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|
#
# Support library for scripts parsing the sitesummary files.
#
package SiteSummary;
require Exporter;
our $VERSION = 0.01;
our @ISA = qw(Exporter);
our @EXPORT = qw(
for_all_hosts
get_filepath_current
get_hostclass
get_site
get_sitegroup
get_hostname
get_dns_address
get_linux_kernel_ver
get_debian_edu_profile
get_debian_edu_ver
);
my $pwd = "/var/lib/sitesummary/entries"; # Path to the entries
# File for debian-edu configuration
my $debian_edu_config = "/debian-edu/config";
sub get_filepath_current {
my ($hostid, $file) = @_;
return "$pwd/$hostid$file";
}
#
# Return the value string from a file, ignoring comments
#
sub get_file_string {
my ($hostid, $filename) = @_;
my $path = get_filepath_current($hostid, $filename);
my $string;
if (open (FILE, $path)) {
while(<FILE>) {
chomp;
s/\#.+$//;
next if (/^\s*$/);
$string = $_;
}
close(FILE);
return $string;
} else {
return undef;
}
}
#
# Return the site string
#
sub get_site {
my $hostid = shift;
return get_file_string($hostid, "/siteinfo/site");
}
#
# Return the sitegroup string
#
sub get_sitegroup {
my $hostid = shift;
return get_file_string($hostid, "/siteinfo/sitegroup");
}
#
# Return the hostclass string
#
sub get_hostclass {
my $hostid = shift;
return get_file_string($hostid, "/siteinfo/hostclass");
}
#
# Return the IP address on the primary network interface
#
sub get_primary_ip_address {
my $hostid = shift;
my $path = get_filepath_current($hostid, "/system/ifconfig-a");
# XXX Not implemented
my $ip;
if (open (FILE, $path)) {
while(<FILE>) {
chomp;
if (m/inet addr:(\S+)\s+/) {
$ip = $1;
last;
}
}
close(FILE);
return $ip;
} else {
return undef;
}
}
#
# Return the hostname string
#
sub get_hostname {
my $hostid = shift;
return get_file_string($hostid, "/system/hostname");
}
#
# Return an address that can be used to contact the host. Prefer DNS,
# but fall back to the IP address if the IP address do not resolve in
# DNS.
#
sub in_dns {
my $hostname = shift;
my $packed_ip = gethostbyname($hostname);
return defined $packed_ip;
}
sub get_dns_address {
my $hostid = shift;
my $hostname = get_hostname($hostid);
# Use IP address as hostname if the provided hostname is bogus or
# missing in DNS.
$hostname = get_primary_ip_address($hostid)
if (! in_dns($hostname) || "localhost" eq $hostname);
return $hostname;
}
#
# Return Linux kernel version for the machines using Linux.
#
sub get_linux_kernel_ver {
my $hostid = shift;
my $path = get_filepath_current($hostid, "/system/uname-smr");
my $kver;
if (open (FILE, $path)) {
while(<FILE>) {
chomp;
s/\#.+$//;
next if (/^\s*$/);
my @f = (split(/\s+/, $_));
$kver = $f[1] if ("Linux" eq $f[0]);
}
close(FILE);
return $kver;
} else {
return undef;
}
}
sub get_debian_edu_profile {
my $hostid = shift;
my $path = get_filepath_current($hostid, $debian_edu_config);
if ( ! -e $path ) {
return undef;
}
if (open (FILE, $path)) {
while (<FILE>) {
chomp;
s/\#.+$//;
next if not (/PROFILE/);
s/^PROFILE=//;
return $_;
}
}
close(FILE);
}
sub get_debian_edu_ver {
my $hostid = shift;
my $path = get_filepath_current($hostid, $debian_edu_config);
if ( ! -e $path ) {
return undef;
}
if (open (FILE, $path)) {
while (<FILE>) {
chomp;
s/\#.+$//;
next if not (/VERSION/);
s/^VERSION=//;
return $_;
}
}
}
sub for_all_hosts {
my $callback = shift;
if ( ! -d $pwd ) {
print STDERR "error: Missing $pwd directory.\n";
return undef;
}
opendir(DIR, $pwd) or die "$!: $pwd\nDied";
my $count = 0;
foreach (readdir(DIR)) {
chomp;
next if m/^$/ || m/^.$/ || m/^..$/;
my $hostid = $_;
if ( -d "$pwd/$hostid" ) {
$count ++ if ($callback->($hostid));
} else {
print STDERR "warning: Junk in filelog: $pwd/$hostid\n";
}
}
closedir(DIR);
return $count;
}
1;
########################################################################
# Local Variables:
# mode: perl
# End:
########################################################################
|
