/etc/network/if-up.d/postfix is in postfix 3.1.0-3.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 | #!/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 $(postconf -h queue_directory)$f 2>/dev/null; then
exit 0
fi
if [ -n "$RUNNING" ]; then
/etc/init.d/postfix reload >/dev/null 2>&1
fi
fi
# If master is running, force a queue run to unload any mail that is
# hanging around. Yes, sendmail is a symlink...
if [ -n "$RUNNING" ]; then
if [ -x /usr/sbin/sendmail ]; then
/usr/sbin/sendmail -q >/dev/null 2>&1
fi
fi
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