X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/bd362275b853cc0308bbde6a60bb2525d659f709..64ea838d8f4d1853b7d850db93ee565e901d099a:/src/common/filename.cpp diff --git a/src/common/filename.cpp b/src/common/filename.cpp index 105bc26007..17f40be930 100644 --- a/src/common/filename.cpp +++ b/src/common/filename.cpp @@ -33,7 +33,7 @@ http://msdn.microsoft.com/en-us/library/aa365248(VS.85).aspx. - wxPATH_MAC: Mac OS 8/9 and Mac OS X under CodeWarrior 7 format, absolute file + wxPATH_MAC: Mac OS 8/9 only, not used any longer, absolute file names have the form volume:dir1:...:dirN:filename and the relative file names are either @@ -77,7 +77,7 @@ #endif #ifndef WX_PRECOMP - #ifdef __WXMSW__ + #ifdef __WINDOWS__ #include "wx/msw/wrapwin.h" // For GetShort/LongPathName #endif #include "wx/dynarray.h" @@ -98,7 +98,7 @@ #include "wx/msw/gccpriv.h" #endif -#ifdef __WXMSW__ +#ifdef __WINDOWS__ #include "wx/msw/private.h" #endif @@ -118,19 +118,6 @@ #include #endif -#ifdef __MWERKS__ -#ifdef __MACH__ -#include -#include -#include -#include -#else -#include -#include -#include -#endif -#endif - #ifdef __WATCOMC__ #include #include @@ -148,6 +135,12 @@ #define MAX_PATH _MAX_PATH #endif +#ifndef S_ISREG + #define S_ISREG(mode) ((mode) & S_IFREG) +#endif +#ifndef S_ISDIR + #define S_ISDIR(mode) ((mode) & S_IFDIR) +#endif #if wxUSE_LONGLONG extern const wxULongLong wxInvalidSize = (unsigned)-1; @@ -339,6 +332,56 @@ static bool IsUNCPath(const wxString& path, wxPathFormat format) !IsDOSPathSep(path[2u]); } +#ifndef __WIN32__ + +// Under Unix-ish systems (basically everything except Windows) we may work +// either with the file itself or its target if it's a symbolic link and we +// should dereference it, as determined by wxFileName::ShouldFollowLink() and +// the absence of the wxFILE_EXISTS_NO_FOLLOW flag. StatAny() can be used to +// stat the appropriate file with an extra twist that it also works when there +// is no wxFileName object at all, as is the case in static methods. + +// Private implementation, don't call directly, use one of the overloads below. +bool DoStatAny(wxStructStat& st, wxString path, bool dereference) +{ + // We need to remove any trailing slashes from the path because they could + // interfere with the symlink following decision: even if we use lstat(), + // it would still follow the symlink if we pass it a path with a slash at + // the end because the symlink resolution would happen while following the + // path and not for the last path element itself. + + while ( wxEndsWithPathSeparator(path) ) + { + const size_t posLast = path.length() - 1; + if ( !posLast ) + { + // Don't turn "/" into empty string. + break; + } + + path.erase(posLast); + } + + int ret = dereference ? wxStat(path, &st) : wxLstat(path, &st); + return ret == 0; +} + +// Overloads to use for a case when we don't have wxFileName object and when we +// do have one. +inline +bool StatAny(wxStructStat& st, const wxString& path, int flags) +{ + return DoStatAny(st, path, !(flags & wxFILE_EXISTS_NO_FOLLOW)); +} + +inline +bool StatAny(wxStructStat& st, const wxFileName& fn) +{ + return DoStatAny(st, fn.GetFullPath(), fn.ShouldFollowLink()); +} + +#endif // !