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112 lines
2.9 KiB
Bash
112 lines
2.9 KiB
Bash
#!/usr/bin/env bash
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#
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# Copyright (C) 2016 Josua Mayer
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (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, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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usage() {
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echo "$0 <sectors> <outfile> <bootloader> [<type_partitionN> <sectors_partitionN> <img_partitionN>]?"
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}
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# always require first 3 arguments
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# then in pairs up to 8 more for a total of up to 4 partitions
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if [ $# -lt 3 ] || [ $# -gt 15 ] || [ $(($#%3)) -ne 0 ]; then
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usage
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exit 1
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fi
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set -e
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# parameters
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IMGSIZE=$1
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OUTFILE="$2"
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BOOTLOADER="$3"
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# calculate number of partitions from argument list
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NUMPARTS=$#
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((NUMPARTS=(NUMPARTS-3)/3))
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# find required applications
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FDISK=$(env PATH="/usr/local/sbin:/usr/sbin:/sbin:$PATH" which fdisk)
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# generate image file
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printf "Creating $OUTFILE from /dev/zero: "
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dd if=/dev/zero of="$OUTFILE" bs=512 count=1 >/dev/null
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printf "Done\n"
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# generate fdisk argument list
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printf "Generating fdisk argument list: "
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ARGSFILE=$(mktemp)
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# empty partition table
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printf "o\n" >> $ARGSFILE
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# actual partitions
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offset=2048
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for i in $(seq 1 1 $NUMPARTS); do
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((n=3+3*i-2)); type=$(eval echo \${$n})
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((n=3+3*i-1)); size=$(eval echo \${$n})
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((end=offset+size-1))
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printf "n\np\n%i\n\n%i\n" $i $end >> $ARGSFILE
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# special case on first aprtition: fdisk wont ask which one
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if [ $i -eq 1 ]; then
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printf "t\n%s\n" $type >> $ARGSFILE
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else
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printf "t\n%i\n%s\n" $i $type >> $ARGSFILE
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fi
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# add this partitions size to offset for next partition
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((offset=end+1))
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done
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# write and exit
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printf "w\n" >> $ARGSFILE
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printf "Done\n"
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# create real partition table using fdisk
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printf "Creating partition table: "
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cat $ARGSFILE | $FDISK "$OUTFILE" >/dev/null
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printf "Done\n"
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# remove temporary files
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printf "Cleaning up: "
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rm -f $ARGSFILE
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printf "Done\n"
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# install bootloader
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printf "Writing bootloader: "
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dd of="$OUTFILE" if="$BOOTLOADER" bs=512 seek=1 conv=notrunc 2>/dev/null
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printf "Done\n"
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# write partition data
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# offset of first partition is 2048
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offset=2048
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for i in $(seq 1 1 $NUMPARTS); do
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((n=3+3*i-1)); size=$(eval echo \${$n})
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((n=3+3*i)); img="$(eval echo \${$n})"
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printf "Writing %s to partition %i: " "$img" $i
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dd if="$img" of="$OUTFILE" bs=512 seek=$offset conv=notrunc 2>/dev/null
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printf "Done\n"
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# add this partitions size to offset for next partition
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((offset=offset+size))
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done
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