diff options
Diffstat (limited to 'trunk/add-syslog')
| -rwxr-xr-x | trunk/add-syslog | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/trunk/add-syslog b/trunk/add-syslog new file mode 100755 index 0000000..c846218 --- /dev/null +++ b/trunk/add-syslog @@ -0,0 +1,235 @@ +#!/usr/bin/perl +# rpm helper scriptlet to add a syslog entry (sysklogd and syslog-ng) +# $Id$ +use Getopt::Std; +use strict; + +my %opts = ( + s => '/dev/log', + f => undef, + m => 'debug', + M => 'emerg' +); +getopts('s:f:m:M:', \%opts); +my ($source, $facility, $min, $max) = @opts{qw/s f m M/}; + +die <<EOF if @ARGV < 3; +usage: $0 [options] <pkg> <nb> <dest> +Available options: +-s <source> source (default: /dev/log) +-f <facility> facility (default: first local available) +-m <priority> min priority (default: debug) +-M <priority> max priority (default: emerg) +EOF +my ($package, $number, $dest) = @ARGV; + +# don't do anything for upgrade +exit(0) if $number == 2; + +# check arguments +my @facilities = qw/auth authpriv cron daemon \ + kern lpr mail mark news syslog \ + user uucp local0 local1 local2 \ + local3 local4 local5 local6 local7/; +my %facilities = map { $_ => 1 } @facilities; + +die "invalid facility '$facility'" if $facility && !$facilities{$facility}; + +my $i; +my @priorities = qw/debug info notice warning err crit alert emerg/; +my %priorities = map { $_ => $i++ } @priorities; + +die "invalid min priority '$min'" if $min && ! defined $priorities{$min}; +die "invalid max priority '$max'" if $max && ! defined $priorities{$max}; +die "maximum priority '$max' lower than minimum priority '$min'" + if $min && $max && ($priorities{$max} < $priorities{$min}); + +if (!$facility) { + my @local_facilities; + # parse all configuration files, and count occurences of local facilities + if (-f '/etc/syslog.conf') { + open(my $in, '<', '/etc/syslog.conf') + or die "Can't open /etc/syslog.conf for reading: $!"; + while (my $line = <$in>) { + $local_facilities[$1]++ if $line =~ /^local(\d)/; + } + close($in); + } + if (-f '/etc/syslog-ng.conf') { + open(my $in, '<', '/etc/syslog-ng.conf') + or die "Can't open /etc/syslog-ng.conf for reading: $!"; + while (my $line = <$in>) { + $local_facilities[$1]++ if $line =~ /facility\(local(\d)\)/; + } + close($in); + } + # use first facility without occurences + for my $i (1 .. 7) { + next unless $local_facilities[$i] == 0; + $facility = "local$i"; + last; + } + die "no available free facility" unless $facility; +} + +add_sysklogd_entry($package, $source, $dest, $facility, $min, $max) + if -f '/etc/syslog.conf'; + +add_syslogng_entry($package, $source, $dest, $facility, $min, $max) + if -f '/etc/syslog-ng.conf'; + +# output used facility as feedback +print $facility; + +sub add_sysklogd_entry { + my ($package, $source, $dest, $facility, $min, $max) = @_; + + # ensure source is configured + if ($source ne '/dev/log') { + my ($content, $changed); + open(my $in, '<', '/etc/sysconfig/syslog') + or die "Can't open /etc/sysconfig/syslog for reading: $!"; + while (my $line = <$in>) { + if ($line =~ /^SYSLOGD_OPTIONS=(["'])?(.*)\1/) { + my $quote = $1; + my $options = $2; + if ($options !~ /-a\s+$source/) { + $options .= " -a $source"; + $changed = 1; + } + $content .= + "SYSLOGD_OPTIONS=" . $quote . $options. $quote . "\n"; + } else { + $content .