[Please reply to freebsd-rc@] Hi,
I would like your feedback and testers of the attached patch. This
implements multiple instance support in rc.d scripts. You can try it
by replacing /etc/rc.subr with the attached one.
More details are as follow. Typically, an rc.d/foo script has the
following structure and rc.conf variables:
/etc/rc.d/foo:
----
name=foo
rcvar=foo_enable
...
load_rc_command $name
run_rc_command $*
----
/etc/rc.conf:
----
foo_enable="YES"
foo_flags="-f -l -a -g"
----
The above supports one instance for one script. After replacing
rc.subr, you can specify additional instances in rc.conf:
/etc/rc.conf:
----
foo_instances="one two"
foo_one_enable="YES"
foo_one_flags="-f -l -a -g"
foo_two_enable="YES"
foo_two_flags="-F -L -A -G"
----
$foo_instances defines instances by space-separated list of instance
names, and rc.conf variables for them are something like
${name}_${instname}_enable. The following command
# service foo start
starts foo_one and foo_two with the specified flags. Instances can
be specified in the following form:
# service foo start:one
or multiple instances in a particular order:
# service foo start:two,one
Basically, no change is required for the rc.d/foo script itself.
However, there is a problem that default values of the instantiated
variables are not defined.
For example, if an rc.d/script uses $foo_mode, you need to define
$foo_one_mode. The default value of $foo_mode is usually defined in
etc/defaults/rc.conf for rc.d scripts in the base system and ":
${foo_mode:=value}" idiom in scripts from Ports Collection. So all
of the variables should be defined for each instance, too. As you
noticed, this is not easy without editing the script itself.
To alleviate this, set_rcvar() can be used:
/etc/rc.d/foo:
----
name=foo
rcvar=foo_enable
set_rcvar foo_enable YES "Enable $name"
set_rcvar foo_program "/tmp/test" "Command for $name"
...
load_rc_command $name
run_rc_command $*
----
The three arguments are varname, default value, and description. If
a variable is defined by set_rcvar(), default values instantiated
variables will be set automatically---foo_one_program is set by
foo_program if it is not defined.
This approach still has another problem. set_rcvar() is not
supported in all branches, so a script using it does not work in old
supported branches. One solution which can be used for scripts in
Ports Collection is adding both definitions before and after
load_rc_command() until EoL of old branches like this:
/etc/rc.d/foo:
----
name=foo
rcvar=foo_enable
if type set_rcvar >/dev/null 2>&1; then
set_rcvar foo_enable YES "Enable $name"
set_rcvar foo_program "/tmp/test" "Command for $name"
fi
...
load_rc_command $name
# will be removed after all supported branches have set_rcvar().
if ! type set_rcvar >/dev/null 2>&1; then
: ${foo_enable:="YES"}
: ${foo_program:="/tmp/test"}
for _i in $foo_instances; do
for _j in enable program; do
eval : \${foo_${_i}_enable:=\$foo_$_j}
done
done
fi
run_rc_command $*
----
This is a bit ugly but should work fine.
I am using this patch to invoke multiple named (caching
server/contents server) and syslogd (local only/listens INET/INET6
socket only) daemons. While $foo_instances is designed as a
user-defined knob, this can be applied to software which need to
invoke multiple/different daemons which depend on each other in a
script, too.
I am feeling this patch still needs more careful review from others.
Any comments are welcome. Thank you.
-- Hiroki
Index: etc/rc.subr
===================================================================
--- etc/rc.subr (revision 272976)
+++ etc/rc.subr (working copy)
@@ -698,7 +698,10 @@
# "start stop restart rcvar status poll ${extra_commands}"
# If there's a match, run ${argument}_cmd or the default method
# (see below).
+# _run_rc_command0() is the main routine and run_rc_command() is
+# a wrapper to handle multiple instances.
#
+#
# If argument has a given prefix, then change the operation as follows:
# Prefix Operation
# ------ ---------
@@ -755,6 +758,9 @@
#
# ${name}_nice n Nice level to run ${command} at.
#
+# ${name}_pidfile n This to be used in /etc/rc.conf to override
+# ${pidfile}.
