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Diffstat (limited to 'doc/s6-svscan.html')
| -rw-r--r-- | doc/s6-svscan.html | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/doc/s6-svscan.html b/doc/s6-svscan.html index 4bb943b..665fd75 100644 --- a/doc/s6-svscan.html +++ b/doc/s6-svscan.html @@ -27,7 +27,7 @@ the root or a branch of a <em>supervision tree</em>. <h2> Interface </h2> <pre> - s6-svscan [ -S | -s ] [ -c max ] [ -t <em>rescan</em> ] [ <em>scandir</em> ] + s6-svscan [ -S | -s ] [ -d <em>notif</em> ] [ -c max ] [ -t <em>rescan</em> ] [ <em>scandir</em> ] </pre> <ul> @@ -62,6 +62,17 @@ execution. </li> <li> <tt>-S </tt> : do not divert signals. This is the default for now; it may change in a future version of s6. </li> <li> <tt>-s </tt> : divert signals - see below. </li> + <li> <tt>-d <em>notif</em></tt> : notify readiness on file descriptor +<em>notif</em>. When s6-svscan is ready to accept commands from +<a href="s6-svscanctl.html">s6-svscanctl</a>, it will write a newline to <em>notif</em>. +<em>notif</em> cannot be lesser than 3. By default, no notification is sent. Please +note that using this option signals <em>shallow readiness</em>: s6-svscan being +"ready" only means that it is ready to accept commands. It <em>does not mean</em> +that all the services it launches at start are themselves ready, or even started, or +even that the relevant <a href="s6-supervise.html">s6-supervise</a> processes have +been started. If you need to test for <em>deep readiness</em>, meaning that all the +services in the supervision tree have been started and are ready, you cannot rely +on this option. </li> <li> <tt>-c <em>max</em></tt> : maintain services for up to <em>max</em> service directories. Default is 500. Lower limit is 2. There is no upper limit, but: <ul> |