Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / clr / src / BCL / System / IO / Directory.cs / 1 / Directory.cs
// ==++==
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
// ==--==
/*============================================================
**
** Class: Directory
**
**
** Purpose: Exposes routines for enumerating through a
** directory.
**
** April 11,2000
**
===========================================================*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.Security;
using System.Security.Permissions;
using Microsoft.Win32;
using Microsoft.Win32.SafeHandles;
using System.Text;
using System.Runtime.InteropServices;
using System.Globalization;
using System.Runtime.Versioning;
#if !FEATURE_PAL
using System.Security.AccessControl;
#endif
namespace System.IO {
[ComVisible(true)]
public static class Directory {
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DirectoryInfo GetParent(String path)
{
if (path==null)
throw new ArgumentNullException("path");
if (path.Length==0)
throw new ArgumentException(Environment.GetResourceString("Argument_PathEmpty"), "path");
String fullPath = Path.GetFullPathInternal(path);
String s = Path.GetDirectoryName(fullPath);
if (s==null)
return null;
return new DirectoryInfo(s);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DirectoryInfo CreateDirectory(String path) {
#if !FEATURE_PAL
return CreateDirectory(path, null);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DirectoryInfo CreateDirectory(String path, DirectorySecurity directorySecurity) {
#endif
if (path==null)
throw new ArgumentNullException("path");
if (path.Length == 0)
throw new ArgumentException(Environment.GetResourceString("Argument_PathEmpty"));
String fullPath = Path.GetFullPathInternal(path);
// You need read access to the directory to be returned back and write access to all the directories
// that you need to create. If we fail any security checks we will not create any directories at all.
// We attempt to create directories only after all the security checks have passed. This is avoid doing
// a demand at every level.
String demandDir = GetDemandDir(fullPath, true);
new FileIOPermission(FileIOPermissionAccess.Read, new String[] { demandDir }, false, false ).Demand();
#if !FEATURE_PAL
InternalCreateDirectory(fullPath, path, directorySecurity);
#else
InternalCreateDirectory(fullPath, path);
#endif
return new DirectoryInfo(fullPath, false);
}
// Input to this method should already be fullpath. This method will ensure that we append
// the trailing slash only when appropriate and when thisDirOnly is specified append a "."
// at the end of the path to indicate that the demand is only for the fullpath and not
// everything underneath it.
[ResourceExposure(ResourceScope.None)]
[ResourceConsumption(ResourceScope.None, ResourceScope.None)]
internal static String GetDemandDir(string fullPath, bool thisDirOnly)
{
String demandPath;
if (thisDirOnly) {
if (fullPath.EndsWith( Path.DirectorySeparatorChar )
|| fullPath.EndsWith( Path.AltDirectorySeparatorChar ) )
demandPath = fullPath + '.';
else
demandPath = fullPath + Path.DirectorySeparatorChar + '.';
}
else {
if (!(fullPath.EndsWith( Path.DirectorySeparatorChar )
|| fullPath.EndsWith( Path.AltDirectorySeparatorChar )) )
demandPath = fullPath + Path.DirectorySeparatorChar;
else
demandPath = fullPath;
}
return demandPath;
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal unsafe static void InternalCreateDirectory(String fullPath, String path
#if !FEATURE_PAL
, DirectorySecurity dirSecurity
#endif
)
{
int length = fullPath.Length;
// We need to trim the trailing slash or the code will try to create 2 directories of the same name.
if (length >= 2 && Path.IsDirectorySeparator(fullPath[length - 1]))
length--;
int lengthRoot = Path.GetRootLength(fullPath);
#if !PLATFORM_UNIX
// For UNC paths that are only // or ///
if (length == 2 && Path.IsDirectorySeparator(fullPath[1]))
throw new IOException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("IO.IO_CannotCreateDirectory"), path));
#endif // !PLATFORM_UNIX
List stackDir = new List();
// Attempt to figure out which directories don't exist, and only
// create the ones we need. Note that InternalExists may fail due
// to Win32 ACL's preventing us from seeing a directory, and this
// isn't threadsafe.
bool somepathexists = false;
if (length > lengthRoot) { // Special case root (fullpath = X:\\)
int i = length-1;
while (i >= lengthRoot) {
String dir = fullPath.Substring(0, i+1);
if (!InternalExists(dir)) // Create only the ones missing
stackDir.Add(dir);
else
somepathexists = true;
while (i > lengthRoot && fullPath[i] != Path.DirectorySeparatorChar && fullPath[i] != Path.AltDirectorySeparatorChar) i--;
i--;
}
}
int count = stackDir.Count;
if (stackDir.Count != 0)
{
String [] securityList = new String[stackDir.Count];
stackDir.CopyTo(securityList, 0);
for (int j = 0 ; j < securityList.Length; j++)
securityList[j] += "\\."; // leaf will never have a slash at the end
// Security check for all directories not present only.
#if !FEATURE_PAL
AccessControlActions control = (dirSecurity == null) ? AccessControlActions.None : AccessControlActions.Change;
new FileIOPermission(FileIOPermissionAccess.Write, control, securityList, false, false ).Demand();
#else
new FileIOPermission(FileIOPermissionAccess.Write, securityList, false, false ).Demand();
#endif
}
// If we were passed a DirectorySecurity, convert it to a security
// descriptor and set it in he call to CreateDirectory.
