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https://github.com/coreutils/coreutils.git
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50 lines
1.3 KiB
Bash
50 lines
1.3 KiB
Bash
#!/bin/sh
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# This is just for the record.
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# This test is not run.
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exit 0
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cat <<\EOF
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Prior to 5.0.91, ...
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The problem:
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On a VFAT file system with coreutils-5.0.90, `mv FOO foo' removes the
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sole copy of the file named by both the source and destination arguments.
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Demonstrate the problem, as root:
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cd /tmp \
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&& dd if=/dev/zero of=1 bs=8192 count=50 \
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&& mkdir mnt && mkfs -t vfat 1 \
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&& mount -oloop 1 mnt && cd mnt \
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&& printf something important > foo \
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&& mv foo FOO
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test -f FOO && echo PASS-1 || echo FAIL-1
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ln foo bar
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mv foo FOO
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test -f FOO && echo PASS-2 || echo FAIL-2
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And in case you actually do the above, you can do this to clean up:
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cd /tmp && umount /tmp/mnt && rm -r 1 mnt
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Hey! Can't create hard links on vfat.
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The above `ln' evokes an `operation not permitted' failure.
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This demonstrates the same thing with file system type `umsdos'
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No hard links:
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cd /tmp \
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&& dd if=/dev/zero of=1 bs=8192 count=50 \
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&& mkdir mnt && mkfs -t msdos 1 \
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&& mount -t umsdos -oloop 1 mnt && cd mnt \
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&& printf something important > foo \
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&& mv foo FOO
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test -f FOO && echo PASS-1 || echo FAIL-1
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ln foo bar
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mv foo FOO
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test -f FOO && echo PASS-2 || echo FAIL-2
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EOF
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