12b42c7667
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.
273 lines
12 KiB
XML
273 lines
12 KiB
XML
<?xml version='1.0'?> <!--*- Mode: nxml; nxml-child-indent: 2; indent-tabs-mode: nil -*-->
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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_new_from_pid">
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<refentryinfo>
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<title>sd_bus_creds_new_from_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_new_from_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_new_from_pid</refname>
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<refname>sd_bus_creds_get_mask</refname>
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<refname>sd_bus_creds_ref</refname>
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<refname>sd_bus_creds_unref</refname>
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<refpurpose>Retrieve credentials object for the specified PID</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_new_from_pid</function></funcdef>
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<paramdef>pid_t <parameter>pid</parameter></paramdef>
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<paramdef>uint64_t <parameter>creds_mask</parameter></paramdef>
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<paramdef>sd_bus_creds **<parameter>ret</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>uint64_t <function>sd_bus_creds_get_mask</function></funcdef>
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<paramdef>const sd_bus_creds *<parameter>c</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>sd_bus_creds *<function>sd_bus_creds_ref</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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</funcprototype>
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<funcprototype>
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<funcdef>sd_bus_creds *<function>sd_bus_creds_unref</function></funcdef>
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<paramdef>sd_bus_creds *<parameter>c</parameter></paramdef>
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</funcprototype>
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</funcsynopsis>
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<para>
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<constant>SD_BUS_CREDS_PID</constant>,
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<constant>SD_BUS_CREDS_TID</constant>,
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<constant>SD_BUS_CREDS_UID</constant>,
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<constant>SD_BUS_CREDS_GID</constant>,
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<constant>SD_BUS_CREDS_COMM</constant>,
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<constant>SD_BUS_CREDS_TID_COMM</constant>,
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<constant>SD_BUS_CREDS_EXE</constant>,
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<constant>SD_BUS_CREDS_CMDLINE</constant>,
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<constant>SD_BUS_CREDS_CGROUP</constant>,
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<constant>SD_BUS_CREDS_UNIT</constant>,
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<constant>SD_BUS_CREDS_USER_UNIT</constant>,
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<constant>SD_BUS_CREDS_SLICE</constant>,
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<constant>SD_BUS_CREDS_SESSION</constant>,
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<constant>SD_BUS_CREDS_OWNER_UID</constant>,
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<constant>SD_BUS_CREDS_EFFECTIVE_CAPS</constant>,
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<constant>SD_BUS_CREDS_PERMITTED_CAPS</constant>,
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<constant>SD_BUS_CREDS_INHERITABLE_CAPS</constant>,
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<constant>SD_BUS_CREDS_BOUNDING_CAPS</constant>,
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<constant>SD_BUS_CREDS_SELINUX_CONTEXT</constant>,
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<constant>SD_BUS_CREDS_AUDIT_SESSION_ID</constant>,
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<constant>SD_BUS_CREDS_AUDIT_LOGIN_UID</constant>,
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<constant>SD_BUS_CREDS_UNIQUE_NAME</constant>,
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<constant>SD_BUS_CREDS_WELL_KNOWN_NAMES</constant>,
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<constant>_SD_BUS_CREDS_ALL</constant>
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</para>
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</refsynopsisdiv>
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<refsect1>
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<title>Description</title>
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<para><function>sd_bus_creds_new_from_pid()</function> creates a new
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credentials object and fills it with information about the process
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<parameter>pid</parameter>. This pointer to this object will
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be stored in <parameter>ret</parameter> pointer.</para>
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<para>The information that will be stored is determined by
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<parameter>creds_mask</parameter>. It may contain a subset of ORed
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constants <constant>SD_BUS_CREDS_PID</constant>,
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<constant>SD_BUS_CREDS_TID</constant>,
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<constant>SD_BUS_CREDS_UID</constant>,
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<constant>SD_BUS_CREDS_GID</constant>,
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<constant>SD_BUS_CREDS_COMM</constant>,
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<constant>SD_BUS_CREDS_TID_COMM</constant>,
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<constant>SD_BUS_CREDS_EXE</constant>,
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<constant>SD_BUS_CREDS_CMDLINE</constant>,
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<constant>SD_BUS_CREDS_CGROUP</constant>,
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<constant>SD_BUS_CREDS_UNIT</constant>,
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<constant>SD_BUS_CREDS_USER_UNIT</constant>,
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<constant>SD_BUS_CREDS_SLICE</constant>,
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<constant>SD_BUS_CREDS_SESSION</constant>,
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<constant>SD_BUS_CREDS_OWNER_UID</constant>,
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<constant>SD_BUS_CREDS_EFFECTIVE_CAPS</constant>,
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<constant>SD_BUS_CREDS_PERMITTED_CAPS</constant>,
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<constant>SD_BUS_CREDS_INHERITABLE_CAPS</constant>,
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<constant>SD_BUS_CREDS_BOUNDING_CAPS</constant>,
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<constant>SD_BUS_CREDS_SELINUX_CONTEXT</constant>,
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<constant>SD_BUS_CREDS_AUDIT_SESSION_ID</constant>,
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<constant>SD_BUS_CREDS_AUDIT_LOGIN_UID</constant>,
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<constant>SD_BUS_CREDS_UNIQUE_NAME</constant>,
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<constant>SD_BUS_CREDS_WELL_KNOWN_NAMES</constant>,
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or <constant>_SD_BUS_CREDS_ALL</constant> to indicate
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all known fields.</para>
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<para>Fields can be retrieved from the credentials object using
