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Linux起動用initスクリプトver.4

http://kiyoandkei.blog68.fc2.com/blog-entry-25.htmlに、以下の機能を追加しました。
grub legacyやgrub2の設定ファイルの内容そのままでは起動できない場合に、簡単にちょっと修正して起動を試みることができるようにしました。

initの内容は以下のとおりです。


#!/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
echo ==========================
echo "Please wait until all the device you want to boot is recognized and then push ENTER key."
echo ==========================
read a
deviceslist=$(blkid|cut -d: -f1)
okdeviceslist=""
for a in $deviceslist
do
umount -l /mnt 2>/dev/null
mount -t auto $a /mnt 2>/dev/null || continue
okdeviceslist="${okdeviceslist} $a"
umount -l /mnt 2>/dev/null
done
i=0
echo ==========================
echo "The device file names and information of partitions will be recognized and are shown below."
echo
for a in ${okdeviceslist}
do
echo $i":"$(blkid|grep "${a}:")
i=$(expr $i + 1)
done
echo
echo "You can look upper by pushing SHIFT and PageUp keys at the same time."
echo "Please type the number of the device file name of the root partition of Ubuntu you want to boot."
readloop()
{
while [ a = a ]
do
read a
if [ $a -ge 0 ]
then
if [ $? = 1 ]
then
echo "Please type number"
continue
elif [ $a -lt "$(echo $*|tr ' ' '\n'|wc -l)" ]
then
break
else
echo "Please type number smaller than $(echo $*|tr ' ' '\n'|wc -l)"
continue
fi
echo "Please type number larger than 0 or 0"
fi
done
}
readloop "${okdeviceslist}"
device=$(echo ${okdeviceslist}|cut -d" " -f $(expr $a + 1))
echo "You selected $a:$device"
mount -t auto $device /mnt
echo "If you want to search Grub settings, please type y"
echo "If you want to get into busybox, please type zzz"
read aa
if [ -n "$(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 $ln ]
do
sed -n "$num,$(expr $num + $step) p" $2
read -p "## Please enter q to quit displaying: " b
if [ a"$b" = "aq" ]
then
break
fi
num=$(expr $num + $step + 1)
done
return
}
settingchange () {
while [ a = a ]
do
echo "kernel is: $kernel"
echo "initrd is: $initrd"
echo "kernel option is: $kernelopts"
read -p "Do you want to boot with the above settings? (nothing:yes, c:edit settings, any other: quit selecting this menuentry) : " q
if [ "a$q" = "a" -o "a$q" = "ay" -o "a$q" = "ayes" ]
then
kexec -l /mnt${kernel} --initrd=/mnt${initrd} --append="${kernelopts}"
kexec -e
elif [ "a$q" = "ac" ]
then
read -p "Type the kernel file in full path (nothing:unchanged): " q
if [ "a$q" != "a" ]; then kernel=$q;fi
read -p "Type the initrd file in full path (nothing:unchanged): " q
if [ "a$q" != "a" ]; then initrd=$q;fi
read -p "Type the kernel option (nothing:unchanged): " q
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=""
echo "$c/grub/grub.cfg (GRUB2 settings file)is found."
while [ a = a ]
do
echo -n "? 1) show $c/grub/grub.cfg, 2) select menuentry, 3)end this function : "
read a
if [ "$a" = 1 ]
then
fakemore 10 /mnt$c/grub/grub.cfg
elif [ "$a" = 2 ]
then
grep menuentry /mnt$c/grub/grub.cfg | sed -e "s/^[^A-z0-9#]*menuentry *//" > /tmp/menuentries
i=0
num=$(wc -l /tmp/menuentries|tr -s " "|sed -e "s/ *//"|cut -d" " -f1)
while [ $i -lt $num ]
do
i=$(expr $i + 1)
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
done
echo "You can look upper by pushing SHIFT and PageUp keys at the same time."
echo "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
echo "=========================================="
echo "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$c/grub/grub.cfg > /tmp/grubcfg1
cat /tmp/grubcfg1
kernelline=$(grep ^[^A-z0-9#]*linux /tmp/grubcfg1|sed -n -e 1p)
initrdline=$(grep ^[^A-z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^A-z0-9#]*linux *//"|cut -f1 -d" ")
kernelopts=$(echo $kernelline|sed -e "s/^[^A-z0-9#]*linux *//"|tr -s " "|cut -f2- -d" ")
initrd=$(echo $initrdline|sed -e "s/^[^A-z0-9#]*initrd *//"|cut -f1 -d" ")
settingchange
elif [ "$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=""
echo "GRUB legacy settings file $c/grub/menu.lst is found."
while [ a = a ]
do
echo -n "? 1) show $c/grub/menu.lst, 2) select title, 3)end this function : "
read a
if [ "$a" = 1 ]
then
fakemore 10 /mnt$c/grub/menu.lst
elif [ "$a" = 2 ]
then
grep title /mnt$c/grub/menu.lst | sed -e "s/^[^A-z0-9#]*title *//" > /tmp/menuentries
i=0
