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+/** @file
+ * IPRT - Tar archive I/O.
+ */
+
+/*
+ * Copyright (C) 2009-2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+#ifndef IPRT_INCLUDED_tar_h
+#define IPRT_INCLUDED_tar_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/types.h>
+#include <iprt/time.h>
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_rt_tar RTTar - Tar archive I/O
+ * @ingroup grp_rt
+ *
+ * @deprecated Only used for legacy code and writing. Migrate new code to the
+ * VFS interface, add the write part when needed.
+ *
+ * @{
+ */
+
+/** A tar handle */
+typedef R3PTRTYPE(struct RTTARINTERNAL *) RTTAR;
+/** Pointer to a RTTAR interface handle. */
+typedef RTTAR *PRTTAR;
+/** Nil RTTAR interface handle. */
+#define NIL_RTTAR ((RTTAR)0)
+
+/** A tar file handle */
+typedef R3PTRTYPE(struct RTTARFILEINTERNAL *) RTTARFILE;
+/** Pointer to a RTTARFILE interface handle. */
+typedef RTTARFILE *PRTTARFILE;
+/** Nil RTTARFILE interface handle. */
+#define NIL_RTTARFILE ((RTTARFILE)0)
+
+/** Maximum length of a tar filename, excluding the terminating '\0'. More
+ * does not fit into a tar record. */
+#define RTTAR_NAME_MAX 99
+
+/**
+ * Creates a Tar archive.
+ *
+ * Use the mask to specify the access type.
+ *
+ * @returns IPRT status code.
+ *
+ * @param phTar Where to store the RTTAR handle.
+ * @param pszTarname The file name of the tar archive to create. Should
+ * not exist.
+ * @param fMode Open flags, i.e a combination of the RTFILE_O_* defines.
+ * The ACCESS, ACTION and DENY flags are mandatory!
+ */
+RTR3DECL(int) RTTarOpen(PRTTAR phTar, const char *pszTarname, uint32_t fMode);
+
+/**
+ * Close the Tar archive.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hTar Handle to the RTTAR interface.
+ */
+RTR3DECL(int) RTTarClose(RTTAR hTar);
+
+/**
+ * Open a file in the Tar archive.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hTar The handle of the tar archive.
+ * @param phFile Where to store the handle to the opened file.
+ * @param pszFilename Path to the file which is to be opened. (UTF-8)
+ * @param fOpen Open flags, i.e a combination of the RTFILE_O_* defines.
+ * The ACCESS, ACTION flags are mandatory! DENY flags
+ * are currently not supported.
+ *
+ * @remarks Write mode means append mode only. It is not possible to make
+ * changes to existing files.
+ *
+ * @remarks Currently it is not possible to open more than one file in write
+ * mode. Although open more than one file in read only mode (even when
+ * one file is opened in write mode) is always possible.
+ */
+RTR3DECL(int) RTTarFileOpen(RTTAR hTar, PRTTARFILE phFile, const char *pszFilename, uint32_t fOpen);
+
+/**
+ * Close the file opened by RTTarFileOpen.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hFile The file handle to close.
+ */
+RTR3DECL(int) RTTarFileClose(RTTARFILE hFile);
+
+/**
+ * Read bytes from a file at a given offset.
+ * This function may modify the file position.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hFile Handle to the file.
+ * @param off Where to read.
+ * @param pvBuf Where to put the bytes we read.
+ * @param cbToRead How much to read.
+ * @param pcbRead Where to return how much we actually read. If NULL
+ * an error will be returned for a partial read.
+ */
+RTR3DECL(int) RTTarFileReadAt(RTTARFILE hFile, uint64_t off, void *pvBuf, size_t cbToRead, size_t *pcbRead);
+
+/**
+ * Write bytes to a file at a given offset.
+ * This function may modify the file position.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hFile Handle to the file.
+ * @param off Where to write.
+ * @param pvBuf What to write.
+ * @param cbToWrite How much to write.
+ * @param pcbWritten Where to return how much we actually wrote. If NULL
+ * an error will be returned for a partial write.
+ */
+RTR3DECL(int) RTTarFileWriteAt(RTTARFILE hFile, uint64_t off, const void *pvBuf, size_t cbToWrite, size_t *pcbWritten);
+
+/**
+ * Query the size of the file.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hFile Handle to the file.
+ * @param pcbSize Where to store the filesize.
+ */
+RTR3DECL(int) RTTarFileGetSize(RTTARFILE hFile, uint64_t *pcbSize);
+
+/**
+ * Set the size of the file.
+ *
+ * @returns IPRT status code.
+ *
+ * @param hFile Handle to the file.
+ * @param cbSize The new file size.
+ */
+RTR3DECL(int) RTTarFileSetSize(RTTARFILE hFile, uint64_t cbSize);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_tar_h */
+