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freebsd/etc/rc.subr

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# $NetBSD: rc.subr,v 1.67 2006/10/07 11:25:15 elad Exp $
# $FreeBSD$
#
# Copyright (c) 1997-2004 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Luke Mewburn.
#
# 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.
# 3. All advertising materials mentioning features or use of this software
# must display the following acknowledgement:
# This product includes software developed by the NetBSD
# Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation nor the names of its
# contributors may be used to endorse or promote products derived
# from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.subr
# functions used by various rc scripts
#
: ${rcvar_manpage:='rc.conf(5)'}
: ${RC_PID:=$$}; export RC_PID
#
# Operating System dependent/independent variables
#
if [ -z "${_rc_subr_loaded}" ]; then
_rc_subr_loaded="YES"
SYSCTL="/sbin/sysctl"
SYSCTL_N="${SYSCTL} -n"
CMD_OSTYPE="${SYSCTL_N} kern.ostype"
OSTYPE=`${CMD_OSTYPE}`
ID="/usr/bin/id"
IDCMD="if [ -x $ID ]; then $ID -un; fi"
PS="/bin/ps -ww"
JID=`$PS -p $$ -o jid=`
case ${OSTYPE} in
FreeBSD)
SYSCTL_W="${SYSCTL}"
;;
NetBSD)
SYSCTL_W="${SYSCTL} -w"
;;
esac
#
# functions
# ---------
#
# set_rcvar base_var
# Set the variable name enabling a specific service.
# FreeBSD uses ${service}_enable, while NetBSD uses
# just the name of the service. For example:
# FreeBSD: sendmail_enable="YES"
# NetBSD : sendmail="YES"
# $1 - if $name is not the base to work of off, specify
# a different one
#
set_rcvar()
{
if [ -z "$1" ]; then
base_var=${name}
else
base_var="$1"
fi
case ${OSTYPE} in
FreeBSD)
echo ${base_var}_enable
;;
NetBSD)
echo ${base_var}
;;
*)
echo 'XXX'
;;
esac
}
#
# force_depend script
# Force a service to start. Intended for use by services
# to resolve dependency issues. It is assumed the caller
# has check to make sure this call is necessary
# $1 - filename of script, in /etc/rc.d, to run
#
force_depend()
{
_depend="$1"
info "${name} depends on ${_depend}, which will be forced to start."
if ! /etc/rc.d/${_depend} forcestart; then
warn "Unable to force ${_depend}. It may already be running."
return 1
fi
return 0
}
#
# checkyesno var
# Test $1 variable, and warn if not set to YES or NO.
# Return 0 if it's "yes" (et al), nonzero otherwise.
#
checkyesno()
{
eval _value=\$${1}
debug "checkyesno: $1 is set to $_value."
case $_value in
# "yes", "true", "on", or "1"
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
return 0
;;
# "no", "false", "off", or "0"
[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
return 1
;;
*)
warn "\$${1} is not set properly - see ${rcvar_manpage}."
return 1
;;
esac
}
#
# reverse_list list
# print the list in reverse order
#
reverse_list()
{
_revlist=
for _revfile; do
_revlist="$_revfile $_revlist"
done
echo $_revlist
}
# stop_boot always
# If booting directly to multiuser or $always is enabled,
# send SIGTERM to the parent (/etc/rc) to abort the boot.
# Otherwise just exit.
#
stop_boot()
{
local always
case $1 in
# "yes", "true", "on", or "1"
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
always=true
;;
*)
always=false
;;
esac
if [ "$autoboot" = yes -o "$always" = true ]; then
echo "ERROR: ABORTING BOOT (sending SIGTERM to parent)!"
kill -TERM ${RC_PID}
fi
exit 1
}
#
# mount_critical_filesystems type
# Go through the list of critical filesystems as provided in
# the rc.conf(5) variable $critical_filesystems_${type}, checking
# each one to see if it is mounted, and if it is not, mounting it.
#
mount_critical_filesystems()
{
eval _fslist=\$critical_filesystems_${1}
for _fs in $_fslist; do
mount | (
_ismounted=false
while read what _on on _type type; do
if [ $on = $_fs ]; then
_ismounted=true
fi
done
if $_ismounted; then
:
else
mount $_fs >/dev/null 2>&1
fi
)
done
}
#
# check_pidfile pidfile procname [interpreter]
# Parses the first line of pidfile for a PID, and ensures
# that the process is running and matches procname.
# Prints the matching PID upon success, nothing otherwise.
# interpreter is optional; see _find_processes() for details.
#
check_pidfile()
{
_pidfile=$1
_procname=$2
_interpreter=$3
if [ -z "$_pidfile" -o -z "$_procname" ]; then
err 3 'USAGE: check_pidfile pidfile procname [interpreter]'
fi
if [ ! -f $_pidfile ]; then
debug "pid file ($_pidfile): not readable."
