RHEL 6 /etc/rc.d/init.d/functions from initscripts-9.03.61-1.el6.centos.x86_64

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

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

[ -z "${CONSOLETYPE:-}" ] && CONSOLETYPE="$(/sbin/consoletype)"

if [ -f /etc/sysconfig/i18n -a -z "${NOLOCALE:-}" -a -z "${LANGSH_SOURCED:-}" ] ; 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 "${BOOTUP:-}" ]; then
  if [ -f /etc/sysconfig/init ]; then
      . /etc/sysconfig/init
  else
    # This all seem confusing? Look in /etc/sysconfig/init,
    # or in /usr/doc/initscripts-*/sysconfig.txt
    BOOTUP=color
    RES_COL=60
    MOVE_TO_COL="echo -en \\033[${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

# Interpret escape sequences in an fstab entry
fstab_decode_str() {
	fstab-decode echo "$1"
}

# 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
}

__readlink() {
    ls -bl "$@" 2>/dev/null| awk '{ print $NF }'
}

__fgrep() {
    s=$1
    f=$2
    while read line; do
	if strstr "$line" "$s"; then
	    echo $line
	    return 0
	fi
    done < $f
    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 || continue

        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=
    local base_stime=

    # We can't initialize stat & base_stime on the same line where 'local'
    # keyword is, otherwise the sourcing of this file will fail for ksh...
    stat=($(< /proc/self/stat))
    base_stime=${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
}

# __umount_loop awk_program fstab_file first_msg retry_msg retry_umount_args
# awk_program should process fstab_file and return a list of fstab-encoded
# paths; it doesn't have to handle comments in fstab_file.
__umount_loop() {
	local remaining sig=
	local retry=3 count

	remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
	while [ -n "$remaining" -a "$retry" -gt 0 ]; do
		if [ "$retry" -eq 3 ]; then
			action "$3" fstab-decode umount $remaining
		else
			action "$4" fstab-decode umount $5 $remaining
		fi
		count=4
		remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
		while [ "$count" -gt 0 ]; do
			[ -z "$remaining" ] && break
			count=$(($count-1))
			usleep 500000
			remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
		done
		[ -z "$remaining" ] && break
		kill $sig $(fstab-decode /sbin/fuser -m $remaining 2>/dev/null  | sed -e "s/\b$$\b//g") > /dev/null
		sleep 3
		retry=$(($retry -1))
		sig=-9
	done
}

# Similar to __umount loop above, without calling fuser
__umount_loop_2() {
    local remaining=
    local count
    local kill_list

    #call regular umount
	remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
	action "$3" fstab-decode umount $remaining

	count=4
	remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
        while [ "$count" -gt 0 ]; do
                [ -z "$remaining" ] && break
                count=$(($count-1))
                usleep 500000
                remaining=$(LC_ALL=C awk "/^#/ {next} $1" "$2" | sort -r)
        done
	[ -z "$remaining" ] && return 0

	devs=$(stat -c "%d" $remaining)
	action "$4" fstab-decode umount "-l" $remaining

    # find fds that don't start with /, are not sockets or pipes or other.
	# these are potentially detached fds
	detached_fds=$(find /proc/ -regex '/proc/[0-9]+/fd/.*' -printf "%p %l\n" 2>/dev/null |\
			 grep -Ev '/proc/[0-9]+/fd/[0-9]+ (/.*|inotify|\[.+\]|(socket|pipe):\[[0-9]+\])')

	# check each detached fd to see if it has the same device
	# as one of our lazy umounted filesystems
	kill_list=
	[ -n "$detached_fds" ] && while read fdline; do
		fd=${fdline%% *}
		pid=$(echo $fdline | sed -r 's/\/proc\/([0-9]+).+/\1/')
		fd_dev=$(stat -L -c "%d" $fd)
		for dev in $devs ; do
			[ "$dev" = "$fd_dev" ] && kill_list+="$pid "
		done
	done <<< "$detached_fds"

	if [ -n "$kill_list" ] ; then
		STRING=$"Killing processes with open filedescriptors on the unmounted disk:"
		__kill_pids_term_kill $kill_list && success "$STRING" || failure "$STRING"
		echo
    fi
}

