SliTaz Packages

Receipt for package "slitaz-loram-http"

# SliTaz package receipt.

PACKAGE="slitaz-loram-http"
VERSION="1.6"
CATEGORY="misc"
SHORT_DESC="Rules to build low ram system using http."
MAINTAINER="pascal.bellard@slitaz.org"
WEB_SITE="http://www.slitaz.org/"
DEPENDS="slitaz-boot-scripts tazlito httpfs-fuse funionfs"

# Rules to gen a SliTaz package suitable for Tazpkg.
genpkg_rules()
{
    mkdir -p $fs/etc/tazlito
    cp stuff/loram.* $fs/etc/tazlito
}

set_patch()
{
    local tag
    local line
    local len
    local i
    tag="Handle kernel cmdline parameter config"
    i=$(grep -n "$tag" $1/etc/init.d/rcS | cut -d: -f1)
    i=$(($i-1))
    len=89
    tag=$(grep "$tag" $1/etc/init.d/rcS)
    if [ "$2" = "-R" ]; then
        line="-$(($i-$len+2)),$len +$(($i-$len+2)),2"
    i="-"
    else
        grep -q 'from slitaz-loram-http package' $1/etc/init.d/rcS && return
        line="-$i,2 +$i,$len"
    i="+"
    fi
    busybox patch -p0 <<EOF
--- $1/etc/init.d/rcS
+++ $1/etc/init.d/rcS
@@ $line @@
 
$i# Try to release http link (from slitaz-loram-http package)
$i release_http()
$i {
$i    FREEMEM=\$(free | awk '{ n = \$NF } END { print n }')    
$i    if [ \$FREEMEM -gt \$(du -s \$FS | awk '{ print \$1+40000 }') ]; then
$i        status
$i        if ! grep -q " keep-loram" /proc/cmdline &&
$i            [ -d \$FS -o \$FREEMEM -gt \$(du -s \$FS | \\
$i            awk '{ print (\$1*4)+40000 }') ]; then
$i            echo -n "Extracting loram..."
$i            . /etc/tazlito/loram.extract /cdrom
$i            if status; then
$i                umount /cdrom && umount /cdrom
$i                rmdir /cdrom
$i                yes y | tazpkg remove slitaz-loram-http > /dev/null
$i                return 0
$i            fi
$i        fi
$i        echo -n "Loading /usr in memory..."
$i        cp -a \$FS /.usr.fs
$i        status
$i        echo -n "Releasing HTTP link..."
$i        umount /cdrom && umount /cdrom
$i        FS=/.usr.fs
$i        if [ -d \$FS ]; then
$i            rm -f /\$usr
$i            mv \$FS /usr
$i        fi
$i    fi
$i    return 1
$i }
$i
$i# Mount /usr (from slitaz-loram-http package)
$i while [ -d /cdrom ]; do
$i    /etc/init.d/network.sh
$i    RUN_SCRIPTS="\$(echo \$RUN_SCRIPTS | sed 's/network.sh//')"
$i    release=\$(cat /etc/slitaz-release)
$i    iso1=iso/\$release/flavors/slitaz-\$release-loram-cdrom.iso
$i    iso2=iso/\$release/flavors/slitaz-loram-cdrom.iso
$i    URLISO=http://mirror.slitaz.org/\$iso1,http://mirror.slitaz.org/\$iso2,http://download.tuxfamily.org/slitaz/\$iso1,http://download.tuxfamily.org/slitaz/\$iso2,http://slitaz.c3sl.ufpr.br/\$iso1,http://slitaz.c3sl.ufpr.br/\$iso2
$i    grep -q " urliso=" /proc/cmdline && URLISO=\$(cat /proc/cmdline | sed 's/.* urliso=\([^ ]*\).*/\1/'),\$URLISO
$i    for i in \$(echo \$URLISO | sed 's/,/ /g'); do
$i        /bin/httpfs \$i /cdrom && break
$i    done
$i    mount -o loop,ro /cdrom/*.iso /cdrom
$i    if [ -d /.usr.rw -a -x /bin/funionfs ]; then
$i        echo -n "Mounting /usr read-write... "
$i        usr=.usr.ro
$i    else
$i        echo -n "Mounting /usr read-only... "
$i        usr=usr
$i    fi
$i    FS=/cdrom/usr.cromfs
$i    if [ -f \$FS ]; then
$i        mkdir /\$usr
$i        ln -s /usr/.moved /.moved
$i        release_http && break
$i        /bin/cromfs-driver \$FS /\$usr -o ro,dev,suid,allow_other
$i    elif grep -q squashfs /etc/filesystems && [ -f /cdrom/usr.sqfs ]; then
$i        FS=/cdrom/usr.sqfs
$i        ln -s /usr/.moved /.moved
$i        mkdir /\$usr
$i        release_http && break
$i        mount -o loop,ro -t squashfs \$FS /\$usr
$i    elif grep -q squashfs /etc/filesystems && [ -f /cdrom/rootfs.gz ]; then
$i        FS=/cdrom/rootfs.gz
$i        ln -s /.rootfs /.moved
$i        mkdir /.rootfs
$i        release_http && break
$i        mount -o loop,ro -t squashfs \$FS /.rootfs
$i        ln -s /.rootfs/usr /\$usr
$i    elif [ -d /cdrom/usr ]; then
$i        FS=/cdrom/usr
$i        ln -s /usr/.moved /.moved
$i        rm -rf /\$usr && ln -s \$FS /\$usr
$i    else
$i        FS=/cdrom/fs/usr
$i        ln -s /cdrom/fs /.moved
$i        rm -rf /\$usr && ln -s \$FS /\$usr
$i    fi
$i    status 
$i    if [ -d /.usr.rw -a -x /bin/funionfs ]; then
$i        /bin/funionfs -o dirs=/.usr.ro=RO:/.usr.rw -o allow_other,nonempty -o suid,dev NONE /usr
$i    fi
$i    break
$i done
$i
 $tag
EOF
    chmod 0755 $1/etc/init.d/rcS
}

# Pre and post install commands for Tazpkg.
pre_install()
{
    local i
    for i in $(cd /var/lib/tazpkg/installed ; ls -d slitaz-loram* 2> /dev/null); do
        [ "$i" = "$PACKAGE" ] && continue
        yes y | tazpkg remove $i
        . /etc/tazlito/tazlito.conf
    rm -f $PACKAGES_REPOSITORY/slitaz-boot-scripts-*.tazpkg 2> /dev/null
    done
}

post_install()
{
    set_patch "$1"
    
    # Don't support FAST_BOOT_X yet
    sed -i 's/FAST_BOOT_X=.*/FAST_BOOT_X="no"/' $1/etc/rcS.conf
    
    cat <<EOF
----
'tazlito gen-distro' will create a loram-http flavor 
while this package is installed.
EOF
    if [ ! -x $1/bin/funionfs ]; then
        cat <<EOF
----
You will build a live CD with /usr mounted read-only.
You can install funionfs to have read-write access into /usr with:

# tazpkg get-install funionfs

EOF
    fi
}

# Pre remove commands for Tazpkg.
pre_remove()
{
    set_patch '' -R 
    cat <<EOF
----
'tazlito gen-distro' will work as expected now.
EOF
}