plan9fox/rc/bin/inst/mountdist
2011-04-23 20:37:27 +00:00

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#!/bin/rc
# prereq: mountfs configdist
# desc: locate and mount the distribution
fn domount{
if(! test -e $mountmedia(2))
logprog $srvmedia
unmount /n/distmedia >[2]/dev/null
logprog $mountmedia
}
fn exitifdone{
if(test -f /n/dist/LICENSE)
exit
}
fn havedist {
test -f $1/LICENSE
}
switch($1){
case checkready
if(! ~ $distisfrom local && ! ~ $download done){
mountdist=notdone
export mountdist
}
if(! ~ $#mountmedia 0 1){
if(domount){
mountdist=done
export mountdist
if(mountdist checkdone)
exit
}
srvmedia=()
mountmedia=()
mountdist=ready
export srvmedia mountmedia mountdist
}
case go
fat=()
ext2=()
x9660=()
echo Please wait... Scanning storage devices...
parts=`{ls /dev/sd[A-Z][0-9]*/* >[2]/dev/null | grep -v '/(plan9.*|ctl|log|raw)$'}
for (i in $parts) {
echo -n ' '^$i
n=`{echo $i | sed 's;/;_;g'}
if(! test -f /tmp/localpart.$n)
dd -if $i -bs 2048 -count 32 -of /tmp/localpart.$n >[2]/dev/null
if(isfat /tmp/localpart.$n)
fat=($fat $i)
if(isext2 /tmp/localpart.$n)
ext2=($ext2 $i)
if(is9660 /tmp/localpart.$n)
x9660=($x9660 $i)
echo
}
echo
echo The following storage media were detected.
echo Choose the one containing the distribution.
echo
for(i in $parts){
switch($i){
case $fat
echo ' '^$i^' (microsoft fat)'
case $ext2
echo ' '^$i^' (linux ext2)'
case $x9660
echo ' '^$i^' (iso9660 cdrom)'
}
}
echo
mountstatus=x
while(! ~ $mountstatus ''){
prompt -w '' 'Distribution disk' $fat $x9660
disk=$rd
srvmedia=()
mountmedia=()
switch($disk){
case $fs
mountmedia=(bind /n/newfs /n/distmedia)
case $fat
srvmedia=(dossrv)
mountmedia=(mount /srv/dos /n/distmedia $disk)
case $ext2
srvmedia=(ext2srv -r)
mountmedia=(mount /srv/ext2 /n/distmedia $disk)
case $x9660
srvmedia=(9660srv)
mountmedia=(mount /srv/9660 /n/distmedia $disk)
case *
echo Unknown disk type '(cannot happen)'
exit oops
}
export srvmedia mountmedia
domount
mountstatus=$status
}
first=yes
dir=/
while(~ $first yes || ! havedist /n/distmedia/$dir){
if(~ $first yes){
echo
echo Which directory contains the distribution?
echo 'Any of the following will suffice (in order of preference):'
echo ' - the root directory of the cd image'
echo
first=no
}
prompt -d $dir 'Location of archives'
dir=$rd
if(~ $#dir 0)
dir=/
if(! ~ $#dir 1)
dir=$"dir
if(! havedist /n/distmedia/$dir)
echo 'No distribution found in '^`{cleanname /$dir}
}
distmediadir=$dir
export distmediadir
case checkdone
if(! ~ $#distmediadir 1){
mountdist=notdone
export mountdist
exit notdone
}
if(! havedist /n/distmedia/$distmediadir && ! havedist /n/newfs/dist){
mountdist=notdone
export mountdist
exit notdone
}
exitifdone
if(havedist /n/distmedia/$distmediadir){
bind /n/distmedia/$distmediadir /n/dist
exitifdone
mountdist=notdone
export mountdist
exit notdone
}
mountdist=notdone
export mountdist
exit notdone
}