136 lines
4.1 KiB
Bash
Executable File
136 lines
4.1 KiB
Bash
Executable File
#!/bin/sh
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#
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### BEGIN INIT INFO
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# Provides: resolvconf
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# Required-Start: $local_fs
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# Required-Stop: $local_fs
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# X-Start-Before: networking ifupdown
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# Default-Start: S
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# Default-Stop: 0 6
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# Short-Description: Nameserver information manager
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# Description: This service manages the list of nameserver addresses
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# used by the libc resolver and name service caches
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### END INIT INFO
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#
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# This file is part of the resolvconf package.
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#
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# We really need "X-Stop-Before: networking ifupdown" too because
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# terminal ifdowns shouldn't update resolv.conf;
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# however there is unfortunately no such thing as "X-Stop-Before".
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#
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# This file is not used in Ubuntu.
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#
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# Don't use set -e; check return status instead.
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[ -x /sbin/resolvconf ] || exit 0
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PATH=/sbin:/bin
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RUN_DIR=/run/resolvconf
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ENABLE_UPDATES_FLAGFILE="${RUN_DIR}/enable-updates"
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POSTPONED_UPDATE_FLAGFILE="${RUN_DIR}/postponed-update"
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. /lib/lsb/init-functions
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# Abort if Upstart is in use, as per Policy §9.11.1.
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case "$1" in
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start|restart|force-reload)
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init_is_upstart && exit 1
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;;
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stop)
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init_is_upstart && exit 0
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;;
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esac
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# $1 EXITSTATUS
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# [$2 MESSAGE]
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log_action_end_msg_and_exit()
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{
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log_action_end_msg "$1" ${2:+"$2"}
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exit $1
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}
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create_runtime_directories()
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{
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umask 022
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if [ ! -d "$RUN_DIR" ] ; then
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[ -L "$RUN_DIR" ] || log_action_end_msg_and_exit 1 "$RUN_DIR is neither a directory nor a symbolic link"
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# It's a symlink. Its target is not a dir.
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{ RUN_CANONICALDIR="$(readlink -f "$RUN_DIR")" && [ "$RUN_CANONICALDIR" ] ; } || log_action_end_msg_and_exit 1 "Canonical path of the run directory could not be determined"
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# Create directory at the target
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mkdir "$RUN_CANONICALDIR" || log_action_end_msg_and_exit 1 "Error creating directory $RUN_CANONICALDIR"
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fi
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# The resolvconf run directory now exists.
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if [ ! -d "${RUN_DIR}/interface" ] ; then
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mkdir "${RUN_DIR}/interface" || log_action_end_msg_and_exit 1 "Error creating directory ${RUN_DIR}/interface"
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fi
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# The interface directory now exists. We are done.
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return
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}
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wipe_runtime_directories()
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{
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# Delete files in the resolvconf run directory (target) but not the directory itself
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[ -d "$RUN_DIR" ] || return
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rm -f "$RUN_DIR"/resolv.conf
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rm -f "$ENABLE_UPDATES_FLAGFILE"
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rm -f "$POSTPONED_UPDATE_FLAGFILE"
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rm -rf "${RUN_DIR}/interface/*"
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return
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}
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case "$1" in
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start)
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# The "start" method should only be used at boot time.
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# Don't run this on package upgrade, for example.
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log_action_begin_msg "Setting up resolvconf"
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# Wipe runtime directories in case they aren't on a tmpfs
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wipe_runtime_directories
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# Create runtime directories in case they are on a tmpfs
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create_runtime_directories
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# Request a postponed update (needed in case the base file has content).
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:> "$POSTPONED_UPDATE_FLAGFILE" || log_action_end_msg_and_exit 1 "failed requesting update"
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# Enable updates and perform the postponed update.
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resolvconf --enable-updates || log_action_end_msg_and_exit 1 "failed to enable updates"
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log_action_end_msg_and_exit 0
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;;
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stop)
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# The "stop" method should only be used at shutdown time.
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log_action_begin_msg "Stopping resolvconf"
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resolvconf --disable-updates || log_action_end_msg_and_exit 1 "failed to disable updates"
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log_action_end_msg_and_exit 0
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;;
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restart)
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log_action_begin_msg "Restarting resolvconf"
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resolvconf --enable-updates || log_action_end_msg_and_exit 1 "failed to enable updates"
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log_action_end_msg_and_exit 0
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;;
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reload|force-reload)
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resolvconf -u || log_action_end_msg_and_exit 1 "failed to update"
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exit 0
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;;
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enable-updates)
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resolvconf --enable-updates || log_action_end_msg_and_exit 1 "failed to enable updates"
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exit 0
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;;
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disable-updates)
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resolvconf --disable-updates || log_action_end_msg_and_exit 1 "failed to disable updates"
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exit 0
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;;
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status)
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if resolvconf --updates-are-enabled ; then
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log_success_msg "resolvconf updates are enabled"
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else
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log_failure_msg "resolvconf updates are disabled"
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fi
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exit 0
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;;
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*)
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echo "Usage: /etc/init.d/resolvconf {start|stop|restart|reload|force-reload|enable-updates|disable-updates|status}" >&2
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exit 3
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;;
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esac
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# Don't reach here
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exit 99
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