tell man page on OpenDarwin

tell man page on OpenDarwin

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tell(n)			     Tcl Built-In Commands		       tell(n)

______________________________________________________________________________

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)

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