return
fi
read _pid _junk < $_pidfile
if [ -z "$_pid" ]; then
debug "pid file ($_pidfile): no pid in file."
return
fi
_find_processes $_procname ${_interpreter:-.} '-p '"$_pid"
}
#
# check_process procname [interpreter]
# Ensures that a process (or processes) named procname is running.
# Prints a list of matching PIDs.
# interpreter is optional; see _find_processes() for details.
#
check_process()
{
_procname=$1
_interpreter=$2
if [ -z "$_procname" ]; then
err 3 'USAGE: check_process procname [interpreter]'
fi
_find_processes $_procname ${_interpreter:-.} '-ax'
}
#
# _find_processes procname interpreter psargs
# Search for procname in the output of ps generated by psargs.
# Prints the PIDs of any matching processes, space separated.
#
# If interpreter == ".", check the following variations of procname
# against the first word of each command:
# procname
# `basename procname`
# `basename procname` + ":"
# "(" + `basename procname` + ")"
# "[" + `basename procname` + "]"
#
# If interpreter != ".", read the first line of procname, remove the
# leading #!, normalise whitespace, append procname, and attempt to
# match that against each command, either as is, or with extra words
# at the end. As an alternative, to deal with interpreted daemons
# using perl, the basename of the interpreter plus a colon is also
# tried as the prefix to procname.
#
_find_processes()
{
if [ $# -ne 3 ]; then
err 3 'USAGE: _find_processes procname interpreter psargs'
fi
_procname=$1
_interpreter=$2
_psargs=$3
_pref=
if [ $_interpreter != "." ]; then # an interpreted script
_script=${_chroot}${_chroot:+"/"}$_procname
if [ -r $_script ]; then
read _interp < $_script # read interpreter name
case "$_interp" in
\#!*)
_interp=${_interp#\#!} # strip #!
set -- $_interp
case $1 in
*/bin/env)
shift # drop env to get real name
;;
esac
if [ $_interpreter != $1 ]; then
warn "\$command_interpreter $_interpreter != $1"
fi
;;
*)
warn "no shebang line in $_script"
set -- $_interpreter
;;
esac
else
warn "cannot read shebang line from $_script"
set -- $_interpreter
fi
_interp="$* $_procname" # cleanup spaces, add _procname
_interpbn=${1##*/}
_fp_args='_argv'
_fp_match='case "$_argv" in
${_interp}|"${_interp} "*|"${_interpbn}: ${_procname}"*)'
else # a normal daemon
_procnamebn=${_procname##*/}
_fp_args='_arg0 _argv'
_fp_match='case "$_arg0" in
$_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})"|"[${_procnamebn}]")'
fi
_proccheck="\
$PS 2>/dev/null -o pid= -o jid= -o command= $_psargs"' |
while read _npid _jid '"$_fp_args"'; do
'"$_fp_match"'
if [ "$JID" -eq "$_jid" ];
then echo -n "$_pref$_npid";
_pref=" ";
fi
;;
esac
done'
# debug "in _find_processes: proccheck is ($_proccheck)."
eval $_proccheck
}
#
# wait_for_pids pid [pid ...]
# spins until none of the pids exist
#
wait_for_pids()
{
_list="$@"
if [ -z "$_list" ]; then
return
fi
_prefix=
while true; do
_nlist="";
for _j in $_list; do
if kill -0 $_j 2>/dev/null; then
_nlist="${_nlist}${_nlist:+ }$_j"
fi
done
if [ -z "$_nlist" ]; then
break
fi
_list=$_nlist
echo -n ${_prefix:-"Waiting for PIDS: "}$_list
_prefix=", "
sleep 2
done
if [ -n "$_prefix" ]; then
echo "."
