mirror of
https://gitlab.archlinux.org/tpowa/archboot.git
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66 lines
1.8 KiB
Bash
66 lines
1.8 KiB
Bash
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#!/bin/bash
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# based on mkusbimg, modified to use syslinux
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# by Tobias Powalowski <tpowa@archlinux.org>
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#
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# mkusbimg - creates a bootable disk image
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# Copyright (C) 2008 Simo Leone <simo@archlinux.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# usage(exitvalue)
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# outputs a usage message and exits with value
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APPNAME=$(basename "${0}")
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usage()
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{
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echo "usage: ${APPNAME} <imageroot> <imagefile>"
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exit $1
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}
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##################################################
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if [ $# -ne 2 ]; then
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usage 1
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fi
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DISKIMG="${2}"
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IMGROOT="${1}"
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TMPDIR=$(mktemp -d)
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FSIMG=$(mktemp)
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# ext2 overhead's upper bound is 6%
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# empirically tested up to 1GB
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rootsize=$(du -bs ${IMGROOT}|cut -f1)
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IMGSZ=$(( (${rootsize}*102)/100/512 + 1)) # image size in sectors
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# create the filesystem image file
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dd if=/dev/zero of="$FSIMG" bs=512 count="$IMGSZ"
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# create a filesystem on the image
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mkfs.vfat -S 512 "$FSIMG"
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# mount the filesystem and copy data
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modprobe loop
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mount -o loop "$FSIMG" "$TMPDIR"
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cp -r "$IMGROOT"/* "$TMPDIR"
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# unmount filesystem
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umount "$TMPDIR"
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cat "$FSIMG" > "$DISKIMG"
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# install syslinux on the image
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syslinux "$DISKIMG"
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# all done :)
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rm -fr "$TMPDIR" "$FSIMG"
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