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| author | PS <p@0x53.net> | 2026-02-07 10:20:30 +0100 |
|---|---|---|
| committer | PS <p@0x53.net> | 2026-02-07 10:20:30 +0100 |
| commit | 5e95d487982b9362b544139b98d1da55fa6ef78c (patch) | |
| tree | 1abf6d91f9e6d0b6d0ac7b7d759663f2531eb51b /doc/bin/user-tmpfs.html | |
| parent | f7df2f7bb6abbea365cccb1345dcf1a1b7a80797 (diff) | |
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diff --git a/doc/bin/user-tmpfs.html b/doc/bin/user-tmpfs.html new file mode 100644 index 0000000..3c22c57 --- /dev/null +++ b/doc/bin/user-tmpfs.html @@ -0,0 +1,104 @@ +<!DOCTYPE html> +<html> + <head> + <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> + <meta http-equiv="Content-Language" content="en" /> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> + <title>user-tmpfs</title> + <meta name="Description" content="Script to prepare a user owned tmpfs to house a user supervision tree." /> + <meta name="Keywords" content="goetia tmpfs user supervision tree" /> + </head> + <header> + <p> + <a href="//0x53.net/software/goetia/goetia-base">goetia-base</a> + <br /> + <a href="//0x53.net/software/goetia">goetia</a> + <br /> + <a href="//0x53.net/software">Software</a> + <br /> + <a href="//0x53.net">0x53.net</a> + </p> + </header> + <body> + <h1>The user-tmpfs program</h1> + <p> + The user-tmpfs program prepares + a user owned tmpfs for + the user defined in the <code>USER</code> + environment variable. + The user owned tmpfs is created at + <code><var>@tmpfsdir@</var>/<var>@usrrundir@</var>/<var>${USER}</var></code>. + </p> + <h2>Interface</h2> + <pre> user-tmpfs</pre> + <ul> + <li> + user-tmpfs takes no arguments. + </li> + <li> + It reads the <code>USER</code> environment variable, + if it is empty it exits 100. + </li> + <li> + It reads the <code>USER_TMPFSDIR_SIZE</code> environment variable, + defaulting to <code>64m</code> if undefined. + </li> + <li> + It creates the directory + <code><var>@tmpfsdir@</var>/<var>@usrrundir@</var>/<var>${USER}</var></code>. + </li> + <li> + It mounts a tmpfs + of size <code>USER_TMPFSDIR_SIZE</code> + with its root owned bi <code>USER</code> + and mode <code>0755</code> + at <code><var>@tmpfsdir@</var>/<var>@usrrundir@</var>/<var>${USER}</var></code>. + </li> + </ul> + <h2>Exit codes</h2> + <ul> + <li> + 100 if a critical environment variable is missing. + </li> + <li> + Since user-tmpfs is an + <a href="https://skarnet.org/software/execline/">execline</a> + script, it exits with an approximation + of employed program that failed. + </li> + <li> + user-tmpfs mostly uses + <a href="https://skarnet.org/software/execline/">execline</a> + and + <a href="https://skarnet.org/software/s6/">s6</a> + software, the exit behaviour of which can be looked up on + their respective documentation. + </li> + <li> + See also: + <a href="https://skarnet.org/software/execline/exitcodes.html">execline exit code handling</a>. + </li> + </ul> + <h2>Options</h2> + <ul> + <li> + There are no otions to user-tmpfs. + </li> + </ul> + <h2>Notes</h2> + <p> + user-tmpfs is intended to be used in a boot time + <a href="//0x53.net/software/goetia/supervisiontree.html#system">system supervision tree</a> + oneshot service to prepare the + <a href="//0x53.net/software/goetia/rundir.html#user">user runtime directory</a> + of a user. + For each user who should have a user runtime directory, + there should be a distinct oneshot running user-tmpfs. + </p> + <p> + Alternatively, user-tmpfs could be run by a login manager + after login, but befor initiating the first + <a href="//0x53.net/software/goetia/supervisiontree.html#user">user supervision tree</a>. + </p> + </body> +</html> |