Archive for November, 2015

22
Nov

php pthreads

   Posted by: admin    in Mẹo vặt của hiếu râu 

error_reporting(E_ALL);
class AsyncWebRequest extends Thread {
    public $url;
    public $data;

    public function __construct($url) {
        $this->url = $url;
    }

    public function run() {
        if (($url = $this->url)) {
            /*
             * If a large amount of data is being requested, you might want to
             * fsockopen and read using usleep in between reads
             */
            $this->data = file_get_contents($url);
        } else
            printf("Thread #%lu was not provided a URL\n", $this->getThreadId());
    }
}

$t = microtime(true);
$g = new AsyncWebRequest(sprintf("http://www.google.com/?q=%s", rand() * 10));
/* starting synchronized */
if ($g->start()) {
    printf("Request took %f seconds to start ", microtime(true) - $t);
    while ( $g->isRunning() ) {
        echo ".";
        usleep(100);
    }
    if ($g->join()) {
        printf(" and %f seconds to finish receiving %d bytes\n", microtime(true) - $t, strlen($g->data));
    } else
        printf(" and %f seconds to finish, request failed\n", microtime(true) - $t);
}
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17
Nov

mysql multi instance

   Posted by: admin    in Mẹo vặt của hiếu râu 

mkdir -p /var/lib/mysql2
chown mysql:mysql mysql2


cp -p /etc/my.cnf /etc/my2.cnf


vi my2.cnf




[mysqld]
datadir=/var/lib/mysql2
socket=/var/lib/mysql/mysql2.sock
port=3337

[mysqld_safe]
log-error=/var/log/mysqld2.log
pid-file=/var/run/mysqld/mysqld2.pid








mysql_install_db --user=mysql --datadir=/var/lib/mysql2




mysqld_safe --defaults-file=/etc/my2.cnf &


netstat -antp | grep 3337




mysqladmin -S /var/lib/mysql/mysql2.sock shutdown -p


mysql -S /var/lib/mysql/mysql2.sock -u root -p
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13
Nov

procmail - sendmail subject filter

   Posted by: admin    in Mẹo vặt của hiếu râu

[root@ns6 abc.cadena-it.com]# cat .procmailrc

VERBOSE=off

MAILDIR=$HOME/mail # elm users might use $HOME/Mail instead

DEFAULT=/var/spool/mail/abc.macatung.com

LOGFILE=$HOME/log

CLAMDSCAN=/usr/bin/clamdscan

:0

* ^Subject.*( naked | XXX | sex| Van Tai | Hang Khong | Visa )

/dev/null

:0

* ^From.*(MAILER-DAEMON)

/dev/null

:0

{

RESULT=`$CLAMDSCAN –stdout –no-summary -`

:0 Di

* RESULT ?? FOUND

/dev/null

}

[root@ns6 abc.cadena-it.com]#

general.rc


:0
* ^Cc.*joe@somewhere.org
* ^Cc.*me
{
	:0 c
	$DEFAULT

	:0
	SOME_FOLDER
}

:0
* ^Subject.*something-or-other
! another@address.com

lists.rc

:0
* ^From.*redhat.*list.*list.*@
redhat-lists

:0
* ^From.*owner@independence
independence-list

spam.rc

	  
:0
* ^From.*my-buddy
* ^Subject.*(Fwd|Forward|joke)
/dev/null

:0
* !(To|Cc).*my_address		# this is my account here
* !(To|Cc).*my_address_2	# I get mail forwarded from here
* !From.*my\.domain\.edu	# I trust the locals not to spam
* !From.*list.*@			# don't trash anything from mail lists
* !From.*good-buddy		# sometimes Bcc's me person mail to his sig-other
spam

:0
* ^From.*big-jerk
/dev/null

guestbook.rc

Subject:.*Form Posted
| cat&>$HOME/guestmail && \
$HOME/bin/guestscript $HOME/guestmail

Appendix: egrep regular expressions

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^ matches the beginning of the line
$ matches the end of the line
. Matches any single character
(character)* match arbitrarily many occurences of (character)
(character)? Match 0 or 1 instance of (character)
[abcdef] Match any character enclosed in [] (in this instance, a b c d e or f) ranges of characters such as [a-z] are permitted. The behaviour of this deserves more description. See the page ongrep for more details about the syntax of lists.
[^abcdef] Match any character NOT enclosed in [ ] (in this instance, any character other than a b c d e or f)
(expression) Group operator. Contents of parentheses treated as one character with respect to * , + , ? and | concatenation operators
\n Backreference - matches the contents of the nth set of parentheses
expression1|expression2 Matches expression1 or expression 2.
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