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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:17:27 +0000
commitf215e02bf85f68d3a6106c2a1f4f7f063f819064 (patch)
tree6bb5b92c046312c4e95ac2620b10ddf482d3fa8b /include/iprt/symlink.h
parentInitial commit. (diff)
downloadvirtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.tar.xz
virtualbox-f215e02bf85f68d3a6106c2a1f4f7f063f819064.zip
Adding upstream version 7.0.14-dfsg.upstream/7.0.14-dfsg
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'include/iprt/symlink.h')
-rw-r--r--include/iprt/symlink.h189
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+/** @file
+ * IPRT - Symbolic Link Manipulation.
+ */
+
+/*
+ * Copyright (C) 2010-2023 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_symlink_h
+#define IPRT_INCLUDED_symlink_h
+#ifndef RT_WITHOUT_PRAGMA_ONCE
+# pragma once
+#endif
+
+#include <iprt/cdefs.h>
+#include <iprt/types.h>
+
+
+
+RT_C_DECLS_BEGIN
+
+/** @defgroup grp_rt_symlink RTSymlink - Symbolic Link Manipulation
+ * @ingroup grp_rt
+ *
+ * For querying and changing symlink info (mode, ownership, etc) please refer
+ * to the @ref grp_rt_path "RTPath" API: RTPathQueryInfoEx, RTPathSetOwnerEx,
+ * RTPathSetModeEx and RTPathSetTimesEx.
+ *
+ * @{
+ */
+
+/**
+ * Checks if the specified path exists and is a symlink.
+ *
+ * @returns true if it's a symlink, false if it isn't.
+ * @param pszSymlink The path to the symlink.
+ *
+ * @sa RTDirExists, RTPathExists, RTSymlinkExists.
+ */
+RTDECL(bool) RTSymlinkExists(const char *pszSymlink);
+
+/**
+ * Checks if this is a dangling link or not.
+ *
+ * If the target of @a pszSymlink is a symbolic link, this may return false if
+ * that or any subsequent links are dangling.
+ *
+ * @returns true if it's dangling, false if it isn't.
+ * @param pszSymlink The path to the symlink.
+ */
+RTDECL(bool) RTSymlinkIsDangling(const char *pszSymlink);
+
+/**
+ * RTSymlinkCreate link type argument.
+ */
+typedef enum RTSYMLINKTYPE
+{
+ /** Invalid value. */
+ RTSYMLINKTYPE_INVALID = 0,
+ /** The link targets a directory. */
+ RTSYMLINKTYPE_DIR,
+ /** The link targets a file (or whatever else). */
+ RTSYMLINKTYPE_FILE,
+ /** It is not known what is being targeted.
+ * @remarks The RTSymlinkCreate API may probe the target to try figure
+ * out what is being targeted. */
+ RTSYMLINKTYPE_UNKNOWN,
+ /** The end of the valid type values. */
+ RTSYMLINKTYPE_END,
+ /** Blow the type up to 32-bit. */
+ RTSYMLINKTYPE_32BIT_HACK = 0x7fffffff
+} RTSYMLINKTYPE;
+
+/** @name RTSymlinkCreate flags.
+ * @{ */
+/** Don't allow symbolic links as part of the path.
+ * @remarks this flag is currently not implemented and will be ignored. */
+#define RTSYMLINKCREATE_FLAGS_NO_SYMLINKS RT_BIT(0)
+/** @} */
+
+/**
+ * Creates a symbolic link (@a pszSymlink) targeting @a pszTarget.
+ *
+ * @returns IPRT status code.
+ *
+ * @param pszSymlink The name of the symbolic link.
+ * @param pszTarget The path to the symbolic link target. This is
+ * relative to @a pszSymlink or an absolute path.
+ * @param enmType The symbolic link type. For Windows compatability
+ * it is very important to set this correctly. When
+ * RTSYMLINKTYPE_UNKNOWN is used, the API will try
+ * make a guess and may attempt query information
+ * about @a pszTarget in the process.
+ * @param fCreate Create flags, RTSYMLINKCREATE_FLAGS_*.
+ */
+RTDECL(int) RTSymlinkCreate(const char *pszSymlink, const char *pszTarget,
+ RTSYMLINKTYPE enmType, uint32_t fCreate);
+
+/** @name RTSymlinkDelete flags.
+ * @{ */
+/** Don't allow symbolic links as part of the path.
+ * @remarks this flag is currently not implemented and will be ignored. */
+#define RTSYMLINKDELETE_FLAGS_NO_SYMLINKS RT_BIT(0)
+/** @} */
+
+/**
+ * Deletes the specified symbolic link.
+ *
+ * This will try to refuse deleting non-symlinks, however there are usually
+ * races in the implementation of this check so no guarantees can be are made.
+ *
+ * @returns IPRT status code.
+ * @retval VERR_NOT_SYMLINK if @a pszSymlink does not specify a symbolic link.
+ *
+ * @param pszSymlink The symbolic link that should be removed.
+ * @param fDelete Delete flags, RTSYMLINKDELETE_FLAGS_*.
+ */
+RTDECL(int) RTSymlinkDelete(const char *pszSymlink, uint32_t fDelete);
+
+/** @name RTSymlinkRead flags.
+ * @{ */
+/** Don't allow symbolic links as part of the path.
+ * @remarks this flag is currently not implemented and will be ignored. */
+#define RTSYMLINKREAD_FLAGS_NO_SYMLINKS RT_BIT(0)
+/** @} */
+
+/**
+ * Read the symlink target.
+ *
+ * @returns IPRT status code.
+ * @retval VERR_NOT_SYMLINK if @a pszSymlink does not specify a symbolic link.
+ * @retval VERR_BUFFER_OVERFLOW if the link is larger than @a cbTarget. The
+ * buffer will contain what all we managed to read, fully terminated
+ * if @a cbTarget > 0.
+ *
+ * @param pszSymlink The symbolic link that should be read.
+ * @param pszTarget The target buffer.
+ * @param cbTarget The size of the target buffer.
+ * @param fRead Read flags, RTSYMLINKREAD_FLAGS_*.
+ */
+RTDECL(int) RTSymlinkRead(const char *pszSymlink, char *pszTarget, size_t cbTarget, uint32_t fRead);
+
+/**
+ * Read the symlink target into an API allocated buffer.
+ *
+ * This API eliminates the race involved in determining the right buffer size.
+ *
+ * @returns IPRT status code.
+ * @retval VERR_NOT_SYMLINK if @a pszSymlink does not specify a symbolic link.
+ *
+ * @param pszSymlink The symbolic link that should be read.
+ * @param ppszTarget Where to return the target string. Free the string
+ * by calling RTStrFree.
+ */
+RTDECL(int) RTSymlinkReadA(const char *pszSymlink, char **ppszTarget);
+
+/** @} */
+
+RT_C_DECLS_END
+
+#endif /* !IPRT_INCLUDED_symlink_h */
+