#129 acct01 test flawed, some test case bugs

[Peter Seebach]

The acct01 test failed on an embedded target board because the board has no /dev/tty/1, and as such, the test got ENOENT rather than EACCES.

I propose that the test case be amended to use /dev/null, eliminating the S390 #ifdefs.

Also, while debugging this, I noticed that the format strings for some of the error cases appeared to be invalid, and the test logic seemed, at best, gratuitously complicated. I believe the revised code to be correct, and I have had two other people review it just to be sure. :)

[Peter Seebach]

proposed patch

[Subrata Modak]

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Will verify and let you know soon.
--Subrata

[Subrata Modak]

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This is applied to.
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