50 lines
1.3 KiB
Bash
Executable File
50 lines
1.3 KiB
Bash
Executable File
#!/bin/sh
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OPTS="-O bigalloc -C 8192"
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SIZE=4096
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IMG=/tmp/foo.img
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TMP=$(mktemp)
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SIZE_A=15000
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SIZE_B=5000
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SIZE_C=20000
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DEBUGFS=./debugfs/debugfs
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MKE2FS=./misc/mke2fs
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FSCK=./e2fsck/e2fsck
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dd if=/dev/zero of=$IMG bs=1k count=$SIZE
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echo $MKE2FS -F -t ext4 -L test $OPTS test.img $SIZE
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$MKE2FS -F -t ext4 -L test $OPTS $IMG $SIZE
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dd if=/dev/zero of=$TMP bs=$SIZE_A count=1 >& /dev/null
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echo Writing $SIZE_A bytes to a
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$DEBUGFS -w -R "write $TMP a" $IMG
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BLKS=$(./debugfs/debugfs -R "blocks a" $IMG)
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cp /dev/null $TMP
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echo "Releasing blocks $BLKS"
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for i in $BLKS ; do echo "freeb $i" >> $TMP; done
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$DEBUGFS -w $IMG < $TMP >& /dev/null
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echo Writing $SIZE_B bytes to b
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dd if=/dev/zero of=$TMP bs=$SIZE_B count=1 >& /dev/null
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$DEBUGFS -w -R "write $TMP b" $IMG
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if [ -n "$SIZE_C" ]; then
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BLKS=$(./debugfs/debugfs -R "blocks b" $IMG)
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cp /dev/null $TMP
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echo "Releasing blocks $BLKS"
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for i in $BLKS ; do echo "freeb $i" >> $TMP; done
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$DEBUGFS -w $IMG < $TMP >& /dev/null
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echo Writing $SIZE_C bytes to c
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dd if=/dev/zero of=$TMP bs=$SIZE_C count=1 >& /dev/null
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$DEBUGFS -w -R "write $TMP c" $IMG
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fi
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echo "set_inode_field a mtime 201107040000" > $TMP
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echo "set_inode_field b mtime 201107050000" >> $TMP
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if [ -n "$SIZE_C" ]; then
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echo "set_inode_field c mtime 201107060000" >> $TMP
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fi
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$DEBUGFS -w $IMG < $TMP >& /dev/null
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$FSCK -fy $IMG
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rm $TMP
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