freebsd-dev/etc/rc.subr
Doug Barton a6f9d19c1e In wait_for_pids(), pwait(1) can return when the process exits, but
still exists as a zombie. The 'kill -0' test in this function can
therefore return true even if the process isn't actually running.
This could lead to wait_for_pids() printing an endless string of the
pid number until the zombie finally exits.

Solve this problem by moving the sleep up to after the 'kill -0' test, but
only after we've run through the function once already. In the common case
(only one pid in the list) this will always do the right thing. On the rare
occasion that there is more than one pid in the list this will sleep 1
second per zombie process which will allow that process, and any other
in the list a chance to exit.

While I'm here, local'ize the variables that this function uses.
2010-04-06 05:20:46 +00:00

1714 lines
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Plaintext

# $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.
#
# 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:=$$}; export RC_PID
#
# Operating System dependent/independent variables
#
if [ -z "${_rc_subr_loaded}" ]; then
_rc_subr_loaded="YES"
SYSCTL="/sbin/sysctl"
SYSCTL_N="${SYSCTL} -n"
SYSCTL_W="${SYSCTL}"
ID="/usr/bin/id"
IDCMD="if [ -x $ID ]; then $ID -un; fi"
PS="/bin/ps -ww"
JID=`$PS -p $$ -o jid=`
#
# functions
# ---------
# set_rcvar [var] [defval] [desc]
#
# Echo or define a rc.conf(5) variable name. Global variable
# $rcvars is used.
#
# If no argument is specified, echo "${name}_enable".
#
# If only a var is specified, echo "${var}_enable".
#
# If var and defval are specified, the ${var} is defined as
# rc.conf(5) variable and the default value is ${defvar}. An
# optional argument $desc can also be specified to add a
# description for that.
#
set_rcvar()
{
case $# in
0)
echo ${name}_enable
;;
1)
echo ${1}_enable
;;
*)
debug "rcvar_define: \$$1=$2 is added" \
" as a rc.conf(5) variable."
local _var
_var=$1
rcvars="${rcvars# } $_var"
eval ${_var}_defval=\"$2\"
shift 2
# encode multiple lines of _desc
for l in "$@"; do
eval ${_var}_desc=\"\${${_var}_desc#^^}^^$l\"
done
eval ${_var}_desc=\"\${${_var}_desc#^^}\"
;;
esac
}
# set_rcvar_obsolete oldvar [newvar] [msg]
# Define obsolete variable.
# Global variable $rcvars_obsolete is used.
#
set_rcvar_obsolete()
{
local _var
_var=$1
debug "rcvar_obsolete: \$$1(old) -> \$$2(new) is defined"
rcvars_obsolete="${rcvars_obsolete# } $1"
eval ${1}_newvar=\"$2\"
shift 2
eval ${_var}_obsolete_msg=\"$*\"
}
#
# 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 $_proccheck
}
#
# wait_for_pids pid [pid ...]
# spins until none of the pids exist
#
wait_for_pids()
{
local _list _prefix _nlist _j
_list="$@"
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"
[ -n "$_prefix" ] && sleep 1
fi
done
if [ -z "$_nlist" ]; then
break
fi
_list=$_nlist
echo -n ${_prefix:-"Waiting for PIDS: "}$_list
_prefix=", "
pwait $_list 2>/dev/null
done
if [ -n "$_prefix" ]; then
echo "."
fi
}
#
# check_startmsgs
# If rc_quiet is set (usually as a result of using faststart at
# boot time) check if rc_startmsgs is enabled.
#
check_startmsgs()
{
if [ -n "$rc_quiet" ]; then
checkyesno rc_startmsgs
else
return 0
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.
#
# desc n Description of script.
#
# 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=${_override_command:-$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
#
check_startmsgs && 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 -n "# $name"
if [ -n "$desc" ]; then
echo " : $desc"
else
echo ""
fi
echo "#"
# Get unique vars in $rcvar $rcvars
for _v in $rcvar $rcvars; do
case $v in
$_v\ *|\ *$_v|*\ $_v\ *) ;;
*) v="${v# } $_v" ;;
esac
done
# Display variables.
for _v in $v; do
if [ -z "$_v" ]; then
continue
fi
eval _desc=\$${_v}_desc
eval _defval=\$${_v}_defval
_h="-"
eval echo \"$_v=\\\"\$$_v\\\"\"
# decode multiple lines of _desc
while [ -n "$_desc" ]; do
case $_desc in
*^^*)
echo "# $_h ${_desc%%^^*}"
_desc=${_desc#*^^}
_h=" "
;;
*)
echo "# $_h ${_desc}"
break
;;
esac
done
echo "# (default: \"$_defval\")"
done
echo ""
;;
*)
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
# when $rc_fast_and_loose is set, otherwise it is run as a child process.
# If `file' appears to be a backup or scratch file, ignore it.
# Otherwise if it is 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 rcvars rcvars_obsolete required_dirs required_files \
required_vars
eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd
case "$_file" in
/etc/rc.d/*.sh) # no longer allowed in the base
warn "Ignoring old-style startup script $_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 $$" 3
trap "echo Script $_file interrupted; exit 1" 2
trap "echo Script $_file running" 29
set $_arg; . $_file )
fi
fi
;;
esac
}
#
# load_rc_config name
# Source in the configuration file for a given name.
#
load_rc_config()
{
local _name _var _defval _v _msg _new
_name=$1
if [ -z "$_name" ]; then
err 3 'USAGE: load_rc_config name'
fi
if ${_rc_conf_loaded:-false}; then
:
else
if [ -r /etc/defaults/rc.conf ]; then
debug "Sourcing /etc/defaults/rc.conf"
. /etc/defaults/rc.conf
source_rc_confs
elif [ -r /etc/rc.conf ]; then
debug "Sourcing /etc/rc.conf (/etc/defaults/rc.conf doesn't exist)."
. /etc/rc.conf
fi
_rc_conf_loaded=true
fi
if [ -f /etc/rc.conf.d/"$_name" ]; then
debug "Sourcing /etc/rc.conf.d/${_name}"
. /etc/rc.conf.d/"$_name"
fi
# Old variable names support
#
[ -n "$enable_quotas" ] && quota_enable="$enable_quotas"
# Set defaults if defined.
for _var in $rcvar $rcvars; do
_defval=`eval echo "\\\$${_var}_defval"`
if [ -n "$_defval" ]; then
eval : \${$_var:=\$${_var}_defval}
fi
done
# check obsolete rc.conf variables
for _var in $rcvars_obsolete; do
_v=`eval echo \\$$_var`
_msg=`eval echo \\$${_var}_obsolete_msg`
_new=`eval echo \\$${_var}_newvar`
case $_v in
"")
;;
*)
if [ -z "$_new" ]; then
_msg="Ignored."
else
eval $_new=\"\$$_var\"
if [ -z "$_msg" ]; then
_msg="Use \$$_new instead."
fi
fi
warn "\$$_var is obsolete. $_msg"
;;
esac
done
}
#
# 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
# _echoonce var msg mode
# mode=0: Echo $msg if ${$var} is empty.
# After doing echo, a string is set to ${$var}.
#
# mode=1: Echo $msg if ${$var} is a string with non-zero length.
#
_echoonce()
{
local _var _msg _mode
_var=`eval echo \\$$1`
_msg=$2
_mode=$3
case $_mode in
1) [ -n "$_var" ] && echo "$_msg" ;;
*) [ -z "$_var" ] && echo -n "$_msg" && eval "$1=finished" ;;
esac
}
_rc_subr_loaded=: