TElSFTPServer.OnBlock event

TElSFTPServer.OnBlock

This event is fired when a byte-range lock on the file is requested

Declaration

[C#]
event TElSFTPServerBlockEvent OnBlock;
delegate void TElSFTPServerBlockEvent(Object Sender, Object Data, long Offset, long Length, TSBSftpFileOpenAccess LockMask, ref int ErrorCode, ref string Comment);

[VB.NET]
Event OnBlock As TElSFTPServerBlockEvent
Delegate Sub TElSFTPServerBlockEvent(ByVal Sender As Object, ByVal Data As Object, ByVal Offset As Long, ByVal Length As Long, ByVal LockMask As TSBSftpFileOpenAccess, ByRef ErrorCode As Integer, ByRef Comment As String)

[Pascal]
    property OnBlock : TElSFTPServerBlockEvent;
    TElSFTPServerBlockEvent = procedure(Sender : TObject; Data : pointer; Offset, Length : Int64; LockMask : TSBSftpFileOpenAccess; var ErrorCode : integer; var Comment : string) of object;

    TSBSftpFileOpenAccess = set of TSBSftpFileOpenAccessItem;

[C++]
    void get_OnBlock(TElSFTPServerBlockEvent &pMethodOutResult, void * &pDataOutResult);
    void set_OnBlock(TElSFTPServerBlockEvent pMethodValue, void * pDataValue);
    typedef void (SB_CALLBACK *TElSFTPServerBlockEvent)(void * _ObjectData, TObjectHandle Sender, void * Data, int64_t Offset, int64_t Length, TSBSftpFileOpenAccessRaw LockMask, int32_t &ErrorCode, char * pcComment, int32_t &szComment);

[PHP]
    TElSFTPServerBlockEvent|callable|NULL get_OnBlock()
    void set_OnBlock(TElSFTPServerBlockEvent|callable|NULL $Value)
    callable TElSFTPServerBlockEvent(TObject $Sender, TSBPointer|NULL $Data, integer $Offset, integer $Length, integer $LockMask, integer &$ErrorCode, string &$Comment)

[Java]
    TElSFTPServerBlockEvent getOnBlock();
    void setOnBlock(TElSFTPServerBlockEvent Value);
    TElSFTPServerBlockEvent.Callback OnBlock = new TElSFTPServerBlockEvent.Callback() {
        public void TElSFTPServerBlockEventCallback(TObject Sender, TObject Data, long Offset, long Length, int LockMask, TSBInteger ErrorCode, TSBString Comment) {
            //...
        }
    }

Parameters

Data - the open file
Offset - beginning of the byte-range to lock.
Length - number of bytes in the range to lock. The special value 0 means lock from Offset to the end of the file.
LockMask - flags managing blocking process
ErrorCode - the error code, see values below
Comment - server comment
pcComment - server comment
szComment - the length of pcComment.

TSBSftpFileOpenAccess values:

[.NET]	[Pascal]	[C++]	Description
faReadLock = 1	faReadLock	f_faReadLock = 1	No other handle has been opened for reading andno other handle will be opened for reading until the client closes the handle.However other handle can be opened for any other access but reading
faWriteLock = 2	faWriteLock	f_faWriteLock = 2	No other handle has been opened for writing or appending andno other handle will be opened for writing or appending until the client closes the handle.However other handle can be opened for any other access but writing or appending
faDeleteLock = 4	faDeleteLock	f_faDeleteLock = 4	No other handle has been opened for deleting or with delete on close flag andno other handle will be opened deleting or with delete on close flag until the client closes the handle
faBlockAdvisory = 8	faBlockAdvisory	f_faBlockAdvisory = 8	If this bit is set, the above block modes are advisory.In advisory mode, only other accesses that specify a block mode need to be consideredwhen determining whether the block access can be granted

Error codes values:

