Every copy of EFI Shell V2.0 that I have found seems to have a file processing
bug.
It looks like appending to a file does not work as expected. The following
shell snippet does not work:
del test.dat
echo 1234 >> test.dat # This works
echo 5678 >> test.dat # This give "Error.
Unable to redirect file"
If I modify that shell snippet as follows it works:
del test.dat
echo 1234 > test.dat
echo 5678 >> test.dat
Additionally appending as ASCII also works:
del test.dat
echo 1234 >>a test.dat
echo 5678 >>a test.dat
This error carries over to programming interfaces. If I try to open an
existing file for append in Python I get an error"
f = open('ExistingFile', 'a')
# ERROR
However, if I open the file in mode 'r+' there is no error:
f = open('ExistingFile', 'r+')
f.seek(0,2)
What is going on here?
Thanks,
Lowell Dennis
Platform Software Engineer
Dell | Business Client
office +1 512 723 8880
fax +1 512 283 0149
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