__source_netdevs_fstab() {
        NFSFSTAB=$(LC_ALL=C awk '!/^#/ && $3 ~ /^nfs/ && $3 != "nfsd" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
        CIFSFSTAB=$(LC_ALL=C awk '!/^#/ && $3 == "cifs" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
        NCPFSTAB=$(LC_ALL=C awk '!/^#/ && $3 == "ncpfs" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
        GLUSTERFSFSTAB=$(LC_ALL=C awk '!/^#/ && $3 == "glusterfs" && $4 !~ /noauto/ { print $2 }' /etc/fstab)
        NETDEVFSTAB=$(LC_ALL=C awk '!/^#/ && $4 ~/_netdev/ && $4 !~ /noauto/ { print $1 }' /etc/fstab)
}

__source_netdevs_mtab() {
        NFSMTAB=$(LC_ALL=C awk '$3 ~ /^nfs/ && $3 != "nfsd" && $2 != "/" { print $2 }' /proc/mounts)
        CIFSMTAB=$(LC_ALL=C awk '$3 == "cifs" { print $2 }' /proc/mounts)
        NCPMTAB=$(LC_ALL=C awk '$3 == "ncpfs" { print $2 }' /proc/mounts)
        GLUSTERFSMTAB=$(LC_ALL=C awk '$3 == "fuse.glusterfs" { print $2 }' /proc/mounts)
        NETDEVMTAB=$(LC_ALL=C awk '$4 ~ /_netdev/ && $2 != "/" { print $2 }' /etc/mtab)

        ALLNETDEVMTAB="$NFSMTAB $CIFSMTAB $NCPMTAB $GLUSTERFSMTAB $NETDEVMTAB"
}

# Similar to __umount loop above, specialized for loopback devices
__umount_loopback_loop() {
	local remaining devremaining sig=
	local retry=3

        __find_mounts() {
                if [ "$1" = "--netdev" ] ; then
                       __source_netdevs_mtab
                       remaining=
                       devremaining=
                       local mount= netdev= _rest
                       while read -r dev mount _rest ; do
                               [ "$dev" = "${dev##/dev/loop}" ] && continue
                               local back_file=$(losetup $dev | sed -e 's/^\/dev\/loop[0-9]\+: \[[0-9a-f]\+\]:[0-9]\+ (\(.*\))$/\1/')
                               for netdev in $ALLNETDEVMTAB ; do
                                        local netdev_decoded=
                                        netdev="${netdev}/"
                                        netdev_decoded=$(fstab_decode_str ${netdev})
                                        if [ "$mount" != "${mount##$netdev}" ] || [ "$back_file" != "${back_file##$netdev_decoded}" ] ; then
                                                remaining="$remaining $mount"
                                                #device might be mounted in other location,
                                                #but then losetup -d will be noop, so meh
                                                devremaining="$devremaining $dev"
                                                continue 2
                                        fi
                               done
                        done < /proc/mounts
                else
                        remaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $2}' /proc/mounts)
                        devremaining=$(awk '$1 ~ /^\/dev\/loop/ && $2 != "/" {print $1}' /proc/mounts)
                fi
        }

        __find_mounts $1

	while [ -n "$remaining" -a "$retry" -gt 0 ]; do
		if [ "$retry" -eq 3 ]; then
			action $"Unmounting loopback filesystems: " \
				fstab-decode umount $remaining
		else
			action $"Unmounting loopback filesystems (retry):" \
				fstab-decode umount $remaining
		fi
                
		for dev in $devremaining ; do
                        if [ "$1" = "--netdev" ] ; then
                                #some loopdevices might be mounted on top of non-netdev
                                #so ignore failures
                                losetup -d $dev > /dev/null 2>&1 
                        else
                                losetup $dev > /dev/null 2>&1 && \
                                        action $"Detaching loopback device $dev: " \
                                        losetup -d $dev
                fi
                done
                #check what is still mounted
                __find_mounts $1
		[ -z "$remaining" ] && break
		fstab-decode /sbin/fuser -k -m $sig $remaining >/dev/null
		sleep 3
		retry=$(($retry -1))
		sig=-9
	done
}

