From 707b66c66381c899d7ef640e158ffdd5bcff4deb Mon Sep 17 00:00:00 2001
From: Lennart Poettering <lennart@poettering.net>
Date: Fri, 4 Sep 2015 09:05:52 +0200
Subject: sd-login: rework error handling

Makre sure we always return sensible errors for the various, following
the same rules, and document them in a comment in sd-login.c. Also,
update all relevant man pages accordingly.
---
 man/sd_uid_get_state.xml | 39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

(limited to 'man/sd_uid_get_state.xml')

diff --git a/man/sd_uid_get_state.xml b/man/sd_uid_get_state.xml
index b158f3528c..13ddf08c65 100644
--- a/man/sd_uid_get_state.xml
+++ b/man/sd_uid_get_state.xml
@@ -169,6 +169,45 @@
     errno-style error code.</para>
   </refsect1>
 
+  <refsect1>
+    <title>Errors</title>
+
+    <para>Returned errors may indicate the following problems:</para>
+
+    <variablelist>
+
+      <varlistentry>
+        <term><constant>-ENODATA</constant></term>
+
+        <listitem><para>Given field is not specified for the described
+        user.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><constant>-ENXIO</constant></term>
+
+        <listitem><para>The specified seat is unknown.</para>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><constant>-EINVAL</constant></term>
+
+        <listitem><para>An input parameter was invalid (out of range,
+        or NULL, where that's not accepted). This is also returned if
+        the passed user ID is 0xFFFF or 0xFFFFFFFF, which are
+        undefined on Linux.</para></listitem>
+      </varlistentry>
+
+      <varlistentry>
+        <term><constant>-ENOMEM</constant></term>
+
+        <listitem><para>Memory allocation failed.</para></listitem>
+      </varlistentry>
+    </variablelist>
+  </refsect1>
+
   <refsect1>
     <title>Notes</title>
 
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