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tell(n) Tcl Built-In Commands tell(n)
tell - Return current access position for an open channel
Returns an integer string giving the current access position in channelId. This value |
returned is a byte offset that can be passed to seek in order to set the channel to a par- |
ticular 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.
file(n), open(n), close(n), gets(n), seek(n), Tcl_StandardChannels(3)
access position, channel, seeking
Tcl 8.1 tell(n)
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