Win32Native.SECURITY_ATTRIBUTES secAttrs = null;
#if !FEATURE_PAL
if (dirSecurity != null) {
secAttrs = new Win32Native.SECURITY_ATTRIBUTES();
secAttrs.nLength = (int)Marshal.SizeOf(secAttrs);
// For ACL's, get the security descriptor from the FileSecurity.
byte[] sd = dirSecurity.GetSecurityDescriptorBinaryForm();
byte * bytesOnStack = stackalloc byte[sd.Length];
Buffer.memcpy(sd, 0, bytesOnStack, 0, sd.Length);
secAttrs.pSecurityDescriptor = bytesOnStack;
}
#endif
bool r = true;
int firstError = 0;
String errorString = path;
// If all the security checks succeeded create all the directories
while (stackDir.Count > 0) {
String name = stackDir[stackDir.Count - 1];
stackDir.RemoveAt(stackDir.Count - 1);
if (name.Length > Path.MAX_DIRECTORY_PATH)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
r = Win32Native.CreateDirectory(name, secAttrs);
if (!r && (firstError == 0)) {
int currentError = Marshal.GetLastWin32Error();
// While we tried to avoid creating directories that don't
// exist above, there are at least two cases that will
// cause us to see ERROR_ALREADY_EXISTS here. InternalExists
// can fail because we didn't have permission to the
// directory. Secondly, another thread or process could
// create the directory between the time we check and the
// time we try using the directory. Thirdly, it could
// fail because the target does exist, but is a file.
if (currentError != Win32Native.ERROR_ALREADY_EXISTS)
firstError = currentError;
else {
// If there's a file in this directory's place, throw.
if (File.InternalExists(name)) {
firstError = currentError;
// Give the user a nice error message, but don't leak path information.
try {
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, GetDemandDir(name, true)).Demand();
errorString = name;
}
catch(SecurityException) {}
}
}
}
}
// We need this check to mask OS differences
// Handle CreateDirectory("X:\\foo") when X: doesn't exist. Similarly for n/w paths.
if ((count == 0) && !somepathexists) {
String root = InternalGetDirectoryRoot(fullPath);
if (!InternalExists(root)) {
// Extract the root from the passed in path again for security.
__Error.WinIOError(Win32Native.ERROR_PATH_NOT_FOUND, InternalGetDirectoryRoot(path));
}
return;
}
// Only throw an exception if creating the exact directory we
// wanted failed to work correctly.
if (!r && (firstError != 0)) {
__Error.WinIOError(firstError, errorString);
}
}
// Tests if the given path refers to an existing DirectoryInfo on disk.
//
// Your application must have Read permission to the directory's
// contents.
//
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static bool Exists(String path) {
try
{ if (path==null)
return false;
if (path.Length==0)
return false;
// Get fully qualified file name ending in \* for security check
String fullPath = Path.GetFullPathInternal(path);
String demandPath = GetDemandDir(fullPath, true);
new FileIOPermission(FileIOPermissionAccess.Read, new String[] { demandPath }, false, false ).Demand();
return InternalExists(fullPath);
}
catch(ArgumentException) {}
catch(NotSupportedException) {} // Security can throw this on ":"
catch(SecurityException) {}
catch(IOException) {}
catch(UnauthorizedAccessException)
{
#if !FEATURE_PAL
BCLDebug.Assert(false,"Ignore this assert and send a repro to [....]. This assert was tracking purposes only.");
#endif //!FEATURE_PAL
}
return false;
}
// Determine whether path describes an existing directory
// on disk, avoiding security checks.
