nginx环境下配置nagios-关于perl-fcgi.pl

配置文件如下：

请注意，网上提供的官方文档在运行时可能会出现问题，此文中保证无问题。

#!/usr/bin/perl
#
# author Daniel Dominik Rudnicki
# thanks to: Piotr Romanczuk
# email daniel@sardzent.org
# version 0.4.3
# webpage http://www.nginx.eu/ #
# BASED @ http://wiki.codemongers.com/NginxSimpleCGI #
#
# use strict;
use FCGI;
use Getopt::Long;
use IO::All;
use Socket;

sub init {
GetOptions( "h" => \$help,
"verbose!"=>\$verbose,
"pid=s" => \$filepid,
"l=s" => \$logfile,
"S:s" => \$unixsocket,
"P:i" => \$unixport) or usage();
usage() if $help;

print " Starting Nginx-fcgi\n" if $verbose;
print " Running with $> UID" if $verbose;
print " Perl $]" if $verbose;

# if ( $> == "0" ) {
# print "\n\tERROR\tRunning as a root!\n";
# print "\tSuggested not to do so !!!\n\n";
# exit 1;
# }

if ( ! $logfile ) {
print "\n\tERROR\t log file must declared\n"
. "\tuse $0 with option -l filename\n\n";
exit 1;
}
print " Using log file $logfile\n" if $verbose;
"\n\n" >> io($logfile);
addlog($logfile, "Starting Nginx-cfgi");
addlog($logfile, "Running with $> UID");
addlog($logfile, "Perl $]");
addlog($logfile, "Testing socket options");

if ( ($unixsocket && $unixport) || (!($unixsocket) && !($unixport)) ) {
print "\n\tERROR\tOnly one option can be used!\n";
print "\tSuggested (beacuse of speed) is usage UNIX socket -S \n\n";
exit 1;
}

if ($unixsocket) {
print " Daemon listening at UNIX socket $unixsocket\n" if $versbose;
addlog($logfile, "Deamon listening at UNIX socket $unixsocket");
} else {
print " Daemon listening at TCP/IP socket *:$unixport\n" if $verbose;
#
addlog($logfile, "Daemon listening at TCP/IP socket *:$unixport");
}

if ( -e $filepid ) {
print "\n\tERROR\t PID file $filepid already exists\n\n";
addlog($logfile, "Can not use PID file $filepid, already exists.");
exit 1;
}

if ( $unixsocket ) {
print " Creating UNIX socket\n" if $verbose;
$socket = FCGI::OpenSocket( $unixsocket, 10 );
if ( !$socket) {
print " Couldn't create socket\n";
addlog($logfile, "Couldn't create socket");
exit 1;
}
print " Using UNIX socket $unixsocket\n" if $verbose;
} else {
print " Creating TCP/IP socket\n" if $verbose;
$portnumber = ":".$unixport;
$socket = FCGI::OpenSocket( $unixport, 10 );
if ( !$socket ) {
print " Couldn't create socket\n";
addlog($logfile, "Couldn't create socket");
exit 1;
}
print " Using port $unixport\n" if $verbose;
}
addlog($logfile, "Socket created");

if ( ! $filepid ) {
print "\n\tERROR\t PID file must declared\n"
. "\tuse $0 with option -pid filename\n\n";
exit 1;
}
print " Using PID file $filepid\n" if $verbose;
addlog($logfile, "Using PID file $filepid");

my $pidnumber = $$;
$pidnumber > io($filepid);
print " PID number $$\n" if $verbose;
addlog($logfile, "PID number $pidnumber");

}

sub addzero {
my ($date) = shift;
if ($date < 10) {
return "0$date";
}
return $date;
}

sub logformat {
my ($sec,$min,$hour,$mday,$mon,$year,$wday,$yday,$iddst) = localtime(time);
my $datestring;
$year += 1900;
$mon++;
$mon = addzero($mon);
$mday = addzero($mday);
$min = addzero($min);
$datestring = "$year-$mon-$mday $hour:$min";
return($datestring);
}

sub addlog {
my ($log_file, $log_message) = @_;
my $curr_time = logformat();
my $write_message = "[$curr_time] $log_message";
$write_message >> io($log_file);
"\n" >> io($log_file);
}

sub printerror {
my $message = @_;
print "\n Nginx FastCGI\tERROR\n"
. "\t $message\n\n";
exit 1;
}

sub usage {
print "\n Nginx FastCGI \n"
. "\n\tusage: $0 [-h] -S string -P int\n"
. "\n\t-h\t\t: this (help) message"
. "\n\t-S path\t\t: path for UNIX socket"
. "\n\t-P port\t\t: port number"
. "\n\t-p file\t\t: path for pid file"
. "\n\t-l file\t\t: path for logfile"
. "\n\n\texample: $0 -S /var/run/nginx-perl_cgi.sock -l /var/log/nginx/nginx-cfgi.log -pid /var/run/nginx-fcgi.pid\n\n";
exit 1;
}

init;
exit unless $@ =~ /^fakeexit/;
} ;

# fork part
my $pid = fork();

if( $pid == 0 ) {
&main;
exit 0;
}

print " Forking worker process with PID $pid\n" if $verbose;
addlog($logfile, "Forking worker process with PID $pid");
print " Update PID file $filepid\n" if $verbose;
addlog($logfile, "Update PID file $filepid");
$pid > io($filepid);
print " Worker process running.\n" if $verbose;
addlog ($logfile, "Parent process $$ is exiting");
exit 0;

sub main {
$request = FCGI::Request( \*STDIN, \*STDOUT, \*STDERR, \%req_params, $socket );
if ($request) { request_loop()};
FCGI::CloseSocket( $socket );
}

sub request_loop {
while( $request->Accept() >= 0 ) {
# processing any STDIN input from WebServer (for CGI-POST actions)
$stdin_passthrough = '';
$req_len = 0 + $req_params{'CONTENT_LENGTH'};
if (($req_params{'REQUEST_METHOD'} eq 'POST') && ($req_len != 0) ){
while ($req_len) {
$stdin_passthrough .= getc(STDIN);
$req_len--;
}
}

# running the cgi app
if ( (-x $req_params{SCRIPT_FILENAME}) &&
(-s $req_params{SCRIPT_FILENAME}) &&
(-r $req_params{SCRIPT_FILENAME})
){
foreach $key ( keys %req_params){
$ENV{$key} = $req_params{$key};
}
if ( $verbose ) {
addlog($logfile, "running $req_params{SCRIPT_FILENAME}");
}
# http://perldoc.perl.org/perlipc.html#Safe-Pipe-Opens #
#open $cgi_app, '-|', $req_params{SCRIPT_FILENAME}, $stdin_passthrough or print("Content-type: text/plain\r\n\r\n"); print "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !\n"; # addlog($logfile, "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !");
open $cgi_app, '-|', "echo '$stdin_passthrough' | '$req_params{SCRIPT_FILENAME}'" or print("Content-type: text/plain\r\n\r\n"); print "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !\n"; # addlog($logfile, "Error: CGI app returned no output - Executing $req_params{SCRIPT_FILENAME} failed !");

if ($cgi_app) {
print <$cgi_app>;
close $cgi_app;
}
} else {
print("Content-type: text/plain\r\n\r\n");
print "Error: No such CGI app - $req_params{SCRIPT_FILENAME} may not exist or is not executable by this process.\n";
addlog($logfile, "Error: No such CGI app - $req_params{SCRIPT_FILENAME} may not exist or is not executable by this process.");
}
}
}