/**
* 多进程，信号 模拟
* @filename signal.php
* @author Zhenxun Du <[email protected]>
* @time 2018/9/26 下午3:58
* @version SVN:$Id:$
*/
class SignalDemo
{
public $time_start;
public $pid_childs = [];
public $pid_childs_kill = [];
public $config;
public $master_pid;
public $master_status = 1;
public $str = '无';
public function __construct($config)
{
$this->config = $config;
$this->time_start = date('Y-m-d H:i:s');
}
public function run()
{
declare(ticks=1); //pcntl_signal_dispatch();
$this->master_pid = posix_getpid();//主id
$this->clear();//清屏
$this->command();//指令
$this->installSignal();//安装信号
//获取多进程任务
$task_info = $this->config['task_info'];
foreach ($task_info as $info) {
$this->forkOneTask($info);//开启子进程
}
while ($this->master_status) {
$this->printStr();//输出信息
//守护子进程，以下是模拟子进程结束
foreach ($this->pid_childs as $k => $pid) {
posix_kill($pid, SIGUSR1);
pcntl_waitpid($pid, $status);
unset($this->pid_childs[$k]);
$this->str = '主进程把子进程：' . $pid . '杀掉了';
$this->printStr();
sleep(20);
}
$this->str = '无';
sleep(1);
}
echo '您按了 ctrl+c，主进程结束~~~';
}
//开启一个进程
public function forkOneTask($info)
{
$pid = pcntl_fork();
if ($pid === -1) {
echo 'error';
exit;
}
if ($pid) {
$this->pid_childs[] = $pid;
} else {
//子进程
while (true) {
//做你想做的事。。。。。
sleep(2);
if (is_array($this->pid_childs_kill) && in_array(posix_getpid(), $this->pid_childs_kill)) {
exit();
}
}
}
}
//安装信号
public function installSignal($handler = 'signalHandler')
{
pcntl_signal(SIGINT, array($this, $handler));
pcntl_signal(SIGHUP, array($this, $handler));
pcntl_signal(SIGUSR1, array($this, $handler));
}
//收到信号回调
public function signalHandler($signal)
{
switch ($signal) {
case SIGINT:
if (posix_getpid() == $this->master_pid) {
$this->master_status = 0; //设置主进程完毕
} else {
//子进程逻辑
$this->pid_childs_kill[] = posix_getpid();
}
break;
case SIGUSR1:
$this->pid_childs_kill[] = posix_getpid();
break;
}
}
//运行指令
public function command()
{
// 检查运行命令的参数
global $argv;
$start_file = $argv[0];
// 命令
$command = isset($argv[1]) ? trim($argv[1]) : 'start';
// 进程号
$pid = isset($argv[2]) ? $argv[2] : '';
// 根据命令做相应处理
switch ($command) {
case 'start':
break;
case 'stop':
exec("ps aux | grep $start_file | grep -v grep | awk '{print $2}'", $info);
if (count($info) <= 1) {
echo " [$start_file] not run\n";
} else {
echo "[$start_file] stop success";
exec("ps aux | grep $start_file | grep -v grep | awk '{print $2}' |xargs kill -SIGINT", $info);
}
exit;
break;
case 'stop-pid':
echo "[$start_file] stop pid {$pid}";
exec("kill {$pid} -SIGINT");
exit;
break;
case 'kill':
exec("ps aux | grep $start_file | grep -v grep | awk '{print $2}' |xargs kill -SIGKILL");
break;
case 'kill-pid':
exec("kill {$pid} -SIGKILL");
exit;
break;
case 'status':
exit(0);
// 未知命令
default :
exit("Usage: php yourfile.php {start|stop|kill}\n");
}
}
//清屏
public function clear()
{
$arr = array(27, 91, 72, 27, 91, 50, 74);
foreach ($arr as $a) {
echo chr($a);
}
//array_map(create_function('$a', 'print chr($a);'), array(27, 91, 72, 27, 91, 50, 74));
}
//系统负载
public function getSysLoad()
{
$loadavg = sys_getloadavg();
foreach ($loadavg as $k => $v) {
$loadavg[$k] = round($v, 2);
}
return implode(", ", $loadavg);
}
//打印到屏幕
public function printStr()
{
$display_str = '';
$display_str .= "-----------------------<white> PHP多进程与信号模拟操作 </white>-------------------" . PHP_EOL;
$display_str .= '开始时间:' . $this->time_start . PHP_EOL;
$display_str .= "现在时间:" . date('Y-m-d H:i:s') . PHP_EOL;
$display_str .= 'Load average: ' . $this->getSysLoad() . PHP_EOL;
$display_str .= "PHP version:<purple>" . PHP_VERSION . "</purple>" . PHP_EOL;
$display_str .= "当前子进程数: <red>" . count($this->pid_childs) . "个，PID:(" . implode(',', $this->pid_childs) . ")</red>" . PHP_EOL;
$display_str .= "当前主进程PID: <red>" . posix_getpid() . "</red>" . PHP_EOL;
$display_str .= "通知: <red>" . $this->str . "</red>" . PHP_EOL;
$display_str .= "-----------------------<green> By:DuZhenxun </green>--------------------------" . PHP_EOL;
$display_str .= "<yellow>Press Ctrl+C to quit.</yellow>" . PHP_EOL;
$display_str = $this->clearLine($this->replaceStr($display_str));//替换文字,清屏
echo $display_str;
}
//文字替换
public function replaceStr($str)
{
$line = "\033[1A\n\033[K";
$white = "\033[47;30m";
$green = "\033[32;40m";
$yellow = "\033[33;40m";
$red = "\033[31;40m";
$purple = "\033[35;40m";
$end = "\033[0m";
$str = str_replace(array('<n>', '<white>', '<green>', '<yellow>', '<red>', '<purple>'), array($line, $white, $green, $yellow, $red, $purple), $str);
$str = str_replace(array('</n>', '</white>', '</green>', '</yellow>', '</red>', '</purple>'), $end, $str);
return $str;
}
//shell 替换显示
function clearLine($message, $force_clear_lines = NULL)
{
static $last_lines = 0;
if (!is_null($force_clear_lines)) {
$last_lines = $force_clear_lines;
}
// 获取终端宽度
$toss = $status = null;
$term_width = exec('tput cols', $toss, $status);
if ($status || empty($term_width)) {
$term_width = 64; // Arbitrary fall-back term width.
}
$line_count = 0;
foreach (explode("\n", $message) as $line) {
$line_count += count(str_split($line, $term_width));
}
// Erasure MAGIC: Clear as many lines as the last output had.
for ($i = 0; $i < $last_lines; $i++) {
echo "\r\033[K\033[1A\r\033[K\r";
}
$last_lines = $line_count;
return $message . "\n";
}
}
$config = [];
$config['task_info'] = [
['task_id' => 'a_1', 'info' => 'abcd'],
['task_id' => 'a_2', 'info' => '222'],
['task_id' => 'a_3', 'info' => '3333'],
['task_id' => 'a_4', 'info' => '3333'],
];
$obj = new SignalDemo($config);
$obj->run();
PHP多进程与信号 pcntl，Signal
猜你喜欢
转载自blog.csdn.net/duzhenxun/article/details/82899001
今日推荐
周排行