[compiler-rt] r350230 - [sanitizer_common] Add test for popen()

[Michal Gorny via llvm-commits]

Author: mgorny
Date: Wed Jan  2 09:37:00 2019
New Revision: 350230

URL: http://llvm.org/viewvc/llvm-project?rev=350230&view=rev
Log:
[sanitizer_common] Add test for popen()

Differential Revision: https://reviews.llvm.org/D56153

Added:
    compiler-rt/trunk/test/sanitizer_common/TestCases/Posix/popen.cc

Added: compiler-rt/trunk/test/sanitizer_common/TestCases/Posix/popen.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/sanitizer_common/TestCases/Posix/popen.cc?rev=350230&view=auto
==============================================================================
--- compiler-rt/trunk/test/sanitizer_common/TestCases/Posix/popen.cc (added)
+++ compiler-rt/trunk/test/sanitizer_common/TestCases/Posix/popen.cc Wed Jan  2 09:37:00 2019
@@ -0,0 +1,23 @@
+// RUN: %clangxx -g %s -o %t && %run %t | FileCheck %s
+// CHECK: 1
+// CHECK-NEXT: 2
+
+#include <assert.h>
+#include <stdio.h>
+
+int main(void) {
+  // use a tool that produces different output than input to verify
+  // that everything worked correctly
+  FILE *fp = popen("sort", "w");
+  assert(fp);
+
+  // verify that fileno() returns a meaningful descriptor (needed
+  // for the implementation of TSan)
+  assert(fileno(fp) != -1);
+
+  assert(fputs("2\n", fp) >= 0);
+  assert(fputs("1\n", fp) >= 0);
+  assert(pclose(fp) == 0);
+
+  return 0;
+}