代码: 全选
#!/bin/sh
# set -e
export PATH=/root/usr/bin:/root/usr/sbin:/root/bin:/root/sbin:/usr/bin:/usr/sbin:/bin:/sbin
#iso文件的的挂载点
mountpoint=/iso_cdrom
mkdir -p $mountpoint
mkdir -p /cdrom
find_wyj=edgy #要找的文件夹
#overlay_method=unionfs
#if [ "${DPKG_ARCH}" = "ia64" ] || [ "${DPKG_ARCH}" = "hppa" ] || [ "${DPKG_ARCH}" = "sparc" ]; then
# overlay_method=devmapper
#fi
#初始化用户名、用户全称、主机名
USERNAME=ubuntu
USERFULLNAME="Live session user"
HOST=ubuntu
[ -f /etc/casper.conf ] && . /etc/casper.conf
export USERNAME USERFULLNAME HOST
#验证 live cd 的映象
is_casper_path() {
path=$1
if [ -d "$path/casper" ]; then
if [ "$(echo $path/casper/*.cloop)" != "$path/casper/*.cloop" ] ||
[ "$(echo $path/casper/*.squashfs)" != "$path/casper/*.squashfs" ]; then
return 0
fi
fi
return 1
}
#得到全部磁盘分区的列表
subdevices() {
sysblock=$1
r=""
for dev in "${sysblock}" "${sysblock}"/*; do
if [ -e "${dev}/dev" ]; then
r="${r} ${dev}"
fi
done
echo ${r}
}
#获得环回(loop)设备
get_backing_device() {
case "$1" in
*.cloop)
echo $(setup_loop "$1" "cloop" "/sys/block/cloop*")
;;
*.squashfs)
echo $(setup_loop "$1" "loop" "/sys/block/loop*")
;;
*)
panic "Unrecognized casper filesystem: $1"
;;
esac
}
match_files_in_dir() {
# Does any files match pattern $1 ?
local pattern="$1"
if [ "$(echo $pattern)" != "$pattern" ]; then
return 0
fi
return 1
}
mount_images_in_directory() {
directory="$1"
rootmnt="$2"
if match_files_in_dir "$directory/casper/*.cloop"; then
# Let's hope there's just one matching *.cloop... FIXME
setup_devmapper $(get_backing_device "$directory/casper/*.cloop") "$rootmnt"
elif match_files_in_dir "$directory/casper/*.squashfs"; then
setup_unionfs "$directory/casper" "$rootmnt"
else
:
fi
}
#生成/dev的设备名
sys2dev() {
sysdev=${1#/sys}
echo "/dev/$(udevinfo -q name -p ${sysdev} 2>/dev/null|| echo ${sysdev##*/})"
}
#安装文件到环回设备
setup_loop() {
local fspath=$1
local module=$2
local pattern=$3
modprobe -Qb "$module"
udevsettle
for loopdev in $pattern; do
if [ "$(cat $loopdev/size)" -eq 0 ]; then
dev=$(sys2dev "${loopdev}")
losetup "$dev" "$fspath"
echo "$dev"
return 0
fi
done
panic "No loop devices available"
}
#获得文件系统的类别
get_fstype() {
local FSTYPE
local FSSIZE
eval $(fstype < $1)
if [ "$FSTYPE" != "unknown" ]; then
echo $FSTYPE
return 0
fi
/lib/udev/vol_id -t $1 2>/dev/null
}
#安装磁盘映象(可写入的)
setup_devmapper() {
backdev="$1"
rootmnt="$2"
modprobe -Qb dm-mod
COW_DEVICE=/dev/ram1
COW_NAME="casper-cow"
BACKING_FILE_SIZE=$(blockdev --getsize "$backdev")
MAX_COW_SIZE=$(blockdev --getsize "$COW_DEVICE")
CHUNK_SIZE=8 # sectors
if [ -z "$COW_SIZE" -o "$COW_SIZE" -gt "$MAX_COW_SIZE" ]; then
COW_SIZE=$MAX_COW_SIZE
fi
echo "0 $COW_SIZE linear $COW_DEVICE 0" | dmsetup create $COW_NAME
echo "0 $BACKING_FILE_SIZE snapshot $backdev /dev/mapper/$COW_NAME p $CHUNK_SIZE" | \
dmsetup create casper-snapshot
if [ "$(get_fstype $backdev)" = "unknown" ]; then
panic "Unknown file system type on $backdev"
fi
mount -t $(get_fstype "$backdev") /dev/mapper/casper-snapshot $rootmnt || panic "Can not mount /dev/mapper/casper/snapshot on $rootmnt"
mkdir -p "$rootmnt/rofs"
echo "0 $BACKING_FILE_SIZE linear $backdev 0" | dmsetup create casper-backing
mount -t $(get_fstype "$backdev") /dev/mapper/casper-backing "$rootmnt/rofs"
}
#验证及获取挂载点的位置
where_is_mounted() {
device=$1
if grep -q "^$device " /proc/mounts; then
grep "^$device " /proc/mounts | read d mountpoint rest
echo $mountpoint
return 0
fi
return 1
}
#查找可写入的 cow 设备
find_cow_device() {
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop); do
for dev in $(subdevices "${sysblock}"); do
devname=$(sys2dev "${dev}")
if [ "$(/lib/udev/vol_id -l $devname 2>/dev/null)" = "casper-rw" ]; then
echo "$devname"
return
elif [ "$(get_fstype ${devname})" = "vfat" ]; then
mkdir -p /cow-backing
if where_is_mounted ${devname} > /dev/null; then
mount -o remount,rw ${devname} $(where_is_mounted ${devname}) || panic "Remounting failed"
mount -o bind $(where_is_mounted ${devname}) /cow-backing || panic "Cannot bind-mount"
else
mount -t $(get_fstype "${devname}") -o rw "${devname}" /cow-backing || panic "Cannot mount $devname on /cow-backing"
fi
if [ -e "/cow-backing/casper-rw" ]; then
echo $(setup_loop "/cow-backing/casper-rw" "loop" "/sys/block/loop*")
return 0
else
umount /cow-backing
fi
fi
done
done
return 1
}
#安装联合文件系统 (可写入的
setup_unionfs() {
image_directory="$1"
rootmnt="$2"
