#!/usr/bin/env perl

# $Id: setup.pl,v 1.14 2004/07/12 07:50:13 bernisys Exp $

# include PERL libraries
use strict;
use warnings;
use diagnostics;

# include HotSaNIC libraries
use lib "../../lib";
use lib "./platform";
use HotSaNICparser;
use HotSaNICshellio;
use HotSaNIClog;
use common;

$|=1;

(my $VERSION = '$Revision: 1.14 $') =~ s/.*(\d+\.\d+).*/$1/;
(my $IDENTIFIER = '$Id: setup.pl,v 1.14 2004/07/12 07:50:13 bernisys Exp $') =~ s/.*,v (.*) \$/$1/;

my $MODNAME=HotSaNICparser::get_module_name();
my %MODCONF=HotSaNICmod::common::configure();
my $OUTFILE="settings.new";
if ( ! -e "settings" ) { $OUTFILE="settings"; }
open OUTFILE,">$OUTFILE" || die "could not open ".HotSaNICparser::get_module_name()." settings file for writing.\n";

if (! @{$MODCONF{DEV}}) { @{$MODCONF{DEV}}=get_devs(); }
if (@{$MODCONF{DEV}}) { $MODCONF{DEV}="DEV=\"".join("\"\nDEV=\"",@{$MODCONF{DEV}})."\""; }
else { $MODCONF{DEV}=""; }

print OUTFILE "# SHORT DESCRIPTION
#
# kernel version
# KERNEL=\"2.2\" for 2.1.x and 2.2.x kernels
# KERNEL=\"2.4\" for 2.3.x and 2.4.x kernels
# etc.
#
KERNEL=\"$MODCONF{KERNEL}\"

# set the correct datasource for kernel 2.4 and later
# use \"stat\" for kernels <2.4 and for 2.4 kernels
# without /proc/partitions stats support
# 2.6 kernels might support /proc/diskstats as well, which
# seems to be pretty identical with /proc/partitions
# 
# SOURCE=\"stat\"
# SOURCE=\"partitions\"
# SOURCE=\"diskstats\"
#
SOURCE=\"$MODCONF{SOURCE}\"

# all entries have to be of the form:
# DEV=<device>,<device name>
#
# <device>       the device-number as in /proc/stat -> disk_io
#                for kernels < 2.3 \"0\" is the first drive, \"1\" the second ...
#                <2.3 kernels support (unless patched) only 4 drives.
#
# <device name>  a description for the device
#
# Example for Kernel >= 2.3:
# DEV=8_0,sda
# DEV=3_0,hda
# DEV=22_0,hdc
#
# Example for Kernel <= 2.2:
# DEV=0,hda
# DEV=1,hdb
#
$MODCONF{DEV}
";

close OUTFILE;

if ($OUTFILE eq "settings.new") {
  HotSaNICparser::backup_file("settings");
  rename "settings.new","settings";
  }

print "Please check the settings file and adapt it to satisfy your needs.\n";

sub get_devs {
# see kernel2.4 /usr/src/linux/fs/proc/proc_misc.c
  my @devs=();
  my %devlist = (  "3_0"  => "/dev/hda",  "3_64" => "/dev/hdb", "22_0"  => "/dev/hdc", "22_64" => "/dev/hdd",
                  "33_0"  => "/dev/hde", "33_64" => "/dev/hdf", "34_0"  => "/dev/hdg", "34_64" => "/dev/hdh",
                   "8_0"  => "/dev/sda",  "8_1"  => "/dev/sdb",  "8_2"  => "/dev/sdc",  "8_3"  => "/dev/sdd",
                   "8_4"  => "/dev/sde",  "8_5"  => "/dev/sdf",  "8_6"  => "/dev/sdg",  "8_7"  => "/dev/sdh",
                   "8_8"  => "/dev/sdi",  "8_9"  => "/dev/sdj",  "8_10" => "/dev/sdk",  "8_11" => "/dev/sdl",
                   "8_12" => "/dev/sdm",  "8_13" => "/dev/sdn",  "8_14" => "/dev/sdo");

  if ($^O eq "netbsd") {
    open RESULT,"/usr/sbin/iostat -Ix|";
    while (<RESULT>) {
      chomp;
      my ($drv) = split / /, $_;
      next if ($drv =~ /device/ || $drv =~ /md?/ ||$drv =~ /fd?/);
      push @devs,"$drv,$drv";
      }
    }
  elsif ($^O eq "linux") {
    my $usepart=0;
    if (-e "/proc/partitions") {
      open STAT,"/proc/partitions";
      my $check=<STAT>;
      if ($check =~ /rio/) {
        $usepart=1;	        
        while (<STAT>) {
	  if ($_ ne "\n") {
            my ($major,$minor,undef,$device)=split;
            if (HotSaNICshellio::askyesno("Use $device","y") eq "y") {
              push @devs,$major."_$minor,$device";
              }
            }
          }
        }
      close STAT;
      }
    if ($usepart == 0) {
      open STAT,"/proc/stat";
      while (<STAT>) {
        chomp;
        if (/disk_io/) {
          foreach (split) {
            next if /disk_io:/;
  	  my $major;
  	  my $minor;
  	  /\(([0-9]+),([0-9]+)\)/, $major=$1, $minor=$2;
  	  my $device=$devlist{$major."_$minor"};
  	  if (HotSaNICshellio::askyesno("Use $device","y") eq "y") {
              push @devs,$major."_$minor,$device";
              }
            }
          last;
          }
        }
      }
    }
  else { print "not supported yet, sorry\n"; }
  return @devs;
  }

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