Hallo, dies ist ein Test.

PWD: /www/data-lst1/unixsoft/unixsoft/kaempfer/.public_html

Running in File Mode
Relative path: ./../../../../../../usr/sbin/swapadd
Real path: /usr/sbin/swapadd
Zurück

#!/bin/ksh
#
# Copyright (c) 1991, 2023, Oracle and/or its affiliates.
#
# Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T
# All rights reserved.
#

. /lib/svc/share/smf_include.sh

# Set noinuse checking during boot. We want to disable device in use checking
# so that normal swap use, such as specified in /etc/vfstab, will not cause
# swap devices to fail to be configured during boot.
NOINUSE_CHECK=1; export NOINUSE_CHECK

typeset -r ZVOL_LABEL="swap"

PATH=/usr/sbin:/usr/bin; export PATH
USAGE="Usage: swapadd [-12] [file_system_table]"

VFSTAB=/etc/vfstab	# Default file system table
PASS=2			# Default to checking for existing swap
STATUS=0
UPGRADE=0

warn()
{
	echo "WARNING: $*" >& 2
}

die()
{
	echo "$*" >& 2
	exit 1
}

swap_added()
{
	swap -l 2>/dev/null | grep '^\<'$1'\>' >/dev/null 2>&1
}

add_swap()
{
	typeset PASS=$1
	typeset special=$2
	typeset ospecial=$special
	typeset zvol=${special#/dev/zvol/dsk/}
	typeset tflag=""

if [ "$special" != "$zvol" ]; then
		keystatus=$(zfs get -H -o value keystatus $zvol 2>/dev/null)
		if [ "$keystatus" == "unavailable" ]; then
			zfs key -l $zvol
		fi
		tflag=" -t"
	else
		#
		# zfs volumes used for swap are always encrypted without
		# any special setup, just deal with raw devices.
		#
		special=$(lofiadm -c aes-256-cbc -e -a $special 2> /dev/null)
		if (( $? == 1 )); then
			special=$(lofiadm $ospecial)
			if (( $? != 0)); then
				# During PASS 1 $ospecial could be an NFS file
				# that is not yet mounted so ignore the error.
				if (( $PASS == 2 )); then
					STATUS=1
				fi
				continue
			fi
		fi
	fi

if (( $PASS == 1 )); then
		#
		# Check to see if there is a crash dump on this volume.
		# If there is then this swap volume will be added by
		# pass2
		#
		# For lofi devices this has to check the underlying
		# device for a dump as the lofi device has an ephemeral
		# key.
		#
		savecore -c -f $ospecial > /dev/null 2>&1
		if (( $? == 2 )); then
			echo "Skipping $special: contains a crash dump" >&2
			continue
		fi
	fi
	#
	# Skip all the swap already added.  If something added earlier uses the
	# same name as something to be added later, the following test won't
	# work. This should only happen if parts of a particular swap file are
	# added or deleted by hand between invocations.
	#
	if swap_added ${special}; then
		return
	fi
	#
	# If adding a swap device takes a long time to complete
	# for some reason, SMF will timeout, kill and restart
	# this service. The swap command may continue to run.
	# Check for this and wait for the swap command to
	# complete, instead of starting another one.
	#
	pid=$(pgrep -f "swap -$PASS$tflag -a $special")
	if (( $? == 1)); then
		if ! swap -$PASS$tflag -a $special >/dev/null; then
			STATUS=1
		fi
	else
		pwait $pid
		if ! swap_added ${special}; then
			STATUS=1
		fi
	fi
}

vfstab_hasswap()
{
	while read special t1 t2 fstype t3 t4 options; do
		#
		# Ignore comments, empty lines, and no-action lines
		#
		case "$special" in
		'#'* | '' | '-') continue ;;
		esac

