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b46084695f
This will replace the tools/mkimage-* Docker images. Signed-off-by: Justin Cormack <justin.cormack@docker.com>
69 lines
1.4 KiB
Bash
Executable File
69 lines
1.4 KiB
Bash
Executable File
#!/bin/sh
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# currently only supports ext4 disks; will extend for other filesystems, ISO, ...
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do_mkfs()
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{
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diskdev="$1"
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# new disks does not have an DOS signature in sector 0
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# this makes sfdisk complain. We can workaround this by letting
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# fdisk create that DOS signature, by just do a "w", a write.
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# http://bugs.alpinelinux.org/issues/145
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echo "w" | fdisk $diskdev >/dev/null
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# format one large partition
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echo ";" | sfdisk --quiet $diskdev
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# update status
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blockdev --rereadpt $diskdev 2> /dev/null
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# wait for device
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for i in $(seq 1 50); do test -b "$DATA" && break || sleep .1; mdev -s; done
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FSOPTS="-O resize_inode,has_journal,extent,huge_file,flex_bg,uninit_bg,64bit,dir_nlink,extra_isize"
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mkfs.ext4 -q -F $FSOPTS ${diskdev}1
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}
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DEV="$(find /dev -maxdepth 1 -type b ! -name 'loop*' | grep -v '[0-9]$' | sed 's@.*/dev/@@' | sort | head -1 )"
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[ -z "${DEV}" ] && exit 1
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DRIVE="/dev/${DEV}"
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# format
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do_mkfs "$DRIVE"
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PARTITION="${DRIVE}1"
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# mount
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mount "$PARTITION" /mnt
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# copy kernel, initrd
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cp -a /data/kernel /data/initrd.img /mnt/
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# create syslinux.cfg
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CMDLINE="$(cat /data/cmdline)"
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CFG="DEFAULT linux
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LABEL linux
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KERNEL /kernel
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INITRD /initrd.img
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APPEND ${CMDLINE}
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"
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printf "$CFG" > /mnt/syslinux.cfg
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# install syslinux
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extlinux --install /mnt
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# unmount
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umount /mnt
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# install mbr
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dd if=usr/share/syslinux/mbr.bin of="$DRIVE" bs=440 count=1
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# make bootable
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sfdisk -A "$DRIVE" 1
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