/etc/ppp/ip-up.d/postfix - Ubuntu 18.04 LTS (Bionic Beaver)

This is the default example configuration of postfix provided by Postfix. This config file was generated by Postfix running on Ubuntu 18.04.

It is located under: /etc/ppp/ip-up.d/postfix

    #!/bin/sh -e
# Called when a new interface comes up
# Written by LaMont Jones <lamont@debian.org>

# don't bother to restart postfix when lo is configured.
if [ "$IFACE" = "lo" ]; then
	exit 0
fi

# If /usr isn't mounted yet, silently bail.
if [ ! -d /usr/lib/postfix ]; then
	exit 0
fi

RUNNING=""
# If master is running, force a queue run to unload any mail that is
# hanging around.  Yes, sendmail is a symlink...
if [ -f /var/spool/postfix/pid/master.pid ]; then
	pid=$(sed 's/ //g' /var/spool/postfix/pid/master.pid)
	exe=$(ls -l /proc/$pid/exe 2>/dev/null | sed 's/.* //;s/.*\///')
	if [ "X$exe" = "Xmaster" ]; then
		RUNNING="y"
	fi
fi

# start or reload Postfix as needed
if [ ! -x /sbin/resolvconf ]; then
	f=/etc/resolv.conf
	if ! cp $f $(postconf -hx queue_directory)$f 2>/dev/null; then
		exit 0
	fi
	if [ -n "$RUNNING" ]; then
		service postfix reload >/dev/null 2>&1
	fi
fi

# If master is running, force a queue run to unload any mail that is
# hanging around.  Yes, sendmail is a symlink...
if [ -n "$RUNNING" ]; then
	if [ -x /usr/sbin/sendmail ]; then
		/usr/sbin/sendmail -q >/dev/null 2>&1
	fi
fi

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