= $line; + } + } + close($in); + + if ($changed) { + open(my $out, '>', '/etc/sysconfig/syslog') + or die "Can't open /etc/sysconfig/syslog for writing: $!"; + print $out $content; + close($out); + } + } + + # compute selector + my $selector; + if ($max eq 'emerg') { + if ($min eq 'debug') { + $selector = "$facility.*"; + } else { + $selector = "$facility.$min"; + } + } else { + for my $i ($priorities{$min} .. $priorities{$max}) { + $selector .= ';' if $selector; + $selector .= "$facility.=$priorities[$i]"; + } + } + + # compute spacing to keep default configuration file formatting + my $tabs = length($selector) < 48 ? + ((48 - length($selector)) / 8) : + 1; + + # append entry + open(my $out, '>>', '/etc/syslog.conf') + or die "Can't open /etc/syslog.conf for appending: $!"; + print $out "# BEGIN: Automatically added by $package installation\n"; + print $out $selector . ("\t" x $tabs) . '-' . $dest . "\n"; + print $out "# END\n"; + close($out); + + # relaunch syslog + system('service syslog condrestart 2>&1 >/dev/null'); +} + +sub add_syslogng_entry { + my ($package, $source, $dest, $facility, $min, $max) = @_; + + # read it first to check its content + my ($source_id, $destination_id, $facility_id, $level_id); + my $level = $min eq $max ? $max : "$min..$max"; + open(my $fh, '<', '/etc/syslog-ng.conf') + or die "Can't open /etc/syslog-ng.conf for reading: $!"; + + while (my $line = <$fh>) { + if ($line =~ /^source \s+ (\S+) \s+ {/x) { + # source block + my $id = $1; + SOURCE: + while (1) { + if ($line =~ /(?:unix-stream|file) \s* \( (["']) ([^\1]+) \1/x) { + my $value = $2; + $source_id = $id if $source eq $value; + } + last SOURCE if $line =~ /};/; + $line = <$fh>; + last SOURCE if !$line; + } + } elsif ($line =~ /^destination \s+ (\S+) \s+ {/x) { + # destination block + my $id = $1; + DESTINATION: + while (1) { + if ($line =~ /file \s* \( (["']) ([^\1]+) \1/x) { + my $value = $2; + $destination_id = $id if $dest eq $value; + } + last DESTINATION if $line =~ /};/; + $line = <$fh>; + last DESTINATION if !$line; + } + } elsif ($line =~ /^filter \s+ (\S+) \s+ {/x) { + # filter block + my $id = $1; + FILTER: + while (1) { + if ($line =~ /facility \s* \( ([^)]+) \)/x) { + my $value = $1; + $facility_id = $id if $facility eq $value; + } + if ($line =~ /level \s* \( ([^)]+) \)/x) { + my $value = $1; + $level_id = $id if $level eq $value; + } + last FILTER if $line =~ /};/; + $line = <$fh>; + last FILTER if !$line; + } + } + } + close($fh); + + # then append what is needed + open(my $out, '>>', '/etc/syslog-ng.conf') + or die "Can't open /etc/syslog-ng.conf for appending: $!"; + + print $out "# BEGIN: Automatically added by $package installation\n"; + if (!$source_id) { + $source_id = 's_' . $package; + print $out "source $source_id { unix-stream('$source'); };\n"; + } + if (!$destination_id) { + $destination_id = 'd_' . $package; + print $out "destination $destination_id { file('$dest'); };\n"; + } + if (!$facility_id) { + $facility_id = 'f_facility_' . $package; + print $out "filter $facility_id { facility($facility); };\n"; + } + if (!$level_id) { + $level_id = 'f_level_' . $package; + print $out "filter $level_id { level($level); };\n"; + } + print $out "log { source($source_id);" . + " filter($facility_id);" . + " filter($level_id);" . + " destination($destination_id); };\n"; + print $out "# END\n"; + close($out); + + # relaunch syslog-ng + system('service syslog-ng condrestart 2>&1 >/dev/null'); +} |