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Linux 起動用initスクリプトver.9

Linux 起動用initスクリプトver.8で、メッセージの表示を分かり易くした”つもり”のものです。

使用方法は、ハードディスクにインストールしたUbuntu10.04で

1)Synapticパッケージマネージャでkexec-toolsをインストール。

2)端末で以下を実行。
~$ mkdir init
~$ cd init
~/init$ gzip -dc /boot/initrd.img-$(uname -r) | cpio -i
~/init$ cp -p /sbin/kexec sbin/
~/init$ mkdir -p lib/tls/i686/cmov
~/init$ cp -p /lib/tls/i686/cmov/libc.so.6 lib/tls/i686/cmov/
~/init$ cp /usr/bin/file bin/
~/init$ cp -p -L /usr/lib/libmagic.so.1 lib/
~/init$ cp -p -L /lib/libz.so.1 lib/
~/init$ cp -p /usr/share/file/magic* etc/
~/init$ mkdir usr/share/misc -p
~/init$ ln -s misc usr/share/file
~/init$ ln -s ../../../etc/magic usr/share/misc/magic
~/init$ ln -s ../../../etc/magic.mgc usr/share/misc/magic.mgc
~/init$ ln -s ../../../etc/magic.mime usr/share/misc/magic.mime
~/init$ gedit ./displaymessage

3)開いたテキストエディタで、以下の横線で囲まれたものを貼り付けます。「#!/bin/sh」が1行目になるようにしてください。保存してテキストエディタを終了。


#!/bin/sh
while [ a = a ]
do
printf "\n\033[7;31mYou can look upper by pushing SHIFT and PageUp keys at the same time\033[0m\n"
sleep 15
done


4)端末で
~/init$ gedit ./init

5)開いたテキストエディタで、その内容を以下の横線で囲まれたものに置き換えます。保存してテキストエディタを終了。

6)端末で
~/init$ find .|cpio -H newc -o|gzip -9 > ../initrd.img-kiyo

7) 使用中のカーネルのバージョンを調べます。端末で
$ uname -r

8) 使用中のカーネル(/boot/vmlinuz-??.??.??-??-generic)と~/initrd.img-kiyo(上記の作業で改変した initrd.img。「ホーム・フォルダ」にあります)を、起動時に認識できるパーティションにコピーして、それをカーネルローダー(grub4dos など)で読み込むように設定すれば良いです。grub4dosの設定方法については
Ubuntu Tips/・・・/grub4dos を利用する
でもご覧ください。

9)実際に再起動して、8)で設定したように起動すれば良いです。

<2010/10/21追記>
disklessfunさんのminimum ubuntuでも動作するように、A-zをa-zA-Zに変更しました。
<2010/10/21追記はここまで>

置き換えるべきinitの内容は以下の横線で囲まれた範囲です。「#!/bin/sh」が1行目になるようにしてください。


#!/bin/sh

[ -d /dev ] || mkdir -m 0755 /dev
[ -d /root ] || mkdir -m 0700 /root
[ -d /sys ] || mkdir /sys
[ -d /proc ] || mkdir /proc
[ -d /tmp ] || mkdir /tmp
mkdir -p /var/lock
mount -t sysfs -o nodev,noexec,nosuid none /sys
mount -t proc -o nodev,noexec,nosuid none /proc

grep -q '\<quiet\>' /proc/cmdline || echo "Loading, please wait..."

# Note that this only becomes /dev on the real filesystem if udev's scripts
# are used; which they will be, but it's worth pointing out
if ! mount -t devtmpfs -o mode=0755 none /dev; then
mount -t tmpfs -o mode=0755 none /dev
mknod -m 0600 /dev/console c 5 1
mknod /dev/null c 1 3
fi
mkdir /dev/pts
mount -t devpts -o noexec,nosuid,gid=5,mode=0620 none /dev/pts || true
> /dev/.initramfs-tools
mkdir /dev/.initramfs

# Export the dpkg architecture
export DPKG_ARCH=
. /conf/arch.conf

# Set modprobe env
export MODPROBE_OPTIONS="-qb"

# Export relevant variables
export ROOT=
export ROOTDELAY=
export ROOTFLAGS=
export ROOTFSTYPE=
export IPOPTS=
export HWADDR=
export break=
export init=/sbin/init
export quiet=n
export readonly=y
export rootmnt=/root
export debug=
export panic=
export blacklist=
export resume_offset=

