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diff --git a/man/sd_bus_creds_get_euid.html b/man/sd_bus_creds_get_euid.html new file mode 100644 index 0000000000..1da4fbf36b --- /dev/null +++ b/man/sd_bus_creds_get_euid.html @@ -0,0 +1,166 @@ +<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>sd_bus_creds_get_pid</title><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><style> + a.headerlink { + color: #c60f0f; + font-size: 0.8em; + padding: 0 4px 0 4px; + text-decoration: none; + visibility: hidden; + } + + a.headerlink:hover { + background-color: #c60f0f; + color: white; + } + + h1:hover > a.headerlink, h2:hover > a.headerlink, h3:hover > a.headerlink, dt:hover > a.headerlink { + visibility: visible; + } + </style><a href="index.html">Index </a>· + <a href="systemd.directives.html">Directives </a>· + <a href="../python-systemd/index.html">Python </a>· + <a href="../libudev/index.html">libudev </a>· + <a href="../libudev/index.html">gudev </a><span style="float:right">systemd 220</span><hr><div class="refentry"><a name="sd_bus_creds_get_pid"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p>sd_bus_creds_get_pid, sd_bus_creds_get_ppid, sd_bus_creds_get_tid, sd_bus_creds_get_uid, sd_bus_creds_get_euid, sd_bus_creds_get_suid, sd_bus_creds_get_fsuid, sd_bus_creds_get_gid, sd_bus_creds_get_egid, sd_bus_creds_get_sgid, sd_bus_creds_get_fsgid, sd_bus_creds_get_supplementary_gids, sd_bus_creds_get_comm, sd_bus_creds_get_tid_comm, sd_bus_creds_get_exe, sd_bus_creds_get_cmdline, sd_bus_creds_get_cgroup, sd_bus_creds_get_unit, sd_bus_creds_get_user_unit, sd_bus_creds_get_slice, sd_bus_creds_get_session, sd_bus_creds_get_owner_uid, sd_bus_creds_has_effective_cap, sd_bus_creds_has_permitted_cap, sd_bus_creds_has_inheritable_cap, sd_bus_creds_has_bounding_cap, sd_bus_creds_get_selinux_context, sd_bus_creds_get_audit_session_id, sd_bus_creds_get_audit_login_uid, sd_bus_creds_get_tty, sd_bus_creds_get_unique_name, sd_bus_creds_get_well_known_names, sd_bus_creds_get_description — Retrieve fields from a credentials object</p></div><div class="refsynopsisdiv"><h2>Synopsis</h2><div class="funcsynopsis"><pre class="funcsynopsisinfo">#include <systemd/sd-bus.h></pre><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_pid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>pid_t *<var class="pdparam">pid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_ppid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>pid_t *<var class="pdparam">ppid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_tid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>pid_t *<var class="pdparam">tid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_uid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uid_t *<var class="pdparam">uid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_euid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uid_t *<var class="pdparam">uid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_suid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uid_t *<var class="pdparam">uid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_fsuid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uid_t *<var class="pdparam">uid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_gid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>gid_t *<var class="pdparam">gid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_egid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>gid_t *<var class="pdparam">gid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_sgid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>gid_t *<var class="pdparam">gid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_fsgid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>gid_t *<var class="pdparam">gid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_supplementary_gids</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const gid_t **<var class="pdparam">gids</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_comm</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">comm</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_tid_comm</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">comm</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_exe</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">exe</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_cmdline</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>char ***<var class="pdparam">cmdline</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_cgroup</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">cgroup</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_unit</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">unit</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_user_unit</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">unit</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_slice</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">slice</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_session</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">slice</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_owner_uid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uid_t *<var class="pdparam">uid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_has_effective_cap</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">capability</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_has_permitted_cap</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">capability</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_has_inheritable_cap</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">capability</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_has_bounding_cap</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>int <var class="pdparam">capability</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_selinux_context</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">context</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_audit_session_id</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uint32_t *<var class="pdparam">sessionid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_audit_login_uid</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>uid_t *<var class="pdparam">loginuid</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_tty</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">tty</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_unique_name</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_well_known_names</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>char ***<var class="pdparam">name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div><table border="0" class="funcprototype-table" summary="Function synopsis" style="cellspacing: 0; cellpadding: 0;"><tr><td><code class="funcdef">int <b class="fsfunc">sd_bus_creds_get_description</b>(</code></td><td>sd_bus_creds *<var class="pdparam">c</var>, </td></tr><tr><td> </td><td>const char **<var class="pdparam">name</var><code>)</code>;</td></tr></table><div class="funcprototype-spacer"> </div></div></div><div class="refsect1"><a name="idm140680959593040"></a><h2 id="Description">Description<a class="headerlink" title="Permalink to this headline" href="#Description">¶</a></h2><p>These functions return information from an + <em class="parameter"><code>sd_bus_creds</code></em> credential object. Credential + objects may be created with + <a href="sd_bus_creds_new_from_pid.html"><span class="citerefentry"><span class="refentrytitle">sd_bus_creds_new_from_pid</span>(3)</span></a>, + in which case they describe the credentials of the process + identified by the specified PID, with + <a href="sd_bus_get_name_creds.html"><span class="citerefentry"><span class="refentrytitle">sd_bus_get_name_creds</span>(3)</span></a>, + in which case they describe the credentials of a bus peer + identified by the specified bus name, or with + <a href="sd_bus_get_owner_creds.html"><span class="citerefentry"><span class="refentrytitle">sd_bus_get_owner_creds</span>(3)</span></a>, + in which case they describe the credentials of the creator of a + bus.</p><p><code class="function">sd_bus_creds_get_pid()</code> will retrieve + the PID (process identifier). Similar, + <code class="function">sd_bus_creds_get_ppid()</code> will retrieve the + parent PID. Note that PID 1 has no parent process, in which case + -ENXIO is returned.</p><p><code class="function">sd_bus_creds_get_tid()</code> will retrieve the + TID (thread identifier).</p><p><code class="function">sd_bus_creds_get_uid()</code> will retrieve + the numeric UID (user identifier). Similar, + <code class="function">sd_bus_creds_get_euid()</code> returns the effective + UID, <code class="function">sd_bus_creds_get_suid()</code> the saved UID + and <code class="function">sd_bus_creds_get_fsuid()</code> the file system + UID.</p><p><code class="function">sd_bus_creds_get_gid()</code> will retrieve the + numeric GID (group identifier). Similar, + <code class="function">sd_bus_creds_get_egid()</code> returns the effective + GID, <code class="function">sd_bus_creds_get_sgid()</code> the saved GID + and <code class="function">sd_bus_creds_get_fsgid()</code> the file system + GID.</p><p><code class="function">sd_bus_creds_get_supplementary_gids()</code> + will retrieve the supplementary GIDs list.</p><p><code class="function">sd_bus_creds_get_comm()</code> will retrieve the + comm field (truncated name of the executable, as stored in + <code class="filename">/proc/<em class="replaceable"><code>pid</code></em>/comm</code>). + </p><p><code class="function">sd_bus_creds_get_tid_comm()</code> will retrieve + the comm field of the thread (as stored in + <code class="filename">/proc/<em class="replaceable"><code>pid</code></em>/task/<em class="replaceable"><code>tid</code></em>/comm</code>). + </p><p><code class="function">sd_bus_creds_get_exe()</code> will retrieve + the path to the program executable (as stored in the + <code class="filename">/proc/<em class="replaceable"><code>pid</code></em>/exe</code> + link, but with "<code class="literal"> (deleted)</code>" suffix removed). Note + that kernel threads do not have an executable path, in which case + -ENXIO is returned.