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Diffstat (limited to 'man/sd_session_is_active.xml')
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1 files changed, 296 insertions, 315 deletions
diff --git a/man/sd_session_is_active.xml b/man/sd_session_is_active.xml index e9840669c2..4ca3a6c150 100644 --- a/man/sd_session_is_active.xml +++ b/man/sd_session_is_active.xml @@ -1,6 +1,6 @@ <?xml version='1.0'?> <!--*-nxml-*--> <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN" - "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> + "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> <!-- This file is part of systemd. @@ -23,319 +23,300 @@ <refentry id="sd_session_is_active" conditional='HAVE_PAM'> - <refentryinfo> - <title>sd_session_is_active</title> - <productname>systemd</productname> - - <authorgroup> - <author> - <contrib>Developer</contrib> - <firstname>Lennart</firstname> - <surname>Poettering</surname> - <email>lennart@poettering.net</email> - </author> - </authorgroup> - </refentryinfo> - - <refmeta> - <refentrytitle>sd_session_is_active</refentrytitle> - <manvolnum>3</manvolnum> - </refmeta> - - <refnamediv> - <refname>sd_session_is_active</refname> - <refname>sd_session_is_remote</refname> - <refname>sd_session_get_state</refname> - <refname>sd_session_get_uid</refname> - <refname>sd_session_get_seat</refname> - <refname>sd_session_get_service</refname> - <refname>sd_session_get_type</refname> - <refname>sd_session_get_class</refname> - <refname>sd_session_get_desktop</refname> - <refname>sd_session_get_display</refname> - <refname>sd_session_get_tty</refname> - <refname>sd_session_get_vt</refname> - <refname>sd_session_get_remote_host</refname> - <refname>sd_session_get_remote_user</refname> - <refpurpose>Determine state of a specific session</refpurpose> - </refnamediv> - - <refsynopsisdiv> - <funcsynopsis> - <funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo> - - <funcprototype> - <funcdef>int <function>sd_session_is_active</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_is_remote</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_state</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>state</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_uid</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>uid_t *<parameter>uid</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_seat</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>seat</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_service</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>service</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_type</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>type</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_class</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>class</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_desktop</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>desktop</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_display</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>display</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_remote_host</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>remote_host</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_remote_user</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>remote_user</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_tty</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>char **<parameter>tty</parameter></paramdef> - </funcprototype> - - <funcprototype> - <funcdef>int <function>sd_session_get_vt</function></funcdef> - <paramdef>const char *<parameter>session</parameter></paramdef> - <paramdef>unsigned int *<parameter>vt</parameter></paramdef> - </funcprototype> - </funcsynopsis> - </refsynopsisdiv> - - <refsect1> - <title>Description</title> - - <para><function>sd_session_is_active()</function> may - be used to determine whether the session identified by - the specified session identifier is currently active - (i.e. currently in the foreground and available for - user input) or not.</para> - - <para><function>sd_session_is_remote()</function> may - be used to determine whether the session identified by - the specified session identifier is a remote session - (i.e. its remote host is known) or not.</para> - - <para><function>sd_session_get_state()</function> may - be used to determine the state of the session - identified by the specified session identifier. The - following states are currently known: - <literal>online</literal> (session logged in, but - session not active, i.e. not in the foreground), - <literal>active</literal> (session logged in and - active, i.e. in the foreground), - <literal>closing</literal> (session nominally logged - out, but some processes belonging to it are still - around). In the future additional states might be - defined, client code should be written to be robust in - regards to additional state strings being - returned. This function is a more generic version of - <function>sd_session_is_active()</function>. 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> - - <para><function>sd_session_get_uid()</function> may be - used to determine the user identifier of the Unix user the session - identified by the specified session identifier belongs - to.</para> - - <para><function>sd_session_get_seat()</function> may - be used to determine the seat identifier of the seat - the session identified by the specified session - identifier belongs to. Note that not all sessions are - attached to a seat, this call will fail for them. 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> - - <para><function>sd_session_get_service()</function> - may be used to determine the name of the service (as - passed during PAM session setup) that registered the - session identified by the specified session - identifier. 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> - - <para><function>sd_session_get_type()</function> may - be used to determine the type of the session - identified by the specified session identifier. The - returned string is one of <literal>x11</literal>, - <literal>wayland</literal>, <literal>tty</literal>, - <literal>mir</literal> or <literal>unspecified</literal> and - needs to be freed with the libc - <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> - call after use.</para> - - <para><function>sd_session_get_class()</function> may - be used to determine the class of the session - identified by the specified session identifier. The - returned string is one of <literal>user</literal>, - <literal>greeter</literal>, - <literal>lock-screen</literal>, or - <literal>background</literal> and needs to be freed - with the libc - <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> - call after use.