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static bool InternalExists(String path) {
Win32Native.WIN32_FILE_ATTRIBUTE_DATA data = new Win32Native.WIN32_FILE_ATTRIBUTE_DATA();
int dataInitialised = File.FillAttributeInfo(path, ref data, false, true);
return (dataInitialised == 0) && (data.fileAttributes != -1)
&& ((data.fileAttributes & Win32Native.FILE_ATTRIBUTE_DIRECTORY) != 0);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void SetCreationTime(String path,DateTime creationTime)
{
SetCreationTimeUtc(path, creationTime.ToUniversalTime());
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public unsafe static void SetCreationTimeUtc(String path,DateTime creationTimeUtc)
{
#if !FEATURE_PAL
if ((Environment.OSInfo & Environment.OSName.WinNT) == Environment.OSName.WinNT)
#endif //!FEATURE_PAL
{
using (SafeFileHandle handle = Directory.OpenHandle(path)) {
Win32Native.FILE_TIME fileTime = new Win32Native.FILE_TIME(creationTimeUtc.ToFileTimeUtc());
bool r = Win32Native.SetFileTime(handle, &fileTime, null, null);
if (!r)
{
int errorCode = Marshal.GetLastWin32Error();
__Error.WinIOError(errorCode, path);
}
}
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DateTime GetCreationTime(String path)
{
return File.GetCreationTime(path);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DateTime GetCreationTimeUtc(String path)
{
return File.GetCreationTimeUtc(path);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void SetLastWriteTime(String path,DateTime lastWriteTime)
{
SetLastWriteTimeUtc(path, lastWriteTime.ToUniversalTime());
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public unsafe static void SetLastWriteTimeUtc(String path,DateTime lastWriteTimeUtc)
{
#if !FEATURE_PAL
if ((Environment.OSInfo & Environment.OSName.WinNT) == Environment.OSName.WinNT)
#endif //!FEATURE_PAL
{
using (SafeFileHandle handle = Directory.OpenHandle(path)) {
Win32Native.FILE_TIME fileTime = new Win32Native.FILE_TIME(lastWriteTimeUtc.ToFileTimeUtc());
bool r = Win32Native.SetFileTime(handle, null, null, &fileTime);
if (!r)
{
int errorCode = Marshal.GetLastWin32Error();
__Error.WinIOError(errorCode, path);
}
}
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DateTime GetLastWriteTime(String path)
{
return File.GetLastWriteTime(path);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DateTime GetLastWriteTimeUtc(String path)
{
return File.GetLastWriteTimeUtc(path);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void SetLastAccessTime(String path,DateTime lastAccessTime)
{
SetLastAccessTimeUtc(path, lastAccessTime.ToUniversalTime());
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public unsafe static void SetLastAccessTimeUtc(String path,DateTime lastAccessTimeUtc)
{
#if !FEATURE_PAL
if ((Environment.OSInfo & Environment.OSName.WinNT) == Environment.OSName.WinNT)
#endif //!FEATURE_PAL
{
using (SafeFileHandle handle = Directory.OpenHandle(path)) {
Win32Native.FILE_TIME fileTime = new Win32Native.FILE_TIME(lastAccessTimeUtc.ToFileTimeUtc());
bool r = Win32Native.SetFileTime(handle, null, &fileTime, null);
if (!r)
{
int errorCode = Marshal.GetLastWin32Error();
__Error.WinIOError(errorCode, path);
}
}
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DateTime GetLastAccessTime(String path)
{
return File.GetLastAccessTime(path);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DateTime GetLastAccessTimeUtc(String path)
{
return File.GetLastAccessTimeUtc(path);
}
#if !FEATURE_PAL
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DirectorySecurity GetAccessControl(String path)
{
return new DirectorySecurity(path, AccessControlSections.Access | AccessControlSections.Owner | AccessControlSections.Group);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static DirectorySecurity GetAccessControl(String path, AccessControlSections includeSections)
{
return new DirectorySecurity(path, includeSections);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void SetAccessControl(String path, DirectorySecurity directorySecurity)
{
if (directorySecurity == null)
throw new ArgumentNullException("directorySecurity");
String fullPath = Path.GetFullPathInternal(path);
directorySecurity.Persist(fullPath);
}
#endif
// Returns an array of filenames in the DirectoryInfo specified by path
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetFiles(String path)
{
return GetFiles(path,"*");
}
// Returns an array of Files in the current DirectoryInfo matching the
// given search pattern (ie, "*.txt").
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetFiles(String path,String searchPattern)
{
return GetFiles(path, searchPattern, SearchOption.TopDirectoryOnly);
}
// Returns an array of Files in the current DirectoryInfo matching the
// given search pattern (ie, "*.txt") and search option
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetFiles(String path,String searchPattern, SearchOption searchOption)
{
if (path==null)
throw new ArgumentNullException("path");
if (searchPattern==null)
throw new ArgumentNullException("searchPattern");
return InternalGetFileDirectoryNames(path, path, searchPattern, true, false, searchOption);
}
// Returns an array of Directories in the current directory.
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetDirectories(String path)
{
return GetDirectories(path,"*");
}
// Returns an array of Directories in the current DirectoryInfo matching the
// given search criteria (ie, "*.txt").
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetDirectories(String path,String searchPattern)
{
return GetDirectories(path, searchPattern, SearchOption.TopDirectoryOnly);
}
// Returns an array of Directories in the current DirectoryInfo matching the
// given search criteria (ie, "*.txt").
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetDirectories(String path,String searchPattern, SearchOption searchOption)
{
if (path==null)
throw new ArgumentNullException("path");
if (searchPattern==null)
throw new ArgumentNullException("searchPattern");
return InternalGetFileDirectoryNames(path, path, searchPattern, false, true, searchOption);
}
// Returns an array of strongly typed FileSystemInfo entries in the path
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetFileSystemEntries(String path)
{
return GetFileSystemEntries(path,"*");
}
// Returns an array of strongly typed FileSystemInfo entries in the path with the
// given search criteria (ie, "*.txt"). We disallow .. as a part of the search criteria
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String[] GetFileSystemEntries(String path,String searchPattern)
{
return GetFileSystemEntries(path, searchPattern, SearchOption.TopDirectoryOnly);
}
// Returns an array of strongly typed FileSystemInfo entries in the path with the
// given search criteria (ie, "*.txt"). We disallow .. as a part of the search criteria
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
private static String[] GetFileSystemEntries(String path,String searchPattern, SearchOption searchOption)
{
if (path==null)
throw new ArgumentNullException("path");
if (searchPattern==null)
throw new ArgumentNullException("searchPattern");
return InternalGetFileDirectoryNames(path, path, searchPattern, true, true, searchOption);
}
// Private class that holds search data that is passed around
// in the heap based stack recursion
private sealed class SearchData
{
public SearchData() {
}
public SearchData(string fullPath, string userPath, SearchOption searchOption) {
this.fullPath = fullPath;
this.userPath = userPath;
this.searchOption = searchOption;
}
public string fullPath; // Fully qualified search path excluding the search criteria in the end (ex, c:\temp\bar\foo)
public string userPath; // User specified path (ex, bar\foo)
public SearchOption searchOption;
}
// Returns fully qualified user path of dirs/files that matches the search parameters.