+#
# ${name}_user n User to run ${command} as, using su(1) if not
# using ${name}_chroot.
# Requires /usr to be mounted.
@@ -863,6 +869,57 @@
#
run_rc_command()
{
+ local _act _instances _name _desc _rcvar
+
+ _act=$1
+ shift
+ eval _instances=\$${name}_instances
+
+ # Check if instance is specified, e.g. "start:instance,...".
+ case ${_act%:*} in
+ $_act) ;; # no instance specified
+ *)
+ _instances=$(echo ${_act#*:} | tr "," " ")
+ _act=${_act%:*}
+ ;;
+ esac
+
+ # Use reverse order for stop.
+ case $_act in
+ *stop) _instances=$(reverse_list $_instances) ;;
+ esac
+
+ case $_instances in
+ "")
+ _name=$name
+ _inst=
+ _run_rc_command0 $_act "$@"
+ ;;
+ *)
+ _name=$name
+ _desc=$desc
+ _rcvar=$rcvar
+ for _inst in $_instances; do
+ # Use a subshell to preserve variables.
+ (
+ name=${_name}_$_inst
+ eval desc=\"$_desc\${${name}_desc+:\ }\$${name}_desc\"
+ rcvar=${_rcvar%_enable}_${_inst}_enable
+ _run_rc_command0 $_act "$@"
+ )
+ done
+ ;;
+ esac
+}
+
+getnameparam()
+{
+
+ eval echo \${$1_$_inst${_inst:+_}$2-\$$1_$2}
+}
+
+_run_rc_command0()
+{
_return=0
rc_arg=$1
if [ -z "$name" ]; then
@@ -904,8 +961,12 @@
;;
esac
- eval _override_command=\$${name}_program
- command=${_override_command:-$command}
+ if [ -z "$command" ]; then
+ command=$(getnameparam $_name program)
+ fi
+ if [ -z "$pidfile" ]; then
+ pidfile=$(getnameparam $_name pidfile)
+ fi
_keywords="start stop restart rcvar enabled $extra_commands"
rc_pid=
@@ -936,13 +997,16 @@
if [ -n "$flags" ]; then # allow override from environment
rc_flags=$flags
else
- eval rc_flags=\$${name}_flags
+ rc_flags=$(getnameparam $_name flags)
fi
- eval _chdir=\$${name}_chdir _chroot=\$${name}_chroot \
- _nice=\$${name}_nice _user=\$${name}_user \
- _group=\$${name}_group _groups=\$${name}_groups \
- _fib=\$${name}_fib _env=\$${name}_env \
- _prepend=\$${name}_prepend
+ _chdir=$(getnameparam $_name chdir)
+ _chroot=$(getnameparam $_name chroot)
+ _nice=$(getnameparam $_name nice)
+ _user=$(getnameparam $_name user)
+ _group=$(getnameparam $_name group)
+ _groups=$(getnameparam $_name groups)
+ _env=$(getnameparam $_name env)
+ _prepend=$(getnameparam $_name prepend)
if [ -n "$_user" ]; then # unset $_user if running as that user
if [ "$_user" = "$(eval $IDCMD)" ]; then
@@ -977,9 +1041,9 @@
# 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
+ _cmd=$(getnameparam $rc_arg cmd)
+ _precmd=$(getnameparam $rc_arg precmd)
+ _postcmd=$(getnameparam $rc_arg postcmd)
if [ -n "$_cmd" ]; then
_run_rc_precmd || return 1
@@ -1134,16 +1198,10 @@
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
+ for _v in $(getinstlist $_name "$_inst" $rcvar $rcvars);
+ do
if [ -z "$_v" ]; then
continue
fi
@@ -1150,24 +1208,20 @@
eval _desc=\$${_v}_desc
eval _defval=\$${_v}_defval
- _h="-"
+ eval _val=\$$_v
- 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\")"
+ case $_defval in
+ $_val)
+ _e=
+ _m=
+ ;;
+ *)
+ _e=" # (default: \"$_defval\")"
+ _m="(*)"
+ ;;
+ esac
+ echo "# $_v$_m${_desc+: }$_desc"
+ eval echo \"$_v=\\\"\$$_v\\\"\" \$_e
done
echo ""
;;
@@ -1308,11 +1362,104 @@
}
#
+# uniqlist var list
+# Put a list into $var with duplicate words removed.
