Redirect stdin from /dev/null when starting a jail:

  At least in RELENG_7 this fixes some start problems for some programs
  from the ports. It is also more correct, as a jail shall not expect
  input (interactivity) from the jail-host.

Revert the current behavior of starting jails in the background and
make it optional only for the start of jails (jail_parallell_start=YES
in rc.conf):
 - The stop can not be done in the background, the system needs to wait
   until everything is stopped correctly before it can reboot or power
   down.
 - The start should not be done in parallel by default, this not only
   breaks POLA for people comming from RELENG_x, it may also break a
   dependency chain with other scripts in the jail-host, which need to
   do some stuff after the jails are up and running (e.g. hardlinking
   a mysql socket from one jail into another one).

Discussed on:	freebsd-jails@

1 files changed, 6 insertions, 1 deletions

diff --git a/share/man/man5/rc.conf.5 b/share/man/man5/rc.conf.5
index 96f64d3..ec3f292 100644
--- a/share/man/man5/rc.conf.5
+++ b/share/man/man5/rc.conf.5
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd February 12, 2010
+.Dd March 05, 2010
 .Dt RC.CONF 5
 .Os
 .Sh NAME
@@ -3497,6 +3497,11 @@ indicates that the highest frequency (less power savings) should be used.
 If set to
 .Dq Li NO ,
 any configured jails will not be started.
+.It jail_parallel_start
+.Pq Vt bool
+If set to
+.Dq Li YES
+all configured jails will be started in the background (= in parallel).
 .It Va jail_list
 .Pq Vt str
 A space separated list of names for jails.