/// <summary>
/// Initializes a new instance of the <see cref="System.IO.FileStream" /> class with the specified path, creation mode, read/write and sharing permission, the access other FileStreams can have to the same file, the buffer size, additional file options and the allocation size.
/// </summary>
/// <param name="path">A relative or absolute path for the file that the current <see cref="System.IO.FileStream" /> instance will encapsulate.</param>
/// <param name="options">An object that describes optional <see cref="System.IO.FileStream" /> parameters to use.</param>
/// <exception cref="T:System.ArgumentNullException"><paramref name="path" /> or <paramref name="options" /> is <see langword="null" />.</exception>
/// <exception cref="T:System.ArgumentException"><paramref name="path" /> is an empty string (""), contains only white space, or contains one or more invalid characters.
/// -or-
/// <paramref name="path" /> refers to a non-file device, such as <c>CON:</c>, <c>COM1:</c>, <c>LPT1:</c>, etc. in an NTFS environment.</exception>
/// <exception cref="T:System.NotSupportedException"><paramref name="path" /> refers to a non-file device, such as <c>CON:</c>, <c>COM1:</c>, <c>LPT1:</c>, etc. in a non-NTFS environment.</exception>
/// <exception cref="T:System.IO.FileNotFoundException">The file cannot be found, such as when <see cref="System.IO.FileStreamOptions.Mode" /> is <see langword="FileMode.Truncate" /> or <see langword="FileMode.Open" />, and the file specified by <paramref name="path" /> does not exist. The file must already exist in these modes.</exception>
/// <exception cref="T:System.IO.IOException">An I/O error, such as specifying <see langword="FileMode.CreateNew" /> when the file specified by <paramref name="path" /> already exists, occurred.
/// -or-
/// The stream has been closed.
/// -or-
/// The disk was full (when <see cref="System.IO.FileStreamOptions.PreallocationSize" /> was provided and <paramref name="path" /> was pointing to a regular file).
/// -or-
/// The file was too large (when <see cref="System.IO.FileStreamOptions.PreallocationSize" /> was provided and <paramref name="path" /> was pointing to a regular file).</exception>
/// <exception cref="T:System.Security.SecurityException">The caller does not have the required permission.</exception>
/// <exception cref="T:System.IO.DirectoryNotFoundException">The specified path is invalid, such as being on an unmapped drive.</exception>
/// <exception cref="T:System.UnauthorizedAccessException">The <see cref="System.IO.FileStreamOptions.Access" /> requested is not permitted by the operating system for the specified <paramref name="path" />, such as when <see cref="System.IO.FileStreamOptions.Access" /> is <see cref="System.IO.FileAccess.Write" /> or <see cref="System.IO.FileAccess.ReadWrite" /> and the file or directory is set for read-only access.
/// -or-
/// <see cref="F:System.IO.FileOptions.Encrypted" /> is specified for <see cref="System.IO.FileStreamOptions.Options" /> , but file encryption is not supported on the current platform.</exception>
/// <exception cref="T:System.IO.PathTooLongException">The specified path, file name, or both exceed the system-defined maximum length. </exception>
public FileStream(string path, FileStreamOptions options)
{
ArgumentException.ThrowIfNullOrEmpty(path);
ArgumentNullException.ThrowIfNull(options);
if ((options.Access & FileAccess.Read) != 0 && options.Mode == FileMode.Append)
{
throw new ArgumentException(SR.Argument_InvalidAppendMode, nameof(options));
}
else if ((options.Access & FileAccess.Write) == 0)
{
if (options.Mode == FileMode.Truncate || options.Mode == FileMode.CreateNew || options.Mode == FileMode.Create || options.Mode == FileMode.Append)
{
throw new ArgumentException(SR.Format(SR.Argument_InvalidFileModeAndAccessCombo, options.Mode, options.Access), nameof(options));
}
}
if (options.PreallocationSize > 0)
{
FileStreamHelpers.ValidateArgumentsForPreallocation(options.Mode, options.Access);
}
if (options.UnixCreateMode.HasValue)
{
// Only allow UnixCreateMode for file modes that can create a new file.
if (options.Mode == FileMode.Truncate || options.Mode == FileMode.Open)
{
throw new ArgumentException(SR.Argument_InvalidUnixCreateMode, nameof(options));
}
}
FileStreamHelpers.SerializationGuard(options.Access);
_strategy = FileStreamHelpers.ChooseStrategy(
this, path, options.Mode, options.Access, options.Share, options.BufferSize, options.Options, options.PreallocationSize, options.UnixCreateMode);
}
/// <summary>
/// Initializes a new instance of the <see cref="System.IO.FileStream" /> class with the specified path, creation mode, read/write and sharing permission, the access other FileStreams can have to the same file, the buffer size, additional file options and the allocation size.
