mirrors/systemd
0
0
Fork 0
mirror of https://github.com/systemd/systemd.git synced 2024-11-23 10:13:34 +08:00
Code Issues Packages Projects Releases Wiki Activity
245841a872
systemd/man/sd_seat_get_active.xml

162 lines
6.4 KiB
XML
Raw Normal View History

man: document the sd-login interfaces
2011-12-19 10:02:17 +08:00
<?xml version='1.0'?> <!--*-nxml-*-->
man: use same header for all files The "include" files had type "book" for some raeason. I don't think this is meaningful. Let's just use the same everywhere. $ perl -i -0pe 's^..DOCTYPE (book|refentry) PUBLIC "-//OASIS//DTD DocBook XML V4.[25]//EN"\s+"http^<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"\n "http^gms' man/*.xml
2019-03-14 21:40:58 +08:00
<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
man: revert dynamic paths for split-usr setups This did not really work out as we had hoped. Trying to do this upstream introduced several problems that probably makes it better suited as a downstream patch after all. At any rate, it is not releaseable in the current state, so we at least need to revert this before the release. * by adjusting the path to binaries, but not do the same thing to the search path we end up with inconsistent man-pages. Adjusting the search path too would be quite messy, and it is not at all obvious that this is worth the effort, but at any rate it would have to be done before we could ship this. * this means that distributed man-pages does not make sense as they depend on config options, and for better or worse we are still distributing man pages, so that is something that definitely needs sorting out before we could ship with this patch. * we have long held that split-usr is only minimally supported in order to boot, and something we hope will eventually go away. So before we start adding even more magic/effort in order to make this work nicely, we should probably question if it makes sense at all.
2015-06-19 01:47:44 +08:00
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
license: LGPL-2.1+ -> LGPL-2.1-or-later
2020-11-09 12:23:58 +08:00
<!-- SPDX-License-Identifier: LGPL-2.1-or-later -->
man: document the sd-login interfaces
2011-12-19 10:02:17 +08:00
man: xinclude the generic text to talk about libsystemd pkgconfig The only difference is that functions are not individually listed by name, but that seems completely pointless, since all functions that are documented are always exported, so the generic text tells the user all she or he needs to know.
2018-06-06 17:59:04 +08:00
<refentry id="sd_seat_get_active" conditional='HAVE_PAM'
xmlns:xi="http://www.w3.org/2001/XInclude">
man: document the sd-login interfaces
2011-12-19 10:02:17 +08:00
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
<refentryinfo>
<title>sd_seat_get_active</title>
<productname>systemd</productname>
</refentryinfo>
<refmeta>
<refentrytitle>sd_seat_get_active</refentrytitle>
<manvolnum>3</manvolnum>
</refmeta>
<refnamediv>
<refname>sd_seat_get_active</refname>
<refname>sd_seat_get_sessions</refname>
<refname>sd_seat_can_tty</refname>
<refname>sd_seat_can_graphical</refname>
<refpurpose>Determine state of a specific seat</refpurpose>
</refnamediv>
<refsynopsisdiv>
<funcsynopsis>
<funcsynopsisinfo>#include &lt;systemd/sd-login.h&gt;</funcsynopsisinfo>
<funcprototype>
<funcdef>int <function>sd_seat_get_active</function></funcdef>
<paramdef>const char *<parameter>seat</parameter></paramdef>
<paramdef>char **<parameter>session</parameter></paramdef>
<paramdef>uid_t *<parameter>uid</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_seat_get_sessions</function></funcdef>
<paramdef>const char *<parameter>seat</parameter></paramdef>
Fix output value of sd_seat_get_sessions() and drop FOREACH_WORD use sd_seat_get_sessions() would return 0 in the 'n_uids' (now 'ret_n_uids') output parameter when 'uid' (now 'ret_uids') was passed as NULL. While at it, drop FOREACH_WORD() use. Also use any whitespace as separator. In practice this shouldn't matter, since logind always uses spaces, but it seems nicer to not specify this explicitly, and the default is more flexible.
2020-07-30 18:43:07 +08:00
<paramdef>char ***<parameter>ret_sessions</parameter></paramdef>
<paramdef>uid_t **<parameter>ret_uids</parameter></paramdef>
<paramdef>unsigned int *<parameter>ret_n_uids</parameter></paramdef>
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_seat_can_tty</function></funcdef>
<paramdef>const char *<parameter>seat</parameter></paramdef>
</funcprototype>
<funcprototype>
<funcdef>int <function>sd_seat_can_graphical</function></funcdef>
<paramdef>const char *<parameter>seat</parameter></paramdef>
</funcprototype>
</funcsynopsis>
</refsynopsisdiv>
<refsect1>
<title>Description</title>
<para><function>sd_seat_get_active()</function> may be used to
determine which session is currently active on a seat, if there is
any. Returns the session identifier and the user identifier of the
Unix user the session is belonging to. Either the session or the
user identifier parameter can be passed <constant>NULL</constant>,
in case only one of the parameters shall be queried. The returned
string needs to be freed with the libc
<citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>
call after use.</para>
Fix output value of sd_seat_get_sessions() and drop FOREACH_WORD use sd_seat_get_sessions() would return 0 in the 'n_uids' (now 'ret_n_uids') output parameter when 'uid' (now 'ret_uids') was passed as NULL. While at it, drop FOREACH_WORD() use. Also use any whitespace as separator. In practice this shouldn't matter, since logind always uses spaces, but it seems nicer to not specify this explicitly, and the default is more flexible.