</para> - - <para><function>sd_session_get_desktop()</function> may - be used to determine the brand of the desktop running on - the session identified by the specified session identifier. - This field can be set freely by desktop environments and - does not follow any special formatting. However, desktops - are strongly recommended to use the same identifiers and - capitalization as for - <varname>$XDG_CURRENT_DESKTOP</varname>, as defined by - the <ulink - url="http://standards.freedesktop.org/desktop-entry-spec/latest/">Desktop - Entry - Specification</ulink>. 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> - - <para><function>sd_session_get_display()</function> - may be used to determine the X11 display of the - session identified by the specified session - identifier. 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> - - <para><function>sd_session_get_remote_host()</function> - may be used to determine the remote hostname of the - session identified by the specified session - identifier. 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> - - <para><function>sd_session_get_remote_user()</function> - may be used to determine the remote username of the - session identified by the specified session - identifier. The returned string needs to be - freed with the libc - <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> - call after use. Note that this value is rarely known - to the system, and even then should not be relied on.</para> - - <para><function>sd_session_get_tty()</function> - may be used to determine the TTY device of the - session identified by the specified session - identifier. 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> - - <para><function>sd_session_get_vt()</function> - may be used to determine the VT number of the - session identified by the specified session - identifier. This function will return an error if - the seat does not support VTs.</para> - - <para>If the <varname>session</varname> parameter of - any of these functions is passed as - <constant>NULL</constant>, the operation is executed - for the session the calling process is a member of, if - there is any.</para> - </refsect1> - - <refsect1> - <title>Return Value</title> - - <para>If the test succeeds, - <function>sd_session_is_active()</function> and - <function>sd_session_is_remote()</function> return a - positive integer; if it fails, 0. On success, - <function>sd_session_get_state()</function>, - <function>sd_session_get_uid()</function>, - <function>sd_session_get_seat()</function>, - <function>sd_session_get_service()</function>, - <function>sd_session_get_type()</function>, - <function>sd_session_get_class()</function>, - <function>sd_session_get_display()</function>, - <function>sd_session_get_remote_user()</function>, - <function>sd_session_get_remote_host()</function> and - <function>sd_session_get_tty()</function> return 0 or - a positive integer. On failure, these calls return a - negative errno-style error code.</para> - </refsect1> - - <refsect1> - <title>Notes</title> - - <para>The <function>sd_session_is_active()</function>, - <function>sd_session_get_state()</function>, - <function>sd_session_get_uid()</function>, - <function>sd_session_get_seat()</function>, - <function>sd_session_get_service()</function>, - <function>sd_session_get_type()</function>, - <function>sd_session_get_class()</function>, - <function>sd_session_get_display()</function>, - <function>sd_session_get_remote_host()</function>, - <function>sd_session_get_remote_user()</function> and - <function>sd_session_get_tty()</function> - interfaces are available as a shared library, which can - be compiled and linked to with the - <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> - file.</para> - </refsect1> - - <refsect1> - <title>See Also</title> - - <para> - <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, - <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>, - <citerefentry><refentrytitle>sd_pid_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry> - </para> - </refsect1> + <refentryinfo> + <title>sd_session_is_active</title> + <productname>systemd</productname> + + <authorgroup> + <author> + <contrib>Developer</contrib> + <firstname>Lennart</firstname> + <surname>Poettering</surname> + <email>lennart@poettering.net</email> + </author> + </authorgroup> + </refentryinfo> + + <refmeta> + <refentrytitle>sd_session_is_active</refentrytitle> + <manvolnum>3</manvolnum> + </refmeta> + + <refnamediv> + <refname>sd_session_is_active</refname> + <refname>sd_session_is_remote</refname> + <refname>sd_session_get_state</refname> + <refname>sd_session_get_uid</refname> + <refname>sd_session_get_seat</refname> + <refname>sd_session_get_service</refname> + <refname>sd_session_get_type</refname> + <refname>sd_session_get_class</refname> + <refname>sd_session_get_desktop</refname> + <refname>sd_session_get_display</refname> + <refname>sd_session_get_tty</refname> + <refname>sd_session_get_vt</refname> + <refname>sd_session_get_remote_host</refname> + <refname>sd_session_get_remote_user</refname> + <refpurpose>Determine state of a specific session</refpurpose> + </refnamediv> + + <refsynopsisdiv> + <funcsynopsis> + <funcsynopsisinfo>#include <systemd/sd-login.h></funcsynopsisinfo> + + <funcprototype> + <funcdef>int <function>sd_session_is_active</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_is_remote</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_state</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>state</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_uid</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>uid_t *<parameter>uid</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_seat</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>seat</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_service</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>service</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_type</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>type</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_class</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>class</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_desktop</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>desktop</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_display</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>display</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_remote_host</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>remote_host</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_remote_user</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>remote_user</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_tty</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>char **<parameter>tty</parameter></paramdef> + </funcprototype> + + <funcprototype> + <funcdef>int <function>sd_session_get_vt</function></funcdef> + <paramdef>const char *<parameter>session</parameter></paramdef> + <paramdef>unsigned int *<parameter>vt</parameter></paramdef> + </funcprototype> + </funcsynopsis> + </refsynopsisdiv> + + <refsect1> + <title>Description</title> + + <para><function>sd_session_is_active()</function> may be used to + determine whether the session identified by the specified session + identifier is currently active (i.e. currently in the foreground + and available for user input) or not.