> > IMHO daemontools for windows, if ported, can handle quite a variety
> > of different setups, including one needed by openvpn. Then you can
> > install it as part of openvpn install.
>
> If the only issue we had to solve here was how a normal user should be
> able to spawn openvpn processes, I agree we should use already existing
> software to solve this.
>
> However, this issue has grown abit larger than that. Our gui client needs
> to:
>
> * Scan a directory for configuration files.
> * A way to spawn processes (preferable portable)
> * Maintain a table over on which port it can reach the openvpn
> process management interface.
> * Monitor that all openvpn processes are still alive
> * Connect to all the openvpn processes and get status info
:) I will append 'man svscan' and 'man supervise'. Judge for
yourself how many of your points are covered by them.
Also I'll append my current 'ps -AH e' output. You can see there how
completely different daemons are controlled by those tools.
> There is no fancy hardcoded things we are talking about, so it could all
> reside in the gui client, however I liked the idea of moving this
> functionallity into a portable service manager.
>
> I need to code this regardless if we put it in the gui agent itself, or in
> this service manager, so I think it makes more sence to put the effort
> into a deamon from which other gui clients can benefit on all platforms,
> instead of into my not-so-portable gui.
No need to code it. Port it to Windows. That's all.
--
vda
svscan(8) svscan(8)
NAME
svscan - starts and monitors a collection of services
SYNOPSIS
svscan [ directory ]
DESCRIPTION
svscan starts one supervise(8) process for each subdirectory of the
current directory, up to a limit of 1000 subdirectories. svscan skips
subdirectory names starting with dots. supervise(8) must be in svs-
can's path.
svscan optionally starts a pair of supervise(8) processes, one for a
subdirectory s, one for s/log, with a pipe between them. It does this
if the name s is at most 255 bytes long and s/log exists. (In versions
0.70 and below, it does this if s is sticky.) svscan needs two free
descriptors for each pipe.
Every five seconds, svscan checks for subdirectories again. If it sees
a new subdirectory, it starts a new supervise(8) process. If it sees an
old subdirectory where a supervise(8) process has exited, it restarts
the supervise(8) process. In the log case it reuses the same pipe so
that no data is lost.
svscan is designed to run forever. If it has trouble creating a pipe or
running supervise(8), it prints a message to stderr; it will try again
five seconds later.
If svscan is given a command-line argument directory, it switches to
that directory when it starts.
SEE ALSO
supervise(8), svc(8), svok(8), svstat(8), svscanboot(8), readprocti-
tle(8), fghack(8), pgrphack(8), multilog(8), tai64n(8), tai64nlocal(8),
setuidgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)
http://cr.yp.to/daemontools.html
svscan(8)
supervise(8) supervise(8)
NAME
supervise - starts and monitors a service.
SYNOPSIS
supervise s
DESCRIPTION
supervise switches to the directory named s and starts ./run. It
restarts ./run if ./run exits. It pauses for a second after starting
./run, so that it does not loop too quickly if ./run exits immediately.
If the file s/down exists, supervise does not start ./run immediately.
You can use svc(8) to start ./run and to give other commands to super-
vise.
supervise maintains status information in a binary format inside the
directory s/supervise, which must be writable to supervise. The status
information can be read by svstat(8).
supervise may exit immediately after startup if it cannot find the
files it needs in s or if another copy of supervise is already running
in s. Once supervise is successfully running, it will not exit unless
it is killed or specifically asked to exit. You can use svok(8) to
check whether supervise is successfully running. You can use svscan(8)
to reliably start a collection of supervise processes.
SEE ALSO
svc(8), svok(8), svstat(8), svscanboot(8), svscan(8), readproctitle(8),
fghack(8), pgrphack(8), multilog(8), tai64n(8), tai64nlocal(8), setu-
idgid(8), envuidgid(8), envdir(8), softlimit(8), setlock(8)
http://cr.yp.to/daemontools.html
supervise(8)
# ps -AH e
PID TTY STAT TIME COMMAND
