PC World 2000 February/PCWorld_2000-02_cd.bin/live/usr/lib/dpkg/methods/disk/setup

Text File | 1999-03-02 | 14.3 KB | 575 lines

#!/bin/sh

set -e
vardir="$1"
method=$2
option=$3

cd "$vardir/methods/disk"
tp=/var/run/ddm$$

iarch=`dpkg --print-installation-architecture`

xit=1
trap '
    rm -f $tp.?
    if [ -n "$umount" ]
    then
        umount "$umount" >/dev/null 2>&1
    fi
    exit $xit
' 0

if ls -d "$tp.?" >/dev/null 2>&1
then
    rm $tp.?
fi

yesno () {
    while true
    do
        echo -n "$2 [$1]  "
        read response
        if [ -z "$response" ]
        then
            response="$1"
        fi
        case "$response" in
        [Nn]*)    yesno=no ; return ;;
        [Yy]*)    yesno=yes ; return ;;
        esac
    done
}

getblockdev () {
    mountpoint="$vardir/methods/mnt"
    if [ -z "$defaultdevice" ]
    then
        defaultdevice="$newdefaultdevice"
    elif [ "$defaultdevice" != "$newdefaultdevice" ]
    then
        echo \
    "Last time you specified installation from $defaultdevice."
    fi
    promptstring="$1"
    while [ -z "$blockdevice" ]
    do
        echo -n "$promptstring [$defaultdevice]:  "
        read response
        if [ -z "$response" ]
        then
            response="$defaultdevice"
        fi
        if ! [ -b "$response" ]
        then
            echo "$response is not a block device."; continue
        fi
        tryblockdevice="$response"
        if [ $option = cdrom ]
        then
            fstype=iso9660
        elif [ $option = harddisk ]
        then
            blockbase="`echo \"$tryblockdevice\" | sed -e 's/[0-9]\{1,\}$//'`"
            set +e
            echo -e "p\nq\n" | fdisk "$blockbase" 2>/dev/null >$tp.f
            set -e
            proposeddevice="$tryblockdevice" perl -ne '
next unless /^ *Device +Boot +Begin +Start +End +Blocks +Id +System *$/i .. !/\S/;
next unless s:^/\S+:: && $& eq $ENV{"proposeddevice"};
next unless s/^ +(\* +)?\d+ +\d+ +\d+ +\d+\+? +//;
next unless m/^([0-9a-f]{1,2}) /i;
%types= ( "1","msdos", "4","msdos", "6","msdos", "7","hpfs", "80","minix",
          "81","minix", "83","ext2" );
print $types{$1}; exit(0);    ' <$tp.f >$tp.m
            defaultfstype="`cat $tp.m`"
            if [ -n "$defaultfstype" ]
            then
                cat <<END
The partition table for $blockbase claims that $tryblockdevice
contains filesystem type $defaultfstype.
END
                if ! grep "    $defaultfstype$" /proc/filesystems >/dev/null
                then
                    echo \
    "Your kernel does not appear to support that filesystem type."
                    defaultfstype=""
                fi
            fi
            echo -n "Supported filesystems: "
            sed -e 's/^.*    / /' /proc/filesystems | tr '\n' ' '
            echo -n "
Enter filesystem type (for $tryblockdevice) [$defaultfstype]:  "
            read fstype
            if [ -z "$fstype" ]
            then
                fstype="$defaultfstype"
            fi
        fi
        umount="$mountpoint"
        if mount -rt "$fstype" -o nosuid,nodev "$tryblockdevice" "$mountpoint"
        then
            echo
            blockdevice="$tryblockdevice"
        else
            umount=""
            echo \
    "Unable to mount $tryblockdevice on $mountpoint, type $fstype."
        fi
    done
}

outputparam () {
    echo "$2" | sed -e "s/'/'\\\\''/; s/^/$1='/; s/$/'/" >&3
}

intrkey="`stty -a | sed -n 's/.*intr = \([^;]*\);.*/\1/p'`"
echo "
If you make a mistake, use the interrupt key ($intrkey) to abort.
"

# State variables, `best first'
#  {main,ctb,nf,nus,lcl}_{packages,binary}
#   Empty before we've found them or if they're not available,
#   set to the relevant bit under mountpoint otherwise.
#  hierbase
#   A directory containing a Debian FTP site mirror tree for ONE distribution.
#    eg /pub/debian/dists/stable
#  mountpoint
#   The mountpoint for the filesystem containing the stuff
#   empty or unset if we don't know yet, or if we haven't mounted anything;
#   may also be empty if `directory' was set.
#  blockdevice
#   The actual block device to mount.
#  fstype
#   The filesystem type to use.
#  defaultdevice
#   The default block device to mount.

