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minix/etc/rc.subr
Lionel Sambuc 9152e1c5a7 Upgrading build system to new NetBSD revision 
The tested targets are the followgin ones:
 * tools
 * distribution
 * sets
 * release

The remaining NetBSD targets have not been disabled nor tested
*at all*. Try them at your own risk, they may reboot the earth.

For all compliant Makefiles, objects and generated files are put in
MAKEOBJDIR, which means you can now keep objects between two branch
switching. Same for DESTDIR, please refer to build.sh options.

Regarding new or modifications of Makefiles a few things:
 * Read share/mk/bsd.README
 * If you add a subdirectory, add a Makefile in it, and have it called
   by the parent through the SUBDIR variable.
 * Do not add arbitrary inclusion which crosses to another branch of
   the hierarchy; If you can't do without it, put a comment on why.
   If possible, do not use inclusion at all.
 * Use as much as possible the infrastructure, it is here to make
   life easier, do not fight it.

Sets and package are now used to track files.
We have one set called "minix", composed of one package called "minix-sys"
2012-11-15 16:07:29 +01:00

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# $NetBSD: rc.subr,v 1.88 2011/08/11 22:52:47 apb Exp $
#
# Copyright (c) 1997-2011 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
nl='
' # a literal newline
#
# functions
# ---------
#
# 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}
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
}
#
# yesno_to_truefalse var
# Convert the value of a variable from any of the values
# understood by checkyesno() to "true" or "false".
#
yesno_to_truefalse()
{
local var=$1
if checkyesno $var; then
eval $var=true
return 0
else
eval $var=false
return 1
fi
}
#
# reverse_list list
# print the list in reverse order
#
reverse_list()
{
_revlist=
for _revfile; do
_revlist="$_revfile $_revlist"
done
echo $_revlist
}
#
# If booting directly to multiuser, send SIGTERM to
# the parent (/etc/rc) to abort the boot.
# Otherwise just exit.
#
stop_boot()
{
if [ "$autoboot" = yes ]; 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.
# It's not an error if file systems prefixed with "OPTIONAL:"
# are not mentioned in /etc/fstab.
#
mount_critical_filesystems()
{
eval _fslist=\$critical_filesystems_${1}
_mountcrit_es=0
for _fs in $_fslist; do
_optional=false
case "$_fs" in
OPTIONAL:*)
_optional=true
_fs="${_fs#*:}"
;;
esac
_ismounted=false
# look for a line like "${fs} on * type *"
# or "* on ${fs} type *" in the output from mount.
case "${nl}$( mount )${nl}" in
*" on ${_fs} type "*)
_ismounted=true
;;
*"${nl}${_fs} on "*)
_ismounted=true
;;
esac
if $_ismounted; then
print_rc_metadata \
"note:File system ${_fs} was already mounted"
else
_mount_output=$( mount $_fs 2>&1 )
_mount_es=$?
case "$_mount_output" in
*"${nl}"*)
# multiple lines can't be good,
# not even if $_optional is true
;;
*'unknown special file or file system'*)
if $_optional; then
# ignore this error
print_rc_metadata \
"note:Optional file system ${_fs} is not present"
_mount_es=0
_mount_output=""
fi
;;
esac
if [ -n "$_mount_output" ]; then
printf >&2 "%s\n" "$_mount_output"
fi
if [ "$_mount_es" != 0 ]; then
_mountcrit_es="$_mount_es"
fi
fi
done
return $_mountcrit_es
}
#
# 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
return
fi
read _pid _junk < $_pidfile
if [ -z "$_pid" ]; then
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` + ")"
#
# 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=$3
_pref=
_procnamebn=${_procname##*/}
if [ $_interpreter != "." ]; then # an interpreted script
read _interp < ${_chroot:-}/$_procname # read interpreter name
_interp=${_interp#\#!} # strip #!
