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Diffstat (limited to 'include/iprt/dir.h')
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diff --git a/include/iprt/dir.h b/include/iprt/dir.h new file mode 100644 index 00000000..ff47c974 --- /dev/null +++ b/include/iprt/dir.h @@ -0,0 +1,894 @@ +/** @file + * IPRT - Directory Manipulation. + */ + +/* + * Copyright (C) 2006-2022 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_dir_h +#define IPRT_INCLUDED_dir_h +#ifndef RT_WITHOUT_PRAGMA_ONCE +# pragma once +#endif + +#include <iprt/cdefs.h> +#include <iprt/types.h> +#include <iprt/fs.h> +#include <iprt/symlink.h> + + +RT_C_DECLS_BEGIN + +/** @defgroup grp_rt_dir RTDir - Directory Manipulation + * @ingroup grp_rt + * @{ + */ + +/** + * Check for the existence of a directory. + * + * All symbolic links will be attemped resolved. If that is undesirable, please + * use RTPathQueryInfo instead. + * + * @returns true if exist and is a directory. + * @returns false if not exists or isn't a directory. + * @param pszPath Path to the directory. + */ +RTDECL(bool) RTDirExists(const char *pszPath); + +/** @name RTDirCreate flags. + * @{ */ +/** Don't allow symbolic links as part of the path. + * @remarks this flag is currently not implemented and will be ignored. */ +#define RTDIRCREATE_FLAGS_NO_SYMLINKS RT_BIT(0) +/** Set the not-content-indexed flag (default). Windows only atm. */ +#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_DONT_SET RT_BIT(1) +/** Do not set the not-content-indexed flag. Windows only atm. */ +#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_SET UINT32_C(0) +/** Ignore errors setting the not-content-indexed flag. Windows only atm. */ +#define RTDIRCREATE_FLAGS_NOT_CONTENT_INDEXED_NOT_CRITICAL RT_BIT(2) +/** Ignore umask when applying the mode. */ +#define RTDIRCREATE_FLAGS_IGNORE_UMASK RT_BIT(3) +/** Valid mask. */ +#define RTDIRCREATE_FLAGS_VALID_MASK UINT32_C(0x0000000f) +/** @} */ + +/** + * Creates a directory. + * + * @returns iprt status code. + * @param pszPath Path to the directory to create. + * @param fMode The mode of the new directory. + * @param fCreate Create flags, RTDIRCREATE_FLAGS_*. + */ +RTDECL(int) RTDirCreate(const char *pszPath, RTFMODE fMode, uint32_t fCreate); + +/** + * Creates a directory including all non-existing parent directories. + * + * @returns iprt status code. + * @param pszPath Path to the directory to create. + * @param fMode The mode of the new directories. + */ +RTDECL(int) RTDirCreateFullPath(const char *pszPath, RTFMODE fMode); + +/** + * Creates a directory including all non-existing parent directories. + * + * @returns iprt status code. + * @param pszPath Path to the directory to create. + * @param fMode The mode of the new directories. + * @param fFlags Create flags, RTDIRCREATE_FLAGS_*. + */ +RTDECL(int) RTDirCreateFullPathEx(const char *pszPath, RTFMODE fMode, uint32_t fFlags); + +/** + * Creates a new directory with a unique name using the given template. + * + * One or more trailing X'es in the template will be replaced by random alpha + * numeric characters until a RTDirCreate succeeds or we run out of patience. + * For instance: + * "/tmp/myprog-XXXXXX" + * + * As an alternative to trailing X'es, it + * is possible to put 3 or more X'es somewhere inside the directory name. In + * the following string only the last bunch of X'es will be modified: + * "/tmp/myprog-XXX-XXX.tmp" + * + * @returns iprt status code. + * @param pszTemplate The directory name template on input. The actual + * directory name on success. Empty string on failure. + * @param fMode The mode to create the directory with. Use 0700 + * unless you have reason not to. + */ +RTDECL(int) RTDirCreateTemp(char *pszTemplate, RTFMODE fMode); + +/** + * Secure version of @a RTDirCreateTemp with a fixed mode of 0700. + * + * This function behaves in the same way as @a