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Diffstat (limited to '')
| -rw-r--r-- | src/VBox/Runtime/r3/dir.cpp | 866 |
1 files changed, 866 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/dir.cpp b/src/VBox/Runtime/r3/dir.cpp new file mode 100644 index 00000000..67d29682 --- /dev/null +++ b/src/VBox/Runtime/r3/dir.cpp @@ -0,0 +1,866 @@ +/* $Id: dir.cpp $ */ +/** @file + * IPRT - Directory Manipulation, Part 1. + */ + +/* + * Copyright (C) 2006-2019 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE 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. + */ + + +/********************************************************************************************************************************* +* Header Files * +*********************************************************************************************************************************/ +#define LOG_GROUP RTLOGGROUP_DIR +#include <iprt/dir.h> +#include "internal/iprt.h" + +#include <iprt/assert.h> +#include <iprt/file.h> +#include <iprt/err.h> +#include <iprt/log.h> +#include <iprt/mem.h> +#include <iprt/param.h> +#include <iprt/path.h> +#include <iprt/string.h> +#include <iprt/uni.h> +#define RTDIR_AGNOSTIC +#include "internal/dir.h" +#include "internal/path.h" + + +static DECLCALLBACK(bool) rtDirFilterWinNtMatch(PRTDIRINTERNAL pDir, const char *pszName); +static DECLCALLBACK(bool) rtDirFilterWinNtMatchNoWildcards(PRTDIRINTERNAL pDir, const char *pszName); +DECLINLINE(bool) rtDirFilterWinNtMatchEon(PCRTUNICP puszFilter); +static bool rtDirFilterWinNtMatchDosStar(unsigned iDepth, RTUNICP uc, const char *pszNext, PCRTUNICP puszFilter); +static bool rtDirFilterWinNtMatchStar(unsigned iDepth, RTUNICP uc, const char *pszNext, PCRTUNICP puszFilter); +static bool rtDirFilterWinNtMatchBase(unsigned iDepth, const char *pszName, PCRTUNICP puszFilter); + + + +RTDECL(int) RTDirCreateFullPath(const char *pszPath, RTFMODE fMode) +{ + /* + * Resolve the path. + */ + char szAbsPath[RTPATH_MAX]; + int rc = RTPathAbs(pszPath, szAbsPath, sizeof(szAbsPath)); + if (RT_FAILURE(rc)) + return rc; + + /* + * Iterate the path components making sure each of them exists. + */ + /* skip volume name */ + char *psz = &szAbsPath[rtPathVolumeSpecLen(szAbsPath)]; + + /* skip the root slash if any */ + if ( psz[0] == '/' +#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2) + || psz[0] == '\\' +#endif + ) + psz++; + + /* iterate over path components. */ + do + { + /* the next component is NULL, stop iterating */ + if (!*psz) + break; +#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2) + psz = strpbrk(psz, "\\/"); +#else + psz = strchr(psz, '/'); +#endif + if (psz) + *psz = '\0'; + /* + * ASSUME that RTDirCreate will return VERR_ALREADY_EXISTS and not VERR_ACCESS_DENIED in those cases + * where the directory exists but we don't have write access to the parent directory. + */ + rc = RTDirCreate(szAbsPath, fMode, 0); + if (rc == VERR_ALREADY_EXISTS) + rc = VINF_SUCCESS; + if (!psz) + break; + *psz++ = RTPATH_DELIMITER; + } while (RT_SUCCESS(rc)); + + return rc; +} + + +/** + * Filter a the filename in the against a filter. + * + * @returns true if the name matches the filter. + * @returns false if the name doesn't match filter. + * @param