set -- $_interp
if [ $1 = "/usr/bin/env" ]; then
shift
set -- $(type $1)
shift $(($# - 1))
_interp="${1##*/} $_procname"
else
_interp="$* $_procname"
fi
if [ $_interpreter != $1 ]; then
warn "\$command_interpreter $_interpreter != $1"
fi
_interpbn=${1##*/}
_fp_args='_argv'
_fp_match='case "$_argv" in
${_interp}|"${_interp} "*|"${_interpbn}: "*${_procnamebn}*)'
else # a normal daemon
_fp_args='_arg0 _argv'
_fp_match='case "$_arg0" in
$_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")'
fi
_proccheck='
ps -o "pid,command" '"$_psargs"' |
while read _npid '"$_fp_args"'; do
case "$_npid" in
PID)
continue ;;
esac ; '"$_fp_match"'
echo -n "$_pref$_npid" ;
_pref=" "
;;
esac
done'
#echo 1>&2 "proccheck is :$_proccheck:"
eval $_proccheck
}
#
# wait_for_pids pid [pid ...]
# spins until none of the pids exist
#
wait_for_pids()
{
_list="$@"
if [ -z "$_list" ]; then
return
fi
_prefix=
while true; do
_nlist="";
for _j in $_list; do
if kill -0 $_j 2>/dev/null; then
_nlist="${_nlist}${_nlist:+ }$_j"
fi
done
if [ -z "$_nlist" ]; then
break
fi
_list=$_nlist
echo -n ${_prefix:-"Waiting for PIDS: "}$_list
_prefix=", "
sleep 2
done
if [ -n "$_prefix" ]; then
echo "."
fi
}
#
# run_rc_command argument [parameters]
# 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), and pass the optional list of parameters to it.
#
# If argument has a given prefix, then change the operation as follows:
# Prefix Operation
# ------ ---------
# fast Skip the pid check, and set rc_fast=yes
# force Set ${rcvar} to YES, and set rc_force=yes
# one Set ${rcvar} to YES
#
# The following globals are used:
#
# Name Needed Purpose
# ---- ------ -------
# name y Name of script.
#
# command n Full path to command.
# Not needed if ${rc_arg}_cmd is set for
# each keyword.
#
# command_args n Optional args/shell directives for command.
#
# command_interpreter n If not empty, command is interpreted, so
# call check_{pidfile,process}() appropriately.
#
# extra_commands n List of extra commands supported.
#
# pidfile n If set, use check_pidfile $pidfile $command,
# otherwise use check_process $command.
# In either case, only check if $command is set.
#
# procname n Process name to check for instead of $command.
#
# rcvar n This is checked with checkyesno to determine
# if the action should be run.
#
# ${name}_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 Additional environment variable settings
# for running ${command}
#
# ${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 the default
# (re)start command.
#
# required_files n If set, check for the readability of the given
# files before running the default (re)start
# command.
#
# 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.
#
# 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.)
#
#
run_rc_command()
{
rc_arg=$1
if [ -z "$name" ]; then
err 3 'run_rc_command: $name is not set.'
fi
_rc_prefix=
case "$rc_arg" in
fast*) # "fast" prefix; don't check pid
rc_arg=${rc_arg#fast}
rc_fast=yes
;;
force*) # "force" prefix; always run
rc_force=yes
_rc_prefix=force
rc_arg=${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 ${rcvar}=YES
fi
;;
esac
_keywords="start stop restart rcvar"
if [ -n "$extra_commands" ]; then
_keywords="${_keywords} ${extra_commands}"
fi
rc_pid=
_pidcmd=
_procname=${procname:-${command}}
# setup pid check command if not fast
if [ -z "$rc_fast" -a -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
shift # remove $rc_arg from the positional parameters
if [ -n "$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 \
_env=\"\$${name}_env\"
if [ -n "$_user" ]; then # unset $_user if running as that user
if [ "$_user" = "$(id -un)" ]; then
unset _user
fi
fi
# if ${rcvar} is set, and $1 is not
# "rcvar", then run
# checkyesno ${rcvar}
# and return if that failed or warn
# user and exit when interactive
#
if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then
if ! checkyesno ${rcvar}; then
# check whether interactive or not
if [ -n "$_run_rc_script" ]; then
return 0
fi
for _elem in $_keywords; do
if [ "$_elem" = "$rc_arg" ]; then
cat 1>&2 <<EOF
\$${rcvar} is not enabled - see ${rcvar_manpage}.
