PATCHES TO DISABLE ACCESS TO SYSTEM FILES USING 'Y' FLAG


    Why 'y'?......Well 'y' not......and it was free.

    ey	-   enables access to system files
    dy	-   disables access to system files

    particularly useful if, as I have on my bios,
user level 0 system files are PUBLIC to ALL user levels.
    Dramatically reduces cluttering on a large disk by not
(unless you wish to) allowing you to see system files.
    By default system files do NOT exist for YAM.




*** INTO YAM.H

FLAG Sysfil;		/* does YAM see system files? ('y' flag)  */



*** INTO YAM1.C
*** PROC SETVAL()

		case 'y':
			Sysfil=value;
			break;



*** INTO YAM1.C
*** PROC INIT()

	    ......=Sysfil=FALSE;	add to existing ones.



*** INTO YAM7.C
*** PROC E1XPAND()

#ifdef RESTRICTED
		/* check for $SYS or tag bit on 2nd byte of filename (TAG2) */
		if((pfcb->fname[1]&0200) ||(pfcb->ftype[1]&0200))
			goto tryanother;
#else
		/* check for $SYS with Sysfil flag */
		if((pfcb->ftype[1]&0200) && !Sysfil)
			goto tryanother;
#endif


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