/etc/init.d/sendsigs is in initscripts 2.88dsf-59.
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 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 | #! /bin/sh
### BEGIN INIT INFO
# Provides: sendsigs
# Required-Start:
# Required-Stop: umountnfs
# Default-Start:
# Default-Stop: 0 6
# Short-Description: Kill all remaining processes.
# Description:
### END INIT INFO
PATH=/sbin:/usr/sbin:/bin:/usr/bin
. /lib/lsb/init-functions
# Make it possible to see who the misbehaving processes are
report_unkillable() {
if [ -x /usr/bin/pstree ] ; then
echo "Currently running processes (pstree):"
pstree
elif [ -x /bin/ps ] ; then
echo "Currently running processes (ps):"
ps -ef
fi
}
do_stop () {
OMITPIDS=
for omitfile in /run/sendsigs.omit; do
if [ -e $omitfile ]; then
for pid in $(cat $omitfile); do
OMITPIDS="${OMITPIDS:+$OMITPIDS }-o $pid"
done
fi
done
# Load sendsigs.omit.d/packagename files too, to make it
# possible for scripts that need to modify the list of pids at
# run time without race conditions.
for omitdir in /run/sendsigs.omit.d; do
if [ -d "${omitdir}" ]; then
for pidfile in "${omitdir}/"*; do
[ -f "$pidfile" ] || continue
for pid in $(cat $pidfile); do
OMITPIDS="${OMITPIDS:+$OMITPIDS }-o $pid"
done
done
fi
done
# Upstart jobs have their own "stop on" clauses that sends
# SIGTERM/SIGKILL just like this, so if they're still running,
# they're supposed to be
if [ -x /sbin/initctl ]; then
for pid in $(initctl list | sed -n -e "/process [0-9]/s/.*process //p"); do
OMITPIDS="${OMITPIDS:+$OMITPIDS }-o $pid"
done
fi
# Flush the kernel I/O buffer before we start to kill
# processes, to make sure the IO of already stopped services to
# not slow down the remaining processes to a point where they
# are accidentily killed with SIGKILL because they did not
# manage to shut down in time.
sync
# Kill all processes.
log_action_begin_msg "Asking all remaining processes to terminate"
killall5 -15 $OMITPIDS # SIGTERM
log_action_end_msg 0
alldead=""
for seq in 1 2 3 4 5 6 7 8 9 10; do
# use SIGCONT/signal 18 to check if there are
# processes left. No need to check the exit code
# value, because either killall5 work and it make
# sense to wait for processes to die, or it fail and
# there is nothing to wait for.
# did an upstart job start since we last polled initctl? check
# again on each loop and add any new jobs (e.g., plymouth) to
# the list. If we did miss one starting up, this beats waiting
# 10 seconds before shutting down.
if [ -x /sbin/initctl ]; then
for pid in $(initctl list | sed -n -e "/process [0-9]/s/.*process //p"); do
OMITPIDS="${OMITPIDS:+$OMITPIDS }-o $pid"
done
fi
if killall5 -18 $OMITPIDS ; then
:
else
alldead=1
break
fi
sleep 1
done
if [ -z "$alldead" ] ; then
report_unkillable
log_action_begin_msg "Killing all remaining processes"
killall5 -9 $OMITPIDS # SIGKILL
log_action_end_msg 1
else
log_action_begin_msg "All processes ended within $seq seconds"
log_action_end_msg 0
fi
}
case "$1" in
start|status)
# No-op
;;
restart|reload|force-reload)
echo "Error: argument '$1' not supported" >&2
exit 3
;;
stop)
do_stop
;;
*)
echo "Usage: $0 start|stop" >&2
exit 3
;;
esac
:
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