NAME
       tell - Return current access position for an open channel

SYNOPSIS
       tell channelId


DESCRIPTION
       Returns  an integer string giving the current access posi-
       tion in channelId.  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 standard channel (stdin, stdout, or stderr), the
       return value from an invocation 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_Stan-
       dardChannels(3)


KEYWORDS