fi
}
#
# run_rc_command argument
# Search for argument in the list of supported commands, which is:
# "start stop restart rcvar status poll ${extra_commands}"
# If there's a match, run ${argument}_cmd or the default method
# (see below).
#
# If argument has a given prefix, then change the operation as follows:
# Prefix Operation
# ------ ---------
# fast Skip the pid check, and set rc_fast=yes, rc_quiet=yes
# force Set ${rcvar} to YES, and set rc_force=yes
# one Set ${rcvar} to YES
# quiet Don't output some diagnostics, and set rc_quiet=yes
#
# The following globals are used:
#
# Name Needed Purpose
# ---- ------ -------
# name y Name of script.
#
# command n Full path to command.
# Not needed if ${rc_arg}_cmd is set for
# each keyword.
#
# command_args n Optional args/shell directives for command.
#
# command_interpreter n If not empty, command is interpreted, so
# call check_{pidfile,process}() appropriately.
#
# extra_commands n List of extra commands supported.
#
# pidfile n If set, use check_pidfile $pidfile $command,
# otherwise use check_process $command.
# In either case, only check if $command is set.
#
# procname n Process name to check for instead of $command.
#
# rcvar n This is checked with checkyesno to determine
# if the action should be run.
#
# ${name}_program n Full path to command.
# Meant to be used in /etc/rc.conf to override
# ${command}.
#
# ${name}_chroot n Directory to chroot to before running ${command}
# Requires /usr to be mounted.
#
# ${name}_chdir n Directory to cd to before running ${command}
# (if not using ${name}_chroot).
#
# ${name}_flags n Arguments to call ${command} with.
# NOTE: $flags from the parent environment
# can be used to override this.
#
# ${name}_nice n Nice level to run ${command} at.
#
# ${name}_user n User to run ${command} as, using su(1) if not
# using ${name}_chroot.
# Requires /usr to be mounted.
#
# ${name}_group n Group to run chrooted ${command} as.
# Requires /usr to be mounted.
#
# ${name}_groups n Comma separated list of supplementary groups
# to run the chrooted ${command} with.
# Requires /usr to be mounted.
#
# ${rc_arg}_cmd n If set, use this as the method when invoked;
# Otherwise, use default command (see below)
#
# ${rc_arg}_precmd n If set, run just before performing the
# ${rc_arg}_cmd method in the default
# operation (i.e, after checking for required
# bits and process (non)existence).
# If this completes with a non-zero exit code,
# don't run ${rc_arg}_cmd.
#
# ${rc_arg}_postcmd n If set, run just after performing the
# ${rc_arg}_cmd method, if that method
# returned a zero exit code.
#
# required_dirs n If set, check for the existence of the given
# directories before running a (re)start command.
#
# required_files n If set, check for the readability of the given
# files before running a (re)start command.
#
# required_modules n If set, ensure the given kernel modules are
# loaded before running a (re)start command.
# The check and possible loads are actually
# done after start_precmd so that the modules
# aren't loaded in vain, should the precmd
# return a non-zero status to indicate a error.
# If a word in the list looks like "foo:bar",
# "foo" is the KLD file name and "bar" is the
# module name. If a word looks like "foo~bar",
# "foo" is the KLD file name and "bar" is a
# egrep(1) pattern matching the module name.
# Otherwise the module name is assumed to be
# the same as the KLD file name, which is most
# common. See load_kld().
#
# required_vars n If set, perform checkyesno on each of the
# listed variables before running the default
# (re)start command.
#
# Default behaviour for a given argument, if no override method is
# provided:
#
# Argument Default behaviour
# -------- -----------------
# start if !running && checkyesno ${rcvar}
# ${command}
#
# stop if ${pidfile}
# rc_pid=$(check_pidfile $pidfile $command)
# else
# rc_pid=$(check_process $command)
# kill $sig_stop $rc_pid
# wait_for_pids $rc_pid
# ($sig_stop defaults to TERM.)
#
# reload Similar to stop, except use $sig_reload instead,
# and doesn't wait_for_pids.
# $sig_reload defaults to HUP.
# Note that `reload' isn't provided by default,
# it should be enabled via $extra_commands.
#
# restart Run `stop' then `start'.
#
# status Show if ${command} is running, etc.
#
# poll Wait for ${command} to exit.
#
# rcvar Display what rc.conf variable is used (if any).
#
# Variables available to methods, and after run_rc_command() has
# completed:
#
# Variable Purpose
# -------- -------
# rc_arg Argument to command, after fast/force/one processing
# performed
#
# rc_flags Flags to start the default command with.
# Defaults to ${name}_flags, unless overridden
# by $flags from the environment.
# This variable may be changed by the precmd method.
#
# rc_pid PID of command (if appropriate)
#
# rc_fast Not empty if "fast" was provided (q.v.)
#
# rc_force Not empty if "force" was provided (q.v.)
#
# rc_quiet Not empty if "quiet" was provided
#
#
run_rc_command()
{
_return=0
rc_arg=$1
if [ -z "$name" ]; then
err 3 'run_rc_command: $name is not set.'