// For recursive search this method will search through all the sub dirs and execute
// the given search criteria against every dir.
// For all the dirs/files returned, it will then demand path discovery permission for
// their parent folders (it will avoid duplicate permission checks)
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static String[] InternalGetFileDirectoryNames(String path, String userPathOriginal, String searchPattern, bool includeFiles, bool includeDirs, SearchOption searchOption)
{
int hr = 0;
if ((searchOption != SearchOption.TopDirectoryOnly) && (searchOption != SearchOption.AllDirectories))
throw new ArgumentOutOfRangeException("searchOption", Environment.GetResourceString("ArgumentOutOfRange_Enum"));
searchPattern = searchPattern.TrimEnd();
if (searchPattern.Length == 0)
return new String[0];
Path.CheckSearchPattern(searchPattern);
// Build various paths and query strings
// Must fully qualify the path for the security check
String fullPath = Path.GetFullPathInternal(path);
// Any illegal chars such as *, ? will be caught by FileIOPermission.HasIllegalCharacters
String[] demandPaths = new String[] {GetDemandDir(fullPath, true)};
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, demandPaths, false, false).Demand();
String userPath = userPathOriginal;
String tempPath = Path.GetDirectoryName(searchPattern);
if (tempPath != null && tempPath.Length != 0) { // For filters like foo\*.cs we need to verify if the directory foo is not denied access.
// Do a demand on the combined path so that we can fail early in case of deny
demandPaths = new String[] {GetDemandDir(Path.InternalCombine(fullPath, tempPath), true)};
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, demandPaths, false, false).Demand();
userPath = Path.Combine(userPath, tempPath); // Need to add the searchPath to return correct path and for right security checks
}
String tempStr = Path.InternalCombine(fullPath, searchPattern);
// If path ends in a trailing slash (\), append a * or we'll
// get a "Cannot find the file specified" exception
char lastChar = tempStr[tempStr.Length-1];
if (lastChar == Path.DirectorySeparatorChar || lastChar == Path.AltDirectorySeparatorChar || lastChar == Path.VolumeSeparatorChar)
tempStr = tempStr + '*';
fullPath = Path.GetDirectoryName(tempStr);
BCLDebug.Assert((fullPath != null),"fullpath can't be null!");
String searchCriteria;
bool trailingSlash = false;
bool trailingSlashUserPath = false;
lastChar = fullPath[fullPath.Length-1];
trailingSlash = (lastChar == Path.DirectorySeparatorChar) || (lastChar == Path.AltDirectorySeparatorChar);
if (trailingSlash) {
// Can happen if the path is C:\temp, in which case GetDirectoryName would return C:\
searchCriteria = tempStr.Substring(fullPath.Length);
}
else
searchCriteria = tempStr.Substring(fullPath.Length + 1);
Win32Native.WIN32_FIND_DATA data = new Win32Native.WIN32_FIND_DATA();
SafeFindHandle hnd = null;
// Heap based search stack
SearchData searchData = new SearchData(fullPath, userPath, searchOption);
List searchStack = new List();
searchStack.Add(searchData);
List demandPathList = new List();
int numEntries = 0; // Number of directory entities we see.
int listSize = 0;
String[] list = new String[10];
String searchPath;
int oldMode = Win32Native.SetErrorMode(Win32Native.SEM_FAILCRITICALERRORS);
try {
// Traverse directory structure. We need to get '*'
while(searchStack.Count > 0) {
searchData = searchStack[searchStack.Count - 1];
searchStack.RemoveAt(searchStack.Count - 1);
BCLDebug.Assert((searchData.fullPath != null),"fullpath can't be null!");
lastChar = searchData.fullPath[searchData.fullPath.Length -1];
trailingSlash = (lastChar == Path.DirectorySeparatorChar) || (lastChar == Path.AltDirectorySeparatorChar);
if (searchData.userPath.Length > 0) {
lastChar = searchData.userPath[searchData.userPath.Length -1];
trailingSlashUserPath = (lastChar == Path.DirectorySeparatorChar) || (lastChar == Path.AltDirectorySeparatorChar);
}
// Traverse the subdirs if specified
if (searchData.searchOption != SearchOption.TopDirectoryOnly) {
try {
if (trailingSlash)
searchPath = searchData.fullPath + "*";
else
searchPath = searchData.fullPath + Path.DirectorySeparatorChar + "*";
// Get all files and dirs
hnd = Win32Native.FindFirstFile(searchPath, data);
if (hnd.IsInvalid) {
hr = Marshal.GetLastWin32Error();
// This could happen if the dir doesn't contain any files.
