeader)header.Clone();
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entry.Name = Name;
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return entry;
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}
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#endregion
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/// <summary>
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/// Construct an entry with only a <paramref name="name">name</paramref>.
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/// This allows the programmer to construct the entry's header "by hand".
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/// </summary>
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/// <param name="name">The name to use for the entry</param>
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/// <returns>Returns the newly created <see cref="TarEntry"/></returns>
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public static TarEntry CreateTarEntry(string name)
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{
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TarEntry entry = new TarEntry();
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TarEntry.NameTarHeader(entry.header, name);
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return entry;
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}
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/// <summary>
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/// Construct an entry for a file. File is set to file, and the
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/// header is constructed from information from the file.
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/// </summary>
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/// <param name = "fileName">The file name that the entry represents.</param>
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/// <returns>Returns the newly created <see cref="TarEntry"/></returns>
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public static TarEntry CreateEntryFromFile(string fileName)
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{
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TarEntry entry = new TarEntry();
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entry.GetFileTarHeader(entry.header, fileName);
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return entry;
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}
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/// <summary>
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/// Determine if the two entries are equal. Equality is determined
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/// by the header names being equal.
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/// </summary>
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/// <param name="obj">The <see cref="Object"/> to compare with the current Object.</param>
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/// <returns>
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/// True if the entries are equal; false if not.
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/// </returns>
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public override bool Equals(object obj)
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{
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TarEntry localEntry = obj as TarEntry;
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if ( localEntry != null )
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{
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return Name.Equals(localEntry.Name);
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}
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return false;
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}
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/// <summary>
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/// Derive a Hash value for the current <see cref="Object"/>
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/// </summary>
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/// <returns>A Hash code for the current <see cref="Object"/></returns>
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public override int GetHashCode()
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{
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return Name.GetHashCode();
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}
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/// <summary>
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/// Determine if the given entry is a descendant of this entry.
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/// Descendancy is determined by the name of the descendant
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/// starting with this entry's name.
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/// </summary>
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/// <param name = "toTest">
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/// Entry to be checked as a descendent of this.
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/// </param>
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/// <returns>
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/// True if entry is a descendant of this.
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/// </returns>
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public bool IsDescendent(TarEntry toTest)
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{
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if ( toTest == null ) {
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throw new ArgumentNullException("toTest");
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}
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return toTest.Name.StartsWith(Name);
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}
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/// <summary>
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/// Get this entry's header.
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/// </summary>
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/// <returns>
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/// This entry's TarHeader.
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/// </returns>
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public TarHeader TarHeader
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{
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get {
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return header;
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}
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}
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/// <summary>
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/// Get/Set this entry's name.
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/// </summary>
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public string Name
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{
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get {
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return header.Name;
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}
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set {
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header.Name = value;
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}
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}
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/// <summary>
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/// Get/set this entry's user id.
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/// </summary>
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public int UserId
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{
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get {
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return header.UserId;
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}
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set {
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header.UserId = value;
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}
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}
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/// <summary>
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/// Get/set this entry's group id.
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/// </summary>
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public int GroupId
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{
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get {
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return header.GroupId;
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}
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set {
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header.GroupId = value;
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}
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}
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/// <summary>
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/// Get/set this entry's user name.
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/// </summary>
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public string UserName
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{
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get {
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return header.UserName;
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}
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set {
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header.UserName = value;
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}
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}
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/// <summary>
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/// Get/set this entry's group name.
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/// </summary>
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public string GroupName
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{
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get {
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return header.GroupName;
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}
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set {
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header.GroupName = value;
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}
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}
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/// <summary>
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/// Convenience method to set this entry's group and user ids.
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/// </summary>
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/// <param name="userId">
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/// This entry's new user id.
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/// </param>
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/// <param name="groupId">
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/// This entry's new group id.
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/// </param>
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public void SetIds(int userId, int groupId)
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{
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UserId = userId;
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GroupId = groupId;
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}
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/// <summary>
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/// Convenience method to set this entry's group and user names.
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/// </summary>
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/// <param name="userName">
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/// This entry's new user name.
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/// </param>
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/// <param name="groupName">
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/// This entry's new group name.