RTDirCreateTemp with two + * additional points. Firstly the mode is fixed to 0700. Secondly it will + * fail if it is not possible to perform the operation securely. Possible + * reasons include that the directory could be removed by another unprivileged + * user before it is used (e.g. if is created in a non-sticky /tmp directory) + * or that the path contains symbolic links which another unprivileged user + * could manipulate; however the exact criteria will be specified on a + * platform-by-platform basis as platform support is added. + * @see RTPathIsSecure for the current list of criteria. + * @returns iprt status code. + * @returns VERR_NOT_SUPPORTED if the interface can not be supported on the + * current platform at this time. + * @returns VERR_INSECURE if the directory could not be created securely. + * @param pszTemplate The directory name template on input. The + * actual directory name on success. Empty string + * on failure. + */ +RTDECL(int) RTDirCreateTempSecure(char *pszTemplate); + +/** + * Creates a new directory with a unique name by appending a number. + * + * This API differs from RTDirCreateTemp & RTDirCreateTempSecure in that it + * first tries to create the directory without any random bits, thus the best + * case result will be prettier. It also differs in that it does not take a + * template, but is instead given a template description, and will only use + * digits for the filling. + * + * For sake of convenience and debugging , the current implementation + * starts at 0 and will increment sequentally for a while before switching to + * random numbers. + * + * On success @a pszPath contains the path created. + * + * @returns iprt status code. + * @param pszPath The path to the directory. On input the base template + * name. On successful return, the unique directory we + * created. + * @param cbSize The size of the pszPath buffer. Needs enough space for + * holding the digits and the optional separator. + * @param fMode The mode of the new directory. + * @param cchDigits How many digits should the number have (zero padded). + * @param chSep The separator used between the path and the number. Can + * be zero. (optional) + */ +RTDECL(int) RTDirCreateUniqueNumbered(char *pszPath, size_t cbSize, RTFMODE fMode, size_t cchDigits, char chSep); + +/** + * Removes a directory if empty. + * + * @returns iprt status code. + * @param pszPath Path to the directory to remove. + */ +RTDECL(int) RTDirRemove(const char *pszPath); + +/** + * Removes a directory tree recursively. + * + * @returns iprt status code. + * @param pszPath Path to the directory to remove recursively. + * @param fFlags Flags, see RTDIRRMREC_F_XXX. + * + * @remarks This will not work on a root directory. + */ +RTDECL(int) RTDirRemoveRecursive(const char *pszPath, uint32_t fFlags); + +/** @name RTDirRemoveRecursive flags. + * @{ */ +/** Delete the content of the directory and the directory itself. */ +#define RTDIRRMREC_F_CONTENT_AND_DIR UINT32_C(0) +/** Only delete the content of the directory, omit the directory it self. */ +#define RTDIRRMREC_F_CONTENT_ONLY RT_BIT_32(0) +/** Long path hack: Don't apply RTPathAbs to the path. */ +#define RTDIRRMREC_F_NO_ABS_PATH RT_BIT_32(1) +/** Mask of valid flags. */ +#define RTDIRRMREC_F_VALID_MASK UINT32_C(0x00000003) +/** @} */ + +/** + * Flushes the specified directory. + * + * This API is not implemented on all systems. On some systems it may be + * unnecessary if you've already flushed the file. If you really care for your + * data and is entering dangerous territories, it doesn't hurt calling it after + * flushing and closing the file. + * + * @returns IPRT status code. + * @retval VERR_NOT_IMPLEMENTED must be expected. + * @retval VERR_NOT_SUPPORTED must be expected. + * @param pszPath Path to the directory. + */ +RTDECL(int) RTDirFlush(const char *pszPath); + +/** + * Flushes the parent directory