[compiler-rt] [Fuzzer] make big-file-copy.test work with the internal shell (PR #168658)

[Aiden Grossman via llvm-commits]

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@@ -1,6 +1,6 @@
 REQUIRES: darwin
 UNSUPPORTED: ios
 RUN: %cpp_compiler %S/BigFileCopy.cpp -o %t
-RUN: %run %t -runs=1 -rss_limit_mb=4096 2>big-file-out.txt; result=$?
+RUN: bash -c "%run %t -runs=1 -rss_limit_mb=4096 2>big-file-out.txt; echo -n $? > %t.result"
 RUN: %run rm -f big-file.txt big-file-out.txt
-RUN: (exit $result)
+RUN: %python -c "import sys; sys.exit(%{readfile:%t.result})"
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boomanaiden154 wrote:

Good point. Updated to use something more similar to what you proposed to avoid all the indirection through files that is mostly pointless.

https://github.com/llvm/llvm-project/pull/168658