Why all the futzing around with external programs when you can do it with just Perl?
#! /usr/local/bin/perl -w
use IO::Socket::INET;
print "syslog is ", check_syslog( 'localhost' ) ? 'up' : 'down', "\n"
+;
sub check_syslog {
my $s = IO::Socket::INET->new(
PeerHost => $_[0],
Timeout => 1,
Proto => 'udp',
PeerPort => 514,
);
return 0 unless $s;
close $s;
return 1;
}
In other words, just see whether you can connect to the socket that syslogd opens. Much easier than fiddling around with ps, grep, pidfiles and/or procfs.
- another intruder with the mooring of the heart of the Perl
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