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/// </param>
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public void SetNames(string userName, string groupName)
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{
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UserName = userName;
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GroupName = groupName;
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}
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/// <summary>
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/// Get/Set the modification time for this entry
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/// </summary>
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public DateTime ModTime {
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get {
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return header.ModTime;
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}
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set {
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header.ModTime = value;
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}
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}
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/// <summary>
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/// Get this entry's file.
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/// </summary>
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/// <returns>
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/// This entry's file.
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/// </returns>
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public string File {
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get {
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return file;
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}
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}
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/// <summary>
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/// Get/set this entry's recorded file size.
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/// </summary>
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public long Size {
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get {
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return header.Size;
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}
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set {
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header.Size = value;
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}
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}
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/// <summary>
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/// Return true if this entry represents a directory, false otherwise
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/// </summary>
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/// <returns>
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/// True if this entry is a directory.
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/// </returns>
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public bool IsDirectory {
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get {
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if (file != null) {
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return Directory.Exists(file);
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}
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if (header != null) {
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if ((header.TypeFlag == TarHeader.LF_DIR) || Name.EndsWith( "/" )) {
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return true;
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}
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}
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return false;
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}
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}
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/// <summary>
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/// Fill in a TarHeader with information from a File.
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/// </summary>
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/// <param name="header">
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/// The TarHeader to fill in.
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/// </param>
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/// <param name="file">
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/// The file from which to get the header information.
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/// </param>
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public void GetFileTarHeader(TarHeader header, string file)
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{
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if ( header == null ) {
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throw new ArgumentNullException("header");
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}
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if ( file == null ) {
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throw new ArgumentNullException("file");
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}
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this.file = file;
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// bugfix from torhovl from #D forum:
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string name = file;
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#if !NETCF_1_0 && !NETCF_2_0
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// 23-Jan-2004 GnuTar allows device names in path where the name is not local to the current directory
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if (name.IndexOf(Environment.CurrentDirectory) == 0) {
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name = name.Substring(Environment.CurrentDirectory.Length);
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}
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#endif
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/*
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if (Path.DirectorySeparatorChar == '\\')
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{
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// check if the OS is Windows
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// Strip off drive letters!
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if (name.Length > 2)
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{
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char ch1 = name[0];
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char ch2 = name[1];
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if (ch2 == ':' && Char.IsLetter(ch1))
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{
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name = name.Substring(2);
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}
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}
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}
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*/
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name = name.Replace(Path.DirectorySeparatorChar, '/');
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|
// No absolute pathnames
|
||
|
|
// Windows (and Posix?) paths can start with UNC style "\\NetworkDrive\",
|
||
|
|
// so we loop on starting /'s.
|
||
|
|
while (name.StartsWith("/")) {
|
||
|
|
name = name.Substring(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
header.LinkName = String.Empty;
|
||
|
|
header.Name = name;
|
||
|
|
|
||
|
|
if (Directory.Exists(file)) {
|
||
|
|
header.Mode = 1003; // Magic number for security access for a UNIX filesystem
|
||
|
|
header.TypeFlag = TarHeader.LF_DIR;
|
||
|
|
if ( (header.Name.Length == 0) || header.Name[header.Name.Length - 1] != '/') {
|
||
|
|
header.Name = header.Name + "/";
|
||
|
|
}
|
||
|
|
|
||
|
|
header.Size = 0;
|
||
|
|
} else {
|
||
|
|
header.Mode = 33216; // Magic number for security access for a UNIX filesystem
|
||
|
|
header.TypeFlag = TarHeader.LF_NORMAL;
|
||
|
|
header.Size = new FileInfo(file.Replace('/', Path.DirectorySeparatorChar)).Length;
|
||
|
|
}
|
||
|
|
|
||
|
|
header.ModTime = System.IO.File.GetLastWriteTime(file.Replace('/', Path.DirectorySeparatorChar)).ToUniversalTime();
|
||
|
|
header.DevMajor = 0;
|
||
|
|
header.DevMinor = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Get entries for all files present in this entries directory.
|
||
|
|
/// If this entry doesnt represent a directory zero entries are returned.
|
||
|
|
/// </summary>
|
||
|
|
/// <returns>
|
||
|
|
/// An array of TarEntry's for this entry's children.
