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| <!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" |
| "http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd"> |
| <!-- SPDX-License-Identifier: LGPL-2.1-or-later --> |
| |
| <refentry id="sd_bus_creds_get_pid" xmlns:xi="http://www.w3.org/2001/XInclude"> |
| |
| <refentryinfo> |
| <title>sd_bus_creds_get_pid</title> |
| <productname>systemd</productname> |
| </refentryinfo> |
| |
| <refmeta> |
| <refentrytitle>sd_bus_creds_get_pid</refentrytitle> |
| <manvolnum>3</manvolnum> |
| </refmeta> |
| |
| <refnamediv> |
| <refname>sd_bus_creds_get_pid</refname> |
| <refname>sd_bus_creds_get_ppid</refname> |
| <refname>sd_bus_creds_get_tid</refname> |
| <refname>sd_bus_creds_get_uid</refname> |
| <refname>sd_bus_creds_get_euid</refname> |
| <refname>sd_bus_creds_get_suid</refname> |
| <refname>sd_bus_creds_get_fsuid</refname> |
| <refname>sd_bus_creds_get_gid</refname> |
| <refname>sd_bus_creds_get_egid</refname> |
| <refname>sd_bus_creds_get_sgid</refname> |
| <refname>sd_bus_creds_get_fsgid</refname> |
| <refname>sd_bus_creds_get_supplementary_gids</refname> |
| <refname>sd_bus_creds_get_comm</refname> |
| <refname>sd_bus_creds_get_tid_comm</refname> |
| <refname>sd_bus_creds_get_exe</refname> |
| <refname>sd_bus_creds_get_cmdline</refname> |
| <refname>sd_bus_creds_get_cgroup</refname> |
| <refname>sd_bus_creds_get_unit</refname> |
| <refname>sd_bus_creds_get_slice</refname> |
| <refname>sd_bus_creds_get_user_unit</refname> |
| <refname>sd_bus_creds_get_user_slice</refname> |
| <refname>sd_bus_creds_get_session</refname> |
| <refname>sd_bus_creds_get_owner_uid</refname> |
| <refname>sd_bus_creds_has_effective_cap</refname> |
| <refname>sd_bus_creds_has_permitted_cap</refname> |
| <refname>sd_bus_creds_has_inheritable_cap</refname> |
| <refname>sd_bus_creds_has_bounding_cap</refname> |
| <refname>sd_bus_creds_get_selinux_context</refname> |
| <refname>sd_bus_creds_get_audit_session_id</refname> |
| <refname>sd_bus_creds_get_audit_login_uid</refname> |
| <refname>sd_bus_creds_get_tty</refname> |
| <refname>sd_bus_creds_get_unique_name</refname> |
| <refname>sd_bus_creds_get_well_known_names</refname> |
| <refname>sd_bus_creds_get_description</refname> |
| |
| <refpurpose>Retrieve fields from a credentials object</refpurpose> |
| </refnamediv> |
| |
| <refsynopsisdiv> |
| <funcsynopsis> |
| <funcsynopsisinfo>#include <systemd/sd-bus.h></funcsynopsisinfo> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_pid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>pid_t *<parameter>pid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_ppid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>pid_t *<parameter>ppid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_tid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>pid_t *<parameter>tid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_uid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uid_t *<parameter>uid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_euid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uid_t *<parameter>uid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_suid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uid_t *<parameter>uid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_fsuid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uid_t *<parameter>uid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_gid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>gid_t *<parameter>gid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_egid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>gid_t *<parameter>gid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_sgid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>gid_t *<parameter>gid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_fsgid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>gid_t *<parameter>gid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_supplementary_gids</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const gid_t **<parameter>gids</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_comm</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>comm</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_tid_comm</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>comm</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_exe</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>exe</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_cmdline</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>char ***<parameter>cmdline</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_cgroup</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>cgroup</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_unit</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>unit</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_slice</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>slice</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_user_unit</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>unit</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_user_slice</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>slice</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_session</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>slice</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_owner_uid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uid_t *<parameter>uid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_has_effective_cap</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>int <parameter>capability</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_has_permitted_cap</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>int <parameter>capability</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_has_inheritable_cap</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>int <parameter>capability</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_has_bounding_cap</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>int <parameter>capability</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_selinux_context</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>context</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_audit_session_id</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uint32_t *<parameter>sessionid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_audit_login_uid</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>uid_t *<parameter>loginuid</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_tty</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>tty</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_unique_name</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>name</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_well_known_names</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>char ***<parameter>name</parameter></paramdef> |
| </funcprototype> |
| |
| <funcprototype> |
| <funcdef>int <function>sd_bus_creds_get_description</function></funcdef> |
| <paramdef>sd_bus_creds *<parameter>c</parameter></paramdef> |
| <paramdef>const char **<parameter>name</parameter></paramdef> |
| </funcprototype> |
| |
| </funcsynopsis> |
| </refsynopsisdiv> |
| |
| <refsect1> |
| <title>Description</title> |
| |
| <para>These functions return credential information from an |
| <parameter>sd_bus_creds</parameter> object. Credential objects may |
| be created with |
| <citerefentry><refentrytitle>sd_bus_creds_new_from_pid</refentrytitle><manvolnum>3</manvolnum></citerefentry>, |
| in which case they describe the credentials of the process |
| identified by the specified PID, with |
| <citerefentry><refentrytitle>sd_bus_get_name_creds</refentrytitle><manvolnum>3</manvolnum></citerefentry>, |
| in which case they describe the credentials of a bus peer |
| identified by the specified bus name, with |
| <citerefentry><refentrytitle>sd_bus_get_owner_creds</refentrytitle><manvolnum>3</manvolnum></citerefentry>, |
| in which case they describe the credentials of the creator of a |
| bus, or with |
| <citerefentry><refentrytitle>sd_bus_message_get_creds</refentrytitle><manvolnum>3</manvolnum></citerefentry>, |
| in which case they describe the credentials of the sender of the |
| message.</para> |
| |
| <para>Not all credential fields are part of every |
| <literal>sd_bus_creds</literal> object. Use |
| <citerefentry><refentrytitle>sd_bus_creds_get_mask</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| to determine the mask of fields available.</para> |
| |
| <para><function>sd_bus_creds_get_pid()</function> will retrieve |
| the PID (process identifier). Similarly, |
| <function>sd_bus_creds_get_ppid()</function> will retrieve the |
| parent PID. Note that PID 1 has no parent process, in which case |
| -ENXIO is returned.</para> |
| |
| <para><function>sd_bus_creds_get_tid()</function> will retrieve the |
| TID (thread identifier).</para> |
| |
| <para><function>sd_bus_creds_get_uid()</function> will retrieve |
| the numeric UID (user identifier). Similarly, |
| <function>sd_bus_creds_get_euid()</function> returns the effective |
| UID, <function>sd_bus_creds_get_suid()</function> the saved UID |
| and <function>sd_bus_creds_get_fsuid()</function> the file system |
| UID.</para> |
| |
| <para><function>sd_bus_creds_get_gid()</function> will retrieve the |
| numeric GID (group identifier). Similarly, |
| <function>sd_bus_creds_get_egid()</function> returns the effective |
| GID, <function>sd_bus_creds_get_sgid()</function> the saved GID |
| and <function>sd_bus_creds_get_fsgid()</function> the file system |
| GID.</para> |
| |
| <para><function>sd_bus_creds_get_supplementary_gids()</function> |
| will retrieve the supplementary GIDs list.</para> |
| |
| <para><function>sd_bus_creds_get_comm()</function> will retrieve the |
| comm field (truncated name of the executable, as stored in |
| <filename>/proc/<replaceable>pid</replaceable>/comm</filename>). |
| </para> |
| |
| <para><function>sd_bus_creds_get_tid_comm()</function> will retrieve |
| the comm field of the thread (as stored in |
| <filename>/proc/<replaceable>pid</replaceable>/task/<replaceable>tid</replaceable>/comm</filename>). |
| </para> |
