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See the GNU General Public License # for more details. # # 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., # 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. # Constants RUNLEVELHELPER=/sbin/runlevel POLICYHELPER=/usr/sbin/policy-rc.d INITDPREFIX=/etc/init.d/ RCDPREFIX=/etc/rc # Options BEQUIET= MODE= ACTION= FALLBACK= NOFALLBACK= FORCE= RETRY= RETURNFAILURE= RC= is_systemd= is_openrc= SKIP_SYSTEMD_NATIVE= # Shell options set +e dohelp () { # # outputs help and usage # cat < Usage: invoke-rc.d [options] [extra parameters] basename - Initscript ID, as per update-rc.d(8) action - Initscript action. Known actions are: start, [force-]stop, [try-]restart, [force-]reload, status WARNING: not all initscripts implement all of the above actions. extra parameters are passed as is to the initscript, following the action (first initscript parameter). Options: --quiet Quiet mode, no error messages are generated. --force Try to run the initscript regardless of policy and subsystem non-fatal errors. --try-anyway Try to run init script even if a non-fatal error is found. --disclose-deny Return status code 101 instead of status code 0 if initscript action is denied by local policy rules or runlevel constrains. --query Returns one of status codes 100-106, does not run the initscript. Implies --disclose-deny and --no-fallback. --no-fallback Ignores any fallback action requests by the policy layer. Warning: this is usually a very *bad* idea for any actions other than "start". --skip-systemd-native Exits before doing anything if a systemd environment is detected and the requested service is a native systemd unit. This is useful for maintainer scripts that want to defer systemd actions to deb-systemd-invoke --help Outputs help message to stdout EOF } printerror () { # # prints an error message # $* - error message # if test x${BEQUIET} = x ; then echo `basename $0`: "$*" >&2 fi } formataction () { # # formats a list in $* into $printaction # for human-friendly printing to stderr # and sets $naction to action or actions # printaction=`echo $* | sed 's/ /, /g'` if test $# -eq 1 ; then naction=action else naction=actions fi } querypolicy () { # # queries policy database # returns: $RC = 104 - ok, run # $RC = 101 - ok, do not run # other - exit with status $RC, maybe run if $RETRY # initial status of $RC is taken into account. # policyaction="${ACTION}" if test x${RC} = "x101" ; then if test "${ACTION}" = "start" || test "${ACTION}" = "restart" || test "${ACTION}" = "try-restart"; then policyaction="(${ACTION})" fi fi if test "x${POLICYHELPER}" != x && test -x "${POLICYHELPER}" ; then FALLBACK=`${POLICYHELPER} ${BEQUIET} ${INITSCRIPTID} "${policyaction}" ${RL}` RC=$? formataction ${ACTION} case ${RC} in 0) RC=104 ;; 1) RC=105 ;; 101) if test x${FORCE} != x ; then printerror Overriding policy-rc.d denied execution of ${printaction}. RC=104 else printerror policy-rc.d denied execution of ${printaction}. fi ;; esac if test x${MODE} != xquery ; then case ${RC} in 105) printerror policy-rc.d query returned \"behaviour undefined\", printerror assuming \"${printaction}\" is allowed. RC=104 ;; 106) formataction ${FALLBACK} if test x${FORCE} = x ; then if test x${NOFALLBACK} = x ; then ACTION="${FALLBACK}" printerror executing ${naction} \"${printaction}\" instead due to policy-rc.d request. RC=104 else printerror ignoring policy-rc.d fallback request: ${printaction}. RC=101 fi else printerror ignoring policy-rc.d fallback request: ${printaction}. RC=104 fi ;; esac fi case ${RC} in 100|101|102|103|104|105|106) ;; *) printerror WARNING: policy-rc.d returned unexpected error status ${RC}, 102 used instead. RC=102 ;; esac else if test ! -e "/sbin/init" ; then if test x${FORCE} != x ; then printerror "WARNING: No init system and policy-rc.d missing, but force specified so proceeding." else printerror "WARNING: No init system and policy-rc.d missing! Defaulting to block." RC=101 fi fi if test x${RC} = x ; then RC=104 fi fi return } verifyparameter () { # # Verifies if $1 is not null, and $# = 1 # if test $# -eq 0 ; then printerror syntax error: invalid empty parameter exit 103 elif test $# -ne 1 ; then printerror syntax error: embedded blanks are not allowed in \"$*\" exit 103 fi return } ## ## main ## ## Verifies command line arguments if test $# -eq 0 ; then printerror syntax error: missing required parameter, --help assumed