path: root/rc.d/init.d/functions

# -*-Shell-script-*-
#
# functions	This file contains functions to be used by most or all
#		shell scripts in the /etc/init.d directory.
#

TEXTDOMAIN=initscripts

# Make sure umask is sane
umask 022

# Set up a default search path.
PATH="/sbin:/usr/sbin:/bin:/usr/bin"
export PATH

if [ $PPID -ne 1 -a -z "$SYSTEMCTL_SKIP_REDIRECT" ] && \
		[ -d /run/systemd/system ] ; then
        case "$0" in
        /etc/init.d/*|/etc/rc.d/init.d/*)
		_use_systemctl=1
		;;
	esac
fi

systemctl_redirect () {
	local s
	local prog=${1##*/}
        local command=$2
        local options=""

	case "$command" in
	start)
		s=$"Starting $prog (via systemctl): "
		;;
	stop)
		s=$"Stopping $prog (via systemctl): "
		;;
	reload|try-reload)
		s=$"Reloading $prog configuration (via systemctl): "
		;;
	restart|try-restart|condrestart)
		s=$"Restarting $prog (via systemctl): "
		;;
	esac

        if [ -n "$SYSTEMCTL_IGNORE_DEPENDENCIES" ] ; then
                options="--ignore-dependencies"
        fi

        if ! systemctl show "$prog.service" > /dev/null 2>&1 || \
           systemctl show -p LoadState "$prog.service" | grep -q 'not-found' ; then
                action $"Reloading systemd: " /bin/systemctl daemon-reload
        fi

	action "$s" /bin/systemctl $options $command "$prog.service"
}

# Get a sane screen width
[ -z "${COLUMNS:-}" ] && COLUMNS=80

if [ -z "${CONSOLETYPE:-}" ]; then
  if [ -c "/dev/stderr" -a -r "/dev/stderr" ]; then
    CONSOLETYPE="$(/sbin/consoletype < /dev/stderr 2>/dev/null)"
  else
    CONSOLETYPE="serial"
  fi
fi

if [ -z "${NOLOCALE:-}" ] && [ -z "${LANGSH_SOURCED:-}" ] && [ -f /etc/sysconfig/i18n -o -f /etc/locale.conf ] ; then
  . /etc/profile.d/lang.sh 2>/dev/null
  # avoid propagating LANGSH_SOURCED any further
  unset LANGSH_SOURCED
fi

# Read in our configuration
if [ -z "${BOOTUP:-}" ]; then
  if [ -f /etc/sysconfig/init ]; then
      . /etc/sysconfig/init
  else
    # This all seem confusing? Look in /etc/sysconfig/init,
    # or in /usr/share/doc/initscripts-*/sysconfig.txt
    BOOTUP=color
    RES_COL=60
    MOVE_TO_COL="echo -en \\033[${RES_COL}G"
    SETCOLOR_SUCCESS="echo -en \\033[1;32m"
    SETCOLOR_FAILURE="echo -en \\033[1;31m"
    SETCOLOR_WARNING="echo -en \\033[1;33m"
    SETCOLOR_NORMAL="echo -en \\033[0;39m"
    LOGLEVEL=1
  fi
  if [ "$CONSOLETYPE" = "serial" ]; then
      BOOTUP=serial
      MOVE_TO_COL=
      SETCOLOR_SUCCESS=
      SETCOLOR_FAILURE=
      SETCOLOR_WARNING=
      SETCOLOR_NORMAL=
  fi
fi

# Check if any of $pid (could be plural) are running
checkpid() {
	local i

	for i in $* ; do
		[ -d "/proc/$i" ] && return 0
	done
	return 1
}

__kill_pids_term_kill_checkpids() {
    local base_stime=$1
    shift 1
    local pid=
    local pids=$*
    local remaining=
    local stat=
    local stime=

    for pid in $pids ; do
        [ ! -e  "/proc/$pid" ] && continue
        read -r line < "/proc/$pid/stat" 2> /dev/null

        stat=($line)
        stime=${stat[21]}

        [ -n "$stime" ] && [ "$base_stime" -lt "$stime" ] && continue
        remaining+="$pid "
    done

    echo "$remaining"
    [ -n "$remaining" ] && return 1

    return 0
}

__kill_pids_term_kill() {
    local try=0
    local delay=3;
    local pid=
    local stat=($(< /proc/self/stat))
    local base_stime=${stat[21]}

    if [ "$1" = "-d" ]; then
        delay=$2
        shift 2
    fi

    local kill_list=$*

    kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)