pDir The directory handle. + * @param pszName The path to match to the filter. + */ +static DECLCALLBACK(bool) rtDirFilterWinNtMatchNoWildcards(PRTDIRINTERNAL pDir, const char *pszName) +{ + /* + * Walk the string and compare. + */ + PCRTUNICP pucFilter = pDir->puszFilter; + const char *psz = pszName; + RTUNICP uc; + do + { + int rc = RTStrGetCpEx(&psz, &uc); + AssertRCReturn(rc, false); + RTUNICP ucFilter = *pucFilter++; + if ( uc != ucFilter + && RTUniCpToUpper(uc) != ucFilter) + return false; + } while (uc); + return true; +} + + +/** + * Matches end of name. + */ +DECLINLINE(bool) rtDirFilterWinNtMatchEon(PCRTUNICP puszFilter) +{ + RTUNICP ucFilter; + while ( (ucFilter = *puszFilter) == '>' + || ucFilter == '<' + || ucFilter == '*' + || ucFilter == '"') + puszFilter++; + return !ucFilter; +} + + +/** + * Recursive star matching. + * Practically the same as normal star, except that the dos star stops + * when hitting the last dot. + * + * @returns true on match. + * @returns false on miss. + */ +static bool rtDirFilterWinNtMatchDosStar(unsigned iDepth, RTUNICP uc, const char *pszNext, PCRTUNICP puszFilter) +{ + AssertReturn(iDepth++ < 256, false); + + /* + * If there is no dos star, we should work just like the NT star. + * Since that's generally faster algorithms, we jump down to there if we can. + */ + const char *pszDosDot = strrchr(pszNext, '.'); + if (!pszDosDot && uc == '.') + pszDosDot = pszNext - 1; + if (!pszDosDot) + return rtDirFilterWinNtMatchStar(iDepth, uc, pszNext, puszFilter); + + /* + * Inspect the next filter char(s) until we find something to work on. + */ + RTUNICP ucFilter = *puszFilter++; + switch (ucFilter) + { + /* + * The star expression is the last in the pattern. + * We're fine if the name ends with a dot. + */ + case '\0': + return !pszDosDot[1]; + + /* + * Simplified by brute force. + */ + case '>': /* dos question mark */ + case '?': + case '*': + case '<': /* dos star */ + case '"': /* dos dot */ + { + puszFilter--; + const char *pszStart = pszNext; + do + { + if (rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter)) + return true; + int rc = RTStrGetCpEx(&pszNext, &uc); AssertRCReturn(rc, false); + } while ((intptr_t)pszDosDot - (intptr_t)pszNext >= -1); + + /* backtrack and do the current char. */ + pszNext = RTStrPrevCp(NULL, pszStart); AssertReturn(pszNext, false); + return rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter); + } + + /* + * Ok, we've got zero or more characters. + * We'll try match starting at each occurrence of this character. + */ + default: + { + if ( RTUniCpToUpper(uc) == ucFilter + && rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter)) + return true; + do + { + int rc = RTStrGetCpEx(&pszNext, &uc); AssertRCReturn(rc, false); + if ( RTUniCpToUpper(uc) == ucFilter + && rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter)) + return true; + } while ((intptr_t)pszDosDot - (intptr_t)pszNext >= -1); + return false; + } + } + /* won't ever get here! */ +} + + +/** + * Recursive star matching. + * + * @returns true on match. + * @returns false on miss. + */ +static bool rtDirFilterWinNtMatchStar(unsigned iDepth, RTUNICP uc, const char *pszNext, PCRTUNICP puszFilter) +{ + AssertReturn(iDepth++ < 