JezK
Edit File: ucfr
#!/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;