    [ -z "$kill_list" ] && return 0

    kill -TERM $kill_list >/dev/null 2>&1
    usleep 100000

    kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
    if [ -n "$kill_list" ] ; then
        while [ $try -lt $delay ] ; do
            sleep 1
            kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
            [ -z "$kill_list" ] && break
            let try+=1
        done
        if [ -n "$kill_list" ] ; then
            kill -KILL $kill_list >/dev/null 2>&1
            usleep 100000
            kill_list=$(__kill_pids_term_kill_checkpids $base_stime $kill_list)
        fi
    fi

    [ -n "$kill_list" ] && return 1
    return 0
}

# __proc_pids {program} [pidfile]
# Set $pid to pids from /var/run* for {program}.  $pid should be declared
# local in the caller.
# Returns LSB exit code for the 'status' action.
__pids_var_run() {
	local base=${1##*/}
	local pid_file=${2:-/var/run/$base.pid}
	local pid_dir=$(/usr/bin/dirname $pid_file > /dev/null)

	[ -d "$pid_dir" -a ! -r "$pid_dir" ] && return 4

	pid=
	if [ -f "$pid_file" ] ; then
	        local line p

		[ ! -r "$pid_file" ] && return 4 # "user had insufficient privilege"
		while : ; do
			read line
			[ -z "$line" ] && break
			for p in $line ; do
				[ -z "${p//[0-9]/}" ] && [ -d "/proc/$p" ] && pid="$pid $p"
			done
		done < "$pid_file"

	        if [ -n "$pid" ]; then
	                return 0
	        fi
		return 1 # "Program is dead and /var/run pid file exists"
	fi
	return 3 # "Program is not running"
}

# Output PIDs of matching processes, found using pidof
__pids_pidof() {
	pidof -c -m -o $$ -o $PPID -o %PPID -x "$1" || \
		pidof -c -m -o $$ -o $PPID -o %PPID -x "${1##*/}"
}


# A function to start a program.
daemon() {
	# Test syntax.
	local gotbase= force= nicelevel corelimit
	local pid base= user= nice= bg= pid_file=
	local cgroup=
	nicelevel=0
	while [ "$1" != "${1##[-+]}" ]; do
	  case $1 in
	    '')    echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
	           return 1;;
	    --check)
		   base=$2
		   gotbase="yes"
		   shift 2
		   ;;
	    --check=?*)
	    	   base=${1#--check=}
		   gotbase="yes"
		   shift
		   ;;
	    --user)
		   user=$2
		   shift 2
		   ;;
	    --user=?*)
	           user=${1#--user=}
		   shift
		   ;;
	    --pidfile)
		   pid_file=$2
		   shift 2
		   ;;
	    --pidfile=?*)
		   pid_file=${1#--pidfile=}
		   shift
		   ;;
	    --force)
	    	   force="force"
		   shift
		   ;;
	    [-+][0-9]*)
	    	   nice="nice -n $1"
	           shift
		   ;;
	    *)     echo $"$0: Usage: daemon [+/-nicelevel] {program}" "[arg1]..."
	           return 1;;
	  esac
	done

        # Save basename.
        [ -z "$gotbase" ] && base=${1##*/}

        # See if it's already running. Look *only* at the pid file.
	__pids_var_run "$base" "$pid_file"

	[ -n "$pid" -a -z "$force" ] && return

	# make sure it doesn't core dump anywhere unless requested
	corelimit="ulimit -S -c ${DAEMON_COREFILE_LIMIT:-0}"

	# if they set NICELEVEL in /etc/sysconfig/foo, honor it
	[ -n "${NICELEVEL:-}" ] && nice="nice -n $NICELEVEL"

	# if they set CGROUP_DAEMON in /etc/sysconfig/foo, honor it
	if [ -n "${CGROUP_DAEMON}" ]; then
		if [ ! -x /bin/cgexec ]; then
			echo -n "Cgroups not installed"; warning
			echo
		else
			cgroup="/bin/cgexec";
			for i in $CGROUP_DAEMON; do
				cgroup="$cgroup -g $i";
			done
		fi
	fi

	# Echo daemon
        [ "${BOOTUP:-}" = "verbose" -a -z "${LSB:-}" ] && echo -n " $base"

	# And start it up.
	if [ -z "$user" ]; then
	   $cgroup $nice /bin/bash -c "$corelimit >/dev/null 2>&1 ; $*"
	else
	   $cgroup $nice runuser -s /bin/bash $user -c "$corelimit >/dev/null 2>&1 ; $*"
	fi

