sv - control and manage services monitored by runsv(8)

sv [-v] [-w sec] command services

/etc/init.d/service [-w sec] command

The sv program reports the current status and controls the state of services monitored by the runsv(8) supervisor.

services consists of one or more arguments, each argument naming a directory service used by runsv(8). If service doesn't start with a dot or slash, it is searched in the default services directory /var/service/, otherwise relative to the current directory.

command is one of up, down, status, once, pause, cont, hup, alarm, interrupt, 1, 2, term, kill, or exit, or start, stop, restart, shutdown, force-stop, force-reload, force-restart, force-shutdown.

The sv program can be sym-linked to /etc/init.d/ to provide an LSB init script interface. The service to be controlled then is specified by the base name of the ``init script''.

status

Report the current status of the service, and the appendant log service if available, to standard output.

up

If the service is not running, start it. If the service stops, restart it.

down

If the service is running, send it the TERM signal, and the CONT signal. If ./run exits, start ./finish if it exists. After it stops, do not restart service.

once

If the service is not running, start it. Do not restart it if it stops.

pause cont hup alarm interrupt quit 1 2 term kill

If the service is running, send it the STOP, CONT, HUP, ALRM, INT, QUIT, USR1, USR2, TERM, or KILL signal respectively.

exit

If the service is running, send it the TERM signal, and the CONT signal. Do not restart the service. If the service is down, and no log service exists, runsv(8) exits. If the service is down and a log service exists, send the TERM signal to the log service. If the log service is down, runsv(8) exits. This command is ignored if it is given to an appendant log service.

sv actually looks only at the first character of these commands.

Commands compatible to LSB init script actions

Additional Commands

-v

If the command is up, down, term, once, cont, or exit, then wait up to 7 seconds for the command to take effect. Then report the status or timeout.

-w sec Override the default timeout of 7 seconds with sec seconds. This option implies -v.

SVDIR

The environment variable $SVDIR overrides the default services directory /var/service/.

SVWAIT

The environment variable $SVWAIT overrides the default 7 seconds to wait for a command to take effect. It is overridden by the -w option.

sv exits 0, if the command was successfully sent to all services, and, if it was told to wait, the command has taken effect to all services.

For each service that caused an error (e.g. the directory is not controlled by a runsv(8) process, or sv timed out while waiting), sv increases the exit code by one and exits non zero. The maximum is 99. sv exits 100 on error.

If sv is called with a base name other than sv, it exits 1 on timeout or trouble sending the command. If the command is status, it exits 3 if the service is down, and 4 if the status is unknown. It exits 2 on wrong usage, and 151 on error.

runsv(8), chpst(8), svlogd(8), runsvdir(8), runsvchdir(8), runit(8), runit-init(8)

http://smarden.org/runit/

Gerrit Pape <pape@smarden.org>