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