[Cppcms-users] cppblog and systemd

[Paolo B. <pao...@gm...>]

I wanted to write a systemd file to execute cppblog, here is the content:

-------- >8
[Unit]
Description=A high performance blog based on cppcms
After=network.target

[Service]
Type=simple
WorkingDirectory=/var/blog
ExecStart=/usr/bin/cppblog -c config.js

[Install]
WantedBy=multi-user.target
-------- >8

As you can see it is very simple and apparently it works, however I
would like to execute cppblog as a http user, so I added User=http in
the [Service] section.

However just changing the executing user the cppblog crashes with a
"address already in use error," here is the log:
Failed: system: Address already in use
0x7f146c5f6ebb:
booster::system::system_error::system_error(booster::system::error_code
const&) + 0x13b in /usr/lib/libcppcms.so.1
0x7f146c2c7bb7: booster::aio::acceptor::bind(booster::aio::endpoint
const&) + 0x67 in /usr/lib/libbooster.so.0
0x7f146c6cfce0:
cppcms::impl::cgi::fastcgi_api_unix_socket_factory(cppcms::service&,
std::string, int) + 0xc0 in /usr/lib/libcppcms.so.1
0x7f146c5f0bac: cppcms::service::setup_acceptor(cppcms::json::value
const&, int, int) + 0x68c in /usr/lib/libcppcms.so.1
0x7f146c5f137e: cppcms::service::start_acceptor(bool) + 0x17e in
/usr/lib/libcppcms.so.1
0x7f146c5f3e19: cppcms::service::run() + 0x29 in /usr/lib/libcppcms.so.1
0x41d036: main + 0x76 in /usr/bin/cppblog
0x7f146b30e800: __libc_start_main + 0xf0 in /usr/lib/libc.so.6
0x41de39: _start + 0x29 in /usr/bin/cppblog

To make the situation even more confusing, if I try to execute via
command line with sudo -u it works fine...

What am I doing wrong? Any idea of what I can try?