rc.diskless1/initdiskless change for review
From: Brooks Davis (brooks_at_one-eyed-alien.net)
Date: 05/27/03
- Previous message: Ashish Kulkarni: "Re: [PATCH] changing the ToS in IP Header"
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Date: Tue, 27 May 2003 13:54:02 -0700 To: hackers@freebsd.org
The following patch (against rc.diskless1 on STABLE, but the code is
identical in rc.d/initdiskless) simplifies the likely common case for
remounts in the /conf hierarchy. It allows you to specify a path (i.e.
/etc) in the diskless_remount file rather then having to record the path
to the NFS root. I'm using this to allow me to copy a the entire root
to a new location on my NFS server to do an upgrade without breaking
running hosts on the old root and without touching /conf at all.
I'd like to commit this after the tree is thawed again. What do people
think?
-- Brooks
Index: rc.diskless1
===================================================================
RCS file: /usr/cvs/src/etc/Attic/rc.diskless1,v
retrieving revision 1.5.2.11
diff -u -r1.5.2.11 rc.diskless1
--- rc.diskless1 14 Apr 2003 18:12:05 -0000 1.5.2.11
+++ rc.diskless1 24 May 2003 00:33:19 -0000
@@ -121,6 +121,17 @@
done
echo "Interface ${bootp_ifc} IP-Address ${bootp_ipa} Broadcast ${bootp_ipbca}"
+# Figure out our NFS root path
+#
+set `mount -t nfs`
+while [ $# -ge 1 ] ; do
+ if [ "$2" = "on" -a "$3" = "/" ]; then
+ nfsroot="$1"
+ break
+ fi
+ shift
+done
+
# Resolve templates in /conf/base, /conf/default, /conf/${bootp_ipbca},
# and /conf/${bootp_ipa}. For each subdirectory found within these
# directories:
@@ -136,6 +147,10 @@
# might contain 'myserver:/etc'. NFS remounts allow you to avoid
# having to dup your system directories in /conf. Your server must
# be sure to export those filesystems -alldirs, however.
+# If the diskless_remount file contains a string beginning with a
+# '/' it is assumed that the local nfsroot should be prepended to
+# it before attemping to mount allowing the root to be relocated
+# without needing to change the remount files.
#
for i in base default ${bootp_ipbca} ${bootp_ipa} ; do
for j in /conf/$i/* ; do
@@ -150,6 +165,9 @@
#
if [ -d $j -a -f $j/diskless_remount ]; then
nfspt=`/bin/cat $j/diskless_remount`
+ if [ `expr "$nfspt" : '\(.\)'` = "/" ]; then
+ nfspt="${nfsroot}${nfspt}"
+ fi
mount_nfs $nfspt $j
chkerr $? "mount_nfs $nfspt $j"
fi
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