fi
# Don't repeat the first argument when passing additional command-
# line arguments to the command subroutines.
#
shift 1
rc_extra_args="$*"
_rc_prefix=
case "$rc_arg" in
fast*) # "fast" prefix; don't check pid
rc_arg=${rc_arg#fast}
rc_fast=yes
rc_quiet=yes
;;
force*) # "force prefix; always run
rc_force=yes
_rc_prefix=force
rc_arg=${rc_arg#${_rc_prefix}}
if [ -n "${rcvar}" ]; then
eval ${rcvar}=YES
fi
;;
one*) # "one" prefix; set ${rcvar}=yes
_rc_prefix=one
rc_arg=${rc_arg#${_rc_prefix}}
if [ -n "${rcvar}" ]; then
eval ${rcvar}=YES
fi
;;
quiet*) # "quiet" prefix; omit some messages
_rc_prefix=quiet
rc_arg=${rc_arg#${_rc_prefix}}
rc_quiet=yes
;;
esac
eval _override_command=\$${name}_program
command=${command:+${_override_command:-$command}}
_keywords="start stop restart rcvar $extra_commands"
rc_pid=
_pidcmd=
_procname=${procname:-${command}}
# setup pid check command
if [ -n "$_procname" ]; then
if [ -n "$pidfile" ]; then
_pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')'
else
_pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')'
fi
if [ -n "$_pidcmd" ]; then
_keywords="${_keywords} status poll"
fi
fi
if [ -z "$rc_arg" ]; then
rc_usage $_keywords
fi
if [ -n "$flags" ]; then # allow override from environment
rc_flags=$flags
else
eval rc_flags=\$${name}_flags
fi
eval _chdir=\$${name}_chdir _chroot=\$${name}_chroot \
_nice=\$${name}_nice _user=\$${name}_user \
_group=\$${name}_group _groups=\$${name}_groups
if [ -n "$_user" ]; then # unset $_user if running as that user
if [ "$_user" = "$(eval $IDCMD)" ]; then
unset _user
fi
fi
eval $_pidcmd # determine the pid if necessary
for _elem in $_keywords; do
if [ "$_elem" != "$rc_arg" ]; then
continue
fi
# if ${rcvar} is set, and $1 is not
# "rcvar", then run
# checkyesno ${rcvar}
# and return if that failed
#
if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then
if ! checkyesno ${rcvar}; then
if [ -n "${rc_quiet}" ]; then
return 0
fi
echo -n "Cannot '${rc_arg}' $name. Set ${rcvar} to "
echo -n "YES in /etc/rc.conf or use 'one${rc_arg}' "
echo "instead of '${rc_arg}'."
return 0
fi
fi
# if there's a custom ${XXX_cmd},
# run that instead of the default
#
eval _cmd=\$${rc_arg}_cmd \
_precmd=\$${rc_arg}_precmd \
_postcmd=\$${rc_arg}_postcmd
if [ -n "$_cmd" ]; then
_run_rc_precmd || return 1
_run_rc_doit "$_cmd $rc_extra_args" || return 1
_run_rc_postcmd
return $_return
fi
case "$rc_arg" in # default operations...
status)
_run_rc_precmd || return 1
if [ -n "$rc_pid" ]; then
echo "${name} is running as pid $rc_pid."
else
echo "${name} is not running."
return 1
fi
_run_rc_postcmd
;;
start)
if [ -z "$rc_fast" -a -n "$rc_pid" ]; then
echo 1>&2 "${name} already running? (pid=$rc_pid)."
return 1
fi
if [ ! -x ${_chroot}${_chroot:+"/"}${command} ]; then
warn "run_rc_command: cannot run $command"
return 1
fi
if ! _run_rc_precmd; then
warn "failed precmd routine for ${name}"
return 1
fi
# setup the full command to run
#
[ -z "${rc_quiet}" ] && echo "Starting ${name}."
if [ -n "$_chroot" ]; then
_doit="\
${_nice:+nice -n $_nice }\
chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
$_chroot $command $rc_flags $command_args"
else
_doit="\
${_chdir:+cd $_chdir && }\
$command $rc_flags $command_args"
if [ -n "$_user" ]; then
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
fi
if [ -n "$_nice" ]; then
if [ -z "$_user" ]; then
_doit="sh -c \"$_doit\""
fi
_doit="nice -n $_nice $_doit"
fi
fi
# run the full command
#
if ! _run_rc_doit "$_doit"; then
warn "failed to start ${name}"
return 1
fi
# finally, run postcmd
#
_run_rc_postcmd
;;
stop)
if [ -z "$rc_pid" ]; then
[ -n "$rc_fast" ] && return 0
_run_rc_notrunning
return 1
fi
_run_rc_precmd || return 1
# send the signal to stop
#
echo "Stopping ${name}."
_doit=$(_run_rc_killcmd "${sig_stop:-TERM}")
_run_rc_doit "$_doit" || return 1
# wait for the command to exit,
# and run postcmd.
wait_for_pids $rc_pid
_run_rc_postcmd
;;
reload)
if [ -z "$rc_pid" ]; then
_run_rc_notrunning
return 1
fi
_run_rc_precmd || return 1
_doit=$(_run_rc_killcmd "${sig_reload:-HUP}")
_run_rc_doit "$_doit" || return 1
_run_rc_postcmd
;;
restart)
# prevent restart being called more
# than once by any given script
#
if ${_rc_restart_done:-false}; then
return 0
fi
_rc_restart_done=true
_run_rc_precmd || return 1
# run those in a subshell to keep global variables
( run_rc_command ${_rc_prefix}stop $rc_extra_args )
( run_rc_command ${_rc_prefix}start $rc_extra_args )
_return=$?
