584 lines
17 KiB
Bash
Executable File
584 lines
17 KiB
Bash
Executable File
#!/bin/sh
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# vim: ft=sh
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#
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# invoke-rc.d.sysvinit - Executes initscript actions
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#
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# SysVinit /etc/rc?.d version for Debian's sysvinit package
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#
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# Copyright (C) 2000,2001 Henrique de Moraes Holschuh <hmh@debian.org>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 2 of the License, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA.
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# Constants
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RUNLEVELHELPER=/sbin/runlevel
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POLICYHELPER=/usr/sbin/policy-rc.d
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INITDPREFIX=/etc/init.d/
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RCDPREFIX=/etc/rc
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# Options
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BEQUIET=
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MODE=
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ACTION=
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FALLBACK=
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NOFALLBACK=
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FORCE=
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RETRY=
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RETURNFAILURE=
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RC=
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is_systemd=
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is_openrc=
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SKIP_SYSTEMD_NATIVE=
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# Shell options
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set +e
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dohelp () {
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#
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# outputs help and usage
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#
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cat <<EOF
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invoke-rc.d, Debian/SysVinit (/etc/rc?.d) initscript subsystem.
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Copyright (c) 2000,2001 Henrique de Moraes Holschuh <hmh@debian.org>
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Usage:
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invoke-rc.d [options] <basename> <action> [extra parameters]
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basename - Initscript ID, as per update-rc.d(8)
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action - Initscript action. Known actions are:
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start, [force-]stop, [try-]restart,
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[force-]reload, status
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WARNING: not all initscripts implement all of the above actions.
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extra parameters are passed as is to the initscript, following
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the action (first initscript parameter).
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Options:
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--quiet
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Quiet mode, no error messages are generated.
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--force
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Try to run the initscript regardless of policy and subsystem
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non-fatal errors.
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--try-anyway
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Try to run init script even if a non-fatal error is found.
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--disclose-deny
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Return status code 101 instead of status code 0 if
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initscript action is denied by local policy rules or
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runlevel constrains.
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--query
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Returns one of status codes 100-106, does not run
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the initscript. Implies --disclose-deny and --no-fallback.
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--no-fallback
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Ignores any fallback action requests by the policy layer.
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Warning: this is usually a very *bad* idea for any actions
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other than "start".
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--skip-systemd-native
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Exits before doing anything if a systemd environment is detected
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and the requested service is a native systemd unit.
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This is useful for maintainer scripts that want to defer systemd
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actions to deb-systemd-invoke
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--help
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Outputs help message to stdout
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EOF
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}
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printerror () {
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#
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# prints an error message
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# $* - error message
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#
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if test x${BEQUIET} = x ; then
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echo `basename $0`: "$*" >&2
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fi
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}
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formataction () {
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#
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# formats a list in $* into $printaction
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# for human-friendly printing to stderr
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# and sets $naction to action or actions
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#
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printaction=`echo $* | sed 's/ /, /g'`
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if test $# -eq 1 ; then
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naction=action
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else
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naction=actions
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fi
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}
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querypolicy () {
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#
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# queries policy database
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# returns: $RC = 104 - ok, run
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# $RC = 101 - ok, do not run
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# other - exit with status $RC, maybe run if $RETRY
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# initial status of $RC is taken into account.
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#
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policyaction="${ACTION}"
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if test x${RC} = "x101" ; then
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if test "${ACTION}" = "start" || test "${ACTION}" = "restart" || test "${ACTION}" = "try-restart"; then
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policyaction="(${ACTION})"
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fi
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fi
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if test "x${POLICYHELPER}" != x && test -x "${POLICYHELPER}" ; then
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FALLBACK=`${POLICYHELPER} ${BEQUIET} ${INITSCRIPTID} "${policyaction}" ${RL}`
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RC=$?
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formataction ${ACTION}
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case ${RC} in
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0) RC=104
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;;
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1) RC=105
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;;
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101) if test x${FORCE} != x ; then
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printerror Overriding policy-rc.d denied execution of ${printaction}.
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RC=104
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else
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printerror policy-rc.d denied execution of ${printaction}.
