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normalize non-zero exit values
Summary:
Various tests in the `lit` testing suite expect specific return codes
and forms of diagnostic message from utility programs. As per
POSIX.1-2017 XCU Section 1.4, Utility Description Defaults, "[the]
format of diagnostic messages for most utilities is unspecified".
The STDERR subsections of the `cat` and `wc` utilities merely indicate
that "[the] standard error shall be used only for diagnostic messages".
The corresponding EXIT STATUS subsections merely indicate, with regard
to errors, an exit value of >0.
The affected tests are updated to accept the applicable diagnostic
message as produced by the utilities on AIX. The exit value is
normalized using `not` as necessary.
Reviewers: xingxue, sfertile, jasonliu
Reviewed By: xingxue
Subscribers: delcypher, jsji, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D60553
llvm-svn: 359690
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- This will cause lit to automatically include the first 1K of data in
redirected output files when a command fails (previously if the command
failed, but the main point of the test was, say, a `FileCheck` later on, then
the log wasn't helpful in showing why the command failed).
llvm-svn: 272021
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- This only applies to scripts executed by the _internal_ shell script
interpreter.
- This patch reworks the log to look more like a shell transcript, and be less
verbose (but in the interest of calling attention to the important parts).
Here is an example of the new format, for commands with/without failures and
with/without output:
```
$ true
$ echo hi
hi
$ false
note: command had no output on stdout or stderr
error: command failed with exit status 1
```
llvm-svn: 271610
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