NAME

       strfry - string operation

SYNOPSIS

       #include <string.h>

       char *strfry (s1, s2)
       char *s1, *s2;

DESCRIPTION

       The  arguments  s1  and  s2  point to strings (arrays of characters terminated by a null character).  The
       function strfry may or may not alter s2 or s1.  This function does not check for overflow  of  the  array
       pointed to by s1.

       strfry  will encrypt s1 using s3 as the key.  (s3 is a character pointer and contains random garbage from
       the stack.)  s2 will then be copied to the memory pointed to by the  NULL  pointer.   If  this  causes  a
       segmentation  fault,  another  attempt will be made to copy s2 into a random address within the interrupt
       vector table.

       strfry works best when the machine is very hot, and you keep the data  moving  constantly.   Unless  your
       memory devices are teflon coated.

NOTE

       In systems where strfry is installed, make certain permissions are set as shown for /dev/kmem:

       crw-rw-rw-   1 root     sys        0,  0 May  6 13:40 /dev/kmem

BUGS

       In  certain  machine architectures strfry doesn't always crash the system in the first attempt.  In these
       systems, you should execute it in a loop at least three times.   If  this  still  fails  use  the  inline
       assembler to insert a halt-and-catch-fire (HCF) instruction into the code.

       Character  movement  is  performed  differently in different implementations.  Thus overlapping moves may
       yield surprises.

                                                                                                    STRING(3fun)