/* bootck.rexx Checks floppies for viruses and saves a irregular block */
no_boot = 'No bootblock installed'
real_boot = 'ARP thinks OK bootblock' /* this is arp's msg on OK bootblock */
/* if you use the CBM install program you must change the above string
   to reflect the CBM message
   You will also have to change the name of the disk/dir you want your
   non-standard boot blocks saved to
*/
YES   = 1
NO    = 0
STARTUP_SEQ = NO
SAVE        = 0
BOOT        = 1
NOBOOT      = 2
WriteProtect = TRUE              /* I disk write protect status */

arg vol                          /* gotta enter a volume name */
vol = upper(vol)

if length(vol) < 4 then do
    say "  You GOTTA Enter A Disk to check !!"
    exit
    end

select
    when compare(vol,'DF0:') = 0 then call fixit
    when compare(vol,'DF1:') = 0 then call fixit
    /* if you have df2: and df3: un - comment the below */
    /* when compare(vol,'DF2:') = 0 then call fixit */
    /* when compare(vol,'DF3:') = 0 then call fixit */
    otherwise say 'Drive Name Entry Error'
    end
exit


                /* CHECK FOR NON STANDARD BOOT BLOCK */
""'install 'vol 'check | execio  for 1 var boot_ck'

                /* CHECK FOR EXISTENCE OF STARTUP-SEQUENCE */
if exists(vol's/startup-sequence') then STARTUP_SEQ = YES

/* * * * * * * * * * STARTUP-SEQUENCE NOT FOUND ON DISK * * * * * * * * * */
if STARTUP_SEQ == NO then do
    if compare(boot_ck,no_boot) == 0 then do             /* no boot block */
        say 'no startup-sequence,no boot block'
        exit
        end

    if compare(boot_ck,real_boot) ~= 0 then do       /* boot non standard */
        say 'there is NO startup-sequence BUT'
        say 'There is a Non-Standard Boot Block'
        call yes_no 'DE-Install 'vol '?'
        if result == YES then call install_disk NOBOOT  /* DE-INSTALL   ? */
        else say "Okay but it might Be A Virus !!"
        exit
        end

    else if compare(boot_ck,real_boot) == 0 then do
        say 'there is NO startup-sequence BUT'
        say 'there is a VALID Boot block'               /* DE-INSTALL   ? */
        call yes_no 'De-Install 'vol '?'
        if result == YES then call install_disk NOBOOT
        exit
        end
    end

/* * * * * * * * * *  STARTUP-SEQUENCE LOCATED ON DISK * * * * * * * * * */
if STARTUP_SEQ == YES then do
    if compare(boot_ck,no_boot) == 0 then do            /* no boot block */
        say 'there is a startup-sequence on this disk'
        say 'but No boot block is installed'
        call yes_no 'Install Boot Block on 'vol '?'
        if result = YES then call install_disk BOOT
        end

    else if compare(boot_ck,real_boot) ~= 0 then do /* boot non standard */
        say 'there is a startup-sequence BUT'
        say 'Boot Block is non-standard '
        call yes_no 'Install standard Boot Block on 'vol '?'
        if result = YES then call install_disk SAVE    /* save non std ? */
        else say "Ok but it might be a VIRUS .."
        end

    end                                                 /* end seq = yes */


install_disk:
arg bt

/* check for a write protected disk */
""'info 'vol' | execio from 4 for 1 var diskinfo'    /* get info on disk */
if compare(word(diskinfo,7),'Read') == 0 then do
    say 'Disk is write protected !!'
    exit
    end
                /* DE_INSTALL DISK */
if bt == NOBOOT = 1 then do forever
    ""'install 'vol 'noboot'
    ""'install 'vol 'check | execio  for 1 var boot_ck' /* re-check the disk */
    if compare(boot_ck,no_boot) == 0 then do
        say "NOW UN-BOOTABLE"
        return
        end
     else do
        call yes_no "CAN'T UN-INSTALL THIS DISK !!..Retry ?"
        if result = NO then return
        end
    end

if bt == SAVE then do                       /* save non-std */
    call gdname vol
    x = '"' || getclip('DNAME') || '"'
    say 'saving bootblock to dh1:new/'diskname
    ""'bootback 'vol' dh1:new/'diskname
    ""'filenote dh1:new/'diskname 'bootblock'
    end

                    /* INSTALL GOOD BOOT BLOCK */
do forever
    ""'install 'vol                                     /* install disk */
    ""'install 'vol 'check | execio  for 1 var boot_ck'
    if compare(boot_ck,real_boot) == 0 then do
        say "Boot Block is now Correct "
        return
        end

    else do         /* could not correct bad boot block */
        call yes_no "Error Installing this disk.. RETRY ?"
        if result = NO then return
        end
    end