| |
| <para><function>sd_bus_creds_get_exe()</function> will retrieve the path to the program executable (as |
| stored in the <filename>/proc/<replaceable>pid</replaceable>/exe</filename> link, but with the <literal> |
| (deleted)</literal> suffix removed). Note that kernel threads do not have an executable path, in which |
| case -ENXIO is returned. Note that this property should not be used for more than explanatory |
| information, in particular it should not be used for security-relevant decisions. That's because the |
| executable might have been replaced or removed by the time the value can be processed. Moreover, the |
| kernel exports this information in an ambiguous way (i.e. a deleted executable cannot be safely |
| distinguished from one whose name suffix is <literal> (deleted)</literal>).</para> |
| |
| <para><function>sd_bus_creds_get_cmdline()</function> will |
| retrieve an array of command line arguments (as stored in |
| <filename>/proc/<replaceable>pid</replaceable>/cmdline</filename>). Note |
| that kernel threads do not have a command line, in which case |
| -ENXIO is returned.</para> |
| |
| <para><function>sd_bus_creds_get_cgroup()</function> will retrieve |
| the control group path. See <ulink |
| url="https://www.kernel.org/doc/Documentation/cgroup-v1/cgroups.txt">cgroups.txt</ulink>. |
| </para> |
| |
| <para><function>sd_bus_creds_get_unit()</function> will retrieve |
| the systemd unit name (in the system instance of systemd) that the |
| process is a part of. See |
| <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. For |
| processes that are not part of a unit, returns -ENXIO. |
| </para> |
| |
| <para><function>sd_bus_creds_get_user_unit()</function> will |
| retrieve the systemd unit name (in the user instance of systemd) |
| that the process is a part of. See |
| <citerefentry><refentrytitle>systemd.unit</refentrytitle><manvolnum>5</manvolnum></citerefentry>. For |
| processes that are not part of a user unit, returns -ENXIO. |
| </para> |
| |
| <para><function>sd_bus_creds_get_slice()</function> will retrieve |
| the systemd slice (a unit in the system instance of systemd) that |
| the process is a part of. See |
| <citerefentry><refentrytitle>systemd.slice</refentrytitle><manvolnum>5</manvolnum></citerefentry>. Similarly, |
| <function>sd_bus_creds_get_user_slice()</function> retrieves the |
| systemd slice of the process, in the user instance of systemd. |
| </para> |
| |
| <para><function>sd_bus_creds_get_session()</function> will |
| retrieve the identifier of the login session that the process is |
| a part of. Please note the login session may be limited to a stub |
| process or two. User processes may instead be started from their |
| systemd user manager, e.g. GUI applications started using DBus |
| activation, as well as service processes which are shared between |
| multiple logins of the same user. For processes that are not part |
| of a session, returns -ENXIO.</para> |
| |
| <para><function>sd_bus_creds_get_owner_uid()</function> will |
| retrieve the numeric UID (user identifier) of the user who owns |
| the user unit or login session that the process is a part of. See |
| <citerefentry><refentrytitle>systemd-logind.service</refentrytitle><manvolnum>8</manvolnum></citerefentry>. |
| For processes that are not part of a user unit or session, returns |
| -ENXIO. |
| </para> |
| |
| <para><function>sd_bus_creds_has_effective_cap()</function> will check whether the capability specified by |
| <parameter>capability</parameter> was set in the effective capabilities mask. A positive return value means that it |
| was set, zero means that it was not set, and a negative return value indicates an error. See <citerefentry |
| project='man-pages'><refentrytitle>capabilities</refentrytitle><manvolnum>7</manvolnum></citerefentry> and the |
| <varname>AmbientCapabilities=</varname> and <varname>CapabilityBoundingSet=</varname> settings in |
| <citerefentry><refentrytitle>systemd.exec</refentrytitle><manvolnum>5</manvolnum></citerefentry>. |
| </para> |
| |
| <para><function>sd_bus_creds_has_permitted_cap()</function> is |
| similar to <function>sd_bus_creds_has_effective_cap()</function>, |
| but will check the permitted capabilities mask.</para> |
| |
| <para><function>sd_bus_creds_has_inheritable_cap()</function> is |
| similar to <function>sd_bus_creds_has_effective_cap()</function>, |
| but will check the inheritable capabilities mask.</para> |
| |
| <para><function>sd_bus_creds_has_bounding_cap()</function> is |
| similar to <function>sd_bus_creds_has_effective_cap()</function>, |
| but will check the bounding capabilities mask.</para> |
| |
| <para><function>sd_bus_creds_get_selinux_context()</function> will |
| retrieve the SELinux security context (label) of the process.</para> |
| |
| <para><function>sd_bus_creds_get_audit_session_id()</function> |
| will retrieve the audit session identifier of the process. Returns |
| -ENXIO for processes that are not part of an audit session.</para> |
| |
| <para><function>sd_bus_creds_get_audit_login_uid()</function> will |
