mirror of
git://sourceware.org/git/lvm2.git
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263 lines
6.5 KiB
Bash
263 lines
6.5 KiB
Bash
#!/bin/bash
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#
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# Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
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#
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# This file is part of the lvm2 package.
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#
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# This copyrighted material is made available to anyone wishing to use,
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# modify, copy, or redistribute it subject to the terms and conditions
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# of the GNU General Public License v.2.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Edit an lvm.conf file to adjust various properties
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#
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function usage
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{
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echo "usage: $0 <command>"
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echo ""
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echo "Commands:"
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echo "Enable clvm: --enable-cluster [--lockinglibdir <dir>] [--lockinglib <lib>]"
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echo "Disable clvm: --disable-cluster"
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echo "Set locking library: --lockinglibdir <dir> [--lockinglib <lib>]"
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echo ""
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echo "Global options:"
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echo "Config file location: --file <configfile>"
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echo ""
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}
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function parse_args
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{
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while [ -n "$1" ]; do
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case $1 in
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--enable-cluster)
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LOCKING_TYPE=3
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shift
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;;
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--disable-cluster)
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LOCKING_TYPE=1
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shift
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;;
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--lockinglibdir)
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if [ -n "$2" ]; then
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LOCKINGLIBDIR=$2
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shift 2
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else
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usage
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exit 1
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fi
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;;
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--lockinglib)
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if [ -n "$2" ]; then
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LOCKINGLIB=$2
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shift 2
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else
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usage
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exit 1
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fi
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;;
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--file)
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if [ -n "$2" ]; then
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CONFIGFILE=$2
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shift 2
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else
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usage
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exit 1
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fi
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;;
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*)
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usage
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exit 1
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esac
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done
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}
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function validate_args
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{
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[ -z "$CONFIGFILE" ] && CONFIGFILE="/etc/lvm/lvm.conf"
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if [ ! -f "$CONFIGFILE" ]
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then
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echo "$CONFIGFILE does not exist"
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exit 10
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fi
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if [ -z "$LOCKING_TYPE" ] && [ -z "$LOCKINGLIBDIR" ]; then
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usage
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exit 1
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fi
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if [ -n "$LOCKINGLIBDIR" ]; then
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if [ "${LOCKINGLIBDIR:0:1}" != "/" ]
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then
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echo "Prefix must be an absolute path name (starting with a /)"
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exit 12
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fi
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if [ -n "$LOCKINGLIB" ] && [ ! -f "$LOCKINGLIBDIR/$LOCKINGLIB" ]
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then
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echo "$LOCKINGLIBDIR/$LOCKINGLIB does not exist, did you do a \"make install\" ?"
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exit 11
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fi
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fi
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if [ "$LOCKING_TYPE" = "1" ] && [ -n "$LOCKINGLIBDIR" -o -n "$LOCKINGLIB" ]; then
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echo "Superfluous locking lib parameter, ignoring"
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fi
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}
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umask 0077
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parse_args "$@"
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validate_args
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SCRIPTFILE=/etc/lvm/.lvmconf-script.tmp
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TMPFILE=/etc/lvm/.lvmconf-tmp.tmp
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# Flags so we know which parts of the file we can replace and which need
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# adding. These are return codes from grep, so zero means it IS present!
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have_type=1
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have_dir=1
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have_library=1
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have_global=1
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grep -q '^[[:blank:]]*locking_type[[:blank:]]*=' $CONFIGFILE
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have_type=$?
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grep -q '^[[:blank:]]*library_dir[[:blank:]]*=' $CONFIGFILE
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have_dir=$?
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grep -q '^[[:blank:]]*locking_library[[:blank:]]*=' $CONFIGFILE
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have_library=$?
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# Those options are in section "global {" so we must have one if any are present.
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if [ "$have_type" = "0" -o "$have_dir" = "0" -o "$have_library" = "0" ]
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then
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# See if we can find it...
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grep -q '^[[:blank:]]*global[[:blank:]]*{' $CONFIGFILE
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have_global=$?