[ $_return -ne 0 ] && [ -z "$rc_force" ] && return 1
_run_rc_postcmd
;;
poll)
_run_rc_precmd || return 1
if [ -n "$rc_pid" ]; then
wait_for_pids $rc_pid
fi
_run_rc_postcmd
;;
rcvar)
echo "# $name"
if [ -n "$rcvar" ]; then
if checkyesno ${rcvar}; then
echo "${rcvar}=YES"
else
echo "${rcvar}=NO"
fi
fi
;;
*)
rc_usage $_keywords
;;
esac
return $_return
done
echo 1>&2 "$0: unknown directive '$rc_arg'."
rc_usage $_keywords
# not reached
}
#
# Helper functions for run_rc_command: common code.
# They use such global variables besides the exported rc_* ones:
#
# name R/W
# ------------------
# _precmd R
# _postcmd R
# _return W
#
_run_rc_precmd()
{
check_required_before "$rc_arg" || return 1
if [ -n "$_precmd" ]; then
debug "run_rc_command: ${rc_arg}_precmd: $_precmd $rc_extra_args"
eval "$_precmd $rc_extra_args"
_return=$?
# If precmd failed and force isn't set, request exit.
if [ $_return -ne 0 ] && [ -z "$rc_force" ]; then
return 1
fi
fi
check_required_after "$rc_arg" || return 1
return 0
}
_run_rc_postcmd()
{
if [ -n "$_postcmd" ]; then
debug "run_rc_command: ${rc_arg}_postcmd: $_postcmd $rc_extra_args"
eval "$_postcmd $rc_extra_args"
_return=$?
fi
return 0
}
_run_rc_doit()
{
debug "run_rc_command: doit: $*"
eval "$@"
_return=$?
# If command failed and force isn't set, request exit.
if [ $_return -ne 0 ] && [ -z "$rc_force" ]; then
return 1
fi
return 0
}
_run_rc_notrunning()
{
local _pidmsg
if [ -n "$pidfile" ]; then
_pidmsg=" (check $pidfile)."
else
_pidmsg=
fi
echo 1>&2 "${name} not running?${_pidmsg}"
}
_run_rc_killcmd()
{
local _cmd
_cmd="kill -$1 $rc_pid"
if [ -n "$_user" ]; then
_cmd="su -m ${_user} -c 'sh -c \"${_cmd}\"'"
fi
echo "$_cmd"
}
#
# run_rc_script file arg
# Start the script `file' with `arg', and correctly handle the
# return value from the script. If `file' ends with `.sh', it's
# sourced into the current environment. If `file' appears to be
# a backup or scratch file, ignore it. Otherwise if it's
# executable run as a child process.
#
run_rc_script()
{
_file=$1
_arg=$2
if [ -z "$_file" -o -z "$_arg" ]; then
err 3 'USAGE: run_rc_script file arg'
fi
unset name command command_args command_interpreter \
extra_commands pidfile procname \
rcvar required_dirs required_files required_vars
eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd
case "$_file" in
/etc/rc.d/*.sh) # run in current shell
set $_arg; . $_file
;;
*[~#]|*.OLD|*.bak|*.orig|*,v) # scratch file; skip
warn "Ignoring scratch file $_file"
;;
*) # run in subshell
if [ -x $_file ]; then
if [ -n "$rc_fast_and_loose" ]; then
set $_arg; . $_file
else
( trap "echo Script $_file interrupted; kill -QUIT $$" 3
trap "echo Script $_file interrupted; exit 1" 2
trap "echo Script $_file running" 29
set $_arg; . $_file )
fi
fi
;;
esac
}
#
# load_rc_config name
# Source in the configuration file for a given name.
#
load_rc_config()
{
_name=$1
if [ -z "$_name" ]; then
err 3 'USAGE: load_rc_config name'
fi
if ${_rc_conf_loaded:-false}; then
:
else
if [ -r /etc/defaults/rc.conf ]; then
debug "Sourcing /etc/defaults/rc.conf"
. /etc/defaults/rc.conf
source_rc_confs
elif [ -r /etc/rc.conf ]; then
debug "Sourcing /etc/rc.conf (/etc/defaults/rc.conf doesn't exist)."
. /etc/rc.conf
fi
_rc_conf_loaded=true
fi
if [ -f /etc/rc.conf.d/"$_name" ]; then
debug "Sourcing /etc/rc.conf.d/${_name}"
. /etc/rc.conf.d/"$_name"
fi
# Old variable names support
#
[ -n "$enable_quotas" ] && quota_enable="$enable_quotas"
}
#
# load_rc_config_var name var
# Read the rc.conf(5) var for name and set in the
# current shell, using load_rc_config in a subshell to prevent
# unwanted side effects from other variable assignments.
#
load_rc_config_var()
{
if [ $# -ne 2 ]; then
err 3 'USAGE: load_rc_config_var name var'
fi
eval $(eval '(
load_rc_config '$1' >/dev/null;
if [ -n "${'$2'}" -o "${'$2'-UNSET}" != "UNSET" ]; then
echo '$2'=\'\''${'$2'}\'\'';
fi
)' )
