149 lines
2.9 KiB
Bash
149 lines
2.9 KiB
Bash
#!/bin/bash
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# This script is called by "systemctl enable/disable" when the given unit is a
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# SysV init.d script. It needs to call the distribution's mechanism for
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# enabling/disabling those, such as chkconfig, update-rc.d, or similar. This can
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# optionally take a --root argument for enabling a SysV init script in a chroot
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# or similar.
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#
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# chkconfig(8) and insserv(8) are no more available hence let's do the bare
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# minimum and create/remove the symlinks for the well known runlevels and
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# nothing more. Note that we don't take care of enabling/disabling the service
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# dependencies as the sysv-generator will take care of them for us (openSUSE
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# specific).
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#
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set -e
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usage() {
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echo >&2 "Usage: $0 [--quiet] [--root=path] enable|disable|is-enabled <sysv script name>"
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exit 1
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}
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info() {
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$quiet || echo "$*"
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}
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die() {
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echo >&2 "error: $*, aborting."
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exit 1
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}
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declare -A lsb_header
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check_runlevels() {
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for l in $*; do
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# Sanity check
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case $l in
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0|1|2|3|4|5|6) continue ;;
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*) return 1
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esac
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done
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}
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load_initscript() {
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local found_lsb_start_marker=false
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local found_lsb_end_marker=false
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[ -r $1 ] || die "initscript /etc/init.d/$1 can't be read"
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lsb_header=()
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while read line; do
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# skip anything that is not a comment
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[[ "$line" =~ ^# ]] || continue
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if ! $found_lsb_start_marker; then
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[ "$line" == "### BEGIN INIT INFO" ] &&
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found_lsb_start_marker=true
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continue
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fi
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line=$(echo ${line:1})
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case "$line" in
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Default-Start:*)
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levels=$(echo ${line:14})
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check_runlevels $levels ||
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die "Invalid runlevels specified in $line"
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lsb_header[Default-Start]=$levels
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;;
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"## END INIT INFO")
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found_lsb_end_marker=true
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break ;;
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esac
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done <$1
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$found_lsb_end_marker ||
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die "malformated LSB header in $1: missing LSB end marker"
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}
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enable_initscript() {
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load_initscript $1
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for l in ${lsb_header[Default-Start]}; do
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symlink="$(pwd)/rc${l}.d/S50$1"
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info "ln -sf ../$1 $symlink"
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ln -sf ../$1 "$symlink"
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done
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}
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disable_initscript() {
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for symlink in rc*.d/[SK]*; do
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if [ -L $symlink ] && [ $(readlink $symlink) = "../$1" ]; then
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info "rm $(pwd)/$symlink"
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rm $symlink
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fi
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done
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}
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is_initscript_enabled() {
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for symlink in rc*.d/S*; do
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[ -L $symlink ] && [ $(readlink $symlink) = "../$1" ] &&
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return 0
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done
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return 1
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}
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root=
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quiet=false
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# parse options
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eval set -- "$(getopt --name $(basename $0) -o hqr: --long help,quiet,root: -- "$@")"
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while true; do
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case "$1" in
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-h|--help)
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usage ;;
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-r|--root)
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shift
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root=$1 ;;
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-q|--quiet)
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quiet=true ;;
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--)
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shift
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break ;;
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*)
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usage ;;
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esac
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shift
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done
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[ $# -eq 2 ] || usage
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action=$1
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name=$2
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sysvinit_path=$(realpath -q -e $root/etc/init.d) ||
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die "$root/etc/init.d: no such file or directory"
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cd $sysvinit_path
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case "$action" in
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enable) enable_initscript $name ;;
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disable) disable_initscript $name ;;
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is-enabled) is_initscript_enabled $name ;;
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*) usage
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esac
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