of the specified file. + * + * This is just a wrapper around RTDirFlush. + * + * @returns IPRT status code, see RTDirFlush for details. + * @param pszChild Path to the file which parent should be flushed. + */ +RTDECL(int) RTDirFlushParent(const char *pszChild); + + + +/** + * Filter option for RTDirOpenFiltered(). + */ +typedef enum RTDIRFILTER +{ + /** The usual invalid 0 entry. */ + RTDIRFILTER_INVALID = 0, + /** No filter should be applied (and none was specified). */ + RTDIRFILTER_NONE, + /** The Windows NT filter. + * The following wildcard chars: *, ?, <, > and " + * The matching is done on the uppercased strings. */ + RTDIRFILTER_WINNT, + /** The UNIX filter. + * The following wildcard chars: *, ?, [..] + * The matching is done on exact case. */ + RTDIRFILTER_UNIX, + /** The UNIX filter, uppercased matching. + * Same as RTDIRFILTER_UNIX except that the strings are uppercased before comparing. */ + RTDIRFILTER_UNIX_UPCASED, + + /** The usual full 32-bit value. */ + RTDIRFILTER_32BIT_HACK = 0x7fffffff +} RTDIRFILTER; + + +/** + * Directory entry type. + * + * This is the RTFS_TYPE_MASK stuff shifted down 12 bits and + * identical to the BSD/LINUX ABI. See RTFS_TYPE_DIRENTRYTYPE_SHIFT. + */ +typedef enum RTDIRENTRYTYPE +{ + /** Unknown type (DT_UNKNOWN). */ + RTDIRENTRYTYPE_UNKNOWN = 0, + /** Named pipe (fifo) (DT_FIFO). */ + RTDIRENTRYTYPE_FIFO = 001, + /** Character device (DT_CHR). */ + RTDIRENTRYTYPE_DEV_CHAR = 002, + /** Directory (DT_DIR). */ + RTDIRENTRYTYPE_DIRECTORY = 004, + /** Block device (DT_BLK). */ + RTDIRENTRYTYPE_DEV_BLOCK = 006, + /** Regular file (DT_REG). */ + RTDIRENTRYTYPE_FILE = 010, + /** Symbolic link (DT_LNK). */ + RTDIRENTRYTYPE_SYMLINK = 012, + /** Socket (DT_SOCK). */ + RTDIRENTRYTYPE_SOCKET = 014, + /** Whiteout (DT_WHT). */ + RTDIRENTRYTYPE_WHITEOUT = 016 +} RTDIRENTRYTYPE; + + +/** + * Directory entry. + * + * This is inspired by the POSIX interfaces. + */ +#pragma pack(1) +typedef struct RTDIRENTRY +{ + /** The unique identifier (within the file system) of this file system object (d_ino). + * + * Together with INodeIdDevice, this field can be used as a OS wide unique id + * when both their values are not 0. This field is 0 if the information is not + * available. */ + RTINODE INodeId; + /** The entry type. (d_type) + * + * @warning RTDIRENTRYTYPE_UNKNOWN is a common return value here since not all + * file systems (or Unixes) stores the type of a directory entry and + * instead expects the user to use stat() to get it. So, when you see + * this you should use RTDirQueryUnknownType or RTDirQueryUnknownTypeEx + * to get the type, or if if you're lazy, use RTDirReadEx. + */ + RTDIRENTRYTYPE enmType; + /** The length of the filename, excluding the terminating nul character. */ + uint16_t cbName; + /** The filename. (no path) + * Using the pcbDirEntry parameter of RTDirRead makes this field variable in size. */ + char szName[260]; +} RTDIRENTRY; +#pragma pack() +/** Pointer to a directory entry. */ +typedef RTDIRENTRY *PRTDIRENTRY; +/** Pointer to a const directory entry. */ +typedef RTDIRENTRY const *PCRTDIRENTRY; + + +/** + * Directory entry with extended information. + * + * This is inspired by the PC interfaces. + */ +#pragma pack(1) +typedef struct RTDIRENTRYEX +{ + /** Full information about the object. */ + RTFSOBJINFO Info; + /** The length of the short field (number of RTUTF16 entries (not chars)). + * It is 16-bit for reasons of alignment. */ + uint16_t cwcShortName; + /** The short name for 8.3 compatibility. + * Empty string if not available. + * Since the length is a bit tricky for a UTF-8 encoded name, and since this + * is practically speaking only a windows thing, it is encoded as UCS-2. */ + RTUTF16 wszShortName[14]; + /** The length of the filename. */ + uint16_t cbName; + /** The filename. (no path) + * Using the pcbDirEntry parameter of RTDirReadEx makes this