Introduce system_information:sanity_check()

1 files changed, 98 insertions, 0 deletions

diff --git a/lib/runtime_tools/doc/src/system_information.xml b/lib/runtime_tools/doc/src/system_information.xml
new file mode 100644
index 0000000000..b586334ae7
--- /dev/null
+++ b/lib/runtime_tools/doc/src/system_information.xml
@@ -0,0 +1,98 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!DOCTYPE erlref SYSTEM "erlref.dtd">
+
+<erlref>
+  <header>
+    <copyright>
+      <year>2014</year>
+      <holder>Ericsson AB. All Rights Reserved.</holder>
+    </copyright>
+    <legalnotice>
+      The contents of this file are subject to the Erlang Public License,
+      Version 1.1, (the "License"); you may not use this file except in
+      compliance with the License. You should have received a copy of the
+      Erlang Public License along with this software. If not, it can be
+      retrieved online at http://www.erlang.org/.
+    
+      Software distributed under the License is distributed on an "AS IS"
+      basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+      the License for the specific language governing rights and limitations
+      under the License.
+    
+    </legalnotice>
+
+    <title></title>
+    <prepared></prepared>
+    <responsible></responsible>
+    <docno>1</docno>
+    <approved></approved>
+    <checked></checked>
+    <date></date>
+    <rev></rev>
+    <file>system_information.xml</file>
+  </header>
+  <module>system_information</module>
+  <modulesummary>System Information</modulesummary>
+  <description>
+    <p></p>
+  </description>
+  <funcs>
+    <func>
+      <name name="sanity_check" arity="0"/>
+      <fsummary>Perform a sanity check</fsummary>
+      <desc>
+        <p>Performs a sanity check on the system. If no issues
+	were found, <c>ok</c> is returned. If issues were
+	found, <c>{failed, <anno>Failures</anno>}</c> is
+	returned. All failures found will be part of the
+	<c><anno>Failures</anno></c> list. Currently defined
+	<c><anno>Failure</anno></c> elements in the
+	<c><anno>Failures</anno></c> list:</p>
+	<taglist>
+	  <tag><c><anno>InvalidAppFile</anno></c></tag>
+	  <item><p>An application has an invalid <c>.app</c> file. The
+	  second element identifies the application which has the
+	  invalid <c>.app</c> file.</p></item>
+	  <tag><c><anno>InvalidApplicationVersion</anno></c></tag>
+	  <item><p>An application has an invalid application version.
+	  The second element identifies the application version that
+	  is invalid.</p></item>
+	  <tag><c><anno>MissingRuntimeDependencies</anno></c></tag>
+	  <item><p>An application is missing
+	  <seealso marker="kernel:app#runtime_dependencies">runtime
+	  dependencies</seealso>. The second element identifies the
+	  application (with version) that has missing dependencies.
+	  The third element contains the missing dependencies.</p>
+	  <p>Note that this check use application versions that
+	  are loaded, or will be loaded when used. You might have
+	  application versions that satisfies all dependencies
+	  installed in the system, but if those are not loaded this
+	  check will fail. The system will of course also fail when
+	  used like this. This may happen when you have multiple 
+	  <seealso marker="doc/system_principles:versions">branched
+	  versions</seealso> of the same application installed in the
+	  system, but you do not use a
+	  <seealso marker="doc/system_principles:system_principles#BOOTSCRIPT">boot
+	  script</seealso> identifing the correct application version.</p>
+	  </item>
+	</taglist>
+	<p>Currently the sanity check is limited to verifying
+	runtime dependencies found in the <c>.app</c> files of
+	all applications. More checks will be introduced in the
+	future. This implies that the return type <em>will</em>
+	change in the future.</p>
+	<note><p>An <c>ok</c> return value only means that
+	<c>sanity_check/0</c> did not find any issues, <em>not</em>
+	that no issues exist.</p></note>
+      </desc>
+    </func>
+    <func>
+      <name name="to_file" arity="1"/>
+      <fsummary>Write miscellaneous system information to file</fsummary>
+      <desc><p>Writes  miscellaneous system information to file. This
+      information will typically be requested by the Erlang/OTP team
+      at Ericsson AB when reporting an issue.</p></desc>
+    </func>
+  </funcs>
+ </erlref>
+