+#
+uniqlist()
+{
+ local _uv _v
+
+ _uv=
+ for _v in "$@"; do
+ case $_uv in
+ $_v|$_v\ *|*\ $_v|*\ $_v\ *) ;;
+ *) _uv="${_uv# }${_uv:+ }$_v" ;;
+ esac
+ done
+ echo "$_uv"
+}
+#
+# createinstlist() name inst list
+# Generate a variable list with the instance name.
+#
+createinstlist()
+{
+ local _name _inst _v
+
+ _name=$1
+ _inst=$2
+ shift 2
+ for _v in $(uniqlist "$@"); do
+ echo "${_name}_${_inst}${_inst+_}${_v#${_name}_}"
+ done
+}
+#
+# getinstlist() name inst list
+# Get a variable list only with the instance name.
+#
+getinstlist()
+{
+ local _name _inst _v _l
+
+ _name=$1
+ _inst=$2
+ shift 2
+ _l=
+ for _v in $(uniqlist "$@"); do
+ case $_v in
+ ${_name}${_inst:+_}${_inst}_*) _l="${_l# }${_l:+ }$_v" ;;
+ esac
+ done
+ uniqlist $_l
+}
+
+#
# load_rc_config name
# Source in the configuration file for a given name.
+# load_rc_config0() is the main routine and load_rc_config() is
+# a wrapper to handle multiple instances.
#
load_rc_config()
{
+ local _instances _inst _name _rcvars _defval _desc _k _v _ul
+
+ # XXX: normalization
+ ltr "$name" "-" "_" name
+ ltr "$1" "-" "_" _name
+ _load_rc_config0 $_name
+
+ eval _instances=\$${_name}_instances
+ _rcvars=$rcvars
+
+ for _inst in $_instances; do
+ # Set default values for ${_name}_$_inst.
+
+ for _k in $(uniqlist $_rcvars); do
+ # _k includes _name
+ eval _defval=\${${_k}_defval}
+ eval _desc=\${${_k}_desc}
+ set_rcvar $(createinstlist $_name $_inst $_k) \
+ "$_defval" "$_desc"
+ done
+ for _k in $_rc_namevarlist; do
+ if [ "$_k" = "instances" ]; then
+ continue
+ fi
+ _k=${_name}_$_k
+ # _k includes _name
+ eval _defval=\${${_k}_defval}
+ eval _desc=\${${_k}_desc}
+ if [ -n "$_defval" ]; then
+ set_rcvar $(createinstlist $_name $_inst $_k) \
+ "$_defval" "$_desc"
+ fi
+ done
+ _load_rc_config0 ${_name}_$_inst
+ done
+}
+
+_load_rc_config0()
+{
local _name _rcvar_val _var _defval _v _msg _new _d
_name=$1
if [ -z "$_name" ]; then
# $NetBSD: rc.subr,v 1.67 2006/10/07 11:25:15 elad Exp $
# $FreeBSD: head/etc/rc.subr 272976 2014-10-12 02:42:36Z hrs $
#
# 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
#
: ${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
# ---------
# list_vars pattern
# List vars matching pattern.
#
list_vars()
{
set | { while read LINE; do
var="${LINE%%=*}"
case "$var" in
"$LINE"|*[!a-zA-Z0-9_]*) continue ;;
$1) echo $var
esac
done; }
}
# 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()
{
local _var
case $# in
0) echo ${name}_enable ;;
1) echo ${1}_enable ;;
*)
debug "set_rcvar: \$$1=$2 is added" \
" as a rc.conf(5) variable."
