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#!/bin/sh
set -e
servicedir=$SVDIR
test -n "$servicedir" || servicedir=/etc/service
err() { >&2 printf '%s\n\n' "$*"; exit 1; }
fatal() { err "${0##*/}: fatal: $*"; }
warn() { err "${0##*/}: warning: $*"; }
usage() {
err "Usage: ${0##*/} --add|--remove <service-directory> [<service-name>]
${0##*/} --list|--check [<service-name>]"
}
opt=$1
svdir=${2%/}
sv=$3
test -z "${opt##-*}" || usage
case "$opt" in
-c|--check) exec >/dev/null; exec 2>/dev/null; opt=-l;;
esac
case "$opt" in
-l|--list)
test -n "$svdir" || exec ls -1 "$servicedir"
test -h "$servicedir"/"$svdir" || err "Service $svdir not registered."
printf '%s -> %s\n' "$svdir" "$(readlink "$servicedir"/"$svdir")"
exit 0
;;
esac
test -n "$svdir" || usage
test -d "$svdir" ||
fatal "$svdir does not exist, or is not a directory."
test -z "${svdir%%/*}" ||
fatal "The <service-directory> must start with a slash."
test -n "$sv" || sv=${svdir##*/}
test -n "${sv##.*}" ||
fatal "The <service-name> must not start with a dot."
test "$sv" = "${sv#*/}" ||
fatal "The <service-name> must not contain a slash."
case "$opt" in
-a|--add)
test "$(id -u)" = 0 || fatal "${0##*/} -a must be run by root."
if test -e "$servicedir"/"$sv"; then
test -h "$servicedir"/"$sv" ||
fatal "$servicedir/$sv exists, but is not a symbolic link."
test "$(readlink "$servicedir"/"$sv")" = "$svdir" ||
test "$(readlink "$servicedir"/"$sv")" = "$svdir"/ ||
fatal "$servicedir/$sv exists, but doesn't point to $svdir."
printf '%s\n' "Service $sv already added."
exit 0
fi
! sv stat "$svdir" >/dev/null 2>&1 ||
fatal "$svdir is currently controlled by a runsv(8) process."
if test "${svdir#/etc/}" != "$svdir"; then
if test ! -h "$svdir"/supervise; then
rm -rf "$svdir"/supervise
ln -s /var/lib/supervise/"$sv" "$svdir"/supervise
fi
if test -d "$svdir"/log && test ! -h "$svdir"/log/supervise; then
rm -rf "$svdir"/log/supervise
ln -s /var/lib/supervise/"$sv".log "$svdir"/log/supervise
fi
fi
ln -s "$svdir" "$servicedir"/"$sv"
printf '%s\n' "Service $sv added."
exit 0
;;
-r|--remove)
test "$(id -u)" = 0 || fatal "${0##*/} -r must be run by root."
test -e "$servicedir"/"$sv" ||
warn "$servicedir/$sv does not exist."
test -h "$servicedir"/"$sv" ||
fatal "$servicedir/$sv is not a symbolic link."
test "$svdir" = "$(readlink "$servicedir"/"$sv")" ||
test "$svdir"/ = "$(readlink "$servicedir"/"$sv")" ||
fatal "$servicedir/$sv does not point to $svdir."
rm -f "$servicedir"/"$sv"
printf '%s %s\n' \
"Service $sv removed," \
"the service daemon received the TERM and CONT signals."
exit 0
;;
*) usage
;;
esac
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