}
#
# rc_usage commands
# Print a usage string for $0, with `commands' being a list of
# valid commands.
#
rc_usage()
{
echo -n 1>&2 "Usage: $0 [fast|force|one]("
_sep=
for _elem; do
echo -n 1>&2 "$_sep$_elem"
_sep="|"
done
echo 1>&2 ")"
exit 1
}
#
# err exitval message
# Display message to stderr and log to the syslog, and exit with exitval.
#
err()
{
exitval=$1
shift
if [ -x /usr/bin/logger ]; then
logger "$0: ERROR: $*"
fi
echo 1>&2 "$0: ERROR: $*"
exit $exitval
}
#
# warn message
# Display message to stderr and log to the syslog.
#
warn()
{
if [ -x /usr/bin/logger ]; then
logger "$0: WARNING: $*"
fi
echo 1>&2 "$0: WARNING: $*"
}
#
# info message
# Display informational message to stdout and log to syslog.
#
info()
{
case ${rc_info} in
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
if [ -x /usr/bin/logger ]; then
logger "$0: INFO: $*"
fi
echo "$0: INFO: $*"
;;
esac
}
#
# debug message
# If debugging is enabled in rc.conf output message to stderr.
# BEWARE that you don't call any subroutine that itself calls this
# function.
#
debug()
{
case ${rc_debug} in
[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
if [ -x /usr/bin/logger ]; then
logger "$0: DEBUG: $*"
fi
echo 1>&2 "$0: DEBUG: $*"
;;
esac
}
#
# backup_file action file cur backup
# Make a backup copy of `file' into `cur', and save the previous
# version of `cur' as `backup' or use rcs for archiving.
#
# This routine checks the value of the backup_uses_rcs variable,
# which can be either YES or NO.
#
# The `action' keyword can be one of the following:
#
# add `file' is now being backed up (and is possibly
# being reentered into the backups system). `cur'
# is created and RCS files, if necessary, are
# created as well.
#
# update `file' has changed and needs to be backed up.
# If `cur' exists, it is copied to to `back' or
# checked into RCS (if the repository file is old),
# and then `file' is copied to `cur'. Another RCS
# check in done here if RCS is being used.
#
# remove `file' is no longer being tracked by the backups
# system. If RCS is not being used, `cur' is moved
# to `back', otherwise an empty file is checked in,
# and then `cur' is removed.
#
#
backup_file()
{
_action=$1
_file=$2
_cur=$3
_back=$4
if checkyesno backup_uses_rcs; then
_msg0="backup archive"
_msg1="update"
# ensure that history file is not locked
if [ -f $_cur,v ]; then
rcs -q -u -U -M $_cur
fi
# ensure after switching to rcs that the
# current backup is not lost
if [ -f $_cur ]; then
# no archive, or current newer than archive
if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
rcs -q -kb -U $_cur
co -q -f -u $_cur
fi
fi
case $_action in
add|update)
cp -p $_file $_cur
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
rcs -q -kb -U $_cur
co -q -f -u $_cur
chown root:wheel $_cur $_cur,v
;;
remove)
cp /dev/null $_cur
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
rcs -q -kb -U $_cur
chown root:wheel $_cur $_cur,v
rm $_cur
;;
esac
else
case $_action in
add|update)
if [ -f $_cur ]; then
cp -p $_cur $_back
fi
cp -p $_file $_cur
chown root:wheel $_cur
;;
remove)
mv -f $_cur $_back
;;
esac
fi
}
# make_symlink src link
# Make a symbolic link 'link' to src from basedir. If the
# directory in which link is to be created does not exist
# a warning will be displayed and an error will be returned.
# Returns 0 on sucess, 1 otherwise.
#
make_symlink()
{
local src link linkdir _me
src="$1"
link="$2"
linkdir="`dirname $link`"
_me="make_symlink()"
if [ -z "$src" -o -z "$link" ]; then
warn "$_me: requires two arguments."
return 1
fi
if [ ! -d "$linkdir" ]; then
warn "$_me: the directory $linkdir does not exist."
return 1
fi
if ! ln -sf $src $link; then
warn "$_me: unable to make a symbolic link from $link to $src"
