Mac Easy 2010 May/Mac Life Ubuntu.iso/casper/filesystem.squashfs/var/lib/dpkg/info/alsa-base.postinst

Text File | 2009-04-08 | 4.4 KB | 165 lines

#!/bin/sh

set -e

MYNAME="$0"

# $* message
warn() { echo "${MYNAME}: Warning: $*" >&2 ; }

# $* message
report_error() { echo "${MYNAME}: Error: $*" >&2 ; }

# Move a conffile without triggering a dpkg question
mv_conffile() {
    OLDCONFFILE="$1"
    NEWCONFFILE="$2"

    if [ -e "$OLDCONFFILE" ]; then
        echo "Preserving user changes to $NEWCONFFILE"
        mv -f "$NEWCONFFILE" "$NEWCONFFILE".dpkg-new
        mv -f "$OLDCONFFILE" "$NEWCONFFILE"
    elif [ -e "$OLDCONFFILE".dpkg-bak ]; then
        rm -f "$OLDCONFFILE".dpkg-bak
    fi
}

devfs_is_active()
{
    test -e /dev/.devfsd
}

kernel_is_2_6_or_above()
{
    case "$(uname -r)" in
        1.*|2.[012345]*) return 1 ;;
        *) return 0 ;;
    esac
}

udev_is_active()
{
    test -e /dev/.udev.tdb || test -d /dev/.udevdb || return 1
    kernel_is_2_6_or_above || return 1
    return 0
}

case "$1" in
configure|reconfigure)
    if dpkg --compare-versions "$2" lt "1.0.10-4ubuntu2"; then
        mv_conffile /etc/modprobe.d/alsa-base-blacklist \
            /etc/modprobe.d/blacklist-modem.conf

        rmdir /etc/alsa/modprobe-post-install.d 2>/dev/null || true

        rm -f /etc/discover.d/alsa-base
        rmdir /etc/discover.d 2>/dev/null || true

        rm -f /etc/hotplug/blacklist.d/alsa-base
        rmdir /etc/hotplug/blacklist.d 2>/dev/null || true

        rm -f /etc/modutils/alsa-base
        rmdir /etc/modutils 2>/dev/null || true

        rm -f /etc/init.d/alsa
    fi
    if dpkg --compare-versions "$2" lt "1.0.18.dfsg-1ubuntu5"; then
        mv_conffile /etc/modprobe.d/alsa-base \
                /etc/modprobe.d/alsa-base.conf
        mv_conffile /etc/modprobe.d/blacklist-modem \
                /etc/modprobe.d/blacklist-modem.conf
    fi

    # Remove old obsolete configuration files
    # (Keep this until etch)
    if [ -d /etc/sound ]; then
        rmdir /etc/sound 2> /dev/null || :
    fi
    rm -f \
        /etc/apm/event.d/alsa \
        /etc/apm/event.d/alsa.dpkg-old \
        /etc/default/alsa.debconf-backup \
        /etc/devfs/conf.d/alsa \
        /etc/discover.conf.d/10alsa \
        /etc/discover.conf.d/10alsa.dpkg-old \
        /etc/discover.conf.d/10linux-sound-base \
        /etc/discover.d/alsa \
        /etc/discover.d/alsa-base \
        /etc/discover.d/linux-sound-base_noOSS \
        /etc/discover.d/linux-sound-base_noALSA \
        /etc/alsa/alsa-base.conf \
        /etc/alsa/modutils/0.5 \
        /etc/alsa/modutils/0.9 \
        /etc/alsa/modutils/1.0 \
        /etc/alsa/modutils/0.5.debconf-backup \
        /etc/alsa/modutils/0.9.debconf-backup \
        /etc/alsa/modutils/1.0.debconf-backup \
        /etc/alsa/modprobe-post-install.d/alsa-base \
        /etc/alsa/modprobe-post-install.d/alsa-base.dpkg-old \
        /etc/modutils/alsa \
        /etc/modutils/alsa-path \
        /etc/modprobe.d/sound    \
        /etc/modutils/alsa-base \
        /etc/modutils/alsa-base-blacklist \
        /etc/modutils/linux-sound-base_noOSS \
        /etc/modutils/linux-sound-base_noALSA \
        /etc/modprobe.d/alsa
    # Delete hotplug stuff since it isn't used anymore.
    rm -f \
        /etc/hotplug/blacklist.d/alsa-base.dpkg-old \
        /etc/hotplug/blacklist.d/alsa-base \
        /etc/hotplug/blacklist.d/linux-sound-base_noOSS \
        /etc/hotplug/blacklist.d/linux-sound-base_noALSA
    # Decide which conf file to read
    conf_file=""
    if [ -f /etc/default/alsa ] ; then
        conf_file=/etc/default/alsa
    elif [ -f /usr/share/alsa-base/alsa.default ] ; then
        conf_file=/usr/share/alsa-base/alsa.default
    else
        report_error "No configuration file found"
        exit 1
    fi
    # Read variables from conf file
    force_unload_modules_before_suspend="$(
        . "$conf_file" >/dev/null 2>&1
        echo "$force_unload_modules_before_suspend"
    )"
    # Write new conf file
    cat /usr/share/alsa-base/alsa.default | sed \
        -e "s/force_unload_modules_before_suspend=.*/force_unload_modules_before_suspend=\"${force_unload_modules_before_suspend}\"/" \
        > /etc/default/alsa
    # Set up apm symlinks
    [ -f /etc/apm/scripts.d/alsa ] || warn "/etc/apm/scripts.d/alsa is absent"
    # $1: file to check
    already_linked_to_alsa()
    {
        [ "$1" ] || return 1
        [ -L "$1" ] || return 1
        [ "$(basename "$(readlink "$1")")" = alsa ] || return 1
        return 0
    }
    ALREADY_LINKED=no
    for F in /etc/apm/suspend.d/??alsa ; do
        already_linked_to_alsa "$F" && ALREADY_LINKED=yes && break
    done
    [ "$ALREADY_LINKED" = yes ] || ln -sf ../scripts.d/alsa /etc/apm/suspend.d/80alsa
    ALREADY_LINKED=no
    for F in /etc/apm/resume.d/??alsa ; do
        already_linked_to_alsa "$F" && ALREADY_LINKED=yes && break
    done
    [ "$ALREADY_LINKED" = yes ] || ln -sf ../scripts.d/alsa /etc/apm/resume.d/20alsa
    ;;
abort-upgrade|abort-remove|abort-deconfigure)
    # We don't have to do anything because we didn't do anything in prerm
    exit 0
    ;;
*)
    echo "postinst called with unknown argument \`$1'" >&2
    exit 1
    ;;
esac