mkimage revision 1.1
1 #! /bin/sh 2 3 # $NetBSD: mkimage,v 1.1 2012/01/15 02:01:02 agc Exp $ 4 5 # Copyright (c) 2012 Alistair Crooks <agc (at] NetBSD.org> 6 # All rights reserved. 7 # 8 # Redistribution and use in source and binary forms, with or without 9 # modification, are permitted provided that the following conditions 10 # are met: 11 # 1. Redistributions of source code must retain the above copyright 12 # notice, this list of conditions and the following disclaimer. 13 # 2. Redistributions in binary form must reproduce the above copyright 14 # notice, this list of conditions and the following disclaimer in the 15 # documentation and/or other materials provided with the distribution. 16 # 17 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 18 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 19 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 20 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 21 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 22 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 26 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 # 28 29 # find next available vnd, from kre 30 next_avail () 31 { 32 local dev="$1" 33 local N=$(( ${#dev} + 1 )) 34 local unit units 35 36 units=$( 37 sysctl -n hw.disknames | 38 tr ' ' '\012' | 39 grep '^'"${dev}"'[0-9]' | 40 sort -n -k 1.$N ) 41 42 test -z "${units}" && { 43 test -e "/dev/${dev}0a" || { 44 echo >&2 "No ${dev}s available!" 45 return 1 46 } 47 echo "${dev}0" 48 return 49 } 50 51 N=0 52 for unit in ${units} 53 do 54 if [ "${unit}" = "${dev}${N}" ] 55 then 56 N=$(( N + 1 )) 57 else 58 echo "${dev}${N}" 59 return 60 fi 61 done 62 63 test -e /dev/"${dev}${N}a" || { 64 echo >&2 "All ${dev}s in use" 65 return 1 66 } 67 68 echo "${dev}${N}" 69 } 70 71 # find the size of the gzipped files in a .tgz archive 72 sizeone() { 73 case "$1" in 74 *.tgz|*.tar.gz) 75 tar tvzf "$1" | awk '{ tot += $5 } END { print tot }' 76 ;; 77 *.tbz|*.tar.bz2) 78 tar tvjf "$1" | awk '{ tot += $5 } END { print tot }' 79 ;; 80 *) 81 echo 0 82 ;; 83 esac 84 } 85 86 setsdir=/usr/build/release/i386/binary/sets 87 size=0 # in MB 88 overhead=8 # in MB 89 image=usermode.img 90 h=usermode1.$(uname -n) 91 sets="base etc modules" 92 usermodedirs="/var.run /var.log /etc.cow /root.cow /pkgs" 93 specialdirs="/kern /proc" 94 bar="===" 95 96 while [ $# -gt 0 ]; do 97 case "$1" in 98 -S) setsdir=$2; shift ;; 99 -h) h=$2; shift ;; 100 -s) size=$2; shift ;; 101 -x) set -x ;; 102 *) break ;; 103 esac 104 shift 105 done 106 107 if [ $# -gt 0 ]; then 108 # take the next argument as being the image name 109 image="$1" 110 shift 111 fi 112 113 total=0 114 for s in ${sets}; do 115 total=$(expr ${total} + $(sizeone ${setsdir}/${s}.tgz)) 116 done 117 total=$(expr \( ${total} / 1000000 \) + ${overhead}) 118 if [ $size -eq 0 ]; then 119 # auto-size the pkgs fs 120 size=${total} 121 else 122 # check that we've been given enough space 123 if [ ${total} -gt ${size} ]; then 124 echo "File system size given as ${size} MB, but it needs ${total} MB" >&2 125 exit 1 126 fi 127 fi 128 129 echo "${bar} making a new ${size} MB image in ${image} ${bar}" 130 dd if=/dev/zero of=${image} bs=1m count=${size} 131 132 vnddev=$(next_avail vnd) 133 echo "${bar} mounting image via vnd ${vnddev} ${bar}" 134 sudo vnconfig ${vnddev} ${image} 135 sudo newfs /dev/r${vnddev}a 136 sudo mount /dev/${vnddev}a /mnt 137 138 echo "${bar} installing sets ${bar}" 139 (cd /mnt && 140 for s in ${sets}; do 141 echo ${s} 142 sudo tar xpzf ${setsdir}/${s}.tgz 143 done 144 ) 145 146 echo "${bar} performing customisations ${bar}" 147 sudo rm -f /mnt/etc/motd 148 149 tmp=/tmp/usermode.$$ 150 cat > ${tmp} << EOF 151 # NetBSD/usermode /etc/fstab 152 /dev/ld0a / ffs ro 1 1 153 /dev/ld1a /pkgs ffs ro 1 2 154 kernfs /kern kernfs rw 155 ptyfs /dev/pts ptyfs rw 156 procfs /proc procfs rw 157 # mount /root as tmpfs on top of existing dir 158 tmpfs /root.cow tmpfs rw,-s2M 0 0 159 /root.cow /root union rw,hidden 0 0 160 # mount /etc as tmpfs on top of existing dir 161 tmpfs /etc.cow tmpfs rw,-s12M 0 0 162 /etc.cow /etc union rw,hidden 0 0 163 # mount /var/run as tmpfs on top of existing dir 164 tmpfs /var.run tmpfs rw,-s1M 0 0 165 /var.run /var/run union rw,hidden - - 166 # mount /var/log as tmpfs on top of existing dir 167 tmpfs /var.log tmpfs rw,-s10M 0 0 168 /var.log /var/log union rw,hidden - - 169 tmpfs /var/db tmpfs rw,-s8M 0 0 170 tmpfs /tmp tmpfs rw,-s32M 0 0 171 /dev/cd0a /cdrom cd9660 ro,noauto 172 EOF 173 sudo mv ${tmp} /mnt/etc/fstab 174 175 cat > ${tmp} << EOF 176 # $NetBSD: mkimage,v 1.1 2012/01/15 02:01:02 agc Exp $ 177 # 178 # see rc.conf(5) for more information. 179 # 180 # Use program=YES to enable program, NO to disable it. program_flags are 181 # passed to the program on the command line. 182 # 183 184 # Load the defaults in from /etc/defaults/rc.conf (if it's readable). 185 # These can be overridden below. 186 # 187 if [ -r /etc/defaults/rc.conf ]; then 188 . /etc/defaults/rc.conf 189 fi 190 191 # If this is not set to YES, the system will drop into single-user mode. 192 # 193 rc_configured=YES 194 195 # make sure we have the right rw filesystem at boot 196 critical_filesystems_local="/var/db /var.run /var/run /var.log /var/log /etc.cow /etc /root.cow /root" 197 198 # Add local overrides below 199 # 200 dhcpcd=YES 201 sshd=YES 202 203 hostname=${h} 204 EOF 205 sudo mv ${tmp} /mnt/etc/rc.conf 206 207 echo "${bar} making extra directories ${bar}" 208 for d in ${usermodedirs}; do 209 sudo mkdir -p /mnt/${d} 210 done 211 for d in ${specialdirs}; do 212 sudo mkdir -p /mnt/${d} 213 done 214 215 echo "${bar} customising /var/tmp ${bar}" 216 sudo rm -rf /mnt/var/tmp 217 (cd /mnt/var && sudo ln -s /tmp tmp) 218 219 # package-related stuff 220 (cat /mnt/etc/csh.cshrc;echo "setenv PKG_DBDIR /usr/pkg/.dbdir") > ${tmp} 221 sudo mv ${tmp} /mnt/etc/csh.cshrc 222 (cat /mnt/etc/profile;echo "export PKG_DBDIR=/usr/pkg/.dbdir") > ${tmp} 223 sudo mv ${tmp} /mnt/etc/profile 224 (echo "PKG_DBDIR=/usr/pkg/.dbdir") > ${tmp} 225 sudo mv ${tmp} /mnt/etc/mk.conf 226 (cd /mnt/usr && sudo ln -s /pkgs/usr/pkg pkg) 227 228 df /mnt 229 230 sudo umount /mnt 231 sudo vnconfig -u ${vnddev} 232 233 exit 0 234
Indexes created Tue Sep 30 20:09:53 GMT 2025