test/env: multibyte env var to child process

Note: the test fails on non-Windows CI (Travis linux, Quickbuild bsd):
even on master before the env.c changes in this patch-series.
Maybe the unix part of printenv-test.c needs to be revisited.

Signed-off-by: Justin M. Keyes <justinkz@gmail.com>

1 files changed, 59 insertions, 0 deletions

diff --git a/test/functional/fixtures/printenv-test.c b/test/functional/fixtures/printenv-test.c
new file mode 100644
index 0000000000..5ac076f653
--- /dev/null
+++ b/test/functional/fixtures/printenv-test.c
@@ -0,0 +1,59 @@
+// This is an open source non-commercial project. Dear PVS-Studio, please check
+// it. PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
+
+#include <stdio.h>
+
+#ifdef WIN32
+# include <windows.h>
+#else
+# include <stdlib.h>
+#endif
+
+#ifdef WIN32
+int wmain(int argc, wchar_t **argv)
+#else
+int main(int argc, char **argv)
+#endif
+{
+  if (argc != 2) {
+    return 1;
+  }
+
+#ifdef WIN32
+  wchar_t *value = _wgetenv(argv[1]);
+  if (value == NULL) {
+    return 1;
+  }
+  int utf8_len = WideCharToMultiByte(CP_UTF8,
+                                     0,
+                                     value,
+                                     -1,
+                                     NULL,
+                                     0,
+                                     NULL,
+                                     NULL);
+  if (utf8_len == 0) {
+    return (int)GetLastError();
+  }
+  char *utf8_value = (char *)calloc((size_t)utf8_len, sizeof(char));
+  utf8_len = WideCharToMultiByte(CP_UTF8,
+                                 0,
+                                 value,
+                                 -1,
+                                 utf8_value,
+                                 utf8_len,
+                                 NULL,
+                                 NULL);
+  fprintf(stderr, "%s", utf8_value);
+  free(utf8_value);
+#else
+  char *value = getenv(argv[1]);
+  if (value == NULL) {
+    fprintf(stderr, "env var not found: %s", argv[1]);
+    return 1;
+  }
+  // Print to stderr to avoid buffering.
+  fprintf(stderr, "%s", value);
+#endif
+  return 0;
+}