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<citerefentry><refentrytitle>sd_bus_creds_get_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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and other functions which correspond directly to the constants
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listed above.</para>
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<para>A mask of fields which were actually successfully set
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(acquired from <filename>/proc</filename>, etc.) can be retrieved
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with <function>sd_bus_creds_get_mask()</function>. If the
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credentials object was created with
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<function>sd_bus_creds_new_from_pid()</function>, this will be a
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subset of fields requested in <parameter>creds_mask</parameter>.
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</para>
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<para><function>sd_bus_creds_ref</function> creates a new
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reference to the credentials object <parameter>c</parameter>. This
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object will not be destroyed until
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<function>sd_bus_creds_unref</function> has been called as many
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times plus once more. Once the reference count has dropped to zero,
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<parameter>c</parameter> cannot be used anymore, so further
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calls to <function>sd_bus_creds_ref(c)</function> or
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<function>sd_bus_creds_unref(c)</function> are illegal.</para>
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<para><function>sd_bus_creds_unref</function> destroys a reference
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to <parameter>c</parameter>.</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, <function>sd_bus_creds_new_from_pid()</function>
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returns 0 or a positive integer. On failure, it returns a negative
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errno-style error code.</para>
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<para><function>sd_bus_creds_get_mask()</function> returns the
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mask of successfully acquired fields.</para>
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<para><function>sd_bus_creds_ref</function> always returns the
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argument.</para>
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<para><function>sd_bus_creds_unref</function> always returns
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<constant>NULL</constant>.</para>
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</refsect1>
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<refsect1>
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<title>Reference ownership</title>
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<para>Function <function>sd_bus_creds_new_from_pid()</function>
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creates a new object and the caller owns the sole reference. When
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not needed anymore, this reference should be destroyed with
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<citerefentry><refentrytitle>sd_bus_creds_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>.
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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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<para>Returned errors may indicate the following problems:</para>
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<variablelist>
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<varlistentry>
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<term><constant>-ESRCH</constant></term>
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<listitem><para>Specified <parameter>pid</parameter> could not
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be found.</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>-EINVAL</constant></term>
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<listitem><para>Specified parameter is invalid
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(<constant>NULL</constant> in case of output
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parameters).</para></listitem>
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</varlistentry>
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<varlistentry>
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<term><constant>-ENOMEM</constant></term>
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<listitem><para>Memory allocation failed.</para></listitem>
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</varlistentry>
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</variablelist>
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</refsect1>
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<refsect1>
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<title>Notes</title>
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<para><function>sd_bus_creds_new_from_pid()</function> is
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available as a shared library, which can be compiled and linked to
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with the
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<constant>libsystemd</constant> <citerefentry project='die-net'><refentrytitle>pkg-config</refentrytitle><manvolnum>1</manvolnum></citerefentry>
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file.</para>
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</refsect1>
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<refsect1>
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<title>See Also</title>
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<para>
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<citerefentry><refentrytitle>systemd</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd-bus</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_ref</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_unref</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_tid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_gid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_comm</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_tid_comm</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_exe</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_cmdline</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_cgroup</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_unit</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_user_unit</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_slice</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_session</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_owner_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_has_effective_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_has_permitted_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_has_inheritable_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_has_bounding_cap</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_selinux_context</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_audit_session_id</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_audit_login_uid</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_unique_name</refentrytitle><manvolnum>3</manvolnum></citerefentry>,
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<citerefentry><refentrytitle>sd_bus_creds_get_well_known_names</refentrytitle><manvolnum>3</manvolnum></citerefentry>
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</para>
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</refsect1>
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</refentry>
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