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/* $Header$ */
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/*
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* tclMain.c --
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*
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* Main program for Tcl shells and other Tcl-based applications.
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*
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* Copyright (c) 1988-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tclmain.c,v 1.2 2001/10/07 01:32:29 dtashley Exp $
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*/
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#define MODULE_TCLMAIN
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#include "tclmain.h"
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#include "tcl.h"
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#include "tclInt.h"
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#include "build_config.h"
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#include "extninit.h"
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#include "msgstrs.h"
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# undef TCL_STORAGE_CLASS
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# define TCL_STORAGE_CLASS DLLEXPORT
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/*
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* The following code ensures that tclLink.c is linked whenever
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* Tcl is linked. Without this code there's no reference to the
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* code in that file from anywhere in Tcl, so it may not be
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* linked into the application.
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*/
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EXTERN int Tcl_LinkVar();
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int (*tclDummyLinkVarPtr)() = Tcl_LinkVar;
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/*
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* Declarations for various library procedures and variables (don't want
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* to include tclPort.h here, because people might copy this file out of
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* the Tcl source directory to make their own modified versions).
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* Note: "exit" should really be declared here, but there's no way to
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* declare it without causing conflicts with other definitions elsewher
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* on some systems, so it's better just to leave it out.
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*/
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extern int isatty _ANSI_ARGS_((int fd));
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extern char * strcpy _ANSI_ARGS_((char *dst, CONST char *src));
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static char *tclStartupScriptFileName = NULL;
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/*
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*----------------------------------------------------------------------
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*
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* TclSetStartupScriptFileName --
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*
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* Primes the startup script file name, used to override the
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* command line processing.
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*
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* Results:
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* None.
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*
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* Side effects:
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* This procedure initializes the file name of the Tcl script to
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* run at startup.
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*
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*----------------------------------------------------------------------
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*/
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void TclSetStartupScriptFileName(fileName)
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char *fileName;
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{
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tclStartupScriptFileName = fileName;
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}
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/*
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*----------------------------------------------------------------------
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*
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* TclGetStartupScriptFileName --
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*
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* Gets the startup script file name, used to override the
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* command line processing.
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*
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* Results:
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* The startup script file name, NULL if none has been set.
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*
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* Side effects:
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* None.
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*
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*----------------------------------------------------------------------
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*/
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char *TclGetStartupScriptFileName()
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{
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return tclStartupScriptFileName;
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}
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/*
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*----------------------------------------------------------------------
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*
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* Tcl_Main --
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*
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* Main program for tclsh and most other Tcl-based applications.
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*
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* Results:
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* None. This procedure never returns (it exits the process when
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* it's done.
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*
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* Side effects:
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* This procedure initializes the Tcl world and then starts
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* interpreting commands; almost anything could happen, depending
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* on the script being interpreted.
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*
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*----------------------------------------------------------------------
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*/
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void
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Tcl_Main(argc, argv, appInitProc)
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int argc; /* Number of arguments. */
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char **argv; /* Array of argument strings. */
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Tcl_AppInitProc *appInitProc;
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/* Application-specific initialization
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* procedure to call after most
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* initialization but before starting to
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* execute commands. */
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{
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Tcl_Obj *resultPtr;
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Tcl_Obj *commandPtr = NULL;
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char buffer[1000], *args;
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int code, gotPartial, tty, length;
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int exitCode = 0;
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Tcl_Channel inChannel, outChannel, errChannel;
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Tcl_Interp *interp;
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Tcl_DString argString;
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Tcl_FindExecutable(argv[0]);
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interp = Tcl_CreateInterp();
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#ifdef TCL_MEM_DEBUG
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Tcl_InitMemory(interp);
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#endif
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/*
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* Make command-line arguments available in the Tcl variables "argc"
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* and "argv". If the first argument doesn't start with a "-" then
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* strip it off and use it as the name of a script file to process.
