How to programmatically check if particular daemon is runnning by specifying its name on Linux using C, C++?

Question

如何通过在 Linux 上使用 C、C++ 指定其名称来以编程方式检查特定守护程序是否正在运行？

Answer 1

A simple command to run would be systemctl status ${service} | grep "Active:" | cut -d' ' -f6 systemctl status ${service} | grep "Active:" | cut -d' ' -f6 systemctl status ${service} | grep "Active:" | cut -d' ' -f6 . Capture the stdout of the above command and it should equal (running) .

On that note, *ctl are intended for command line use only and not for use by other programs. The accepted way is to interact with systemd using the dbus API.

https://www.freedesktop.org/wiki/Software/systemd/dbus/

Answer 2

As I cannot add comment above. you can use systemctl to check service status.

systemctl status servicename

This is terminal command. using system("systemctl status servicename") u can manage call from c++.

Hope this is what is were looking at or similar.

Answer 3

systemctl is-active ${service_name} 可用于检查服务是否处于活动状态