dohelp exit 103 fi state=I while test $# -gt 0 && test ${state} != III ; do case "$1" in --help) dohelp exit 0 ;; --quiet) BEQUIET=--quiet ;; --force) FORCE=yes RETRY=yes ;; --try-anyway) RETRY=yes ;; --disclose-deny) RETURNFAILURE=yes ;; --query) MODE=query RETURNFAILURE=yes ;; --no-fallback) NOFALLBACK=yes ;; --skip-systemd-native) SKIP_SYSTEMD_NATIVE=yes ;; --*) printerror syntax error: unknown option \"$1\" exit 103 ;; *) case ${state} in I) verifyparameter $1 INITSCRIPTID=$1 ;; II) verifyparameter $1 ACTION=$1 ;; esac state=${state}I ;; esac shift done if test ${state} != III ; then printerror syntax error: missing required parameter exit 103 fi #NOTE: It may not be obvious, but "$@" from this point on must expand #to the extra initscript parameters, except inside functions. if test -d /run/systemd/system ; then is_systemd=1 UNIT="${INITSCRIPTID%.sh}.service" elif test -f /run/openrc/softlevel ; then is_openrc=1 elif test ! -f "${INITDPREFIX}${INITSCRIPTID}" ; then ## Verifies if the given initscript ID is known ## For sysvinit, this error is critical printerror unknown initscript, ${INITDPREFIX}${INITSCRIPTID} not found. fi ## Queries sysvinit for the current runlevel if [ ! -x ${RUNLEVELHELPER} ] || ! RL=`${RUNLEVELHELPER}`; then if [ -n "$is_systemd" ] && systemctl is-active --quiet sysinit.target; then # under systemd, the [2345] runlevels are only set upon reaching them; # if we are past sysinit.target (roughly equivalent to rcS), consider # this as runlevel 5 (this is only being used for validating rcN.d # symlinks, so the precise value does not matter much) RL=5 else printerror "could not determine current runlevel" # this usually fails in schroots etc., ignore failure (#823611) RL= fi fi # strip off previous runlevel RL=${RL#* } ## Running ${RUNLEVELHELPER} to get current runlevel do not work in ## the boot runlevel (scripts in /etc/rcS.d/), as /var/run/utmp ## contains runlevel 0 or 6 (written at shutdown) at that point. if test x${RL} = x0 || test x${RL} = x6 ; then if ps -fp 1 | grep -q 'init boot' ; then RL=S fi fi ## Handles shutdown sequences VERY safely ## i.e.: forget about policy, and do all we can to run the script. ## BTW, why the heck are we being run in a shutdown runlevel?! if test x${RL} = x0 || test x${RL} = x6 ; then FORCE=yes RETRY=yes POLICYHELPER= BEQUIET= printerror "-----------------------------------------------------" printerror "WARNING: 'invoke-rc.d ${INITSCRIPTID} ${ACTION}' called" printerror "during shutdown sequence." printerror "enabling safe mode: initscript policy layer disabled" printerror "-----------------------------------------------------" fi ## Verifies the existance of proper S??initscriptID and K??initscriptID ## *links* in the proper /etc/rc?.d/ directory verifyrclink () { # # verifies if parameters are non-dangling symlinks # all parameters are verified # doexit= while test $# -gt 0 ; do if test ! -L "$1" ; then printerror not a symlink: $1 doexit=102 fi if test ! -f "$1" ; then printerror dangling symlink: $1 doexit=102 fi shift done if test x${doexit} != x && test x${RETRY} = x; then exit ${doexit} fi return 0 } testexec () { # # returns true if any of the parameters is # executable (after following links) # while test $# -gt 0 ; do if test -x "$1" ; then return 0 fi shift done return 1 } RC= ### ### LOCAL POLICY: Enforce that the script/unit is enabled. For SysV init ### scripts, this needs a start entry in either runlevel S or current runlevel ### to allow start or restart. if [ -n "$is_systemd" ]; then case ${ACTION} in start|restart|try-restart) # If a package ships both init script and systemd service file, the # systemd unit will not be enabled by the time invoke-rc.d is called # (with current debhelper sequence). This would make systemctl is-enabled # report the wrong status, and then the service would not be started. # This check cannot be removed as long as we support not passing --skip-systemd-native if systemctl --quiet is-enabled "${UNIT}" 2>/dev/null || \ ls ${RCDPREFIX}[S2345].d/S[0-9][0-9]${INITSCRIPTID} >/dev/null 2>&1; then RC=104 elif systemctl --quiet is-active "${UNIT}" 2>/dev/null; then RC=104 else RC=101 fi ;; esac else # we do handle multiple links per runlevel # but we don't handle embedded blanks in link names :-( if test x${RL} != x ; then SLINK=`ls -d -Q ${RCDPREFIX}${RL}.d/S[0-9][0-9]${INITSCRIPTID} 2>/dev/null | xargs` KLINK=`ls -d -Q ${RCDPREFIX}${RL}.d/K[0-9][0-9]${INITSCRIPTID} 