num=$(wc -l /tmp/menuentries|tr -s " "|sed -e "s/^ *//"|cut -d" " -f1)
while [ $i -lt $num ]
do
i=$(expr $i + 1)
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
done
echo "You can look upper by pushing SHIFT and PageUp keys at the same time."
echo "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
echo "=========================================="
echo "The contents is:"
echo
num=$(grep -A15 -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt$c/grub/menu.lst|grep -n ^[^A-z0-9#]*title *|sed -n -e "2p"|cut -d: -f1)
if [ -n "$num" ]
then
num=$(expr $num - 2)
else
num=15
fi
grep -A $num -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt$c/grub/menu.lst > /tmp/grubcfg1
cat /tmp/grubcfg1
kernelline=$(grep ^[^A-z0-9#]*kernel /tmp/grubcfg1|sed -n -e 1p)
initrdline=$(grep ^[^A-z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^A-z0-9#]*kernel *//"|cut -f1 -d" ")
kernelopts=$(echo $kernelline|sed -e "s/^[^A-z0-9#]*kernel *//"|tr -s " "|cut -f2- -d" ")
initrd=$(echo $initrdline|sed -e "s/^[^A-z0-9#]*initrd *//"|cut -f1 -d" ")
settingchange
elif [ "$a" = 3 ]
then
break
fi
done
fi
if [ -e /mnt/menu.lst ]
then
echo "GRUB legacy settings file /menu.lst is found."
while [ a = a ]
do
echo -n "? 1) show /menu.lst, 2) select title, 3)end this function : "
read a
if [ "$a" = 1 ]
then
fakemore 10 /mnt/menu.lst
elif [ "$a" = 2 ]
then
grep title /mnt/menu.lst | sed -e "s/^[^A-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)
echo $(expr $i - 1):$(sed -n -e "${i}p" /tmp/menuentries)
done
echo "You can look upper by pushing SHIFT and PageUp keys at the same time."
echo "Please type the number of the menu you want to look inside"
readloop "$(cat /tmp/menuentries|tr -d ' ')"
echo "=========================================="
echo "The contents is:"
echo
num=$(grep -A15 -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt/menu.lst|grep -n ^[^A-z0-9#]*title *|sed -n -e 2p|cut -d: -f1)
if [ -n "$num" ]
then
num=$(expr $num - 2)
else
num=15
fi
grep -A $num -e "$(sed -n -e $(expr $a + 1)p /tmp/menuentries)$" /mnt/menu.lst > /tmp/grubcfg1
cat /tmp/grubcfg1
kernelline=$(grep ^[^A-z0-9#]*kernel /tmp/grubcfg1|sed -n -e 1p)
initrdline=$(grep ^[^A-z0-9#]*initrd /tmp/grubcfg1|sed -n -e 1p)
kernel=$(echo $kernelline|sed -e "s/^[^A-z0-9#]*kernel *//"|cut -f1 -d" ")
kernelopts=$(echo $kernelline|sed -e "s/^[^A-z0-9#]*kernel *//"|tr -s " "|cut -f2- -d" ")
initrd=$(echo $initrdline|sed -e "s/^[^A-z0-9#]*initrd *//"|cut -f1 -d" ")
settingchange
elif [ "$a" = 3 ]
then
break
fi
done
fi
fi
if [ -n "$(echo $aa|grep zzz)" ]
then
PS1='(kiyoChelp) ' /bin/sh -i </dev/console >/dev/console 2>&1
fi
echo "======================================"
echo "The following kernels seems to be available."
kernels1=$(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
echo $i":"$(echo $kernels1|cut -d" " -f $(expr $i + 1))
i=$(expr $i + 1)
kernels="$kernels $a"
fi
done
echo "You can look upper by pushing SHIFT and PageUp keys at the same time."
echo "Please type the number of the kernel you want to boot."
readloop "${kernels}"
kernel=$(echo ${kernels}|cut -d" " -f $(expr $a + 1))
echo "You selected $a:$kernel"
echo "The following option is suggested to pass to the kernel:"
echo "root=UUID=$(blkid|grep "$device:"|sed -e "s/^.*UUID=\"//"|sed -e "s/\".*//") ro"
echo ""
echo "Please enter commandline parameter to pass to kernel."
echo "If you accept the suggested option, please type nothing."
read a
if [ -n "$a" ]
then
kexec -l /mnt/boot/$kernel --append="$a" --initrd=$(ls /mnt/boot/initrd*$(echo $kernel|cut -c9-)*|tail -n1)
kexec -e
else
kexec -l /mnt/boot/$kernel --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
echo "DAMESSU! I will try to make you use terminal"
PS1='(kiyoChelp) ' /bin/sh -i </dev/console >/dev/console 2>&1
echo "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."



initの内容は以上です。
http://kiyoandkei.blog68.fc2.com/blog-entry-17.htmlと同様にして準備をすれば、使うことができます。
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テーマ : Linux
ジャンル : コンピュータ

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kiyoshi

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since 2011/9/25
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上記広告は1ヶ月以上更新のないブログに表示されています。新しい記事を書くことで広告を消せます。