1 #!/bin/sh 2 3 # Make a filesystem image. 4 # 5 # Copyright (C) 2019, 2021 Paul Boddie <paul@boddie.org.uk> 6 # 7 # This program is free software; you can redistribute it and/or 8 # modify it under the terms of the GNU General Public License as 9 # published by the Free Software Foundation; either version 2 of 10 # the License, or (at your option) any later version. 11 # 12 # This program is distributed in the hope that it will be useful, 13 # but WITHOUT ANY WARRANTY; without even the implied warranty of 14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 # GNU General Public License for more details. 16 # 17 # You should have received a copy of the GNU General Public License 18 # along with this program; if not, write to the Free Software 19 # Foundation, Inc., 51 Franklin Street, Fifth Floor, 20 # Boston, MA 02110-1301, USA 21 22 TARGET=$1 23 24 if [ -e "$TARGET" ] ; then 25 echo "File already exists: $TARGET" 1>&2 26 exit 1 27 fi 28 29 if [ ! "$TARGET" ] ; then 30 echo "Creating temporary file." 1>&2 31 TARGET=`mktemp` 32 fi 33 34 SIZE=${2:-2000} 35 36 # Make a filesystem. 37 38 dd if=/dev/zero of="$TARGET" bs=1024 count=1 seek="$SIZE" \ 39 > /dev/null 2>&1 40 41 if ! `/sbin/mkfs.ext2 -q "$TARGET"` ; then 42 exit 1 43 fi 44 45 echo "$TARGET" 46 47 # vim: tabstop=4 expandtab shiftwidth=4