#!/usr/bin/env perl
# IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html

#-------------------------------------------------------------------------------
=head1  syslog 
=head2  syslog command that setsup the syslogd for MS, SV and nodes.
        On MS, it makes sure all the xCAT messages goes to /var/log/messages file,
               it enables syslogd receving logs from remote machies. 
        On MS, it sends all the messages to MS,
               it enables syslogd receving logs from remote nodes. 
        On node,  it sends all the messages its master.  
        Input: none, it takes the following environment variables: 
           OSVER: possible values are sles10, fedora8, redhat5, aix etc.   
=cut
#-------------------------------------------------------------------------------

$master=$ENV{MASTER};

#find syslog configuration files
my $conf_file="/etc/syslog.conf";
my $sysconfig="/etc/sysconfig/syslog";
my $param="SYSLOGD_OPTIONS";
my $init="/etc/init.d/syslog";
my $ng=0;

if ($^O =~ /^aix/i) {
  $sysconfig="";  #AIX does not have this file
  $init="";
}
elsif (($ENV{OSVER} && ($ENV{OSVER} =~ /fedora/i)) || (-f "/etc/fedora-release")) {
  if (-e "/etc/rsyslog.conf") {
    $conf_file="/etc/rsyslog.conf";
    $sysconfig="/etc/sysconfig/rsyslog";
    $init="/etc/init.d/rsyslog";
  }
} elsif (($ENV{OSVER} && ($ENV{OSVER} =~ /sles|suse/i)) || (-f "/etc/SuSE-release")) { 
  #find out which syslog is used for SLES, syslog or syslog-ng
  $result=`grep "^SYSLOG_DAEMON=" $sysconfig 2>&1`;
  if ($result) {
    if ($result =~ /syslog-ng/) {
      $conf_file="/etc/syslog-ng/syslog-ng.conf";
      $ng=1;
    }
  } 
}

#handle sysconfig file to make remote loggling possible
if (($sysconfig) && (-e $sysconfig)) { 
  if (! -f "$sysconfig.XCATORIG") {
    `cp -f $sysconfig $sysconfig.XCATORIG`;
  }
  open(FILE1, "<$sysconfig");
  open(FILE2, ">$sysconfig.tmp");
  while (readline(FILE1)) {
    if (/^$param=/) {
      if (-e "/etc/xCATMN") {
        #on MN: make the syslogd be able to receive remote logs 
	if ($_ !~ /-r/) { s/$param=\"/$param=\"-r /; }
      } elsif (-e "/etc/xCATSN") {
        #on SN: make the syslog be able to receive and forward remote logs
	if ($_ !~ /-h/) { s/$param=\"/$param=\"-h /; }
	if ($_ !~ /-r/) { s/$param=\"/$param=\"-r /; }
      }
      #turn off the time marker on all 
      if ($_ !~ /-m0|-m 0/) { s/$param=\"/$param=\"-m 0 /; }
    }
    print FILE2 $_;
  }
  close(FILE1);
  close(FILE2);
  `mv -f $sysconfig.tmp $sysconfig`;   
}

#syslog-ng has different way of enabling log forwarding
if (($ng) && (-e "/etc/xCATSN")) {
  if (! -f "$conf_file.XCATORIG") {
    `cp -f $conf_file $conf_file.XCATORIG`;
  }
  open(FILE1, "<$conf_file");
  open(FILE2, ">$conf_file.tmp");
  while (readline(FILE1)) {
    s/\#udp\(ip\(\"0.0.0.0/udp\(ip\(\"0.0.0.0/;
    print FILE2 $_;
  }
  close(FILE1);
  close(FILE2);
  `mv -f $conf_file.tmp $conf_file`;   
} 

#now handling where the logs go
if (-e "/etc/xCATMN") {
  #making sure all the messages goes to /var/log/messages
  `touch  /var/log/messages`; #log file must exist first
  if (!$ng) {
    if (! -f "$conf_file.XCATORIG") {
      `cp -f $conf_file $conf_file.XCATORIG`;
    }
    if ($^O =~ /aix/i) {
      `echo "*.debug;*.crit;*.err;*.warning   /var/log/messages  rotate 1024K files 5" >> $conf_file`;
    } else {
      `echo "*.debug;*.crit;*.err;*.warning   /var/log/messages" >> $conf_file`;
    }
  }
} else {
  #now make the syslogd fowarding the messages to the the master
  if ($ng) {
    if (! -f "$conf_file.XCATORIG") {
      `cp -f $conf_file $conf_file.XCATORIG`;
    }
    `echo "destination loghost { udp(\\\"$master\\\"); };" >> $conf_file`;
    `echo 'log { source(src); destination(loghost); };' >> $conf_file`;
   } else {
    if (-f "$conf_file.XCATORIG") {  `rm -f $conf_file`; }
    else {  `mv -f $conf_file $conf_file.XCATORIG`;  }
    `echo "*.* \@$master" > $conf_file`;
  }
}

#restart the syslog daemon to take the new conf file settings
#print "init=$init\nconf_file=$conf_file\nsysconfig=$sysconfig\n";
if ($^O =~ /aix/i) { `refresh -s syslogd`; }
else {  `$init restart`; }

#keep a record
`logger -t xcat "Install: syslog setup"`;

exit 0