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ucf
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#!/bin/sh
# -*- Mode: Sh -*-
# ucfr ---
# Author : Manoj Srivastava ( srivasta@glaurung.internal.golden-gryphon.com )
# Created On : Tue Apr 11 11:09:15 2006
# Created On Node : glaurung.internal.golden-gryphon.com
# Last Modified By : Manoj Srivastava
# Last Modified On : Tue Apr 11 13:50:58 2006
# Last Machine Used: glaurung.internal.golden-gryphon.com
# Update Count : 43
# Status : Unknown, Use with caution!
# HISTORY :
# Description :
#
# Register a configuration file as belonging to a package
#
# arch-tag: 6e1d33fe-a930-41ce-8d0f-c87f87b19918
#
# make sure we exit on error
set -e
# set the version and revision
progname=$(basename "$0")
pversion='Revision 3.00'
######################################################################
######## #########
######## Utility functions #########
######## #########
######################################################################
setq() {
# Variable Value Doc_string
if [ "x$2" = "x" ]; then
echo >&2 "$progname: Unable to determine $3"
exit 1;
else
if [ "x$VERBOSE" != "x" ]; then
echo >&2 "$progname: $3 is $2";
fi
eval "$1=\"\$2\"";
fi
}
withecho () {
echo "$@" >&2
"$@"
}
purge_from_registry () {
if [ ! -e "$statedir/registry" ]; then
echo >&2 "$progname: Internal error: $statedir/registry does not exist";
exit 6;
fi
if [ "$count" -eq 0 ]; then
if [ "X$VERBOSE" != "X" ]; then
echo >&2 "$progname: Association already purged. No changes.";
fi
exit 0;
fi
old_pkg=$(grep -E "[[:space:]]${real_conf_file_re}$" "$statedir/registry" | \
awk '{print $1;}' );
if [ "$pkg" != "$old_pkg" ]; then
echo >&2 "ucfr: Association belongs to $old_pkg, not $pkg";
if [ "X$FORCE" = "X" ]; then
echo >&2 "ucfr: Aborting";
exit 5;
fi
fi
# OK, so we have something to purge.
for i in $(/usr/bin/seq 6 -1 0); do
if [ -e "${statedir}/registry.${i}" ]; then
if [ "X$docmd" = "XYES" ]; then
cp -f "${statedir}/registry.${i}" "${statedir}/registry.$(($i + 1))"
else
echo cp -f "${statedir}/registry.${i}" "${statedir}/registry.$(($i + 1))"
fi
fi
done
if [ "X$docmd" = "XYES" ]; then
cp -f "$statedir/registry" "$statedir/registry.0"
else
echo cp -f "$statedir/registry" "$statedir/registry.0"
fi
if [ "X$docmd" = "XYES" ]; then
set +e
if [ "X$VERBOSE" != "X" ]; then
echo "grep -Ev [[:space:]]${real_conf_file_re}$ $statedir/registry >\\"
echo " $statedir/registry.tmp || true";
fi
#echo "grep -Ev [[:space:]]${real_conf_file_re}$ $statedir/registry"
grep -Ev "[[:space:]]${real_conf_file_re}$" "$statedir/registry" > \
"$statedir/registry.tmp" || true;
if [ "X$docmd" = "XYES" ]; then
mv -f "$statedir/registry.tmp" "$statedir/registry"
else
echo mv -f "$statedir/registry.tmp" "$statedir/registry"
fi
set -e
fi
}
replace_in_registry () {
if [ ! -e "$statedir/registry" ]; then
echo >&2 "$progname: Internal error: $statedir/registry does not exist";
exit 6;
fi
if [ "$count" -eq 1 ]; then
old_pkg=$(grep -E "[[:space:]]${real_conf_file_re}$" "$statedir/registry" | \
awk '{print $1;}' );
if [ "$pkg" != "$old_pkg" ]; then
divert_package=$(dpkg-divert --listpackage "$conf_file")
if [ -n "$divert_package" ]; then
if [ "X$VERBOSE" != "X" ]; then
echo >&2 "$progname: Package $pkg will not take away diverted ${conf_file} from package $divert_package";
fi
exit 0;
else
if [ "X$FORCE" = "X" ]; then
echo >&2 "$progname: Attempt from package $pkg to take ${real_conf_file} away from package $old_pkg";
echo >&2 "ucfr: Aborting.";
exit 4;
fi
fi
else
if [ "X$VERBOSE" != "X" ]; then
echo >&2 "$progname: Association already recorded. No changes.";
fi
exit 0;
fi
fi
for i in $(/usr/bin/seq 6 -1 0); do
if [ -e "${statedir}/registry.${i}" ]; then
if [ "X$docmd" = "XYES" ]; then
cp -f "${statedir}/registry.${i}" \
"${statedir}/registry.$(($i + 1))"
else
echo cp -f "${statedir}/registry.${i}" \
"${statedir}/registry.$(($i + 1))"
fi
fi
done
if [ "X$docmd" = "XYES" ]; then
cp -f "$statedir/registry" "$statedir/registry.0"
else
echo cp -f "$statedir/registry" "$statedir/registry.0"
fi
if [ "X$docmd" = "XYES" ]; then
set +e
if [ "X$VERBOSE" != "X" ]; then
echo "grep -Ev \"[[:space:]]${real_conf_file_re}$\" \"$statedir/registry\" \\"
echo " $statedir/registry.tmp || true"
echo "echo \"$pkg $real_conf_file\" >> \"$statedir/registry.tmp\""
echo "mv -f $statedir/registry.tmp $statedir/registry"
fi
grep -Ev "[[:space:]]${real_conf_file_re}$" "$statedir/registry" > \
"$statedir/registry.tmp" || true;
echo "$pkg $real_conf_file" >> "$statedir/registry.tmp";
mv -f "$statedir/registry.tmp" "$statedir/registry"
set -e
else
echo "grep -Ev \"[[:space:]]${real_conf_file_re}$\" \"$statedir/registry\" \\"
echo " $statedir/registry.tmp || true"
echo "echo \"$pkg $real_conf_file\" >> \"$statedir/registry.tmp\""
echo "mv -f $statedir/registry.tmp $statedir/registry"
fi
}
usageversion () {
cat >&2 <<END
Debian GNU/Linux $progname $pversion.
