/* $Id: dir.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */ /** @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 #include "internal/iprt.h" #include #include #include #include #include #include #include #include #include #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; }