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fi
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;;
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esac
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if test x${MODE} != xquery ; then
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case ${RC} in
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105) printerror policy-rc.d query returned \"behaviour undefined\",
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printerror assuming \"${printaction}\" is allowed.
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RC=104
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;;
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106) formataction ${FALLBACK}
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if test x${FORCE} = x ; then
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if test x${NOFALLBACK} = x ; then
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ACTION="${FALLBACK}"
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printerror executing ${naction} \"${printaction}\" instead due to policy-rc.d request.
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RC=104
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else
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printerror ignoring policy-rc.d fallback request: ${printaction}.
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RC=101
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fi
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else
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printerror ignoring policy-rc.d fallback request: ${printaction}.
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RC=104
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fi
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;;
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esac
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fi
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case ${RC} in
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100|101|102|103|104|105|106) ;;
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*) printerror WARNING: policy-rc.d returned unexpected error status ${RC}, 102 used instead.
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RC=102
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;;
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esac
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else
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if test ! -e "/sbin/init" ; then
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if test x${FORCE} != x ; then
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printerror "WARNING: No init system and policy-rc.d missing, but force specified so proceeding."
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else
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printerror "WARNING: No init system and policy-rc.d missing! Defaulting to block."
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RC=101
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fi
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fi
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if test x${RC} = x ; then
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RC=104
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fi
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fi
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return
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}
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verifyparameter () {
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#
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# Verifies if $1 is not null, and $# = 1
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#
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if test $# -eq 0 ; then
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printerror syntax error: invalid empty parameter
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exit 103
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elif test $# -ne 1 ; then
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printerror syntax error: embedded blanks are not allowed in \"$*\"
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exit 103
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fi
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return
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}
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##
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## main
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##
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## Verifies command line arguments
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if test $# -eq 0 ; then
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printerror syntax error: missing required parameter, --help assumed
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dohelp
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exit 103
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fi
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state=I
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while test $# -gt 0 && test ${state} != III ; do
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case "$1" in
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--help) dohelp
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exit 0
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;;
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--quiet) BEQUIET=--quiet
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;;
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--force) FORCE=yes
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RETRY=yes
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;;
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--try-anyway)
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RETRY=yes
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;;
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--disclose-deny)
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RETURNFAILURE=yes
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;;
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--query) MODE=query
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RETURNFAILURE=yes
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;;
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--no-fallback)
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NOFALLBACK=yes
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;;
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--skip-systemd-native) SKIP_SYSTEMD_NATIVE=yes
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;;
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--*) printerror syntax error: unknown option \"$1\"
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exit 103
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;;
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*) case ${state} in
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I) verifyparameter $1
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INITSCRIPTID=$1
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;;
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II) verifyparameter $1
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ACTION=$1
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;;
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esac
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state=${state}I
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;;
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esac
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shift
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done
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if test ${state} != III ; then
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printerror syntax error: missing required parameter
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exit 103
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fi
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#NOTE: It may not be obvious, but "$@" from this point on must expand
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#to the extra initscript parameters, except inside functions.
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if test -d /run/systemd/system ; then
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is_systemd=1
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UNIT="${INITSCRIPTID%.sh}.service"
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elif test -f /run/openrc/softlevel ; then
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is_openrc=1
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elif test ! -f "${INITDPREFIX}${INITSCRIPTID}" ; then
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## Verifies if the given initscript ID is known
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## For sysvinit, this error is critical
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printerror unknown initscript, ${INITDPREFIX}${INITSCRIPTID} not found.
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fi
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## Queries sysvinit for the current runlevel
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if [ ! -x ${RUNLEVELHELPER} ] || ! RL=`${RUNLEVELHELPER}`; then
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if [ -n "$is_systemd" ] && systemctl is-active --quiet sysinit.target; then
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# under systemd, the [2345] runlevels are only set upon reaching them;
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# if we are past sysinit.target (roughly equivalent to rcS), consider
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# this as runlevel 5 (this is only being used for validating rcN.d
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# symlinks, so the precise value does not matter much)
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RL=5
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else
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printerror "could not determine current runlevel"
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# this usually fails in schroots etc., ignore failure (#823611)
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RL=
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fi
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fi
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# strip off previous runlevel
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RL=${RL#* }
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## Running ${RUNLEVELHELPER} to get current runlevel do not work in
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## the boot runlevel (scripts in /etc/rcS.d/), as /var/run/utmp
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## contains runlevel 0 or 6 (written at shutdown) at that point.
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if test x${RL} = x0 || test x${RL} = x6 ; then
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if ps -fp 1 | grep -q 'init boot' ; then
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RL=S
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fi
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fi
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## Handles shutdown sequences VERY safely
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## i.e.: forget about policy, and do all we can to run the script.
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## BTW, why the heck are we being run in a shutdown runlevel?!
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if test x${RL} = x0 || test x${RL} = x6 ; then
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FORCE=yes
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RETRY=yes
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POLICYHELPER=
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BEQUIET=
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printerror "-----------------------------------------------------"
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printerror "WARNING: 'invoke-rc.d ${INITSCRIPTID} ${ACTION}' called"
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printerror "during shutdown sequence."
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printerror "enabling safe mode: initscript policy layer disabled"
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printerror "-----------------------------------------------------"
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fi
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## Verifies the existance of proper S??initscriptID and K??initscriptID
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## *links* in the proper /etc/rc?.d/ directory
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verifyrclink () {
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#
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# verifies if parameters are non-dangling symlinks
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# all parameters are verified
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#
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doexit=
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while test $# -gt 0 ; do
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if test ! -L "$1" ; then
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printerror not a symlink: $1
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doexit=102
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fi
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if test ! -f "$1" ; then
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printerror dangling symlink: $1
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doexit=102
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fi
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shift
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done
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if test x${doexit} != x && test x${RETRY} = x; then
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exit ${doexit}
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fi
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return 0
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}
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testexec () {
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#
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# returns true if any of the parameters is
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# executable (after following links)
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#
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while test $# -gt 0 ; do
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if test -x "$1" ; then
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return 0
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fi
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shift
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done
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return 1
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}
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RC=
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###
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### LOCAL POLICY: Enforce that the script/unit is enabled. For SysV init
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### scripts, this needs a start entry in either runlevel S or current runlevel
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### to allow start or restart.
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if [ -n "$is_systemd" ]; then
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case ${ACTION} in
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start|restart|try-restart)
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# If a package ships both init script and systemd service file, the
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# systemd unit will not be enabled by the time invoke-rc.d is called
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# (with current debhelper sequence). This would make systemctl is-enabled
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# report the wrong status, and then the service would not be started.
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# This check cannot be removed as long as we support not passing --skip-systemd-native
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if systemctl --quiet is-enabled "${UNIT}" 2>/dev/null || \
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ls ${RCDPREFIX}[S2345].d/S[0-9][0-9]${INITSCRIPTID} >/dev/null 2>&1; then
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RC=104
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elif systemctl --quiet is-active "${UNIT}" 2>/dev/null; then
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RC=104
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else
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RC=101
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fi
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;;
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esac
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else
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# we do handle multiple links per runlevel
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# but we don't handle embedded blanks in link names :-(
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if test x${RL} != x ; then
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SLINK=`ls -d -Q ${RCDPREFIX}${RL}.d/S[0-9][0-9]${INITSCRIPTID} 2>/dev/null | xargs`
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KLINK=`ls -d -Q ${RCDPREFIX}${RL}.d/K[0-9][0-9]${INITSCRIPTID} 2>/dev/null | xargs`
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SSLINK=`ls -d -Q ${RCDPREFIX}S.d/S[0-9][0-9]${INITSCRIPTID} 2>/dev/null | xargs`
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verifyrclink ${SLINK} ${KLINK} ${SSLINK}
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fi
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case ${ACTION} in
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start|restart|try-restart)
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if testexec ${SLINK} ; then
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RC=104
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elif testexec ${KLINK} ; then
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RC=101
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elif testexec ${SSLINK} ; then
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RC=104
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else
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RC=101
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fi
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;;
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esac
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fi
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# test if /etc/init.d/initscript is actually executable
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_executable=
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if [ -n "$is_systemd" ]; then
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_executable=1
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elif testexec "${INITDPREFIX}${INITSCRIPTID}"; then
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_executable=1
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fi
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if [ "$_executable" = "1" ]; then
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if test x${RC} = x && test x${MODE} = xquery ; then
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RC=105
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fi
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# call policy layer
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querypolicy
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case ${RC} in
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101|104)
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;;
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*) if test x${MODE} != xquery ; then
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printerror policy-rc.d returned error status ${RC}
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if test x${RETRY} = x ; then
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exit ${RC}
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else
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RC=102
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fi
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fi
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;;
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esac
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else
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###
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### LOCAL INITSCRIPT POLICY: non-executable initscript; deny exec.