_var=$1
rcvars="${rcvars# } $_var"
eval ${_var}_defval=\"$2\"
shift 2
eval ${_var}_desc=\"$*\"
;;
esac
}
# set_rcvar_obsolete oldvar [newvar] [msg]
# Define obsolete variable.
# Global variable $rcvars_obsolete is used.
#
set_rcvar_obsolete()
{
local _var
_var=$1
debug "set_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 [rcvar]
# Force a service to start. Intended for use by services
# to resolve dependency issues.
# $1 - filename of script, in /etc/rc.d, to run
# $2 - name of the script's rcvar (minus the _enable)
#
force_depend()
{
local _depend _dep_rcvar
_depend="$1"
_dep_rcvar="${2:-$1}_enable"
[ -n "$rc_fast" ] && ! checkyesno always_force_depends &&
checkyesno $_dep_rcvar && return 0
/etc/rc.d/${_depend} forcestatus >/dev/null 2>&1 && return 0
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
}
#
# 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 rc.conf(5)."
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} "*|"[${_interpbn}]"|"${_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 $_proccheck
}
# sort_lite [-b] [-n] [-k POS] [-t SEP]
# A lite version of sort(1) (supporting a few options) that can be used
# before the real sort(1) is available (e.g., in scripts that run prior
# to mountcritremote). Requires only shell built-in functionality.
#
sort_lite()
{
local funcname=sort_lite
local sort_sep="$IFS" sort_ignore_leading_space=
local sort_field=0 sort_strict_fields= sort_numeric=
local nitems=0 skip_leading=0 trim=
local OPTIND flag
while getopts bnk:t: flag; do
case "$flag" in
b) sort_ignore_leading_space=1 ;;
n) sort_numeric=1 sort_ignore_leading_space=1 ;;
k) sort_field="${OPTARG%%,*}" ;; # only up to first comma
# NB: Unlike sort(1) only one POS allowed
t) sort_sep="$OPTARG"
if [ ${#sort_sep} -gt 1 ]; then
echo "$funcname: multi-character tab \`$sort_sep'" >&2
return 1
fi
sort_strict_fields=1
;;
\?) return 1 ;;
esac
done
shift $(( $OPTIND - 1 ))
# Create transformation pattern to trim leading text if desired
case "$sort_field" in
""|[!0-9]*|*[!0-9.]*)
echo "$funcname: invalid sort field \`$sort_field'" >&2
return 1
;;
*.*)
skip_leading=${sort_field#*.} sort_field=${sort_field%%.*}
while [ ${skip_leading:-0} -gt 1 ] 2> /dev/null; do
trim="$trim?" skip_leading=$(( $skip_leading - 1 ))
done
esac
# Copy input to series of local numbered variables
# NB: IFS of NULL preserves leading whitespace
local LINE
while IFS= read -r LINE || [ "$LINE" ]; do
nitems=$(( $nitems + 1 ))
local src_$nitems="$LINE"
done
#
# Sort numbered locals using insertion sort
#
local curitem curitem_orig curitem_mod curitem_haskey
local dest dest_orig dest_mod dest_haskey
local d gt n
local i=1
while [ $i -le $nitems ]; do
curitem_haskey=1 # Assume sort field (-k POS) exists
eval curitem=\"\$src_$i\"
curitem_mod="$curitem" # for modified comparison
curitem_orig="$curitem" # for original comparison
# Trim leading whitespace if desired
if [ "$sort_ignore_leading_space" ]; then
while case "$curitem_orig" in
[$IFS]*) : ;; *) false; esac
do
curitem_orig="${curitem_orig#?}"
done
curitem_mod="$curitem_orig"
fi
# Shift modified comparison value if sort field (-k POS) is > 1
n=$sort_field
while [ $n -gt 1 ]; do
case "$curitem_mod" in
*[$sort_sep]*)
