tell




NAME
       tell - Return current access position for an open channel

SYNOPSIS
       tell channelId


DESCRIPTION
       Returns  an  integer string giving the current access position in chan-        nelId.  This value returned is a byte offset that can be passed to seek        in  order  to set the channel to a particular position.  Note that this        value is in terms of  bytes,  not  characters  like  read.   The  value
       returned is -1 for channels that do not support seeking.

       ChannelId must be an identifier for an open channel such as a Tcl stan-        dard channel (stdin, stdout, or stderr), the return value from an invo-        cation  of  open or socket, or the result of a channel creation command        provided by a Tcl extension.


SEE ALSO
       file(n), open(n), close(n), gets(n), seek(n), Tcl_StandardChannels(3)


KEYWORDS
       access position, channel, seeking



Tcl                                   8.1                              tell(n)