*
 * Copyright (c) 1991-1994 The Regents of the University of California.
 * Copyright (c) 1994-1997 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: tclIOUtil.c,v 1.26 2001/11/23 01:27:00 das Exp $
 */

#include "tclInt.h"
#include "tclPort.h"
#ifdef MAC_TCL
#include "tclMacInt.h"
#endif

 * Results:
 *	A standard Tcl result, which is either the result of executing
 *	the file or an error indicating why the file couldn't be read.
 *
 * Side effects:
 *	Depends on the commands in the file.  During the evaluation
 *	of the contents of the file, iPtr->scriptFile is made to
 *	point to fileName (the old value is cached and replaced when
 *	this function returns).
 *
 *----------------------------------------------------------------------
 */

int
Tcl_FSEvalFile(interp, fileName)
    Tcl_Interp *interp;		/* Interpreter in which to process file. */
    Tcl_Obj *fileName;		/* Name of file to process.  Tilde-substitution
				 * will be performed on this name. */
{
    int result, length;
    struct stat statBuf;
    Tcl_Obj *oldScriptFile;
    Interp *iPtr;
    char *string;
    Tcl_Channel chan;
    Tcl_Obj *objPtr;

    if (Tcl_FSGetTranslatedPath(interp, fileName) == NULL) {
	return TCL_ERROR;
    }

    result = TCL_ERROR;
    objPtr = Tcl_NewObj();

    if (Tcl_FSStat(fileName, &statBuf) == -1) {
        Tcl_SetErrno(errno);
	Tcl_AppendResult(interp, "couldn't read file \"", 
		Tcl_GetString(fileName),
		"\": ", Tcl_PosixError(interp), (char *) NULL);
	goto end;
    }
    chan = Tcl_FSOpenFileChannel(interp, fileName, "r", 0644);
    if (chan == (Tcl_Channel) NULL) {
        Tcl_ResetResult(interp);
	Tcl_AppendResult(interp, "couldn't read file \"", 
		Tcl_GetString(fileName),
		"\": ", Tcl_PosixError(interp), (char *) NULL);
	goto end;
    }
    /*
     * The eofchar is \32 (^Z).  This is the usual on Windows, but we
     * effect this cross-platform to allow for scripted documents.
     * [Bug: 2040]
     */
    Tcl_SetChannelOption(interp, chan, "-eofchar", "\32");
    if (Tcl_ReadChars(chan, objPtr, -1, 0) < 0) {
        Tcl_Close(interp, chan);
	Tcl_AppendResult(interp, "couldn't read file \"", 
		Tcl_GetString(fileName),
		"\": ", Tcl_PosixError(interp), (char *) NULL);
	goto end;
    }
    if (Tcl_Close(interp, chan) != TCL_OK) {
        goto end;
    }

    iPtr = (Interp *) interp;
    oldScriptFile = iPtr->scriptFile;
    iPtr->scriptFile = fileName;
    Tcl_IncrRefCount(iPtr->scriptFile);
    string = Tcl_GetStringFromObj(objPtr, &length);
    result = Tcl_EvalEx(interp, string, length, 0);
    /* 
     * Now we have to be careful; the script may have changed the
     * iPtr->scriptFile value, so we must reset it without
     * assuming it still points to 'fileName'.
     */
    if (iPtr->scriptFile != NULL) {
	Tcl_DecrRefCount(iPtr->scriptFile);
    }
    iPtr->scriptFile = oldScriptFile;

    if (result == TCL_RETURN) {
	result = TclUpdateReturnInfo(iPtr);
    } else if (result == TCL_ERROR) {
	char msg[200 + TCL_INTEGER_SPACE];

	/*
	 * Record information telling where the error occurred.
	 */

	sprintf(msg, "\n    (file \"%.150s\" line %d)", Tcl_GetString(fileName),
		interp->errorLine);
	Tcl_AddErrorInfo(interp, msg);
    }

    end:
    Tcl_DecrRefCount(objPtr);
    return result;

 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

static int
NativeFileAttrsGet(interp, index, fileName, objPtrRef)
    Tcl_Interp *interp;		/* The interpreter for error reporting. */
    int index;			/* index of the attribute command. */
    Tcl_Obj *fileName;		/* filename we are operating on. */
    Tcl_Obj **objPtrRef;	/* for output. */
{
    return (*tclpFileAttrProcs[index].getProc)(interp, index, 
					       fileName, objPtrRef);
}

/*
 *----------------------------------------------------------------------
 *
 * NativeFileAttrsSet --
 *

 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

static int
NativeFileAttrsSet(interp, index, fileName, objPtr)
    Tcl_Interp *interp;		/* The interpreter for error reporting. */
    int index;			/* index of the attribute command. */
    Tcl_Obj *fileName;		/* filename we are operating on. */
    Tcl_Obj *objPtr;		/* set to this value. */
{
    return (*tclpFileAttrProcs[index].setProc)(interp, index,
					       fileName, objPtr);
}

/*
 *----------------------------------------------------------------------
 *
 * Tcl_FSFileAttrStrings --
 *