</p><p><code class="function">sd_bus_creds_get_cmdline()</code> will + retrieve an array of command line arguments (as stored in + <code class="filename">/proc/<em class="replaceable"><code>pid</code></em>/cmdline</code>). Note + that kernel threads do not have a command line, in which case + -ENXIO is returned.</p><p><code class="function">sd_bus_creds_get_cgroup()</code> will retrieve + the cgroup path. See <a class="ulink" href="https://www.kernel.org/doc/Documentation/cgroups/cgroups.txt" target="_top">cgroups.txt</a>. + </p><p><code class="function">sd_bus_creds_get_unit()</code> will retrieve + the systemd unit name (in the system instance of systemd) that the + process is part of. See + <a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>. For + processes that are not part of a unit returns -ENXIO. + </p><p><code class="function">sd_bus_creds_get_user_unit()</code> will + retrieve the systemd unit name (in the user instance of systemd) + that the process is part of. See + <a href="systemd.unit.html"><span class="citerefentry"><span class="refentrytitle">systemd.unit</span>(5)</span></a>. For + processes that are not part of a user unit returns -ENXIO. + </p><p><code class="function">sd_bus_creds_get_slice()</code> will retrieve + the systemd slice (a unit in the system instance of systemd) that + the process is part of. See + <a href="systemd.slice.html"><span class="citerefentry"><span class="refentrytitle">systemd.slice</span>(5)</span></a>. + </p><p><code class="function">sd_bus_creds_get_session()</code> will + retrieve the logind session that the process is part of. See + <a href="systemd-logind.service.html"><span class="citerefentry"><span class="refentrytitle">systemd-logind.service</span>(8)</span></a>. For + processes that are not part of a session returns -ENXIO. + </p><p><code class="function">sd_bus_creds_get_owner_uid()</code> will + retrieve the numeric UID (user identifier) of the user who owns + the session that the process is part of. See + <a href="systemd.slice.html"><span class="citerefentry"><span class="refentrytitle">systemd.slice</span>(5)</span></a> + For processes that are not part of a session returns -ENXIO. + </p><p><code class="function">sd_bus_creds_has_effective_cap()</code> will + check whether the capability specified by + <em class="parameter"><code>capability</code></em> was set in the effective + capabilities mask. A positive return value means that is was + set, zero means that it was not set, and a negative return + value signifies an error. See + <a href="http://man7.org/linux/man-pages/man7/capabilities.7.html"><span class="citerefentry"><span class="refentrytitle">capabilities</span>(7)</span></a> + and <code class="varname">Capabilities=</code> and + <code class="varname">CapabilityBoundingSet=</code> settings in + <a href="systemd.exec.html"><span class="citerefentry"><span class="refentrytitle">systemd.exec</span>(5)</span></a>. + </p><p><code class="function">sd_bus_creds_has_permitted_cap()</code> is + similar to <code class="function">sd_bus_creds_has_effective_cap()</code>, + but will check the permitted capabilities mask.</p><p><code class="function">sd_bus_creds_has_inheritable_cap()</code> is + similar to <code class="function">sd_bus_creds_has_effective_cap()</code>, + but will check the inheritable capabilities mask.</p><p><code class="function">sd_bus_creds_has_bounding_cap()</code> is + similar to <code class="function">sd_bus_creds_has_effective_cap()</code>, + but will check the bounding capabilities mask.</p><p><code class="function">sd_bus_creds_get_selinux_context()</code> will + retrieve the SELinux security context (label) of the process.</p><p><code class="function">sd_bus_creds_get_audit_session_id()</code> + will retrieve the audit session identifier of the process. Returns + -ENXIO for processes that are not part of an audit session.</p><p><code class="function">sd_bus_creds_get_audit_login_uid()</code> 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.</p><p><code class="function">sd_bus_creds_get_tty()</code> will retrieve + the controlling TTY. Returns -ENXIO for processes that have no + controlling TTY.</p><p><code class="function">sd_bus_creds_get_unique_name()</code> will + retrieve the D-Bus unique name. See <a class="ulink" href="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus" target="_top">The + D-Bus specification</a>.</p><p><code class="function">sd_bus_creds_get_well_known_names()</code> will + retrieve the set of D-Bus well-known names. See <a class="ulink" href="http://dbus.freedesktop.org/doc/dbus-specification.html#message-protocol-names-bus" target="_top">The + D-Bus specification</a>.</p><p><code class="function">sd_bus_creds_get_description()</code> 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 + <a href="sd_bus_set_description.html"><span class="citerefentry"><span class="refentrytitle">sd_bus_set_description</span>(3)</span></a> + call.