256, false); + + /* + * Inspect the next filter char(s) until we find something to work on. + */ + for (;;) + { + RTUNICP ucFilter = *puszFilter++; + switch (ucFilter) + { + /* + * The star expression is the last in the pattern. + * Cool, that means we're done! + */ + case '\0': + return true; + + /* + * Just in case (doubt we ever get here), just merge it with the current one. + */ + case '*': + break; + + /* + * Skip a fixed number of chars. + * Figure out how many by walking the filter ignoring '*'s. + */ + case '?': + { + unsigned cQms = 1; + while ((ucFilter = *puszFilter) == '*' || ucFilter == '?') + { + cQms += ucFilter == '?'; + puszFilter++; + } + do + { + if (!uc) + return false; + int rc = RTStrGetCpEx(&pszNext, &uc); AssertRCReturn(rc, false); + } while (--cQms > 0); + /* done? */ + if (!ucFilter) + return true; + break; + } + + /* + * The simple way is to try char by char and match the remaining + * expression. If it's trailing we're done. + */ + case '>': /* dos question mark */ + { + if (rtDirFilterWinNtMatchEon(puszFilter)) + return true; + const char *pszStart = pszNext; + do + { + if (rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter)) + return true; + int rc = RTStrGetCpEx(&pszNext, &uc); AssertRCReturn(rc, false); + } while (uc); + + /* backtrack and do the current char. */ + pszNext = RTStrPrevCp(NULL, pszStart); AssertReturn(pszNext, false); + return rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter); + } + + /* + * This bugger is interesting. + * Time for brute force. Iterate the name char by char. + */ + case '<': + { + do + { + if (rtDirFilterWinNtMatchDosStar(iDepth, uc, pszNext, puszFilter)) + return true; + int rc = RTStrGetCpEx(&pszNext, &uc); AssertRCReturn(rc, false); + } while (uc); + return false; + } + + /* + * This guy matches a '.' or the end of the name. + * It's very simple if the rest of the filter expression also matches eon. + */ + case '"': + if (rtDirFilterWinNtMatchEon(puszFilter)) + return true; + ucFilter = '.'; + RT_FALL_THRU(); + + /* + * Ok, we've got zero or more characters. + * We'll try match starting at each occurrence of this character. + */ + default: + { + do + { + if ( RTUniCpToUpper(uc) == ucFilter + && rtDirFilterWinNtMatchBase(iDepth, pszNext, puszFilter)) + return true; + int rc = RTStrGetCpEx(&pszNext, &uc); AssertRCReturn(rc, false); + } while (uc); + return false; + } + } + } /* for (;;) */ + + /* won't ever get here! */ +} + + +/** + * Filter a the filename in the against a filter. + * + * The rules are as follows: + * '?' Matches exactly one char. + * '*' Matches zero or more chars. + * '<' The dos star, matches zero or more chars except the DOS dot. + * '>' The dos question mark, matches one char, but dots and end-of-name eats them. + * '"' The dos dot, matches a dot or end-of-name. + * + * @returns true if the name matches the filter. + * @returns false if the name doesn't match filter. + * @param iDepth The recursion depth. + * @param pszName The path to match to the filter. + * @param puszFilter The filter string. + */ +static bool rtDirFilterWinNtMatchBase(unsigned iDepth, const char *pszName, PCRTUNICP puszFilter) +{ + AssertReturn(iDepth++ < 256, false); + + /* + * Walk the string and match it up char by char. + */ + RTUNICP uc; + do + { + RTUNICP ucFilter = *puszFilter++; + int rc = RTStrGetCpEx(&pszName, &uc); AssertRCReturn(rc, false); + switch (ucFilter) + { + /* Exactly one char. */ + case '?': + if (!uc) + return false; + break; + + /* One char, but the dos dot and end-of-name eats '>' and '<'. */ + case '>': /* dos ? */ + if (!uc) + return rtDirFilterWinNtMatchEon(puszFilter); + if (uc == '.') + { + while ((ucFilter = *puszFilter) == '>' || ucFilter == '<') + puszFilter++; + if (ucFilter == '"' || ucFilter == '.') /* not 100% sure about the last dot */ + ++puszFilter; + else /* the does question mark doesn't match '.'s, so backtrack. */ + pszName = RTStrPrevCp(NULL, pszName); + } + break; + + /* Match a dot or the end-of-name. */ + case '"': /* dos '.' */ + if (uc != '.') + { + if (uc) + return false; + return rtDirFilterWinNtMatchEon(puszFilter); + } + break; + + /* zero or more */ + case '*': + return rtDirFilterWinNtMatchStar(iDepth, uc, pszName, puszFilter); + case '<': /* dos '*' */ + return rtDirFilterWinNtMatchDosStar(iDepth, uc, pszName, puszFilter); + + + /* uppercased match */ + default: + { + if (RTUniCpToUpper(uc) != ucFilter) + return false; + break; + } + } + } while (uc); + + return true; +} + + +/** + * Filter a the filename in the against a filter. + * + * @returns true if the name matches the filter. + * @returns false if the name doesn't match filter. + * @param pDir The directory handle. + * @param pszName The path to match to the filter. + */ +static DECLCALLBACK(bool) rtDirFilterWinNtMatch(PRTDIRINTERNAL pDir, const char *pszName) +{ + return rtDirFilterWinNtMatchBase(0, pszName, pDir->puszFilter); +} + + +/** + * Initializes a WinNt like wildcard filter. + * + * @returns Pointer to the filter function. + * @returns NULL if the filter doesn't filter out anything. + * @param pDir The directory handle (not yet opened). + */ +static PFNRTDIRFILTER rtDirFilterWinNtInit(PRTDIRINTERNAL pDir) +{ + /* + * Check for the usual * and <"< (*.* in DOS language) patterns. + */ + if ( (pDir->cchFilter == 1 && pDir->pszFilter[0] == '*') + || (pDir->cchFilter == 3 && !memcmp(pDir->pszFilter, "<\".>", 3)) + ) + return NULL; + + /* + * Uppercase the expression, also do a little optimizations when possible. + */ + bool fHaveWildcards = false; + unsigned iRead = 0; + unsigned iWrite = 0; + while (iRead < pDir->cucFilter) + { + RTUNICP uc = pDir->puszFilter[iRead++]; + if (uc == '*') + { + fHaveWildcards = true; + /* remove extra stars. */ + RTUNICP uc2; + while ((uc2 = pDir->puszFilter[iRead + 1]) == '*') + iRead++; + } + else if (uc == '?' || uc == '>' || uc == '<' || uc == '"') + fHaveWildcards = true; + else + uc = RTUniCpToUpper(uc); + pDir->puszFilter[iWrite++] = uc; + } + pDir->puszFilter[iWrite] = 0; + pDir->cucFilter = iWrite; + + return fHaveWildcards + ? rtDirFilterWinNtMatch + : rtDirFilterWinNtMatchNoWildcards; +} + + +/** + * Common worker for opening a directory. + * + * @returns IPRT status code. + * @param phDir Where to store the directory handle. + * @param pszPath The specified path. + * @param pszFilter Pointer to where the filter start in the path. + * NULL if no filter. + * @param enmFilter The type of filter to apply. + * @param fFlags RTDIR_F_XXX. + * @param