[arch-releng] Automagic Profiles Loader

[Dieter Plaetinck]

On Mon, 6 Apr 2009 00:22:11 +1000
Jud <jud at judfilm.net> wrote:

> This code is to be automatically run from a custom Arch Boot Media, it
> will call aif with the best matching profile.
> 
> Comments and suggestions welcome.
> 
> #!/bin/bash
> # Proof of Concept - Automagic Profiles Loader
> #
> # BASIC HARDWARE DETECT
> #
> 
> # MAC address - output each device on separate line?; array?
> mac=$(ifconfig -a | awk '/HWaddr/ {print $NF, $1}')
> #echo $mac
> 
> # System Architecture - i686/x86_64
> # could use CARCH?
> arch=$(uname -m)
> #echo $arch
> 
> # CPU Brand, Model Name, Processors, Sockets, GHz, Family, Model,
> Stepping, Flags cpu=$(cat /proc/cpuinfo | awk '/^vendor_id/ {print
> $NF; exit}')
> #cpu=$(uname -i)
> cpu2=$(cat /proc/cpuinfo | grep "model name" | awk '{ for (i=4; i<=NF;
> i++) printf("%s ", $i); exit }')
> #cpu2=$(uname -p)
> cpu3=$(cat /proc/cpuinfo | grep -c processor)
> cpu3a=$(cat /proc/cpuinfo | grep "cpu cores" | awk '/^cpu/ {print $NF;
> exit}')
> cpu4=$(cat /proc/cpuinfo | grep -c physical) # need a better
> way; total sockets, ht?
> cpu5=$(cat /proc/cpuinfo | grep MHz | awk '/^cpu/ {printf
> ("%4.1f",$NF/1000); exit}')
> cpu5=${cpu5}GHz
> cpu6=$(cat /proc/cpuinfo | awk '/family/ {print $NF; exit}')
> cpu7=$(cat /proc/cpuinfo | awk '/^model/ {print $NF; exit}')
> cpu8=$(cat /proc/cpuinfo | awk '/^stepping/ {print $NF; exit}')
> cpu9=$(cat /proc/cpuinfo | grep flags | awk ' { for (i=3; i<=NF; i++)
> printf("%s ", $i);exit }')
> #echo $cpu $cpu2 $cpu3 $cpu3a $cpu4 $cpu5 $cpu6 $cpu6a $cpu7 $cpu8
> #echo $cpu9
> 
> # Mainboard Model Number, Chipset - need a much better way
> mb=$(dmesg | grep RSDT | awk '/^ACPI/ {print $6, $7}')
> #mb2=$(dmesg | grep RSDT)
> mb2=$(lspci | grep "Host Bridge")
> #echo $mb
> #echo $mb2
> 
> # Total RAM - GB
> mem=$(cat /proc/meminfo | awk '/^MemTotal/ {printf
> ("%5.1f",$2/1048576)}') mem=${mem/.0/}GB
> #echo $mem
> 
> # Hard Disk Capacity - GB
> #hdd=$(fdisk -l | grep /dev/sda | awk '/^Disk/
> {printf("%5.0f",$5/1000000000)}')
> hdd=$(cat /proc/partitions | grep sda | awk '/sda/
> {printf("%5.0f",$3/1000000); exit}')
> if [[ ${hdd:2:1} =~[1-9] && ${#hdd} -ge 3 ]]; then
> hdd2=$((${hdd:0:1}+1))$(echo "${hdd//[1-9]/0}" | sed 's/^.\{1\}//g')
> else
>  hdd2=$hdd
> fi
> hdd2=${hdd2}HD
> #echo $hdd $hdd2
> 
> # Video Card Vendor - Others?
> vga=$(lspci | grep VGA | tr "[:lower:]" "[:upper:]")
> for i in ATI NVIDIA INTEL; do
>   if [[ $vga == *${i}* ]]; then
>     vga=$i
>   fi
> done
> vga=VGA:$vga
> #echo $vga
> 
> # VirtualMachine - Am I inside the Matrix?
> for i in VBOX VMWARE XEN KVM; do
>   vm=$(dmesg | grep -i -o ${i})
>   if [[ $vm == *${i}* ]]; then
>     vm=${i}; exit 0
>   fi
> done

is there anything wrong with running in a vm? what's your goal here?
preventing your script to work when it's run in a vm?

> 
> testline="$mac $arch $cpu $cpu2 $cpu3 $cpu4 $cpu5 $cpu6 $cpu7 $cpu8
> $cpu9 $mem $hdd2 $vga $vm"
> #echo $testline
> 
> 
> #
> # PROFILE SELECTOR
> #
> 
> #[ -r profiles ]
> cat profiles | while read line; do
>   # Skip Comments and Empty Lines
>   [[ ${line:0:1} == "#" ]] && continue
>   [[ -z "$line" ]] && continue
> 
>   # Profile Filename
>   if [[ ${line:0:1} == "[" ]] ; then
>     answer=$(echo ${line//[/} | cut -d] -f1-1); continue
"$answer?" a name like "$profile" might make more sense here.

>   else
>     # Profile Parameters
>     line=$(echo "$line" | cut -d \# -f1-1 | sed 's/[ \t]*$//')
>     result=""
>     # Match Engine
>     for each_name in $line; do
>       if [[ $testline == *$each_name* ]]; then
>         result=$(echo $result $each_name)
>       fi
>     done
>     # Complete Match?
>     if [[ $result == $line ]]; then
>       echo "Loading Profile..."
>       echo "aif -p automatic -c $answer"
maybe you could actually call aif.  but hey that's just an idea :)
Also I would not exit 0, but rather use the same exitcode as aif
itself. can be useful.
>       exit 0
>     fi
>  fi
> done
> 
> # End of File

I checked your sample config and it looks nice imho.
So it's all blocks of [profilename] with "matching rules" below it
right? 
I'm asking because I remember you said you wanted to be able to reboot
automatically if aif exited successfully.  So I was thinking you could
put such parameters like reboot_on_success in there.  (below the
matching rules, on a per-profile basis). to make your code able to
recognize what is a matching rule and what's an option you could maybe
do like this (just an idea):
[profilename]
match matching rule 1
match matching rule 2
option variable value


Also i would avoid caps as much as possible, it always make it
easier in code if you can know you never need to convert between upper
and lowercase.

PS: APL seems like a good name to me

Dieter