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Diffstat (limited to 'doc/s6-svc.html')
| -rw-r--r-- | doc/s6-svc.html | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/doc/s6-svc.html b/doc/s6-svc.html index 4668a45..24b139d 100644 --- a/doc/s6-svc.html +++ b/doc/s6-svc.html @@ -60,12 +60,15 @@ receive the signal aimed to kill them) and do not restart it. The SIGTERM default can be changed by editing the <tt>./down-signal</tt> file in the <a href="servicedir.html">service directory</a>. </li> <li> <tt>-D</tt> : down, and create a <tt>./down</tt> file so the -service does not restart automatically if the supervisor dies. </li> +service does not restart automatically if the supervisor dies. This +option is mostly used by automated systems working on top of s6; as a +human user, you probably don't need it. </li> <li> <tt>-u</tt> : up. If the supervised process is down, start it. Automatically restart it when it dies. </li> <li> <tt>-U</tt> : up, and remove any <tt>./down</tt> file that may exist, in order to make sure the service is automatically restarted even -if the supervisor dies. </li> +if the supervisor dies. This option is mostly used by automated systems +working on top of s6; as a human user, you probably don't need it. </li> <li> <tt>-x</tt> : exit. When the service is asked to be down and the supervised process dies, s6-supervise will exit too. This command should normally never be used on a working system. Note that if this command is @@ -171,6 +174,15 @@ they do nothing, and in particular they do not instruct s6-supervise to bring th service up. Consequently, <tt>s6-svc -rwr <em>servicedir</em></tt> may wait forever for the service to be up, if it is currently wanted down. To avoid that, make sure your service is wanted up by using <tt>s6-svc -ruwr <em>servicedir</em></tt> instead. </li> + <li> The <tt>U</tt> and <tt>D</tt> letters, which convey the same idea as <tt>u</tt> +and <tt>d</tt> (<em>up</em> and <em>down</em>) but with added emphasis, do not have the +same meaning in the <tt>-U</tt>/<tt>-D</tt> and <tt>-wU</tt>/<tt>-wD</tt> options. +In the <tt>-U</tt>/<tt>-D</tt> case, they mean "change the external service configuration +to match what the supervisor has been instructed that the starting state of the service +should be". In the <tt>-wU</tt>/<tt>-wD</tt> case, they mean "wait until the service +has reached the wanted state <em>and also</em> is ready" (or "ready to be started again" +for <tt>-wD</tt>). The thing to remember is "it's up/down, with something more", but +the "something" isn't the same. </li> </ul> </body> |