if [ -f shvar.$option ]
then
    . ./shvar.$option
    defaultdevice="$p_blockdev"
    defaultnfsserver="$p_nfsserver"
    defaultnfsrempath="$p_nfsrempath"
fi

if [ $option = cdrom ]
then
    mount >$tp.m
    sed -n 's/ ([^)]*)$//; s/^[^ ]* on //; s/ type iso9660$//p' <$tp.m >$tp.l
    ncdroms=`wc -l <$tp.l`
    if [ $ncdroms -gt 1 ]
    then
        response=""
        while [ -z "$response" ]
        do
            echo \
    'Several CD-ROMs (or other ISO9660 filesystems) are mounted:'
            egrep 'type iso9660 \([^)]*\)$' <$tp.m | nl
            echo -n \
    'Is it any of these ?  Type a number, or `n'\'' for none.  '
            read response
            response="`echo \"$response\" | sed -e 's/[     ]*$//'`"
            if expr "$response" : '[0-9][0-9]*$' >/dev/null && \
               [ $response -ge 1 -a $response -le $ncdroms ]
            then
                mountpoint="`sed -n $response'p' <$tp.l`"
                echo
            elif expr "$response" : '[Nn]' >/dev/null
            then
                mountpoint=""
            else
                response=""
            fi
        done
    elif [ $ncdroms = 1 ]
    then
        mountpoint="`cat $tp.l`"
        perl -ne 'print if s/ type iso9660 \([^)]*\)$// && s/ on .*$//;' \
            <$tp.m >$tp.d
        blockdevice="`cat $tp.d`"
        yesno yes \
    "I see a CD-ROM: $blockdevice, mounted on $mountpoint.  Is it the right one ?"
        if [ $yesno = no ]
        then
            echo 'Unmounting it ...'
            umount="$mountpoint"
            while true
            do
                echo -n \
    'Please insert the right disc, and hit return:  '
                read response
                if mount -rt iso9660 -o nosuid,nodev \
                    "$blockdevice" "$mountpoint"
                then
                    echo
                    break
                fi
            done
        fi
    fi
    if [ -z "$mountpoint" ]
    then
        if [ -b /dev/cdrom ]
        then
            echo \
    'I see that /dev/cdrom exists and is a block device.'
            newdefaultdevice=/dev/cdrom
        fi
        getblockdev 'Insert the CD-ROM and enter the block device name'
    fi
fi

if [ $option = nfs ]
then
    mountpoint="$vardir/methods/mnt"
    while [ -z "$nfsserver" ]
    do
        echo -n \
"What is the name of the NFS server ? [$defaultnfsserver]  "
        read response
        if [ -z "$response" -a -n "$defaultnfsserver" ]
        then
            response="$defaultnfsserver"
        fi
        if [ -z "$response" ]; then continue; fi
        if [ -x /usr/bin/rpcinfo ]
        then
            if rpcinfo -u "$response" mountd >/dev/null
            then
                nfsserver="$response"
            else
                echo "$response appears not to be an NFS server."
            fi
        elif [ -x /bin/ping ]
        then
            if ping -q -c 1 "$response" | grep -q ', 1 packets received'
            then
                nfsserver="$response"
            else
                echo "$response appears to be down or nonexistent."
            fi
        else
            echo \
"(I can't check that now because there is no /usr/bin/rpcinfo or /bin/ping.)"
            nfsserver="$response"
        fi
    done
    while [ -z "$nfsrempath" ]
    do
        echo -n "
What is the pathname on the NFS server of the filesystem with
the Debian files? [$defaultnfsrempath]  "
        read response
        if [ -z "$response" -a -n "$defaultnfsrempath" ]
        then
            response="$defaultnfsrempath"
        else
            response="`echo \"$response\" | sed -e 's:/$::; s:^/*:/:'`"
        fi
        umount="$mountpoint"
        if mount -rt nfs -o nosuid,nodev "$nfsserver:$response" "$mountpoint"
        then
            echo
            nfsrempath="$response"
        else
            umount=""
            echo \
"Unable to mount NFS filesystem $nfsserver:$response."
        fi
    done
    nfs="$nfsserver:$nfsrempath"
fi

