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121 lines
8.1 KiB
121 lines
8.1 KiB
/* Copyright (C) 2008-2016 Peter Palotas, Jeffrey Jangli, Alexandr Normuradov
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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using Microsoft.Win32.SafeHandles;
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using System;
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using System.Diagnostics.CodeAnalysis;
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using System.Runtime.InteropServices;
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using System.Security;
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namespace Alphaleonis.Win32.Filesystem
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{
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internal static partial class NativeMethods
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{
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/// <summary>The BackupRead function can be used to back up a file or directory, including the security information.
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/// <para>The function reads data associated with a specified file or directory into a buffer,</para>
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/// <para>which can then be written to the backup medium using the WriteFile function.</para>
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/// </summary>
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/// <remarks>
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/// <para>This function is not intended for use in backing up files encrypted under the Encrypted File System.</para>
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/// <para>Use ReadEncryptedFileRaw for that purpose.</para>
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/// <para>Minimum supported client: Windows XP [desktop apps only]</para>
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/// <para>Minimum supported server: Windows Server 2003 [desktop apps only]</para>
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/// </remarks>
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/// <param name="hFile">The file.</param>
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/// <param name="lpBuffer">The buffer.</param>
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/// <param name="nNumberOfBytesToRead">Number of bytes to reads.</param>
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/// <param name="lpNumberOfBytesRead">[out] Number of bytes reads.</param>
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/// <param name="bAbort">true to abort.</param>
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/// <param name="bProcessSecurity">true to process security.</param>
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/// <param name="lpContext">[out] The context.</param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero, indicating that an I/O error occurred. To get extended error information,
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/// call GetLastError.</para>
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/// </returns>
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[SuppressMessage("Microsoft.Security", "CA5122:PInvokesShouldNotBeSafeCriticalFxCopRule")]
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[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode), SuppressUnmanagedCodeSecurity]
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[return: MarshalAs(UnmanagedType.Bool)]
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internal static extern bool BackupRead(SafeFileHandle hFile, SafeGlobalMemoryBufferHandle lpBuffer, [MarshalAs(UnmanagedType.U4)] uint nNumberOfBytesToRead, [MarshalAs(UnmanagedType.U4)] out uint lpNumberOfBytesRead, [MarshalAs(UnmanagedType.Bool)] bool bAbort, [MarshalAs(UnmanagedType.Bool)] bool bProcessSecurity, ref IntPtr lpContext);
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/// <summary>The BackupSeek function seeks forward in a data stream initially accessed by using the <see cref="BackupRead"/> or
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/// <see cref="BackupWrite"/> function.
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/// <para>The function reads data associated with a specified file or directory into a buffer, which can then be written to the backup
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/// medium using the WriteFile function.</para>
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/// </summary>
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/// <remarks>
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/// <para>Applications use the BackupSeek function to skip portions of a data stream that cause errors.</para>
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/// <para>This function does not seek across stream headers. For example, this function cannot be used to skip the stream name.</para>
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/// <para>If an application attempts to seek past the end of a substream, the function fails, the lpdwLowByteSeeked and
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/// lpdwHighByteSeeked parameters</para>
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/// <para>indicate the actual number of bytes the function seeks, and the file position is placed at the start of the next stream
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/// header.</para>
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/// <para> </para>
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/// <para>Minimum supported client: Windows XP [desktop apps only]</para>
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/// <para>Minimum supported server: Windows Server 2003 [desktop apps only]</para>
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/// </remarks>
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/// <param name="hFile">The file.</param>
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/// <param name="dwLowBytesToSeek">The low bytes to seek.</param>
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/// <param name="dwHighBytesToSeek">The high bytes to seek.</param>
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/// <param name="lpdwLowBytesSeeked">[out] The lpdw low bytes seeked.</param>
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/// <param name="lpdwHighBytesSeeked">[out] The lpdw high bytes seeked.</param>
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/// <param name="lpContext">[out] The context.</param>
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/// <returns>
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/// <para>If the function could seek the requested amount, the function returns a nonzero value.</para>
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/// <para>If the function could not seek the requested amount, the function returns zero. To get extended error information, call
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/// GetLastError.</para>
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/// </returns>
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[SuppressMessage("Microsoft.Security", "CA5122:PInvokesShouldNotBeSafeCriticalFxCopRule")]
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[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode), SuppressUnmanagedCodeSecurity]
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[return: MarshalAs(UnmanagedType.Bool)]
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internal static extern bool BackupSeek(SafeFileHandle hFile, [MarshalAs(UnmanagedType.U4)] uint dwLowBytesToSeek, [MarshalAs(UnmanagedType.U4)] uint dwHighBytesToSeek, [MarshalAs(UnmanagedType.U4)] out uint lpdwLowBytesSeeked, [MarshalAs(UnmanagedType.U4)] out uint lpdwHighBytesSeeked, ref IntPtr lpContext);
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/// <summary>The BackupWrite function can be used to restore a file or directory that was backed up using <see cref="BackupRead"/>.
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/// <para>Use the ReadFile function to get a stream of data from the backup medium, then use BackupWrite to write the data to the
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/// specified file or directory.</para>
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/// <para> </para>
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/// </summary>
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/// <remarks>
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/// <para>This function is not intended for use in restoring files encrypted under the Encrypted File System. Use WriteEncryptedFileRaw
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/// for that purpose.</para>
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/// <para>Minimum supported client: Windows XP [desktop apps only]</para>
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/// <para>Minimum supported server: Windows Server 2003 [desktop apps only]</para>
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/// </remarks>
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/// <param name="hFile">The file.</param>
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/// <param name="lpBuffer">The buffer.</param>
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/// <param name="nNumberOfBytesToWrite">Number of bytes to writes.</param>
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/// <param name="lpNumberOfBytesWritten">[out] Number of bytes writtens.</param>
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/// <param name="bAbort">true to abort.</param>
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/// <param name="bProcessSecurity">true to process security.</param>
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/// <param name="lpContext">[out] The context.</param>
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/// <returns>
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/// <para>If the function succeeds, the return value is nonzero.</para>
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/// <para>If the function fails, the return value is zero, indicating that an I/O error occurred. To get extended error information,
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/// call GetLastError.</para>
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/// </returns>
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[SuppressMessage("Microsoft.Security", "CA5122:PInvokesShouldNotBeSafeCriticalFxCopRule")]
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[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode), SuppressUnmanagedCodeSecurity]
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[return: MarshalAs(UnmanagedType.Bool)]
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internal static extern bool BackupWrite(SafeFileHandle hFile, SafeGlobalMemoryBufferHandle lpBuffer, [MarshalAs(UnmanagedType.U4)] uint nNumberOfBytesToWrite, [MarshalAs(UnmanagedType.U4)] out uint lpNumberOfBytesWritten, [MarshalAs(UnmanagedType.Bool)] bool bAbort, [MarshalAs(UnmanagedType.Bool)] bool bProcessSecurity, ref IntPtr lpContext);
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}
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}
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