Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v8plus / lib / perl5 / 5.8.8 / syslog.pl

#
# syslog.pl
#
# $Log: syslog.pl,v $
# 
# tom christiansen <tchrist@convex.com>
# modified to use sockets by Larry Wall <lwall@jpl-devvax.jpl.nasa.gov>
# NOTE: openlog now takes three arguments, just like openlog(3)
#
# call syslog() with a string priority and a list of printf() args
# like syslog(3)
#
#  usage: require 'syslog.pl';
#
#  then (put these all in a script to test function)
#               
#
#       do openlog($program,'cons,pid','user');
#       do syslog('info','this is another test');
#       do syslog('mail|warning','this is a better test: %d', time);
#       do closelog();
#       
#       do syslog('debug','this is the last test');
#       do openlog("$program $$",'ndelay','user');
#       do syslog('notice','fooprogram: this is really done');
#
#       $! = 55;
#       do syslog('info','problem was %m'); # %m == $! in syslog(3)

package syslog;

use warnings::register;

$host = 'localhost' unless $host;       # set $syslog'host to change

if ($] >= 5 && warnings::enabled()) {
   warnings::warn("You should 'use Sys::Syslog' instead; continuing");
} 

require 'syslog.ph';

eval 'use Socket; 1'                   ||
    eval { require "socket.ph" }       ||
    require "sys/socket.ph";

$maskpri = &LOG_UPTO(&LOG_DEBUG);

sub main'openlog {
   ($ident, $logopt, $facility) = @_;  # package vars
   $lo_pid = $logopt =~ /\bpid\b/;
   $lo_ndelay = $logopt =~ /\bndelay\b/;
   $lo_cons = $logopt =~ /\bcons\b/;
   $lo_nowait = $logopt =~ /\bnowait\b/;
   &connect if $lo_ndelay;
} 

sub main'closelog {
   $facility = $ident = '';
   &disconnect;
} 

sub main'setlogmask {
   local($oldmask) = $maskpri;
   $maskpri = shift;
   $oldmask;
}

sub main'syslog {
   local($priority) = shift;
   local($mask) = shift;
   local($message, $whoami);
   local(@words, $num, $numpri, $numfac, $sum);
   local($facility) = $facility;       # may need to change temporarily.

   die "syslog: expected both priority and mask" unless $mask && $priority;

   @words = split(/\W+/, $priority, 2);# Allow "level" or "level|facility".
   undef $numpri;
   undef $numfac;
   foreach (@words) {
       $num = &xlate($_);              # Translate word to number.
       if (/^kern$/ || $num < 0) {
           die "syslog: invalid level/facility: $_\n";
       }
       elsif ($num <= &LOG_PRIMASK) {
           die "syslog: too many levels given: $_\n" if defined($numpri);
           $numpri = $num;
           return 0 unless &LOG_MASK($numpri) & $maskpri;
       }
       else {
           die "syslog: too many facilities given: $_\n" if defined($numfac);
           $facility = $_;
           $numfac = $num;
       }
   }

   die "syslog: level must be given\n" unless defined($numpri);

   if (!defined($numfac)) {    # Facility not specified in this call.
       $facility = 'user' unless $facility;
       $numfac = &xlate($facility);
   }

   &connect unless $connected;

   $whoami = $ident;

   if (!$ident && $mask =~ /^(\S.*):\s?(.*)/) {
       $whoami = $1;
       $mask = $2;
   } 

   unless ($whoami) {
       ($whoami = getlogin) ||
           ($whoami = getpwuid($<)) ||
               ($whoami = 'syslog');
   }

   $whoami .= "[$$]" if $lo_pid;

   $mask =~ s/%m/$!/g;
   $mask .= "\n" unless $mask =~ /\n$/;
   $message = sprintf ($mask, @_);

   $sum = $numpri + $numfac;
   unless (send(SYSLOG,"<$sum>$whoami: $message",0)) {
       if ($lo_cons) {
           if ($pid = fork) {
               unless ($lo_nowait) {
                   do {$died = wait;} until $died == $pid || $died < 0;
               }
           }
           else {
               open(CONS,">/dev/console");
               print CONS "<$facility.$priority>$whoami: $message\r";
               exit if defined $pid;           # if fork failed, we're parent
               close CONS;
           }
       }
   }
}

sub xlate {
   local($name) = @_;
   $name = uc $name;
   $name = "LOG_$name" unless $name =~ /^LOG_/;
   $name = "syslog'$name";
   defined &$name ? &$name : -1;
}

sub connect {
   $pat = 'S n C4 x8';

   $af_unix = &AF_UNIX;
   $af_inet = &AF_INET;

   $stream = &SOCK_STREAM;
   $datagram = &SOCK_DGRAM;

   ($name,$aliases,$proto) = getprotobyname('udp');
   $udp = $proto;

   ($name,$aliases,$port,$proto) = getservbyname('syslog','udp');
   $syslog = $port;

   if (chop($myname = `hostname`)) {
       ($name,$aliases,$addrtype,$length,@addrs) = gethostbyname($myname);
       die "Can't lookup $myname\n" unless $name;
       @bytes = unpack("C4",$addrs[0]);
   }
   else {
       @bytes = (0,0,0,0);
   }
   $this = pack($pat, $af_inet, 0, @bytes);

   if ($host =~ /^\d+\./) {
       @bytes = split(/\./,$host);
   }
   else {
       ($name,$aliases,$addrtype,$length,@addrs) = gethostbyname($host);
       die "Can't lookup $host\n" unless $name;
       @bytes = unpack("C4",$addrs[0]);
   }
   $that = pack($pat,$af_inet,$syslog,@bytes);

   socket(SYSLOG,$af_inet,$datagram,$udp) || die "socket: $!\n";
   bind(SYSLOG,$this) || die "bind: $!\n";
   connect(SYSLOG,$that) || die "connect: $!\n";

   local($old) = select(SYSLOG); $| = 1; select($old);
   $connected = 1;
}

sub disconnect {
   close SYSLOG;
   $connected = 0;
}

1;