// Continue with the recursive search though, eventually
// searchStack will become empty
if (hr==Win32Native.ERROR_FILE_NOT_FOUND)
continue;
__Error.WinIOError(hr, searchData.fullPath);
}
// Add subdirs to searchStack. Exempt ReparsePoints as appropriate
do {
if ((0 != (data.dwFileAttributes & Win32Native.FILE_ATTRIBUTE_DIRECTORY))
&& !data.cFileName.Equals(".") && !data.cFileName.Equals("..")) {
// Setup search data for the sub directory and push it into the stack
SearchData searchDataSubDir = new SearchData();
// FullPath
StringBuilder strBldr = new StringBuilder(searchData.fullPath);
if (!trailingSlash)
strBldr.Append(Path.DirectorySeparatorChar);
strBldr.Append(data.cFileName);
searchDataSubDir.fullPath = strBldr.ToString();
// UserPath
strBldr.Length = 0;
strBldr.Append(searchData.userPath);
if (!trailingSlashUserPath)
strBldr.Append(Path.DirectorySeparatorChar);
strBldr.Append(data.cFileName);
searchDataSubDir.userPath = strBldr.ToString();
// SearchOption
searchDataSubDir.searchOption = searchData.searchOption;
#if EXCLUDE_REPARSEPOINTS
// Traverse reparse points depending on the searchoption specified
if ((searchDataSubDir.searchOption == SearchOption.AllDirectories) && (0 != (data.dwFileAttributes & Win32Native.FILE_ATTRIBUTE_REPARSE_POINT)))
searchDataSubDir.searchOption = SearchOption.TopDirectoryOnly;
#endif
searchStack.Add(searchDataSubDir);
}
} while (Win32Native.FindNextFile(hnd, data));
// We don't care about any error here
}
finally {
if (hnd != null)
hnd.Dispose();
}
}
// Execute searchCriteria against the current directory
try{
if (trailingSlash)
searchPath = searchData.fullPath + searchCriteria;
else
searchPath = searchData.fullPath + Path.DirectorySeparatorChar + searchCriteria;
// Open a Find handle
hnd = Win32Native.FindFirstFile(searchPath, data);
if (hnd.IsInvalid) {
hr = Marshal.GetLastWin32Error();
if (hr == Win32Native.ERROR_FILE_NOT_FOUND)
continue;
__Error.WinIOError(hr, searchData.fullPath);
}
numEntries = 0;
// Keep asking for more matching files/dirs, add it to the list
do {
bool includeThis = false; // Should this file/directory be included in the output?
if (includeFiles)
includeThis = (0 == (data.dwFileAttributes & Win32Native.FILE_ATTRIBUTE_DIRECTORY));
if (includeDirs) {
// Don't add "." nor ".."
if ((0 != (data.dwFileAttributes & Win32Native.FILE_ATTRIBUTE_DIRECTORY))
&& !data.cFileName.Equals(".") && !data.cFileName.Equals("..")) {
BCLDebug.Assert(!includeThis, data.cFileName + ": current item can't be both file and dir!");
includeThis = true;
}
}
if (includeThis) {
numEntries++;
if (listSize==list.Length) {
String[] newList = new String[list.Length*2];
Array.Copy(list, 0, newList, 0, listSize);
list = newList;
}
list[listSize++] = Path.InternalCombine(searchData.userPath, data.cFileName);
}
} while (Win32Native.FindNextFile(hnd, data));
// Make sure we quit with a sensible error.
hr = Marshal.GetLastWin32Error();
// Demand pathdiscovery for all the parent dirs that are returned
// I.e, if C:\temp\foo\bar is returned, demand C:\temp\foo
if (numEntries > 0) {
demandPathList.Add(GetDemandDir(searchData.fullPath, true));
}
}
finally {
if (hnd != null)
hnd.Dispose();
}
} // End while
}
finally {
Win32Native.SetErrorMode(oldMode);
}
// ERROR_FILE_NOT_FOUND is valid here because if the top level
// dir doen't contain any subdirs and matching files then
// we will get here with this errorcode from the searchStack walk
if ((hr != 0) && (hr != Win32Native.ERROR_NO_MORE_FILES)
&& (hr != Win32Native.ERROR_FILE_NOT_FOUND)) {
__Error.WinIOError(hr, searchData.fullPath);
}
// Demand pathdiscovery for all the parent dirs that are returned
// I.e, if C:\temp\foo\bar is returned, demand C:\temp\foo
if (demandPathList.Count > 0) {
demandPaths = new String[demandPathList.Count];
demandPathList.CopyTo(demandPaths, 0);
// No need to check for dupls as the demandPathList entries should be unique
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, demandPaths, false, false ).Demand();
}
// Check for a string such as "C:\tmp", in which case we return
// just the DirectoryInfo name. FindNextFile fails first time, and
// data still contains a directory.