if [ $option = harddisk ]
then
    set +e
    echo -e 'p\nq\n' | fdisk /dev/hda 2>/dev/null >$tp.f
    if [ $? != 0 ]
    then
        echo -e 'p\nq\n' | fdisk /dev/sda 2>/dev/null >$tp.f
    fi
    set -e
    perl -ne '
next unless /^ *Device +Boot +Begin +Start +End +Blocks +Id +System *$/i .. !/\S/;
next unless / [146] +DOS \d+-bit \S+$/;
next unless m:^/\S+:;
print $&;        ' <$tp.f >$tp.d
    newdefaultdevice="`cat $tp.d`"
    echo "
I need to know which disk partition contains the distribution files;
disk partitions are specified by the block device name in Linux."
    if [ -n "$newdefaultdevice" ]
    then
        echo \
"By the way, $newdefaultdevice looks like a DOS partition."
    fi
    getblockdev "Enter the partition's block device name"
fi

if [ -n "$mountpoint" ]
then
    # We must have $mountpoint
    if [ $option = cdrom ]
    then
        echo \
'All directory names should be entered relative to the root of the CD-ROM.
'
    elif [ $option = nfs ]
    then
        echo \
"All directory names should be entered relative to the root of the NFS
filesystem, ie relative to $nfsrempath on the server.
"
    else
        echo \
"All directory names should be entered relative to the root of the
$fstype filesystem on $blockdevice.
"
    fi
fi

while true
do
    if [ $option = cdrom ]
    then
        echo \
"I would like to know where on the CD-ROM the top level of the Debian
distribution is (eg. 'dists/stable') - this directory usually contains the
Packages-Master file.

If the CD-ROM is badly organised and doesn't have a straightforward copy of
the distribution you may answer \`none' and we'll go through the parts
I need individually."
    else
        echo \
"In order to make it easy for me to find the relevant files I'd ideally
like to install from a straightforward copy of the Debian distribution.
To use this I'll need to know where the top level of that copy of the
distribution is (eg. 'debian/dists/stable') - this directory usually
contains the Packages-Master file.

If you do not have a straightforward copy of the distribution available
just answer \`none' and we'll go through the parts I need individually."
    fi
    defhierbase=none
# maybe ask for debian/dists and then show and ask for available dists
# eg. {stable,frozen,unstable,bo,hamm,slink}
    if [ -n "$p_hierbase" ]
    then
        if [ -d "$mountpoint/$p_hierbase/main/binary-$iarch" ]
        then
            echo "
Last time you said \`$p_hierbase', and that looks plausible."
            defhierbase="$p_hierbase"
        else
            echo "
Last time you said \`$p_hierbase', but that doesn't look plausible,
since \`$p_hierbase/main/binary-$iarch' doesn't seem to exist."
        fi
    fi
    if [ none = "$defhierbase" ]
    then
        if [ -d "$mountpoint/debian/dists/stable/main/binary-$iarch" ]
        then
            echo "
\`/debian/dists/stable' exists and looks plausible, so that's the default."
            defhierbase=/debian/dists/stable
        elif [ -d "$mountpoint/dists/stable/main/binary-$iarch" ]
        then
            echo "
\`/dists/stable' exists and looks plausible, so that's the default."
            defhierbase=/dists/stable
        fi
    fi
    echo -n \
"Distribution top level ? [$defhierbase]  "
    read response
    if [ -z "$response" ]
    then
        response="$defhierbase"
    fi
    if [ none = "$response" ]
    then
        hierbase=""
        break
    elif [ -d "$mountpoint/$response/main/binary-$iarch" ]
    then
        hierbase="`echo \"$response\" | sed -e 's:/*$::; s:^/*:/:'`"
        break
    fi
    echo \
"$response/main/binary-$iarch does not exist.
"
done


case "$hierbase" in
/* )    ;;
'' )    ;;
* )    hierbase="/$hierbase" ;;
esac

check_binary () {
    # args: area-in-messages directory
    # eg:   main             "$hierbase/main/binary-$iarch"
    # checks wether $2 contains *.deb
    if ! [ -d "$mountpoint$2/" ]
    then
        echo "\`$2' does not exist."
        return
    fi

    if ! ( find "$mountpoint$2/" -follow -name '*.deb' -print \
            | head -1 ) 2>/dev/null  | grep . >/dev/null
    then
        echo "\`$2' does not contain any *.deb packages.  Hmmpf."
        return
    fi
    echo "Using \`$2' as $1 binary dir."
    this_binary="$2"
}

