[src/trunk]: src/distrib/vax/cdroms/installcd If mounting the various tmpfs i...

[martin <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/ef9de54a5dad
branches:  trunk
changeset: 329409:ef9de54a5dad
user:      martin <martin%NetBSD.org@localhost>
date:      Fri May 23 12:25:46 2014 +0000

description:
If mounting the various tmpfs instances fails, we do not have enough
RAM installed. Tell the user about it and exec a single user shell
(instead of randomly failing later and hanging the machine.)

diffstat:

 distrib/vax/cdroms/installcd/etc.rc |  20 ++++++++++++++++----
 1 files changed, 16 insertions(+), 4 deletions(-)

diffs (35 lines):

diff -r 67637c6bfd33 -r ef9de54a5dad distrib/vax/cdroms/installcd/etc.rc
--- a/distrib/vax/cdroms/installcd/etc.rc       Fri May 23 11:48:26 2014 +0000
+++ b/distrib/vax/cdroms/installcd/etc.rc       Fri May 23 12:25:46 2014 +0000
@@ -1,4 +1,4 @@
-# $NetBSD: etc.rc,v 1.1 2014/05/21 14:21:35 martin Exp $
+# $NetBSD: etc.rc,v 1.2 2014/05/23 12:25:46 martin Exp $
 #
 # Copyright (c) 1997 Perry E. Metzger
 # Copyright (c) 1994 Christopher G. Demetriou
@@ -39,10 +39,22 @@
 # hack to get around bugs in kernfs's rootdev/rrootdev lookup.
 ls -l /dev/* > /dev/null 2>&1
 
+lowmemfail()
+{
+       cat << "EOM"
+This machine seems to not have enough memory for this install method.
+Please refer to the installation documentation on how to create and
+boot a custom kernel and how to install with that.
+
+Please use the 'halt' command to stop the machine.
+EOM
+       exec sh
+}
+
 # mount a few tempfs to allow modifications over the CD contents
-mount -t tmpfs tmpfs /tmp
-mount -t tmpfs tmpfs /var
-mount -t tmpfs -o union tmpfs /etc
+mount -t tmpfs tmpfs /tmp || lowmemfail
+mount -t tmpfs tmpfs /var || lowmemfail
+mount -t tmpfs -o union tmpfs /etc || lowmemfail
 
 # prepare important directories in the tmpfses, so dhcpcd and vi will work
 mkdir -p /var/run /var/db /var/tmp