STRING(3D)                                             STRING(3D)


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 char-
       acters terminated by a null character).  The function str-
       fry 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 permis-
       sions 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 sur-
       prises.















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By Olli's man-to-html utility, Mon Feb 17 00:38:30 MET 1997.