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*/
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if (tclStartupScriptFileName == NULL) {
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if ((argc > 1) && (argv[1][0] != '-')) {
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tclStartupScriptFileName = argv[1];
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argc--;
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argv++;
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}
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}
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args = Tcl_Merge(argc-1, argv+1);
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Tcl_ExternalToUtfDString(NULL, args, -1, &argString);
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Tcl_SetVar(interp, "argv", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY);
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Tcl_DStringFree(&argString);
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ckfree(args);
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if (tclStartupScriptFileName == NULL) {
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Tcl_ExternalToUtfDString(NULL, argv[0], -1, &argString);
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} else {
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tclStartupScriptFileName = Tcl_ExternalToUtfDString(NULL,
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tclStartupScriptFileName, -1, &argString);
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}
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TclFormatInt(buffer, argc-1);
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Tcl_SetVar(interp, "argc", buffer, TCL_GLOBAL_ONLY);
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Tcl_SetVar(interp, "argv0", Tcl_DStringValue(&argString), TCL_GLOBAL_ONLY);
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/*
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* Set the "tcl_interactive" variable.
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*/
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tty = isatty(0);
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Tcl_SetVar(interp, "tcl_interactive",
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((tclStartupScriptFileName == NULL) && tty) ? "1" : "0",
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TCL_GLOBAL_ONLY);
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/*
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* Invoke application-specific initialization.
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*/
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/* Register any extensions that should be registered for the
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** executable currently being built.
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*/
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ExtninitInit(interp);
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/* Set a Tcl variable to indicate the particular product
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** we are building. This is used in the startup message script
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** to announce product version, and may be used other
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** places, as well.
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*/
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Tcl_SetVar(interp,
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BUILD_CONFIG_PRODUCT_NAME_VARIABLE,
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BUILD_CONFIG_STATIC_TCLSH_ALIAS,
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TCL_GLOBAL_ONLY);
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/* Set Tcl variable to indicate the relese version of the
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** product we are building. This is used in the startup message script
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** to announce product version, and may be used other
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** places, as well.
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*/
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Tcl_SetVar(interp,
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BUILD_CONFIG_PRODUCT_VERSION_VARIABLE,
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BUILD_CONFIG_RELEASE_VERSION,
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TCL_GLOBAL_ONLY);
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/* Output the introductory message to the console.
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** The script called is generic and applies to both
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** IjuScripter and IjuConsole.
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*/
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Tcl_GlobalEval(interp, BUILD_CONFIG_StartupMessageScript);
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/*
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* If a script file was specified then just source that file
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* and quit.
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*/
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if (tclStartupScriptFileName != NULL) {
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code = Tcl_EvalFile(interp, tclStartupScriptFileName);
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if (code != TCL_OK) {
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errChannel = Tcl_GetStdChannel(TCL_STDERR);
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if (errChannel) {
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/*
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* The following statement guarantees that the errorInfo
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* variable is set properly.
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*/
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Tcl_AddErrorInfo(interp, "");
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Tcl_WriteObj(errChannel, Tcl_GetVar2Ex(interp, "errorInfo",
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NULL, TCL_GLOBAL_ONLY));
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Tcl_WriteChars(errChannel, "\n", 1);
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}
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exitCode = 1;
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}
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goto done;
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}
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Tcl_DStringFree(&argString);
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/*
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* We're running interactively. Source a user-specific startup
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* file if the application specified one and if the file exists.
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*/
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Tcl_SourceRCFile(interp);
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/*
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* Process commands from stdin until there's an end-of-file. Note
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* that we need to fetch the standard channels again after every
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* eval, since they may have been changed.
