* generic code because otherwise every filesystem implementation of
     * Tcl_FSMatchInDirectory has to do it.
     */

    cwd = Tcl_FSGetCwd(NULL);
    if (cwd == NULL) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "glob couldn't determine the current working directory",
		    -1));
	}
	return TCL_ERROR;
    }

    fsPtr = Tcl_FSGetFileSystemForPath(cwd);
    if (fsPtr != NULL && fsPtr->matchInDirectoryProc != NULL) {
	TclNewObj(tmpResultPtr);

	    goto error;
	}
	return mode;

    error:
	*modeFlagsPtr = 0;
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "illegal access mode \"%s\"", modeString));
	    Tcl_SetErrorCode(interp, "TCL", "OPENMODE", "INVALID", (char *)NULL);
	}
	return -1;
    }

    /*
     * The access modes are specified as a list of POSIX modes like O_CREAT.

    for (i = 0; i < modeArgc; i++) {
	flag = modeArgv[i];
	c = flag[0];
	if ((c == 'R') && (strcmp(flag, "RDONLY") == 0)) {
	    if (gotRW) {
	    invRW:
		if (interp != NULL) {
		    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
				"invalid access mode \"%s\": modes RDONLY, "
				"RDWR, and WRONLY cannot be combined", flag));
		}
		goto invAccessMode;
	    }
	    mode = (mode & ~O_ACCMODE) | O_RDONLY;
	    gotRW = 1;
	} else if ((c == 'W') && (strcmp(flag, "WRONLY") == 0)) {
	    if (gotRW) {

	    }
	    mode = (mode & ~O_ACCMODE) | O_RDWR;
	    gotRW = 1;
	} else if ((c == 'A') && (strcmp(flag, "APPEND") == 0)) {
	    if (mode & O_APPEND) {
	    accessFlagRepeated:
		if (interp) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"access mode \"%s\" repeated", flag));
		}
	    goto invAccessMode;
	    }
	    mode |= O_APPEND;
	    *modeFlagsPtr |= 1;
	} else if ((c == 'C') && (strcmp(flag, "CREAT") == 0)) {
	    if (mode & O_CREAT) {
	    goto accessFlagRepeated;
	    }
	    mode |= O_CREAT;
	} else if ((c == 'E') && (strcmp(flag, "EXCL") == 0)) {
	    if (mode & O_EXCL) {
		goto accessFlagRepeated;
	    }
	    mode |= O_EXCL;
	} else if ((c == 'N') && (strcmp(flag, "NOCTTY") == 0)) {
#ifdef O_NOCTTY
	    if (mode & O_NOCTTY) {
		goto accessFlagRepeated;
	    }
	    mode |= O_NOCTTY;
#else
	    if (interp != NULL) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"access mode \"%s\" not supported by this system",
			flag));
	    }
	    goto invAccessMode;
#endif

	} else if ((c == 'N') && (strcmp(flag, "NONBLOCK") == 0)) {
#ifdef O_NONBLOCK
	    if (mode & O_NONBLOCK) {
		goto accessFlagRepeated;
	    }
	    mode |= O_NONBLOCK;
#else
	    if (interp != NULL) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"access mode \"%s\" not supported by this system",
			flag));
	    }
	    goto invAccessMode;
#endif
	} else if ((c == 'T') && (strcmp(flag, "TRUNC") == 0)) {
	    if (mode & O_TRUNC) {
		goto accessFlagRepeated;
	    }
	    mode |= O_TRUNC;
	} else if ((c == 'B') && (strcmp(flag, "BINARY") == 0)) {
	    if (*modeFlagsPtr & CHANNEL_RAW_MODE) {
		goto accessFlagRepeated;
	    }
	    *modeFlagsPtr |= CHANNEL_RAW_MODE;
	} else {
	    if (interp != NULL) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"invalid access mode \"%s\": must be APPEND, BINARY, "
			"CREAT, EXCL, NOCTTY, NONBLOCK, RDONLY, RDWR, "
			"TRUNC, or WRONLY", flag));
	    }
	    goto invAccessMode;
	}
    }

    Tcl_Free((void *)modeArgv);

    if (!gotRW) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "access mode must include either RDONLY, RDWR, or WRONLY",
		    -1));
	}
	return -1;
    }
    return mode;
}

/*

    if (Tcl_FSGetNormalizedPath(interp, pathPtr) == NULL) {
	return result;
    }

    if (Tcl_FSStat(pathPtr, &statBuf) == -1) {
	Tcl_SetErrno(errno);
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	return result;
    }
    chan = Tcl_FSOpenFileChannel(interp, pathPtr, "r", 0644);
    if (chan == NULL) {
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	return result;
    }

    /*
     * The eof character is \x1A (^Z). Tcl uses it on every platform to allow
     * for scripted documents. [Bug: 2040]
     */

    /*
     * Read first character of stream to check for utf-8 BOM
     */

    if (Tcl_ReadChars(chan, objPtr, 1, 0) == TCL_IO_FAILURE) {
	Tcl_CloseEx(interp, chan, 0);
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	goto end;
    }
    string = TclGetString(objPtr);