# Cut text up-to (and incl.) first separator
curitem_mod="${curitem_mod#*[$sort_sep]}"
# Skip NULLs unless strict field splitting
[ "$sort_strict_fields" ] ||
[ "${curitem_mod%%[$sort_sep]*}" ] ||
[ $n -eq 2 ] ||
continue
;;
*)
# Asked for a field that doesn't exist
curitem_haskey= break
esac
n=$(( $n - 1 ))
done
# Trim trailing words if sort field >= 1
[ $sort_field -ge 1 -a "$sort_numeric" ] &&
curitem_mod="${curitem_mod%%[$sort_sep]*}"
# Apply optional trim (-k POS.TRIM) to cut leading characters
curitem_mod="${curitem_mod#$trim}"
# Determine the type of modified comparison to use initially
# NB: Prefer numerical if requested but fallback to standard
case "$curitem_mod" in
""|[!0-9]*) # NULL or begins with non-number
gt=">"
[ "$sort_numeric" ] && curitem_mod=0
;;
*)
if [ "$sort_numeric" ]; then
gt="-gt"
curitem_mod="${curitem_mod%%[!0-9]*}"
# NB: trailing non-digits removed
# otherwise numeric comparison fails
else
gt=">"
fi
esac
# If first time through, short-circuit below position-search
if [ $i -le 1 ]; then
d=0
else
d=1
fi
#
# Find appropriate element position
#
while [ $d -gt 0 ]
do
dest_haskey=$curitem_haskey
eval dest=\"\$dest_$d\"
dest_mod="$dest" # for modified comparison
dest_orig="$dest" # for original comparison
# Trim leading whitespace if desired
if [ "$sort_ignore_leading_space" ]; then
while case "$dest_orig" in
[$IFS]*) : ;; *) false; esac
do
dest_orig="${dest_orig#?}"
done
dest_mod="$dest_orig"
fi
# Shift modified value if sort field (-k POS) is > 1
n=$sort_field
while [ $n -gt 1 ]; do
case "$dest_mod" in
*[$sort_sep]*)
# Cut text up-to (and incl.) 1st sep
dest_mod="${dest_mod#*[$sort_sep]}"
# Skip NULLs unless strict fields
[ "$sort_strict_fields" ] ||
[ "${dest_mod%%[$sort_sep]*}" ] ||
[ $n -eq 2 ] ||
continue
;;
*)
# Asked for a field that doesn't exist
dest_haskey= break
esac
n=$(( $n - 1 ))
done
# Trim trailing words if sort field >= 1
[ $sort_field -ge 1 -a "$sort_numeric" ] &&
dest_mod="${dest_mod%%[$sort_sep]*}"
# Apply optional trim (-k POS.TRIM), cut leading chars
dest_mod="${dest_mod#$trim}"
# Determine type of modified comparison to use
# NB: Prefer numerical if requested, fallback to std
case "$dest_mod" in
""|[!0-9]*) # NULL or begins with non-number
gt=">"
[ "$sort_numeric" ] && dest_mod=0
;;
*)
if [ "$sort_numeric" ]; then
gt="-gt"
dest_mod="${dest_mod%%[!0-9]*}"
# NB: kill trailing non-digits
# for numeric comparison safety
else
gt=">"
fi
esac
# Break if we've found the proper element position
if [ "$curitem_haskey" -a "$dest_haskey" ]; then
if [ "$dest_mod" = "$curitem_mod" ]; then
[ "$dest_orig" ">" "$curitem_orig" ] &&
break
elif [ "$dest_mod" $gt "$curitem_mod" ] \
2> /dev/null
then
break
fi
else
[ "$dest_orig" ">" "$curitem_orig" ] && break
fi
# Break if we've hit the end
[ $d -ge $i ] && break
d=$(( $d + 1 ))
done
# Shift remaining positions forward, making room for new item
n=$i
while [ $n -ge $d ]; do
# Shift destination item forward one placement
eval dest_$(( $n + 1 ))=\"\$dest_$n\"
n=$(( $n - 1 ))
done
# Place the element
if [ $i -eq 1 ]; then
local dest_1="$curitem"
else
local dest_$d="$curitem"
fi
i=$(( $i + 1 ))
done
# Print sorted results
d=1
while [ $d -le $nitems ]; do
eval echo \"\$dest_$d\"
d=$(( $d + 1 ))
