Re: Devuan

rc.d se contente de lancer les daemons dans un ordre précis, défini par le nom du fichier.
Ce qui veut dire (si je ne me trompe pas):

• pas de gestion des dépendances (par example, sur ma Debian, ssh ne vérifie pas que le réseau est accessible);
• démarrage des daemon en série, ce qui freine le démarrage du système (debian à bien un paquet starpar, mais il a beau être installé, si jamais je n'ai pas de DHCP le boot mets 3 plombes juste à cause de ça...);
• si un daemon tombe, il n'est pas relancé automatiquement;
• c'est une question de goût, mais, sérieux, 108 lignes de bourne shell pour gérer mpd (c'est un example, et je n'inclue pas les fichiers inclus)?
• double fork: les process doivent s'échapper sinon le démarrage est bloqué...

La plupart des distros ont opté pour systemd, personnellement je préfère runit (malgré que gérer les inter-dépendances soit pénible, il faut que je teste nosh pour ça).

Pour info, avec rc.d, le script Debian pour lancer isc-dhcp-server (non, ce n'est pas le pire, juste 1 au hasard):

#!/bin/sh
### BEGIN INIT INFO
# Provides: isc-dhcp-server
# Required-Start: $remote_fs $network $syslog
# Required-Stop: $remote_fs $network $syslog
# Should-Start: $local_fs slapd $named
# Should-Stop: $local_fs slapd
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: DHCP server
# Description: Dynamic Host Configuration Protocol Server
### END INIT INFO
PATH=/sbin:/bin:/usr/sbin:/usr/bin
test -f /usr/sbin/dhcpd || exit 0
DHCPD_DEFAULT="${DHCPD_DEFAULT:-/etc/default/isc-dhcp-server}"
# It is not safe to start if we don't have a default configuration...
if [ ! -f "$DHCPD_DEFAULT" ]; then
 echo "$DHCPD_DEFAULT does not exist! - Aborting..."
 if [ "$DHCPD_DEFAULT" = "/etc/default/isc-dhcp-server" ]; then
 echo "Run 'dpkg-reconfigure isc-dhcp-server' to fix the problem."
 fi
 exit 0
fi
. /lib/lsb/init-functions
# Read init script configuration
[ -f "$DHCPD_DEFAULT" ] && . "$DHCPD_DEFAULT"
NAME4=dhcpd
NAME6=dhcpd6
DESC4="ISC DHCPv4 server"
DESC6="ISC DHCPv6 server"
# use already specified config file or fallback to defaults
DHCPDv4_CONF=${DHCPDv4_CONF:-/etc/dhcp/dhcpd.conf}
DHCPDv6_CONF=${DHCPDv6_CONF:-/etc/dhcp/dhcpd6.conf}
# try to read pid file name from config file or fallback to defaults
if [ -z "$DHCPDv4_PID" ]; then
 DHCPDv4_PID=$(sed -n -e 's/^[ \t]*pid-file-name[ \t]*"\(.*\)"[ \t]*;.*$/1円/p' < "$DHCPDv4_CONF" 2>/dev/null | head -n 1)
fi
if [ -z "$DHCPDv6_PID" ]; then
 DHCPDv6_PID=$(sed -n -e 's/^[ \t]*dhcpv6-pid-file-name[ \t]*"\(.*\)"[ \t]*;.*$/1円/p' < "$DHCPDv6_CONF" 2>/dev/null | head -n 1)
fi
DHCPDv4_PID="${DHCPDv4_PID:-/var/run/dhcpd.pid}"
DHCPDv6_PID="${DHCPDv6_PID:-/var/run/dhcpd6.pid}"
test_config()
{
 VERSION="1ドル"
 CONF="2ドル"
 if ! /usr/sbin/dhcpd -t $VERSION -q -cf "$CONF" > /dev/null 2>&1; then
 echo "dhcpd self-test failed. Please fix $CONF."
 echo "The error was: "
 /usr/sbin/dhcpd -t $VERSION -cf "$CONF"
 exit 1
 fi
}
check_status()
{
 OPTION="1ドル"
 PIDFILE="2ドル"
 NAME="3ドル"
 if [ ! -r "$PIDFILE" ]; then
