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从后台进程启动后台进程

[英]Start background processes from a background process

原文 2013-01-27 10:30:37 6 2 php/ linux/ process/ background-process

I have a PHP script say test.php in linux Ubuntu, in this PHP script I use shell_exec() to start several background processes. 我在Linux Ubuntu中有一个PHP脚本说test.php ，在此PHP脚本中，我使用shell_exec()启动了几个后台进程。

When I execute php test.php , the background processes are started as expected, but when I run php test.php & , those several background processes are not started. 当我执行php test.php ，后台进程将按预期方式启动，但是当我运行php test.php & ，则不会启动这几个后台进程。

Is it not a supported way to start background processes from a background process, or is there a better to go about this? 从后台进程启动后台进程不是受支持的方法，还是有更好的方法呢？

2 个解决方案

Try php test.php < /dev/null & - some Unix distributions seem to expect some input and send the process idle to background. 尝试php test.php < /dev/null & -一些Unix发行版似乎期望一些输入并将进程空闲发送到后台。 Tested on Fedora Linux (bash) you can start php test.php & but it isn't executed. 在Fedora Linux（bash）上经过测试，您可以启动php test.php & ，但未执行。 Check with jobs running background process - catch from background and execute with fg . 检查运行后台进程的jobs -从后台捕获并使用fg执行。

It's possible by using proc_open . 使用proc_open是可能的。 I've written a micro-framework as POC, which is using this technique. 我已经使用该技术编写了一个微框架，称为POC。