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-'\"
-'\" Copyright (c) 1993 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\" 
-.TH seek n 8.1 Tcl "Tcl Built-In Commands"
-.so man.macros
-.BS
-'\" Note:  do not modify the .SH NAME line immediately below!
-.SH NAME
-seek \- Change the access position for an open channel
-.SH SYNOPSIS
-\fBseek \fIchannelId offset \fR?\fIorigin\fR?
-.BE
-.SH DESCRIPTION
-.PP
-Changes the current access position for \fIchannelId\fR.
-.PP
-\fIChannelId\fR must be an identifier for an open channel such as a
-Tcl standard channel (\fBstdin\fR, \fBstdout\fR, or \fBstderr\fR),
-the return value from an invocation of \fBopen\fR or \fBsocket\fR, or
-the result of a channel creation command provided by a Tcl extension.
-.PP
-The \fIoffset\fR and \fIorigin\fR
-arguments specify the position at which the next read or write will occur
-for \fIchannelId\fR. \fIOffset\fR must be an integer (which may be
-negative) and \fIorigin\fR must be one of the following:
-.TP 10
-\fBstart\fR
-.
-The new access position will be \fIoffset\fR bytes from the start
-of the underlying file or device.
-.TP 10
-\fBcurrent\fR
-.
-The new access position will be \fIoffset\fR bytes from the current
-access position; a negative \fIoffset\fR moves the access position
-backwards in the underlying file or device.
-.TP 10
-\fBend\fR
-.
-The new access position will be \fIoffset\fR bytes from the end of
-the file or device.  A negative \fIoffset\fR places the access position
-before the end of file, and a positive \fIoffset\fR places the access
-position after the end of file.
-.PP
-The \fIorigin\fR argument defaults to \fBstart\fR.
-.PP
-The command flushes all buffered output for the channel before the command
-returns, even if the channel is in non-blocking mode.
-It also discards any buffered and unread input.
-This command returns an empty string.
-An error occurs if this command is applied to channels whose underlying
-file or device does not support seeking.
-.PP
-Note that \fIoffset\fR values are byte offsets, not character
-offsets.  Both \fBseek\fR and \fBtell\fR operate in terms of bytes,
-not characters, unlike \fBread\fR.
-.SH EXAMPLES
-.PP
-Read a file twice:
-.PP
-.CS
-set f [open file.txt]
-set data1 [read $f]
-\fBseek\fR $f 0
-set data2 [read $f]
-close $f
-# $data1 eq $data2 if the file wasn't updated
-.CE
-.PP
-Read the last 10 bytes from a file:
-.PP
-.CS
-set f [open file.data]
-# This is guaranteed to work with binary data but
-# may fail with other encodings...
-fconfigure $f -translation binary
-\fBseek\fR $f -10 end
-set data [read $f 10]
-close $f
-.CE
-.SH "SEE ALSO"
-file(n), open(n), close(n), gets(n), tell(n), Tcl_StandardChannels(3)
-.SH KEYWORDS
-access position, file, seek
-'\" Local Variables:
-'\" mode: nroff
-'\" fill-column: 78
-'\" End: