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Diffstat (limited to 'script/invoke-rc.d')
| -rwxr-xr-x | script/invoke-rc.d | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/script/invoke-rc.d b/script/invoke-rc.d new file mode 100755 index 0000000..ca1bdbe --- /dev/null +++ b/script/invoke-rc.d @@ -0,0 +1,574 @@ +#!/bin/sh +# vim: ft=sh +# +# invoke-rc.d.sysvinit - Executes initscript actions +# +# SysVinit /etc/rc?.d version for Debian's sysvinit package +# +# Copyright (C) 2000,2001 Henrique de Moraes Holschuh <hmh@debian.org> +# +# This program is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the Free +# Software Foundation; either version 2 of the License, or (at your option) +# any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +# or FITNESS FOR A PARTICULAR PURPOSE. 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=$DPKG_ROOT/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 <<EOF + +invoke-rc.d, Debian/SysVinit (/etc/rc?.d) initscript subsystem. +Copyright (c) 2000,2001 Henrique de Moraes Holschuh <hmh@debian.org> + +Usage: + invoke-rc.d [options] <basename> <action> [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 "$is_systemd" ]; then + if [ "$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) + + 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 ${UNIT} 2>/dev/null)" + # Don't block on reload requests during bootup and shutdown + # from units/hooks and simply schedule the task. + if ! systemctl --quiet is-system-running; then + sctl_args="--no-block" + fi + if [ "$_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} |