69 lines
2.7 KiB
Groff
69 lines
2.7 KiB
Groff
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'\"
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'\" Copyright (c) 1993 The Regents of the University of California.
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'\" All rights reserved.
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'\"
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'\" Permission is hereby granted, without written agreement and without
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'\" license or royalty fees, to use, copy, modify, and distribute this
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'\" documentation for any purpose, provided that the above copyright
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'\" notice and the following two paragraphs appear in all copies.
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'\"
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'\" IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
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'\" FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
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'\" ARISING OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF THE UNIVERSITY OF
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'\" CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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'\"
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'\" THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
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'\" INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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'\" AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
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'\" ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO
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'\" PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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'\"
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'\" $Header: /user6/ouster/tcl/man/RCS/AppInit.3,v 1.2 93/06/07 15:11:46 ouster Exp $ SPRITE (Berkeley)
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'\"
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.so man.macros
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.HS Tcl_AppInit tclc 7.0
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.BS
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.SH NAME
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Tcl_AppInit \- Perform application-specific initialization
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.SH SYNOPSIS
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.nf
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\fB#include <tcl.h>\fR
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.sp
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\fBTcl_AppInit\fR(\fIinterp\fR)
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.SH ARGUMENTS
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.AS Tcl_Interp *interp
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.AP Tcl_Interp *interp in
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Interpreter for the application.
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.BE
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.SH DESCRIPTION
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.PP
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\fBTcl_AppInit\fR is a procedure that is invoked by the main programs
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for Tcl applications such as \fBtclsh\fR and \fBwish\fR.
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Its purpose is to allow new Tcl applications to be created without
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modifying existing main programs such as those for \fBtclsh\fR
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and \fBwish\fR.
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To create a new application simply write a new version of
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\fBTcl_AppInit\fR to replace the default version provided by Tcl,
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then link your new \fBTcl_AppInit\fR with the Tcl library, which
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contains the main program from \fBtclsh\fR (be sure to specify the
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switch ``\fB\-u _main\fR'' to the linker to force it to use the
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version of \fBmain\fR from the Tcl library).
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.PP
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\fBTcl_AppInit\fR is invoked after other initialization in
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\fBmain\fR and before entering the main loop to process commands.
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Here are some examples of things that \fBTcl_AppInit\fR might do:
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.IP [1]
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Call initialization procedures for various packages used by
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the application.
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Each initialization procedure adds new commands to \fIinterp\fR
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for its package and performs other package-specific initialization.
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.IP [2]
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Process command-line arguments, which can be accessed from the
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Tcl variables \fBargv\fR and \fBargv0\fR in \fIinterp\fR.
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.IP [3]
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Invoke a startup script to initialize the application.
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.SH KEYWORDS
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application, argument, command, initialization, interpreter
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