field variable in size. */ + char szName[260]; +} RTDIRENTRYEX; +#pragma pack() +/** Pointer to a directory entry. */ +typedef RTDIRENTRYEX *PRTDIRENTRYEX; +/** Pointer to a const directory entry. */ +typedef RTDIRENTRYEX const *PCRTDIRENTRYEX; + + +/** + * Opens a directory. + * + * @returns iprt status code. + * @param phDir Where to store the open directory handle. + * @param pszPath Path to the directory to open. + */ +RTDECL(int) RTDirOpen(RTDIR *phDir, const char *pszPath); + +/** @name RTDIR_F_XXX - RTDirOpenFiltered flags. + * @{ */ +/** Don't allow symbolic links as part of the path. + * @remarks this flag is currently not implemented and will be ignored. */ +#define RTDIR_F_NO_SYMLINKS RT_BIT_32(0) +/** Deny relative opening of anything above this directory. */ +#define RTDIR_F_DENY_ASCENT RT_BIT_32(1) +/** Don't follow symbolic links in the final component. */ +#define RTDIR_F_NO_FOLLOW RT_BIT_32(2) +/** Long path hack: Don't apply RTPathAbs to the path. */ +#define RTDIR_F_NO_ABS_PATH RT_BIT_32(3) +/** Valid flag mask. */ +#define RTDIR_F_VALID_MASK UINT32_C(0x0000000f) +/** @} */ + +/** + * Opens a directory with flags and optional filtering. + * + * @returns IPRT status code. + * @retval VERR_IS_A_SYMLINK if RTDIR_F_NO_FOLLOW is set, @a enmFilter is + * RTDIRFILTER_NONE and @a pszPath points to a symbolic link and does + * not end with a slash. Note that on Windows this does not apply to + * file symlinks, only directory symlinks, for the file variant + * VERR_NOT_A_DIRECTORY will be returned. + * + * @param phDir Where to store the open directory handle. + * @param pszPath Path to the directory to search, this must include wildcards. + * @param enmFilter The kind of filter to apply. Setting this to RTDIRFILTER_NONE makes + * this function behave like RTDirOpen. + * @param fFlags Open flags, RTDIR_F_XXX. + * + */ +RTDECL(int) RTDirOpenFiltered(RTDIR *phDir, const char *pszPath, RTDIRFILTER enmFilter, uint32_t fFlags); + +/** + * Closes a directory. + * + * @returns iprt status code. + * @param hDir Handle to open directory returned by RTDirOpen() or + * RTDirOpenFiltered(). + */ +RTDECL(int) RTDirClose(RTDIR hDir); + +/** + * Checks if the supplied directory handle is valid. + * + * @returns true if valid. + * @returns false if invalid. + * @param hDir The directory handle. + */ +RTDECL(bool) RTDirIsValid(RTDIR hDir); + +/** + * Reads the next entry in the directory. + * + * @returns VINF_SUCCESS and data in pDirEntry on success. + * @returns VERR_NO_MORE_FILES when the end of the directory has been reached. + * @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If + * pcbDirEntry is specified it will be updated with the required buffer size. + * @returns suitable iprt status code on other errors. + * + * @param hDir Handle to the open directory. + * @param pDirEntry Where to store the information about the next + * directory entry on success. + * @param pcbDirEntry Optional parameter used for variable buffer size. + * + * On input the variable pointed to contains the size of the pDirEntry + * structure. This must be at least OFFSET(RTDIRENTRY, szName[2]) bytes. + * + * On successful output the field is updated to + * OFFSET(RTDIRENTRY, szName[pDirEntry->cbName + 1]). + * + * When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is + * returned, this field contains the required buffer size. + * + * The value is unchanged in all other cases. + */ +RTDECL(int) RTDirRead(RTDIR hDir, PRTDIRENTRY pDirEntry, size_t *pcbDirEntry); + +/** + * Reads the next entry in the directory returning extended information. + * + * @returns VINF_SUCCESS and data in pDirEntry on success. + * @returns VERR_NO_MORE_FILES when the end of the directory has been reached. + * @returns VERR_BUFFER_OVERFLOW if the buffer is too small to contain the filename. If + * pcbDirEntry is specified it will be updated with the required