FreeBSD/Linux Kernel Cross Reference
sys/tools/mkboot
1 #!/bin/sh
2 #
3 # mkboot 2.0 - make boot floppy, make root device bootable, etc.
4 # Author: Kees J. Bot
5
6 trap 'e=$?; rm -f /tmp/mkb.$$; exit $e' 0 2
7
8 mdec=/usr/mdec # bootstraps
9
10 # Check arguments.
11 case "$#:$1" in
12 1:bootable | 1:hdboot | [12]:fdboot | 1:cdfdboot )
13 action=$1 dev=$2
14 ;;
15 *) echo "Usage: $0 [bootable | hdboot | cdfdboot | fdboot [device]]" >&2
16 exit 1
17 esac
18
19 # Get the device table.
20 . /etc/fstab
21
22 # The real root device may be the RAM disk.
23 realroot=`printroot -r`
24
25 # If it's an initial fstab, pretend root is real root
26 if [ $root = "/dev/ROOT" ]
27 then root=$realroot
28 fi
29
30 case $action in
31 bootable | hdboot)
32 # We need the root device.
33
34 if [ $realroot = $root ]
35 then
36 rootdir=
37 else
38 umount $root 2>/dev/null
39 mount $root /mnt || exit
40 rootdir=/mnt
41 fi
42 esac
43
44 case $action in
45 bootable)
46 # Install the boot monitor on the root device and make it bootable.
47 install -cs -m 644 $mdec/boot $rootdir/boot/boot || exit
48 sync
49 installboot -device $root $mdec/bootblock /boot/boot || exit
50 test $realroot != $root && umount $root
51 ;;
52 hdboot)
53 # Install a new image on the root device.
54 if [ ! -d $rootdir/boot/image ]
55 then
56 /boot/image is not yet a directory! Fix it.
57 su root -c \
58 "exec mv $rootdir/boot/image /M"
59 install -d $rootdir/boot/image
60 su root -c \
61 "exec mv $rootdir/M $rootdir/boot/image/`uname -r`.`uname -v`"
62 fi
63
64 sh tell_config OS_RELEASE . OS_VERSION >/tmp/mkb.$$
65 version=`sed 's/[" ]//g;/^$/d' </tmp/mkb.$$`
66
67 revision=`cat revision 2>/dev/null`
68 oldrev=$revision
69 target="${version}r${revision}"
70
71 if [ -z "$revision" ]
72 then
73 revision=0
74 elif [ -f $rootdir/boot/image/$target ]
75 then
76 if [ $rootdir/boot/image/$target -newer image ]
77 then
78 echo "$root:/boot/image/$target is up to date"
79 test $realroot != $root && umount $root
80 exit 0
81 fi
82 revision=`expr $revision + 1`
83 fi
84 target="${version}r${revision}"
85
86 set -- `ls -t $rootdir/boot/image`
87
88 case $# in
89 0|1|2|3)
90 # Not much there, do not remove a thing.
91 ;;
92 *)
93 # Remove the third-newest image in /boot/image, but
94 # only if there's an older one (which is kept).
95 echo "rm $root:/boot/image/$3"
96 rm -f "$rootdir/boot/image/$3"
97 esac
98
99 # Install the new image.
100 echo "install image $root:/boot/image/$target"
101 install -o root -m 600 image $rootdir/boot/image/$target || exit
102
103 # Save the revision number.
104 test "$revision" != "$oldrev" && echo $revision >revision
105
106 test $realroot != $root && umount $root
107 echo "Done."
108 ;;
109 fdboot)
110 # fdboot: Make a boot floppy.
111
112 if [ -z "$dev" ]
113 then
114 echo -n \
115 "Finish the name of the floppy device to write (by default 'fd0'): /dev/";
116 read dev
117 case "$dev" in
118 '') dev=/dev/fd0
119 ;;
120 /dev/*)
121 ;;
122 *) dev=/dev/$dev
123 esac
124 fi
125
126 # Make a file system.
127 umount $dev 2>/dev/null
128 if mkfs -B 1024 -i 512 $dev
129 then :
130 else
131 echo "mkfs of $dev failed."
132 exit 1;
133 fi
134
135 # Install /dev, /boot/boot and /boot/image.
136 mount $dev /mnt || exit
137 mkdir -p /mnt/boot/image || exit
138 cpdir /dev /mnt/dev || exit
139 cp -p $mdec/boot /mnt/boot/boot || exit
140 cp -p image /mnt/boot/image/ || exit
141 umount $dev || exit
142
143 # Make bootable and copy the boot parameters.
144 installboot -d $dev $mdec/bootblock /boot/boot || exit
145 pfile=fdbootparams
146 if [ -f $pfile ]
147 then echo "Using floppy boot parameters from file $pfile."
148 edparams $dev "`cat $pfile`" || exit
149 else echo "Copying floppy boot parameters from $root."
150 dd if=$root of=$dev skip=1 seek=1 count=1 conv=silent || exit
151 fi
152 edparams $dev 'main(){delay 2000;boot}; save' || exit
153 echo "Test kernel installed on $dev"
154 ;;
155
156 cdfdboot)
157 # cdfdboot: Make a boot floppy image to go on a CD for booting from.
158 dev=/dev/ram
159 umount $dev 2>/dev/null
160 if mkfs -B 1024 -b 1440 -i 512 $dev || exit 1
161 then :
162 else
163 echo "mkfs of $dev failed."
164 exit 1;
165 fi
166
167 # Install /dev, /boot
168 mount $dev /mnt || exit 1
169 mkdir /mnt/dev
170 mkdir /mnt/boot
171 mkdir /mnt/boot/image
172 ( cd /mnt/dev && /usr/src/commands/scripts/MAKEDEV.sh std )
173 cp -p image image_* /mnt/boot/image || exit 1
174 cp -p ../boot/boot /mnt/boot/boot || exit 1
175 umount $dev || exit 1
176 installboot -d $dev ../boot/bootblock boot/boot || exit 1
177 edparams $dev 'unset bootopts; unset servers; disable=inet; image=/boot/image/image_big; bootbig(1, Regular MINIX 3 (requires at least 16 MB RAM)) { image=/boot/image/image ; boot } bootsmall(2, Small MINIX 3 (intended for 8 MB systems)) { image=/boot/image/image_small ; boot } cdproberoot=1; unset rootdev; unset leader; leader() { echo \n--- Welcome to MINIX 3. This is the boot monitor. ---\n\nChoose an option from the menu or press ESC if you need to do anything special.\nOtherwise I will boot with my defaults in 10 seconds.\n\n }; bootcd=1; main(){trap 10000 boot; menu; }; save' || exit
178
179 # copy image
180 dd if=$dev of=cdfdimage bs=8192 count=180
181 esac
182 sync
183 exit 0
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