	[ "$?" -eq 0 ] && success $"$base startup" || failure $"$base startup"
}

# A function to stop a program.
killproc() {
	local RC killlevel= base pid pid_file= delay try

	RC=0; delay=3; try=0
	# Test syntax.
	if [ "$#" -eq 0 ]; then
		echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
		return 1
	fi
	if [ "$1" = "-p" ]; then
		pid_file=$2
		shift 2
	fi
	if [ "$1" = "-d" ]; then
		delay=$(echo $2 | awk -v RS=' ' -v IGNORECASE=1 '{if($1!~/^[0-9.]+[smhd]?$/) exit 1;d=$1~/s$|^[0-9.]*$/?1:$1~/m$/?60:$1~/h$/?60*60:$1~/d$/?24*60*60:-1;if(d==-1) exit 1;delay+=d*$1} END {printf("%d",delay+0.5)}')
		if [ "$?" -eq 1 ]; then
			echo $"Usage: killproc [-p pidfile] [ -d delay] {program} [-signal]"
			return 1
		fi
		shift 2
	fi


	# check for second arg to be kill level
	[ -n "${2:-}" ] && killlevel=$2

        # Save basename.
        base=${1##*/}

        # Find pid.
	__pids_var_run "$1" "$pid_file"
	RC=$?
	if [ -z "$pid" ]; then
		if [ -z "$pid_file" ]; then
			pid="$(__pids_pidof "$1")"
		else
			[ "$RC" = "4" ] && { failure $"$base shutdown" ; return $RC ;}
		fi
	fi

        # Kill it.
        if [ -n "$pid" ] ; then
                [ "$BOOTUP" = "verbose" -a -z "${LSB:-}" ] && echo -n "$base "
		if [ -z "$killlevel" ] ; then
			__kill_pids_term_kill -d $delay $pid
			RC=$?
			[ "$RC" -eq 0 ] && success $"$base shutdown" || failure $"$base shutdown"
		# use specified level only
		else
		        if checkpid $pid; then
	                	kill $killlevel $pid >/dev/null 2>&1
				RC=$?
				[ "$RC" -eq 0 ] && success $"$base $killlevel" || failure $"$base $killlevel"
			elif [ -n "${LSB:-}" ]; then
				RC=7 # Program is not running
			fi
		fi
	else
		if [ -n "${LSB:-}" -a -n "$killlevel" ]; then
			RC=7 # Program is not running
		else
			failure $"$base shutdown"
			RC=0
		fi
	fi

        # Remove pid file if any.
	if [ -z "$killlevel" ]; then
            rm -f "${pid_file:-/var/run/$base.pid}"
	fi
	return $RC
}

# A function to find the pid of a program. Looks *only* at the pidfile
pidfileofproc() {
	local pid

	# Test syntax.
	if [ "$#" = 0 ] ; then
		echo $"Usage: pidfileofproc {program}"
		return 1
	fi

	__pids_var_run "$1"
	[ -n "$pid" ] && echo $pid
	return 0
}

# A function to find the pid of a program.
pidofproc() {
	local RC pid pid_file=

	# Test syntax.
	if [ "$#" = 0 ]; then
		echo $"Usage: pidofproc [-p pidfile] {program}"
		return 1
	fi
	if [ "$1" = "-p" ]; then
		pid_file=$2
		shift 2
	fi
	fail_code=3 # "Program is not running"

	# First try "/var/run/*.pid" files
	__pids_var_run "$1" "$pid_file"
	RC=$?
	if [ -n "$pid" ]; then
		echo $pid
		return 0
	fi

	[ -n "$pid_file" ] && return $RC
	__pids_pidof "$1" || return $RC
}

status() {
	local base pid lock_file= pid_file=

	# Test syntax.
	if [ "$#" = 0 ] ; then
		echo $"Usage: status [-p pidfile] {program}"
		return 1
	fi
	if [ "$1" = "-p" ]; then
		pid_file=$2
		shift 2
	fi
	if [ "$1" = "-l" ]; then
		lock_file=$2
		shift 2
	fi
	base=${1##*/}

	if [ "$_use_systemctl" = "1" ]; then
		systemctl status ${0##*/}.service
		ret=$?
		# LSB daemons that dies abnormally in systemd looks alive in systemd's eyes due to RemainAfterExit=yes
		# lets adjust the reality a little bit
		if systemctl show -p ActiveState ${0##*/}.service | grep -q '=active$' && \
		systemctl show -p SubState ${0##*/}.service | grep -q '=exited$' ; then
			ret=3
		fi
		return $ret
	fi