buffer size. + * @returns suitable iprt status code on other errors. + * + * @param hDir Handle to the open directory. + * @param pDirEntry Where to store the information about the next + * directory entry on success. + * @param pcbDirEntry Optional parameter used for variable buffer size. + * + * On input the variable pointed to contains the size of the pDirEntry + * structure. This must be at least OFFSET(RTDIRENTRYEX, szName[2]) bytes. + * + * On successful output the field is updated to + * OFFSET(RTDIRENTRYEX, szName[pDirEntry->cbName + 1]). + * + * When the data doesn't fit in the buffer and VERR_BUFFER_OVERFLOW is + * returned, this field contains the required buffer size. + * + * The value is unchanged in all other cases. + * @param enmAdditionalAttribs + * Which set of additional attributes to request. + * Use RTFSOBJATTRADD_NOTHING if this doesn't matter. + * @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK. + */ +RTDECL(int) RTDirReadEx(RTDIR hDir, PRTDIRENTRYEX pDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAdditionalAttribs, uint32_t fFlags); + +/** + * Wrapper around RTDirReadEx that does the directory entry buffer handling. + * + * Call RTDirReadExAFree to free the buffers allocated by this function. + * + * @returns IPRT status code, see RTDirReadEx() for details. + * + * @param hDir Handle to the open directory. + * @param ppDirEntry Pointer to the directory entry pointer. Initialize this + * to NULL before the first call. + * @param pcbDirEntry Where the API caches the allocation size. Set this to + * zero before the first call. + * @param enmAddAttr See RTDirReadEx. + * @param fFlags See RTDirReadEx. + */ +RTDECL(int) RTDirReadExA(RTDIR hDir, PRTDIRENTRYEX *ppDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAddAttr, uint32_t fFlags); + +/** + * Frees the buffer allocated by RTDirReadExA. + * + * @param ppDirEntry Pointer to the directory entry pointer. + * @param pcbDirEntry Where the API caches the allocation size. + */ +RTDECL(void) RTDirReadExAFree(PRTDIRENTRYEX *ppDirEntry, size_t *pcbDirEntry); + +/** + * Resolves RTDIRENTRYTYPE_UNKNOWN values returned by RTDirRead. + * + * @returns IPRT status code (see RTPathQueryInfo). + * @param pszComposedName The path to the directory entry. The caller must + * compose this, it's NOT sufficient to pass + * RTDIRENTRY::szName! + * @param fFollowSymlinks Whether to follow symbolic links or not. + * @param penmType Pointer to the RTDIRENTRY::enmType member. If this + * is not RTDIRENTRYTYPE_UNKNOWN and, if + * @a fFollowSymlinks is false, not + * RTDIRENTRYTYPE_SYMLINK, the function will return + * immediately without doing anything. Otherwise it + * will use RTPathQueryInfo to try figure out the + * correct value. On failure, this will be unchanged. + */ +RTDECL(int) RTDirQueryUnknownType(const char *pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE *penmType); + +/** + * Resolves RTDIRENTRYTYPE_UNKNOWN values returned by RTDirRead, extended + * version. + * + * @returns IPRT status code (see RTPathQueryInfo). + * @param pszComposedName The path to the directory entry. The caller must + * compose this, it's NOT sufficient to pass + * RTDIRENTRY::szName! + * @param fFollowSymlinks Whether to follow symbolic links or not. + * @param penmType Pointer to the RTDIRENTRY::enmType member or + * similar. Will NOT be checked on input. + * @param pObjInfo The object info buffer to use with RTPathQueryInfo. + */ +RTDECL(int) RTDirQueryUnknownTypeEx(const char *pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE *penmType, PRTFSOBJINFO pObjInfo); + +/** + * Checks if the directory entry returned by RTDirRead is '.', '..' or similar. + * + * @returns true / false. + * @param pDirEntry The directory entry to check. + */ +RTDECL(bool) RTDirEntryIsStdDotLink(PRTDIRENTRY pDirEntry); + +/** + * Checks if the directory entry returned by RTDirReadEx