2020-07-30 18:43:07 +08:00
<para><function>sd_seat_get_sessions()</function> may be used to determine all sessions on the specified
seat. Returns two arrays, one (<constant>NULL</constant> terminated) with the session identifiers of the
sessions and one with the user identifiers of the Unix users the sessions belong to. An additional
parameter may be used to return the number of entries in the latter array. This value is the same as the
return value if the return value is nonnegative. The output parameters may be passed as
<constant>NULL</constant> in case these output values are not needed. The arrays and the strings
referenced by them need to be freed with the libc <citerefentry
project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> call after
use. Note that instead of an empty array <constant>NULL</constant> may be returned and should be
considered equivalent to an empty array.</para>
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
<para><function>sd_seat_can_tty()</function> may be used to
determine whether a specific seat provides TTY functionality, i.e.
is useful as a text console.</para>
<para><function>sd_seat_can_graphical()</function> may be used to
determine whether a specific seat provides graphics functionality,
i.e. is useful as a graphics display.</para>
<para>If the <varname>seat</varname> parameter of any of these
functions is passed as <constant>NULL</constant>, the operation is
executed for the seat of the session of the calling process, if
there is any.</para>
</refsect1>
<refsect1>
<title>Return Value</title>
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<para> On success, <function>sd_seat_get_active()</function> returns 0 or a positive integer. On success,
<function>sd_seat_get_sessions()</function> returns the number of entries in the session identifier
sd-login: get rid of seat_can_multi_session() Follow-up for fa2cf64a917d31605d40d34e98ce9e2e066064fa. Backwards-compat is retained. A short note is added in docs, in case people see sd_seat_can_multi_session() mentioned somewhere and wonder what happened to it. Also see https://github.com/systemd/systemd/pull/15337#issuecomment-610369404.
2020-04-17 19:57:40 +08:00
array. If the test succeeds,
man: append parentheses for function name
2020-11-10 05:38:36 +08:00
<function>sd_seat_can_tty()</function> and <function>sd_seat_can_graphical()</function> return a positive
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
integer, if it fails 0. On failure, these calls return a negative errno-style error code.</para>
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<refsect2>
<title>Errors</title>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<para>Returned errors may indicate the following problems:</para>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<variablelist>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<varlistentry>
<term><constant>-ENODATA</constant></term>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<listitem><para>The given field is not specified for the described seat.</para>
</listitem>
</varlistentry>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<varlistentry>
<term><constant>-ENXIO</constant></term>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<listitem><para>The specified seat is unknown.</para>
</listitem>
</varlistentry>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<varlistentry>
<term><constant>-EINVAL</constant></term>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<listitem><para>An input parameter was invalid (out of range, or <constant>NULL</constant>, where
that is not accepted).</para></listitem>
</varlistentry>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<varlistentry>
<term><constant>-ENOMEM</constant></term>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
man: make separate "Errors" sections subsection of "Return value" Logically, this is better, because we're describing a subset of possible return values. Visually this also looks quite good because groff renders refsect2 much less prominently. Also rewrap things, add <constant> in various places, fix some typos.
2019-03-21 21:53:00 +08:00
<listitem><para>Memory allocation failed.</para></listitem>
</varlistentry>
</variablelist>
</refsect2>
sd-login: rework error handling Makre sure we always return sensible errors for the various, following the same rules, and document them in a comment in sd-login.c. Also, update all relevant man pages accordingly.
2015-09-04 15:05:52 +08:00
</refsect1>
man: xinclude the generic text to talk about libsystemd pkgconfig The only difference is that functions are not individually listed by name, but that seems completely pointless, since all functions that are documented are always exported, so the generic text tells the user all she or he needs to know.
2018-06-06 17:59:04 +08:00
<xi:include href="libsystemd-pkgconfig.xml" />
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
sd-login: get rid of seat_can_multi_session() Follow-up for fa2cf64a917d31605d40d34e98ce9e2e066064fa. Backwards-compat is retained. A short note is added in docs, in case people see sd_seat_can_multi_session() mentioned somewhere and wonder what happened to it. Also see https://github.com/systemd/systemd/pull/15337#issuecomment-610369404.
2020-04-17 19:57:40 +08:00
<refsect1>
<title>History</title>
man: condense version information for functions Use a more compact form like 'a, b, and c were added in version x'
2023-09-19 00:44:26 +08:00
<para><function>sd_seat_can_tty()</function> and
<function>sd_seat_can_graphical()</function> were added in version 186.</para>
sd-login: get rid of seat_can_multi_session() Follow-up for fa2cf64a917d31605d40d34e98ce9e2e066064fa. Backwards-compat is retained. A short note is added in docs, in case people see sd_seat_can_multi_session() mentioned somewhere and wonder what happened to it. Also see https://github.com/systemd/systemd/pull/15337#issuecomment-610369404.
2020-04-17 19:57:40 +08:00
</refsect1>
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
<refsect1>
<title>See Also</title>
man: use <simplelist> for 'See also' sections This is just a slight markup improvement; there should be no difference in rendering.
2023-12-23 02:09:32 +08:00
<para><simplelist type="inline">
<member><citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry></member>
<member><citerefentry><refentrytitle>sd_session_get_seat</refentrytitle><manvolnum>3</manvolnum></citerefentry></member>
</simplelist></para>
Reindent man pages to 2ch
2015-02-04 10:14:13 +08:00
</refsect1>
man: document the sd-login interfaces
2011-12-19 10:02:17 +08:00
</refentry>
Reference in New Issue Copy Permalink