modprobe -Qb unionfs
# run-init can't deal with this, but we're going to move all of these
# away before it runs anyway.
croot="/casper"
# Let's just mount the read-only file systems first
mkdir -p "${croot}"
for image in "${image_directory}"/*.squashfs; do
imagename=$(basename "${image}")
backdev=$(get_backing_device "$image")
fstype=$(get_fstype "${backdev}")
if [ "${fstype}" = "unknown" ]; then
panic "Unknown file system type on ${backdev} (${image})"
fi
mkdir -p "${croot}/${imagename}"
mount -t "${fstype}" -o ro "${backdev}" "${croot}/${imagename}" || panic "Can not mount $backdev ($image) on ${croot}/${imagename}"
done
rofsstring=""
for dir in $(mount -t squashfs | cut -d\ -f 3); do
rofsstring="$dir=ro:$rofsstring"
done
rofsstring=${rofsstring%:}
if [ "$ubuntu_fs" ] ; then
cow=$ubuntu_fs
else
mkdir -p /cow
mount -t tmpfs tmpfs /cow
cow=/cow
fi
mount -t unionfs -o dirs=$cow=rw:$rofsstring unionfs "$rootmnt"
for d in $(mount -t squashfs | cut -d\ -f 3); do
mkdir -p "${rootmnt}/casper/${d##*/}"
mount -o move "${d}" "${rootmnt}/casper/${d##*/}"
done
if [ "$ubuntu_fs" ] ; then
mkdir -p "$rootmnt/ubuntu.fs"
mount -o bind $cow "$rootmnt/ubuntu.fs"
fi
mkdir -p "$rootmnt/iso_cdrom"
mount -o bind $mountpoint "$rootmnt/iso_cdrom"
}
#验证是否为usb磁盘
is_usb_device() {
sysfs_path="${1#/sys}"
if /lib/udev/path_id "${sysfs_path}" | grep -q "ID_PATH=(usb|pci-[^-]*-usb)"; then
return 0
fi
return 1
}
#生成/fstab文件
make_fstab() {
#找所的硬盘及分区
cat /proc/partitions | tr -s "[\ ]" | cut -d\ -f5 | tr "[\n]" "[ ]" > /dev_tmp
#开始生成fstab
msfscount=98 #ms文件系统计数值: 98对应B
for dev_name in $(cat /dev_tmp) ; do
fstype=$(get_fstype "/dev/${dev_name}")
case "$fstype" in
reiserfs|minix|xfs|jfs|ext3|ext2|swap|ntfs|vfat)
get_mountpoint
mkdir -p ${getmountpoint}
get_mountoptions
echo "/dev/${dev_name} ${getmountpoint} ${fstype} ${getmountoptions} 0 0 " >> /fstab
;;
esac
done
#找所有的光驱
for sysblock in $(echo /sys/block/* | tr ' ' '\n' | grep -v loop | grep -v ram); do
hd_dev=$(echo "$(udevinfo -q name -p ${sysblock#/sys} 2>/dev/null || echo ${sysblock##*/})")
if /lib/udev/cdrom_id /dev/${hd_dev} > /dev/null; then
echo "/dev/${hd_dev} /media/${hd_dev} auto noauto,user 0 0 " >> /fstab
mkdir -p /media/${hd_dev}
fi
done
rm /dev_tmp
}
#生成挂载点
get_mountpoint(){
getmountpoint=
case "$fstype" in
ntfs*|vfat|msdos)
msfscount=$(expr $msfscount + 1)
getmountpoint=/media/`echo -e -n "\\x$(printf %x $msfscount)"`_win ;;
swap) getmountpoint="none" ;;
*) getmountpoint="/media/${dev_name}" ;;
esac
}
#生成挂载选项
get_mountoptions(){
getmountoptions=
case "$fstype" in
vfat) getmountoptions="umask=000,shortname=winnt,user,exec,utf8," ;;
msdos) getmountoptions="umask=000,user,exec,utf8" ;;
swap) getmountoptions="defaults" ;;
ntfs) getmountoptions="umask=000,user,exec,utf8";;
*) getmountoptions="user,exec";;
esac
}
#搜索磁盘,找相关文件
find_file() {
modprobe -Qb loop
while read hd_dev hd_mount_point hd_fstype hd_mount_options dump fcsk ; do
case "$hd_fstype" in
reiserfs|minix|xfs|jfs|ext3|ext2|ntfs|vfat)
modprobe -Qb "$hd_fstype"