done
}
#
# wait_for_pids pid [pid ...]
# spins until none of the pids exist
#
wait_for_pids()
{
local _list _prefix _nlist _j
_list="$@"
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
}
#
# get_pidfile_from_conf string file
#
# Takes a string to search for in the specified file.
# Ignores lines with traditional comment characters.
#
# Example:
#
# if get_pidfile_from_conf string file; then
# pidfile="$_pidfile_from_conf"
# else
# pidfile='appropriate default'
# fi
#
get_pidfile_from_conf()
{
if [ -z "$1" -o -z "$2" ]; then
err 3 "USAGE: get_pidfile_from_conf string file ($name)"
fi
local string file line
string="$1" ; file="$2"
if [ ! -s "$file" ]; then
err 3 "get_pidfile_from_conf: $file does not exist ($name)"
fi
while read line; do
case "$line" in
*[#\;]*${string}*) continue ;;
*${string}*) break ;;
esac
done < $file
if [ -n "$line" ]; then
line=${line#*/}
_pidfile_from_conf="/${line%%[\"\;]*}"
else
return 1
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).
# _run_rc_command0() is the main routine and run_rc_command() is
# a wrapper to handle multiple instances.
#
#
# 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}_env n Environment variables to run ${command} with.
#
# ${name}_fib n Routing table number to run ${command} with.
#
# ${name}_nice n Nice level to run ${command} at.
#
# ${name}_pidfile n This to be used in /etc/rc.conf to override
# ${pidfile}.
#
# ${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.
#
# ${name}_prepend n Command added before ${command}.
#
# ${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).
#
# enabled Return true if the service is enabled.
#
# 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()
{
local _act _instances _name _desc _rcvar
_act=$1
shift
eval _instances=\$${name}_instances
# Check if instance is specified, e.g. "start:instance,...".
case ${_act%:*} in
$_act) ;; # no instance specified
*)
_instances=$(echo ${_act#*:} | tr "," " ")
_act=${_act%:*}
;;
esac
# Use reverse order for stop.
case $_act in
*stop) _instances=$(reverse_list $_instances) ;;
esac
case $_instances in
"")
_name=$name
_inst=
_run_rc_command0 $_act "$@"
;;
*)
_name=$name
_desc=$desc
_rcvar=$rcvar
for _inst in $_instances; do
# Use a subshell to preserve variables.
(
name=${_name}_$_inst
eval desc=\"$_desc\${${name}_desc+:\ }\$${name}_desc\"
rcvar=${_rcvar%_enable}_${_inst}_enable
_run_rc_command0 $_act "$@"
)
done
;;
esac
}
getnameparam()
{
eval echo \${$1_$_inst${_inst:+_}$2-\$$1_$2}
}
_run_rc_command0()
{
_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#${_rc_prefix}}
rc_quiet=yes
;;
esac
if [ -z "$command" ]; then
command=$(getnameparam $_name program)
fi
if [ -z "$pidfile" ]; then
pidfile=$(getnameparam $_name pidfile)
fi
_keywords="start stop restart rcvar enabled $extra_commands"
rc_pid=
_pidcmd=
_procname=${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 $_keywords
fi
if [ "$rc_arg" = "enabled" ] ; then
checkyesno ${rcvar}
return $?
fi
if [ -n "$flags" ]; then # allow override from environment
rc_flags=$flags
else
rc_flags=$(getnameparam $_name flags)
fi
_chdir=$(getnameparam $_name chdir)
_chroot=$(getnameparam $_name chroot)
_nice=$(getnameparam $_name nice)
_user=$(getnameparam $_name user)
_group=$(getnameparam $_name group)
_groups=$(getnameparam $_name groups)
_env=$(getnameparam $_name env)
_prepend=$(getnameparam $_name prepend)
if [ -n "$_user" ]; then # unset $_user if running as that user
if [ "$_user" = "$(eval $IDCMD)" ]; then
unset _user
fi
fi
[ -z "$autoboot" ] && eval $_pidcmd # determine the pid if necessary
for _elem in $_keywords; do
if [ "$_elem" != "$rc_arg" ]; then
continue
fi
# if ${rcvar} is set, $1 is not "rcvar"
# and ${rc_pid} is not set, then run
# checkyesno ${rcvar}
# and return if that failed
#
if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" -a "$rc_arg" !=
"stop" ] ||
[ -n "${rcvar}" -a "$rc_arg" = "stop" -a -z "${rc_pid}" ];
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 ${XXX_cmd},
# run that instead of the default
#
_cmd=$(getnameparam $rc_arg cmd)
_precmd=$(getnameparam $rc_arg precmd)
_postcmd=$(getnameparam $rc_arg postcmd)
if [ -n "$_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
if [ -z "$rc_quiet" ]; then
echo 1>&2 "${name} already running? " \
"(pid=$rc_pid)."