/*
if (includeDirs && numEntries==1 && (0!=(data.dwFileAttributes & Win32Native.FILE_ATTRIBUTE_DIRECTORY))) {
String[] sa = new String[1];
sa[0] = Path.InternalCombine(searchData.userPath, data.cFileName);
return sa;
}
*/
// Return list of files/directories as an array of strings
if (listSize == list.Length)
return list;
String[] items = new String[listSize];
Array.Copy(list, 0, items, 0, listSize);
return items;
}
// Retrieves the names of the logical drives on this machine in the
// form "C:\".
//
// Your application must have System Info permission.
//
#if !PLATFORM_UNIX
public static String[] GetLogicalDrives()
{
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();
int drives = Win32Native.GetLogicalDrives();
if (drives==0)
__Error.WinIOError();
uint d = (uint)drives;
int count = 0;
while (d != 0) {
if (((int)d & 1) != 0) count++;
d >>= 1;
}
String[] result = new String[count];
char[] root = new char[] {'A', ':', '\\'};
d = (uint)drives;
count = 0;
while (d != 0) {
if (((int)d & 1) != 0) {
result[count++] = new String(root);
}
d >>= 1;
root[0]++;
}
return result;
}
#else
public static String[] GetLogicalDrives()
{
// On Unix systems, GetLogicalDrives
// should return an empty string array
return new String[0];
}
#endif // !PLATFORM_UNIX
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String GetDirectoryRoot(String path) {
if (path==null)
throw new ArgumentNullException("path");
String fullPath = Path.GetFullPathInternal(path);
String root = fullPath.Substring(0, Path.GetRootLength(fullPath));
String demandPath = GetDemandDir(root, true);
new FileIOPermission(FileIOPermissionAccess.PathDiscovery, new String[] { demandPath }, false, false ).Demand();
return root;
}
internal static String InternalGetDirectoryRoot(String path) {
if (path == null) return null;
return path.Substring(0, Path.GetRootLength(path));
}
/*===============================CurrentDirectory===============================
**Action: Provides a getter and setter for the current directory. The original
** current DirectoryInfo is the one from which the process was started.
**Returns: The current DirectoryInfo (from the getter). Void from the setter.
**Arguments: The current DirectoryInfo to which to switch to the setter.
**Exceptions:
==============================================================================*/
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static String GetCurrentDirectory()
{
StringBuilder sb = new StringBuilder(Path.MAX_PATH + 1);
if (Win32Native.GetCurrentDirectory(sb.Capacity, sb) == 0)
__Error.WinIOError();
String currentDirectory = sb.ToString();
// Note that if we have somehow put our command prompt into short
// file name mode (ie, by running edlin or a DOS grep, etc), then
// this will return a short file name.
if (currentDirectory.IndexOf('~') >= 0) {
int r = Win32Native.GetLongPathName(currentDirectory, sb, sb.Capacity);
if (r == 0 || r >= Path.MAX_PATH) {
int errorCode = Marshal.GetLastWin32Error();
if (r >= Path.MAX_PATH)
errorCode = Win32Native.ERROR_FILENAME_EXCED_RANGE;
if (errorCode != Win32Native.ERROR_FILE_NOT_FOUND &&
errorCode != Win32Native.ERROR_PATH_NOT_FOUND &&
errorCode != Win32Native.ERROR_INVALID_FUNCTION && // by design - enough said.
errorCode != Win32Native.ERROR_ACCESS_DENIED)
__Error.WinIOError(errorCode, String.Empty);
}
currentDirectory = sb.ToString();
}
String demandPath = GetDemandDir(currentDirectory, true);
new FileIOPermission( FileIOPermissionAccess.PathDiscovery, new String[] { demandPath }, false, false ).Demand();
return currentDirectory;
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void SetCurrentDirectory(String path)
{
if (path==null)
throw new ArgumentNullException("value");
if (path.Length==0)
throw new ArgumentException(Environment.GetResourceString("Argument_PathEmpty"));
if (path.Length >= Path.MAX_PATH)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
// This will have some large effects on the rest of the runtime
// and other appdomains in this process. Demand unmanaged code.
new SecurityPermission(SecurityPermissionFlag.UnmanagedCode).Demand();
String fulldestDirName = Path.GetFullPathInternal(path);
if (Environment.IsWin9X() && !InternalExists(Path.GetPathRoot(fulldestDirName))) // For Win9x
throw new DirectoryNotFoundException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("IO.PathNotFound_Path"), path));
if (!Win32Native.SetCurrentDirectory(fulldestDirName)) {
// If path doesn't exist, this sets last error to 2 (File
// not Found). This may potentially have worked correctly
// on Win9x, maybe.