__WIN32__ + // ---------------------------------------------------------------------------- // private constants // ---------------------------------------------------------------------------- @@ -364,6 +407,7 @@ void wxFileName::Assign( const wxFileName &filepath ) m_ext = filepath.GetExt(); m_relative = filepath.m_relative; m_hasExt = filepath.m_hasExt; + m_dontFollowLinks = filepath.m_dontFollowLinks; } void wxFileName::Assign(const wxString& volume, @@ -573,6 +617,9 @@ void wxFileName::Clear() // nor any extension m_hasExt = false; + + // follow symlinks by default + m_dontFollowLinks = false; } /* static */ @@ -593,94 +640,168 @@ wxFileName wxFileName::DirName(const wxString& dir, wxPathFormat format) // existence tests // ---------------------------------------------------------------------------- -bool wxFileName::FileExists() const -{ - return wxFileName::FileExists( GetFullPath() ); -} - -/* static */ -bool wxFileName::FileExists( const wxString &filePath ) +namespace { -#if defined(__WIN32__) && !defined(__WXMICROWIN__) - // we must use GetFileAttributes() instead of the ANSI C functions because - // it can cope with network (UNC) paths unlike them - DWORD ret = ::GetFileAttributes(filePath.t_str()); - - return (ret != INVALID_FILE_ATTRIBUTES) && !(ret & FILE_ATTRIBUTE_DIRECTORY); -#else // !__WIN32__ - #ifndef S_ISREG - #define S_ISREG(mode) ((mode) & S_IFREG) - #endif - wxStructStat st; - return (wxStat( filePath, &st) == 0 && S_ISREG(st.st_mode)) -#ifdef __OS2__ - || (errno == EACCES) // if access is denied something with that name - // exists and is opened in exclusive mode. -#endif - ; -#endif // __WIN32__/!__WIN32__ -} +#if defined(__WINDOWS__) && !defined(__WXMICROWIN__) -bool wxFileName::DirExists() const -{ - return wxFileName::DirExists( GetPath() ); -} - -/* static */ -bool wxFileName::DirExists( const wxString &dirPath ) +void RemoveTrailingSeparatorsFromPath(wxString& strPath) { - wxString strPath(dirPath); - -#if defined(__WINDOWS__) || defined(__OS2__) // Windows fails to find directory named "c:\dir\" even if "c:\dir" exists, // so remove all trailing backslashes from the path - but don't do this for // the paths "d:\" (which are different from "d:"), for just "\" or for // windows unique volume names ("\\?\Volume{GUID}\") - while ( wxEndsWithPathSeparator(strPath) ) + while ( wxEndsWithPathSeparator( strPath ) ) { size_t len = strPath.length(); if ( len == 1 || (len == 3 && strPath[len - 2] == wxT(':')) || - (len == wxMSWUniqueVolumePrefixLength && - wxFileName::IsMSWUniqueVolumeNamePath(strPath))) + (len == wxMSWUniqueVolumePrefixLength && + wxFileName::IsMSWUniqueVolumeNamePath(strPath))) { break; } strPath.Truncate(len - 1); } -#endif // __WINDOWS__ +} -#ifdef __OS2__ - // OS/2 can't handle "d:", it wants either "d:\" or "d:." - if (strPath.length() == 2 && strPath[1u] == wxT(':')) - strPath << wxT('.'); -#endif +#endif // __WINDOWS__ || __OS2__ -#if defined(__WIN32__) && !defined(__WXMICROWIN__) - // stat() can't cope with network paths +bool +wxFileSystemObjectExists(const wxString& path, int flags) +{ + + // Should the existence of file/directory with this name be accepted, i.e. + // result in the true return value from this function? + const bool acceptFile = (flags & wxFILE_EXISTS_REGULAR) != 0; + const bool acceptDir = (flags & wxFILE_EXISTS_DIR) != 0; + + wxString strPath(path); + +#if defined(__WINDOWS__) && !defined(__WXMICROWIN__) + if ( acceptDir ) + { + // Ensure that the path doesn't have any trailing