1 ? S 0:01 /bin/sh /init
2 ? SWN 0:00 [ksoftirqd/0]
3 ? SW< 0:00 [events/0]
4 ? SW< 0:00 [khelper]
20 ? SW< 0:00 [kblockd/0]
46 ? SW 0:00 [pdflush]
47 ? SW 0:00 [pdflush]
49 ? SW< 0:00 [aio/0]
479 ? SW< 0:00 [reiserfs/0]
48 ? SW 0:00 [kswapd0]
50 ? SW 0:00 [cifsoplockd]
214 ? SW 0:00 [kseriod]
392 ? S 0:00 devfsd /dev
681 ? S 0:00 rpc.portmap
993 ? S 0:00 svscan /var/service
995 ? S 0:00 supervise fw
996 ? S 0:00 supervise gpm
997 ? S 0:00 gpm -D -2 -m /dev/psaux -t ps2
1007 ? S 0:00 supervise ntp
1011 ? S 0:00 /bin/sh ./run
2274 ? S< 0:00 ntpdate -b -t 10 -p 4 -k /dev/null 1.1.1.1
PWD=/.local/var/service/ntp SHLVL=1 _=/usr/bin/ntpdate
1008 ? S 0:00 supervise log
1012 ? S 0:00 multilog t n5 /var/log/service/ntp
1009 ? S 0:00 supervise top
1036 ? S 0:19 top c s TERM=linux
1020 ? S 0:00 supervise ups
1021 ? S 0:00 supervise log
1022 ? S 0:00 multilog t =/var/log/service/ups/last.out
/var/log/service/ups
1027 ? S 0:00 supervise klog
1031 ? S 0:00 klogd -n -c 3 -x
1028 ? S 0:00 supervise once
1040 ? S 0:00 supervise pptp
1041 ? S 0:00 supervise log
1056 ? S 0:00 multilog t /var/log/service/pptp
1047 ? S 0:00 supervise sshd
1048 ? S 0:00 tcpserver -v -R -H -l 0 -c 40 0.0.0.0 ssh
setuidgid root sshd -i -e -u0
1049 ? S 0:00 supervise log
1091 ? S 0:00 multilog t /var/log/service/sshd
1064 ? S 0:00 supervise httpd
1075 ? S 0:00 tcpserver -v -R -H -l 0 -c 40 0.0.0.0 www
setuidgid apache httpd -X -f /.local/var/service/httpd/httpd.conf
1065 ? S 0:00 supervise log
1076 ? S 0:00 multilog t /var/log/service/httpd
1066 ? S 0:00 supervise nmlog
1071 ? S 0:00 /bin/sh ./run
1072 ? S 0:00 /bin/sh ./run
1073 ? S 0:00 nmeter c l x lx p lp m lm nif nlo d120000
1074 ? S 0:00 logger -t
1067 ? S 0:00 supervise mysql
1068 ? S 0:00 /bin/sh ./run
1128 ? S 0:00 mysqld --user=mysql
--datadir=/var/app/mysql-3.23.52/data --tmpdir=/var/app/mysql-3.23.52/tmp
--socket=/.lo
1069 ? S 0:00 supervise log
1070 ? S 0:00 multilog t /var/log/service/mysql
1087 ? S 0:00 supervise pgsql
1088 ? S 0:00 supervise log
1101 ? S 0:00 multilog t /var/log/service/pgsql
1113 ? S 0:00 supervise serial0
1115 ? S 0:00 supervise dnscache_local
1130 ? S 0:00 ./dnscache ROOT=./root IP=0.0.0.0
IPSEND=0.0.0.0 FORWARDONLY=1 DATALIMIT=2000000 CACHESIZE=1000000 GID=50 UID
1116 ? S 0:00 supervise log
1132 ? S 0:00 multilog t /var/log/service/dnscache_local
1117 ? S 0:00 supervise nmeter
1138 ? S 0:00 nmeter t c l x lx p lp f lf b lb m lm nif
nlo
1118 ? S 0:00 supervise ovpn-1
1297 ? S 0:00 openvpn --secret
/.local/var/service/ovpn-1/key --dev tun --proto udp --port 8006 --remote
1.1.4.1 --ifconfig
1119 ? S 0:00 supervise log
1152 ? S 0:00 multilog /var/log/service/ovpn-1
1163 ? S 0:00 supervise getty_tty1
1164 ? S 0:00 supervise getty_tty2
1870 vc/2 S 0:00 agetty 38400 /dev/tty2 linux TERM=linux
1165 ? S 0:00 supervise getty_tty3
1218 vc/3 S 0:00 agetty 38400 /dev/tty3 linux TERM=linux
1166 ? S 0:00 supervise getty_tty4
1227 vc/4 S 0:00 agetty 38400 /dev/tty4 linux TERM=linux
1167 ? S 0:00 supervise getty_tty5
1231 vc/5 S 0:00 agetty 38400 /dev/tty5 linux TERM=linux
1168 ? S 0:00 supervise getty_tty6
1232 vc/6 S 0:00 agetty 38400 /dev/tty6 linux TERM=linux
1169 ? S 0:00 supervise getty_tty7
1233 vc/7 S 0:00 agetty 38400 /dev/tty7 linux TERM=linux
1170 ? S 0:00 supervise getty_tty8
1222 vc/8 S 0:00 agetty 38400 /dev/tty8 linux TERM=linux
1171 ? S 0:00 supervise syslog
1172 ? S 0:00 syslogd -n -f
/.local/var/service/syslog/syslogd.conf
1247 ? S 0:00 multilog /var/log/syslog/auth.all
1252 ? S 0:00 multilog /var/log/syslog/daemon.all
1255 ? S 0:00 multilog /var/log/syslog/kern.all
1258 ? S 0:00 multilog /var/log/syslog/mark.all
1261 ? S 0:00 multilog /var/log/syslog/syslog.all
1264 ? S 0:00 multilog /var/log/syslog/user.all
1267 ? S 0:00 multilog /var/log/syslog/7.debug
1270 ? S 0:00 multilog /var/log/syslog/6.info
1273 ? S 0:00 multilog /var/log/syslog/5.notice
1276 ? S 0:00 multilog /var/log/syslog/4.warning
1279 ? S 0:00 multilog /var/log/syslog/3.err
1282 ? S 0:00 multilog /var/log/syslog/2.crit
1285 ? S 0:00 multilog /var/log/syslog/1.alert
1288 ? S 0:00 multilog /var/log/syslog/0.emerg
1176 ? S 0:00 supervise watch_quasar
1177 ? S 0:00 supervise automount
1179 ? S 0:00 /bin/sh ./run
1306 ? S 0:00 sleep 32000
1178 ? S 0:00 supervise watcher
1209 ? S 0:00 /bin/sh ./run
2278 ? S 0:00 sleep 33
