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Cleanup archiso hook

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Fix squashfs mounting of all isomounts images, along
with a few other changes

Signed-off-by: Aaron Griffin <aaronmgriffin@gmail.com>
This commit is contained in:
Aaron Griffin 2008-12-23 00:51:20 -06:00
parent 978fdafbff
commit f1c46e0d3f
1 changed files with 37 additions and 37 deletions
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64
archiso/hooks/archiso
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@ -6,17 +6,27 @@ _mnt_bind()
/bin/mount -o bind ${1} /real_root${2}
}
# args: image file
# args: /path/to/image_file
_mnt_squashfs()
{
msg "::: Adding new union branch: ${1}"
/bin/modprobe -q loop >/dev/null 2>&1
img="${1}"
base_img="${img##*/}";
if [ "${copytoram}" = "y" ]; then
msg ":: Copying squashfs image to RAM"
/bin/cat ${img} > "/tmpfs/${base_img}"
img="/tmpfs/${base_img}"
fi
msg "::: Adding new union branch: ${base_img%.*}"
mkdir -p "/tmpfs/mnt/loop${LOOP_NUM}"
# sometimes it takes udev a while to create device nodes
until [ -e "/dev/loop${LOOP_NUM}" ]; do
while [ ! -e "/dev/loop${LOOP_NUM}" ]; do
sleep 1
done
if ! /bin/losetup "/dev/loop${LOOP_NUM}" ${1}; then
if ! /bin/losetup "/dev/loop${LOOP_NUM}" ${img}; then
echo "ERROR: Cannot mount loop device /dev/loop${LOOP_NUM}"
break
fi
@ -46,14 +56,13 @@ run_hook ()
msg ":: Scanning for boot device..."
/bin/mkdir -p /bootmnt
bootmnt="/bootmnt"
found=0
/bin/modprobe -q isofs >/dev/null 2>&1
msg ":: Scanning cd drives..."
for cdrom in /dev/hd[a-z] /dev/sr[0-9]* /dev/scd[a-z] /dev/sg[0-9]*; do
if mount -r -t iso9660 "${cdrom}" ${bootmnt} >/dev/null 2>&1; then
if [ -e "${bootmnt}/isomounts" ]; then
if mount -r -t iso9660 "${cdrom}" /bootmnt >/dev/null 2>&1; then
if [ -e "/bootmnt/isomounts" ]; then
found=1
msg "${cdrom}"
break
@ -61,15 +70,15 @@ run_hook ()
else
echo "Failed to mount ${cdrom}"
fi
[ ${found} -eq 0 ] && umount ${bootmnt} >/dev/null 2>&1
[ ${found} -eq 0 ] && umount /bootmnt >/dev/null 2>&1
done
if [ ${found} -eq 0 ]; then
msg ":: Scanning usb drives..."
for usb in /dev/sd[a-z][0-9]; do
if mount -r -t vfat "${usb}" ${bootmnt} >/dev/null 2>&1 ||\
mount -r -t ext2 "${usb}" ${bootmnt} >/dev/null 2>&1; then
if [ -e "${bootmnt}/isomounts" ]; then
if mount -r -t vfat "${usb}" /bootmnt >/dev/null 2>&1 ||\
mount -r -t ext2 "${usb}" /bootmnt >/dev/null 2>&1; then
if [ -e "/bootmnt/isomounts" ]; then
found=1
msg "${usb}"
break
@ -77,7 +86,7 @@ run_hook ()
else
echo "Failed to mount ${usb}"
fi
[ ${found} -eq 0 ] && umount ${bootmnt} >/dev/null 2>&1
[ ${found} -eq 0 ] && umount /bootmnt >/dev/null 2>&1
done
fi
@ -88,21 +97,13 @@ run_hook ()
exit 1
fi
base_img="${bootmnt}/root-image.sqfs"
if [ "${copytoram}" = "y" ]; then
msg ":: Copying squashfs image to RAM"
/bin/cat ${base_img} > /tmpfs/root-image.sqfs
base_img="/tmpfs/root-image.sqfs"
fi
/bin/modprobe -q squashfs >/dev/null 2>&1
/bin/modprobe -q unionfs >/dev/null 2>&1
msg ":: Mounting root (union) filesystem"
/bin/modprobe -q unionfs >/dev/null 2>&1
/bin/mount -t unionfs -o dirs=/tmpfs=rw none /real_root
export LOOP_NUM="0"
if [ -e "/isomounts" ]; then
msg ":: Mounting images"
while read img imgarch mountpoint type; do
# check if this line is a comment (starts with #)
@ -110,18 +111,17 @@ run_hook ()
[ "$imgarch" != "$arch" ] && continue
if [ "${type}" = "bind" ]; then
_mnt_bind ${img} ${mountpoint}
elif [ "${type}" = "squashfs" ]; then
_mnt_squashfs "${img}"
fi
done < /isomounts
else
msg ":: No mountable images found"
fi
[ ! -f "/bootmnt/${img}" ] && continue
# layer the "pristine" base system image last
_mnt_squashfs ${base_img}
if [ "${type}" = "bind" ]; then
_mnt_bind "/bootmnt/${img}" ${mountpoint}
elif [ "${type}" = "squashfs" ]; then
_mnt_squashfs "/bootmnt/${img}"
fi
done < "/bootmnt/isomounts"
# Bind our bootmnt dir into the live system
_mnt_bind /bootmnt bootmnt
if [ -d /proc/sys/dev/cdrom ]; then
echo 0 > /proc/sys/dev/cdrom/lock