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These images contain various forms of corrupted filesystem which
e2fsck will correct. They are used as a regression test for e2fsck.
The test_script program will automatically run e2fsck against the
filesystem images. It will run them two times, and display the exit
status for each run. The meaning of the exit status codes are as
follows:
0 No filesystem errors were detected
1 Filesystem errors detected, but corrected
2 System should be rebooted
4 Filesystem errors left uncorrected
8 Operational error (generally means internal error,
or filesystem error that the e2fsck was not
prepared to deal with)
16 Usage or syntax error
During the regression test, the first exit code should be 1 (with the
exception of the empty filesystem, empty.img, which will have an exit
code of 0), and the second exit code should be 0. In other words, all
of the test filesystems in this directory (with the exception of
empty.img) have some sort of filesystem corruption, which e2fsck
should fix on the first pass. After the first pass, e2fsck should
leave a fully consistent filesystem with no detectable errors found in
the second pass.
NOTE: It appears that at least some versions of the original e2fsck do
not exit with an exit status code of 1 after correcting filesystem
errors. So if you modify the test_script to try running these
filesystems against the original e2fsck, you will have to inspect the
test_script.log file manually.
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Here's a one-line descriptons of the various test images in this
directory:
baddir.img Filesystem with a corrupted directory
badinode.img Filesystem with various different corrupted inode
entries.
badlkcnt.img Filesystem with deleted files with non-zero link count
badroot.img Filesystem with a file for a root directory
badtable.img Filesystem with blocks shared between the bitmaps and
inode table blocks and the bad block inode
bbfile.img Filesystem with files containing bad blocks
bitmaps.img Filesystem with corrupted inode and block bitmaps
dirlink.img Filesystem with a hard link to a directory
dup.img Filesystem with blocks claimed by two different files
dup2.img Filesystem with blocks claimed by three different files
end-bitmap.img Filesystem with corruption at the end of the block
bitmap
expand.img Tests e2fsck's ability to expand lost+found if
necessary
lpf.img Filesystem with disconnected files and no /lost+found
directory
mke2fs2b.img Filesystem with corruption similar to that
created by mke2fs version 0.2b
noroot.img Filesystem with a deleted root directory.
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