Public SourceMage Discussion List

[nealbirch <nealbirch AT attbi.com>]

Eric Sandall wrote:
> > > Great job on the init.d spell though - much prefer it to the previous
> > > setup.  Am feeling a lot happier about the important init scripts now.
> >
> > Thanks! Still some work to do. I'm going to put the networking script
> > back in net-tools, so things will be a bit more consistant, but it will
> > still have the part that lets you update the network cards
> >
> > neal
>
>
> Why are we moving scripts back out of init.d and into other spells?  I can
> see why for some of them (samba, cups, etc.), but for others (networking,
> mount*, etc.) they should stay in init.d, yes?

The functions and mount scripts will stay in the init.d spell, I made a 
lib file up with a set of functions that does the run level stuff, which 
I have attached which allows the other scripts to stay where they 
belong. I will be returning the networking script to net-tools within a 
few days and adding a local and nfs mount.sh to init.d.

This is a copy of what I sent out before, see what you think:

<from previous mail>
actually I was talking with Jason about using the functions (for cups) 
and wrote up a little lib_runlevel file for that. I've attached it so 
you can check it out. I was pretty tired when I wrote it so we need to 
test it.

(I have since tested and corrected it, it's attached to this.)

The game plan change #33.5b is to have the appropriate spells install 
the scripts, with a very few exceptions. I'm going to be updating the 
net-tools spell and a few others to do this, unless someone beats me to 
it, using the lib_runlevel functions. This makes it more sensible and 
less dependent on running another spell which could break things so your 
box don't boot. You all may remember the fiasco with the mount.sh script 
disappearing, and a few others had their networking.sh script vanish. 
Bad juju. It was due to the way the init.d spell was originally written. 
The unforseen consequences were that it called the standard function 
spells use to reap what was previous installed before recasting; 
unfortunately, that may not have been what was installed next, ie, if 
you installed all three scripts, and ran it again, it would pull out all 
three scripts before installing whatever was selected. If you didn't 
select the same mount.sh script, you lost it and your box wouldn't boot. 
bad bad juju.

One of the exceptions will be the mount.sh, init.d will install a 
mount_local.sh and an mount_nfs.sh to take care of the issue of trying 
to mount a network fs if your network isn't running. Since e2fsprogs no 
longer installs mount.sh, this shouldn't cause problems with one spell 
reaping another spells scripts. which is why we are putting the scripts 
back in the spells. Make sense?

--
"You can fool some of the people all of the time
--and those are the ones you have to concentrate on!"
GW Bush-- from the N.Y. Times
# lib_runlevel v0.9
# Installs selected scripts and set run levels and priorities
# scripts to be installed require the following:
# SGL-script-version=<date in yearmonthday format>
# if SGL-script-version=custom it will be left alone.
# this sets the run levels and priority for links
# SGL-START:<runlevels separated by space>:S<priority>
# SGL-STOP:<runlevels separated by space>:K<priority>

initdir=/etc/init.d
savetime=$(date +%Y%m%d%k%M)

# function to generate proper symlinks for runlevels
# called by installscript

linkscript ()
{
    truncname=$(echo $init_script | cut -d. -f1)
    for action in SGL-START SGL-STOP
      do
# this pulls the second field to get runlevel
      for level in $(grep "# $action" $initdir/$init_script | cut -d: -f2)
        do
# this pulls the third field to get priority
        pri=$(grep "# $action" $initdir/$init_script | cut -d: -f3)
        if [ ! -f /etc/rc$level.d/*$truncname* ]; then
            ln -s $initdir/$init_script /etc/rc$level.d/$pri$truncname
        else
# this checks if priority is correct if there is an existing symlink 
            pri2=$(ls /etc/rc$level.d/*$truncname* | sed s/$truncname// | sed 
s/\.sh// | cut  -d/ -f4)
            if [ ! $pri = $pri2 ]; then
                rm -f /etc/rc$level.d/*$truncname*
                ln -s $initdir/$init_script /etc/rc$level.d/$pri$truncname
            fi
        fi
      done
    done
}

# Function to backup existing scripts and install updated ones
# usage is "installscript <scriptname>"
installscript ()
{

# check for syntax
    if [ -n "$1" ] && [ -e $SCRIPT_DIRECTORY/$1 ]; then
# set init_script to script name
        init_script=$1
        sglver=$(grep "# SGL-script-version=" $SCRIPT_DIRECTORY/$init_script 
| cut -d= -f2)
        if [ -e $initdir/$init_script ]; then
            installedver=$(grep "# SGL-script-version=" $initdir/$init_script 
| cut -d= -f2)
            if [ ! -n "$installedver" ]; then
                installedver=$((0))
            fi
            if [ ! $installedver = custom ] && [ $sglver -gt $installedver ]; 
then
                mv $initdir/$init_script $initdir/$init_script.$savetime
                install  -m  755  $SCRIPT_DIRECTORY/$init_script  $initdir
                linkscript $init_script
            fi
        else
            install  -m  755  $SCRIPT_DIRECTORY/$init_script  $initdir
            linkscript $init_script
        fi
    else
        echo "Usage: installscript <scriptname>"
    fi

}
# end lib_runlevel