fi
return 1
fi
if [ ! -x "${_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 }\
${_fib:+setfib -F $_fib }\
${_env:+env $_env }\
chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
$_chroot $command $rc_flags $command_args"
else
_doit="\
${_chdir:+cd $_chdir && }\
${_fib:+setfib -F $_fib }\
${_env:+env $_env }\
$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 $_doit"
fi
if [ -n "$_prepend" ]; then
_doit="$_prepend $_doit"
fi
fi
# run the full command
#
if ! _run_rc_doit "$_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 "#"
# Display variables.
for _v in $(getinstlist $_name "$_inst" $rcvar $rcvars);
do
if [ -z "$_v" ]; then
continue
fi
eval _desc=\$${_v}_desc
eval _defval=\$${_v}_defval
eval _val=\$$_v
case $_defval in
$_val)
_e=
_m=
;;
*)
_e=" # (default: \"$_defval\")"
_m="(*)"
;;
esac
echo "# $_v$_m${_desc+: }$_desc"
eval echo \"$_v=\\\"\$$_v\\\"\" \$_e
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 >&2 ;
kill -QUIT $$" 3
trap "echo Script $_file interrupted >&2 ;
exit 1" 2
trap "echo Script $_file running >&2" 29
set $_arg; . $_file )
fi
fi
;;
esac
}
#
# uniqlist var list
# Put a list into $var with duplicate words removed.
#
uniqlist()
{
local _uv _v
_uv=
for _v in "$@"; do
case $_uv in
$_v|$_v\ *|*\ $_v|*\ $_v\ *) ;;
*) _uv="${_uv# }${_uv:+ }$_v" ;;
esac
done
echo "$_uv"
}
#
# createinstlist() name inst list
# Generate a variable list with the instance name.
#
createinstlist()
{
local _name _inst _v
_name=$1
_inst=$2
shift 2
for _v in $(uniqlist "$@"); do
echo "${_name}_${_inst}${_inst+_}${_v#${_name}_}"
done
}
#
# getinstlist() name inst list
# Get a variable list only with the instance name.
#
getinstlist()
{
local _name _inst _v _l
_name=$1
_inst=$2
shift 2
_l=
for _v in $(uniqlist "$@"); do
case $_v in
${_name}${_inst:+_}${_inst}_*) _l="${_l# }${_l:+ }$_v" ;;
esac
done
uniqlist $_l
}
#
# load_rc_config name
# Source in the configuration file for a given name.
# load_rc_config0() is the main routine and load_rc_config() is
# a wrapper to handle multiple instances.
#
load_rc_config()