mkdir -p /"${hd_mount_point##*/}"
mount -t ${hd_fstype} -o "${hd_mount_options##*user,}" ${hd_dev} /"${hd_mount_point##*/}" || continue
find_swap_fs
if [ ! -d /"${hd_mount_point##*/}/$find_wyj" ];then
umount /"${hd_mount_point##*/}"
fi
find_iso
find_ubuntu_fs
if [ "$findiso" -a "$findubuntufs" -a "$findswapfs" ];then #三个文件都没有在这个分区上,就卸载它
umount /"${hd_mount_point##*/}"
continue
fi
if [ "$iso_cdrom" -a "$ubuntu_fs" -a "$swap_fs" ];then #三个文件都找到,就返回
return
fi
;;
esac
done
}
#找live cd iso 映象
find_iso() {
if [ -z "$iso_cdrom" ];then
for iso in $(echo /"${hd_mount_point##*/}"/$find_wyj/*.[iI][sS][oO] ) ; do
mount -t iso9660 -o loop $iso $mountpoint || continue
if is_casper_path $mountpoint; then
iso_cdrom=$mountpoint
findiso=
return
else
umount $mountpoint
fi
done
fi
findiso=no
}
#找可写入的ubuntu.fs文件系统
find_ubuntu_fs() {
if [ -z "$ubuntu_fs" ];then
if [ -f /"${hd_mount_point##*/}"/$find_wyj/ubuntu.fs ]; then
ubuntufstype=$(get_fstype /"${hd_mount_point##*/}"/$find_wyj/ubuntu.fs )
mkdir -p /ubuntu_fs
if mount -t $ubuntufstype -o rw,loop /"${hd_mount_point##*/}"/$find_wyj/ubuntu.fs /ubuntu_fs ; then
ubuntu_fs=/ubuntu_fs
findubuntufs=
return
fi
fi
case $hd_fstype in
reiserfs|minix|xfs|jfs|ext3|ext2)
if [ -d /"${hd_mount_point##*/}"/$find_wyj/ubuntu.fs ]; then
ubuntu_fs=/"${hd_mount_point##*/}"/$find_wyj/ubuntu.fs
findubuntufs=
return
fi
;;
esac
fi
findubuntufs=no
}
#找 swap 文件
find_swap_fs() {
if [ -z "$swap_fs" ];then
if [ -f /"${hd_mount_point##*/}"/swap.fs ]; then
swap_fs=$hd_mount_point
findswapfs=
return
fi
fi
findswapfs=no
}
#设定usplash 延时
set_usplash_timeout() {
if [ -x /sbin/usplash_write ]; then
/sbin/usplash_write "TIMEOUT 120"
fi
}
#挂载 root 文件系统
mountroot() {
exec 6>&1
exec 7>&2
exec > casper.log
exec 2>&1
set_usplash_timeout
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-premount"
run_scripts /scripts/casper-premount
[ "$quiet" != "y" ] && log_end_msg
# Needed here too because some things (*cough* udev *cough*)
# changes the timeout
set_usplash_timeout
for i in 0 1 2 3 4 5 6 ; do
rm /fstab
make_fstab
find_file < /fstab
if [ "${iso_cdrom}" ]; then
break
fi
sleep 2
done
if [ "$?" -gt 0 ]; then
panic "Unable to find a medium containing a live file system"
fi
mount_images_in_directory "$iso_cdrom" "$rootmnt"
log_end_msg
#配置系统
if [ ! -e $rootmnt/etc/gnix.oag@gmail.com ];then
touch $rootmnt/etc/gnix.oag@gmail.com
maybe_break casper-bottom
[ "$quiet" != "y" ] && log_begin_msg "Running /scripts/casper-bottom"
run_scripts /scripts/casper-bottom
mv /media/* $rootmnt/media/
#配置 swap 文件
if [ "$swap_fs" ]; then
mount -o bind "${swap_fs##*/}" $rootmnt$swap_fs
cat >> /fstab <<EOF
$swap_fs/swap.fs swap swap defaults 0 0
EOF
fi
cat /fstab >> $rootmnt/etc/fstab
#修正时间相差8小时
chroot /root sed -i -e "s/^UTC=.*\$/UTC=no/" /etc/default/rcS
#不显示桌面上的分区图标
chroot /root sudo -u "$USERNAME" gconftool-2 -s -t bool /apps/nautilus/desktop/volumes_visible false
[ "$quiet" != "y" ] && log_end_msg
fi
exec 1>&6 6>&-
exec 2>&7 7>&-
cp casper.log "${rootmnt}/var/log/"
}