is '.', '..' or + * similar. + * + * @returns true / false. + * @param pDirEntryEx The extended directory entry to check. + */ +RTDECL(bool) RTDirEntryExIsStdDotLink(PCRTDIRENTRYEX pDirEntryEx); + +/** + * Rewind and restart the directory reading. + * + * @returns IRPT status code. + * @param hDir The directory handle to rewind. + */ +RTDECL(int) RTDirRewind(RTDIR hDir); + +/** + * Renames a file. + * + * Identical to RTPathRename except that it will ensure that the source is a directory. + * + * @returns IPRT status code. + * @returns VERR_ALREADY_EXISTS if the destination file exists. + * + * @param pszSrc The path to the source file. + * @param pszDst The path to the destination file. + * This file will be created. + * @param fRename See RTPathRename. + */ +RTDECL(int) RTDirRename(const char *pszSrc, const char *pszDst, unsigned fRename); + + +/** + * Query information about an open directory. + * + * @returns iprt status code. + * + * @param hDir Handle to the open directory. + * @param pObjInfo Object information structure to be filled on successful return. + * @param enmAdditionalAttribs Which set of additional attributes to request. + * Use RTFSOBJATTRADD_NOTHING if this doesn't matter. + */ +RTR3DECL(int) RTDirQueryInfo(RTDIR hDir, PRTFSOBJINFO pObjInfo, RTFSOBJATTRADD enmAdditionalAttribs); + + +/** + * Changes one or more of the timestamps associated of file system object. + * + * @returns iprt status code. + * @returns VERR_NOT_SUPPORTED is returned if the operation isn't supported by the OS. + * + * @param hDir Handle to the open directory. + * @param pAccessTime Pointer to the new access time. NULL if not to be changed. + * @param pModificationTime Pointer to the new modifcation time. NULL if not to be changed. + * @param pChangeTime Pointer to the new change time. NULL if not to be changed. + * @param pBirthTime Pointer to the new time of birth. NULL if not to be changed. + * + * @remark The file system might not implement all these time attributes, + * the API will ignore the ones which aren't supported. + * + * @remark The file system might not implement the time resolution + * employed by this interface, the time will be chopped to fit. + * + * @remark The file system may update the change time even if it's + * not specified. + * + * @remark POSIX can only set Access & Modification and will always set both. + */ +RTR3DECL(int) RTDirSetTimes(RTDIR hDir, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime, + PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime); + + +/** + * Changes the mode flags of an open directory. + * + * The API requires at least one of the mode flag sets (Unix/Dos) to + * be set. The type is ignored. + * + * @returns iprt status code. + * @param hDir Handle to the open directory. + * @param fMode The new file mode, see @ref grp_rt_fs for details. + */ +RTDECL(int) RTDirSetMode(RTDIR hDir, RTFMODE fMode); + + +/** @defgroup grp_rt_dir_rel Directory relative APIs + * + * This group of APIs allows working with paths that are relative to an open + * directory, therebye eliminating some classic path related race conditions on + * systems with native support for these kinds of operations. + * + * On NT (Windows) there is native support for addressing files, directories and + * stuff _below_ the open directory. It is not possible to go upwards + * (hDir:../../grandparent), at least not with NTFS, forcing us to use the + * directory path as a fallback and opening us to potential races. + * + * On most unix-like systems here is now native support for all of this. + * + * @{ */ + +/** + * Open a file relative to @a hDir. + * + * @returns IPRT status code. + * @param hDir The directory to open relative to. + * @param pszRelFilename The relative path to the file. + * @param fOpen Open flags, i.e a combination of the RTFILE_O_XXX + * defines. The ACCESS, ACTION and DENY flags are + * mandatory! + * @param phFile Where to store the handle to the opened file. + * + * @sa RTFileOpen + */ +RTDECL(int) RTDirRelFileOpen(RTDIR hDir, const char *pszRelFilename, uint64_t fOpen, PRTFILE phFile); + + + +/** + * Opens a directory relative to @a hDir. + * + * @returns IPRT status code. + * @param hDir The directory to open relative to. + * @param pszDir The relative path to the directory to open. + * @param phDir Where to store the directory handle. + * + * @sa RTDirOpen + */ +RTDECL(int) RTDirRelDirOpen(RTDIR hDir, const char *pszDir, RTDIR *phDir); + +/** + * Opens a directory relative to @a hDir, with flags and optional filtering. + * + * @returns IPRT status code. + * @retval VERR_IS_A_SYMLINK if RTDIR_F_NO_FOLLOW is set, @a enmFilter is + * RTDIRFILTER_NONE and @a pszPath points to a symbolic link and does + * not end with a slash. Note that on Windows this does not apply to + * file symlinks, only directory symlinks, for the file variant + * VERR_NOT_A_DIRECTORY will be returned. + * + * @param hDir The directory to open relative to. + * @param pszDirAndFilter The relative path to the directory to search, this + * must include wildcards. + * @param enmFilter The kind of filter to apply. Setting this to + * RTDIRFILTER_NONE makes this function behave like + * RTDirOpen. + * @param fFlags Open flags, RTDIR_F_XXX. + * @param phDir Where to store the directory handle. + * + * @sa RTDirOpenFiltered + */ +RTDECL(int) RTDirRelDirOpenFiltered(RTDIR hDir, const char *pszDirAndFilter, RTDIRFILTER enmFilter, + uint32_t fFlags, RTDIR *phDir); + +/** + * Creates a directory relative to @a hDir. + * + * @returns IPRT status code. + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the directory to create. + * @param fMode The mode of the new directory. + * @param fCreate Create flags, RTDIRCREATE_FLAGS_XXX. + * @param phSubDir Where to return the handle of the created directory. + * Optional. + * + * @sa RTDirCreate + */ +RTDECL(int) RTDirRelDirCreate(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fCreate, RTDIR *phSubDir); + +/** + * Removes a directory relative to @a hDir if empty. + * + * @returns IPRT status code. + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the directory to remove. + * + * @sa RTDirRemove + */ +RTDECL(int) RTDirRelDirRemove(RTDIR hDir, const char *pszRelPath); + + +/** + * Query information about a file system object relative to @a hDir. + * + * @returns IPRT status code. + * @retval VINF_SUCCESS if the object exists, information returned. + * @retval VERR_PATH_NOT_FOUND if any but the last component in the specified + * path was not found or was not a directory. + * @retval VERR_FILE_NOT_FOUND if the object does not exist (but path to the + * parent directory exists). + * + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the file system object. + * @param pObjInfo Object information structure to be filled on successful + * return. + * @param enmAddAttr Which set of additional attributes to request. + * Use RTFSOBJATTRADD_NOTHING if this doesn't matter. + * @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK. + * + * @sa RTPathQueryInfoEx + */ +RTDECL(int) RTDirRelPathQueryInfo(RTDIR hDir, const char *pszRelPath, PRTFSOBJINFO pObjInfo, + RTFSOBJATTRADD enmAddAttr, uint32_t fFlags); + +/** + * Changes the mode flags of a file system object relative to @a hDir. + * + * The API requires at least one of the mode flag sets (Unix/Dos) to + * be set. The type is ignored. + * + * @returns IPRT status code. + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the file system object. + * @param fMode The new file mode, see @ref grp_rt_fs for details. + * @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK. + * + * @sa RTPathSetMode + */ +RTDECL(int) RTDirRelPathSetMode(RTDIR hDir, const char *pszRelPath, RTFMODE fMode, uint32_t fFlags); + +/** + * Changes one or more of