hRelativeDir The directory @a pvNativeRelative is relative + * to, ~(uintptr_t)0 if absolute. + * @param pvNativeRelative The native relative path. NULL if absolute or + * we're to use (consume) hRelativeDir. + */ +static int rtDirOpenCommon(RTDIR *phDir, const char *pszPath, const char *pszFilter, RTDIRFILTER enmFilter, + uint32_t fFlags, uintptr_t hRelativeDir, void *pvNativeRelative) +{ + /* + * Expand the path. + * + * The purpose of this exercise to have the abs path around + * for querying extra information about the objects we list. + * As a sideeffect we also validate the path here. + */ + char szRealPath[RTPATH_MAX + 1]; + int rc; + size_t cbFilter; /* includes '\0' (thus cb and not cch). */ + size_t cucFilter0; /* includes U+0. */ + bool fDirSlash = false; + if (!pszFilter) + { + /* Note! RTPathAbs currently strips trailing slashes, so we have + to inspect pszPath to figure it out. */ + if (*pszPath != '\0') + { + const char *pszLast = strchr(pszPath, '\0') - 1; + if (RTPATH_IS_SLASH(*pszLast)) + fDirSlash = true; + } + + cbFilter = cucFilter0 = 0; + rc = RTPathAbs(pszPath, szRealPath, sizeof(szRealPath) - 1); + } + else + { + cbFilter = strlen(pszFilter) + 1; + cucFilter0 = RTStrUniLen(pszFilter) + 1; + + if (pszFilter != pszPath) + { + /* yea, I'm lazy. sue me. */ + char *pszTmp = RTStrDup(pszPath); + if (!pszTmp) + return VERR_NO_MEMORY; + pszTmp[pszFilter - pszPath] = '\0'; + rc = RTPathAbs(pszTmp, szRealPath, sizeof(szRealPath) - 1); + RTStrFree(pszTmp); + } + else + rc = RTPathReal(".", szRealPath, sizeof(szRealPath) - 1); + fDirSlash = true; + } + if (RT_FAILURE(rc)) + return rc; + + /* add trailing '/' if missing. */ + size_t cchRealPath = strlen(szRealPath); + if (!RTPATH_IS_SEP(szRealPath[cchRealPath - 1])) + { + szRealPath[cchRealPath++] = RTPATH_SLASH; + szRealPath[cchRealPath] = '\0'; + } + + /* + * Allocate and initialize the directory handle. + * + * The posix definition of Data.d_name allows it to be < NAME_MAX + 1, + * thus the horrible ugliness here. Solaris uses d_name[1] for instance. + */ + size_t cbDir = rtDirNativeGetStructSize(szRealPath); + size_t const cbAllocated = cbDir + + cucFilter0 * sizeof(RTUNICP) + + cbFilter + + cchRealPath + 1 + 4; + PRTDIRINTERNAL pDir = (PRTDIRINTERNAL)RTMemAllocZ(cbAllocated); + if (!pDir) + return VERR_NO_MEMORY; + uint8_t *pb = (uint8_t *)pDir + cbDir; + + /* initialize it */ + pDir->u32Magic = RTDIR_MAGIC; + pDir->cbSelf = cbDir; + if (cbFilter) + { + pDir->puszFilter = (PRTUNICP)pb; + rc = RTStrToUniEx(pszFilter, RTSTR_MAX, &pDir->puszFilter, cucFilter0, &pDir->cucFilter); + AssertRC(rc); + pb += cucFilter0 * sizeof(RTUNICP); + pDir->pszFilter = (char *)memcpy(pb, pszFilter, cbFilter); + pDir->cchFilter = cbFilter - 1; + pb += cbFilter; + } + else + { + pDir->puszFilter = NULL; + pDir->cucFilter = 0; + pDir->pszFilter = NULL; + pDir->cchFilter = 0; + } + pDir->enmFilter = enmFilter; + switch (enmFilter) + { + default: + case RTDIRFILTER_NONE: + pDir->pfnFilter = NULL; + break; + case RTDIRFILTER_WINNT: + pDir->pfnFilter = rtDirFilterWinNtInit(pDir); + break; + case RTDIRFILTER_UNIX: + pDir->pfnFilter = NULL; + break; + case RTDIRFILTER_UNIX_UPCASED: + pDir->pfnFilter = NULL; + break; + } + pDir->cchPath = cchRealPath; + pDir->pszPath = (char *)memcpy(pb, szRealPath, cchRealPath + 1); + Assert(pb - (uint8_t *)pDir + cchRealPath + 1 <= cbAllocated); + pDir->pszName = NULL; + pDir->cchName = 0; + pDir->fFlags = fFlags; + pDir->fDirSlash = fDirSlash; + pDir->fDataUnread = false; + + /* + * Hand it over to the native part. + */ + rc = rtDirNativeOpen(pDir, szRealPath, hRelativeDir, pvNativeRelative); + if (RT_SUCCESS(rc)) + *phDir = pDir; + else + RTMemFree(pDir); + + return rc; +} + + +RTDECL(int) RTDirOpen(RTDIR *phDir, const char *pszPath) +{ + /* + * Validate input. + */ + AssertMsgReturn(VALID_PTR(phDir), ("%p\n", phDir), VERR_INVALID_POINTER); + AssertMsgReturn(VALID_PTR(pszPath), ("%p\n", pszPath), VERR_INVALID_POINTER); + + /* + * Take common cause with RTDirOpenFiltered(). + */ + int rc = rtDirOpenCommon(phDir, pszPath, NULL, RTDIRFILTER_NONE, 0 /*fFlags*/, ~(uintptr_t)0, NULL); + LogFlow(("RTDirOpen(%p:{%p}, %p:{%s}): return %Rrc\n", phDir, *phDir, pszPath, pszPath, rc)); + return rc; +} + + +DECLHIDDEN(int) rtDirOpenRelativeOrHandle(RTDIR *phDir, const char *pszPath, RTDIRFILTER enmFilter, uint32_t fFlags, + uintptr_t hRelativeDir, void *pvNativeRelative) +{ + /* + * Validate input. + */ + AssertMsgReturn(VALID_PTR(phDir), ("%p\n", phDir), VERR_INVALID_POINTER); + AssertMsgReturn(VALID_PTR(pszPath), ("%p\n", pszPath), VERR_INVALID_POINTER); + AssertReturn(!(fFlags & ~RTDIR_F_VALID_MASK), VERR_INVALID_FLAGS); + switch (enmFilter) + { + case RTDIRFILTER_UNIX: + case RTDIRFILTER_UNIX_UPCASED: + AssertMsgFailed(("%d is not implemented!\n", enmFilter)); + return VERR_NOT_IMPLEMENTED; + case RTDIRFILTER_NONE: + case RTDIRFILTER_WINNT: + break; + default: + AssertMsgFailedReturn(("%d\n", enmFilter), VERR_INVALID_PARAMETER); + } + + /* + * Find the last component, i.e. where the filter criteria starts and the dir name ends. + */ + const char *pszFilter; + if (enmFilter == RTDIRFILTER_NONE) + pszFilter = NULL; + else + { + pszFilter = RTPathFilename(pszPath); + if (!pszFilter) /* trailing slash => directory to read => no filter. */ + enmFilter = RTDIRFILTER_NONE; + } + + /* + * Call worker common with RTDirOpen which will verify the path, allocate + * and initialize the handle, and finally call the backend. + */ + int rc = rtDirOpenCommon(phDir, pszPath, pszFilter, enmFilter, fFlags, hRelativeDir, pvNativeRelative); + + LogFlow(("RTDirOpenFiltered(%p:{%p}, %p:{%s}, %d, %#x, %p, %p): return %Rrc\n", + phDir,*phDir, pszPath, pszPath, enmFilter, fFlags, hRelativeDir, pvNativeRelative, rc)); + return rc; +} + + +RTDECL(int) RTDirOpenFiltered(RTDIR *phDir, const char *pszPath, RTDIRFILTER enmFilter, uint32_t fFlags) +{ + return rtDirOpenRelativeOrHandle(phDir, pszPath, enmFilter, fFlags, ~(uintptr_t)0, NULL); +} + + +RTDECL(bool) RTDirIsValid(RTDIR hDir) +{ + return RT_VALID_PTR(hDir) + && hDir->u32Magic == RTDIR_MAGIC; +} + + +RTDECL(int) RTDirFlushParent(const char *pszChild) +{ + char szPath[RTPATH_MAX]; + int rc = RTStrCopy(szPath, sizeof(szPath), pszChild); + if (RT_SUCCESS(rc)) + { + RTPathStripFilename(szPath); + rc = RTDirFlush(szPath); + } + return rc; +} + + +RTDECL(int) RTDirQueryUnknownTypeEx(const char *pszComposedName, bool fFollowSymlinks, + RTDIRENTRYTYPE *penmType, PRTFSOBJINFO pObjInfo) +{ + int rc = RTPathQueryInfoEx(pszComposedName, pObjInfo, RTFSOBJATTRADD_NOTHING, + fFollowSymlinks ? RTPATH_F_FOLLOW_LINK : RTPATH_F_ON_LINK); + if (RT_FAILURE(rc)) + return rc; + + if (RTFS_IS_DIRECTORY(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_DIRECTORY; + else if (RTFS_IS_FILE(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_FILE; + else if (RTFS_IS_SYMLINK(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_SYMLINK; + else if (RTFS_IS_FIFO(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_FIFO; + else if (RTFS_IS_DEV_CHAR(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_DEV_CHAR; + else if (RTFS_IS_DEV_BLOCK(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_DEV_BLOCK; + else if (RTFS_IS_SOCKET(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_SOCKET; + else if (RTFS_IS_WHITEOUT(pObjInfo->Attr.fMode)) + *penmType = RTDIRENTRYTYPE_WHITEOUT; + else + *penmType = RTDIRENTRYTYPE_UNKNOWN; + + return VINF_SUCCESS; +} + + +RTDECL(int) RTDirQueryUnknownType(const char *pszComposedName, bool fFollowSymlinks, RTDIRENTRYTYPE *penmType) +{ + if ( *penmType != RTDIRENTRYTYPE_UNKNOWN + && ( !fFollowSymlinks + || *penmType != RTDIRENTRYTYPE_SYMLINK)) + return VINF_SUCCESS; + + RTFSOBJINFO ObjInfo; + return RTDirQueryUnknownTypeEx(pszComposedName, fFollowSymlinks, penmType, &ObjInfo); +} + + +RTDECL(bool) RTDirEntryIsStdDotLink(PRTDIRENTRY pDirEntry) +{ + if (pDirEntry->szName[0] != '.') + return false; + if (pDirEntry->cbName == 1) + return true; + if (pDirEntry->cbName != 2) + return false; + return pDirEntry->szName[1] == '.'; +} + + +RTDECL(bool) RTDirEntryExIsStdDotLink(PCRTDIRENTRYEX pDirEntryEx) +{ + if (pDirEntryEx->szName[0] != '.') + return false; + if (pDirEntryEx->cbName == 1) + return true; + if (pDirEntryEx->cbName != 2) + return false; + return pDirEntryEx->szName[1] == '.'; +} + + +RTDECL(int) RTDirReadExA(RTDIR hDir, PRTDIRENTRYEX *ppDirEntry, size_t *pcbDirEntry, RTFSOBJATTRADD enmAddAttr, uint32_t fFlags) +{ + PRTDIRENTRYEX pDirEntry = *ppDirEntry; + size_t cbDirEntry = *pcbDirEntry; + if (pDirEntry != NULL && cbDirEntry >= sizeof(RTDIRENTRYEX)) + { /* likely */ } + else + { + Assert(pDirEntry == NULL); + Assert(cbDirEntry == 0); + + cbDirEntry = RT_ALIGN_Z(sizeof(RTDIRENTRYEX), 16); + *ppDirEntry = pDirEntry = (PRTDIRENTRYEX)RTMemTmpAlloc(cbDirEntry); + if (pDirEntry) + *pcbDirEntry = cbDirEntry; + else + { + *pcbDirEntry = 0; + return VERR_NO_TMP_MEMORY; + } + } + + for (;;) + { + int rc = RTDirReadEx(hDir, pDirEntry, &cbDirEntry, enmAddAttr, fFlags); + if (rc != VERR_BUFFER_OVERFLOW) + return rc; + + /* Grow the buffer. */ + RTMemTmpFree(pDirEntry); + cbDirEntry = RT_MAX(RT_ALIGN_Z(cbDirEntry, 64), *pcbDirEntry + 64); + *ppDirEntry = pDirEntry = (PRTDIRENTRYEX)RTMemTmpAlloc(cbDirEntry); + if (pDirEntry) + *pcbDirEntry = cbDirEntry; + else + { + *pcbDirEntry = 0; + return VERR_NO_TMP_MEMORY; + } + } +} + + +RTDECL(void) RTDirReadExAFree(PRTDIRENTRYEX *ppDirEntry, size_t *pcbDirEntry) +{ + PRTDIRENTRYEX pDirEntry = *ppDirEntry; + if (pDirEntry != NULL && *pcbDirEntry >= sizeof(*pcbDirEntry)) + RTMemTmpFree(pDirEntry); + else + { + Assert(pDirEntry == NULL); + Assert(*pcbDirEntry == 0); + } + *ppDirEntry = NULL; + *pcbDirEntry = 0; +} + |