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if [ "$have_global" = "1" ]
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then
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echo "global keys but no 'global {' found, can't edit file"
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exit 13
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fi
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fi
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if [ "$LOCKING_TYPE" = "2" ] && [ -z "$LOCKINGLIBDIR" ] && [ "$have_dir" = "1" ]; then
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echo "no library_dir specified in $CONFIGFILE"
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exit 16
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fi
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# So if we don't have "global {" we need to create one and
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# populate it
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if [ "$have_global" = "1" ]
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then
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if [ -z "$LOCKING_TYPE" ]; then
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LOCKING_TYPE=1
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fi
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if [ "$LOCKING_TYPE" = "3" ] || [ "$LOCKING_TYPE" = "2" ]; then
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cat $CONFIGFILE - <<EOF > $TMPFILE
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global {
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# Enable locking for cluster LVM
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locking_type = $LOCKING_TYPE
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library_dir = "$LOCKINGLIBDIR"
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EOF
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if [ $? != 0 ]
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then
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echo "failed to create temporary config file, $CONFIGFILE not updated"
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exit 14
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fi
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if [ -n "$LOCKINGLIB" ]; then
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cat - <<EOF >> $TMPFILE
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locking_library = "$LOCKINGLIB"
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EOF
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if [ $? != 0 ]
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then
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echo "failed to create temporary config file, $CONFIGFILE not updated"
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exit 16
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fi
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fi
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cat - <<EOF >> $TMPFILE
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}
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EOF
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fi # if we aren't setting cluster locking, we don't need to create a global section
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if [ $? != 0 ]
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then
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echo "failed to create temporary config file, $CONFIGFILE not updated"
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exit 17
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fi
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else
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#
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# We have a "global {" section, so add or replace the
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# locking entries as appropriate
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#
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if [ -n "$LOCKING_TYPE" ]; then
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if [ "$have_type" = "0" ]
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then
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SEDCMD=" s/^[[:blank:]]*locking_type[[:blank:]]*=.*/\ \ \ \ locking_type = $LOCKING_TYPE/g"
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else
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SEDCMD=" /global[[:blank:]]*{/a\ \ \ \ locking_type = $LOCKING_TYPE"
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fi
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fi
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if [ -n "$LOCKINGLIBDIR" ]; then
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if [ "$have_dir" = "0" ]
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then
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SEDCMD="${SEDCMD}\ns'^[[:blank:]]*library_dir[[:blank:]]*=.*'\ \ \ \ library_dir = \"$LOCKINGLIBDIR\"'g"
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else
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SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ library_dir = \"$LOCKINGLIBDIR\""
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fi
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fi
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if [ -n "$LOCKINGLIB" ]; then
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if [ "$have_library" = "0" ]
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then
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SEDCMD="${SEDCMD}\ns/^[[:blank:]]*locking_library[[:blank:]]*=.*/\ \ \ \ locking_library = \"$LOCKINGLIB\"/g"
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else
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SEDCMD="${SEDCMD}\n/global[[:blank:]]*{/a\ \ \ \ locking_library = \"$LOCKINGLIB\""
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fi
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fi
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echo -e $SEDCMD > $SCRIPTFILE
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sed <$CONFIGFILE >$TMPFILE -f $SCRIPTFILE
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if [ $? != 0 ]
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then
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echo "sed failed, $CONFIGFILE not updated"
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exit 15
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fi
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fi
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# Now we have a suitably editted config file in a temp place,
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# backup the original and copy our new one into place.
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cp $CONFIGFILE $CONFIGFILE.lvmconfold
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if [ $? != 0 ]
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then
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echo "failed to backup old config file, $CONFIGFILE not updated"
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exit 2
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fi
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cp $TMPFILE $CONFIGFILE
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if [ $? != 0 ]
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then
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echo "failed to copy new config file into place, check $CONFIGFILE is still OK"
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exit 3
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fi
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rm -f $SCRIPTFILE $TMPFILE
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