freebsd-dev/sbin/init/rc

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#!/bin/sh
#
# Copyright (c) 2000-2004 The FreeBSD Project
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# @(#)rc 5.27 (Berkeley) 6/5/91
1999-08-27 23:37:10 +00:00
# $FreeBSD$
#
# System startup script run by init on autoboot
# or after single-user.
# Output and error are redirected to console by init,
# and the console is the controlling terminal.
# Note that almost all of the user-configurable behavior is no longer in
# this file, but rather in /etc/defaults/rc.conf. Please check that file
# first before contemplating any changes here. If you do need to change
# this file for some reason, we would like to know about it.
stty status '^T' 2> /dev/null
# Set shell to ignore SIGINT (2), but not children;
# shell catches SIGQUIT (3) and returns to single user.
#
trap : 2
trap "echo 'Boot interrupted'; exit 1" 3
HOME=/
PATH=/sbin:/bin:/usr/sbin:/usr/bin
export HOME PATH
if [ "$1" = autoboot ]; then
autoboot=yes
_boot="faststart"
rc_fast=yes # run_rc_command(): do fast booting
else
autoboot=no
_boot="quietstart"
fi
dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null`
if [ ${dlv:=0} -ne 0 -o -f /etc/diskless ]; then
sh /etc/rc.initdiskless
fi
# Run these after determining whether we are booting diskless in order
# to minimize the number of files that are needed on a diskless system,
# and to make the configuration file variables available to rc itself.
#
. /etc/rc.subr
load_rc_config
# If we receive a SIGALRM, re-source /etc/rc.conf; this allows rc.d
# scripts to perform "boot-time configuration" including enabling and
# disabling rc.d scripts which appear later in the boot order.
trap "_rc_conf_loaded=false; load_rc_config" ALRM
skip="-s nostart"
if [ `/sbin/sysctl -n security.jail.jailed` -eq 1 ]; then
skip="$skip -s nojail"
if [ `/sbin/sysctl -n security.jail.vnet` -ne 1 ]; then
skip="$skip -s nojailvnet"
fi
fi
# If the firstboot sentinel doesn't exist, we want to skip firstboot scripts.
if ! [ -e ${firstboot_sentinel} ]; then
skip_firstboot="-s firstboot"
fi
# Do a first pass to get everything up to $early_late_divider so that
# we can do a second pass that includes $local_startup directories
#
files=`rcorder ${skip} ${skip_firstboot} /etc/rc.d/* 2>/dev/null`
_rc_elem_done=' '
for _rc_elem in ${files}; do
run_rc_script ${_rc_elem} ${_boot}
_rc_elem_done="${_rc_elem_done}${_rc_elem} "
case "$_rc_elem" in
*/${early_late_divider}) break ;;
esac
done
unset files local_rc
# Now that disks are mounted, for each dir in $local_startup
# search for init scripts that use the new rc.d semantics.
#
case ${local_startup} in
[Nn][Oo] | '') ;;
*) find_local_scripts_new ;;
esac
# The firstboot sentinel might be on a newly mounted filesystem; look for it
# again and unset skip_firstboot if we find it.
if [ -e ${firstboot_sentinel} ]; then
skip_firstboot=""
fi
files=`rcorder ${skip} ${skip_firstboot} /etc/rc.d/* ${local_rc} 2>/dev/null`
for _rc_elem in ${files}; do
case "$_rc_elem_done" in
*" $_rc_elem "*) continue ;;
esac
run_rc_script ${_rc_elem} ${_boot}
done
Update the fsck command in /etc/rc to use the new background fsck checking. Applying these changes (typically via mergemaster) will cause your system to start running background checks on all your soft update enabled filesystems (provided that you have a kernel with the required functionality, e.g., one built since the end of April). Please report any and all problems to mckusick@mckusick.com (not mckusick@freebsd.org which I read infrequently). See the comment above the fsck command in /etc/rc for instructions on how to disable background checking should it cause you too much trouble. Several FAQs: 1) Can I reboot before the background checks are done? Ans) Yes, when the system restarts the checks will pick up where they left off. 2) Can a crash during checking corrupt my filesystem? Ans) No, recovered resources are returned to the system using soft updates which ensure that the freeing is done in a safe order. 3) How will I know if any background checks are being done? Ans) Filesystems that are to be checked in background will be listed as `DEFER FOR BACKGROUND CHECKING' at the usual fsck check time during system startup. 4) What happens to the output of the background checks? Ans) It is sent to syslog `daemon' facility log level `notice'. 5) When will this feature be available in the 4.X kernel? Ans) Never. It is much too radical and extensive a change to be MFC'ed. Besides, it needs many months of experience and tuning before it is ready for widespread use. 6) What happens if a background fsck fails (i.e., fsck finds errors that would normally require a manual fsck)? Ans) The filesystem will be marked as needing a manual fsck. At the next system reboot, the check will be done in foreground and the usual actions taken (usually a failure to go multi-user until fsck has been run by hand on the affected filesystem).
2001-05-11 07:40:39 +00:00
# Remove the firstboot sentinel, and reboot if it was requested.
# Be a bit paranoid about removing it to handle the common failure
# modes since the consequence of failure can be big.
# Note: this assumes firstboot_sentinel is on / when we have
# a read-only /, or that it is on media that's writable.
if [ -e ${firstboot_sentinel} ]; then
checkyesno root_rw_mount && mount -uw /
chflags -R 0 ${firstboot_sentinel}
rm -rf ${firstboot_sentinel}
if [ -e ${firstboot_sentinel}-reboot ]; then
chflags -R 0 ${firstboot_sentinel}-reboot
rm -rf ${firstboot_sentinel}-reboot
checkyesno root_rw_mount || mount -ur /
kill -INT 1
fi
checkyesno root_rw_mount || mount -ur /
fi
echo ''
date
exit 0