/// </summary>
/// <param name="path">A relative or absolute path for the file that the current <see cref="System.IO.FileStream" /> instance will encapsulate.</param>
/// <param name="options">An object that describes optional <see cref="System.IO.FileStream" /> parameters to use.</param>
/// <exception cref="T:System.ArgumentNullException"><paramref name="path" /> or <paramref name="options" /> is <see langword="null" />.</exception>
/// <exception cref="T:System.ArgumentException"><paramref name="path" /> is an empty string (""), contains only white space, or contains one or more invalid characters.
/// -or-
/// <paramref name="path" /> refers to a non-file device, such as <c>CON:</c>, <c>COM1:</c>, <c>LPT1:</c>, etc. in an NTFS environment.</exception>
/// <exception cref="T:System.NotSupportedException"><paramref name="path" /> refers to a non-file device, such as <c>CON:</c>, <c>COM1:</c>, <c>LPT1:</c>, etc. in a non-NTFS environment.</exception>
/// <exception cref="T:System.IO.FileNotFoundException">The file cannot be found, such as when <see cref="System.IO.FileStreamOptions.Mode" /> is <see langword="FileMode.Truncate" /> or <see langword="FileMode.Open" />, and the file specified by <paramref name="path" /> does not exist. The file must already exist in these modes.</exception>
/// <exception cref="T:System.IO.IOException">An I/O error, such as specifying <see langword="FileMode.CreateNew" /> when the file specified by <paramref name="path" /> already exists, occurred.
/// -or-
/// The stream has been closed.
/// -or-
/// The disk was full (when <see cref="System.IO.FileStreamOptions.PreallocationSize" /> was provided and <paramref name="path" /> was pointing to a regular file).
/// -or-
/// The file was too large (when <see cref="System.IO.FileStreamOptions.PreallocationSize" /> was provided and <paramref name="path" /> was pointing to a regular file).</exception>
/// <exception cref="T:System.Security.SecurityException">The caller does not have the required permission.</exception>
/// <exception cref="T:System.IO.DirectoryNotFoundException">The specified path is invalid, such as being on an unmapped drive.</exception>
/// <exception cref="T:System.UnauthorizedAccessException">The <see cref="System.IO.FileStreamOptions.Access" /> requested is not permitted by the operating system for the specified <paramref name="path" />, such as when <see cref="System.IO.FileStreamOptions.Access" /> is <see cref="System.IO.FileAccess.Write" /> or <see cref="System.IO.FileAccess.ReadWrite" /> and the file or directory is set for read-only access.
/// -or-
/// <see cref="F:System.IO.FileOptions.Encrypted" /> is specified for <see cref="System.IO.FileStreamOptions.Options" /> , but file encryption is not supported on the current platform.</exception>
/// <exception cref="T:System.IO.PathTooLongException">The specified path, file name, or both exceed the system-defined maximum length. </exception>
public FileStream(string path, FileStreamOptions options)
{
if (path is null)
{
throw new ArgumentNullException(nameof(path), SR.ArgumentNull_Path);
}
else if (path.Length == 0)
{
throw new ArgumentException(SR.Argument_EmptyPath, nameof(path));
}
else if (options is null)
{
throw new ArgumentNullException(nameof(options));
}
else if ((options.Access & FileAccess.Read) != 0 && options.Mode == FileMode.Append)
{
throw new ArgumentException(SR.Argument_InvalidAppendMode, nameof(options));
}
else if ((options.Access & FileAccess.Write) == 0)
{
if (options.Mode == FileMode.Truncate || options.Mode == FileMode.CreateNew || options.Mode == FileMode.Create || options.Mode == FileMode.Append)
{
throw new ArgumentException(SR.Format(SR.Argument_InvalidFileModeAndAccessCombo, options.Mode, options.Access), nameof(options));
}
}
else if ((options.Access & FileAccess.Write) == FileAccess.Write)
{
SerializationInfo.ThrowIfDeserializationInProgress("AllowFileWrites", ref s_cachedSerializationSwitch);
}
_strategy = FileStreamHelpers.ChooseStrategy(
this, path, options.Mode, options.Access, options.Share, options.BufferSize, options.Options, options.PreallocationSize);
}
internal BufferedFileStreamStrategy(FileStreamStrategy strategy, int bufferSize)
{
Debug.Assert(bufferSize > 1);
_strategy = strategy;
_bufferSize = bufferSize;
}
public FileStream(IntPtr handle, FileAccess access, bool ownsHandle, int bufferSize, bool isAsync)
{
SafeFileHandle safeHandle = new SafeFileHandle(handle, ownsHandle: ownsHandle);
try
{
ValidateHandle(safeHandle, access, bufferSize, isAsync);
_strategy = FileStreamHelpers.ChooseStrategy(this, safeHandle, access, DefaultShare, bufferSize, isAsync);
}
catch
{
// We don't want to take ownership of closing passed in handles
// *unless* the constructor completes successfully.
