From 59708bb0f71c72bd06e1e30ed68e8bea6759f65d Mon Sep 17 00:00:00 2001
From: "Alexander A. Klimov" <alexander.klimov@icinga.com>
Date: Fri, 10 May 2019 15:19:53 +0200
Subject: [PATCH] icingacli web serve: redirect standard I/O to /dev/null after
 fork(2)

---
 application/clicommands/WebCommand.php | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/application/clicommands/WebCommand.php b/application/clicommands/WebCommand.php
index 8e4306ce8..67d50a343 100644
--- a/application/clicommands/WebCommand.php
+++ b/application/clicommands/WebCommand.php
@@ -85,6 +85,17 @@ class WebCommand extends Command
             // pcntl_wait($status);
         } else {
              // child
+
+            // Replace console with /dev/null by first freeing the (lowest possible) FDs 0, 1 and 2
+            // and then opening /dev/null once for every one of them (open(2) chooses the lowest free FD).
+
+            fclose(STDIN);
+            fclose(STDOUT);
+            fclose(STDERR);
+
+            fopen('/dev/null', 'rb');
+            fopen('/dev/null', 'wb');
+            fopen('/dev/null', 'wb');
         }
     }
 }