separators when + // checking for directories. + RemoveTrailingSeparatorsFromPath(strPath); + } + + // we must use GetFileAttributes() instead of the ANSI C functions because + // it can cope with network (UNC) paths unlike them DWORD ret = ::GetFileAttributes(strPath.t_str()); - return (ret != INVALID_FILE_ATTRIBUTES) && (ret & FILE_ATTRIBUTE_DIRECTORY); + if ( ret == INVALID_FILE_ATTRIBUTES ) + return false; + + if ( ret & FILE_ATTRIBUTE_DIRECTORY ) + return acceptDir; + + // Anything else must be a file (perhaps we should check for + // FILE_ATTRIBUTE_REPARSE_POINT?) + return acceptFile; #elif defined(__OS2__) + if ( acceptDir ) + { + // OS/2 can't handle "d:", it wants either "d:\" or "d:." + if (strPath.length() == 2 && strPath[1u] == wxT(':')) + strPath << wxT('.'); + } + FILESTATUS3 Info = {{0}}; APIRET rc = ::DosQueryPathInfo((PSZ)(WXSTRINGCAST strPath), FIL_STANDARD, - (void*) &Info, sizeof(FILESTATUS3)); + (void*) &Info, sizeof(FILESTATUS3)); + + if ( rc == NO_ERROR ) + { + if ( Info.attrFile & FILE_DIRECTORY ) + return acceptDir; + else + return acceptFile; + } - return ((rc == NO_ERROR) && (Info.attrFile & FILE_DIRECTORY)) || - (rc == ERROR_SHARING_VIOLATION); - // If we got a sharing violation, there must be something with this name. -#else // !__WIN32__ + // We consider that the path must exist if we get a sharing violation for + // it but we don't know what is it in this case. + if ( rc == ERROR_SHARING_VIOLATION ) + return flags & wxFILE_EXISTS_ANY; + // Any other error (usually ERROR_PATH_NOT_FOUND), means there is nothing + // there. + return false; +#else // Non-MSW, non-OS/2 wxStructStat st; -#ifndef __VISAGECPP__ - return wxStat(strPath, &st) == 0 && ((st.st_mode & S_IFMT) == S_IFDIR); -#else - // S_IFMT not supported in VA compilers.. st_mode is a 2byte value only - return wxStat(strPath, &st) == 0 && (st.st_mode == S_IFDIR); -#endif + if ( !StatAny(st, strPath, flags) ) + return false; + + if ( S_ISREG(st.st_mode) ) + return acceptFile; + if ( S_ISDIR(st.st_mode) ) + return acceptDir; + if ( S_ISLNK(st.st_mode) ) + { + // Take care to not test for "!= 0" here as this would erroneously + // return true if only wxFILE_EXISTS_NO_FOLLOW, which is part of + // wxFILE_EXISTS_SYMLINK, is set too. + return (flags & wxFILE_EXISTS_SYMLINK) == wxFILE_EXISTS_SYMLINK; + } + if ( S_ISBLK(st.st_mode) || S_ISCHR(st.st_mode) ) + return (flags & wxFILE_EXISTS_DEVICE) != 0; + if ( S_ISFIFO(st.st_mode) ) + return (flags & wxFILE_EXISTS_FIFO) != 0; + if ( S_ISSOCK(st.st_mode) ) + return (flags & wxFILE_EXISTS_SOCKET) != 0; + + return flags & wxFILE_EXISTS_ANY; +#endif // Platforms +} -#endif // __WIN32__/!__WIN32__ +} // anonymous namespace + +bool wxFileName::FileExists() const +{ + int flags = wxFILE_EXISTS_REGULAR; + if ( !ShouldFollowLink() ) + flags |= wxFILE_EXISTS_NO_FOLLOW; + + return wxFileSystemObjectExists(GetFullPath(), flags); +} + +/* static */ +bool wxFileName::FileExists( const wxString &filePath ) +{ + return wxFileSystemObjectExists(filePath, wxFILE_EXISTS_REGULAR); +} + +bool wxFileName::DirExists() const +{ + int flags = wxFILE_EXISTS_DIR; + if ( !ShouldFollowLink() ) + flags |= wxFILE_EXISTS_NO_FOLLOW; + + return Exists(GetPath(), flags); +} + +/* static */ +bool wxFileName::DirExists( const wxString &dirPath ) +{ + return wxFileSystemObjectExists(dirPath, wxFILE_EXISTS_DIR); +} + +bool