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| author | Laurent Bercot <ska-skaware@skarnet.org> | 2023-09-11 08:13:01 +0000 |
|---|---|---|
| committer | Laurent Bercot <ska@appnovation.com> | 2023-09-11 08:13:01 +0000 |
| commit | bc3863eaf3e4ae92eac8cd3ce0ca9dcb8915fc36 (patch) | |
| tree | 9c6d891677e1d48aa4219636bff1c103d9509a7d /doc/libs6/s6lockd.html | |
| parent | ddc088fba6016ae839afaa208b0a441869dc936f (diff) | |
| download | s6-bc3863eaf3e4ae92eac8cd3ce0ca9dcb8915fc36.tar.xz | |
Better s6-setlock; delete the s6lock subsystem
Signed-off-by: Laurent Bercot <ska@appnovation.com>
Diffstat (limited to 'doc/libs6/s6lockd.html')
| -rw-r--r-- | doc/libs6/s6lockd.html | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/doc/libs6/s6lockd.html b/doc/libs6/s6lockd.html deleted file mode 100644 index 089de57..0000000 --- a/doc/libs6/s6lockd.html +++ /dev/null @@ -1,75 +0,0 @@ -<html> - <head> - <meta name="viewport" content="width=device-width, initial-scale=1.0" /> - <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> - <meta http-equiv="Content-Language" content="en" /> - <title>s6: the s6lockd internal program</title> - <meta name="Description" content="s6: the s6lockd internal program" /> - <meta name="Keywords" content="s6 s6lockd lockd asynchronous timed lock daemon" /> - <!-- <link rel="stylesheet" type="text/css" href="//skarnet.org/default.css" /> --> - </head> -<body> - -<p> -<a href="index.html">libs6</a><br /> -<a href="../">s6</a><br /> -<a href="//skarnet.org/software/">Software</a><br /> -<a href="//skarnet.org/">skarnet.org</a> -</p> - -<h1> The <tt>s6lockd</tt> program </h1> - -<p> -<tt>s6lockd</tt> is the s6lock daemon. It is a program that manages -a set of lock files in a given directory, and associated timeouts. -</p> - -<h2> Interface </h2> - -<p> - s6lockd does not fork, does not background itself automatically, -and does not use syslog. It is not meant to be run directly by the -user: it will be spawned by the -<a href="s6lock.html">s6lock client library</a>. -</p> - -<p> - There are 2 ways to use s6lockd: -</p> - -<ol> - <li> Use the <tt>s6lock_startf()</tt> library call. -An <tt>s6lockd</tt> child will then be spawned from your -calling process, and automatically reaped when you call -<tt>s6lock_end()</tt>. It requires care with applications that -trap SIGCHLD. It also requires care with lock file permissions: -an s6lockd instance might not be able -to open a lock file created by a former instance run by another -client with different permissions. </li> - <li> Use the <tt>s6lock_start()</tt> library call, together with a -<a href="../localservice.html">s6lockd service</a>. -For once, <em>this is the recommended setup</em>: s6lockd creates empty -lock files, and having all s6lockd instances run under the same user -simplifies permissions management considerably. </li> -</ol> - -<p> -When run as a service, s6lockd has no "standalone" mode: it is -designed to work with a Unix -domain super-server, like -<a href="../s6-ipcserver.html">s6-ipcserver</a>. -s6lockd follows the <a href="https://cr.yp.to/proto/ucspi.txt">UCSPI</a> -interface, it can be directly executed from the super-server. -</p> - -<h2> Notes </h2> - -<ul> - <li> Unix does not natively provide a way to stop blocking on a lock -acquisition after a timeout. To emulate such behaviour, s6lockd actually -spawns an <a href="s6lockd-helper.html">s6lockd-helper</a> child per -requested lock. </li> -</ul> - -</body> -</html> |