diff options
Diffstat (limited to 'contrib/openresolv/resolvconf.in')
| -rw-r--r-- | contrib/openresolv/resolvconf.in | 186 |
1 files changed, 151 insertions, 35 deletions
diff --git a/contrib/openresolv/resolvconf.in b/contrib/openresolv/resolvconf.in index 3bfed5e..3ac72f3 100644 --- a/contrib/openresolv/resolvconf.in +++ b/contrib/openresolv/resolvconf.in @@ -25,9 +25,12 @@ # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. RESOLVCONF="$0" +OPENRESOLV_VERSION="3.8.1" SYSCONFDIR=@SYSCONFDIR@ LIBEXECDIR=@LIBEXECDIR@ VARDIR=@VARDIR@ +RCDIR=@RCDIR@ +RESTARTCMD=@RESTARTCMD@ # Disregard dhcpcd setting unset interface_order state_dir @@ -71,55 +74,45 @@ error_exit() usage() { cat <<-EOF - Usage: ${RESOLVCONF##*/} [options] + Usage: ${RESOLVCONF##*/} [options] command [argument] Inform the system about any DNS updates. - Options: + Commands: -a \$INTERFACE Add DNS information to the specified interface (DNS supplied via stdin in resolv.conf format) - -m metric Give the added DNS information a metric - -p Mark the interface as private - -x Mark the interface as exclusive -d \$INTERFACE Delete DNS information from the specified interface - -f Ignore non existant interfaces - -I Init the state dir - -u Run updates from our current DNS information - -l [\$PATTERN] Show DNS information, optionally from interfaces - that match the specified pattern + -h Show this help cruft -i [\$PATTERN] Show interfaces that have supplied DNS information optionally from interfaces that match the specified pattern + -l [\$PATTERN] Show DNS information, optionally from interfaces + that match the specified pattern + + -u Run updates from our current DNS information + + Options: + -f Ignore non existent interfaces + -m metric Give the added DNS information a metric + -p Mark the interface as private + -x Mark the interface as exclusive + + Subscriber and System Init Commands: + -I Init the state dir + -r \$SERVICE Restart the system service + (restarting a non-existent or non-running service + should have no output and return 0) + -R Show the system service restart command -v [\$PATTERN] echo NEWDOMAIN, NEWSEARCH and NEWNS variables to the console - -h Show this help cruft + -V [\$PATTERN] Same as -v, but only uses configuration in + $SYSCONFDIR/resolvconf.conf EOF [ -z "$1" ] && exit 0 echo error_exit "$*" } -echo_resolv() -{ - local line= OIFS="$IFS" - - [ -n "$1" -a -f "$IFACEDIR/$1" ] || return 1 - echo "# resolv.conf from $1" - # Our variable maker works of the fact each resolv.conf per interface - # is separated by blank lines. - # So we remove them when echoing them. - while read -r line; do - IFS="$OIFS" - if [ -n "$line" ]; then - # We need to set IFS here to preserve any whitespace - IFS='' - printf "%s\n" "$line" - fi - done < "$IFACEDIR/$1" - echo - IFS="$OIFS" -} - # Strip any trailing dot from each name as a FQDN does not belong # in resolv.conf(5) # If you think otherwise, capture a DNS trace and you'll see libc @@ -159,7 +152,10 @@ parse_resolv() private=false for p in $private_interfaces; do case "$iface" in - "$p"|"$p":*) private=true; break;; + "$p"|"$p":*) + private=true + break + ;; esac done fi @@ -261,6 +257,108 @@ config_mkdirs() return $e } +# With the advent of alternative init systems, it's possible to have +# more than one installed. So we need to try and guess what one we're +# using unless overriden by configure. +# Note that restarting a service is a last resort - the subscribers +# should make a reasonable attempt to reconfigre the service via some +# method, normally SIGHUP. +detect_init() +{ + [ -n "$RESTARTCMD" ] && return 0 + + # Detect the running init system. + # As systemd and OpenRC can be installed on top of legacy init + # systems we try to detect them first. + local status="@STATUSARG@" + : ${status:=status} + if [ -x /bin/systemctl -a -S /run/systemd/private ]; then + RESTARTCMD="if /bin/systemctl --quiet