support: Introduce new subdirectory for test infrastructure

The new test driver in <support/test-driver.c> has feature parity with
the old one.  The main difference is that its hooking mechanism is
based on functions and function pointers instead of macros.  This
commit also implements a new environment variable, TEST_COREDUMPS,
which disables the code which disables coredumps (that is, it enables
them if the invocation environment has not disabled them).

<test-skeleton.c> defines wrapper functions so that it is possible to
use existing macros with the new-style hook functionality.

This commit changes only a few test cases to the new test driver, to
make sure that it works as expected.

1 files changed, 37 insertions, 0 deletions

diff --git a/support/temp_file.h b/support/temp_file.h
new file mode 100644
index 0000000000..1955f7b539
--- /dev/null
+++ b/support/temp_file.h
@@ -0,0 +1,37 @@
+/* Declarations for temporary file handling.
+   Copyright (C) 2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#ifndef SUPPORT_TEMP_FILE_H
+#define SUPPORT_TEMP_FILE_H
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+/* Schedule a temporary file for deletion on exit.  */
+void add_temp_file (const char *name);
+
+/* Create a temporary file.  Return the opened file descriptor on
+   success, or -1 on failure.  Write the file name to *FILENAME if
+   FILENAME is not NULL.  In this case, the caller is expected to free
+   *FILENAME.  */
+int create_temp_file (const char *base, char **filename);
+
+__END_DECLS
+
+#endif /* SUPPORT_TEMP_FILE_H */