1 #!/bin/sh 2 OPTS="-O bigalloc -C 8192" 3 SIZE=4096 4 IMG=/tmp/foo.img 5 TMP=$(mktemp) 6 SIZE_A=15000 7 SIZE_B=5000 8 SIZE_C=20000 9 10 DEBUGFS=./debugfs/debugfs 11 MKE2FS=./misc/mke2fs 12 FSCK=./e2fsck/e2fsck 13 14 dd if=/dev/zero of=$IMG bs=1k count=$SIZE 15 echo $MKE2FS -F -t ext4 -L test $OPTS test.img $SIZE 16 $MKE2FS -F -t ext4 -L test $OPTS $IMG $SIZE 17 dd if=/dev/zero of=$TMP bs=$SIZE_A count=1 >& /dev/null 18 echo Writing $SIZE_A bytes to a 19 $DEBUGFS -w -R "write $TMP a" $IMG 20 BLKS=$(./debugfs/debugfs -R "blocks a" $IMG) 21 cp /dev/null $TMP 22 echo "Releasing blocks $BLKS" 23 for i in $BLKS ; do echo "freeb $i" >> $TMP; done 24 $DEBUGFS -w $IMG < $TMP >& /dev/null 25 26 echo Writing $SIZE_B bytes to b 27 dd if=/dev/zero of=$TMP bs=$SIZE_B count=1 >& /dev/null 28 $DEBUGFS -w -R "write $TMP b" $IMG 29 if [ -n "$SIZE_C" ]; then 30 BLKS=$(./debugfs/debugfs -R "blocks b" $IMG) 31 cp /dev/null $TMP 32 echo "Releasing blocks $BLKS" 33 for i in $BLKS ; do echo "freeb $i" >> $TMP; done 34 $DEBUGFS -w $IMG < $TMP >& /dev/null 35 36 echo Writing $SIZE_C bytes to c 37 dd if=/dev/zero of=$TMP bs=$SIZE_C count=1 >& /dev/null 38 $DEBUGFS -w -R "write $TMP c" $IMG 39 fi 40 echo "set_inode_field a mtime 201107040000" > $TMP 41 echo "set_inode_field b mtime 201107050000" >> $TMP 42 if [ -n "$SIZE_C" ]; then 43 echo "set_inode_field c mtime 201107060000" >> $TMP 44 fi 45 $DEBUGFS -w $IMG < $TMP >& /dev/null 46 47 $FSCK -fy $IMG 48 rm $TMP 49 50