|
||
|
|
/// </returns>
|
||
|
|
public TarEntry[] GetDirectoryEntries()
|
||
|
|
{
|
||
|
|
if ( (file == null) || !Directory.Exists(file)) {
|
||
|
|
return new TarEntry[0];
|
||
|
|
}
|
||
|
|
|
||
|
|
string[] list = Directory.GetFileSystemEntries(file);
|
||
|
|
TarEntry[] result = new TarEntry[list.Length];
|
||
|
|
|
||
|
|
for (int i = 0; i < list.Length; ++i) {
|
||
|
|
result[i] = TarEntry.CreateEntryFromFile(list[i]);
|
||
|
|
}
|
||
|
|
|
||
|
|
return result;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Write an entry's header information to a header buffer.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name = "outBuffer">
|
||
|
|
/// The tar entry header buffer to fill in.
|
||
|
|
/// </param>
|
||
|
|
public void WriteEntryHeader(byte[] outBuffer)
|
||
|
|
{
|
||
|
|
header.WriteHeader(outBuffer);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Convenience method that will modify an entry's name directly
|
||
|
|
/// in place in an entry header buffer byte array.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="buffer">
|
||
|
|
/// The buffer containing the entry header to modify.
|
||
|
|
/// </param>
|
||
|
|
/// <param name="newName">
|
||
|
|
/// The new name to place into the header buffer.
|
||
|
|
/// </param>
|
||
|
|
static public void AdjustEntryName(byte[] buffer, string newName)
|
||
|
|
{
|
||
|
|
TarHeader.GetNameBytes(newName, buffer, 0, TarHeader.NAMELEN);
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Fill in a TarHeader given only the entry's name.
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="header">
|
||
|
|
/// The TarHeader to fill in.
|
||
|
|
/// </param>
|
||
|
|
/// <param name="name">
|
||
|
|
/// The tar entry name.
|
||
|
|
/// </param>
|
||
|
|
static public void NameTarHeader(TarHeader header, string name)
|
||
|
|
{
|
||
|
|
if ( header == null ) {
|
||
|
|
throw new ArgumentNullException("header");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ( name == null ) {
|
||
|
|
throw new ArgumentNullException("name");
|
||
|
|
}
|
||
|
|
|
||
|
|
bool isDir = name.EndsWith("/");
|
||
|
|
|
||
|
|
header.Name = name;
|
||
|
|
header.Mode = isDir ? 1003 : 33216;
|
||
|
|
header.UserId = 0;
|
||
|
|
header.GroupId = 0;
|
||
|
|
header.Size = 0;
|
||
|
|
|
||
|
|
header.ModTime = DateTime.UtcNow;
|
||
|
|
|
||
|
|
header.TypeFlag = isDir ? TarHeader.LF_DIR : TarHeader.LF_NORMAL;
|
||
|
|
|
||
|
|
header.LinkName = String.Empty;
|
||
|
|
header.UserName = String.Empty;
|
||
|
|
header.GroupName = String.Empty;
|
||
|
|
|
||
|
|
header.DevMajor = 0;
|
||
|
|
header.DevMinor = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
#region Instance Fields
|
||
|
|
/// <summary>
|
||
|
|
/// The name of the file this entry represents or null if the entry is not based on a file.
|
||
|
|
/// </summary>
|
||
|
|
string file;
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// The entry's header information.
|
||
|
|
/// </summary>
|
||
|
|
TarHeader header;
|
||
|
|
#endregion
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
/* The original Java file had this header:
|
||
|
|
*
|
||
|
|
** Authored by Timothy Gerard Endres
|
||
|
|
** <mailto:time@gjt.org> <http://www.trustice.com>
|
||
|
|
**
|
||
|
|
** This work has been placed into the public domain.
|
||
|
|
** You may use this work in any way and for any purpose you wish.
|
||
|
|
**
|
||
|
|
** THIS SOFTWARE IS PROVIDED AS-IS WITHOUT WARRANTY OF ANY KIND,
|
||
|
|
** NOT EVEN THE IMPLIED WARRANTY OF MERCHANTABILITY. THE AUTHOR
|
||
|
|
** OF THIS SOFTWARE, ASSUMES _NO_ RESPONSIBILITY FOR ANY
|
||
|
|
** CONSEQUENCE RESULTING FROM THE USE, MODIFICATION, OR
|
||
|
|
** REDISTRIBUTION OF THIS SOFTWARE.
|
||
|
|
**
|
||
|
|
*/
|