is-active \$1.service; then + /bin/systemctl restart \$1.service; +fi" + elif [ -x /usr/bin/systemctl -a -S /run/systemd/private ]; then + RESTARTCMD="if /usr/bin/systemctl --quiet is-active \$1.service; then + /usr/bin/systemctl restart \$1.service; +fi" + elif [ -x /sbin/rc-service -a \ + -s /libexec/rc/init.d/softlevel -o -s /run/openrc/softlevel ] + then + RESTARTCMD="/sbin/rc-service -i \$1 -- -Ds restart" + elif [ -x /usr/sbin/invoke-rc.d ]; then + RCDIR=/etc/init.d + RESTARTCMD="if /usr/sbin/invoke-rc.d --quiet \$1 status 1>/dev/null 2>&1; then + /usr/sbin/invoke-rc.d \$1 restart; +fi" + elif [ -x /sbin/service ]; then + # Old RedHat + RCDIR=/etc/init.d + RESTARTCMD="if /sbin/service \$1; then + /sbin/service \$1 restart; +fi" + elif [ -x /usr/sbin/service ]; then + # Could be FreeBSD + RESTARTCMD="if /usr/sbin/service \$1 $status 1>/dev/null 2>&1; then + /usr/sbin/service \$1 restart; +fi" + elif [ -x /bin/sv ]; then + RESTARTCMD="/bin/sv try-restart \$1" + elif [ -x /usr/bin/sv ]; then + RESTARTCMD="/usr/bin/sv try-restart \$1" + elif [ -e /etc/arch-release -a -d /etc/rc.d ]; then + RCDIR=/etc/rc.d + RESTARTCMD="if [ -e /var/run/daemons/\$1 ]; then + /etc/rc.d/\$1 restart; +fi" + elif [ -e /etc/slackware-version -a -d /etc/rc.d ]; then + RESTARTCMD="if /etc/rc.d/rc.\$1 status 1>/dev/null 2>&1; then + /etc/rc.d/rc.\$1 restart; +fi" + elif [ -e /etc/rc.d/rc.subr -a -d /etc/rc.d ]; then + # OpenBSD + RESTARTCMD="if /etc/rc.d/\$1 check 1>/dev/null 2>&1; then + /etc/rc.d/\$1 restart; +fi" + else + for x in /etc/init.d/rc.d /etc/rc.d /etc/init.d; do + [ -d $x ] || continue + RESTARTCMD="if $x/\$1 $status 1>/dev/null 2>&1; then + $x/\$1 restart; +fi" + break + done + fi + + if [ -z "$RESTARTCMD" ]; then + if [ "$NOINIT_WARNED" != true ]; then + warn "could not detect a useable init system" + _NOINIT_WARNED=true + fi + return 1 + fi + _NOINIT_WARNED= + return 0 +} + +echo_resolv() +{ + local line= OIFS="$IFS" + + [ -n "$1" -a -f "$IFACEDIR/$1" ] || return 1 + echo "# resolv.conf from $1" + # Our variable maker works of the fact each resolv.conf per interface + # is separated by blank lines. + # So we remove them when echoing them. + while read -r line; do + IFS="$OIFS" + if [ -n "$line" ]; then + # We need to set IFS here to preserve any whitespace + IFS='' + printf "%s\n" "$line" + fi + done < "$IFACEDIR/$1" + IFS="$OIFS" +} + list_resolv() { [ -d "$IFACEDIR" ] || return 0 @@ -320,6 +418,7 @@ list_resolv() cd "$IFACEDIR" retval=1 + excl=true for i in $(uniqify $list); do # Only list interfaces which we really have if ! [ -f "$i" ]; then @@ -334,6 +433,7 @@ list_resolv() printf %s "$i " else echo_resolv "$i" + echo fi [ $? = 0 -a "$retval" = 1 ] && retval=0 done @@ -499,7 +599,7 @@ make_vars() force=false VFLAG= -while getopts a:Dd:fhIilm:puvVx OPT; do +while getopts a:Dd:fhIilm:pRruvVx OPT; do case "$OPT" in f) force=true;; h) usage;; @@ -541,6 +641,18 @@ if [ "$cmd" = l -o "$cmd" = i ]; then exit $? fi +# Restart a service or echo the command to restart a service +if [ "$cmd" = r -o "$cmd" = R ]; then + detect_init || exit 1 + if [ "$cmd" = r ]; then + set -- $args + eval $RESTARTCMD + else + echo "$RESTARTCMD" + fi + exit $? +fi + # Not normally needed, but subscribers should be able to run independently if [ "$cmd" = v -o -n "$VFLAG" ]; then make_vars "$iface" @@ -765,13 +877,17 @@ case "${resolvconf:-YES}" in *) exit 0;; esac +# Try and detect a suitable init system for our scripts +detect_init +export RESTARTCMD RCDIR _NOINIT_WARNED + eval "$(make_vars)" export RESOLVCONF DOMAINS SEARCH NAMESERVERS LOCALNAMESERVERS : ${list_resolv:=list_resolv -l} retval=0 # Run scripts in the same directory resolvconf is run from -# in case any scripts accidently dump files in the wrong place. +# in case any scripts accidentally dump files in the wrong place. cd "$_PWD" for script in "$LIBEXECDIR"/*; do if [ -f "$script" ]; then |
