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The list of man pages is auto generated, based on conditonal='...' attributes in the man page itself.
454 lines
19 KiB
XML
454 lines
19 KiB
XML
<?xml version='1.0'?> <!--*-nxml-*-->
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<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
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"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
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<!--
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This file is part of systemd.
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Copyright 2014 Zbigniew Jędrzejewski-Szmek
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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-->
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<refentry id="sd_bus_creds_get_pid" conditional="ENABLE_KDBUS">
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<refentryinfo>
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<title>sd_bus_creds_get_pid</title>
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<productname>systemd</productname>
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<authorgroup>
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<author>
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<contrib>A monkey with a typewriter</contrib>
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<firstname>Zbigniew</firstname>
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<surname>Jędrzejewski-Szmek</surname>
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<email>zbyszek@in.waw.pl</email>
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</author>
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</authorgroup>
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</refentryinfo>
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<refmeta>
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<refentrytitle>sd_bus_creds_get_pid</refentrytitle>
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<manvolnum>3</manvolnum>
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</refmeta>
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<refnamediv>
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<refname>sd_bus_creds_get_pid</refname>
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<refname>sd_bus_creds_get_pid_starttime</refname>
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<refname>sd_bus_creds_get_tid</refname>
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<refname>sd_bus_creds_get_uid</refname>
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<refname>sd_bus_creds_get_gid</refname>
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<refname>sd_bus_creds_get_comm</refname>
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<refname>sd_bus_creds_get_tid_comm</refname>
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<refname>sd_bus_creds_get_exe</refname>
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<refname>sd_bus_creds_get_cmdline</refname>
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<refname>sd_bus_creds_get_cgroup</refname>
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<refname>sd_bus_creds_get_unit</refname>
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<refname>sd_bus_creds_get_user_unit</refname>
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<refname>sd_bus_creds_get_slice</refname>
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<refname>sd_bus_creds_get_session</refname>
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<refname>sd_bus_creds_get_owner_uid</refname>
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<refname>sd_bus_creds_has_effective_cap</refname>
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<refname>sd_bus_creds_has_permitted_cap</refname>
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<refname>sd_bus_creds_has_inheritable_cap</refname>
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<refname>sd_bus_creds_has_bounding_cap</refname>
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<refname>sd_bus_creds_get_selinux_context</refname>
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<refname>sd_bus_creds_get_audit_session_id</refname>
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<refname>sd_bus_creds_get_audit_login_uid</refname>
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<refname>sd_bus_creds_get_unique_name</refname>
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<refname>sd_bus_creds_get_well_known_names</refname>
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<refpurpose>Retrieve fields from a credentials object</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<funcsynopsis>
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<funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_pid</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>pid_t *<parameter>pid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_pid_starttime</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>uint64_t *<parameter>usec</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_tid</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>pid_t *<parameter>tid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_pid</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>uid_t *<parameter>uid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_gid</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>gid_t *<parameter>gid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_comm</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>comm</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_tid_comm</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>comm</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_exe</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>exe</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_cmdline</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>char ***<parameter>cmdline</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_cgroup</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>cgroup</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_unit</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>unit</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_user_unit</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>unit</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_slice</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>slice</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_session</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>slice</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_owner_uid</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>uid_t *<parameter>uid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_has_effective_cap</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>int <parameter>capability</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_has_permitted_cap</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>int <parameter>capability</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_has_inheritable_cap</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>int <parameter>capability</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_has_bounding_cap</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>int <parameter>capability</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_selinux_context</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>context</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_audit_session_id</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>uint32_t *<parameter>sessionid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_audit_login_uid</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>uid_t *<parameter>loginuid</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_unique_name</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>const char **<parameter>name</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>int <function>sd_bus_creds_get_well_known_names</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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<paramdef>char ***<parameter>name</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para>These functions return information from an
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<parameter>sd_bus_creds</parameter> object. It may be created with
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<citerefentry><refentrytitle>sd_bus_creds_new_from_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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in which case it will describe the specified process, or it may be
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created by
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<citerefentry><refentrytitle>sd_bus_get_peer_creds</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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in which case it will describe the process at the other endpoint
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of a connection.