the timestamps associated of file system object + * relative to @a hDir. + * + * @returns IPRT status code. + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the file system object. + * @param pAccessTime Pointer to the new access time. + * @param pModificationTime Pointer to the new modification time. + * @param pChangeTime Pointer to the new change time. NULL if not to be changed. + * @param pBirthTime Pointer to the new time of birth. NULL if not to be changed. + * @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK. + * + * @remark The file system might not implement all these time attributes, + * the API will ignore the ones which aren't supported. + * + * @remark The file system might not implement the time resolution + * employed by this interface, the time will be chopped to fit. + * + * @remark The file system may update the change time even if it's + * not specified. + * + * @remark POSIX can only set Access & Modification and will always set both. + * + * @sa RTPathSetTimesEx + */ +RTDECL(int) RTDirRelPathSetTimes(RTDIR hDir, const char *pszRelPath, PCRTTIMESPEC pAccessTime, PCRTTIMESPEC pModificationTime, + PCRTTIMESPEC pChangeTime, PCRTTIMESPEC pBirthTime, uint32_t fFlags); + +/** + * Changes the owner and/or group of a file system object relative to @a hDir. + * + * @returns IPRT status code. + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the file system object. + * @param uid The new file owner user id. Pass NIL_RTUID to leave + * this unchanged. + * @param gid The new group id. Pass NIL_RTGID to leave this + * unchanged. + * @param fFlags RTPATH_F_ON_LINK or RTPATH_F_FOLLOW_LINK. + * + * @sa RTPathSetOwnerEx + */ +RTDECL(int) RTDirRelPathSetOwner(RTDIR hDir, const char *pszRelPath, uint32_t uid, uint32_t gid, uint32_t fFlags); + +/** + * Renames a directory relative path within a filesystem. + * + * This will rename symbolic links. If RTPATHRENAME_FLAGS_REPLACE is used and + * pszDst is a symbolic link, it will be replaced and not its target. + * + * @returns IPRT status code. + * @param hDirSrc The directory the source path is relative to. + * @param pszSrc The source path, relative to @a hDirSrc. + * @param hDirDst The directory the destination path is relative to. + * @param pszDst The destination path, relative to @a hDirDst. + * @param fRename Rename flags, RTPATHRENAME_FLAGS_XXX. + * + * @sa RTPathRename + */ +RTDECL(int) RTDirRelPathRename(RTDIR hDirSrc, const char *pszSrc, RTDIR hDirDst, const char *pszDst, unsigned fRename); + +/** + * Removes the last component of the directory relative path. + * + * @returns IPRT status code. + * @param hDir The directory @a pszRelPath is relative to. + * @param pszRelPath The relative path to the file system object. + * @param fUnlink Unlink flags, RTPATHUNLINK_FLAGS_XXX. + * + * @sa RTPathUnlink + */ +RTDECL(int) RTDirRelPathUnlink(RTDIR hDir, const char *pszRelPath, uint32_t fUnlink); + + + +/** + * Creates a symbolic link (@a pszSymlink) relative to @a hDir targeting @a + * pszTarget. + * + * @returns IPRT status code. + * @param hDir The directory @a pszSymlink is relative to. + * @param pszSymlink The relative path 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_XXX. + * + * @sa RTSymlinkCreate + */ +RTDECL(int) RTDirRelSymlinkCreate(RTDIR hDir, const char *pszSymlink, const char *pszTarget, + RTSYMLINKTYPE enmType, uint32_t fCreate); + +/** + * Read the symlink target relative to @a hDir. + * + * @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 hDir The directory @a pszSymlink is relative to. + * @param pszSymlink The relative path to 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_XXX. + * + * @sa RTSymlinkRead + */ +RTDECL(int) RTDirRelSymlinkRead(RTDIR hDir, const char *pszSymlink, char *pszTarget, size_t cbTarget, uint32_t fRead); + +/** @} */ + + +/** @} */ + +RT_C_DECLS_END + +#endif /* !IPRT_INCLUDED_dir_h */ + |