return 1
fi
return 0
}
# devfs_rulesets_from_file file
# Reads a set of devfs commands from file, and creates
# the specified rulesets with their rules. Returns non-zero
# if there was an error.
#
devfs_rulesets_from_file()
{
local file _err _me
file="$1"
_me="devfs_rulesets_from_file"
_err=0
if [ -z "$file" ]; then
warn "$_me: you must specify a file"
return 1
fi
if [ ! -e "$file" ]; then
debug "$_me: no such file ($file)"
return 0
fi
debug "reading rulesets from file ($file)"
{ while read line
do
case $line in
\#*)
continue
;;
\[*\]*)
rulenum=`expr "$line" : "\[.*=\([0-9]*\)\]"`
if [ -z "$rulenum" ]; then
warn "$_me: cannot extract rule number ($line)"
_err=1
break
fi
rulename=`expr "$line" : "\[\(.*\)=[0-9]*\]"`
if [ -z "$rulename" ]; then
warn "$_me: cannot extract rule name ($line)"
_err=1
break;
fi
eval $rulename=\$rulenum
debug "found ruleset: $rulename=$rulenum"
if ! /sbin/devfs rule -s $rulenum delset; then
_err=1
break
fi
;;
*)
rulecmd="${line%%"\#*"}"
# evaluate the command incase it includes
# other rules
if [ -n "$rulecmd" ]; then
debug "adding rule ($rulecmd)"
if ! eval /sbin/devfs rule -s $rulenum $rulecmd
then
_err=1
break
fi
fi
;;
esac
if [ $_err -ne 0 ]; then
debug "error in $_me"
break
fi
done } < $file
return $_err
}
# devfs_init_rulesets
# Initializes rulesets from configuration files. Returns
# non-zero if there was an error.
#
devfs_init_rulesets()
{
local file _me
_me="devfs_init_rulesets"
# Go through this only once
if [ -n "$devfs_rulesets_init" ]; then
debug "$_me: devfs rulesets already initialized"
return
fi
for file in $devfs_rulesets; do
devfs_rulesets_from_file $file || return 1
done
devfs_rulesets_init=1
debug "$_me: devfs rulesets initialized"
return 0
}
# devfs_set_ruleset ruleset [dir]
# Sets the default ruleset of dir to ruleset. The ruleset argument
# must be a ruleset name as specified in devfs.rules(5) file.
# Returns non-zero if it could not set it successfully.
#
devfs_set_ruleset()
{
local devdir rs _me
[ -n "$1" ] && eval rs=\$$1 || rs=
[ -n "$2" ] && devdir="-m "$2"" || devdir=
_me="devfs_set_ruleset"
if [ -z "$rs" ]; then
warn "$_me: you must specify a ruleset number"
return 1
fi
debug "$_me: setting ruleset ($rs) on mount-point (${devdir#-m })"
if ! /sbin/devfs $devdir ruleset $rs; then
warn "$_me: unable to set ruleset $rs to ${devdir#-m }"
return 1
fi
return 0
}
# devfs_apply_ruleset ruleset [dir]
# Apply ruleset number $ruleset to the devfs mountpoint $dir.
# The ruleset argument must be a ruleset name as specified
# in a devfs.rules(5) file. Returns 0 on success or non-zero
# if it could not apply the ruleset.
#
devfs_apply_ruleset()
{
local devdir rs _me
[ -n "$1" ] && eval rs=\$$1 || rs=
[ -n "$2" ] && devdir="-m "$2"" || devdir=
_me="devfs_apply_ruleset"
if [ -z "$rs" ]; then
warn "$_me: you must specify a ruleset"
return 1
fi
debug "$_me: applying ruleset ($rs) to mount-point (${devdir#-m })"
if ! /sbin/devfs $devdir rule -s $rs applyset; then
warn "$_me: unable to apply ruleset $rs to ${devdir#-m }"
return 1
fi
return 0
}
# devfs_domount dir [ruleset]
# Mount devfs on dir. If ruleset is specified it is set
# on the mount-point. It must also be a ruleset name as specified
# in a devfs.rules(5) file. Returns 0 on success.
#
devfs_domount()
{
local devdir rs _me
devdir="$1"
[ -n "$2" ] && rs=$2 || rs=
_me="devfs_domount()"
if [ -z "$devdir" ]; then
warn "$_me: you must specify a mount-point"
return 1
fi
debug "$_me: mount-point is ($devdir), ruleset is ($rs)"
if ! mount -t devfs dev "$devdir"; then
warn "$_me: Unable to mount devfs on $devdir"
return 1
fi
if [ -n "$rs" ]; then
devfs_init_rulesets
devfs_set_ruleset $rs $devdir
devfs -m $devdir rule applyset
fi
return 0
}
# devfs_mount_jail dir [ruleset]
# Mounts a devfs file system appropriate for jails
# on the directory dir. If ruleset is specified, the ruleset
# it names will be used instead. If present, ruleset must
# be the name of a ruleset as defined in a devfs.rules(5) file.
# This function returns non-zero if an error occurs.
#
devfs_mount_jail()
{
local jdev rs _me
jdev="$1"
[ -n "$2" ] && rs=$2 || rs="devfsrules_jail"
_me="devfs_mount_jail"
devfs_init_rulesets
if ! devfs_domount "$jdev" $rs; then
warn "$_me: devfs was not mounted on $jdev"