{
local _instances _inst _name _rcvars _defval _desc _k _v _ul
# XXX: normalization
ltr "$name" "-" "_" name
ltr "$1" "-" "_" _name
_load_rc_config0 $_name
eval _instances=\$${_name}_instances
_rcvars=$rcvars
for _inst in $_instances; do
# Set default values for ${_name}_$_inst.
for _k in $(uniqlist $_rcvars); do
# _k includes _name
eval _defval=\${${_k}_defval}
eval _desc=\${${_k}_desc}
set_rcvar $(createinstlist $_name $_inst $_k) \
"$_defval" "$_desc"
done
for _k in $_rc_namevarlist; do
if [ "$_k" = "instances" ]; then
continue
fi
_k=${_name}_$_k
# _k includes _name
eval _defval=\${${_k}_defval}
eval _desc=\${${_k}_desc}
if [ -n "$_defval" ]; then
set_rcvar $(createinstlist $_name $_inst $_k) \
"$_defval" "$_desc"
fi
done
_load_rc_config0 ${_name}_$_inst
done
}
_load_rc_config0()
{
local _name _rcvar_val _var _defval _v _msg _new _d
_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
for _d in /etc ${local_startup%*/rc.d}; do
if [ -f ${_d}/rc.conf.d/"$_name" ]; then
debug "Sourcing ${_d}/rc.conf.d/$_name"
. ${_d}/rc.conf.d/"$_name"
elif [ -d ${_d}/rc.conf.d/"$_name" ] ; then
local _rc
for _rc in ${_d}/rc.conf.d/"$_name"/* ; do
if [ -f "$_rc" ] ; then
debug "Sourcing $_rc"
. "$_rc"
fi
done
fi
done
# Set defaults if defined.
for _var in $rcvar $rcvars; do
eval _defval=\$${_var}_defval
if [ -n "$_defval" ]; then
eval : \${$_var:=\$${_var}_defval}
fi
done
# check obsolete rc.conf variables
for _var in $rcvars_obsolete; do
eval _v=\$$_var
eval _msg=\$${_var}_obsolete_msg
eval _new=\$${_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: $0 [fast|force|one|quiet]("
_sep=
for _elem; do
echo -n 1>&2 "$_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 success, 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 _opts
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
# Disable globbing so that the rule patterns are not expanded
# by accident with matching filesystem entries.
_opts=$-; set -f
debug "reading rulesets from file ($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
case $_opts in *f*) ;; *) set +f ;; esac
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
if ! devfs_rulesets_from_file $file; then
warn "$_me: could not read rules from $file"
return 1
fi
done
devfs_rulesets_init=1
debug "$_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
}
# 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 [var]
# 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). If var is non-NULL, set it to the result.
ltr()
{
local _str _src _dst _out _com _var
_str="$1"
_src="$2"
_dst="$3"
_var="$4"
_out=""
local IFS="${_src}"
for _com in ${_str}; do
if [ -z "${_out}" ]; then
_out="${_com}"
else
_out="${_out}${_dst}${_com}"
fi
done
if [ -n "${_var}" ]; then
setvar "${_var}" "${_out}"
else
echo "${_out}"
fi
}
# 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
}
# check_jail mib
# Return true if security.jail.$mib exists and set to 1.
check_jail()
{
local _mib _v
_mib=$1
if _v=$(${SYSCTL_N} "security.jail.$_mib" 2> /dev/null); then
case $_v in
1) return 0;;
esac
fi
return 1
}
# check_kern_features mib
# Return existence of kern.features.* sysctl MIB as true or
# false. The result will be cached in $_rc_cache_kern_features_
# namespace. "0" means the kern.features.X exists.
check_kern_features()
{
local _v
[ -n "$1" ] || return 1;
eval _v=\$_rc_cache_kern_features_$1
[ -n "$_v" ] && return "$_v";
if ${SYSCTL_N} kern.features.$1 > /dev/null 2>&1; then
eval _rc_cache_kern_features_$1=0
return 0
else
eval _rc_cache_kern_features_$1=1
return 1
fi
}
# check_namevarlist var
# Return "0" if ${name}_var is reserved in rc.subr.
_rc_namevarlist="program chroot chdir env flags fib nice user group groups
prepend"
check_namevarlist()
{
local _v
for _v in $_rc_namevarlist; do
case $1 in
$_v) return 0 ;;
esac
done
return 1
}
# _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
eval _var=\$$1
_msg=$2
_mode=$3
case $_mode in
1) [ -n "$_var" ] && echo "$_msg" ;;
*) [ -z "$_var" ] && echo -n "$_msg" && eval "$1=finished" ;;
esac
}
fi # [ -z "${_rc_subr_loaded}" ]
_rc_subr_loaded=:
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