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The mkfs.ext2 heuristics select the "small" ext2 usage type, which does not fit well with GiB-sized pen drives. For example, the block size is just 1024 bytes compared to 4096 for "default". Therefore, we enforce the default usage type as this fits our use case of dumping the image to USB sticks better.
50 lines
1.4 KiB
Plaintext
50 lines
1.4 KiB
Plaintext
##
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# Create disk image with contents of the run directory
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#
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# \param --image-disk-size disk size in MiB
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#
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source [genode_dir]/tool/run/iso.inc
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proc image_disk_size { } { return [get_cmd_arg --image-disk-size 0] }
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##
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# Create disk image with the content of the run directory
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#
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proc run_image { {unused ""} } {
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requires_installation_of parted
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requires_installation_of resize2fs
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requires_installation_of fallocate
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set grub_img "[genode_dir]/tool/grub2-head.img"
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set disk_img "[run_dir].img"
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set part1_img "[run_dir]-part1.img"
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set run_size [expr [regsub {\s.*} [exec du -sm [run_dir]] {}] + 8]
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if {[image_disk_size] > 0} {
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set disk_size [image_disk_size]
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} else {
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set disk_size $run_size
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}
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set part1_size [expr $disk_size - 1]MiB
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# extract and resize partition image
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exec dd if=$grub_img of=$part1_img bs=1M skip=1 2>/dev/null
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exec fallocate -l $part1_size $part1_img
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exec resize2fs $part1_img 2>/dev/null
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# populate partition with binaries
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exec [genode_dir]/tool/rump -F ext2fs -p [run_dir] $part1_img
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# merge final image from GRUB2 head and partition
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exec dd if=$grub_img of=$disk_img status=noxfer bs=1M count=1 2>/dev/null
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exec dd if=$part1_img of=$disk_img status=noxfer bs=1M seek=1 2>/dev/null
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exec parted -s $disk_img -- rm 1 mkpart primary 2048s -1s set 1 boot on
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exec rm -f $part1_img
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puts "Created image file $disk_img ($disk_size MiB)"
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}
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