oxmc
80 lines
3.6 KiB
C++
80 lines
3.6 KiB
C++
// *****************************************************************************
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// * This file is part of the FreeFileSync project. It is distributed under *
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// * GNU General Public License: https://www.gnu.org/licenses/gpl-3.0 *
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// * Copyright (C) Zenju (zenju AT freefilesync DOT org) - All Rights Reserved *
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// *****************************************************************************
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#include "file_traverser.h"
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#include "file_error.h"
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#include "file_access.h"
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#include <sys/stat.h>
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#include <dirent.h>
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using namespace zen;
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void zen::traverseFolder(const Zstring& dirPath,
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const std::function<void(const FileInfo& fi)>& onFile,
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const std::function<void(const FolderInfo& fi)>& onFolder,
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const std::function<void(const SymlinkInfo& si)>& onSymlink) //throw FileError
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{
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DIR* folder = ::opendir(dirPath.c_str()); //directory must NOT end with path separator, except "/"
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if (!folder)
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THROW_LAST_FILE_ERROR(replaceCpy(_("Cannot open directory %x."), L"%x", fmtPath(dirPath)), "opendir");
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ZEN_ON_SCOPE_EXIT(::closedir(folder)); //never close nullptr handles! -> crash
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for (;;)
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{
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errno = 0;
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const dirent* dirEntry = ::readdir(folder); //don't use readdir_r(), see comment in native.cpp
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if (!dirEntry)
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{
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if (errno == 0) //errno left unchanged => no more items
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return;
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THROW_LAST_FILE_ERROR(replaceCpy(_("Cannot read directory %x."), L"%x", fmtPath(dirPath)), "readdir");
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//don't retry but restart dir traversal on error! https://devblogs.microsoft.com/oldnewthing/20140612-00/?p=753/
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}
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//don't return "." and ".."
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const char* itemNameRaw = dirEntry->d_name;
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if (itemNameRaw[0] == '.' &&
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(itemNameRaw[1] == 0 || (itemNameRaw[1] == '.' && itemNameRaw[2] == 0)))
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continue;
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const Zstring& itemName = itemNameRaw;
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if (itemName.empty()) //checks result of normalizeUtfForPosix, too!
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throw FileError(replaceCpy(_("Cannot read directory %x."), L"%x", fmtPath(dirPath)), formatSystemError("readdir", L"", L"Folder contains an item without name."));
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const Zstring& itemPath = appendPath(dirPath, itemName);
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struct stat statData = {};
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if (::lstat(itemPath.c_str(), &statData) != 0) //lstat() does not resolve symlinks
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THROW_LAST_FILE_ERROR(replaceCpy(_("Cannot read file attributes of %x."), L"%x", fmtPath(itemPath)), "lstat");
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if (S_ISLNK(statData.st_mode)) //on Linux there is no distinction between file and directory symlinks!
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{
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if (onSymlink)
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onSymlink({ itemName, itemPath, statData.st_mtime});
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}
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else if (S_ISDIR(statData.st_mode)) //a directory
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{
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if (onFolder)
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onFolder({itemName, itemPath});
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}
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else //a file or named pipe, etc. S_ISREG, S_ISCHR, S_ISBLK, S_ISFIFO, S_ISSOCK
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{
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if (onFile)
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onFile({itemName, itemPath, makeUnsigned(statData.st_size), statData.st_mtime});
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/* It may be a good idea to not check "S_ISREG(statData.st_mode)" explicitly and to not issue an error message on other types to support these scenarios:
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- RTS setup watch (essentially wants to read directories only)
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- removeDirectory (wants to delete everything; pipes can be deleted just like files via "unlink")
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However an "open" on a pipe will block (https://sourceforge.net/p/freefilesync/bugs/221/), so the copy routines better be smart! */
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}
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}
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}
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