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5aded36978
It is annoying when we have dead links on fd.o. Add project='man-pages|die-net|archlinux' to <citerefentry>-ies. In generated html, add external links to http://man7.org/linux/man-pages/man, http://linux.die.net/man/, https://www.archlinux.org/. By default, pages in sections 2 and 4 go to man7, since Michael Kerrisk is the autorative source on kernel related stuff. The rest of links goes to linux.die.net, because they have the manpages. Except for the pacman stuff, since it seems to be only available from archlinux.org. Poor gummiboot gets no link, because gummitboot(8) ain't to be found on the net. According to common wisdom, that would mean that it does not exist. But I have seen Kay using it, so I know it does, and deserves to be found. Can somebody be nice and put it up somewhere?
276 lines
12 KiB
XML
276 lines
12 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_new_from_pid" conditional="ENABLE_KDBUS">
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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_PID_STARTTIME</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_PID_STARTTIME</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 sucessfully 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 futher
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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><varname>-ESRCH</varname></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><varname>-EINVAL</varname></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><varname>-ENOMEM</varname></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_pid_starttime</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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