| retrieve the audit user login identifier (the identifier of the |
| user who is "responsible" for the session). Returns -ENXIO for |
| processes that are not part of an audit session.</para> |
| |
| <para><function>sd_bus_creds_get_tty()</function> will retrieve |
| the controlling TTY, without the prefixing "/dev/". Returns -ENXIO |
| for processes that have no controlling TTY.</para> |
| |
| <para><function>sd_bus_creds_get_unique_name()</function> will |
| retrieve the D-Bus unique name. See <ulink |
| url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus">The |
| D-Bus specification</ulink>.</para> |
| |
| <para><function>sd_bus_creds_get_well_known_names()</function> will |
| retrieve the set of D-Bus well-known names. See <ulink |
| url="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus">The |
| D-Bus specification</ulink>.</para> |
| |
| <para><function>sd_bus_creds_get_description()</function> will |
| retrieve a descriptive name of the bus connection of the |
| peer. This name is useful to discern multiple bus connections by |
| the same peer, and may be altered by the peer with the |
| <citerefentry><refentrytitle>sd_bus_set_description</refentrytitle><manvolnum>3</manvolnum></citerefentry> |
| call.</para> |
| |
| <para>All functions that take a <parameter>const |
| char**</parameter> parameter will store the answer there as an |
| address of a <constant>NUL</constant>-terminated string. It will be valid as long as |
| <parameter>c</parameter> remains valid, and should not be freed or |
| modified by the caller.</para> |
| |
| <para>All functions that take a <parameter>char***</parameter> |
| parameter will store the answer there as an address of an array |
| of strings. Each individual string is <constant>NUL</constant>-terminated, and the |
| array is <constant>NULL</constant>-terminated as a whole. It will be valid as long as |
| <parameter>c</parameter> remains valid, and should not be freed or |
| modified by the caller.</para> |
| </refsect1> |
| |
| <refsect1> |
| <title>Return Value</title> |
| |
| <para>On success, these calls return 0 or a positive integer. On |
| failure, these calls return a negative errno-style error code. |
| </para> |
| |
| <refsect2> |
| <title>Errors</title> |
| |
| <para>Returned errors may indicate the following problems:</para> |
| |
| <variablelist> |
| <varlistentry> |
| <term><constant>-ENODATA</constant></term> |
| |
| <listitem><para>The given field is not available in the credentials object |
| <parameter>c</parameter>.</para> |
| </listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><constant>-ENXIO</constant></term> |
| |
| <listitem><para>The given field is not specified for the described process or peer. This will be |
| returned by <function>sd_bus_creds_get_unit()</function>, |
| <function>sd_bus_creds_get_slice()</function>, <function>sd_bus_creds_get_user_unit()</function>, |
| <function>sd_bus_creds_get_user_slice()</function>, and |
| <function>sd_bus_creds_get_session()</function> if the process is not part of a systemd system |
| unit, systemd user unit, systemd slice, or logind session. It will be returned by |
| <function>sd_bus_creds_get_owner_uid()</function> if the process is not part of a systemd user unit |
| or logind session. It will also be returned by <function>sd_bus_creds_get_exe()</function> and |
| <function>sd_bus_creds_get_cmdline()</function> for kernel threads (since these are not started |
| from an executable binary, nor have a command line), and by |
| <function>sd_bus_creds_get_audit_session_id()</function> and |
| <function>sd_bus_creds_get_audit_login_uid()</function> when the process is not part of an audit |
| session, and <function>sd_bus_creds_get_tty()</function> if the process has no controlling |
| TTY.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><constant>-EINVAL</constant></term> |
| |
| <listitem><para>Specified pointer parameter is <constant>NULL</constant>.</para></listitem> |
| </varlistentry> |
| |
| <varlistentry> |
| <term><constant>-ENOMEM</constant></term> |
| |
| <listitem><para>Memory allocation failed.</para></listitem> |
| </varlistentry> |
| </variablelist> |
| </refsect2> |
| </refsect1> |
| |
| <xi:include href="libsystemd-pkgconfig.xml" /> |
| |
| <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>sd_bus_creds_new_from_pid</refentrytitle><manvolnum>2</manvolnum></citerefentry>, |
| <citerefentry project='man-pages'><refentrytitle>fork</refentrytitle><manvolnum>2</manvolnum></citerefentry>, |
| <citerefentry project='man-pages'><refentrytitle>execve</refentrytitle><manvolnum>2</manvolnum></citerefentry>, |
| <citerefentry project='man-pages'><refentrytitle>credentials</refentrytitle><manvolnum>7</manvolnum></citerefentry>, |
| <citerefentry project='man-pages'><refentrytitle>free</refentrytitle><manvolnum>3</manvolnum></citerefentry>, |
| <citerefentry project='man-pages'><refentrytitle>proc</refentrytitle><manvolnum>5</manvolnum></citerefentry>, |
| <citerefentry><refentrytitle>systemd.journal-fields</refentrytitle><manvolnum>7</manvolnum></citerefentry> |
| </para> |
| </refsect1> |
| |
| </refentry> |