</para> + + <para><function>sd_session_is_remote()</function> may be used to + determine whether the session identified by the specified session + identifier is a remote session (i.e. its remote host is known) or + not.</para> + + <para><function>sd_session_get_state()</function> may be used to + determine the state of the session identified by the specified + session identifier. The following states are currently known: + <literal>online</literal> (session logged in, but session not + active, i.e. not in the foreground), <literal>active</literal> + (session logged in and active, i.e. in the foreground), + <literal>closing</literal> (session nominally logged out, but some + processes belonging to it are still around). In the future + additional states might be defined, client code should be written + to be robust in regards to additional state strings being + returned. This function is a more generic version of + <function>sd_session_is_active()</function>. 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> + + <para><function>sd_session_get_uid()</function> may be used to + determine the user identifier of the Unix user the session + identified by the specified session identifier belongs to.</para> + + <para><function>sd_session_get_seat()</function> may be used to + determine the seat identifier of the seat the session identified + by the specified session identifier belongs to. Note that not all + sessions are attached to a seat, this call will fail for them. 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> + + <para><function>sd_session_get_service()</function> may be used to + determine the name of the service (as passed during PAM session + setup) that registered the session identified by the specified + session identifier. 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> + + <para><function>sd_session_get_type()</function> may be used to + determine the type of the session identified by the specified + session identifier. The returned string is one of + <literal>x11</literal>, <literal>wayland</literal>, + <literal>tty</literal>, <literal>mir</literal> or + <literal>unspecified</literal> and needs to be freed with the libc + <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> + call after use.</para> + + <para><function>sd_session_get_class()</function> may be used to + determine the class of the session identified by the specified + session identifier. The returned string is one of + <literal>user</literal>, <literal>greeter</literal>, + <literal>lock-screen</literal>, or <literal>background</literal> + and needs to be freed with the libc + <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> + call after use.</para> + + <para><function>sd_session_get_desktop()</function> may be used to + determine the brand of the desktop running on the session + identified by the specified session identifier. This field can be + set freely by desktop environments and does not follow any special + formatting. However, desktops are strongly recommended to use the + same identifiers and capitalization as for + <varname>$XDG_CURRENT_DESKTOP</varname>, as defined by the <ulink + url="http://standards.freedesktop.org/desktop-entry-spec/latest/">Desktop + Entry Specification</ulink>. 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> + + <para><function>sd_session_get_display()</function> may be used to + determine the X11 display of the session identified by the + specified session identifier. 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> + + <para><function>sd_session_get_remote_host()</function> may be + used to determine the remote hostname of the session identified by + the specified session identifier. 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> + + <para><function>sd_session_get_remote_user()</function> may be + used to determine the remote username of the session identified by + the specified session identifier. The returned string needs to be + freed with the libc + <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry> + call after use. Note that this value is rarely known to the + system, and even then should not be relied on.</para> + + <para><function>sd_session_get_tty()</function> may be used to + determine the TTY device of the session identified by the + specified session identifier. 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> + + <para><function>sd_session_get_vt()</function> may be used to + determine the VT number of the session identified by the specified + session identifier. This function will return an error if the seat + does not support VTs.</para> + + <para>If the <varname>session</varname> parameter of any of these + functions is passed as <constant>NULL</constant>, the operation is + executed for the session the calling process is a member of, if + there is any.</para> + </refsect1> + + <refsect1> + <title>Return Value</title> + + <para>If the test succeeds, + <function>sd_session_is_active()</function> and + <function>sd_session_is_remote()</function> return a + positive integer; if it fails, 0. On success, + <function>sd_session_get_state()</function>, + <function>sd_session_get_uid()</function>, + <function>sd_session_get_seat()</function>, + <function>sd_session_get_service()</function>, + <function>sd_session_get_type()</function>, + <function>sd_session_get_class()</function>, + <function>sd_session_get_display()</function>, + <function>sd_session_get_remote_user()</function>, + <function>sd_session_get_remote_host()</function> and + <function>sd_session_get_tty()</function> return 0 or + a positive integer. On failure, these calls return a + negative errno-style error code.</para> + </refsect1> + + <refsect1> + <title>Notes</title> + + <para>The <function>sd_session_is_active()</function>, + <function>sd_session_get_state()</function>, + <function>sd_session_get_uid()</function>, + <function>sd_session_get_seat()</function>, + <function>sd_session_get_service()</function>, + <function>sd_session_get_type()</function>, + <function>sd_session_get_class()</function>, + <function>sd_session_get_display()</function>, + <function>sd_session_get_remote_host()</function>, + <function>sd_session_get_remote_user()</function> and + <function>sd_session_get_tty()</function> + interfaces are available as a shared library, which can + be compiled and linked to with the + <constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry> + file.</para> + </refsect1> + + <refsect1> + <title>See Also</title> + + <para> + <citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd-login</refentrytitle><manvolnum>3</manvolnum></citerefentry>, + <citerefentry><refentrytitle>sd_pid_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry> + </para> + </refsect1> </refentry> |