wxFileName::Exists(int flags) const +{ + // Notice that wxFILE_EXISTS_NO_FOLLOW may be specified in the flags even + // if our DontFollowLink() hadn't been called and we do honour it then. But + // if the user took the care of calling DontFollowLink(), it is always + // taken into account. + if ( !ShouldFollowLink() ) + flags |= wxFILE_EXISTS_NO_FOLLOW; + + return wxFileSystemObjectExists(GetFullPath(), flags); +} + +/* static */ +bool wxFileName::Exists(const wxString& path, int flags) +{ + return wxFileSystemObjectExists(path, flags); } // ---------------------------------------------------------------------------- @@ -770,7 +891,7 @@ static int wxOpenWithDeleteOnClose(const wxString& filename) DWORD attributes = FILE_ATTRIBUTE_TEMPORARY | FILE_FLAG_DELETE_ON_CLOSE; - HANDLE h = ::CreateFile(filename.fn_str(), access, 0, NULL, + HANDLE h = ::CreateFile(filename.t_str(), access, 0, NULL, disposition, attributes, NULL); return wxOpenOSFHandle(h, wxO_BINARY); @@ -805,7 +926,7 @@ static bool wxTempOpen(wxFFile *file, const wxString& path, bool *deleteOnClose) int fd = wxTempOpen(path, deleteOnClose); if (fd == -1) return false; - file->Attach(wx_fdopen(fd, "w+b")); + file->Attach(wx_fdopen(fd, "w+b"), path); return file->IsOpened(); #endif // wx_fdopen } @@ -916,7 +1037,7 @@ static wxString wxCreateTempImpl( if ( ffileTemp ) { #ifdef wx_fdopen - ffileTemp->Attach(wx_fdopen(fdTemp, "r+b")); + ffileTemp->Attach(wx_fdopen(fdTemp, "r+b"), path); #else ffileTemp->Open(path, wxT("r+b")); close(fdTemp); @@ -946,7 +1067,7 @@ static wxString wxCreateTempImpl( } #else // !HAVE_MKTEMP (includes __DOS__) // generate the unique file name ourselves - #if !defined(__DOS__) && (!defined(__MWERKS__) || defined(__DARWIN__) ) + #if !defined(__DOS__) path << (unsigned int)getpid(); #endif @@ -1263,7 +1384,7 @@ bool wxFileName::Rmdir(int flags) const bool wxFileName::Rmdir(const wxString& dir, int flags) { -#ifdef __WXMSW__ +#ifdef __WINDOWS__ if ( flags & wxPATH_RMDIR_RECURSIVE ) { // SHFileOperation needs double null termination string @@ -1276,11 +1397,7 @@ bool wxFileName::Rmdir(const wxString& dir, int flags) SHFILEOPSTRUCT fileop; wxZeroMemory(fileop); fileop.wFunc = FO_DELETE; - #if defined(__CYGWIN__) && defined(wxUSE_UNICODE) - fileop.pFrom = path.wc_str(); - #else - fileop.pFrom = path.fn_str(); - #endif + fileop.pFrom = path.t_str(); fileop.fFlags = FOF_SILENT | FOF_NOCONFIRMATION; #ifndef __WXWINCE__ // FOF_NOERRORUI is not defined in WinCE @@ -1299,10 +1416,24 @@ bool wxFileName::Rmdir(const wxString& dir, int flags) return true; } else if ( flags & wxPATH_RMDIR_FULL ) -#else // !__WXMSW__ +#else // !__WINDOWS__ if ( flags != 0 ) // wxPATH_RMDIR_FULL or wxPATH_RMDIR_RECURSIVE -#endif // !__WXMSW__ +#endif // !__WINDOWS__ { +#ifndef __WINDOWS__ + if ( flags & wxPATH_RMDIR_RECURSIVE ) + { + // When deleting the tree recursively, we are supposed to delete + // this directory itself even when it is a symlink -- but without + // following it. Do it here as wxRmdir() would simply follow if + // called for a symlink. + if ( wxFileName::Exists(dir, wxFILE_EXISTS_SYMLINK) ) + { + return wxRemoveFile(dir); + } + } +#endif // !