# Bring in the main config
. /conf/initramfs.conf
. /scripts/functions

if [ -z "${noresume}" ]; then
export resume=${RESUME}
else
export noresume
fi

[ -n "${netconsole}" ] && modprobe netconsole netconsole=${netconsole}

# export BOOT variable value for compcache,
# so we know if we run from casper
export BOOT

# Don't do log messages here to avoid confusing usplash
run_scripts /scripts/init-top

log_begin_msg "Loading essential drivers..."
load_modules
log_end_msg

[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/init-premount"
run_scripts /scripts/init-premount
[ "$quiet" != "y" ] && log_end_msg

[ -d /mnt ] || mkdir -m 0755 /mnt
rd () {
printf "\033[31m"
}
green () {
printf "\033[32m"
}
reverse () {
printf "\033[7m"
}
black () {
printf "\033[0m"
}
redr () {
printf "\033[7;31m"
}
greenr () {
printf "\033[7;32m"
}
recho () {
printf "\033[31m$*\n\033[0m"
}
gecho () {
printf "\033[32m$*\n\033[0m"
}
rdecho () {
printf "\033[7;31m$*\n\033[0m"
}
grecho () {
printf "\033[7;32m$*\n\033[0m"
}
sh /displaymessage &
grecho ==========================
grecho "Please wait until all the device you want to boot is recognized and then push ENTER key."
grecho ==========================
read -s a
reverse
echo $a
black
deviceslist=$(blkid|cut -d: -f1)
okdeviceslist=""
for a in $deviceslist
do
umount -l /mnt 2>/dev/null
mount -t $(blkid $a|sed -e "s/.*TYPE=\"//"|sed -e "s/\".*//") $a /mnt 2>/dev/null || continue
okdeviceslist="${okdeviceslist} $a"
umount -l /mnt 2>/dev/null
done
i=0
grecho ==========================
grecho "The device file names and information of partitions will be recognized and are shown below."
echo
for a in ${okdeviceslist}
do
reverse
echo $i":"$(blkid|grep "${a}:")
black
i=$(expr $i + 1)
done
echo
rdecho "You can look upper by pushing SHIFT and PageUp keys at the same time."
grecho "Please type the number of the device file name of the root partition of Ubuntu you want to boot."
panipani () {
rdecho "DAMESSU! I will try to make you use terminal"
PS1='(kiyoChelp) ' /bin/sh -i </dev/console >/dev/console 2>&1
rdecho "Please reboot by pressing CTRL+ALT+DEL or ATL+SysRq+R,S,E,I,U,B"
exec run-init ${rootmnt} ${init} "$@" <${rootmnt}/dev/console >${rootmnt}/dev/console 2>&1
panic "Could not execute run-init."
}
readloop () {
while [ a = a ]
do
read -s a
reverse
echo $a
black
if [ $a -ge 0 ]
then
if [ $? = 1 ]
then
rdecho "Please type number"
continue
elif [ $a -lt "$(echo $*|tr ' ' '\n'|wc -l)" ]
then
break
else
rdecho "Please type number smaller than $(echo $*|tr ' ' '\n'|wc -l)"
continue
fi
rdecho "Please type number larger than 0 or 0"
fi
done
}
checkelf () {
if [ "a$(file $1|grep -i ELF)" = "a" ]
then
elfarg=""
else
elfarg=" --args-linux "
fi
}
readloop "${okdeviceslist}"
device=$(echo ${okdeviceslist}|cut -d" " -f $(expr $a + 1))
grecho "You selected $a:$device"
mount -t $(blkid $device|sed -e "s/.*TYPE=\"//"|sed -e "s/\".*//") $device /mnt
greenr
echo "If you want to search Grub settings, please type y"
echo "If you want to get into busybox, please type zzz"
read -s aa
reverse
echo $aa
black
if [ -n "$(echo $aa|grep y)" ]
then
fakemore () {
step=$1
num=1
ln=$(wc -l $2 |sed "s/^[^0-9]*//"|sed "s/[^0-9]*$//")
while [ $num -lt $ln ]
do
reverse
sed -n "$num,$(expr $num + $step) p" $2
greenr
echo -n "## Please enter q to quit displaying: "
reverse
read b
black
if [ a"$b" = "aq" ]
then
break
fi
num=$(expr $num + $step + 1)
done
return
}
settingchange () {
while [ a = a ]
do
greenr
echo "kernel is: $kernel"
if [ -z "$(echo $initrd|tr -d " ")" ]