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</para>
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<para><function>sd_bus_creds_get_pid</function> will retrieve the
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PID (process identifier).</para>
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<para><function>sd_bus_creds_get_pid_starttime</function> will
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retrieve the time since the start of the epoch in microseconds
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since the process was started.</para>
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<para><function>sd_bus_creds_get_tid</function> will retrieve the
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TID (thread identifier).</para>
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<para><function>sd_bus_creds_get_uid</function> will retrieve the
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numeric UID (user identifier).</para>
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<para><function>sd_bus_creds_get_gid</function> will retrieve the
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numeric GID (group identifier).</para>
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<para><function>sd_bus_creds_get_comm</function> will retrieve the
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comm field (truncated name of the executable, as stored in
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<filename>/proc/<replaceable>pid</replaceable>/comm</filename>).
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</para>
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<para><function>sd_bus_creds_get_tid_comm</function> will retrieve
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the comm field of the thread (as stored in
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<filename>/proc/<replaceable>pid</replaceable>/task/<replaceable>tid</replaceable>/comm</filename>).
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</para>
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<para><function>sd_bus_creds_get_exe</function> will retrieve the
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path to the program (as stored in the
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<filename>/proc/<replaceable>pid</replaceable>/exe</filename>
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link, but with <literal> (deleted)</literal> suffix removed).
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</para>
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<para><function>sd_bus_creds_get_cmdline</function> will retrieve
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an array of command-line arguments (as stored in
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<filename>/proc/<replaceable>pid</replaceable>/cmdline</filename>).
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</para>
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<para><function>sd_bus_creds_get_cgroup</function> will retrieve
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the cgroup path. See <ulink
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url="https://www.kernel.org/doc/Documentation/cgroups/cgroups.txt">cgroups.txt</ulink>.
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</para>
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<para><function>sd_bus_creds_get_unit</function> will retrieve the
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systemd unit name (in the system instance of systemd) that the
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process is part of. See
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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<para><function>sd_bus_creds_get_user_unit</function> will
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retrieve the systemd unit name (in the user instance of systemd)
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that the process is part of. See
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<citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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<para><function>sd_bus_creds_get_slice</function> will retrieve
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the systemd slice (a unit in the system instance of systemd) that
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the process is part of. See
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<citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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<para><function>sd_bus_creds_get_session</function> will retrieve
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the logind session that the process is part of. See
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<citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>.
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</para>
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<para><function>sd_bus_creds_get_owner_uid</function> will retrieve
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the numeric UID (user identifier) of the user who owns the slice
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that the process is part of. See
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<citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>
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<!-- and
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<citerefentry><refentrytitle>systemd-user-sessions.service</refentrytitle><manvolnum>8</manvolnum></citerefentry> -->.
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</para>
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<para><function>sd_bus_creds_has_effective_cap</function> will
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check whether the capability specified by
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<parameter>capability</parameter> was set in the effective
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capabilities mask. A positive return value means that is was
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set, zero means that it was not set, and a negative return
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value signifies an error. See
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<citerefentry><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry>
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and <varname>Capabilities=</varname> and
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<varname>CapabilityBoundingSet=</varname> settings in
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<citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>.