 test "$OPTION" != -v || echo "$NAME is not running."
 return 3
 fi
 if read pid < "$PIDFILE" && ps -p "$pid" > /dev/null 2>&1; then
 test "$OPTION" != -v || echo "$NAME is running."
 return 0
 else
 test "$OPTION" != -v || echo "$NAME is not running but $PIDFILE exists."
 return 1
 fi
}
start_daemon()
{
 VERSION="1ドル"
 CONF="2ドル"
 NAME="3ドル"
 PIDFILE="4ドル"
 DESC="5ドル"
 shift 5
 INTERFACES="$*"
 test_config "$VERSION" "$CONF"
 log_daemon_msg "Starting $DESC" "$NAME"
 if [ -e "$PIDFILE" ]; then
 log_failure_msg "dhcpd service already running (pid file $PIDFILE currenty exists)"
 exit 1
 fi
 touch /var/lib/dhcp/$NAME.leases
 start-stop-daemon --start --quiet --pidfile $PIDFILE \
 --exec /usr/sbin/dhcpd -- $VERSION -q -cf $CONF $INTERFACES
 sleep 2
 if check_status -q $PIDFILE $NAME; then
 log_end_msg 0
 else
 log_failure_msg "check syslog for diagnostics."
 log_end_msg 1
 exit 1
 fi
}
stop_daemon()
{
 if check_status -q $DHCPDv4_PID $NAME4; then
 log_daemon_msg "Stopping $DESC4" "$NAME4"
 start-stop-daemon --stop --quiet --pidfile $DHCPDv4_PID
 log_end_msg $?
 rm -f "$DHCPDv4_PID"
 fi
 if check_status -q $DHCPDv6_PID $NAME6; then
 log_daemon_msg "Stopping $DESC6" "$NAME6"
 start-stop-daemon --stop --quiet --pidfile $DHCPDv6_PID
 log_end_msg $?
 rm -f "$DHCPDv6_PID"
 fi
}
case "1ドル" in
 start)
 if test -n "$INTERFACES" -a -z "$INTERFACESv4"; then
 echo "DHCPv4 interfaces are no longer set by the INTERFACES variable in" >&2
 echo "/etc/default/isc-dhcp-server. Please use INTERFACESv4 instead." >&2
 echo "Migrating automatically for now, but this will go away in the future." >&2
 INTERFACESv4="$INTERFACES"
 fi
 if test -n "$INTERFACESv4"; then
 echo "Launching IPv4 server only."
 start_daemon "-4" "$DHCPDv4_CONF" "$NAME4" \
 "$DHCPDv4_PID" "$DESC4" "$INTERFACESv4"
 fi
 if test -n "$INTERFACESv6"; then
 echo "Launching IPv6 server only."
 start_daemon "-6" "$DHCPDv6_CONF" "$NAME6" \
 "$DHCPDv6_PID" "$DESC6" "$INTERFACESv6"
 fi
 if test -z "$INTERFACESv4" -a -z "$INTERFACESv6"; then
 echo "Launching both IPv4 and IPv6 servers (please configure INTERFACES in /etc/default/isc-dhcp-server if you only want one or the other)."
 start_daemon "-4" "$DHCPDv4_CONF" "$NAME4" \
 "$DHCPDv4_PID" "$DESC4" ""
 start_daemon "-6" "$DHCPDv6_CONF" "$NAME6" \
 "$DHCPDv6_PID" "$DESC6" ""
 fi
 ;;
 stop)
 stop_daemon
 ;;
 restart | force-reload)
 0ドル stop
 sleep 2
 0ドル start
 if [ "$?" != "0" ]; then
 exit 1
 fi
 ;;
 status)
 if test -n "$INTERFACES" -a -z "$INTERFACESv4"; then
 INTERFACESv4="$INTERFACES"
 fi
 if test -n "$INTERFACESv4"; then
 echo -n "Status of $DESC4: "
 check_status -v $DHCPDv4_PID $NAME4 || exit $?
 fi
 if test -n "$INTERFACESv6"; then
 echo -n "Status of $DESC6: "
 check_status -v $DHCPDv6_PID $NAME6 || exit $?
 fi
 ;;
 *)
 echo "Usage: 0ドル {start|stop|restart|force-reload|status}"
 exit 1
esac
exit 0

Le fichier run de voidlinux pour dhcpd:

#!/bin/sh
[ -r conf ] && . ./conf
mkdir -p /var/lib/dhcp/
touch /var/lib/dhcp/dhcpd.leases
exec dhcpd -f ${OPTS:=-4 -q -pf /run/dhcpd4.pid}