Initially just testing erasing of Intel Software RAID signatures.
Chosen because it was expected to work, but turned out not to be true in
all cases.
The code needs to initialise GParted_Core::mainthread, construct
Gtk::Main() and execute xvfb-run because of this call chain:
GParted_Core::erase_filesystem_signatures()
GParted_Core::settle_device()
Utils::execute_command ("udevadm settle ...")
status.foreground = (Glib::Thread::self() == GParted_Core::mainthread)
Gtk::Main::run()
This was also needed when testing file system interface classes as
discussed in commits [1][2].
The test fails like this:
$ ./test_EraseFileSystemSignatures
...
[ RUN ] EraseFileSystemSignaturesTest.IntelSoftwareRAIDAligned
[ OK ] EraseFileSystemSignaturesTest.IntelSoftwareRAIDAligned (155 ms)
[ RUN ] EraseFileSystemSignaturesTest.IntelSoftwareRAIDUnaligned
test_EraseFileSystemSignatures.cc:286: Failure
Failed
image_contains_all_zeros(): First non-zero bytes:
0x00001A00 "Intel Raid ISM C" 49 6E 74 65 6C 20 52 61 69 64 20 49 53 4D 20 43
test_EraseFileSystemSignatures.cc:320: Failure
Value of: image_contains_all_zeros()
Actual: false
Expected: true
[ FAILED ] EraseFileSystemSignaturesTest.IntelSoftwareRAIDUnaligned (92 ms)
Manually write the same test image:
$ python << 'EOF'
signature = b'Intel Raid ISM Cfg Sig. '
import os
fd = os.open('/tmp/test.img', os.O_CREAT|os.O_WRONLY)
os.ftruncate(fd, 16*1024*1024 - 512)
os.lseek(fd, -(2*512), os.SEEK_END)
os.write(fd, signature)
os.close(fd)
EOF
Run gpartedbin /tmp/test.img and Format to > Cleared. GParted continues
to display the the image file as containing an ataraid signature.
$ blkid /tmp/test.img
/tmp/test.img: TYPE="isw_raid_member"
$ hexdump -C /tmp/test.img
00000000 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00fffa00 49 6e 74 65 6c 20 52 61 69 64 20 49 53 4d 20 43 |Intel Raid ISM C|
00fffa10 66 67 20 53 69 67 2e 20 00 00 00 00 00 00 00 00 |fg Sig. ........|
00fffa20 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
00fffe00
This signature is not being cleared when the device/partition/image size
is 512 bytes smaller than a whole MiB because the last 3.5 KiB is left
unwritten. This is because the last block of zeros written is 8 KiB
aligned to 4 KiB at the end of the device.
[1] a97c23c57c
Add initial create ext2 only FileSystem interface class test (!49)
[2] 8db9a83b39
Run test program under xvfb-run to satisfy need for an X11 display (!49)
Closes#220 - Format to Cleared not clearing "pdc" ataraid signature
4ce37d4fde