etc/rc.d/diskless

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 1999  Matt Dillon
   4 # All rights reserved.
   5 #
   6 # Redistribution and use in source and binary forms, with or without
   7 # modification, are permitted provided that the following conditions
   8 # are met:
   9 # 1. Redistributions of source code must retain the above copyright
  10 #    notice, this list of conditions and the following disclaimer.
  11 # 2. Redistributions in binary form must reproduce the above copyright
  12 #    notice, this list of conditions and the following disclaimer in the
  13 #    documentation and/or other materials provided with the distribution.
  14 #
  15 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  16 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  17 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  18 # ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  19 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  20 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  21 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  22 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  23 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  24 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  25 # SUCH DAMAGE.
  26 #
  27 # $FreeBSD: src/etc/rc.d/diskless,v 1.25 2003/02/15 16:34:14 jhay Exp $
  28 # $DragonFly: src/etc/rc.d/diskless,v 1.7 2007/05/13 22:25:41 swildner Exp $
  29 #
  30
  31 # PROVIDE: diskless
  32 # REQUIRE: initdiskless rcconf mountcritlocal
  33 # BEFORE: addswap random
  34
  35 if [ -r /etc/rc.subr ]; then
  36     . /etc/rc.subr
  37     dummy_rc_command "$1"
  38 fi
  39
  40 dlv=`/sbin/sysctl -n vfs.nfs.diskless_valid 2> /dev/null`
  41 [ ${dlv:=0} -eq 0 ] && exit 0
  42
  43 name="diskless"
  44
  45 # Provide a function for normalizing the mounting of memory filesystems.
  46 #   $1 = size
  47 #   $2 = mount point
  48 mount_md() {
  49         /sbin/mount_tmpfs -s $1 tmpfs $2
  50 }
  51
  52 # If there is a global system configuration file, suck it in.
  53 #
  54 if [ -r /etc/rc.subr ]; then
  55         . /etc/rc.subr
  56         load_rc_config $name
  57 elif [ -r /etc/defaults/rc.conf ]; then
  58         . /etc/defaults/rc.conf
  59         source_rc_confs
  60 elif [ -r /etc/rc.conf ]; then
  61         . /etc/rc.conf
  62 fi
  63
  64 # Try to mount root r/w.  If a workable /etc/fstab is present
  65 # this may give us a RW mount.
  66 #
  67 mount -u /
  68
  69 if (echo "" | dd of=/var/.diskless 2> /dev/null); then
  70         echo "diskless: /var is writable"
  71 else
  72         echo "+++ mount_md of /var"
  73         mount_md ${varsize:=16M} /var
  74 fi
  75
  76 if [ ! -d /var/db ]; then
  77         mkdir /var/db
  78 fi
  79
  80 # Now we need the rest of our mounts, particularly /usr
  81 #
  82 mount -a       # chown and chgrp are in /usr
  83
  84 # Populate /var
  85 #
  86 echo "+++ populate /var using /etc/mtree/BSD.var.dist"
  87 /usr/sbin/mtree -deU -f /etc/mtree/BSD.var.dist -p /var > /dev/null
  88 case ${sendmail_enable} in
  89 [Nn][Oo][Nn][Ee])
  90         ;;
  91 *)
  92         /usr/sbin/mtree -deU -f /etc/mtree/BSD.sendmail.dist -p / > /dev/null
  93         ;;
  94 esac
  95
  96 echo "+++ create log files based on the contents of /etc/newsyslog.conf"
  97 LOGFILES=`/usr/bin/awk '$1 != "#" { printf "%s ", $1 } ' /etc/newsyslog.conf`
  98 if [ -n "$LOGFILES" ]; then
  99         /usr/bin/touch $LOGFILES
 100 fi
 101
 102 echo "+++ create lastlog"
 103 /usr/bin/touch /var/log/lastlog
 104
 105 # XXX make sure to create one dir for each printer as requested by lpd
 106 #
 107 # If we do not have a writable /tmp, create a memory
 108 # filesystem for /tmp.  If /tmp is a symlink (e.g. to /var/tmp,
 109 # then it should already be writable).
 110 #
 111 if (echo "" | dd of=/tmp/.diskless 2> /dev/null); then
 112         echo "diskless: /tmp is writable"
 113 else
 114         if [ -h /tmp ]; then
 115                 echo "*** /tmp is a symlink to a non-writable area!"
 116                 echo "dropping into shell, ^D to continue anyway."
 117                 /bin/sh
 118         else
 119                 mount_md ${tmpsize:=10M} /tmp
 120                 chmod 01777 /tmp
 121         fi
 122 fi
 123
 124 # generate our hostname
 125 #
 126 if [ -z "`hostname -s`" ]; then
 127         hostname=`/usr/bin/kenv dhcp.host-name`
 128         hostname $hostname
 129         echo "Hostname is $hostname"
 130 fi
 131
 132 # if the info is available via dhcp/kenv
 133 # build the resolv.conf
 134 #
 135 if [ ! -e /etc/resolv.conf ]; then
 136         echo domain `/usr/bin/kenv dhcp.domain-name` > /etc/resolv.conf
 137
 138         set `/usr/bin/kenv dhcp.domain-name-servers`
 139         for ns in `IFS=','; echo $*`; do
 140                 echo nameserver $ns >> /etc/resolv.conf;
 141         done
 142 fi