GC.SuppressFinalize(safeHandle);
// This would also prevent Close from being called, but is unnecessary
// as we've removed the object from the finalizer queue.
//
// safeHandle.SetHandleAsInvalid();
throw;
}
}
/// <summary>
/// Initializes a new instance of the <see cref="System.IO.FileStream" /> class with the specified path, creation mode, read/write and sharing permission, the access other FileStreams can have to the same file, the buffer size, additional file options and the allocation size.
/// </summary>
/// <param name="path">A relative or absolute path for the file that the current <see cref="System.IO.FileStream" /> instance will encapsulate.</param>
/// <param name="options">An object that describes optional <see cref="System.IO.FileStream" /> parameters to use.</param>
/// <exception cref="T:System.ArgumentNullException"><paramref name="path" /> or <paramref name="options" /> is <see langword="null" />.</exception>
/// <exception cref="T:System.ArgumentException"><paramref name="path" /> is an empty string (""), contains only white space, or contains one or more invalid characters.
/// -or-
/// <paramref name="path" /> refers to a non-file device, such as <c>CON:</c>, <c>COM1:</c>, <c>LPT1:</c>, etc. in an NTFS environment.</exception>
/// <exception cref="T:System.NotSupportedException"><paramref name="path" /> refers to a non-file device, such as <c>CON:</c>, <c>COM1:</c>, <c>LPT1:</c>, etc. in a non-NTFS environment.</exception>
/// <exception cref="T:System.IO.FileNotFoundException">The file cannot be found, such as when <see cref="System.IO.FileStreamOptions.Mode" /> is <see langword="FileMode.Truncate" /> or <see langword="FileMode.Open" />, and the file specified by <paramref name="path" /> does not exist. The file must already exist in these modes.</exception>
/// <exception cref="T:System.IO.IOException">An I/O error, such as specifying <see langword="FileMode.CreateNew" /> when the file specified by <paramref name="path" /> already exists, occurred.
/// -or-
/// The stream has been closed.
/// -or-
/// The disk was full (when <see cref="System.IO.FileStreamOptions.PreallocationSize" /> was provided and <paramref name="path" /> was pointing to a regular file).
/// -or-
/// The file was too large (when <see cref="System.IO.FileStreamOptions.PreallocationSize" /> was provided and <paramref name="path" /> was pointing to a regular file).</exception>
/// <exception cref="T:System.Security.SecurityException">The caller does not have the required permission.</exception>
/// <exception cref="T:System.IO.DirectoryNotFoundException">The specified path is invalid, such as being on an unmapped drive.</exception>
/// <exception cref="T:System.UnauthorizedAccessException">The <see cref="System.IO.FileStreamOptions.Access" /> requested is not permitted by the operating system for the specified <paramref name="path" />, such as when <see cref="System.IO.FileStreamOptions.Access" /> is <see cref="System.IO.FileAccess.Write" /> or <see cref="System.IO.FileAccess.ReadWrite" /> and the file or directory is set for read-only access.