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*/
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commandPtr = Tcl_NewObj();
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Tcl_IncrRefCount(commandPtr);
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inChannel = Tcl_GetStdChannel(TCL_STDIN);
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outChannel = Tcl_GetStdChannel(TCL_STDOUT);
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gotPartial = 0;
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while (1) {
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if (tty) {
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Tcl_Obj *promptCmdPtr;
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promptCmdPtr = Tcl_GetVar2Ex(interp,
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(gotPartial ? "tcl_prompt2" : "tcl_prompt1"),
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NULL, TCL_GLOBAL_ONLY);
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if (promptCmdPtr == NULL) {
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defaultPrompt:
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if (!gotPartial && outChannel) {
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Tcl_WriteChars(outChannel, "% ", 2);
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}
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} else {
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code = Tcl_EvalObjEx(interp, promptCmdPtr, 0);
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inChannel = Tcl_GetStdChannel(TCL_STDIN);
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outChannel = Tcl_GetStdChannel(TCL_STDOUT);
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errChannel = Tcl_GetStdChannel(TCL_STDERR);
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if (code != TCL_OK) {
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if (errChannel) {
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Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp));
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Tcl_WriteChars(errChannel, "\n", 1);
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}
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Tcl_AddErrorInfo(interp,
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"\n (script that generates prompt)");
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292 |
goto defaultPrompt;
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}
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}
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if (outChannel) {
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296 |
Tcl_Flush(outChannel);
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297 |
}
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}
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299 |
if (!inChannel) {
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goto done;
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}
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302 |
length = Tcl_GetsObj(inChannel, commandPtr);
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303 |
if (length < 0) {
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goto done;
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}
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306 |
if ((length == 0) && Tcl_Eof(inChannel) && (!gotPartial)) {
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307 |
goto done;
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308 |
}
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309 |
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310 |
/*
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311 |
* Add the newline removed by Tcl_GetsObj back to the string.
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312 |
*/
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313 |
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314 |
Tcl_AppendToObj(commandPtr, "\n", 1);
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315 |
if (!TclObjCommandComplete(commandPtr)) {
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316 |
gotPartial = 1;
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317 |
continue;
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318 |
}
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319 |
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320 |
gotPartial = 0;
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321 |
code = Tcl_RecordAndEvalObj(interp, commandPtr, 0);
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322 |
inChannel = Tcl_GetStdChannel(TCL_STDIN);
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323 |
outChannel = Tcl_GetStdChannel(TCL_STDOUT);
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324 |
errChannel = Tcl_GetStdChannel(TCL_STDERR);
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325 |
Tcl_DecrRefCount(commandPtr);
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326 |
commandPtr = Tcl_NewObj();
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327 |
Tcl_IncrRefCount(commandPtr);
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328 |
if (code != TCL_OK) {
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329 |
if (errChannel) {
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330 |
Tcl_WriteObj(errChannel, Tcl_GetObjResult(interp));
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331 |
Tcl_WriteChars(errChannel, "\n", 1);
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332 |
}
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333 |
} else if (tty) {
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334 |
resultPtr = Tcl_GetObjResult(interp);
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335 |
Tcl_GetStringFromObj(resultPtr, &length);
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336 |
if ((length > 0) && outChannel) {
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337 |
Tcl_WriteObj(outChannel, resultPtr);
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338 |
Tcl_WriteChars(outChannel, "\n", 1);
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339 |
}
|
340 |
}
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341 |
#ifdef TCL_MEM_DEBUG
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342 |
if (tclMemDumpFileName != NULL) {
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343 |
Tcl_DecrRefCount(commandPtr);
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344 |
Tcl_DeleteInterp(interp);
|
345 |
Tcl_Exit(0);
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346 |
}
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347 |
#endif
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348 |
}
|
349 |
|
350 |
/*
|
351 |
* Rather than calling exit, invoke the "exit" command so that
|
352 |
* users can replace "exit" with some other command to do additional
|
353 |
* cleanup on exit. The Tcl_Eval call should never return.
|
354 |
*/
|
355 |
|
356 |
done:
|
357 |
if (commandPtr != NULL) {
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358 |
Tcl_DecrRefCount(commandPtr);
|
359 |
}
|
360 |
sprintf(buffer, "exit %d", exitCode);
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361 |
Tcl_Eval(interp, buffer);
|
362 |
}
|
363 |
|
364 |
|
365 |
const char *TclMainCversion(void)
|
366 |
{
|
367 |
return ("$Header$");
|
368 |
}
|
369 |
|
370 |
|
371 |
const char *TclMainHversion(void)
|
372 |
{
|
373 |
return (TCLMAIN_H_VERSION);
|
374 |
}
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375 |
|
376 |
/* End of tclmain.c */
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