89 lines
2.7 KiB
Plaintext
89 lines
2.7 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/grub2.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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set sgdisk [installed_command sgdisk]
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# make copy of template grub2 header image
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exec cp [get_grub2_dir]/boot/grub2-head.img [run_dir].header
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# remove template partition
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exec $sgdisk --delete=3 [run_dir].header
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# calculate size of grub2 header and the size of Genode scenario
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set size_header [expr [regsub {\s.*} [exec du -b [run_dir].header] {}]]
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set size_run [expr [regsub {\s.*} [exec du -skL [run_dir]] {}]]
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# try to compensate ext2 overhead in disk size
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set ext2_overhead 768
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if {[image_disk_size] > 0} {
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set disk_size_kb [expr [image_disk_size] * 1024]
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} else {
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set disk_size_kb [expr ($size_run + $ext2_overhead) / 32 * 32]
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}
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# setup partition with content
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exec dd if=/dev/zero of=[run_dir].partition bs=1k count=$disk_size_kb 2>/dev/null
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exec [installed_command mkfs.ext2] -L GENODE -q -T default [run_dir].partition
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# copy content to disk image
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foreach file [exec find [run_dir]] {
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set filename [string replace $file 0 [string length [run_dir]] ""]
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if {[string length $filename] == 0} {
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continue
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}
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if {[file isdirectory $file]} {
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exec [installed_command e2mkdir] [run_dir].partition:$filename
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} else {
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exec [installed_command e2cp] $file [run_dir].partition:$filename
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}
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}
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# calculate start/end sector of content partition
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set first_sector [expr $size_header / 512]
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set last_sector [expr ((($size_header + ($disk_size_kb * 1024)) / 512) - 1)]
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# add free space for the backup gpt at the end of disk
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set sector_backup [exec $sgdisk --info=1 [run_dir].header]
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set sector_backup [regexp -all -line -inline {First sector: ([0-9]+)} $sector_backup]
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set sector_backup [lindex $sector_backup 1]
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exec dd if=/dev/zero of=[run_dir].empty bs=512 count=$sector_backup 2>/dev/null
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# merge final image from GRUB2 head and partition
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exec cat [run_dir].header [run_dir].partition [run_dir].empty > [run_dir].img
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# cleanup
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exec rm [run_dir].empty
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exec rm [run_dir].header
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exec rm [run_dir].partition
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# move backup GPT to the end of the disk
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exec $sgdisk --move-second-header [run_dir].img
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# create partition table entry pointing to the content
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exec $sgdisk --new=3:$first_sector:$last_sector [run_dir].img
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exec $sgdisk --change-name=3:GENODE [run_dir].img
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# create hybrid MBR
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exec $sgdisk --hybrid [run_dir].img
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set size_image [expr [regsub {\s.*} [exec du -sk [run_dir].img] {}]]
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puts "Created image file [run_dir].img (${size_image}kiB)"
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}
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