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 #   $3 = (optional) bytes-per-inode
  49 mount_md() {
  50         if [ -n "$3" ]; then
  51                 bpi="-i $3"
  52         fi
  53         /sbin/mount_mfs $bpi -s $1 swap $2
  54 }
  55
  56 # If there is a global system configuration file, suck it in.
  57 #
  58 if [ -r /etc/rc.subr ]; then
  59         . /etc/rc.subr
  60         load_rc_config $name
  61 elif [ -r /etc/defaults/rc.conf ]; then
  62         . /etc/defaults/rc.conf
  63         source_rc_confs
  64 elif [ -r /etc/rc.conf ]; then
  65         . /etc/rc.conf
  66 fi
  67
  68 # If we do not have a writable /var, create a memory
  69 # filesystem for /var.  We don't have /usr yet so
  70 # use mkdir instead of touch to test.  We want mount
  71 # to record its mounts so we have to make sure /var/db
  72 # exists before doing the mount -a.
  73 #
  74 if (/bin/mkdir /var/.diskless 2> /dev/null); then
  75         rmdir /var/.diskless
  76 else
  77         echo "+++ mount_md of /var"
  78         mount_md ${varsize:=32768} /var
  79 fi
  80
  81 if [ ! -d /var/db ]; then
  82         mkdir /var/db
  83 fi
  84
  85 # Now we need the rest of our mounts, particularly /usr
  86 #
  87 mount -a       # chown and chgrp are in /usr
  88
  89 # Populate /var
  90 #
  91 echo "+++ populate /var using /etc/mtree/BSD.var.dist"
  92 /usr/sbin/mtree -deU -f /etc/mtree/BSD.var.dist -p /var > /dev/null
  93 case ${sendmail_enable} in
  94 [Nn][Oo][Nn][Ee])
  95         ;;
  96 *)
  97         /usr/sbin/mtree -deU -f /etc/mtree/BSD.sendmail.dist -p / > /dev/null
  98         ;;
  99 esac
 100
 101 echo "+++ create log files based on the contents of /etc/newsyslog.conf"
 102 LOGFILES=`/usr/bin/awk '$1 != "#" { printf "%s ", $1 } ' /etc/newsyslog.conf`
 103 if [ -n "$LOGFILES" ]; then
 104         /usr/bin/touch $LOGFILES
 105 fi
 106
 107 echo "+++ create lastlog"
 108 /usr/bin/touch /var/log/lastlog
 109
 110 # XXX make sure to create one dir for each printer as requested by lpd
 111 #
 112 # If we do not have a writable /tmp, create a memory
 113 # filesystem for /tmp.  If /tmp is a symlink (e.g. to /var/tmp,
 114 # then it should already be writable).
 115 #
 116 if (/bin/mkdir /tmp/.diskless 2> /dev/null); then
 117         rmdir /tmp/.diskless
 118 else
 119         if [ -h /tmp ]; then
 120                 echo "*** /tmp is a symlink to a non-writable area!"
 121                 echo "dropping into shell, ^D to continue anyway."
 122                 /bin/sh
 123         else
 124                 mount_md ${tmpsize:=20480} /tmp
 125                 chmod 01777 /tmp
 126         fi
 127 fi
 128
 129 if sysctl vfs.devfs > /dev/null 2>&1 ; then
 130         # we have DEVFS, no worries...
 131         true
 132 elif (/bin/mkdir /dev/.diskless 2> /dev/null); then
 133         # if /dev is writable assume it has already been populated
 134         # via rc.d/diskless
 135         #
 136         rmdir /dev/.diskless
 137 else
 138         (cd /; find -x dev | cpio -o -H newc) > /tmp/dev.tmp
 139         mount_md 4096 /dev 512
 140         (cd /; cpio -i -H newc -d < /tmp/dev.tmp)
 141         rm -f /tmp/dev.tmp
 142 fi
 143
 144 # generate our hostname
 145 #
 146 if [ -z "`hostname -s`" ]; then
 147         hostname=`/usr/bin/kenv dhcp.host-name`
 148         hostname $hostname
 149         echo "Hostname is $hostname"
 150 fi
 151
 152 # if the info is available via dhcp/kenv
 153 # build the resolv.conf
 154 #
 155 if [ ! -e /etc/resolv.conf ]; then
 156         echo domain `/usr/bin/kenv dhcp.domain-name` > /etc/resolv.conf
 157
 158         set `/usr/bin/kenv dhcp.domain-name-servers`
 159         for ns in `IFS=','; echo $*`; do
 160                 echo nameserver $ns >> /etc/resolv.conf;
 161         done
 162 fi