Use the following if you wish to perform the operation:
$0 one${rc_arg}
EOF
exit 1
fi
done
echo 1>&2 "$0: unknown directive '$rc_arg'."
rc_usage "$_keywords"
fi
fi
eval $_pidcmd # determine the pid if necessary
for _elem in $_keywords; do
if [ "$_elem" != "$rc_arg" ]; then
continue
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
# if the precmd failed and force
# isn't set, exit
#
if ! eval $_precmd && [ -z "$rc_force" ]; then
return 1
fi
if ! eval $_cmd \"\${@}\" && [ -z "$rc_force" ]; then
return 1
fi
eval $_postcmd
return 0
fi
if [ ${#} -gt 0 ]; then
err 1 "the $rc_arg command does not take any parameters"
fi
case "$rc_arg" in # default operations...
status)
if [ -n "$rc_pid" ]; then
echo "${name} is running as pid $rc_pid."
else
echo "${name} is not running."
return 1
fi
;;
start)
if [ -n "$rc_pid" ]; then
echo 1>&2 "${name} already running? (pid=$rc_pid)."
exit 1
fi
if [ ! -x ${_chroot}${command} ]; then
return 0
fi
# check for required variables,
# directories, and files
#
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
# if the precmd failed and force
# isn't set, exit
#
if ! eval $_precmd && [ -z "$rc_force" ]; then
return 1
fi
# setup the command to run, and run it
#
echo "Starting ${name}."
if [ -n "$_chroot" ]; then
_doit="\
${_env:+env $_env }\
${_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; }\
${_env:+env $_env }\
${_nice:+nice -n $_nice }\
$command $rc_flags $command_args"
if [ -n "$_user" ]; then
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
fi
fi
# if the cmd failed and force
# isn't set, exit
#
if ! eval $_doit && [ -z "$rc_force" ]; then
return 1
fi
# finally, run postcmd
#
eval $_postcmd
;;
stop)
if [ -z "$rc_pid" ]; then
if [ -n "$pidfile" ]; then
echo 1>&2 \
"${name} not running? (check $pidfile)."
else
echo 1>&2 "${name} not running?"
fi
exit 1
fi
# if the precmd failed and force
# isn't set, exit
#
if ! eval $_precmd && [ -z "$rc_force" ]; then
return 1
fi
# send the signal to stop
#
echo "Stopping ${name}."
_doit="kill -${sig_stop:-TERM} $rc_pid"
if [ -n "$_user" ]; then
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
fi
# if the stop cmd failed and force
# isn't set, exit
#
if ! eval $_doit && [ -z "$rc_force" ]; then
return 1
fi
# wait for the command to exit,
# and run postcmd.
wait_for_pids $rc_pid
eval $_postcmd
;;
reload)
if [ -z "$rc_pid" ]; then
if [ -n "$pidfile" ]; then
echo 1>&2 \
"${name} not running? (check $pidfile)."
else
echo 1>&2 "${name} not running?"
fi
exit 1
fi
echo "Reloading ${name} config files."
if ! eval $_precmd && [ -z "$rc_force" ]; then
return 1
fi
_doit="kill -${sig_reload:-HUP} $rc_pid"
if [ -n "$_user" ]; then
_doit="su -m $_user -c 'sh -c \"$_doit\"'"
fi
if ! eval $_doit && [ -z "$rc_force" ]; then
return 1
fi
eval $_postcmd
;;
restart)
if ! eval $_precmd && [ -z "$rc_force" ]; then
return 1
fi
# prevent restart being called more
# than once by any given script
#
if ${_rc_restart_done:-false}; then
return 0
fi
_rc_restart_done=true
( $0 ${_rc_prefix}stop )
$0 ${_rc_prefix}start
eval $_postcmd
;;
poll)
if [ -n "$rc_pid" ]; then
wait_for_pids $rc_pid
fi
;;
rcvar)
echo "# $name"
if [ -n "$rcvar" ]; then
if checkyesno ${rcvar}; then
echo "\$${rcvar}=YES"
else
echo "\$${rcvar}=NO"
fi
fi
;;
*)
rc_usage "$_keywords"
;;
esac
return 0
done
echo 1>&2 "$0: unknown directive '$rc_arg'."