__WINDOWS__ + wxString path(dir); if ( path.Last() != wxFILE_SEP_PATH ) path += wxFILE_SEP_PATH; @@ -1314,26 +1445,32 @@ bool wxFileName::Rmdir(const wxString& dir, int flags) wxString filename; - // first delete all subdirectories - bool cont = d.GetFirst(&filename, "", wxDIR_DIRS | wxDIR_HIDDEN); + // First delete all subdirectories: notice that we don't follow + // symbolic links, potentially leading outside this directory, to avoid + // unpleasant surprises. + bool cont = d.GetFirst(&filename, wxString(), + wxDIR_DIRS | wxDIR_HIDDEN | wxDIR_NO_FOLLOW); while ( cont ) { wxFileName::Rmdir(path + filename, flags); cont = d.GetNext(&filename); } -#ifndef __WXMSW__ +#ifndef __WINDOWS__ if ( flags & wxPATH_RMDIR_RECURSIVE ) { - // delete all files too - cont = d.GetFirst(&filename, "", wxDIR_FILES | wxDIR_HIDDEN); + // Delete all files too and, for the same reasons as above, don't + // follow symlinks which could refer to the files outside of this + // directory and just delete the symlinks themselves. + cont = d.GetFirst(&filename, wxString(), + wxDIR_FILES | wxDIR_HIDDEN | wxDIR_NO_FOLLOW); while ( cont ) { ::wxRemoveFile(path + filename); cont = d.GetNext(&filename); } } -#endif // !__WXMSW__ +#endif // !__WINDOWS__ } return ::wxRmdir(dir); @@ -1739,8 +1876,15 @@ bool wxFileName::SameAs(const wxFileName& filepath, wxPathFormat format) const if ( fn1.GetFullPath() == fn2.GetFullPath() ) return true; - // TODO: compare inodes for Unix, this works even when filenames are - // different but files are the same (symlinks) (VZ) +#if defined(__UNIX__) + wxStructStat st1, st2; + if ( StatAny(st1, fn1) && StatAny(st2, fn2) ) + { + if ( st1.st_ino == st2.st_ino && st1.st_dev == st2.st_dev ) + return true; + } + //else: It's not an error if one or both files don't exist. +#endif // defined __UNIX__ return false; } @@ -1748,7 +1892,7 @@ bool wxFileName::SameAs(const wxFileName& filepath, wxPathFormat format) const /* static */ bool wxFileName::IsCaseSensitive( wxPathFormat format ) { - // only Unix filenames are truely case-sensitive + // only Unix filenames are truly case-sensitive return GetFormat(format) == wxPATH_UNIX; } @@ -2059,7 +2203,7 @@ wxString wxFileName::GetShortPath() const { wxString path(GetFullPath()); -#if defined(__WXMSW__) && defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) +#if defined(__WINDOWS__) && defined(__WIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__) DWORD sz = ::GetShortPathName(path.t_str(), NULL, 0); if ( sz != 0 ) { @@ -2209,7 +2353,7 @@ wxPathFormat wxFileName::GetFormat( wxPathFormat format ) { if (format == wxPATH_NATIVE) { -#if defined(__WXMSW__) || defined(__OS2__) || defined(__DOS__) +#if defined(__WINDOWS__) || defined(__OS2__) || defined(__DOS__) format = wxPATH_DOS; #elif defined(__VMS) format = wxPATH_VMS; @@ -2601,14 +2745,16 @@ bool wxFileName::GetTimes(wxDateTime *dtAccess, #elif defined(__UNIX_LIKE__) || defined(__WXMAC__) || defined(__OS2__) || (defined(__DOS__) && defined(__WATCOMC__)) // no need to test for IsDir() here wxStructStat stBuf; - if ( wxStat( GetFullPath(), &stBuf) == 0 ) + if ( StatAny(stBuf, *this) ) { + // Android defines st_*time fields as unsigned long, but time_t as long, + // hence the static_casts. if ( dtAccess ) - dtAccess->Set(stBuf.st_atime); + dtAccess->Set(static_cast(stBuf.st_atime)); if ( dtMod ) - dtMod->Set(stBuf.st_mtime); + dtMod->Set(static_cast(stBuf.st_mtime)); if ( dtCreate ) - dtCreate->Set(stBuf.st_ctime); + dtCreate->Set(static_cast(stBuf.st_ctime)); return true; }