	# First try "pidof"
	__pids_var_run "$1" "$pid_file"
	RC=$?
	if [ -z "$pid_file" -a -z "$pid" ]; then
		pid="$(__pids_pidof "$1")"
	fi
	if [ -n "$pid" ]; then
	        echo $"${base} (pid $pid) is running..."
	        return 0
	fi

	case "$RC" in
		0)
			echo $"${base} (pid $pid) is running..."
			return 0
			;;
		1)
	                echo $"${base} dead but pid file exists"
	                return 1
			;;
		4)
			echo $"${base} status unknown due to insufficient privileges."
			return 4
			;;
	esac
	if [ -z "${lock_file}" ]; then
		lock_file=${base}
	fi
	# See if /var/lock/subsys/${lock_file} exists
	if [ -f /var/lock/subsys/${lock_file} ]; then
		echo $"${base} dead but subsys locked"
		return 2
	fi
	echo $"${base} is stopped"
	return 3
}

echo_success() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_SUCCESS
  echo -n $"  OK  "
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "\r"
  return 0
}

echo_failure() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_FAILURE
  echo -n $"FAILED"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "\r"
  return 1
}

echo_passed() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo -n $"PASSED"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "\r"
  return 1
}

echo_warning() {
  [ "$BOOTUP" = "color" ] && $MOVE_TO_COL
  echo -n "["
  [ "$BOOTUP" = "color" ] && $SETCOLOR_WARNING
  echo -n $"WARNING"
  [ "$BOOTUP" = "color" ] && $SETCOLOR_NORMAL
  echo -n "]"
  echo -ne "\r"
  return 1
}

# Inform the graphical boot of our current state
update_boot_stage() {
  if [ -x /bin/plymouth ]; then
      /bin/plymouth --update="$1"
  fi
  return 0
}

# Log that something succeeded
success() {
  [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_success
  return 0
}

# Log that something failed
failure() {
  local rc=$?
  [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_failure
  [ -x /bin/plymouth ] && /bin/plymouth --details
  return $rc
}

# Log that something passed, but may have had errors. Useful for fsck
passed() {
  local rc=$?
  [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_passed
  return $rc
}

# Log a warning
warning() {
  local rc=$?
  [ "$BOOTUP" != "verbose" -a -z "${LSB:-}" ] && echo_warning
  return $rc
}

# Run some action. Log its output.
action() {
  local STRING rc

  STRING=$1
  echo -n "$STRING "
  shift
  "$@" && success $"$STRING" || failure $"$STRING"
  rc=$?
  echo
  return $rc
}

# returns OK if $1 contains $2
strstr() {
  [ "${1#*$2*}" = "$1" ] && return 1
  return 0
}

# Check whether file $1 is a backup or rpm-generated file and should be ignored
is_ignored_file() {
    case "$1" in
	*~ | *.bak | *.orig | *.rpmnew | *.rpmorig | *.rpmsave)
	    return 0
	    ;;
    esac
    return 1
}

# Evaluate shvar-style booleans
is_true() {
    case "$1" in
	[tT] | [yY] | [yY][eE][sS] | [tT][rR][uU][eE])
	return 0
	;;
    esac
    return 1
}

# Evaluate shvar-style booleans
is_false() {
    case "$1" in
	[fF] | [nN] | [nN][oO] | [fF][aA][lL][sS][eE])
	return 0
	;;
    esac
    return 1
}

# Apply sysctl settings, including files in /etc/sysctl.d
apply_sysctl() {
    if [ -x /lib/systemd/systemd-sysctl ]; then
	/lib/systemd/systemd-sysctl
    else
        for file in /usr/lib/sysctl.d/*.conf ; do
            is_ignored_file "$file" && continue
            [ -f /run/sysctl.d/${file##*/} ] && continue
            [ -f /etc/sysctl.d/${file##*/} ] && continue
            test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
        done
        for file in /run/sysctl.d/*.conf ; do
            is_ignored_file "$file" && continue
            [ -f /etc/sysctl.d/${file##*/} ] && continue
            test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
        done
        for file in /etc/sysctl.d/*.conf ; do
            is_ignored_file "$file" && continue
            test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
        done
        sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
    fi
}

# A sed expression to filter out the files that is_ignored_file recognizes
__sed_discard_ignored_files='/\(~\|\.bak\|\.orig\|\.rpmnew\|\.rpmorig\|\.rpmsave\)$/d'

if [ "$_use_systemctl" = "1" ]; then
        if  [ "x$1" = xstart -o \
                "x$1" = xstop -o \
                "x$1" = xrestart -o \
                "x$1" = xreload -o \
                "x$1" = xtry-restart -o \
                "x$1" = xforce-reload -o \
                "x$1" = xcondrestart ] ; then

		systemctl_redirect $0 $1
		exit $?
	fi
fi

strstr "$(cat /proc/cmdline)" "rc.debug" && set -x
return 0