# __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)
	local binary=$3

	[ -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 $line ; do
				if [ -z "${p//[0-9]/}" -a -d "/proc/$p" ] ; then
					if [ -n "$binary" ] ; then
						local b=$(readlink /proc/$p/exe | sed -e 's/\s*(deleted)$//')
						[ "$b" != "$binary" ] && continue
					fi
					pid="$pid $p"
				fi
			done
		done < "$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 binary=

	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" = "-b" ]; then
		if [ -z $pid_file ]; then
			echo $"-b option can be used only with -p"
			echo $"Usage: killproc -p pidfile -b binary program"
			return 1
		fi
		binary=$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" "$binary"
	RC=$?
	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= binary=

	# 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
	if [ "$1" = "-b" ]; then
		if [ -z $pid_file ]; then
			echo $"-b option can be used only with -p"
			echo $"Usage: status -p pidfile -b binary program"
			return 1
		fi
		binary=$2
		shift 2
	fi
	base=${1##*/}

	# First try "pidof"
	__pids_var_run "$1" "$pid_file" "$binary"
	RC=$?
	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
}

# Run some action. Silently.
action_silent() {
  local STRING rc

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

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

# Confirm whether we really want to run this service
confirm() {
  [ -x /bin/plymouth ] && /bin/plymouth --hide-splash
  while : ; do
      echo -n $"Start service $1 (Y)es/(N)o/(C)ontinue? [Y] "
      read answer
      if strstr $"yY" "$answer" || [ "$answer" = "" ] ; then
         return 0
      elif strstr $"cC" "$answer" ; then
	 rm -f /var/run/confirm
	 [ -x /bin/plymouth ] && /bin/plymouth --show-splash
         return 2
      elif strstr $"nN" "$answer" ; then
         return 1
      fi
  done
}

# resolve a device node to its major:minor numbers in decimal or hex
get_numeric_dev() {
(
    fmt="%d:%d"
    if [ "$1" == "hex" ]; then
        fmt="%x:%x"
    fi
    ls -lH "$2" | awk '{ sub(/,/, "", $5); printf("'"$fmt"'", $5, $6); }'
) 2>/dev/null
}

# 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] | 1)
	return 0
	;;
    esac
    return 1
}

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

# Apply sysctl settings, including files in /etc/sysctl.d
apply_sysctl() {
    sysctl -e -p /etc/sysctl.conf >/dev/null 2>&1
    for file in /etc/sysctl.d/* ; do
        is_ignored_file "$file" && continue
        test -f "$file" && sysctl -e -p "$file" >/dev/null 2>&1
    done
}

key_is_random() {
    [ "$1" = "/dev/urandom" -o "$1" = "/dev/hw_random" \
	-o "$1" = "/dev/random" ]
}

find_crypto_mount_point() {
    local fs_spec fs_file fs_vfstype remaining_fields
    local fs
    while read fs_spec fs_file remaining_fields; do
	if [ "$fs_spec" = "/dev/mapper/$1" ]; then
	    echo $fs_file
	    break;
	fi
    done < /etc/fstab
}

# Because of a chicken/egg problem, init_crypto must be run twice.  /var may be
# encrypted but /var/lib/random-seed is needed to initialize swap.
init_crypto() {
    local have_random dst src key opt mode owner params makeswap skip arg opt
    local param value rc ret mke2fs mdir prompt mount_point

