From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Date: Fri, 19 Jul 2013 17:49:36 +0000 (-0400)
Subject: rcS: Fix the annoying "init: starting pid XYZ, tty '/dev/hvc0': '/bin/sh, not found"
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=751bc4fcb95067293af1bfb704aac740b7b8e6bf;p=xentesttools%2Fbootstrap.git

rcS: Fix the annoying "init: starting pid XYZ, tty '/dev/hvc0': '/bin/sh, not found"

The reason the /etc/inittab was not re-read (even
thought we did an kill -1 1 within this startup
script) is b/c:

(from busybox/init/init.c)
/*
 * NB: while SYSINIT/WAIT/ONCE are being processed,
 * SIGHUP ("reread /etc/inittab") will be ignored.
 * Rationale: it would be ambiguous whether SYSINIT/WAIT/ONCE
 * need to be rerun or not.
 */

and init.d/rcS is SYSINIT - so no SIGHUP can be done as
that is running. As such we just spawn a nohup subprocess that will
do it for us.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---

diff --git a/root_image/etc/init.d/rcS b/root_image/etc/init.d/rcS
index 251c03e..4c5a2a8 100755
--- a/root_image/etc/init.d/rcS
+++ b/root_image/etc/init.d/rcS
@@ -107,14 +107,16 @@ if [ $XEND_LOAD -eq 1 ]; then
 	else
 		echo "run_hotplug_scripts=0" >> /etc/xen/xl.conf
 	fi
-	rm -f /dev/ttyS0
-	ln -s /dev/null /dev/ttyS0
-	sed -i 's/\(^ttyS0.*\)/# \1/' /etc/inittab
+	echo "hvc0::respawn:/bin/sh" >> /etc/inittab
+	#rm -f /dev/ttyS0
+	#ln -s /dev/null /dev/ttyS0
+	#sed -i 's/\(^ttyS0.*\)/# \1/' /etc/inittab
 else
-	rm -f /dev/hvc0
-	ln -s /dev/null /dev/hvc0
-	sed -i 's/\(^hvc0.*\)/# \1/' /etc/inittab
-	echo "You might have to do kill -1 1 if you see 'can't open /dev/hvc0'"
+	#rm -f /dev/hvc0
+	#ln -s /dev/null /dev/hvc0
+	#sed -i 's/\(^hvc0.*\)/# \1/' /etc/inittab
+	#echo "You might have to do kill -1 1 if you see 'can't open /dev/hvc0'"
+	echo "ttyS0::respawn:/bin/sh" >> /etc/inittab
 fi
 PATH=$PATH:/usr/bin:/usr/sbin
 
@@ -159,3 +161,7 @@ if [ $? == 0 ]; then
 			;;
 	esac
 fi
+echo "while (true); do  if [ -e /tmp/go ]; then   sleep 2;init -q; rm /tmp/go; break;  fi;  sleep 1;  echo "."; done" >> /tmp/reinit
+chmod 755 /tmp/reinit
+nohup bash /tmp/reinit 1>/dev/null 2>/dev/null &
+touch /tmp/go
diff --git a/root_image/etc/inittab b/root_image/etc/inittab
index 5266a35..b154849 100644
--- a/root_image/etc/inittab
+++ b/root_image/etc/inittab
@@ -1,7 +1,4 @@
 ::sysinit:/etc/init.d/rcS
 ::ctrlaltdel:/sbin/reboot
 ::shutdown:/etc/init.d/halt
-tty0::respawn:/bin/sh
 tty1::respawn:/bin/sh
-ttyS0::respawn:/bin/sh
-hvc0::respawn:/bin/sh