rc_usage "$_keywords"
exit 1
}
#
# run_rc_script file arg
# Start the script `file' with `arg', and correctly handle the
# return value from the script. If `file' ends with `.sh', it's
# sourced into the current environment. If `file' appears to be
# a backup or scratch file, ignore it. Otherwise if it's
# executable run as a child process.
#
# If `file' contains "KEYWORD: interactive" and if we are
# running inside /etc/rc with postprocessing (as signified by
# _rc_postprocessor_fd being defined) then the script's stdout
# and stderr are redirected to $_rc_original_stdout_fd and
# $_rc_original_stderr_fd, so the output will be displayed on the
# console but not intercepted by /etc/rc's postprocessor.
#
run_rc_script()
{
_file=$1
_arg=$2
if [ -z "$_file" -o -z "$_arg" ]; then
err 3 'USAGE: run_rc_script file arg'
fi
_run_rc_script=true
unset name command command_args command_interpreter \
extra_commands pidfile procname \
rcvar required_dirs required_files required_vars
eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd
_must_redirect=false
if [ -n "${_rc_postprocessor_fd}" ] \
&& _has_rcorder_keyword interactive $_file
then
_must_redirect=true
fi
case "$_file" in
*.sh) # run in current shell
if $_must_redirect; then
print_rc_metadata \
"note:Output from ${_file} is not logged"
no_rc_postprocess eval \
'set $_arg ; . $_file'
else
set $_arg ; . $_file
fi
;;
*[~#]|*.OLD|*.orig|*,v) # scratch file; skip
warn "Ignoring scratch file $_file"
;;
*) # run in subshell
if [ -x $_file ] && $_must_redirect; then
print_rc_metadata \
"note:Output from ${_file} is not logged"
if [ -n "$rc_fast_and_loose" ]; then
no_rc_postprocess eval \
'set $_arg ; . $_file'
else
no_rc_postprocess eval \
'( set $_arg ; . $_file )'
fi
elif [ -x $_file ]; then
if [ -n "$rc_fast_and_loose" ]; then
set $_arg ; . $_file
else
( set $_arg ; . $_file )
fi
else
warn "Ignoring non-executable file $_file"
fi
;;
esac
}
#
# load_rc_config command
# Source in the configuration file for a given command.
#
load_rc_config()
{
_command=$1
if [ -z "$_command" ]; then
err 3 'USAGE: load_rc_config command'
fi
if ${_rc_conf_loaded:-false}; then
:
else
. /etc/rc.conf
_rc_conf_loaded=true
fi
if [ -f /etc/rc.conf.d/"$_command" ]; then
. /etc/rc.conf.d/"$_command"
fi
}
#
# load_rc_config_var cmd var
# Read the rc.conf(5) var for cmd 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 cmd 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: $*"
}
#
# 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:operator $_cur $_cur,v
;;
remove)
cp /dev/null $_cur
ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
rcs -q -kb -U $_cur
chown root:operator $_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:operator $_cur
;;
remove)
mv -f $_cur $_back
;;
esac
fi
}
#
# handle_fsck_error fsck_exit_code
# Take action depending on the return code from fsck.
#
handle_fsck_error()
{
case $1 in
0) # OK
return
;;
2) # Needs re-run, still fs errors
echo "File system still has errors; re-run fsck manually!"
;;
4) # Root modified
echo "Root filesystem was modified, rebooting ..."
reboot -n
echo "Reboot failed; help!"
;;
8) # Check failed
echo "Automatic file system check failed; help!"
;;
12) # Got signal
echo "Boot interrupted."
;;
*)
echo "Unknown error $1; help!"
;;
esac
stop_boot
}
#
# _has_rcorder_keyword word file
# Check whether a file contains a "# KEYWORD:" comment with a
# specified keyword in the style used by rcorder(8).
#
_has_rcorder_keyword()
{
local word="$1"
local file="$2"
local line
[ -r "$file" ] || return 1
while read line; do
case "${line} " in
"# KEYWORD:"*[\ \ ]"${word}"[\ \ ]*)
return 0
;;
"#"*)
continue
;;
*[A-Za-z0-9]*)
# give up at the first non-empty non-comment line
return 1
;;
esac
done <"$file"
return 1
}
#
# print_rc_metadata string
# Print the specified string in such a way that the post-processor
# inside /etc/rc will treat it as meta-data.
#
# If we are not running inside /etc/rc, do nothing.
#
# For public use by any rc.d script, the string must begin with
# "note:", followed by arbitrary text. The intent is that the text
# will appear in a log file but not on the console.
#
# For private use within /etc/rc, the string must contain a
# keyword recognised by the rc_postprocess_metadata() function
# defined in /etc/rc, followed by a colon, followed by one or more
# colon-separated arguments associated with the keyword.
#
print_rc_metadata()