Copyright (C) 2002-2006 Manoj Srivastava.
This is free software; see the GNU General Public Licence for copying
conditions. There is NO warranty.
Usage: $progname [options] package_name path_for_configuration_file
Options:
-h, --help print this message
-f --force Force the association, even if another package
used to own the configuration file.
-d [n], --debug [n] Set the Debug level to N
-n, --no-action Dry run. No action is actually taken.
-v, --verbose Make the script verbose
-p, --purge Remove any reference to the package/file association
from the records
--state-dir bar Set the state directory to bar instead of the
default '/var/lib/ucf'. Used mostly for testing.
END
}
######################################################################
######## #########
######## Command line args #########
######## #########
######################################################################
#
# Long term variables#
#
docmd='YES'
action='withecho'
action=
DEBUG=0
VERBOSE=''
statedir='/var/lib/ucf';
THREEWAY=
# Note that we use `"$@"' to let each command-line parameter expand to a
# separate word. The quotes around `$@' are essential!
# We need TEMP as the `eval set --' would nuke the return value of getopt.
TEMP=$(getopt -a -o hd::D::fnvp -n "$progname" \
--long help,debug::,DEBUG::,force,no-action,purge,verbose,state-dir: \
-- "$@")
if [ $? != 0 ] ; then
echo "Error handling options.Terminating..." >&2 ;
exit 1 ;
fi
# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"
while true ; do
case "$1" in
-h|--help) usageversion; exit 0 ;;
-n|--no-action) action='echo'; docmd='NO'; shift ;;
-v|--verbose) VERBOSE=1; shift ;;
-f|--force) FORCE=1; shift ;;
--state-dir) opt_state_dir="$2"; shift 2 ;;
-D|-d|--debug|--DEBUG)
# d has an optional argument. As we are in quoted mode,
# an empty parameter will be generated if its optional
# argument is not found.
case "$2" in
"") setq DEBUG 1 "The Debug value"; shift 2 ;;
*) setq DEBUG "$2" "The Debug value"; shift 2 ;;
esac ;;
-p|--purge) PURGE=YES; shift ;;
--) shift ; break ;;
*) echo >&2 "$progname: Internal error!" ; exit 1 ;;
esac
done
# Need to run as root, or else the
if test "$(id -u)" != 0; then
if [ "$docmd" = "YES" ]; then
echo "$progname: Need to be run as root." >&2
echo "$progname: Setting up no action mode." >&2
action='echo';
docmd='NO';
fi
fi
if [ $# != 2 ]; then
echo >&2 "$progname: *** ERROR: Need exactly two arguments, got $#";
echo >&2 ""
usageversion;
exit 3 ;
fi
# We have here a configuration file, which can be a symlink, and may
# contain characters that are unsafe in regular expressions
setq pkg "$1" "The Package name";
setq conf_file "$2" "The Configuration file";
setq real_conf_file "$(readlink -q -m $conf_file)" "The (real) Configuration file";
pkg_re="$(echo $pkg | sed -e 's,+,\\+,')"
conf_file_re="$(echo $conf_file | sed -e 's,+,\\+,')"
real_conf_file_re="$(echo $real_conf_file | sed -e 's,+,\\+,')"
case $conf_file_re in
/*)
: echo fine
;;
*)
echo >&2 "$progname: Need a fully qualified path for the file \"$conf_file\""
# Don't exit with an error for etch'
exit 0;
esac
# Load site defaults and over rides.
if [ -f /etc/ucf.conf ]; then
. /etc/ucf.conf
fi
# Command line, env variable, config file, or default
if [ ! "x$opt_state_dir" = "x" ]; then
setq statedir "$opt_state_dir" "The State directory"
elif [ ! "x$UCF_STATE_DIR" = "x" ]; then
setq statedir "$UCF_STATE_DIR" "The State directory"
elif [ ! "x$conf_state_dir" = "x" ]; then
setq statedir "$conf_state_dir" "The State directory"
else
setq statedir '/var/lib/ucf' "The State directory"
fi
# VERBOSE of 0 is supposed to be the same as not setting VERBOSE
if [ "X$VERBOSE" = "X0" ]; then
VERBOSE=''
fi
#
if [ -e "$statedir/registry" -a ! -w "$statedir/registry" ]; then
echo >&2 "$progname: do not have write privilege to the registry data"
if [ "X$docmd" = "XYES" ]; then
exit 1;
fi
fi
# test and see if this file exists in the database
if [ ! -d "$statedir" ]; then
$action mkdir -p "$statedir"
fi
if [ ! -f "$statedir/registry" ]; then
$action touch "$statedir/registry"
fi
if [ "X$VERBOSE" != "X" ]; then
echo >&2 "$progname: The registry exists"
fi
# sanity check
count=$(grep -E --count "[[:space:]]${real_conf_file_re}$" "$statedir/registry") || true
if [ "$count" -ge 2 ]; then
echo >&2 "$progname: Corrupt registry: Duplicate entries for ${conf_file}";
grep -E "[[:space:]]${real_conf_file_re}$" "$statedir/registry";
exit "$count";
fi
if [ "X$PURGE" != "X" ]; then
$action purge_from_registry
else
$action replace_in_registry
fi
exit 0;
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