/// -or-
/// <see cref="F:System.IO.FileOptions.Encrypted" /> is specified for <see cref="System.IO.FileStreamOptions.Options" /> , but file encryption is not supported on the current platform.</exception>
/// <exception cref="T:System.IO.PathTooLongException">The specified path, file name, or both exceed the system-defined maximum length. </exception>
public FileStream(string path, FileStreamOptions options)
{
if (path is null)
{
throw new ArgumentNullException(nameof(path), SR.ArgumentNull_Path);
}
else if (path.Length == 0)
{
throw new ArgumentException(SR.Argument_EmptyPath, nameof(path));
}
else if (options is null)
{
throw new ArgumentNullException(nameof(options));
}
else if ((options.Access & FileAccess.Read) != 0 && options.Mode == FileMode.Append)
{
throw new ArgumentException(SR.Argument_InvalidAppendMode, nameof(options));
}
else if ((options.Access & FileAccess.Write) == 0)
{
if (options.Mode == FileMode.Truncate || options.Mode == FileMode.CreateNew || options.Mode == FileMode.Create || options.Mode == FileMode.Append)
{
throw new ArgumentException(SR.Format(SR.Argument_InvalidFileModeAndAccessCombo, options.Mode, options.Access), nameof(options));
}
}
if (options.PreallocationSize > 0)
{
FileStreamHelpers.ValidateArgumentsForPreallocation(options.Mode, options.Access);
}
FileStreamHelpers.SerializationGuard(options.Access);
_strategy = FileStreamHelpers.ChooseStrategy(
this, path, options.Mode, options.Access, options.Share, options.BufferSize, options.Options, options.PreallocationSize);
}
private FileStream(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize, FileOptions options, long preallocationSize)
{
FileStreamHelpers.ValidateArguments(path, mode, access, share, bufferSize, options, preallocationSize);
_strategy = FileStreamHelpers.ChooseStrategy(this, path, mode, access, share, bufferSize, options, preallocationSize, unixCreateMode: null);
}
public FileStream(SafeFileHandle handle, FileAccess access, int bufferSize, bool isAsync)
{
ValidateHandle(handle, access, bufferSize, isAsync);
_strategy = FileStreamHelpers.ChooseStrategy(this, handle, access, bufferSize, isAsync);
}
public FileStream(string path, FileMode mode, FileAccess access, FileShare share, int bufferSize, FileOptions options)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path), SR.ArgumentNull_Path);
}
else if (path.Length == 0)
{
throw new ArgumentException(SR.Argument_EmptyPath, nameof(path));
}
// don't include inheritable in our bounds check for share
FileShare tempshare = share & ~FileShare.Inheritable;
string? badArg = null;
if (mode < FileMode.CreateNew || mode > FileMode.Append)
{
badArg = nameof(mode);
}
else if (access < FileAccess.Read || access > FileAccess.ReadWrite)
{
badArg = nameof(access);
}
else if (tempshare < FileShare.None || tempshare > (FileShare.ReadWrite | FileShare.Delete))
{
badArg = nameof(share);
}
if (badArg != null)
{
throw new ArgumentOutOfRangeException(badArg, SR.ArgumentOutOfRange_Enum);
}
// NOTE: any change to FileOptions enum needs to be matched here in the error validation
if (options != FileOptions.None && (options & ~(FileOptions.WriteThrough | FileOptions.Asynchronous | FileOptions.RandomAccess | FileOptions.DeleteOnClose | FileOptions.SequentialScan | FileOptions.Encrypted | (FileOptions)0x20000000 /* NoBuffering */)) != 0)
{
throw new ArgumentOutOfRangeException(nameof(options), SR.ArgumentOutOfRange_Enum);
}
else if (bufferSize <= 0)
{
throw new ArgumentOutOfRangeException(nameof(bufferSize), SR.ArgumentOutOfRange_NeedPosNum);
}
// Write access validation
if ((access & FileAccess.Write) == 0)
{
if (mode == FileMode.Truncate || mode == FileMode.CreateNew || mode == FileMode.Create || mode == FileMode.Append)
{
// No write access, mode and access disagree but flag access since mode comes first
throw new ArgumentException(SR.Format(SR.Argument_InvalidFileModeAndAccessCombo, mode, access), nameof(access));
}
}
if ((access & FileAccess.Read) != 0 && mode == FileMode.Append)
{
throw new ArgumentException(SR.Argument_InvalidAppendMode, nameof(access));
}
else if ((access & FileAccess.Write) == FileAccess.Write)
{
SerializationInfo.ThrowIfDeserializationInProgress("AllowFileWrites", ref s_cachedSerializationSwitch);
}
_strategy = FileStreamHelpers.ChooseStrategy(this, path, mode, access, share, bufferSize, options);
}
private FileStreamStrategy WrapIfDerivedType(FileStreamStrategy impl) => GetType() == typeof(FileStream) ? impl : new DerivedFileStreamStrategy(this, impl);
public FileStream(SafeFileHandle handle, FileAccess access, int bufferSize, bool isAsync)
{
ValidateHandle(handle, access, bufferSize, isAsync);
_strategy = WrapIfDerivedType(FileStreamHelpers.ChooseStrategy(handle, access, bufferSize, isAsync));
}
internal DerivedFileStreamStrategy(FileStream fileStream, FileStreamStrategy strategy)
{
_fileStream = fileStream;
_strategy = strategy;
}
internal DerivedFileStreamStrategy(FileStream fileStream, FileStreamStrategy strategy) : base(fileStream) => _strategy = strategy;
public FileStream(SafeFileHandle handle, FileAccess access, int bufferSize)
{
ValidateHandle(handle, access, bufferSize);
_strategy = FileStreamHelpers.ChooseStrategy(this, handle, access, DefaultShare, bufferSize, handle.IsAsync);
}