{
# _rc_postprocessor fd, if defined, is the fd to which we must
# print, prefixing the output with $_rc_metadata_prefix.
#
if [ -n "$_rc_postprocessor_fd" ]; then
command printf "%s%s\n" "$rc_metadata_prefix" "$1" \
>&${_rc_postprocessor_fd}
fi
}
#
# _flush_rc_output
# Arrange for output to be flushed, if we are running
# inside /etc/rc with postprocessing.
#
_flush_rc_output()
{
print_rc_metadata "nop"
}
#
# print_rc_normal [-n] string
# Print the specified string in such way that it is treated as
# normal output, regardless of whether or not we are running
# inside /etc/rc with post-processing.
#
# If "-n" is specified in $1, then the string in $2 is printed
# without a newline; otherwise, the string in $1 is printed
# with a newline.
#
# Intended use cases include:
#
# o An rc.d script can use ``print_rc_normal -n'' to print a
# partial line in such a way that it appears immediately
# instead of being buffered by rc(8)'s post-processor.
#
# o An rc.d script that is run via the no_rc_postprocess
# function (so most of its output is invisible to rc(8)'s
# post-processor) can use print_rc_normal to force some of its
# output to be seen by the post-processor.
#
#
print_rc_normal()
{
# If _rc_postprocessor_fd is defined, then it is the fd
# to which we must print; otherwise print to stdout.
#
local fd="${_rc_postprocessor_fd:-1}"
case "$1" in
"-n")
command printf "%s" "$2" >&${fd}
_flush_rc_output
;;
*)
command printf "%s\n" "$1" >&${fd}
;;
esac
}
#
# no_rc_postprocess cmd...
# Execute the specified command in such a way that its output
# bypasses the post-processor that handles the output from
# most commands that are run inside /etc/rc. If we are not
# inside /etc/rc, then just execute the command without special
# treatment.
#
# The intent is that interactive commands can be run via
# no_rc_postprocess(), and their output will apear immediately
# on the console instead of being hidden or delayed by the
# post-processor. An unfortunate consequence of the output
# bypassing the post-processor is that the output will not be
# logged.
#
no_rc_postprocess()
{
if [ -n "${_rc_postprocessor_fd}" ]; then
"$@" >&${_rc_original_stdout_fd} 2>&${_rc_original_stderr_fd}
else
"$@"
fi
}
#
# twiddle
# On each call, print a different one of "/", "-", "\\", "|",
# followed by a backspace. The most recently printed value is
# saved in $_twiddle_state.
#
# Output is to /dev/tty, so this function may be useful even inside
# a script whose output is redirected.
#
twiddle()
{
case "$_twiddle_state" in
'/') _next='-' ;;
'-') _next='\' ;;
'\') _next='|' ;;
*) _next='/' ;;
esac
command printf "%s\b" "$_next" >/dev/tty
_twiddle_state="$_next"
}
#
# human_exit_code
# Print the a human version of the exit code.
#
human_exit_code()
{
if [ "$1" -lt 127 ]
then
echo "exited with code $1"
elif [ "$(expr $1 % 256)" -eq 127 ]
then
# This cannot really happen because the shell will not
# pass stopped job status out and the exit code is limited
# to 8 bits. This code is here just for completeness.
echo "stopped with signal $(expr $1 / 256)"
else
echo "terminated with signal $(expr $1 - 128)"
fi
}
#
# collapse_backslash_newline
# Copy input to output, collapsing <backslash><newline>
# to nothing, but leaving other backslashes alone.
#
collapse_backslash_newline()
{
local line
while read -r line ; do
case "$line" in
*\\)
# print it, without the backslash or newline
command printf "%s" "${line%?}"
;;
*)
# print it, with a newline
command printf "%s\n" "${line}"
;;
esac
done
}
# Override the normal "echo" and "printf" commands, so that
# partial lines printed by rc.d scripts appear immediately,
# instead of being buffered by rc(8)'s post-processor.
#
# Naive use of the echo or printf commands from rc.d scripts,
# elsewhere in rc.subr, or anything else that sources rc.subr,
# will call these functions. To call the real echo and printf
# commands, use "command echo" or "command printf".
#
echo()
{
command echo "$@"
case "$1" in
'-n') _flush_rc_output ;;
esac
}
printf()
{
command printf "$@"
case "$1" in
*'\n') : ;;
*) _flush_rc_output ;;
esac
}
_rc_subr_loaded=:
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