    ret=0
    have_random=$1
    while read dst src key opt; do
	[ -z "$dst" -o "${dst#\#}" != "$dst" ] && continue
        [ -b "/dev/mapper/$dst" ] && continue;
	if [ "$have_random" = 0 ] && key_is_random "$key"; then
	    continue
	fi
	if [ -n "$key" -a "x$key" != "xnone" ]; then
	    if test -e "$key" ; then
		owner=$(ls -l $key | (read a b owner rest; echo $owner))
		if ! key_is_random "$key"; then
		    mode=$(ls -l "$key" | cut -c 5-10)
		    if [ "$mode" != "------" ]; then
		       echo $"INSECURE MODE FOR $key"
		    fi
		fi
		if [ "$owner" != root ]; then
		    echo $"INSECURE OWNER FOR $key"
		fi
	    else
		echo $"Key file for $dst not found, skipping"
		ret=1
		continue
	    fi
	else
	    key=""
	fi
	params=""
	makeswap=""
	mke2fs=""
	skip=""
	# Parse the src field for UUID= and convert to real device names
	if [ "${src%%=*}" == "UUID" ]; then
		src=$(/sbin/blkid -t "$src" -l -o device)
	elif [ "${src/^\/dev\/disk\/by-uuid\/}" != "$src" ]; then
		src=$(__readlink $src)
	fi
	# Is it a block device?
	[ -b "$src" ] || continue
	# Is it already a device mapper slave? (this is gross)
	devesc=${src##/dev/}
	devesc=${devesc//\//!}
	for d in /sys/block/dm-*/slaves ; do
	    [ -e $d/$devesc ] && continue 2
	done
	# Parse the options field, convert to cryptsetup parameters and
	# contruct the command line
	while [ -n "$opt" ]; do
	    arg=${opt%%,*}
	    opt=${opt##$arg}
	    opt=${opt##,}
	    param=${arg%%=*}
	    value=${arg##$param=}

	    case "$param" in
	    cipher)
		params="$params -c $value"
		if [ -z "$value" ]; then
		    echo $"$dst: no value for cipher option, skipping"
		    skip="yes"
		fi
	    ;;
	    size)
		params="$params -s $value"
		if [ -z "$value" ]; then
		    echo $"$dst: no value for size option, skipping"
		    skip="yes"
		fi
	    ;;
	    hash)
		params="$params -h $value"
		if [ -z "$value" ]; then
		    echo $"$dst: no value for hash option, skipping"
		    skip="yes"
		fi
	    ;;
	    verify)
	        params="$params -y"
	    ;;
	    swap)
		makeswap=yes
		;;
	    tmp)
		mke2fs=yes
	    esac
	done
	if [ "$skip" = "yes" ]; then
	    ret=1
	    continue
	fi
	if [ -z "$makeswap" ] && cryptsetup isLuks "$src" 2>/dev/null ; then
	    if key_is_random "$key"; then
		echo $"$dst: LUKS requires non-random key, skipping"
		ret=1
		continue
	    fi
	    if [ -n "$params" ]; then
		echo "$dst: options are invalid for LUKS partitions," \
		    "ignoring them"
	    fi
	    if [ -n "$key" ]; then
		/sbin/cryptsetup -d $key luksOpen "$src" "$dst" <&1 2>/dev/null && success || failure
		rc=$?
	    else
		mount_point="$(find_crypto_mount_point $dst)"
		[ -n "$mount_point" ] || mount_point=${src##*/}
		prompt=$(printf $"%s is password protected" "$mount_point")
		plymouth ask-for-password --prompt "$prompt" --command="/sbin/cryptsetup luksOpen -T1 $src $dst" <&1
		rc=$?
	    fi
	else
	    [ -z "$key" ] && plymouth --hide-splash
	    /sbin/cryptsetup $params ${key:+-d $key} create "$dst" "$src" <&1 && success || failure
	    rc=$?
	    [ -z "$key" ] && plymouth --show-splash
	fi
	if [ $rc -ne 0 ]; then
	    ret=1
	    continue
	fi
	if [ -b "/dev/mapper/$dst" ]; then
	    if [ "$makeswap" = "yes" ]; then
		mkswap "/dev/mapper/$dst" 2>/dev/null >/dev/null
	    fi
	    if [ "$mke2fs" = "yes" ]; then
		if mke2fs "/dev/mapper/$dst" 2>/dev/null >/dev/null \
		    && mdir=$(mktemp -d /tmp/mountXXXXXX); then
		    mount "/dev/mapper/$dst" "$mdir" && chmod 1777 "$mdir"
		    umount "$mdir"
		    rmdir "$mdir"
		fi
	    fi
	fi
    done < /etc/crypttab
    return $ret
}

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

#if we have privileges lets log to kmsg, otherwise to stderr
if strstr "$(cat /proc/cmdline)" "rc.debug"; then
        [ -w /dev/kmsg ] && exec 30>/dev/kmsg && BASH_XTRACEFD=30
        set -x
fi