The xinetd server from previous versions of RedHat defined a REMOTE_IP
environment variable.
I realize that I can extract that data with the following code:
{
struct sockaddr_in thisconn;
int thislen = sizeof(thisconn);
getpeername( /* STDIN */ 0, &thisconn, &thislen);
printf("%s\n", inet_ntoa(thisconn.sin_addr));
}
...but it would be nice if the behavior matched xinetd.
The environment that I see defined by systemd is:
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin
PWD=/
LANG=en_US.utf8
SHLVL=1
_=/usr/bin/env
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