Definition	Value	Description
SSH_ERROR_WRONG_MODE	-1 (0xFFFFFFFF)	Attempt to call synchronous method in asynchronous mode and vice versa
SSH_ERROR_OK	0 (0x0000)	Indicates successful completion of the operation
SSH_ERROR_EOF	1 (0x0001)	indicates end-of-file condition; Read: no more data is available in the file; ReadDirectory: no more files are contained in the directory
SSH_ERROR_NO_SUCH_FILE	2 (0x0002)	A reference is made to a file which does not exist
SSH_ERROR_PERMISSION_DENIED	3 (0x0003)	the authenticated user does not have sufficient permissions to perform the operation
SSH_ERROR_FAILURE	4 (0x0004)	An error occurred for which there is no more specific error code defined
SSH_ERROR_BAD_MESSAGE	5 (0x0005)	A badly formatted packet or protocol incompatibility is detected
SSH_ERROR_NO_CONNECTION	6 (0x0006)	A pseudo-error which indicates that the client has no connection to the server
SSH_ERROR_CONNECTION_LOST	7 (0x0007)	A pseudo-error which indicates that the connection to the server has been lost
SSH_ERROR_OP_UNSUPPORTED	8 (0x0008)	An attempt was made to perform an operation which is not supported for the server
SSH_ERROR_INVALID_HANDLE	9 (0x0009)	The handle value was invalid
SSH_ERROR_NO_SUCH_PATH	10 (0x000A)	The file path does not exist or is invalid
SSH_ERROR_FILE_ALREADY_EXISTS	11 (0x000B)	The file already exists
SSH_ERROR_WRITE_PROTECT	12 (0x000C)	The file is on read only media, or the media is write protected
SSH_ERROR_NO_MEDIA	13 (0x000D)	The requested operation can not be completed because there is no media available in the drive
SSH_ERROR_NO_SPACE_ON_FILESYSTEM	14 (0x000E)	The requested operation cannot be completed because there is no free space on the filesystem
SSH_ERROR_QUOTA_EXCEEDED	15 (0x000F)	The operation cannot be completed because it would exceed the user's storage quota
SSH_ERROR_UNKNOWN_PRINCIPAL	16 (0x0010)	A principal referenced by the request (either the ‘owner’,‘group’, or ‘who’ field of an ACL), was unknown
SSH_ERROR_LOCK_CONFLICT	17 (0x0011)	The file could not be opened because it is locked by another process
SSH_ERROR_DIR_NOT_EMPTY	18 (0x0012)	The directory is not empty
SSH_ERROR_NOT_A_DIRECTORY	19 (0x0013)	The specified file is not a directory
SSH_ERROR_INVALID_FILENAME	20 (0x0014)	The filename is not valid
SSH_ERROR_LINK_LOOP	21 (0x0015)	Too many symbolic links encountered
SSH_ERROR_CANNOT_DELETE	22 (0x0016)	The file cannot be deleted. One possible reason is that the advisory READONLY attribute-bit is set
SSH_ERROR_INVALID_PARAMETER	23 (0x0017)	On of the parameters was out of range, or the parameters specified cannot be used together
SSH_ERROR_FILE_IS_A_DIRECTORY	24 (0x0018)	The specified file was a directory in a context where a directory cannot be used
SSH_ERROR_BYTE_RANGE_LOCK_CONFLICT	25 (0x0019)	A read or write operation failed because another process's mandatory byte-range lock overlaps with the request
SSH_ERROR_BYTE_RANGE_LOCK_REFUSED	26 (0x001A)	A request for a byte range lock was refused
SSH_ERROR_DELETE_PENDING	27 (0x001B)	An operation was attempted on a file for which a delete operation is pending
SSH_ERROR_FILE_CORRUPT	28 (0x001C)	The file is corrupt; an filesystem integrity check should be run
SSH_ERROR_OWNER_INVALID	29 (0x001D)	The principal specified can not be assigned as an owner of a file
SSH_ERROR_GROUP_INVALID	30 (0x001E)	The principal specified can not be assigned as the primary group of a file
SSH_ERROR_UNSUPPORTED_VERSION	100 (0x0064)	Sets of supported by client and server versions has no intersection
SSH_ERROR_INVALID_PACKET	101 (0x0065)	Invalid packet was received
SSH_ERROR_TUNNEL_ERROR	102 (0x0066)	Error is on the SSH-protocol level. The connection is closed because of SSH error
SSH_ERROR_CONNECTION_CLOSED	103 (0x0067)	Connection is closed
SSH_ERROR_UNSUPPORTED_ACTION	104 (0x0068)	…
SSH_ERROR_NOT_A_TEXT_HANDLE	105 (0x0069)	…
SSH_ERROR_CANCELLED_BY_USER	106 (0x006A)	…

TSBSftpFileOpenAccessRaw values

[.NET][C++]	[Pascal]	[PHP]	Description
f_faReadLock = 1	faReadLock	faReadLock = 1	...
f_faWriteLock = 2	faWriteLock	faWriteLock = 2	...
f_faDeleteLock = 4	faDeleteLock	faDeleteLock = 4	...
f_faBlockAdvisory = 8	faBlockAdvisory	faBlockAdvisory = 8	...

Description

This event is fired when a byte-range lock on the file is requested