generate-fat.sh revision 264975
1#!/bin/sh 2 3# This script generates the dummy FAT filesystem used for the EFI boot 4# blocks. It uses newfs_msdos to generate a template filesystem with the 5# relevant interesting files. These are then found by grep, and the offsets 6# written to a Makefile snippet. 7# 8# Because it requires root, and because it is overkill, we do not 9# do this as part of the normal build. If makefs(8) grows workable FAT 10# support, this should be revisited. 11 12# $FreeBSD: head/sys/boot/amd64/boot1.efi/generate-fat.sh 264975 2014-04-26 16:34:22Z nwhitehorn $ 13 14FAT_SIZE=1600 #Size in 512-byte blocks of the produced image 15 16BOOT1_SIZE=64k 17 18# Generate 800K FAT image 19OUTPUT_FILE=fat.tmpl 20 21dd if=/dev/zero of=$OUTPUT_FILE bs=512 count=$FAT_SIZE 22DEVICE=`mdconfig -a -f $OUTPUT_FILE` 23newfs_msdos -F 12 $DEVICE 24mkdir stub 25mount -t msdosfs /dev/$DEVICE stub 26 27# Create and bless a directory for the boot loader 28mkdir -p stub/efi/boot 29 30# Make a dummy file for boot1 31echo 'Boot1 START' | dd of=stub/efi/boot/BOOTx64.efi cbs=$BOOT1_SIZE count=1 conv=block 32 33umount stub 34mdconfig -d -u $DEVICE 35rmdir stub 36 37# Locate the offsets of the two fake files 38BOOT1_OFFSET=$(hd $OUTPUT_FILE | grep 'Boot1 START' | cut -f 1 -d ' ') 39 40# Convert to numbers of blocks 41BOOT1_OFFSET=$(echo 0x$BOOT1_OFFSET | awk '{printf("%x\n",$1/512);}') 42 43echo '# This file autogenerated by generate-fat.sh - DO NOT EDIT' > Makefile.fat 44echo '# $FreeBSD: head/sys/boot/amd64/boot1.efi/generate-fat.sh 264975 2014-04-26 16:34:22Z nwhitehorn $' >> Makefile.fat 45echo "BOOT1_OFFSET=0x$BOOT1_OFFSET" >> Makefile.fat 46 47bzip2 $OUTPUT_FILE 48echo 'FAT template boot filesystem created by generate-fat.sh' > $OUTPUT_FILE.bz2.uu 49echo 'DO NOT EDIT' >> $OUTPUT_FILE.bz2.uu 50echo '$FreeBSD: head/sys/boot/amd64/boot1.efi/generate-fat.sh 264975 2014-04-26 16:34:22Z nwhitehorn $' >> $OUTPUT_FILE.bz2.uu 51 52uuencode $OUTPUT_FILE.bz2 $OUTPUT_FILE.bz2 >> $OUTPUT_FILE.bz2.uu 53rm $OUTPUT_FILE.bz2 54 55