then
echo "initrd line is not set."
else
echo "initrd is: $initrd"
fi
echo "kernel option is: $kernelopts"
redr
echo -n "Do you want to boot with the above settings? (nothing:yes, c:edit settings, any other: quit selecting this menuentry) : "
read -s q
reverse
echo $q
black
if [ "a$q" = "a" -o "a$q" = "ay" -o "a$q" = "ayes" ]
then
checkelf /mnt/$kernel
if [ "a$initrd" = "a" ]
then
kexec -l /mnt${kernel} $elfarg --append="${kernelopts}"
else
kexec -l /mnt${kernel} $elfarg --initrd=/mnt${initrd} --append="${kernelopts}"
fi
kexec -e
sleep 10
panipani
elif [ "a$q" = "ac" ]
then
redr
echo -n "Type the kernel file in full path (nothing:unchanged): "
black
read q
reverse
echo $q
black
if [ "a$q" != "a" ]; then kernel=$q;fi
redr
echo -n "Type the initrd file in full path (nothing:unchanged. to delete, type \"d\"): "
black
read q
reverse
echo $q
black
if [ "a$q" = "ad" ]
then
initrd=""
elif [ "a$q" != "a" ]
then
initrd=$q
fi
redr
echo -n "Type the kernel option (nothing:unchanged): "
black
read q
reverse
echo $q
black
if [ "a$q" != "a" ]; then kernelopts=$q;fi
else
break
fi
done
}
if [ -e /mnt/boot/grub/grub.cfg -o -e /mnt/grub/grub.cfg ]
then
[ -e /mnt/boot/grub/grub.cfg ]&& c="/boot"||c=""
grecho "$c/grub/grub.cfg (GRUB2 settings file)is found."
while [ a = a ]
do
greenr
echo -n "? 1) show $c/grub/grub.cfg, 2) select menuentry, 3)end this function : "
read -s a
reverse
echo $a
black
if [ "$a" = 1 ]
then
fakemore 10 /mnt$c/grub/grub.cfg
elif [ "$a" = 2 ]
then
grep menuentry /mnt$c/grub/grub.cfg | sed -e "s/^[^a-zA-Z0-9#]*menuentry *//" > /tmp/menuentries
i=0
num=$(wc -l /tmp/menuentries|tr -s " "|sed -e "s/ *//"|cut -d" " -f1)
reverse
while [ $i -lt $num ]
do
i=$(expr $i + 1)
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
done
rdecho "You can look upper by pushing SHIFT and PageUp keys at the same time."
grecho "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
grecho "=========================================="
grecho "The contents is:"
echo
num=$(grep -A15 -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt$c/grub/grub.cfg|grep -n ^}|sed -n -e 1p|cut -d: -f1)
if [ -n "$num" ]
then
num=$(expr $num - 1)
else
num=15
fi
grep -A $num -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt$c/grub/grub.cfg > /tmp/grubcfg1
reverse
cat /tmp/grubcfg1
black
kernelline=$(grep ^[^a-zA-Z0-9#]*linux /tmp/grubcfg1|sed -n -e 1p)
initrdline=$(grep ^[^a-zA-Z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*linux *//"|cut -f1 -d" ")
kernelopts=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*linux *//"|sed -e "s/$(echo $kernel|sed -e 's/\//\\\//g')//"|tr -s " ")
initrd=$(echo $initrdline|sed -e "s/^[^a-zA-Z0-9#]*initrd *//"|cut -f1 -d" ")
settingchange
elif [ "$a" = 3 ]
then
break
fi
done
fi
if [ -e /mnt/boot/grub/menu.lst -o -e /mnt/grub/menu.lst ]
then
[ -e /mnt/boot/grub/menu.lst ]&& c="/boot"||c=""
grecho "GRUB legacy settings file $c/grub/menu.lst is found."
while [ a = a ]
do
greenr
echo -n "? 1) show $c/grub/menu.lst, 2) select title, 3)end this function : "
read -s a
reverse
echo $a
black
if [ "$a" = 1 ]
then
fakemore 10 /mnt$c/grub/menu.lst
elif [ "$a" = 2 ]
then
grep title /mnt$c/grub/menu.lst | sed -e "s/^[^a-zA-Z0-9#]*title *//" > /tmp/menuentries
i=0
num=$(wc -l /tmp/menuentries|tr -s " "|sed -e "s/^ *//"|cut -d" " -f1)
while [ $i -lt $num ]
do
i=$(expr $i + 1)
reverse
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
black
done
grecho "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
grecho "=========================================="
