Merge branch 'egil/20/erts/signal-service/OTP-14186'

* egil/20/erts/signal-service/OTP-14186:
  kernel: Document signal server
  erts: Use os module instead of erts_internal for set_signal/2
  erts: Do not handle SIGILL
  erts: Fix thread suspend in crashdump
  erts: Do not enable SIGINT
  erts: Use generic signal handler
  erts: Add OS signal tests
  erts: Handle SIGUSR1 via signal service instead
  erts: Handle SIGTERM via signal service instead
  kernel: Add gen_event signal server and default handler
  erts: Add SIGHUP signal handler
  erts: Remove whitespace errors

Conflicts:
	erts/emulator/beam/bif.tab

1 files changed, 28 insertions, 3 deletions

diff --git a/lib/kernel/doc/src/os.xml b/lib/kernel/doc/src/os.xml
index 739ac35d2a..6ba69d12a3 100644
--- a/lib/kernel/doc/src/os.xml
+++ b/lib/kernel/doc/src/os.xml
@@ -11,7 +11,7 @@
       Licensed under the Apache License, Version 2.0 (the "License");
       you may not use this file except in compliance with the License.
       You may obtain a copy of the License at
- 
+
           http://www.apache.org/licenses/LICENSE-2.0
 
       Unless required by applicable law or agreed to in writing, software
@@ -19,7 +19,7 @@
       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
       See the License for the specific language governing permissions and
       limitations under the License.
-    
+
     </legalnotice>
 
     <title>os</title>
@@ -156,6 +156,32 @@ DirOut = os:cmd("dir"), % on Win32 platform</code>
     </func>
 
     <func>
+      <name name="set_signal" arity="2"/>
+      <fsummary>Enables or disables handling of OS signals.</fsummary>
+      <desc>
+          <p>Enables or disables OS signals.</p>
+          <p>Each signal my be set to one of the following options:</p>
+          <taglist>
+              <tag><c>ignore</c></tag>
+              <item>
+                  This signal will be ignored.
+              </item>
+
+              <tag><c>default</c></tag>
+              <item>
+                  This signal will use the default signal handler for the operating system.
+              </item>
+
+              <tag><c>handle</c></tag>
+              <item>
+                  This signal will notify <c>erl_signal_server</c> when it is received by
+                  the Erlang runtime system.
+              </item>
+          </taglist>
+      </desc>
+    </func>
+
+    <func>
       <name name="system_time" arity="0"/>
       <fsummary>Current OS system time.</fsummary>
       <desc>
@@ -296,4 +322,3 @@ calendar:now_to_universal_time(TS),
     </func>
   </funcs>
 </erlref>
-