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</para>
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<para><function>sd_bus_creds_has_permitted_cap</function> is
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similar to <function>sd_bus_creds_has_effective_cap</function>,
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but will check the permitted capabilities mask.</para>
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<para><function>sd_bus_creds_has_inheritable_cap</function> is
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similar to <function>sd_bus_creds_has_effective_cap</function>,
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but will check the inheritable capabilities mask.</para>
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<para><function>sd_bus_creds_has_bounding_cap</function> is
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similar to <function>sd_bus_creds_has_effective_cap</function>,
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but will check the bounding capabilities mask.</para>
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<para><function>sd_bus_creds_get_selinux_context</function> will
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retrieve the SELinux security context (label) of the process.</para>
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<para><function>sd_bus_creds_get_audit_session_id</function> will
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retrieve the audit session identifier of the process.</para>
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<para><function>sd_bus_creds_get_audit_login_uid</function> will
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retrieve the audit user login identifier (the identifier of the
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user who is "responsible" for the session).</para>
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<para><function>sd_bus_creds_get_unique_name</function> will
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retrieve the D-Bus unique name. See <ulink
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url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus">The
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D-Bus specification</ulink>.</para>
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<para><function>sd_bus_creds_get_well_known_names</function> will
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retrieve the set of D-Bus well-known names. See <ulink
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url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus">The
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D-Bus specification</ulink>.</para>
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<para>All functions that take a <parameter>const
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char**</parameter> parameter will store the answer there as an
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address of a NUL-terminated string. It will be valid as long as
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<parameter>c</parameter> remains valid, and should not be freed or
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modified by the caller.</para>
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<para>All functions that take a <parameter>char***</parameter>
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parameter will store the answer there as an address of a an array
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of strings. Each invidividual string is NUL-terminated, and the
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array is NULL-terminated as a whole. It will be valid as long as
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<parameter>c</parameter> remains valid, and should not be freed or
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modified by the caller.</para>
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</refsect1>
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<refsect1>
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<title>Return Value</title>
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<para>On success, these calls return 0 or a positive integer. On
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failure, these calls return a negative errno-style error code.
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</para>
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</refsect1>
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<refsect1>
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<title>Errors</title>
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||
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||
<para>Returned errors may indicate the following problems:</para>
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||
<variablelist>
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||
<varlistentry>
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||
<term><varname>-ENODATA</varname></term>
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||
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||
<listitem><para>Given field is not available in
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||
<parameter>c</parameter>.</para>
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||
</listitem>
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||
</varlistentry>
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||
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||
<varlistentry>
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||
<term><varname>-ENOENT</varname></term>
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||
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||
<listitem><para>Given field is not specified for the sender.
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||
This will be returned by <function>sd_bus_get_unit</function>,
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||
<function>sd_bus_get_user_unit</function>,
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||
<function>sd_bus_get_slice</function>,
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||
<function>sd_bus_get_session</function>, and
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||
<function>sd_bus_get_owner_uid</function> if the sender is not
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||
part of a systemd system unit, systemd user unit, systemd
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||
slice, logind session, or a systemd user session.</para>
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</listitem>
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||
</varlistentry>
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||
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<varlistentry>
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<term><varname>-ENXIO</varname></term>
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||
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<listitem><para>An error occured in parsing cgroup paths.
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||
<filename>libsystemd</filename> might be out of sync with
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the running systemd version.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><varname>-EINVAL</varname></term>
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<listitem><para>Specified pointer parameter is <constant>NULL</constant>.
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</para></listitem>
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</varlistentry>
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<varlistentry>
|
||
<term><varname>-ENOMEM</varname></term>
|
||
|
||
<listitem><para>Memory allocation failed.</para></listitem>
|
||
</varlistentry>
|
||
</variablelist>
|
||
</refsect1>
|
||
|
||
<refsect1>
|
||
<title>Notes</title>
|
||
|
||
<para><function>sd_bus_open_user()</function> and other functions
|
||
described here are available as a shared library, which can be
|
||
compiled and linked to with the
|
||
<constant>libsystemd</constant> <citerefentry><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-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>credentials</refentrytitle><manvolnum>7</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>fork</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>execve</refentrytitle><manvolnum>2</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>proc</refentrytitle><manvolnum>5</manvolnum></citerefentry>,
|
||
<citerefentry><refentrytitle>systemd.journald-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry>
|
||
</para>
|
||
</refsect1>
|
||
|
||
</refentry>
|