int errorCode = Marshal.GetLastWin32Error();
if (errorCode == Win32Native.ERROR_FILE_NOT_FOUND)
errorCode = Win32Native.ERROR_PATH_NOT_FOUND;
__Error.WinIOError(errorCode, fulldestDirName);
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void Move(String sourceDirName,String destDirName) {
if (sourceDirName==null)
throw new ArgumentNullException("sourceDirName");
if (sourceDirName.Length==0)
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), "sourceDirName");
if (destDirName==null)
throw new ArgumentNullException("destDirName");
if (destDirName.Length==0)
throw new ArgumentException(Environment.GetResourceString("Argument_EmptyFileName"), "destDirName");
String fullsourceDirName = Path.GetFullPathInternal(sourceDirName);
String sourcePath = GetDemandDir(fullsourceDirName, false);
if (sourcePath.Length >= Path.MAX_DIRECTORY_PATH+1)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
String fulldestDirName = Path.GetFullPathInternal(destDirName);
String destPath = GetDemandDir(fulldestDirName, false);
if (destPath.Length >= Path.MAX_DIRECTORY_PATH+1)
throw new PathTooLongException(Environment.GetResourceString("IO.PathTooLong"));
new FileIOPermission(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, new String[] { sourcePath }, false, false ).Demand();
new FileIOPermission(FileIOPermissionAccess.Write, new String[] { destPath }, false, false ).Demand();
if (CultureInfo.InvariantCulture.CompareInfo.Compare(sourcePath, destPath, CompareOptions.IgnoreCase) == 0)
throw new IOException(Environment.GetResourceString("IO.IO_SourceDestMustBeDifferent"));
String sourceRoot = Path.GetPathRoot(sourcePath);
String destinationRoot = Path.GetPathRoot(destPath);
if (CultureInfo.InvariantCulture.CompareInfo.Compare(sourceRoot, destinationRoot, CompareOptions.IgnoreCase) != 0)
throw new IOException(Environment.GetResourceString("IO.IO_SourceDestMustHaveSameRoot"));
if (Environment.IsWin9X() && !Directory.InternalExists(Path.GetPathRoot(fulldestDirName))) // For Win9x
throw new DirectoryNotFoundException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("IO.PathNotFound_Path"), destDirName));
if (!Win32Native.MoveFile(sourceDirName, destDirName))
{
int hr = Marshal.GetLastWin32Error();
if (hr == Win32Native.ERROR_FILE_NOT_FOUND) // Source dir not found
{
hr = Win32Native.ERROR_PATH_NOT_FOUND;
__Error.WinIOError(hr, fullsourceDirName);
}
// This check was originally put in for Win9x (unfortunately without special casing it to be for Win9x only). We can't change the NT codepath now for backcomp reasons.
if (hr == Win32Native.ERROR_ACCESS_DENIED) // WinNT throws IOException. This check is for Win9x. We can't change it for backcomp.
throw new IOException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("UnauthorizedAccess_IODenied_Path"), sourceDirName), Win32Native.MakeHRFromErrorCode(hr));
__Error.WinIOError(hr, String.Empty);
}
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void Delete(String path)
{
String fullPath = Path.GetFullPathInternal(path);
Delete(fullPath, path, false);
}
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
public static void Delete(String path, bool recursive)
{
String fullPath = Path.GetFullPathInternal(path);
Delete(fullPath, path, recursive);
}
// Called from DirectoryInfo as well. FullPath is fully qualified,
// while the user path is used for feedback in exceptions.
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
internal static void Delete(String fullPath, String userPath, bool recursive)
{
String demandPath;
// If not recursive, do permission check only on this directory
// else check for the whole directory structure rooted below
demandPath = GetDemandDir(fullPath, !recursive);
// Make sure we have write permission to this directory
new FileIOPermission(FileIOPermissionAccess.Write, new String[] { demandPath }, false, false ).Demand();
// Do not recursively delete through reparse points. Perhaps in a
// future version we will add a new flag to control this behavior,
// but for now we're much safer if we err on the conservative side.
// This applies to symbolic links and mount points.
Win32Native.WIN32_FILE_ATTRIBUTE_DATA data = new Win32Native.WIN32_FILE_ATTRIBUTE_DATA();
int dataInitialised = File.FillAttributeInfo(fullPath, ref data, false, true);
if (dataInitialised != 0) {
// Ensure we throw a DirectoryNotFoundException.
if (dataInitialised == Win32Native.ERROR_FILE_NOT_FOUND)
dataInitialised = Win32Native.ERROR_PATH_NOT_FOUND;
__Error.WinIOError(dataInitialised, fullPath);
}
if (((FileAttributes)data.fileAttributes & FileAttributes.ReparsePoint) != 0)
recursive = false;
DeleteHelper(fullPath, userPath, recursive);
}
// Note that fullPath is fully qualified, while userPath may be
// relative. Use userPath for all exception messages to avoid leaking
// fully qualified path information.
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
private static void DeleteHelper(String fullPath, String userPath, bool recursive)
{
bool r;
int hr;
Exception ex = null;
// Do not recursively delete through reparse points. Perhaps in a
// future version we will add a new flag to control this behavior,
// but for now we're much safer if we err on the conservative side.
// This applies to symbolic links and mount points.
// Note the logic to check whether fullPath is a reparse point is
// in Delete(String, String, bool), and will set "recursive" to false.