grecho "The contents is:"
echo
num=$(grep -A15 -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt$c/grub/menu.lst|grep -n ^[^a-zA-Z0-9#]*title|sed -n -e "2p"|cut -d: -f1)
if [ -n "$num" ]
then
num=$(expr $num - 2)
else
num=15
fi
grep -A $num -e "^[^a-zA-Z0-9#]*title *$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt$c/grub/menu.lst > /tmp/grubcfg1
reverse
cat /tmp/grubcfg1
black
kernelline=$(grep ^[^a-zA-Z0-9#]*kernel /tmp/grubcfg1|sed -n -e 1p)
initrdline=$(grep ^[^a-zA-Z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*kernel *//"|cut -f1 -d" ")
kernelopts=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*kernel *//"|sed -e "s/$(echo $kernel|sed -e 's/\//\\\//g')//"|tr -s " ")
initrd=$(echo $initrdline|sed -e "s/^[^a-zA-Z0-9#]*initrd *//"|cut -f1 -d" ")
settingchange
elif [ "$a" = 3 ]
then
break
fi
done
fi
if [ -e /mnt/menu.lst ]
then
grecho "GRUB legacy settings file /menu.lst is found."
while [ a = a ]
do
grecho "? 1) show /menu.lst, 2) select title, 3)end this function : "
read -s a
reverse
echo $a
black
if [ "$a" = 1 ]
then
fakemore 10 /mnt/menu.lst
elif [ "$a" = 2 ]
then
grep title /mnt/menu.lst | sed -e "s/^[^a-zA-Z0-9#]*title *//" > /tmp/menuentries
i=0
num=$(wc -l /tmp/menuentries|tr -s " "|sed -e "s/^ *//"|cut -d" " -f1)
while [ $i -lt $num ]
do
i=$(expr $i + 1)
reverse
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
black
done
grecho "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
grecho "=========================================="
grecho "The contents is:"
grecho
num=$(grep -A15 -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt/menu.lst|grep -n ^[^a-zA-Z0-9#]*title|sed -n -e 2p|cut -d: -f1)
if [ -n "$num" ]
then
num=$(expr $num - 2)
else
num=15
fi
grep -A $num -e "^[^a-zA-Z0-9#]*title *$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt/menu.lst > /tmp/grubcfg1
reverse
cat /tmp/grubcfg1
black
kernelline=$(grep ^[^a-zA-Z0-9#]*kernel /tmp/grubcfg1|sed -n -e 1p)
initrdline=$(grep ^[^a-zA-Z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*kernel *//"|cut -f1 -d" ")
kernelopts=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*kernel *//"|sed -e "s/$(echo $kernel|sed -e 's/\//\\\//g')//"|tr -s " ")
initrd=$(echo $initrdline|sed -e "s/^[^a-zA-Z0-9#]*initrd *//"|cut -f1 -d" ")
settingchange
elif [ "$a" = 3 ]
then
break
fi
done
fi
if [ -e /mnt/boot/syslinux/syslinux.cfg -o -e /mnt/syslinux/syslinux.cfg -o -e /mnt/syslinux.cfg ]
then
[ -e /mnt/boot/syslinux/syslinux.cfg ]&& c="/boot/syslinux"
[ -e /mnt/syslinux/syslinux.cfg ]&& c="/syslinux"
[ -e /mnt/syslinux.cfg ]&& c="/"
grecho "SYSLINUX settings file $c/syslinux.cfg is found."
syslinuxfiles="/mnt$c/syslinux.cfg"
addsyslinuxconf () {
aaa=$(grep -i -e "include" $1|sed -e "s/include//")
if [ -z "$aaa" ];then return;fi
for bb in $aaa
do
if [ "a$(file /mnt$c/$bb|grep -i ASCII|grep -i text)" != "a" ]
then
syslinuxfiles="$syslinuxfiles /mnt$c/$bb"
addsyslinuxconf /mnt$c/$bb
fi
done
}
addsyslinuxconf /mnt$c/syslinux.cfg
grecho "$syslinuxfiles is/are found as configuration file(s)."
while [ a = a ]
do
grecho "? 1) show syslinux configuration file(s), 2) select menuentry, 3)end this function : "
read -s a
reverse
echo $a
black
if [ "$a" = 1 ]
then
for a in $syslinuxfiles
do
fakemore 10 $a
done
elif [ "$a" = 2 ]
then
grep -H -i ^[^a-zA-Z0-9#]*label\ * $syslinuxfiles > /tmp/menuentries
i=0
num=$(wc -l /tmp/menuentries|tr -s " "|sed -e "s/^ *//"|cut -d" " -f1)
while [ $i -lt $num ]
do
i=$(expr $i + 1)
reverse