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### (this is common sense, actually :^P )
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###
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RC=101
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fi
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## Handles --query
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if test x${MODE} = xquery ; then
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exit ${RC}
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fi
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setechoactions () {
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if test $# -gt 1 ; then
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echoaction=true
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else
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echoaction=
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fi
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}
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getnextaction () {
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saction=$1
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shift
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ACTION="$@"
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}
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## Executes initscript
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## note that $ACTION is a space-separated list of actions
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## to be attempted in order until one suceeds.
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if test x${FORCE} != x || test ${RC} -eq 104 ; then
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if [ -n "$is_systemd" ] || testexec "${INITDPREFIX}${INITSCRIPTID}" ; then
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RC=102
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setechoactions ${ACTION}
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while test ! -z "${ACTION}" ; do
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getnextaction ${ACTION}
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if test ! -z ${echoaction} ; then
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printerror executing initscript action \"${saction}\"...
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fi
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if [ -n "$is_systemd" ]; then
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if [ -n "$DPKG_MAINTSCRIPT_PACKAGE" ]; then
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# If we are called by a maintainer script, chances are good that a
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# new or updated sysv init script was installed. Reload daemon to
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# pick up any changes.
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systemctl daemon-reload
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fi
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if [ "$SKIP_SYSTEMD_NATIVE" = yes ] ; then
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case $(systemctl show --value --property SourcePath "${UNIT}") in
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/etc/init.d/*)
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;;
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*)
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# We were asked to skip native systemd units, and this one was not generated by the sysv generator
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# exit cleanly
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exit 0
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;;
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esac
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fi
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_state=$(systemctl -p LoadState show "${UNIT}" 2>/dev/null)
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# avoid deadlocks during bootup and shutdown from units/hooks
|
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# which call "invoke-rc.d service reload" and similar, since
|
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# the synchronous wait plus systemd's normal behaviour of
|
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# transactionally processing all dependencies first easily
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# causes dependency loops
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if ! systemctl --quiet is-active multi-user.target; then
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sctl_args="--job-mode=ignore-dependencies"
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fi
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case $saction in
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start|restart|try-restart)
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[ "$_state" != "LoadState=masked" ] || exit 0
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systemctl $sctl_args "${saction}" "${UNIT}" && exit 0
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;;
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stop|status)
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systemctl $sctl_args "${saction}" "${UNIT}" && exit 0
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;;
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reload)
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[ "$_state" != "LoadState=masked" ] || exit 0
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_canreload="$(systemctl -p CanReload show ${UNIT} 2>/dev/null)"
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if [ "$_canreload" = "CanReload=no" ]; then
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"${INITDPREFIX}${INITSCRIPTID}" "${saction}" "$@" && exit 0
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else
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systemctl $sctl_args reload "${UNIT}" && exit 0
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fi
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;;
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force-stop)
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systemctl --signal=KILL kill "${UNIT}" && exit 0
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;;
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force-reload)
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[ "$_state" != "LoadState=masked" ] || exit 0
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_canreload="$(systemctl -p CanReload show ${UNIT} 2>/dev/null)"
|
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if [ "$_canreload" = "CanReload=no" ]; then
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systemctl $sctl_args restart "${UNIT}" && exit 0
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else
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systemctl $sctl_args reload "${UNIT}" && exit 0
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fi
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;;
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*)
|
|
# 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}
|