// Note that Win32's DeleteFile and RemoveDirectory will just delete
// the reparse point itself.
if (recursive) {
Win32Native.WIN32_FIND_DATA data = new Win32Native.WIN32_FIND_DATA();
// Open a Find handle
using (SafeFindHandle hnd = Win32Native.FindFirstFile(fullPath+Path.DirectorySeparatorChar+"*", data)) {
if (hnd.IsInvalid) {
hr = Marshal.GetLastWin32Error();
__Error.WinIOError(hr, fullPath);
}
do {
bool isDir = (0!=(data.dwFileAttributes & Win32Native.FILE_ATTRIBUTE_DIRECTORY));
if (isDir) {
// Skip ".", "..".
if (data.cFileName.Equals(".") || data.cFileName.Equals(".."))
continue;
// Recurse for all directories, unless they are
// reparse points. Do not follow mount points nor
// symbolic links, but do delete the reparse point
// itself.
bool shouldRecurse = (0 == (data.dwFileAttributes & (int) FileAttributes.ReparsePoint));
if (shouldRecurse) {
String newFullPath = Path.InternalCombine(fullPath, data.cFileName);
String newUserPath = Path.InternalCombine(userPath, data.cFileName);
try {
DeleteHelper(newFullPath, newUserPath, recursive);
}
catch(Exception e) {
if (ex == null) {
ex = e;
}
}
}
else {
// Check to see if this is a mount point, and
// unmount it.
if (data.dwReserved0 == Win32Native.IO_REPARSE_TAG_MOUNT_POINT) {
// Use full path plus a trailing '\'
String mountPoint = Path.InternalCombine(fullPath, data.cFileName + Path.DirectorySeparatorChar);
r = Win32Native.DeleteVolumeMountPoint(mountPoint);
if (!r) {
hr = Marshal.GetLastWin32Error();
try {
__Error.WinIOError(hr, data.cFileName);
}
catch(Exception e) {
if (ex == null) {
ex = e;
}
}
}
}
// RemoveDirectory on a symbolic link will
// remove the link itself.
String reparsePoint = Path.InternalCombine(fullPath, data.cFileName);
r = Win32Native.RemoveDirectory(reparsePoint);
if (!r) {
hr = Marshal.GetLastWin32Error();
try {
__Error.WinIOError(hr, data.cFileName);
}
catch(Exception e) {
if (ex == null) {
ex = e;
}
}
}
}
}
else {
String fileName = Path.InternalCombine(fullPath, data.cFileName);
r = Win32Native.DeleteFile(fileName);
if (!r) {
hr = Marshal.GetLastWin32Error();
try {
__Error.WinIOError(hr, data.cFileName);
}
catch(Exception e) {
if (ex == null) {
ex = e;
}
}
}
}
} while (Win32Native.FindNextFile(hnd, data));
// Make sure we quit with a sensible error.
hr = Marshal.GetLastWin32Error();
}
if (ex != null)
throw ex;
if (hr!=0 && hr!=Win32Native.ERROR_NO_MORE_FILES)
__Error.WinIOError(hr, userPath);
}
r = Win32Native.RemoveDirectory(fullPath);
if (!r) {
hr = Marshal.GetLastWin32Error();
if (hr == Win32Native.ERROR_FILE_NOT_FOUND) // A dubious error code.
hr = Win32Native.ERROR_PATH_NOT_FOUND;
// This check was originally put in for Win9x (unfortunately without special casing it to be for Win9x only). We can't change the NT codepath now for backcomp reasons.
if (hr == Win32Native.ERROR_ACCESS_DENIED)
throw new IOException(String.Format(CultureInfo.CurrentCulture, Environment.GetResourceString("UnauthorizedAccess_IODenied_Path"), userPath));
__Error.WinIOError(hr, fullPath);
}
}
// WinNT only. Win9x this code will not work.
[ResourceExposure(ResourceScope.Machine)]
[ResourceConsumption(ResourceScope.Machine)]
private static SafeFileHandle OpenHandle(String path)
{
#if !FEATURE_PAL
BCLDebug.Assert((Environment.OSInfo & Environment.OSName.WinNT) == Environment.OSName.WinNT,"Not running on Winnt OS");
#endif //!FEATURE_PAL
String fullPath = Path.GetFullPathInternal(path);
String root = Path.GetPathRoot(fullPath);
if (root == fullPath && root[1] == Path.VolumeSeparatorChar)
throw new ArgumentException(Environment.GetResourceString("Arg_PathIsVolume"));
new FileIOPermission(FileIOPermissionAccess.Write, new String[] { GetDemandDir(fullPath, true) }, false, false ).Demand();
SafeFileHandle handle = Win32Native.SafeCreateFile (
fullPath,
GENERIC_WRITE,
(FileShare) (FILE_SHARE_WRITE|FILE_SHARE_DELETE),
null,
FileMode.Open,
FILE_FLAG_BACKUP_SEMANTICS,
Win32Native.NULL
);
if (handle.IsInvalid) {
int hr = Marshal.GetLastWin32Error();
__Error.WinIOError(hr, fullPath);
}
return handle;
}
private const int FILE_ATTRIBUTE_DIRECTORY = 0x00000010;
private const int GENERIC_WRITE = unchecked((int)0x40000000);
private const int FILE_SHARE_WRITE = 0x00000002;
private const int FILE_SHARE_DELETE = 0x00000004;
private const int OPEN_EXISTING = 0x00000003;
private const int FILE_FLAG_BACKUP_SEMANTICS = 0x02000000;
}
}
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