2>/dev/null | xargs` SSLINK=`ls -d -Q ${RCDPREFIX}S.d/S[0-9][0-9]${INITSCRIPTID} 2>/dev/null | xargs` verifyrclink ${SLINK} ${KLINK} ${SSLINK} fi case ${ACTION} in start|restart|try-restart) if testexec ${SLINK} ; then RC=104 elif testexec ${KLINK} ; then RC=101 elif testexec ${SSLINK} ; then RC=104 else RC=101 fi ;; esac fi # test if /etc/init.d/initscript is actually executable _executable= if [ -n "$is_systemd" ]; then _executable=1 elif testexec "${INITDPREFIX}${INITSCRIPTID}"; then _executable=1 fi if [ "$_executable" = "1" ]; then if test x${RC} = x && test x${MODE} = xquery ; then RC=105 fi # call policy layer querypolicy case ${RC} in 101|104) ;; *) if test x${MODE} != xquery ; then printerror policy-rc.d returned error status ${RC} if test x${RETRY} = x ; then exit ${RC} else RC=102 fi fi ;; esac else ### ### LOCAL INITSCRIPT POLICY: non-executable initscript; deny exec. ### (this is common sense, actually :^P ) ### RC=101 fi ## Handles --query if test x${MODE} = xquery ; then exit ${RC} fi setechoactions () { if test $# -gt 1 ; then echoaction=true else echoaction= fi } getnextaction () { saction=$1 shift ACTION="$@" } ## Executes initscript ## note that $ACTION is a space-separated list of actions ## to be attempted in order until one suceeds. if test x${FORCE} != x || test ${RC} -eq 104 ; then if [ -n "$is_systemd" ] || testexec "${INITDPREFIX}${INITSCRIPTID}" ; then RC=102 setechoactions ${ACTION} while test ! -z "${ACTION}" ; do getnextaction ${ACTION} if test ! -z ${echoaction} ; then printerror executing initscript action \"${saction}\"... fi if [ -n "$is_systemd" ]; then if [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ]; then # If we are called by a maintainer script, chances are good that a # new or updated sysv init script was installed. Reload daemon to # pick up any changes. systemctl daemon-reload fi if [ "$SKIP_SYSTEMD_NATIVE" = yes ] ; then case $(systemctl show --value --property SourcePath "${UNIT}") in /etc/init.d/*) ;; *) # We were asked to skip native systemd units, and this one was not generated by the sysv generator # exit cleanly exit 0 ;; esac fi _state=$(systemctl -p LoadState show "${UNIT}" 2>/dev/null) # avoid deadlocks during bootup and shutdown from units/hooks # which call "invoke-rc.d service reload" and similar, since # the synchronous wait plus systemd's normal behaviour of # transactionally processing all dependencies first easily # causes dependency loops if ! systemctl --quiet is-active multi-user.target; then sctl_args="--job-mode=ignore-dependencies" fi case $saction in start|restart|try-restart) [ "$_state" != "LoadState=masked" ] || exit 0 systemctl $sctl_args "${saction}" "${UNIT}" && exit 0 ;; stop|status) systemctl $sctl_args "${saction}" "${UNIT}" && exit 0 ;; reload) [ "$_state" != "LoadState=masked" ] || exit 0 _canreload="$(systemctl -p CanReload show ${UNIT} 2>/dev/null)" if [ "$_canreload" = "CanReload=no" ]; then "${INITDPREFIX}${INITSCRIPTID}" "${saction}" "$@" && exit 0 else systemctl $sctl_args reload "${UNIT}" && exit 0 fi ;; force-stop) systemctl --signal=KILL kill "${UNIT}" && exit 0 ;; force-reload) [ "$_state" != "LoadState=masked" ] || exit 0 _canreload="$(systemctl -p CanReload show ${UNIT} 2>/dev/null)" if [ "$_canreload" = "CanReload=no" ]; then systemctl $sctl_args restart "${UNIT}" && exit 0 else systemctl $sctl_args reload "${UNIT}" && exit 0 fi ;; *) # We try to run non-standard actions by running # the init script directly. "${INITDPREFIX}${INITSCRIPTID}" "${saction}" "$@" && exit 0 ;; esac elif [ -n "$is_openrc" ]; then rc-service "${INITSCRIPTID}" "${saction}" && exit 0 else "${INITDPREFIX}${INITSCRIPTID}" "${saction}" "$@" && exit 0 fi RC=$? if test ! -z "${ACTION}" ; then printerror action \"${saction}\" failed, trying next action... fi done printerror initscript ${INITSCRIPTID}, action \"${saction}\" failed. if [ -n "$is_systemd" ] && [ "$saction" = start -o "$saction" = restart -o "$saction" = "try-restart" ]; then systemctl status --full --no-pager "${UNIT}" || true fi exit ${RC} fi exit 102 fi ## Handles --disclose-deny and denied "status" action (bug #381497) if test ${RC} -eq 101 && test x${RETURNFAILURE} = x ; then if test "x${ACTION%% *}" = "xstatus"; then printerror emulating initscript action \"status\", returning \"unknown\" RC=4 else RC=0 fi else formataction ${ACTION} printerror initscript ${naction} \"${printaction}\" not executed. fi exit ${RC}