return 1
fi
return 0
}
# Provide a function for normalizing the mounting of memory
# filesystems. This should allow the rest of the code here to remain
# as close as possible between 5-current and 4-stable.
# $1 = size
# $2 = mount point
# $3 = (optional) extra mdmfs flags
mount_md()
{
if [ -n "$3" ]; then
flags="$3"
fi
/sbin/mdmfs $flags -s $1 md $2
}
# Code common to scripts that need to load a kernel module
# if it isn't in the kernel yet. Syntax:
# load_kld [-e regex] [-m module] file
# where -e or -m chooses the way to check if the module
# is already loaded:
# regex is egrep'd in the output from `kldstat -v',
# module is passed to `kldstat -m'.
# The default way is as though `-m file' were specified.
load_kld()
{
local _loaded _mod _opt _re
while getopts "e:m:" _opt; do
case "$_opt" in
e) _re="$OPTARG" ;;
m) _mod="$OPTARG" ;;
*) err 3 'USAGE: load_kld [-e regex] [-m module] file' ;;
esac
done
shift $(($OPTIND - 1))
if [ $# -ne 1 ]; then
err 3 'USAGE: load_kld [-e regex] [-m module] file'
fi
_mod=${_mod:-$1}
_loaded=false
if [ -n "$_re" ]; then
if kldstat -v | egrep -q -e "$_re"; then
_loaded=true
fi
else
if kldstat -q -m "$_mod"; then
_loaded=true
fi
fi
if ! $_loaded; then
if ! kldload "$1"; then
warn "Unable to load kernel module $1"
return 1
else
info "$1 kernel module loaded."
fi
else
debug "load_kld: $1 kernel module already loaded."
fi
return 0
}
# ltr str src dst
# Change every $src in $str to $dst.
# Useful when /usr is not yet mounted and we cannot use tr(1), sed(1) nor
# awk(1).
ltr()
{
local _str _src _dst _out _com
_str=$1
_src=$2
_dst=$3
_out=""
IFS=${_src}
for _com in ${_str}; do
if [ -z "${_out}" ]; then
_out="${_com}"
else
_out="${_out}${_dst}${_com}"
fi
done
echo "${_out}"
}
# Creates a list of providers for GELI encryption.
geli_make_list()
{
local devices devices2
local provider mountpoint type options rest
# Create list of GELI providers from fstab.
while read provider mountpoint type options rest ; do
case ":${options}" in
:*noauto*)
noauto=yes
;;
*)
noauto=no
;;
esac
case ":${provider}" in
:#*)
continue
;;
*.eli)
# Skip swap devices.
if [ "${type}" = "swap" -o "${options}" = "sw" -o "${noauto}" = "yes" ]; then
continue
fi
devices="${devices} ${provider}"
;;
esac
done < /etc/fstab
# Append providers from geli_devices.
devices="${devices} ${geli_devices}"
for provider in ${devices}; do
provider=${provider%.eli}
provider=${provider#/dev/}
devices2="${devices2} ${provider}"
done
echo ${devices2}
}
# Find scripts in local_startup directories that use the old syntax
#
find_local_scripts_old () {
zlist=''
slist=''
for dir in ${local_startup}; do
if [ -d "${dir}" ]; then
for file in ${dir}/[0-9]*.sh; do
grep '^# PROVIDE:' $file >/dev/null 2>&1 &&
continue
zlist="$zlist $file"
done
for file in ${dir}/[^0-9]*.sh; do
grep '^# PROVIDE:' $file >/dev/null 2>&1 &&
continue
slist="$slist $file"
done
fi
done
}
find_local_scripts_new () {
local_rc=''
for dir in ${local_startup}; do
if [ -d "${dir}" ]; then
for file in `grep -l '^# PROVIDE:' ${dir}/* 2>/dev/null`; do
case "$file" in
*.sample) ;;
*) if [ -x "$file" ]; then
local_rc="${local_rc} ${file}"
fi
;;
esac
done
fi
done
}
# check_required_{before|after} command
# Check for things required by the command before and after its precmd,
# respectively. The two separate functions are needed because some
# conditions should prevent precmd from being run while other things
# depend on precmd having already been run.
#
check_required_before()
{
local _f
case "$1" in
start)
for _f in $required_vars; do
if ! checkyesno $_f; then
warn "\$${_f} is not enabled."
if [ -z "$rc_force" ]; then
return 1
fi
fi
done
for _f in $required_dirs; do
if [ ! -d "${_f}/." ]; then
warn "${_f} is not a directory."
if [ -z "$rc_force" ]; then
return 1
fi
fi
done
for _f in $required_files; do
if [ ! -r "${_f}" ]; then
warn "${_f} is not readable."
if [ -z "$rc_force" ]; then
return 1
fi
fi
done
;;
esac
return 0
}
check_required_after()
{
local _f _args
case "$1" in
start)
for _f in $required_modules; do
case "${_f}" in
*~*) _args="-e ${_f#*~} ${_f%%~*}" ;;
*:*) _args="-m ${_f#*:} ${_f%%:*}" ;;
*) _args="${_f}" ;;
esac
if ! load_kld ${_args}; then
if [ -z "$rc_force" ]; then
return 1
fi
fi
done
;;
esac
return 0
}
fi
_rc_subr_loaded=:
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