find_area () {
    # args: area-in-messages area-in-vars subdirectory-in-hier
    #       last-time-binary last-time-packages
    # eg:   main             main         main
    #       "$p_main_binary" "$p_main_packages"

    this_binary=''
    this_packages=''
    if [ -n "$hierbase" ]
    then
        check_binary $1 "$hierbase/$3/binary-$iarch"
    fi

    if [ $option = cdrom -a $2 = nf -a -z "$this_binary" ]
    then
        echo '
Note: most CD-ROM distributions of Debian do not include programs
available in the `non-free'\'' directory of the distribution site.
This is because these programs have copyrights that prevent
distribution for profit on a CD-ROM - ie they are not free software.
If you wish to install these programs you'\''ll have to get them from an
alternative source.'
    elif [ $2 = lcl -a -z "$this_binary" ]
    then
        echo '
Note: By default there is no `local'\'' directory. It is intended for
packages you made yourself.'
    fi
    while [ -z "$this_binary" ]
    do
        defaultbinary="$4"
        echo "
Which directory contains the *.deb packages from the $1 distribution
area (this directory is named \`$3/binary-$iarch' on the distribution site) ?
Say \`none' if this area is not available."
        if [ $2 != main -a -z "$defaultbinary" ]
        then
            defaultbinary=none
        fi
        echo -n \
"Enter _$1_ binary dir. [$4]
 ?  "
        read response
        if [ -z "$response" -a -n "$defaultbinary" ]
        then
            response="$defaultbinary"
        fi
        if [ none = "$response" ]
        then
            break
        fi
        case "$response" in
        '' | none)    continue        ;;
        esac
        check_binary $1 "`echo \"$response\" | sed -e 's:/$::; s:^/*:/:'`"
    done
    if [ -n "$this_binary" ]
    then
        for f in Packages.gz packages.gz Packages packages
        do
            if [ -f "$mountpoint/$this_binary/$f" ]
            then
                echo "Using \`$this_binary/$f' for $1."
                this_packages="$this_binary/$f"
                break
            fi
        done
        while [ -z "$this_packages" ]
        do
            echo -n "
I can't find the $1 \`Packages' file.  The information in the
\`Packages' file is important for package selection during new
installations, and is very useful for upgrades.

If you overlooked it when downloading you should do get it now and
return to this installation procedure when you have done so: you will
find one Packages file and one Packages.gz file -- either will do --
in the \`binary-$iarch' subdirectory of each area on the FTP sites and
CD-ROMs.  Alternatively (and this will be rather slow) I can scan the
packages in the distribution area - say \`scan' if you want me to do so.

You need a separate Packages file from each of the distribution areas
you wish to install.

Where is the _$1_ \`Packages' file (if none is available, say \`none')
[$5]
 ?  "
            read response
            if [ -z "$response" -a -n "$5" ]
            then
                response="$5"
            fi
            case "$response" in
            '')        continue            ;;
            none)        break                ;;
            scan)        this_packages=scan        ;;
            /*)        this_packages="$response"    ;;
            *)        this_packages="/$response"    ;;
            esac
        done
    fi
    eval $2'_binary="$this_binary"'
    eval $2'_packages="$this_packages"'
}

find_area main main main "$p_main_binary" "$p_main_packages"
find_area contrib ctb contrib "$p_ctb_binary" "$p_ctb_packages"
find_area non-free nf non-free "$p_nf_binary" "$p_nf_packages"
find_area non-US nus non-US "$p_nus_binary" "$p_nus_packages"
find_area local lcl local "$p_lcl_binary" "$p_lcl_packages"

echo -n '
Hit RETURN to continue.  '
read response

exec 3>shvar.$option.new

outputparam p_blockdev "$blockdevice"
outputparam p_fstype "$fstype"
outputparam p_mountpoint "$mountpoint"
outputparam p_nfsserver "$nfsserver"
outputparam p_nfsrempath "$nfsrempath"
outputparam p_nfs "$nfs"
outputparam p_hierbase "$hierbase"

outputparam p_main_packages "$main_packages"
outputparam p_main_binary "$main_binary"
outputparam p_ctb_packages "$ctb_packages"
outputparam p_ctb_binary "$ctb_binary"
outputparam p_nf_packages "$nf_packages"
outputparam p_nf_binary "$nf_binary"
outputparam p_nus_packages "$nus_packages"
outputparam p_nus_binary "$nus_binary"
outputparam p_lcl_packages "$lcl_packages"
outputparam p_lcl_binary "$lcl_binary"

mv shvar.$option.new shvar.$option

xit=0