    /*
     * If first character is not a BOM, append the remaining characters.
     * Otherwise, replace them. [Bug 3466099]
     */

    if (Tcl_ReadChars(chan, objPtr, TCL_INDEX_NONE,
	    memcmp(string, "\xEF\xBB\xBF", 3)) == TCL_IO_FAILURE) {
	Tcl_CloseEx(interp, chan, 0);
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	goto end;
    }

    if (Tcl_CloseEx(interp, chan, 0) != TCL_OK) {
	goto end;
    }

    if (Tcl_FSGetNormalizedPath(interp, pathPtr) == NULL) {
	return TCL_ERROR;
    }

    if (Tcl_FSStat(pathPtr, &statBuf) == -1) {
	Tcl_SetErrno(errno);
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	return TCL_ERROR;
    }
    chan = Tcl_FSOpenFileChannel(interp, pathPtr, "r", 0644);
    if (chan == NULL) {
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	return TCL_ERROR;
    }
    TclPkgFileSeen(interp, TclGetString(pathPtr));

    /*
     * The eof character is \x1A (^Z). Tcl uses it on every platform to allow
     * for scripted documents. [Bug: 2040]

    /*
     * Read first character of stream to check for utf-8 BOM
     */

    if (Tcl_ReadChars(chan, objPtr, 1, 0) == TCL_IO_FAILURE) {
	Tcl_CloseEx(interp, chan, 0);
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	Tcl_DecrRefCount(objPtr);
	return TCL_ERROR;
    }
    string = TclGetString(objPtr);

    /*
     * If first character is not a BOM, append the remaining characters.
     * Otherwise, replace them. [Bug 3466099]
     */

    if (Tcl_ReadChars(chan, objPtr, TCL_INDEX_NONE,
	    memcmp(string, "\xEF\xBB\xBF", 3)) == TCL_IO_FAILURE) {
	Tcl_CloseEx(interp, chan, 0);
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't read file \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
	Tcl_DecrRefCount(objPtr);
	return TCL_ERROR;
    }

    if (Tcl_CloseEx(interp, chan, 0) != TCL_OK) {
	Tcl_DecrRefCount(objPtr);
	return TCL_ERROR;

	/*
	 * Seek and/or set binary mode as determined above.
	 */

	if ((modeFlags & 1) && Tcl_Seek(retVal, (Tcl_WideInt) 0, SEEK_END)
		< (Tcl_WideInt) 0) {
	    if (interp != NULL) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"could not seek to end of file while opening \"%s\": %s",
			TclGetString(pathPtr), Tcl_PosixError(interp)));
	    }
	    Tcl_CloseEx(NULL, retVal, 0);
	    return NULL;
	}
	if (modeFlags & CHANNEL_RAW_MODE) {
	    Tcl_SetChannelOption(interp, retVal, "-translation", "binary");
	}
	return retVal;
    }

    /*
     * File doesn't belong to any filesystem that can open it.
     */

    Tcl_SetErrno(ENOENT);
    if (interp != NULL) {
	Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		"couldn't open \"%s\": %s",
		TclGetString(pathPtr), Tcl_PosixError(interp)));
    }
    return NULL;
}

/*
 *----------------------------------------------------------------------
 *

		    fsRecPtr->fsPtr->freeInternalRepProc(retCd);
		}
		Tcl_DecrRefCount(retVal);
		retVal = NULL;
		Disclaim();
		goto cdDidNotChange;
	    } else if (interp != NULL) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"error getting working directory name: %s",
			Tcl_PosixError(interp)));
	    }
	}
	Disclaim();

	if (retVal != NULL) {
	    /*
	     * On some platforms the pathname of the current directory might

	     * New API.
	     */

	    TclFSGetCwdProc2 *proc2 = (TclFSGetCwdProc2 *) fsPtr->getCwdProc;

	    retCd = proc2(tsdPtr->cwdClientData);
	    if (retCd == NULL && interp != NULL) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"error getting working directory name: %s",
			Tcl_PosixError(interp)));
	    }

	    if (retCd == tsdPtr->cwdClientData) {
		goto cdDidNotChange;
	    }

	    /*

    /*
     * Make sure the file is accessible.
     */

    if (Tcl_FSAccess(pathPtr, R_OK) != 0) {
	if (interp) {
	    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
		    "couldn't load library \"%s\": %s",
		    TclGetString(pathPtr), Tcl_PosixError(interp)));
	}
	return TCL_ERROR;
    }

#ifdef TCL_LOAD_FROM_MEMORY
    /*
     * The platform supports loading a dynamic shared object from memory.

	 /*
	  * Try to delete the file we probably created and then exit.
	  */

	Tcl_FSDeleteFile(copyToPtr);
	Tcl_DecrRefCount(copyToPtr);
	if (interp) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "couldn't load from current filesystem", -1));
	}
	return TCL_ERROR;
    }

    if (TclCrossFilesystemCopy(interp, pathPtr, copyToPtr) != TCL_OK) {
	Tcl_FSDeleteFile(copyToPtr);
	Tcl_DecrRefCount(copyToPtr);

int
Tcl_FSUnloadFile(
    Tcl_Interp *interp,		/* The relevant interpreter. */
    Tcl_LoadHandle handle)	/* A handle for the object to unload. */
{
    if (handle->unloadFileProcPtr == NULL) {
	if (interp != NULL) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "cannot unload: filesystem does not support unloading",
		    -1));
	}
	return TCL_ERROR;
    }
    if (handle->unloadFileProcPtr != NULL) {
	handle->unloadFileProcPtr(handle);
    }
    return TCL_OK;

	Tcl_Size length;

	while ((*p != '\0') && (*p != separator)) {
	    p++;
	}
	length = p - elementStart;
	if (length > 0) {
	    Tcl_Obj *nextElt;
	    nextElt = Tcl_NewStringObj(elementStart, length);
	    Tcl_ListObjAppendElement(NULL, result, nextElt);
	}
	if (*p++ == '\0') {
	    break;
	}
    }