exit.n
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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.
- '"
- '" RCS: @(#) $Id: exit.n,v 1.3.18.1 2004/10/27 09:35:38 dkf Exp $
- '"
- .so man.macros
- .TH exit n "" Tcl "Tcl Built-In Commands"
- .BS
- '" Note: do not modify the .SH NAME line immediately below!
- .SH NAME
- exit - End the application
- .SH SYNOPSIS
- fBexit fR?fIreturnCodefR?
- .BE
- .SH DESCRIPTION
- .PP
- Terminate the process, returning fIreturnCodefR to the
- system as the exit status.
- If fIreturnCodefR isn't specified then it defaults
- to 0.
- .SH EXAMPLE
- Since non-zero exit codes are usually interpreted as error cases by
- the calling process, the fBexitfR command is an important part of
- signalling that something fatal has gone wrong. This code fragment is
- useful in scripts to act as a general problem trap:
- .CS
- proc main {} {
- # ... put the real main code in here ...
- }
- if {[catch {main} msg]} {
- puts stderr "unexpected script error: $msg"
- if {[info exist env(DEBUG)]} {
- puts stderr "---- BEGIN TRACE ----"
- puts stderr $errorInfo
- puts stderr "---- END TRACE ----"
- }
- # Reserve code 1 for "expected" error exits...
- fBexitfR 2
- }
- .CE
- .SH "SEE ALSO"
- exec(n), tclvars(n)
- .SH KEYWORDS
- exit, process