php - System_Daemon 无法打开流/var/log/mydaemonname.log

Question

我正在尝试通过 cli 运行这个简单的守护进程

function doTask(){

    echo 'mytest';
}
// Include PEAR's Daemon Class
require_once "/usr/share/php/System/Daemon.php";

// Bare minimum setup
System_Daemon::setOption("appName", "mydaemonname2");

try{
// Spawn Deamon!
System_Daemon::start();

// Your PHP Here!
while (true) {
    doTask();
}

// Stop daemon!
System_Daemon::stop();
}
catch (Exception $e) {
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}



notice: Starting mydaemonname daemon, output in: '/var/log/mydaemonname.log'
[Feb 08 12:17:23]  warning: [PHP Error] file_put_contents(/var/log/mydaemonname.log): failed to open stream: Permission denied 

在我的本地主机和我的开发服务器中。

如果我尝试粗略地创建 chmod 777 文件权限并将其设置为/var/log/mydaemonname.log我收到其他错误

[Feb 08 12:30:31]   notice: Starting mydaemonname daemon, output in: '/var/log/mydaemonname.log'
[Feb 08 12:30:31]      err: Unable to create directory: '/var/run/mydaemonname' [l:1366]
[Feb 08 12:30:31]    emerg: Unable to write pid file /var/run/mydaemonname/mydaemonname.pid [l:1272]
[Feb 08 12:30:31]     info: Process was not daemonized yet, just halting current process

如果我尝试为/var/run/mydaemonname 设置 777 文件权限，我会在日志文件中得到它

 notice: Starting mydaemonname daemon, output in: '/var/log/mydaemonname.log'
[Feb 08 12:17:06]      err: Unable to change group of file '/var/run/mydaemonname/mydaemonname.pid' to 0 [l:1425]
[Feb 08 12:17:06]     crit: Unable to change identity [l:1281]
[Feb 08 12:17:06]    emerg: Cannot continue after this [l:1283]

你能帮帮我吗？

再见

Answer 1

您以什么用户身份启动守护程序？如果它不是 root 那么这可能是你的答案:

选项“appRunAsUID”和“appRunAsGID”设置用户认为守护进程应该切换到子(守护进程)进程中使用。它需要以用户“root”身份启动，以便能够正确访问 pid 文件。

因此，您应该将“appRunAsUID”和“appRunAsGID”设置为守护脚本将运行的非特权用户，但您需要以“root”身份启动进程才能写入 pid 和切换用户。