</p><p>All functions that take a <em class="parameter"><code>const + char**</code></em> parameter will store the answer there as an + address of a NUL-terminated string. It will be valid as long as + <em class="parameter"><code>c</code></em> remains valid, and should not be freed or + modified by the caller.</p><p>All functions that take a <em class="parameter"><code>char***</code></em> + parameter will store the answer there as an address of a an array + of strings. Each individual string is NUL-terminated, and the + array is NULL-terminated as a whole. It will be valid as long as + <em class="parameter"><code>c</code></em> remains valid, and should not be freed or + modified by the caller.</p></div><div class="refsect1"><a name="idm140680959538576"></a><h2 id="Return Value">Return Value<a class="headerlink" title="Permalink to this headline" href="#Return%20Value">¶</a></h2><p>On success, these calls return 0 or a positive integer. On + failure, these calls return a negative errno-style error code. + </p></div><div class="refsect1"><a name="idm140680959537280"></a><h2 id="Errors">Errors<a class="headerlink" title="Permalink to this headline" href="#Errors">¶</a></h2><p>Returned errors may indicate the following problems:</p><div class="variablelist"><dl class="variablelist"><dt id="-ENODATA"><span class="term"><code class="constant">-ENODATA</code></span><a class="headerlink" title="Permalink to this term" href="#-ENODATA">¶</a></dt><dd><p>Given field is not available in the + credentials object <em class="parameter"><code>c</code></em>.</p></dd><dt id="-ENXIO"><span class="term"><code class="constant">-ENXIO</code></span><a class="headerlink" title="Permalink to this term" href="#-ENXIO">¶</a></dt><dd><p>Given field is not specified for the described + process or peer. This will be returned by + <code class="function">sd_bus_get_unit()</code>, + <code class="function">sd_bus_get_user_unit()</code>, + <code class="function">sd_bus_get_slice()</code>, + <code class="function">sd_bus_get_session()</code>, and + <code class="function">sd_bus_get_owner_uid()</code> if the process is + not part of a systemd system unit, systemd user unit, systemd + slice, or logind session. It will also be returned by + <code class="function">sd_bus_creds_get_exe()</code> and + <code class="function">sd_bus_creds_get_cmdline()</code> for kernel + threads (since these aren't started from an executable binary + or have a command line), + <code class="function">sd_bus_creds_get_audit_session_id()</code> and + <code class="function">sd_bus_creds_get_audit_login_uid()</code> when + the process is not part of an audit session, and + <code class="function">sd_bus_creds_get_tty()</code> if the process has + no controlling TTY. + </p></dd><dt id="-EINVAL"><span class="term"><code class="constant">-EINVAL</code></span><a class="headerlink" title="Permalink to this term" href="#-EINVAL">¶</a></dt><dd><p>Specified pointer parameter is <code class="constant">NULL</code>. + </p></dd><dt id="-ENOMEM"><span class="term"><code class="constant">-ENOMEM</code></span><a class="headerlink" title="Permalink to this term" href="#-ENOMEM">¶</a></dt><dd><p>Memory allocation failed.</p></dd></dl></div></div><div class="refsect1"><a name="idm140680959521920"></a><h2 id="Notes">Notes<a class="headerlink" title="Permalink to this headline" href="#Notes">¶</a></h2><p><code class="function">sd_bus_open_user()</code> and other functions + described here are available as a shared library, which can be + compiled and linked to with the + <code class="constant">libsystemd</code> <a href="http://linux.die.net/man/1/pkg-config"><span class="citerefentry"><span class="refentrytitle">pkg-config</span>(1)</span></a> + file.</p></div><div class="refsect1"><a name="idm140680959518736"></a><h2 id="See Also">See Also<a class="headerlink" title="Permalink to this headline" href="#See%20Also">¶</a></h2><p> + <a href="systemd.html"><span class="citerefentry"><span class="refentrytitle">systemd</span>(1)</span></a>, + <a href="sd-bus.html"><span class="citerefentry"><span class="refentrytitle">sd-bus</span>(3)</span></a>, + <a href="http://man7.org/linux/man-pages/man2/fork.2.html"><span class="citerefentry"><span class="refentrytitle">fork</span>(2)</span></a>, + <a href="http://man7.org/linux/man-pages/man2/execve.2.html"><span class="citerefentry"><span class="refentrytitle">execve</span>(2)</span></a>, + <a href="http://man7.org/linux/man-pages/man7/credentials.7.html"><span class="citerefentry"><span class="refentrytitle">credentials</span>(7)</span></a>, + <a href="http://man7.org/linux/man-pages/man3/free.3.html"><span class="citerefentry"><span class="refentrytitle">free</span>(3)</span></a>, + <a href="http://man7.org/linux/man-pages/man5/proc.5.html"><span class="citerefentry"><span class="refentrytitle">proc</span>(5)</span></a>, + <a href="systemd.journal-fields.html"><span class="citerefentry"><span class="refentrytitle">systemd.journal-fields</span>(7)</span></a> + </p></div></div></body></html> |