libsystemd

[Jonathan de Boyne Pollard <J.deBoynePollard-newsgroups@NTLWorld.com>]

Simon McVittie:

> You mean like libsystemd, which looks in /run to see whether systemd 
> is in use, talks to it if it is, and returns some suitable error code 
> (-ENOSYS?) if it isn't? :-)
Here's interesting for you. (-:

Here's libsystemd and Arturo Borrero Gonzalez's code that calls it.  
Please point to the line that checks in /run for systemd running.

* 
https://github.com/formorer/pkg-conntrack-tools/blob/1ed72f0e691bbd92a78a0a944a9c448260e6ff41/src/systemd.c#L30

* 
https://github.com/systemd/systemd/blob/master/src/libsystemd/sd-daemon/sd-daemon.c#L404