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freebsd/etc/rc.d/cleartmp
Yaroslav Tykhiy 7d0ed28d3b Improve cleartmp in a number of aspects:
+ Use rc.subr(8) features properly.
+ Do the whole job of obliterating /tmp contents in find(1).
+ Leave lost+found and quota.{user,group} in /tmp only if root-owned.
+ Make the overall structure clearer by first removing the X dirs
  (perhaps along with the rest of /tmp) and then re-creating them.
+ Use "find -exec rm -rf {} +" for efficiency: each rm instance gets
  a chance to kill as much files in /tmp as ARG_MAX permits.

PR:		bin/104044
Submitted by:	Andrey Simonenko <see PR for email>
Hacked by:	yar
MFC after:	1 month
2006-10-16 13:01:45 +00:00

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#!/bin/sh
#
# $FreeBSD$
#
# PROVIDE: cleartmp
# REQUIRE: mountcritremote tmp
# BEFORE: DAEMON
. /etc/rc.subr
name="cleartmp"
# Disguise rcvar for the start method to run irrespective of its setting.
rcvar1=`set_rcvar clear_tmp`
start_cmd="${name}_start"
stop_cmd=":"
cleartmp_start()
{
# Make /tmp location variable for easier debugging.
local tmp="/tmp"
# X related directories to create in /tmp.
local x11_socket_dirs="${tmp}/.X11-unix ${tmp}/.XIM-unix \
${tmp}/.ICE-unix ${tmp}/.font-unix"
if checkyesno ${rcvar1}; then
echo "Clearing ${tmp}."
# This is not needed for mfs, but doesn't hurt anything.
# Things to note:
# + The dot in ${tmp}/. is important.
# + Put -prune before -exec so find never descends
# into a directory that was already passed to rm -rf.
# + "--" in rm arguments isn't strictly necessary, but
# it can prevent foot-shooting in future.
# + /tmp/lost+found is preserved, but its contents are removed.
# + lost+found and quota.* in subdirectories are removed.
find -x ${tmp}/. ! -name . \
! \( -name lost+found -type d -user root \) \
! \( \( -name quota.user -or -name quota.group \) \
-type f -user root \) \
-prune -exec rm -rf -- {} +
elif checkyesno clear_tmp_X; then
# Remove X lock files, since they will prevent you from
# restarting X. Remove other X related directories.
echo "Clearing ${tmp} (X related)."
rm -rf ${tmp}/.X[0-9]-lock ${x11_socket_dirs}
fi
if checkyesno clear_tmp_X; then
# Create X related directories with proper permissions.
mkdir -m 1777 ${x11_socket_dirs}
fi
}
load_rc_config $name
run_rc_command "$1"