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- '\"
- '\" Copyright (c) 1993 The Regents of the University of California.
- '\" Copyright (c) 1994 Sun Microsystems, Inc.
- '\"
- '\" See the file "license.terms" for information on usage and redistribution
- '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- '\"
- '\" @(#) seek.n 1.2 94/12/17 16:18:46
- '\"
- .so man.macros
- .HS seek tcl
- .BS
- '\" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- seek \- Change the access position for an open file
- .SH SYNOPSIS
- \fBseek \fIfileId offset \fR?\fIorigin\fR?
- .BE
-
- .SH DESCRIPTION
- .PP
- Change the current access position for \fIfileId\fR.
- \fIFileId\fR must have been the return
- value from a previous call to \fBopen\fR, or it may be \fBstdin\fR,
- \fBstdout\fR, or \fBstderr\fR to refer to one of the standard I/O
- channels.
- The \fIoffset\fR and \fIorigin\fR arguments specify the position at
- which the next read or write will occur for \fIfileId\fR.
- \fIOffset\fR must be an integer (which may be negative) and \fIorigin\fR
- must be one of the following:
- .TP
- \fBstart\fR
- The new access position will be \fIoffset\fR bytes from the start
- of the file.
- .TP
- \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 file.
- .TP
- \fBend\fR
- The new access position will be \fIoffset\fR bytes from the end of
- the file. 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.
- .LP
- The \fIorigin\fR argument defaults to \fBstart\fR.
- This command returns an empty string.
-
- .SH KEYWORDS
- access position, file, seek
-