public function command_start($params)
{
$jobname = $params['jobname'];
$setting = $this->config->get($jobname);
$command = $setting['command'];
$cmdparams = $setting['params'];
$buffersize = $setting['buffersize'];
$writelog = $setting['writelog'];
$pid = $this->shm_process_getpid($jobname);
if ($pid) {
// 检查进程是否正在运行
if ($this->process_exists($pid)) {
$this->client_return('FAILED');
$this->server_echo("FAILED. (process \"{$jobname}\"({$pid}) has already exist.)");
return FALSE;
} else {
// 检查进程是否回收结束
if ($this->shm_process_getpid($jobname)) {
$this->client_return('FAILED');
$this->server_echo("FAILED. (process \"{$jobname}\"({$pid}) is still exiting.)");
return FALSE;
}
}
}
if (!file_exists($command)) {
// 文件不存在
$this->client_return('FAILED');
$this->server_echo("FAILED. (command path \"{$command}\" does not exist.)");
return FALSE;
}
// 新建孙子进程
$pid = pcntl_fork();
if ($pid == -1) {
$this->client_return('FAILED');
$this->server_echo('pcntl_fork() failed.');
return FALSE;
} else {
if ($pid) {
pcntl_waitpid($pid, $status);
return TRUE;
}
}
// 子进程
$t_pid = pcntl_fork();
if ($t_pid == -1) {
$this->client_return('FAILED');
$this->server_echo('pcntl_fork() failed.');
return FALSE;
} else {
if ($t_pid) {
exit;
}
}
// 孙子进程
$this->jobname = $jobname;
$this->writelog = $writelog;
$this->buffersize = $buffersize;
$newline = !isset($params['newline']) ? TRUE : $params['newline'];
if (ProcessContainer::dup2_available()) {
// 使用 dup2 手工配置管道定向
} else {
// 需要在proc_open前关闭socket，否则会被proc_open进程继承，导致socket端口被占用
$this->client_return('OK');
$this->server_echo('OK', $newline);
$this->socket_close();
}
$process = new ProcessContainer($command, $cmdparams, TRUE);
$process->register_output_handler(array($this, 'process_output_handler'));
$process->register_error_handler(array($this, 'process_error_handler'));
$process->register_exit_handler(array($this, 'process_exit_handler'));
$process->register_child_init_handler(array($this, 'process_child_init_handler'));
if (!$process->start()) {
if (ProcessContainer::dup2_available()) {
$this->client_return('FAILED');
$this->server_echo('FAILED. (output_buffer init failed.)');
$this->socket_close();
}
return FALSE;
}
// 进程配置写入共享内存
$process_pid = $process->get_pid();
$this->shm_process_updatepid($jobname, $process_pid);
// 创建共享变量用于输出缓冲
$output_buffer = array();
if (!$this->shm->put_var('ob_' . $jobname, $output_buffer, TRUE)) {
if (ProcessContainer::dup2_available()) {
$this->client_return('FAILED');
$this->server_echo('FAILED. (output_buffer init failed.)');
$this->socket_close();
}
return FALSE;
}
if (ProcessContainer::dup2_available()) {
$this->client_return('OK');
$this->server_echo('OK', $newline);
$this->socket_close();
}
$process->loop_read();
exit;
}