#
		# Ignore non-swap fstypes
		#
		[ "$fstype" == swap ] && return 0
	done
	return 1
}

edit_vfstab() 
{
	typeset swapcomment="# ZFS swap volumes are permanently added via swap -a. See swap(8)\n# "
	typeset special t1 t2 fstype t3 t4 flags
	typeset has_swap_property="${1}"

while read line; do
		#
		# Ignore comments, empty lines, and no-action lines
		#
		case "$line" in
		'#'* | '' | '-') echo "$line" ; continue ;;
		esac
		echo "$line" | read special t1 t2 fstype t3 t4 flags
		if [ "$fstype" == swap ]; then
			typeset zvolname=${special#/dev/zvol/dsk/}
			if [[ $zvolname != $special ]]; then
				#
				# If any of the volumes have a swap property set
				# to anything other then "none" then only remove
				# swap entries marked "install"
				#
				if [[ "${has_swap_property}" == "true" ]]; then
				        if [[ $(zfs list -Ho ${ZVOL_LABEL} $zvolname ) == "on" ]]; then
						continue;
					fi
				elif zfs set ${ZVOL_LABEL}=on $zvolname ; then
					if [[ "$flags" == "install" ]]; then
						continue
					fi
					echo "$swapcomment\c" && swapcomment="# "
				else
					return 1
				fi
			fi
		fi
		echo "$line"
	done
	return 0
}

all_kvol_swap_none()
{
	zfs list -t volume -Ho name,$ZVOL_LABEL | while read vol isswap; do
		[[ $isswap != "none" ]] && return 0
	done
	return 1
}

while getopts 12U opt; do
	case "$opt" in
	1|2) PASS=$opt ;;
	U) UPGRADE=1 ;;
	 \?) die "$USAGE" ;;
	esac
done
shift $(( $OPTIND - 1 ))

(( $# > 1 )) && die "$USAGE"
(( $# == 1 )) && VFSTAB="$1"

if (( UPGRADE == 1)); then
	has_swap_property=false
	if [ "x$VFSTAB" == x- ]; then
		die "can not upgrade standard in"
	fi
	if [[ $(getconf _SC_SUNW_FEATURE_AK) == 1 ]]; then
		exit 0
	fi
	TMPFILE=$VFSTAB.new
	if ! vfstab_hasswap < $VFSTAB; then
		exit 0
	fi
	if all_kvol_swap_none; then
		has_swap_property=true
	fi
	if edit_vfstab $has_swap_property < $VFSTAB > $TMPFILE ; then
		mv -S $TMPFILE $VFSTAB && exit 0
	fi
	rm -f $TMPFILE
	exit $SMF_EXIT_DEGRADED
fi

#
# First handle any swap volumes that have the property set to on
#
zfs list -t volume -Ho name,$ZVOL_LABEL | while read vol isswap; do
	if [[ $isswap == "on" ]]; then
		add_swap $PASS /dev/zvol/dsk/$vol
	fi
done

#
# If $VFSTAB is not "-" (stdin), re-open stdin as the specified file
#
if [ "x$VFSTAB" != x- ]; then
	[ -s "$VFSTAB" ] || die "swapadd: file system table ($VFSTAB) not found"
	exec <$VFSTAB
fi

#
# Read the file system table to find entries of file system type "swap".
# Add the swap device or file specified in the first column.
#
while read special t1 t2 fstype t3 t4 options; do
	#
	# Ignore comments, empty lines, and no-action lines
	#
	case "$special" in
	'#'* | '' | '-') continue ;;
	esac

#
	# Ignore non-swap fstypes
	#
	[ "$fstype" != swap ] && continue
	zvolname=${special#/dev/zvol/dsk/}
	if [[ $zvolname != $special ]]; then
		typeset prop=$(zfs get -Ho value $ZVOL_LABEL $zvolname)
		if [[ $prop != "none" ]];then
			warn "ZFS swap volume \"$zvolname\" in $VFSTAB has $ZVOL_LABEL property set: $prop"
			warn "please remove it from $VFSTAB. See swap(8)."
			#
			# Only put the service into degraded mode if swap has
			# been disabled on this volume
			#
			if [[ $prop == "off" ]]; then
				STATUS=$SMF_EXIT_DEGRADED
			fi
			continue
		fi
	fi

add_swap $PASS $special
done
exit $STATUS