Subversion Repositories planix.SVN

#!/bin/rc

dosdisk=`{ls /dev/sd??/dos >[2]/dev/null | sed 1q | sed 's!.*/(.*)/dos!\1!'}
if(~ $#dosdisk 0 || ! c: || ! test -f /n/c:/autoexec.bat || ! test -f /n/c:/config.sys) {
        echo 'Could not find autoexec.bat or config.sys on the first FAT disk.' >[1=2]
        exit
}

for (i in autoexec config msdos)
        if(test -f /n/c:/$i.p9) {
                echo 'A Plan 9 backup already exists; will not edit system files again.' >[1=2]
                exit
        }

for (i in autoexec.bat config.sys msdos.sys)
        if(! cp /n/c:/$i /n/c:/^`{echo $i | sed 's/\.(bat|sys)$/.p9/'}) {
                echo 'Could not back up '^$i^'; will not continue.' >[1=2]
                exit
        }

if(! test -d /n/c:/plan9 && ! mkdir /n/c:/plan9) {
        echo 'Could not create directory /n/c:/plan9.' >[1=2]
        exit
}

if(! cp /386/^(9load ld.com) /386/9pcdisk /n/c:/plan9) {
        echo 'Could not copy Plan 9 boot files into /n/c:/plan9.' >[1=2]
        exit
}

chmod +w /n/c:/autoexec.bat /n/c:/config.sys /n/c:/msdos.sys

if(grep -si 'Plan ?9' /n/c:/config.sys || grep -si 'Plan ?9' /n/c:/autoexec.bat) {
        echo 'Plan 9 entries already in config.sys or autoexec.bat.' >[1=2]
        echo 'Not changing them; refer to Plan 9 install documentation' >[1=2]
        echo 'to configure manually.' >[1=2]
        exit
}

if(! grep -si '\[menu\]' /n/c:/config.sys) {
        {
                echo 1
                echo i
                echo '[menu]
'
                echo 'menuitem=windows, Windows
'
                echo 'menudefault=windows
'
                echo '
'
                echo '[common]
'
                echo '
'
                echo '[windows]
'
                echo .
                echo w
                echo q
        } | ed /n/c:/config.sys >/dev/null >[2]/dev/null
}

{
        echo 1
        echo '/\[[Mm][Ee][Nn][Uu]\]'
        echo '?^[Mm][Ee][Nn][Uu][Ii][Tt][Ee][Mm]='
        echo a
        echo 'menuitem=plan9, Plan 9 from Bell Labs
'
        echo .
        echo '$'
        echo a
        echo '
'
        echo '[plan9]
'
        echo '
'
        echo .
        echo w
        echo q
} | ed /n/c:/config.sys >/dev/null >[2]/dev/null

{
        echo 1
        echo i
        echo '@echo off
'
        echo 'if %config%==plan9 goto plan9
'
        echo 'goto notplan9
'
        echo ':plan9
'
        echo 'plan9\ld '^$dosdisk^'!dos!plan9/9load
'
        echo ':notplan9
'
        echo .
        echo w
        echo q
} | ed /n/c:/autoexec.bat >/dev/null >[2]/dev/null

fn zeroopt {
        if(grep -s '^'^$1^'=1' /n/c:/msdos.sys) {
                {
                        echo '/^'^$1^'=1/s/=1/=0/'
                        echo w
                        echo q
                } | ed /n/c:/msdos.sys >/dev/null >[2]/dev/null
        }
        if not if (grep -s '^'^$1^'=0' /n/c:/msdos.sys)
                ;
        if not {
                {
                        echo 1
                        echo i
                        echo '[Options]
'
                        echo 'Logo=0
'
                        echo .
                        echo w
                        echo q
                } | ed /n/c:/msdos.sys >/dev/null >[2]/dev/null
        }
}

if(grep -si '^\[paths\]' /n/c:/msdos.sys){      # Windows 9x rather than DOS
        zeroopt Logo
}

exit