3cc4938297
the null mount, we currently create a temporary mfs on /tmp, copy
/etc to /tmp, then mount /etc as mfs and copy everything back from
/tmp, then delete the /tmp mfs.
The patch eliminates the temporary /tmp mfs and the subsequent
copying and simply populates the /etc mfs by copying from
/conf/default/etc. This requires that /conf/default/etc contain a
complete copy of all the /etc stuff instead of just overrides. I
don't think that is too much of an extra step in setting up a
diskless environment.
* Provide the ability to make /tmp a memory filesystem independent
of /var. This removes the requirement that /tmp be a symlink to
/var/tmp and this makes the diskless code work with the default
filesystem layout. If a seperate /tmp memory filesystem is
created, the 'tmpsize' environment variable is used to determine
its size (default to 10 Meg).
* Reduce diffs between the -current and -stable versions of these
files to a bare minimum. Only the definition of the shell
function 'mount_md' is different.
Not Objected to by: -arch@, -small@
MFC after: 2 days
96 lines
3.0 KiB
Bash
96 lines
3.0 KiB
Bash
#!/bin/sh
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#
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# Copyright (c) 1999 Matt Dillon
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# $FreeBSD$
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#
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# $FreeBSD$
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#
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# PROVIDE: diskless
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# REQUIRE: initdiskless mountcritlocal
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# BEFORE: addswap random
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# KEYWORD: FreeBSD
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dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null`
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[ ${dlv:=0} -eq 0 ] && exit 0
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name="diskless2"
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# Provide a function for normalizing the mounting of memory
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# filesystems. This should allow the rest of the code here to remain
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# as close as possible between 5-current and 4-stable.
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# $1 = size
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# $2 = mount point
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# $3 = md unit number (ignored in pre 5.0 systems)
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# $4 = (optional) bytes-per-inode
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mount_md()
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{
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if [ -n "$4" ]; then
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bpi="-i $4"
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fi
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/sbin/mdconfig -a -t malloc -s $1 -u $3
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/sbin/disklabel -r -w md$3 auto
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/sbin/newfs $bpi /dev/md$3c
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/sbin/mount /dev/md$3c $2
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}
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echo "+++ mfs_mount of /var"
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mount_md ${varsize:=65536} /var 1
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if [ -r /etc/rc.subr ]; then
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. /etc/rc.subr
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load_rc_config $name
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echo "+++ mount_md of /var"
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mount_md ${varsize:=32m} /var 1
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echo "+++ populate /var using /etc/mtree/BSD.var.dist"
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/usr/sbin/mtree -deU -f /etc/mtree/BSD.var.dist -p /var
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case ${sendmail_enable} in
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/usr/bin/touch $LOGFILES
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fi
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# Since we are starting with a very fresh /etc on an MFS:
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if [ -d /conf/default/etc ]; then
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newaliases
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fi
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#
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# /var/tmp, otherwise, use a small memory filesystem for /tmp.
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mount_md ${tmpsize:=20480} /tmp 2
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# so if /var/tmp == /tmp, then you don't get a vi.recover.
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#
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if [ ! -h /tmp ]; then
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mount_md ${tmpsize:=64m} /tmp 2
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chmod 01777 /tmp
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fi
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if sysctl vfs.devfs.generation > /dev/null 2>&1 ; then
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# we have DEVFS, no worries...
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true
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else
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# extract a list of device entries, then copy them to a writable fs
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(cd /; find -x dev | cpio -o -H newc) > /tmp/dev.tmp
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mount_md 4096 /dev 3 512
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(cd /; cpio -i -H newc -d < /tmp/dev.tmp)
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fi
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