mirror of
https://github.com/veracrypt/VeraCrypt.git
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7c3355a2d1
We query the kern.geom.conftxt sysctl for the GEOM configuration to find the partition offset. Technically speaking it would probably be better to link against libgeom but this is less overall intrusive. Also includes a small fix to find the parent device of an encrypted partition when it is a GPT partition rather than a BSD slice.
130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
/*
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Derived from source code of TrueCrypt 7.1a, which is
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Copyright (c) 2008-2012 TrueCrypt Developers Association and which is governed
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by the TrueCrypt License 3.0.
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Modifications and additions to the original source code (contained in this file)
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and all other portions of this file are Copyright (c) 2013-2017 IDRIX
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and are governed by the Apache License 2.0 the full text of which is
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contained in the file License.txt included in VeraCrypt binary and source
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code distribution packages.
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*/
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#include "Platform/FilesystemPath.h"
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#include "Platform/SystemException.h"
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#include "Platform/StringConverter.h"
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#include <stdio.h>
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#include <sys/stat.h>
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#if !defined(__FreeBSD__) && !defined(__APPLE__) && !defined(__OpenBSD__)
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#include <sys/sysmacros.h>
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#endif
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namespace VeraCrypt
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{
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void FilesystemPath::Delete () const
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{
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throw_sys_sub_if (remove (string (*this).c_str()) == -1, Path);
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}
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UserId FilesystemPath::GetOwner () const
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{
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struct stat statData;
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throw_sys_if (stat (StringConverter::ToSingle (Path).c_str(), &statData) == -1);
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UserId owner;
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owner.SystemId = statData.st_uid;
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return owner;
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}
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FilesystemPathType::Enum FilesystemPath::GetType () const
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{
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// Strip trailing directory separator
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wstring path = Path;
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size_t pos = path.find_last_not_of (L'/');
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if (path.size() > 2 && pos != path.size() - 1)
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path = path.substr (0, pos + 1);
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struct stat statData;
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throw_sys_sub_if (stat (StringConverter::ToSingle (path).c_str(), &statData) != 0, Path);
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if (S_ISREG (statData.st_mode)) return FilesystemPathType::File;
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if (S_ISDIR (statData.st_mode)) return FilesystemPathType::Directory;
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if (S_ISCHR (statData.st_mode)) return FilesystemPathType::CharacterDevice;
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if (S_ISBLK (statData.st_mode)) return FilesystemPathType::BlockDevice;
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if (S_ISLNK (statData.st_mode)) return FilesystemPathType::SymbolickLink;
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return FilesystemPathType::Unknown;
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}
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FilesystemPath FilesystemPath::ToBaseName () const
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{
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wstring path = Path;
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size_t pos = path.find_last_of (L'/');
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if (pos == string::npos)
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return Path;
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return Path.substr (pos + 1);
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}
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FilesystemPath FilesystemPath::ToHostDriveOfPartition () const
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{
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DevicePath path;
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#ifdef TC_LINUX
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path = StringConverter::StripTrailingNumber (StringConverter::ToSingle (Path));
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// If simply removing trailing number didn't produce a valid drive name, try to use sysfs to get the right one
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if (!path.IsDevice()) {
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struct stat st;
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if(stat (StringConverter::ToSingle (Path).c_str (), &st) == 0) {
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const long maxPathLength = pathconf ("/", _PC_PATH_MAX);
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if(maxPathLength != -1) {
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string linkPathName ("/sys/dev/block/");
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linkPathName += StringConverter::ToSingle (major (st.st_rdev)) + string (":") + StringConverter::ToSingle (minor (st.st_rdev));
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vector<char> linkTargetPath(maxPathLength+1);
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if(readlink(linkPathName.c_str (), linkTargetPath.data(), linkTargetPath.size()) != -1) {
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const string targetPathStr (linkTargetPath.data());
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const size_t lastSlashPos = targetPathStr.find_last_of ('/');
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const size_t secondLastSlashPos = targetPathStr.find_last_of ('/', lastSlashPos-1);
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path = string ("/dev/") + targetPathStr.substr (secondLastSlashPos+1, lastSlashPos-secondLastSlashPos-1);
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}
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}
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}
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}
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#elif defined (TC_MACOSX)
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string pathStr = StringConverter::StripTrailingNumber (StringConverter::ToSingle (Path));
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path = pathStr.substr (0, pathStr.size() - 1);
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#elif defined (TC_FREEBSD)
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string pathStr = StringConverter::ToSingle (Path);
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size_t p = pathStr.rfind ("s");
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if (p == string::npos) {
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p = pathStr.rfind ("p");
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if (p == string::npos)
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throw PartitionDeviceRequired (SRC_POS);
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}
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path = pathStr.substr (0, p);
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#elif defined (TC_SOLARIS)
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path = StringConverter::StripTrailingNumber (StringConverter::ToSingle (Path)) + "0";
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#else
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throw NotImplemented (SRC_POS);
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#endif
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if (!path.IsDevice())
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throw PartitionDeviceRequired (SRC_POS);
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return path;
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}
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}
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