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
black
done
grecho "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
grecho "=========================================="
grecho "The contents is:"
echo
num=$(grep -A15 -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries|cut -d: -f2)$" "$(sed -n -e $(expr $a + 1)p /tmp/menuentries|cut -d: -f1)"|grep -i -n ^[^a-zA-Z0-9#]*label\ *|sed -n -e 2p|cut -d: -f1)
if [ -n "$num" ]
then
num=$(expr $num - 2)
else
num=15
fi
grep -i -A $num -e "^[^a-zA-Z0-9#]*$(sed -n -e $(expr $a + 1)p /tmp/menuentries|cut -d: -f2)$" "$(sed -n -e $(expr $a + 1)p /tmp/menuentries|cut -d: -f1)" > /tmp/grubcfg1
# the above line has problem when label line contains ":" or file name contains ":".
reverse
cat /tmp/grubcfg1
black
kernelline=$(grep -i ^[^a-zA-Z0-9#]*kernel /tmp/grubcfg1|sed -n -e 1p)
# linux or LINUX line should be taken into account.
initrdline=$(grep -i ^[^a-zA-Z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^a-zA-Z0-9#]*kernel *//"|cut -f1 -d" ")
kernelopts=$(grep -i ^[^a-zA-Z0-9#]*append /tmp/grubcfg1|sed -e "s/^[^a-zA-Z0-9#]*append *//"|sed -e "s/^[^a-zA-Z0-9#]*APPEND *//"|tr -s " ")
if [ "a$(echo $kernelopts|grep -i initrd=)" = "a" ]
then
initrd=$(echo $initrdline|sed -e "s/^[^a-zA-Z0-9#]*initrd *//"|cut -f1 -d" ")
else
initrd=$(echo $kernelopts|sed -e "s/.*initrd=//"|cut -d" " -f1)
fi
settingchange
elif [ "$a" = 3 ]
then
break
fi
done
fi
if [ -f /mnt/ubuntu/disks/root.disk ]
then
grecho "/ubuntu/disks/root.disk is found. Maybe this is WUBI file."
device=$(grep " /mnt " /proc/mounts|cut -d" " -f1)
mkdir /mntroot
umount $device
mount -t $(blkid $device|sed -e "s/.*TYPE=\"//"|sed -e "s/\".*//") $device /mntroot
mount -o loop /mntroot/ubuntu/disks/root.disk /mnt
if [ $? = 0 ]
then
kernel="/vmlinuz"
initrd="/initrd.img"
kernelopts="root=UUID=$(blkid $device|sed -e 's/^.*UUID=\"//'|sed -e 's/\".*//') loop=/ubuntu/disks/root.disk ro"
settingchange
else
rdecho "$device /ubuntu/disks/root.disk is failed to be mounted."
fi
fi
fi
if [ -n "$(echo $aa|grep zzz)" ]
then
PS1='(kiyoChelp) ' /bin/sh -i </dev/console >/dev/console 2>&1
fi
grecho "======================================"
grecho "The following kernels seems to be available."
kernels1=$(ls /mnt/boot/ -1|grep vmlinuz)
kernels=""
i=0
for a in $kernels1
do
if [ -n "$(ls -1 /mnt/boot/initrd*$(echo $a|cut -c9-))*" ]
then
reverse
echo $i":"$(echo $kernels1|cut -d" " -f $(expr $i + 1))
black
i=$(expr $i + 1)
kernels="$kernels $a"
fi
done
grecho "Please type the number of the kernel you want to boot."
readloop "${kernels}"
kernel=$(echo ${kernels}|cut -d" " -f $(expr $a + 1))
grecho "You selected $a:$kernel"
grecho "The following option is suggested to pass to the kernel:"
reverse
echo "root=UUID=$(blkid|grep "$device:"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro"
grecho ""
grecho "Please enter commandline parameter to pass to kernel."
grecho "If you accept the suggested option, please type nothing."
read -s a
reverse
echo $a
black
checkelf /mnt/boot/$kernel
if [ -n "$a" ]
then
kexec -l /mnt/boot/$kernel $elfarg --append="$a" --initrd=$(ls /mnt/boot/initrd*$(echo $kernel|cut -c9-)*|tail -n1)
kexec -e
else
kexec -l /mnt/boot/$kernel $elfarg --append="root=UUID=$(blkid|grep "$device:"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro" --initrd=$(ls /mnt/boot/initrd*$(echo $kernel|cut -c9-)*|tail -n1)
kexec -e
fi
umount -l /mnt
panipani

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since 2011/9/25
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